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1 | /* |
1 | /* |
2 | * Copyright © 2014 Red Hat |
2 | * Copyright © 2014 Red Hat |
3 | * |
3 | * |
4 | * Permission to use, copy, modify, distribute, and sell this software and its |
4 | * Permission to use, copy, modify, distribute, and sell this software and its |
5 | * documentation for any purpose is hereby granted without fee, provided that |
5 | * documentation for any purpose is hereby granted without fee, provided that |
6 | * the above copyright notice appear in all copies and that both that copyright |
6 | * the above copyright notice appear in all copies and that both that copyright |
7 | * notice and this permission notice appear in supporting documentation, and |
7 | * notice and this permission notice appear in supporting documentation, and |
8 | * that the name of the copyright holders not be used in advertising or |
8 | * that the name of the copyright holders not be used in advertising or |
9 | * publicity pertaining to distribution of the software without specific, |
9 | * publicity pertaining to distribution of the software without specific, |
10 | * written prior permission. The copyright holders make no representations |
10 | * written prior permission. The copyright holders make no representations |
11 | * about the suitability of this software for any purpose. It is provided "as |
11 | * about the suitability of this software for any purpose. It is provided "as |
12 | * is" without express or implied warranty. |
12 | * is" without express or implied warranty. |
13 | * |
13 | * |
14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
16 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
16 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
20 | * OF THIS SOFTWARE. |
20 | * OF THIS SOFTWARE. |
21 | */ |
21 | */ |
22 | 22 | ||
23 | #include |
23 | #include |
24 | #include |
- | |
25 | #include |
- | |
26 | #include |
- | |
27 | #include |
- | |
28 | #include |
24 | #include |
29 | #include |
25 | #include |
30 | #include |
26 | #include |
31 | #include |
27 | #include |
32 | #include |
28 | #include |
33 | #include |
29 | #include |
34 | #include |
30 | #include |
35 | #include |
31 | #include |
36 | 32 | ||
37 | #include |
33 | #include |
38 | 34 | ||
39 | u64 get_jiffies_64(void) |
35 | u64 get_jiffies_64(void) |
40 | { |
36 | { |
41 | return jiffies; |
37 | return jiffies; |
42 | } |
38 | } |
43 | /** |
39 | /** |
44 | * DOC: dp mst helper |
40 | * DOC: dp mst helper |
45 | * |
41 | * |
46 | * These functions contain parts of the DisplayPort 1.2a MultiStream Transport |
42 | * These functions contain parts of the DisplayPort 1.2a MultiStream Transport |
47 | * protocol. The helpers contain a topology manager and bandwidth manager. |
43 | * protocol. The helpers contain a topology manager and bandwidth manager. |
48 | * The helpers encapsulate the sending and received of sideband msgs. |
44 | * The helpers encapsulate the sending and received of sideband msgs. |
49 | */ |
45 | */ |
50 | static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr, |
46 | static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr, |
51 | char *buf); |
47 | char *buf); |
52 | static int test_calc_pbn_mode(void); |
48 | static int test_calc_pbn_mode(void); |
53 | 49 | ||
54 | static void drm_dp_put_port(struct drm_dp_mst_port *port); |
50 | static void drm_dp_put_port(struct drm_dp_mst_port *port); |
55 | 51 | ||
56 | static int drm_dp_dpcd_write_payload(struct drm_dp_mst_topology_mgr *mgr, |
52 | static int drm_dp_dpcd_write_payload(struct drm_dp_mst_topology_mgr *mgr, |
57 | int id, |
53 | int id, |
58 | struct drm_dp_payload *payload); |
54 | struct drm_dp_payload *payload); |
59 | 55 | ||
60 | static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr, |
56 | static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr, |
61 | struct drm_dp_mst_port *port, |
57 | struct drm_dp_mst_port *port, |
62 | int offset, int size, u8 *bytes); |
58 | int offset, int size, u8 *bytes); |
63 | 59 | ||
64 | static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr, |
60 | static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr, |
65 | struct drm_dp_mst_branch *mstb); |
61 | struct drm_dp_mst_branch *mstb); |
66 | static int drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr, |
62 | static int drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr, |
67 | struct drm_dp_mst_branch *mstb, |
63 | struct drm_dp_mst_branch *mstb, |
68 | struct drm_dp_mst_port *port); |
64 | struct drm_dp_mst_port *port); |
69 | static bool drm_dp_validate_guid(struct drm_dp_mst_topology_mgr *mgr, |
65 | static bool drm_dp_validate_guid(struct drm_dp_mst_topology_mgr *mgr, |
70 | u8 *guid); |
66 | u8 *guid); |
71 | 67 | ||
72 | static int drm_dp_mst_register_i2c_bus(struct drm_dp_aux *aux); |
68 | static int drm_dp_mst_register_i2c_bus(struct drm_dp_aux *aux); |
73 | static void drm_dp_mst_unregister_i2c_bus(struct drm_dp_aux *aux); |
69 | static void drm_dp_mst_unregister_i2c_bus(struct drm_dp_aux *aux); |
74 | static void drm_dp_mst_kick_tx(struct drm_dp_mst_topology_mgr *mgr); |
70 | static void drm_dp_mst_kick_tx(struct drm_dp_mst_topology_mgr *mgr); |
75 | /* sideband msg handling */ |
71 | /* sideband msg handling */ |
76 | static u8 drm_dp_msg_header_crc4(const uint8_t *data, size_t num_nibbles) |
72 | static u8 drm_dp_msg_header_crc4(const uint8_t *data, size_t num_nibbles) |
77 | { |
73 | { |
78 | u8 bitmask = 0x80; |
74 | u8 bitmask = 0x80; |
79 | u8 bitshift = 7; |
75 | u8 bitshift = 7; |
80 | u8 array_index = 0; |
76 | u8 array_index = 0; |
81 | int number_of_bits = num_nibbles * 4; |
77 | int number_of_bits = num_nibbles * 4; |
82 | u8 remainder = 0; |
78 | u8 remainder = 0; |
83 | 79 | ||
84 | while (number_of_bits != 0) { |
80 | while (number_of_bits != 0) { |
85 | number_of_bits--; |
81 | number_of_bits--; |
86 | remainder <<= 1; |
82 | remainder <<= 1; |
87 | remainder |= (data[array_index] & bitmask) >> bitshift; |
83 | remainder |= (data[array_index] & bitmask) >> bitshift; |
88 | bitmask >>= 1; |
84 | bitmask >>= 1; |
89 | bitshift--; |
85 | bitshift--; |
90 | if (bitmask == 0) { |
86 | if (bitmask == 0) { |
91 | bitmask = 0x80; |
87 | bitmask = 0x80; |
92 | bitshift = 7; |
88 | bitshift = 7; |
93 | array_index++; |
89 | array_index++; |
94 | } |
90 | } |
95 | if ((remainder & 0x10) == 0x10) |
91 | if ((remainder & 0x10) == 0x10) |
96 | remainder ^= 0x13; |
92 | remainder ^= 0x13; |
97 | } |
93 | } |
98 | 94 | ||
99 | number_of_bits = 4; |
95 | number_of_bits = 4; |
100 | while (number_of_bits != 0) { |
96 | while (number_of_bits != 0) { |
101 | number_of_bits--; |
97 | number_of_bits--; |
102 | remainder <<= 1; |
98 | remainder <<= 1; |
103 | if ((remainder & 0x10) != 0) |
99 | if ((remainder & 0x10) != 0) |
104 | remainder ^= 0x13; |
100 | remainder ^= 0x13; |
105 | } |
101 | } |
106 | 102 | ||
107 | return remainder; |
103 | return remainder; |
108 | } |
104 | } |
109 | 105 | ||
110 | static u8 drm_dp_msg_data_crc4(const uint8_t *data, u8 number_of_bytes) |
106 | static u8 drm_dp_msg_data_crc4(const uint8_t *data, u8 number_of_bytes) |
111 | { |
107 | { |
112 | u8 bitmask = 0x80; |
108 | u8 bitmask = 0x80; |
113 | u8 bitshift = 7; |
109 | u8 bitshift = 7; |
114 | u8 array_index = 0; |
110 | u8 array_index = 0; |
115 | int number_of_bits = number_of_bytes * 8; |
111 | int number_of_bits = number_of_bytes * 8; |
116 | u16 remainder = 0; |
112 | u16 remainder = 0; |
117 | 113 | ||
118 | while (number_of_bits != 0) { |
114 | while (number_of_bits != 0) { |
119 | number_of_bits--; |
115 | number_of_bits--; |
120 | remainder <<= 1; |
116 | remainder <<= 1; |
121 | remainder |= (data[array_index] & bitmask) >> bitshift; |
117 | remainder |= (data[array_index] & bitmask) >> bitshift; |
122 | bitmask >>= 1; |
118 | bitmask >>= 1; |
123 | bitshift--; |
119 | bitshift--; |
124 | if (bitmask == 0) { |
120 | if (bitmask == 0) { |
125 | bitmask = 0x80; |
121 | bitmask = 0x80; |
126 | bitshift = 7; |
122 | bitshift = 7; |
127 | array_index++; |
123 | array_index++; |
128 | } |
124 | } |
129 | if ((remainder & 0x100) == 0x100) |
125 | if ((remainder & 0x100) == 0x100) |
130 | remainder ^= 0xd5; |
126 | remainder ^= 0xd5; |
131 | } |
127 | } |
132 | 128 | ||
133 | number_of_bits = 8; |
129 | number_of_bits = 8; |
134 | while (number_of_bits != 0) { |
130 | while (number_of_bits != 0) { |
135 | number_of_bits--; |
131 | number_of_bits--; |
136 | remainder <<= 1; |
132 | remainder <<= 1; |
137 | if ((remainder & 0x100) != 0) |
133 | if ((remainder & 0x100) != 0) |
138 | remainder ^= 0xd5; |
134 | remainder ^= 0xd5; |
139 | } |
135 | } |
140 | 136 | ||
141 | return remainder & 0xff; |
137 | return remainder & 0xff; |
142 | } |
138 | } |
143 | static inline u8 drm_dp_calc_sb_hdr_size(struct drm_dp_sideband_msg_hdr *hdr) |
139 | static inline u8 drm_dp_calc_sb_hdr_size(struct drm_dp_sideband_msg_hdr *hdr) |
144 | { |
140 | { |
145 | u8 size = 3; |
141 | u8 size = 3; |
146 | size += (hdr->lct / 2); |
142 | size += (hdr->lct / 2); |
147 | return size; |
143 | return size; |
148 | } |
144 | } |
149 | 145 | ||
150 | static void drm_dp_encode_sideband_msg_hdr(struct drm_dp_sideband_msg_hdr *hdr, |
146 | static void drm_dp_encode_sideband_msg_hdr(struct drm_dp_sideband_msg_hdr *hdr, |
151 | u8 *buf, int *len) |
147 | u8 *buf, int *len) |
152 | { |
148 | { |
153 | int idx = 0; |
149 | int idx = 0; |
154 | int i; |
150 | int i; |
155 | u8 crc4; |
151 | u8 crc4; |
156 | buf[idx++] = ((hdr->lct & 0xf) << 4) | (hdr->lcr & 0xf); |
152 | buf[idx++] = ((hdr->lct & 0xf) << 4) | (hdr->lcr & 0xf); |
157 | for (i = 0; i < (hdr->lct / 2); i++) |
153 | for (i = 0; i < (hdr->lct / 2); i++) |
158 | buf[idx++] = hdr->rad[i]; |
154 | buf[idx++] = hdr->rad[i]; |
159 | buf[idx++] = (hdr->broadcast << 7) | (hdr->path_msg << 6) | |
155 | buf[idx++] = (hdr->broadcast << 7) | (hdr->path_msg << 6) | |
160 | (hdr->msg_len & 0x3f); |
156 | (hdr->msg_len & 0x3f); |
161 | buf[idx++] = (hdr->somt << 7) | (hdr->eomt << 6) | (hdr->seqno << 4); |
157 | buf[idx++] = (hdr->somt << 7) | (hdr->eomt << 6) | (hdr->seqno << 4); |
162 | 158 | ||
163 | crc4 = drm_dp_msg_header_crc4(buf, (idx * 2) - 1); |
159 | crc4 = drm_dp_msg_header_crc4(buf, (idx * 2) - 1); |
164 | buf[idx - 1] |= (crc4 & 0xf); |
160 | buf[idx - 1] |= (crc4 & 0xf); |
165 | 161 | ||
166 | *len = idx; |
162 | *len = idx; |
167 | } |
163 | } |
168 | 164 | ||
169 | static bool drm_dp_decode_sideband_msg_hdr(struct drm_dp_sideband_msg_hdr *hdr, |
165 | static bool drm_dp_decode_sideband_msg_hdr(struct drm_dp_sideband_msg_hdr *hdr, |
170 | u8 *buf, int buflen, u8 *hdrlen) |
166 | u8 *buf, int buflen, u8 *hdrlen) |
171 | { |
167 | { |
172 | u8 crc4; |
168 | u8 crc4; |
173 | u8 len; |
169 | u8 len; |
174 | int i; |
170 | int i; |
175 | u8 idx; |
171 | u8 idx; |
176 | if (buf[0] == 0) |
172 | if (buf[0] == 0) |
177 | return false; |
173 | return false; |
178 | len = 3; |
174 | len = 3; |
179 | len += ((buf[0] & 0xf0) >> 4) / 2; |
175 | len += ((buf[0] & 0xf0) >> 4) / 2; |
180 | if (len > buflen) |
176 | if (len > buflen) |
181 | return false; |
177 | return false; |
182 | crc4 = drm_dp_msg_header_crc4(buf, (len * 2) - 1); |
178 | crc4 = drm_dp_msg_header_crc4(buf, (len * 2) - 1); |
183 | 179 | ||
184 | if ((crc4 & 0xf) != (buf[len - 1] & 0xf)) { |
180 | if ((crc4 & 0xf) != (buf[len - 1] & 0xf)) { |
185 | DRM_DEBUG_KMS("crc4 mismatch 0x%x 0x%x\n", crc4, buf[len - 1]); |
181 | DRM_DEBUG_KMS("crc4 mismatch 0x%x 0x%x\n", crc4, buf[len - 1]); |
186 | return false; |
182 | return false; |
187 | } |
183 | } |
188 | 184 | ||
189 | hdr->lct = (buf[0] & 0xf0) >> 4; |
185 | hdr->lct = (buf[0] & 0xf0) >> 4; |
190 | hdr->lcr = (buf[0] & 0xf); |
186 | hdr->lcr = (buf[0] & 0xf); |
191 | idx = 1; |
187 | idx = 1; |
192 | for (i = 0; i < (hdr->lct / 2); i++) |
188 | for (i = 0; i < (hdr->lct / 2); i++) |
193 | hdr->rad[i] = buf[idx++]; |
189 | hdr->rad[i] = buf[idx++]; |
194 | hdr->broadcast = (buf[idx] >> 7) & 0x1; |
190 | hdr->broadcast = (buf[idx] >> 7) & 0x1; |
195 | hdr->path_msg = (buf[idx] >> 6) & 0x1; |
191 | hdr->path_msg = (buf[idx] >> 6) & 0x1; |
196 | hdr->msg_len = buf[idx] & 0x3f; |
192 | hdr->msg_len = buf[idx] & 0x3f; |
197 | idx++; |
193 | idx++; |
198 | hdr->somt = (buf[idx] >> 7) & 0x1; |
194 | hdr->somt = (buf[idx] >> 7) & 0x1; |
199 | hdr->eomt = (buf[idx] >> 6) & 0x1; |
195 | hdr->eomt = (buf[idx] >> 6) & 0x1; |
200 | hdr->seqno = (buf[idx] >> 4) & 0x1; |
196 | hdr->seqno = (buf[idx] >> 4) & 0x1; |
201 | idx++; |
197 | idx++; |
202 | *hdrlen = idx; |
198 | *hdrlen = idx; |
203 | return true; |
199 | return true; |
204 | } |
200 | } |
205 | 201 | ||
206 | static void drm_dp_encode_sideband_req(struct drm_dp_sideband_msg_req_body *req, |
202 | static void drm_dp_encode_sideband_req(struct drm_dp_sideband_msg_req_body *req, |
207 | struct drm_dp_sideband_msg_tx *raw) |
203 | struct drm_dp_sideband_msg_tx *raw) |
208 | { |
204 | { |
209 | int idx = 0; |
205 | int idx = 0; |
210 | int i; |
206 | int i; |
211 | u8 *buf = raw->msg; |
207 | u8 *buf = raw->msg; |
212 | buf[idx++] = req->req_type & 0x7f; |
208 | buf[idx++] = req->req_type & 0x7f; |
213 | 209 | ||
214 | switch (req->req_type) { |
210 | switch (req->req_type) { |
215 | case DP_ENUM_PATH_RESOURCES: |
211 | case DP_ENUM_PATH_RESOURCES: |
216 | buf[idx] = (req->u.port_num.port_number & 0xf) << 4; |
212 | buf[idx] = (req->u.port_num.port_number & 0xf) << 4; |
217 | idx++; |
213 | idx++; |
218 | break; |
214 | break; |
219 | case DP_ALLOCATE_PAYLOAD: |
215 | case DP_ALLOCATE_PAYLOAD: |
220 | buf[idx] = (req->u.allocate_payload.port_number & 0xf) << 4 | |
216 | buf[idx] = (req->u.allocate_payload.port_number & 0xf) << 4 | |
221 | (req->u.allocate_payload.number_sdp_streams & 0xf); |
217 | (req->u.allocate_payload.number_sdp_streams & 0xf); |
222 | idx++; |
218 | idx++; |
223 | buf[idx] = (req->u.allocate_payload.vcpi & 0x7f); |
219 | buf[idx] = (req->u.allocate_payload.vcpi & 0x7f); |
224 | idx++; |
220 | idx++; |
225 | buf[idx] = (req->u.allocate_payload.pbn >> 8); |
221 | buf[idx] = (req->u.allocate_payload.pbn >> 8); |
226 | idx++; |
222 | idx++; |
227 | buf[idx] = (req->u.allocate_payload.pbn & 0xff); |
223 | buf[idx] = (req->u.allocate_payload.pbn & 0xff); |
228 | idx++; |
224 | idx++; |
229 | for (i = 0; i < req->u.allocate_payload.number_sdp_streams / 2; i++) { |
225 | for (i = 0; i < req->u.allocate_payload.number_sdp_streams / 2; i++) { |
230 | buf[idx] = ((req->u.allocate_payload.sdp_stream_sink[i * 2] & 0xf) << 4) | |
226 | buf[idx] = ((req->u.allocate_payload.sdp_stream_sink[i * 2] & 0xf) << 4) | |
231 | (req->u.allocate_payload.sdp_stream_sink[i * 2 + 1] & 0xf); |
227 | (req->u.allocate_payload.sdp_stream_sink[i * 2 + 1] & 0xf); |
232 | idx++; |
228 | idx++; |
233 | } |
229 | } |
234 | if (req->u.allocate_payload.number_sdp_streams & 1) { |
230 | if (req->u.allocate_payload.number_sdp_streams & 1) { |
235 | i = req->u.allocate_payload.number_sdp_streams - 1; |
231 | i = req->u.allocate_payload.number_sdp_streams - 1; |
236 | buf[idx] = (req->u.allocate_payload.sdp_stream_sink[i] & 0xf) << 4; |
232 | buf[idx] = (req->u.allocate_payload.sdp_stream_sink[i] & 0xf) << 4; |
237 | idx++; |
233 | idx++; |
238 | } |
234 | } |
239 | break; |
235 | break; |
240 | case DP_QUERY_PAYLOAD: |
236 | case DP_QUERY_PAYLOAD: |
241 | buf[idx] = (req->u.query_payload.port_number & 0xf) << 4; |
237 | buf[idx] = (req->u.query_payload.port_number & 0xf) << 4; |
242 | idx++; |
238 | idx++; |
243 | buf[idx] = (req->u.query_payload.vcpi & 0x7f); |
239 | buf[idx] = (req->u.query_payload.vcpi & 0x7f); |
244 | idx++; |
240 | idx++; |
245 | break; |
241 | break; |
246 | case DP_REMOTE_DPCD_READ: |
242 | case DP_REMOTE_DPCD_READ: |
247 | buf[idx] = (req->u.dpcd_read.port_number & 0xf) << 4; |
243 | buf[idx] = (req->u.dpcd_read.port_number & 0xf) << 4; |
248 | buf[idx] |= ((req->u.dpcd_read.dpcd_address & 0xf0000) >> 16) & 0xf; |
244 | buf[idx] |= ((req->u.dpcd_read.dpcd_address & 0xf0000) >> 16) & 0xf; |
249 | idx++; |
245 | idx++; |
250 | buf[idx] = (req->u.dpcd_read.dpcd_address & 0xff00) >> 8; |
246 | buf[idx] = (req->u.dpcd_read.dpcd_address & 0xff00) >> 8; |
251 | idx++; |
247 | idx++; |
252 | buf[idx] = (req->u.dpcd_read.dpcd_address & 0xff); |
248 | buf[idx] = (req->u.dpcd_read.dpcd_address & 0xff); |
253 | idx++; |
249 | idx++; |
254 | buf[idx] = (req->u.dpcd_read.num_bytes); |
250 | buf[idx] = (req->u.dpcd_read.num_bytes); |
255 | idx++; |
251 | idx++; |
256 | break; |
252 | break; |
257 | 253 | ||
258 | case DP_REMOTE_DPCD_WRITE: |
254 | case DP_REMOTE_DPCD_WRITE: |
259 | buf[idx] = (req->u.dpcd_write.port_number & 0xf) << 4; |
255 | buf[idx] = (req->u.dpcd_write.port_number & 0xf) << 4; |
260 | buf[idx] |= ((req->u.dpcd_write.dpcd_address & 0xf0000) >> 16) & 0xf; |
256 | buf[idx] |= ((req->u.dpcd_write.dpcd_address & 0xf0000) >> 16) & 0xf; |
261 | idx++; |
257 | idx++; |
262 | buf[idx] = (req->u.dpcd_write.dpcd_address & 0xff00) >> 8; |
258 | buf[idx] = (req->u.dpcd_write.dpcd_address & 0xff00) >> 8; |
263 | idx++; |
259 | idx++; |
264 | buf[idx] = (req->u.dpcd_write.dpcd_address & 0xff); |
260 | buf[idx] = (req->u.dpcd_write.dpcd_address & 0xff); |
265 | idx++; |
261 | idx++; |
266 | buf[idx] = (req->u.dpcd_write.num_bytes); |
262 | buf[idx] = (req->u.dpcd_write.num_bytes); |
267 | idx++; |
263 | idx++; |
268 | memcpy(&buf[idx], req->u.dpcd_write.bytes, req->u.dpcd_write.num_bytes); |
264 | memcpy(&buf[idx], req->u.dpcd_write.bytes, req->u.dpcd_write.num_bytes); |
269 | idx += req->u.dpcd_write.num_bytes; |
265 | idx += req->u.dpcd_write.num_bytes; |
270 | break; |
266 | break; |
271 | case DP_REMOTE_I2C_READ: |
267 | case DP_REMOTE_I2C_READ: |
272 | buf[idx] = (req->u.i2c_read.port_number & 0xf) << 4; |
268 | buf[idx] = (req->u.i2c_read.port_number & 0xf) << 4; |
273 | buf[idx] |= (req->u.i2c_read.num_transactions & 0x3); |
269 | buf[idx] |= (req->u.i2c_read.num_transactions & 0x3); |
274 | idx++; |
270 | idx++; |
275 | for (i = 0; i < (req->u.i2c_read.num_transactions & 0x3); i++) { |
271 | for (i = 0; i < (req->u.i2c_read.num_transactions & 0x3); i++) { |
276 | buf[idx] = req->u.i2c_read.transactions[i].i2c_dev_id & 0x7f; |
272 | buf[idx] = req->u.i2c_read.transactions[i].i2c_dev_id & 0x7f; |
277 | idx++; |
273 | idx++; |
278 | buf[idx] = req->u.i2c_read.transactions[i].num_bytes; |
274 | buf[idx] = req->u.i2c_read.transactions[i].num_bytes; |
279 | idx++; |
275 | idx++; |
280 | memcpy(&buf[idx], req->u.i2c_read.transactions[i].bytes, req->u.i2c_read.transactions[i].num_bytes); |
276 | memcpy(&buf[idx], req->u.i2c_read.transactions[i].bytes, req->u.i2c_read.transactions[i].num_bytes); |
281 | idx += req->u.i2c_read.transactions[i].num_bytes; |
277 | idx += req->u.i2c_read.transactions[i].num_bytes; |
282 | 278 | ||
283 | buf[idx] = (req->u.i2c_read.transactions[i].no_stop_bit & 0x1) << 5; |
279 | buf[idx] = (req->u.i2c_read.transactions[i].no_stop_bit & 0x1) << 5; |
284 | buf[idx] |= (req->u.i2c_read.transactions[i].i2c_transaction_delay & 0xf); |
280 | buf[idx] |= (req->u.i2c_read.transactions[i].i2c_transaction_delay & 0xf); |
285 | idx++; |
281 | idx++; |
286 | } |
282 | } |
287 | buf[idx] = (req->u.i2c_read.read_i2c_device_id) & 0x7f; |
283 | buf[idx] = (req->u.i2c_read.read_i2c_device_id) & 0x7f; |
288 | idx++; |
284 | idx++; |
289 | buf[idx] = (req->u.i2c_read.num_bytes_read); |
285 | buf[idx] = (req->u.i2c_read.num_bytes_read); |
290 | idx++; |
286 | idx++; |
291 | break; |
287 | break; |
292 | 288 | ||
293 | case DP_REMOTE_I2C_WRITE: |
289 | case DP_REMOTE_I2C_WRITE: |
294 | buf[idx] = (req->u.i2c_write.port_number & 0xf) << 4; |
290 | buf[idx] = (req->u.i2c_write.port_number & 0xf) << 4; |
295 | idx++; |
291 | idx++; |
296 | buf[idx] = (req->u.i2c_write.write_i2c_device_id) & 0x7f; |
292 | buf[idx] = (req->u.i2c_write.write_i2c_device_id) & 0x7f; |
297 | idx++; |
293 | idx++; |
298 | buf[idx] = (req->u.i2c_write.num_bytes); |
294 | buf[idx] = (req->u.i2c_write.num_bytes); |
299 | idx++; |
295 | idx++; |
300 | memcpy(&buf[idx], req->u.i2c_write.bytes, req->u.i2c_write.num_bytes); |
296 | memcpy(&buf[idx], req->u.i2c_write.bytes, req->u.i2c_write.num_bytes); |
301 | idx += req->u.i2c_write.num_bytes; |
297 | idx += req->u.i2c_write.num_bytes; |
302 | break; |
298 | break; |
303 | } |
299 | } |
304 | raw->cur_len = idx; |
300 | raw->cur_len = idx; |
305 | } |
301 | } |
306 | 302 | ||
307 | static void drm_dp_crc_sideband_chunk_req(u8 *msg, u8 len) |
303 | static void drm_dp_crc_sideband_chunk_req(u8 *msg, u8 len) |
308 | { |
304 | { |
309 | u8 crc4; |
305 | u8 crc4; |
310 | crc4 = drm_dp_msg_data_crc4(msg, len); |
306 | crc4 = drm_dp_msg_data_crc4(msg, len); |
311 | msg[len] = crc4; |
307 | msg[len] = crc4; |
312 | } |
308 | } |
313 | 309 | ||
314 | static void drm_dp_encode_sideband_reply(struct drm_dp_sideband_msg_reply_body *rep, |
310 | static void drm_dp_encode_sideband_reply(struct drm_dp_sideband_msg_reply_body *rep, |
315 | struct drm_dp_sideband_msg_tx *raw) |
311 | struct drm_dp_sideband_msg_tx *raw) |
316 | { |
312 | { |
317 | int idx = 0; |
313 | int idx = 0; |
318 | u8 *buf = raw->msg; |
314 | u8 *buf = raw->msg; |
319 | 315 | ||
320 | buf[idx++] = (rep->reply_type & 0x1) << 7 | (rep->req_type & 0x7f); |
316 | buf[idx++] = (rep->reply_type & 0x1) << 7 | (rep->req_type & 0x7f); |
321 | 317 | ||
322 | raw->cur_len = idx; |
318 | raw->cur_len = idx; |
323 | } |
319 | } |
324 | 320 | ||
325 | /* this adds a chunk of msg to the builder to get the final msg */ |
321 | /* this adds a chunk of msg to the builder to get the final msg */ |
326 | static bool drm_dp_sideband_msg_build(struct drm_dp_sideband_msg_rx *msg, |
322 | static bool drm_dp_sideband_msg_build(struct drm_dp_sideband_msg_rx *msg, |
327 | u8 *replybuf, u8 replybuflen, bool hdr) |
323 | u8 *replybuf, u8 replybuflen, bool hdr) |
328 | { |
324 | { |
329 | int ret; |
325 | int ret; |
330 | u8 crc4; |
326 | u8 crc4; |
331 | 327 | ||
332 | if (hdr) { |
328 | if (hdr) { |
333 | u8 hdrlen; |
329 | u8 hdrlen; |
334 | struct drm_dp_sideband_msg_hdr recv_hdr; |
330 | struct drm_dp_sideband_msg_hdr recv_hdr; |
335 | ret = drm_dp_decode_sideband_msg_hdr(&recv_hdr, replybuf, replybuflen, &hdrlen); |
331 | ret = drm_dp_decode_sideband_msg_hdr(&recv_hdr, replybuf, replybuflen, &hdrlen); |
336 | if (ret == false) { |
332 | if (ret == false) { |
337 | print_hex_dump(KERN_DEBUG, "failed hdr", DUMP_PREFIX_NONE, 16, 1, replybuf, replybuflen, false); |
333 | print_hex_dump(KERN_DEBUG, "failed hdr", DUMP_PREFIX_NONE, 16, 1, replybuf, replybuflen, false); |
338 | return false; |
334 | return false; |
339 | } |
335 | } |
340 | 336 | ||
341 | /* get length contained in this portion */ |
337 | /* get length contained in this portion */ |
342 | msg->curchunk_len = recv_hdr.msg_len; |
338 | msg->curchunk_len = recv_hdr.msg_len; |
343 | msg->curchunk_hdrlen = hdrlen; |
339 | msg->curchunk_hdrlen = hdrlen; |
344 | 340 | ||
345 | /* we have already gotten an somt - don't bother parsing */ |
341 | /* we have already gotten an somt - don't bother parsing */ |
346 | if (recv_hdr.somt && msg->have_somt) |
342 | if (recv_hdr.somt && msg->have_somt) |
347 | return false; |
343 | return false; |
348 | 344 | ||
349 | if (recv_hdr.somt) { |
345 | if (recv_hdr.somt) { |
350 | memcpy(&msg->initial_hdr, &recv_hdr, sizeof(struct drm_dp_sideband_msg_hdr)); |
346 | memcpy(&msg->initial_hdr, &recv_hdr, sizeof(struct drm_dp_sideband_msg_hdr)); |
351 | msg->have_somt = true; |
347 | msg->have_somt = true; |
352 | } |
348 | } |
353 | if (recv_hdr.eomt) |
349 | if (recv_hdr.eomt) |
354 | msg->have_eomt = true; |
350 | msg->have_eomt = true; |
355 | 351 | ||
356 | /* copy the bytes for the remainder of this header chunk */ |
352 | /* copy the bytes for the remainder of this header chunk */ |
357 | msg->curchunk_idx = min(msg->curchunk_len, (u8)(replybuflen - hdrlen)); |
353 | msg->curchunk_idx = min(msg->curchunk_len, (u8)(replybuflen - hdrlen)); |
358 | memcpy(&msg->chunk[0], replybuf + hdrlen, msg->curchunk_idx); |
354 | memcpy(&msg->chunk[0], replybuf + hdrlen, msg->curchunk_idx); |
359 | } else { |
355 | } else { |
360 | memcpy(&msg->chunk[msg->curchunk_idx], replybuf, replybuflen); |
356 | memcpy(&msg->chunk[msg->curchunk_idx], replybuf, replybuflen); |
361 | msg->curchunk_idx += replybuflen; |
357 | msg->curchunk_idx += replybuflen; |
362 | } |
358 | } |
363 | 359 | ||
364 | if (msg->curchunk_idx >= msg->curchunk_len) { |
360 | if (msg->curchunk_idx >= msg->curchunk_len) { |
365 | /* do CRC */ |
361 | /* do CRC */ |
366 | crc4 = drm_dp_msg_data_crc4(msg->chunk, msg->curchunk_len - 1); |
362 | crc4 = drm_dp_msg_data_crc4(msg->chunk, msg->curchunk_len - 1); |
367 | /* copy chunk into bigger msg */ |
363 | /* copy chunk into bigger msg */ |
368 | memcpy(&msg->msg[msg->curlen], msg->chunk, msg->curchunk_len - 1); |
364 | memcpy(&msg->msg[msg->curlen], msg->chunk, msg->curchunk_len - 1); |
369 | msg->curlen += msg->curchunk_len - 1; |
365 | msg->curlen += msg->curchunk_len - 1; |
370 | } |
366 | } |
371 | return true; |
367 | return true; |
372 | } |
368 | } |
373 | 369 | ||
374 | static bool drm_dp_sideband_parse_link_address(struct drm_dp_sideband_msg_rx *raw, |
370 | static bool drm_dp_sideband_parse_link_address(struct drm_dp_sideband_msg_rx *raw, |
375 | struct drm_dp_sideband_msg_reply_body *repmsg) |
371 | struct drm_dp_sideband_msg_reply_body *repmsg) |
376 | { |
372 | { |
377 | int idx = 1; |
373 | int idx = 1; |
378 | int i; |
374 | int i; |
379 | memcpy(repmsg->u.link_addr.guid, &raw->msg[idx], 16); |
375 | memcpy(repmsg->u.link_addr.guid, &raw->msg[idx], 16); |
380 | idx += 16; |
376 | idx += 16; |
381 | repmsg->u.link_addr.nports = raw->msg[idx] & 0xf; |
377 | repmsg->u.link_addr.nports = raw->msg[idx] & 0xf; |
382 | idx++; |
378 | idx++; |
383 | if (idx > raw->curlen) |
379 | if (idx > raw->curlen) |
384 | goto fail_len; |
380 | goto fail_len; |
385 | for (i = 0; i < repmsg->u.link_addr.nports; i++) { |
381 | for (i = 0; i < repmsg->u.link_addr.nports; i++) { |
386 | if (raw->msg[idx] & 0x80) |
382 | if (raw->msg[idx] & 0x80) |
387 | repmsg->u.link_addr.ports[i].input_port = 1; |
383 | repmsg->u.link_addr.ports[i].input_port = 1; |
388 | 384 | ||
389 | repmsg->u.link_addr.ports[i].peer_device_type = (raw->msg[idx] >> 4) & 0x7; |
385 | repmsg->u.link_addr.ports[i].peer_device_type = (raw->msg[idx] >> 4) & 0x7; |
390 | repmsg->u.link_addr.ports[i].port_number = (raw->msg[idx] & 0xf); |
386 | repmsg->u.link_addr.ports[i].port_number = (raw->msg[idx] & 0xf); |
391 | 387 | ||
392 | idx++; |
388 | idx++; |
393 | if (idx > raw->curlen) |
389 | if (idx > raw->curlen) |
394 | goto fail_len; |
390 | goto fail_len; |
395 | repmsg->u.link_addr.ports[i].mcs = (raw->msg[idx] >> 7) & 0x1; |
391 | repmsg->u.link_addr.ports[i].mcs = (raw->msg[idx] >> 7) & 0x1; |
396 | repmsg->u.link_addr.ports[i].ddps = (raw->msg[idx] >> 6) & 0x1; |
392 | repmsg->u.link_addr.ports[i].ddps = (raw->msg[idx] >> 6) & 0x1; |
397 | if (repmsg->u.link_addr.ports[i].input_port == 0) |
393 | if (repmsg->u.link_addr.ports[i].input_port == 0) |
398 | repmsg->u.link_addr.ports[i].legacy_device_plug_status = (raw->msg[idx] >> 5) & 0x1; |
394 | repmsg->u.link_addr.ports[i].legacy_device_plug_status = (raw->msg[idx] >> 5) & 0x1; |
399 | idx++; |
395 | idx++; |
400 | if (idx > raw->curlen) |
396 | if (idx > raw->curlen) |
401 | goto fail_len; |
397 | goto fail_len; |
402 | if (repmsg->u.link_addr.ports[i].input_port == 0) { |
398 | if (repmsg->u.link_addr.ports[i].input_port == 0) { |
403 | repmsg->u.link_addr.ports[i].dpcd_revision = (raw->msg[idx]); |
399 | repmsg->u.link_addr.ports[i].dpcd_revision = (raw->msg[idx]); |
404 | idx++; |
400 | idx++; |
405 | if (idx > raw->curlen) |
401 | if (idx > raw->curlen) |
406 | goto fail_len; |
402 | goto fail_len; |
407 | memcpy(repmsg->u.link_addr.ports[i].peer_guid, &raw->msg[idx], 16); |
403 | memcpy(repmsg->u.link_addr.ports[i].peer_guid, &raw->msg[idx], 16); |
408 | idx += 16; |
404 | idx += 16; |
409 | if (idx > raw->curlen) |
405 | if (idx > raw->curlen) |
410 | goto fail_len; |
406 | goto fail_len; |
411 | repmsg->u.link_addr.ports[i].num_sdp_streams = (raw->msg[idx] >> 4) & 0xf; |
407 | repmsg->u.link_addr.ports[i].num_sdp_streams = (raw->msg[idx] >> 4) & 0xf; |
412 | repmsg->u.link_addr.ports[i].num_sdp_stream_sinks = (raw->msg[idx] & 0xf); |
408 | repmsg->u.link_addr.ports[i].num_sdp_stream_sinks = (raw->msg[idx] & 0xf); |
413 | idx++; |
409 | idx++; |
414 | 410 | ||
415 | } |
411 | } |
416 | if (idx > raw->curlen) |
412 | if (idx > raw->curlen) |
417 | goto fail_len; |
413 | goto fail_len; |
418 | } |
414 | } |
419 | 415 | ||
420 | return true; |
416 | return true; |
421 | fail_len: |
417 | fail_len: |
422 | DRM_DEBUG_KMS("link address reply parse length fail %d %d\n", idx, raw->curlen); |
418 | DRM_DEBUG_KMS("link address reply parse length fail %d %d\n", idx, raw->curlen); |
423 | return false; |
419 | return false; |
424 | } |
420 | } |
425 | 421 | ||
426 | static bool drm_dp_sideband_parse_remote_dpcd_read(struct drm_dp_sideband_msg_rx *raw, |
422 | static bool drm_dp_sideband_parse_remote_dpcd_read(struct drm_dp_sideband_msg_rx *raw, |
427 | struct drm_dp_sideband_msg_reply_body *repmsg) |
423 | struct drm_dp_sideband_msg_reply_body *repmsg) |
428 | { |
424 | { |
429 | int idx = 1; |
425 | int idx = 1; |
430 | repmsg->u.remote_dpcd_read_ack.port_number = raw->msg[idx] & 0xf; |
426 | repmsg->u.remote_dpcd_read_ack.port_number = raw->msg[idx] & 0xf; |
431 | idx++; |
427 | idx++; |
432 | if (idx > raw->curlen) |
428 | if (idx > raw->curlen) |
433 | goto fail_len; |
429 | goto fail_len; |
434 | repmsg->u.remote_dpcd_read_ack.num_bytes = raw->msg[idx]; |
430 | repmsg->u.remote_dpcd_read_ack.num_bytes = raw->msg[idx]; |
435 | if (idx > raw->curlen) |
431 | if (idx > raw->curlen) |
436 | goto fail_len; |
432 | goto fail_len; |
437 | 433 | ||
438 | memcpy(repmsg->u.remote_dpcd_read_ack.bytes, &raw->msg[idx], repmsg->u.remote_dpcd_read_ack.num_bytes); |
434 | memcpy(repmsg->u.remote_dpcd_read_ack.bytes, &raw->msg[idx], repmsg->u.remote_dpcd_read_ack.num_bytes); |
439 | return true; |
435 | return true; |
440 | fail_len: |
436 | fail_len: |
441 | DRM_DEBUG_KMS("link address reply parse length fail %d %d\n", idx, raw->curlen); |
437 | DRM_DEBUG_KMS("link address reply parse length fail %d %d\n", idx, raw->curlen); |
442 | return false; |
438 | return false; |
443 | } |
439 | } |
444 | 440 | ||
445 | static bool drm_dp_sideband_parse_remote_dpcd_write(struct drm_dp_sideband_msg_rx *raw, |
441 | static bool drm_dp_sideband_parse_remote_dpcd_write(struct drm_dp_sideband_msg_rx *raw, |
446 | struct drm_dp_sideband_msg_reply_body *repmsg) |
442 | struct drm_dp_sideband_msg_reply_body *repmsg) |
447 | { |
443 | { |
448 | int idx = 1; |
444 | int idx = 1; |
449 | repmsg->u.remote_dpcd_write_ack.port_number = raw->msg[idx] & 0xf; |
445 | repmsg->u.remote_dpcd_write_ack.port_number = raw->msg[idx] & 0xf; |
450 | idx++; |
446 | idx++; |
451 | if (idx > raw->curlen) |
447 | if (idx > raw->curlen) |
452 | goto fail_len; |
448 | goto fail_len; |
453 | return true; |
449 | return true; |
454 | fail_len: |
450 | fail_len: |
455 | DRM_DEBUG_KMS("parse length fail %d %d\n", idx, raw->curlen); |
451 | DRM_DEBUG_KMS("parse length fail %d %d\n", idx, raw->curlen); |
456 | return false; |
452 | return false; |
457 | } |
453 | } |
458 | 454 | ||
459 | static bool drm_dp_sideband_parse_remote_i2c_read_ack(struct drm_dp_sideband_msg_rx *raw, |
455 | static bool drm_dp_sideband_parse_remote_i2c_read_ack(struct drm_dp_sideband_msg_rx *raw, |
460 | struct drm_dp_sideband_msg_reply_body *repmsg) |
456 | struct drm_dp_sideband_msg_reply_body *repmsg) |
461 | { |
457 | { |
462 | int idx = 1; |
458 | int idx = 1; |
463 | 459 | ||
464 | repmsg->u.remote_i2c_read_ack.port_number = (raw->msg[idx] & 0xf); |
460 | repmsg->u.remote_i2c_read_ack.port_number = (raw->msg[idx] & 0xf); |
465 | idx++; |
461 | idx++; |
466 | if (idx > raw->curlen) |
462 | if (idx > raw->curlen) |
467 | goto fail_len; |
463 | goto fail_len; |
468 | repmsg->u.remote_i2c_read_ack.num_bytes = raw->msg[idx]; |
464 | repmsg->u.remote_i2c_read_ack.num_bytes = raw->msg[idx]; |
469 | idx++; |
465 | idx++; |
470 | /* TODO check */ |
466 | /* TODO check */ |
471 | memcpy(repmsg->u.remote_i2c_read_ack.bytes, &raw->msg[idx], repmsg->u.remote_i2c_read_ack.num_bytes); |
467 | memcpy(repmsg->u.remote_i2c_read_ack.bytes, &raw->msg[idx], repmsg->u.remote_i2c_read_ack.num_bytes); |
472 | return true; |
468 | return true; |
473 | fail_len: |
469 | fail_len: |
474 | DRM_DEBUG_KMS("remote i2c reply parse length fail %d %d\n", idx, raw->curlen); |
470 | DRM_DEBUG_KMS("remote i2c reply parse length fail %d %d\n", idx, raw->curlen); |
475 | return false; |
471 | return false; |
476 | } |
472 | } |
477 | 473 | ||
478 | static bool drm_dp_sideband_parse_enum_path_resources_ack(struct drm_dp_sideband_msg_rx *raw, |
474 | static bool drm_dp_sideband_parse_enum_path_resources_ack(struct drm_dp_sideband_msg_rx *raw, |
479 | struct drm_dp_sideband_msg_reply_body *repmsg) |
475 | struct drm_dp_sideband_msg_reply_body *repmsg) |
480 | { |
476 | { |
481 | int idx = 1; |
477 | int idx = 1; |
482 | repmsg->u.path_resources.port_number = (raw->msg[idx] >> 4) & 0xf; |
478 | repmsg->u.path_resources.port_number = (raw->msg[idx] >> 4) & 0xf; |
483 | idx++; |
479 | idx++; |
484 | if (idx > raw->curlen) |
480 | if (idx > raw->curlen) |
485 | goto fail_len; |
481 | goto fail_len; |
486 | repmsg->u.path_resources.full_payload_bw_number = (raw->msg[idx] << 8) | (raw->msg[idx+1]); |
482 | repmsg->u.path_resources.full_payload_bw_number = (raw->msg[idx] << 8) | (raw->msg[idx+1]); |
487 | idx += 2; |
483 | idx += 2; |
488 | if (idx > raw->curlen) |
484 | if (idx > raw->curlen) |
489 | goto fail_len; |
485 | goto fail_len; |
490 | repmsg->u.path_resources.avail_payload_bw_number = (raw->msg[idx] << 8) | (raw->msg[idx+1]); |
486 | repmsg->u.path_resources.avail_payload_bw_number = (raw->msg[idx] << 8) | (raw->msg[idx+1]); |
491 | idx += 2; |
487 | idx += 2; |
492 | if (idx > raw->curlen) |
488 | if (idx > raw->curlen) |
493 | goto fail_len; |
489 | goto fail_len; |
494 | return true; |
490 | return true; |
495 | fail_len: |
491 | fail_len: |
496 | DRM_DEBUG_KMS("enum resource parse length fail %d %d\n", idx, raw->curlen); |
492 | DRM_DEBUG_KMS("enum resource parse length fail %d %d\n", idx, raw->curlen); |
497 | return false; |
493 | return false; |
498 | } |
494 | } |
499 | 495 | ||
500 | static bool drm_dp_sideband_parse_allocate_payload_ack(struct drm_dp_sideband_msg_rx *raw, |
496 | static bool drm_dp_sideband_parse_allocate_payload_ack(struct drm_dp_sideband_msg_rx *raw, |
501 | struct drm_dp_sideband_msg_reply_body *repmsg) |
497 | struct drm_dp_sideband_msg_reply_body *repmsg) |
502 | { |
498 | { |
503 | int idx = 1; |
499 | int idx = 1; |
504 | repmsg->u.allocate_payload.port_number = (raw->msg[idx] >> 4) & 0xf; |
500 | repmsg->u.allocate_payload.port_number = (raw->msg[idx] >> 4) & 0xf; |
505 | idx++; |
501 | idx++; |
506 | if (idx > raw->curlen) |
502 | if (idx > raw->curlen) |
507 | goto fail_len; |
503 | goto fail_len; |
508 | repmsg->u.allocate_payload.vcpi = raw->msg[idx]; |
504 | repmsg->u.allocate_payload.vcpi = raw->msg[idx]; |
509 | idx++; |
505 | idx++; |
510 | if (idx > raw->curlen) |
506 | if (idx > raw->curlen) |
511 | goto fail_len; |
507 | goto fail_len; |
512 | repmsg->u.allocate_payload.allocated_pbn = (raw->msg[idx] << 8) | (raw->msg[idx+1]); |
508 | repmsg->u.allocate_payload.allocated_pbn = (raw->msg[idx] << 8) | (raw->msg[idx+1]); |
513 | idx += 2; |
509 | idx += 2; |
514 | if (idx > raw->curlen) |
510 | if (idx > raw->curlen) |
515 | goto fail_len; |
511 | goto fail_len; |
516 | return true; |
512 | return true; |
517 | fail_len: |
513 | fail_len: |
518 | DRM_DEBUG_KMS("allocate payload parse length fail %d %d\n", idx, raw->curlen); |
514 | DRM_DEBUG_KMS("allocate payload parse length fail %d %d\n", idx, raw->curlen); |
519 | return false; |
515 | return false; |
520 | } |
516 | } |
521 | 517 | ||
522 | static bool drm_dp_sideband_parse_query_payload_ack(struct drm_dp_sideband_msg_rx *raw, |
518 | static bool drm_dp_sideband_parse_query_payload_ack(struct drm_dp_sideband_msg_rx *raw, |
523 | struct drm_dp_sideband_msg_reply_body *repmsg) |
519 | struct drm_dp_sideband_msg_reply_body *repmsg) |
524 | { |
520 | { |
525 | int idx = 1; |
521 | int idx = 1; |
526 | repmsg->u.query_payload.port_number = (raw->msg[idx] >> 4) & 0xf; |
522 | repmsg->u.query_payload.port_number = (raw->msg[idx] >> 4) & 0xf; |
527 | idx++; |
523 | idx++; |
528 | if (idx > raw->curlen) |
524 | if (idx > raw->curlen) |
529 | goto fail_len; |
525 | goto fail_len; |
530 | repmsg->u.query_payload.allocated_pbn = (raw->msg[idx] << 8) | (raw->msg[idx + 1]); |
526 | repmsg->u.query_payload.allocated_pbn = (raw->msg[idx] << 8) | (raw->msg[idx + 1]); |
531 | idx += 2; |
527 | idx += 2; |
532 | if (idx > raw->curlen) |
528 | if (idx > raw->curlen) |
533 | goto fail_len; |
529 | goto fail_len; |
534 | return true; |
530 | return true; |
535 | fail_len: |
531 | fail_len: |
536 | DRM_DEBUG_KMS("query payload parse length fail %d %d\n", idx, raw->curlen); |
532 | DRM_DEBUG_KMS("query payload parse length fail %d %d\n", idx, raw->curlen); |
537 | return false; |
533 | return false; |
538 | } |
534 | } |
539 | 535 | ||
540 | static bool drm_dp_sideband_parse_reply(struct drm_dp_sideband_msg_rx *raw, |
536 | static bool drm_dp_sideband_parse_reply(struct drm_dp_sideband_msg_rx *raw, |
541 | struct drm_dp_sideband_msg_reply_body *msg) |
537 | struct drm_dp_sideband_msg_reply_body *msg) |
542 | { |
538 | { |
543 | memset(msg, 0, sizeof(*msg)); |
539 | memset(msg, 0, sizeof(*msg)); |
544 | msg->reply_type = (raw->msg[0] & 0x80) >> 7; |
540 | msg->reply_type = (raw->msg[0] & 0x80) >> 7; |
545 | msg->req_type = (raw->msg[0] & 0x7f); |
541 | msg->req_type = (raw->msg[0] & 0x7f); |
546 | 542 | ||
547 | if (msg->reply_type) { |
543 | if (msg->reply_type) { |
548 | memcpy(msg->u.nak.guid, &raw->msg[1], 16); |
544 | memcpy(msg->u.nak.guid, &raw->msg[1], 16); |
549 | msg->u.nak.reason = raw->msg[17]; |
545 | msg->u.nak.reason = raw->msg[17]; |
550 | msg->u.nak.nak_data = raw->msg[18]; |
546 | msg->u.nak.nak_data = raw->msg[18]; |
551 | return false; |
547 | return false; |
552 | } |
548 | } |
553 | 549 | ||
554 | switch (msg->req_type) { |
550 | switch (msg->req_type) { |
555 | case DP_LINK_ADDRESS: |
551 | case DP_LINK_ADDRESS: |
556 | return drm_dp_sideband_parse_link_address(raw, msg); |
552 | return drm_dp_sideband_parse_link_address(raw, msg); |
557 | case DP_QUERY_PAYLOAD: |
553 | case DP_QUERY_PAYLOAD: |
558 | return drm_dp_sideband_parse_query_payload_ack(raw, msg); |
554 | return drm_dp_sideband_parse_query_payload_ack(raw, msg); |
559 | case DP_REMOTE_DPCD_READ: |
555 | case DP_REMOTE_DPCD_READ: |
560 | return drm_dp_sideband_parse_remote_dpcd_read(raw, msg); |
556 | return drm_dp_sideband_parse_remote_dpcd_read(raw, msg); |
561 | case DP_REMOTE_DPCD_WRITE: |
557 | case DP_REMOTE_DPCD_WRITE: |
562 | return drm_dp_sideband_parse_remote_dpcd_write(raw, msg); |
558 | return drm_dp_sideband_parse_remote_dpcd_write(raw, msg); |
563 | case DP_REMOTE_I2C_READ: |
559 | case DP_REMOTE_I2C_READ: |
564 | return drm_dp_sideband_parse_remote_i2c_read_ack(raw, msg); |
560 | return drm_dp_sideband_parse_remote_i2c_read_ack(raw, msg); |
565 | case DP_ENUM_PATH_RESOURCES: |
561 | case DP_ENUM_PATH_RESOURCES: |
566 | return drm_dp_sideband_parse_enum_path_resources_ack(raw, msg); |
562 | return drm_dp_sideband_parse_enum_path_resources_ack(raw, msg); |
567 | case DP_ALLOCATE_PAYLOAD: |
563 | case DP_ALLOCATE_PAYLOAD: |
568 | return drm_dp_sideband_parse_allocate_payload_ack(raw, msg); |
564 | return drm_dp_sideband_parse_allocate_payload_ack(raw, msg); |
569 | default: |
565 | default: |
570 | DRM_ERROR("Got unknown reply 0x%02x\n", msg->req_type); |
566 | DRM_ERROR("Got unknown reply 0x%02x\n", msg->req_type); |
571 | return false; |
567 | return false; |
572 | } |
568 | } |
573 | } |
569 | } |
574 | 570 | ||
575 | static bool drm_dp_sideband_parse_connection_status_notify(struct drm_dp_sideband_msg_rx *raw, |
571 | static bool drm_dp_sideband_parse_connection_status_notify(struct drm_dp_sideband_msg_rx *raw, |
576 | struct drm_dp_sideband_msg_req_body *msg) |
572 | struct drm_dp_sideband_msg_req_body *msg) |
577 | { |
573 | { |
578 | int idx = 1; |
574 | int idx = 1; |
579 | 575 | ||
580 | msg->u.conn_stat.port_number = (raw->msg[idx] & 0xf0) >> 4; |
576 | msg->u.conn_stat.port_number = (raw->msg[idx] & 0xf0) >> 4; |
581 | idx++; |
577 | idx++; |
582 | if (idx > raw->curlen) |
578 | if (idx > raw->curlen) |
583 | goto fail_len; |
579 | goto fail_len; |
584 | 580 | ||
585 | memcpy(msg->u.conn_stat.guid, &raw->msg[idx], 16); |
581 | memcpy(msg->u.conn_stat.guid, &raw->msg[idx], 16); |
586 | idx += 16; |
582 | idx += 16; |
587 | if (idx > raw->curlen) |
583 | if (idx > raw->curlen) |
588 | goto fail_len; |
584 | goto fail_len; |
589 | 585 | ||
590 | msg->u.conn_stat.legacy_device_plug_status = (raw->msg[idx] >> 6) & 0x1; |
586 | msg->u.conn_stat.legacy_device_plug_status = (raw->msg[idx] >> 6) & 0x1; |
591 | msg->u.conn_stat.displayport_device_plug_status = (raw->msg[idx] >> 5) & 0x1; |
587 | msg->u.conn_stat.displayport_device_plug_status = (raw->msg[idx] >> 5) & 0x1; |
592 | msg->u.conn_stat.message_capability_status = (raw->msg[idx] >> 4) & 0x1; |
588 | msg->u.conn_stat.message_capability_status = (raw->msg[idx] >> 4) & 0x1; |
593 | msg->u.conn_stat.input_port = (raw->msg[idx] >> 3) & 0x1; |
589 | msg->u.conn_stat.input_port = (raw->msg[idx] >> 3) & 0x1; |
594 | msg->u.conn_stat.peer_device_type = (raw->msg[idx] & 0x7); |
590 | msg->u.conn_stat.peer_device_type = (raw->msg[idx] & 0x7); |
595 | idx++; |
591 | idx++; |
596 | return true; |
592 | return true; |
597 | fail_len: |
593 | fail_len: |
598 | DRM_DEBUG_KMS("connection status reply parse length fail %d %d\n", idx, raw->curlen); |
594 | DRM_DEBUG_KMS("connection status reply parse length fail %d %d\n", idx, raw->curlen); |
599 | return false; |
595 | return false; |
600 | } |
596 | } |
601 | 597 | ||
602 | static bool drm_dp_sideband_parse_resource_status_notify(struct drm_dp_sideband_msg_rx *raw, |
598 | static bool drm_dp_sideband_parse_resource_status_notify(struct drm_dp_sideband_msg_rx *raw, |
603 | struct drm_dp_sideband_msg_req_body *msg) |
599 | struct drm_dp_sideband_msg_req_body *msg) |
604 | { |
600 | { |
605 | int idx = 1; |
601 | int idx = 1; |
606 | 602 | ||
607 | msg->u.resource_stat.port_number = (raw->msg[idx] & 0xf0) >> 4; |
603 | msg->u.resource_stat.port_number = (raw->msg[idx] & 0xf0) >> 4; |
608 | idx++; |
604 | idx++; |
609 | if (idx > raw->curlen) |
605 | if (idx > raw->curlen) |
610 | goto fail_len; |
606 | goto fail_len; |
611 | 607 | ||
612 | memcpy(msg->u.resource_stat.guid, &raw->msg[idx], 16); |
608 | memcpy(msg->u.resource_stat.guid, &raw->msg[idx], 16); |
613 | idx += 16; |
609 | idx += 16; |
614 | if (idx > raw->curlen) |
610 | if (idx > raw->curlen) |
615 | goto fail_len; |
611 | goto fail_len; |
616 | 612 | ||
617 | msg->u.resource_stat.available_pbn = (raw->msg[idx] << 8) | (raw->msg[idx + 1]); |
613 | msg->u.resource_stat.available_pbn = (raw->msg[idx] << 8) | (raw->msg[idx + 1]); |
618 | idx++; |
614 | idx++; |
619 | return true; |
615 | return true; |
620 | fail_len: |
616 | fail_len: |
621 | DRM_DEBUG_KMS("resource status reply parse length fail %d %d\n", idx, raw->curlen); |
617 | DRM_DEBUG_KMS("resource status reply parse length fail %d %d\n", idx, raw->curlen); |
622 | return false; |
618 | return false; |
623 | } |
619 | } |
624 | 620 | ||
625 | static bool drm_dp_sideband_parse_req(struct drm_dp_sideband_msg_rx *raw, |
621 | static bool drm_dp_sideband_parse_req(struct drm_dp_sideband_msg_rx *raw, |
626 | struct drm_dp_sideband_msg_req_body *msg) |
622 | struct drm_dp_sideband_msg_req_body *msg) |
627 | { |
623 | { |
628 | memset(msg, 0, sizeof(*msg)); |
624 | memset(msg, 0, sizeof(*msg)); |
629 | msg->req_type = (raw->msg[0] & 0x7f); |
625 | msg->req_type = (raw->msg[0] & 0x7f); |
630 | 626 | ||
631 | switch (msg->req_type) { |
627 | switch (msg->req_type) { |
632 | case DP_CONNECTION_STATUS_NOTIFY: |
628 | case DP_CONNECTION_STATUS_NOTIFY: |
633 | return drm_dp_sideband_parse_connection_status_notify(raw, msg); |
629 | return drm_dp_sideband_parse_connection_status_notify(raw, msg); |
634 | case DP_RESOURCE_STATUS_NOTIFY: |
630 | case DP_RESOURCE_STATUS_NOTIFY: |
635 | return drm_dp_sideband_parse_resource_status_notify(raw, msg); |
631 | return drm_dp_sideband_parse_resource_status_notify(raw, msg); |
636 | default: |
632 | default: |
637 | DRM_ERROR("Got unknown request 0x%02x\n", msg->req_type); |
633 | DRM_ERROR("Got unknown request 0x%02x\n", msg->req_type); |
638 | return false; |
634 | return false; |
639 | } |
635 | } |
640 | } |
636 | } |
641 | 637 | ||
642 | static int build_dpcd_write(struct drm_dp_sideband_msg_tx *msg, u8 port_num, u32 offset, u8 num_bytes, u8 *bytes) |
638 | static int build_dpcd_write(struct drm_dp_sideband_msg_tx *msg, u8 port_num, u32 offset, u8 num_bytes, u8 *bytes) |
643 | { |
639 | { |
644 | struct drm_dp_sideband_msg_req_body req; |
640 | struct drm_dp_sideband_msg_req_body req; |
645 | 641 | ||
646 | req.req_type = DP_REMOTE_DPCD_WRITE; |
642 | req.req_type = DP_REMOTE_DPCD_WRITE; |
647 | req.u.dpcd_write.port_number = port_num; |
643 | req.u.dpcd_write.port_number = port_num; |
648 | req.u.dpcd_write.dpcd_address = offset; |
644 | req.u.dpcd_write.dpcd_address = offset; |
649 | req.u.dpcd_write.num_bytes = num_bytes; |
645 | req.u.dpcd_write.num_bytes = num_bytes; |
650 | req.u.dpcd_write.bytes = bytes; |
646 | req.u.dpcd_write.bytes = bytes; |
651 | drm_dp_encode_sideband_req(&req, msg); |
647 | drm_dp_encode_sideband_req(&req, msg); |
652 | 648 | ||
653 | return 0; |
649 | return 0; |
654 | } |
650 | } |
655 | 651 | ||
656 | static int build_link_address(struct drm_dp_sideband_msg_tx *msg) |
652 | static int build_link_address(struct drm_dp_sideband_msg_tx *msg) |
657 | { |
653 | { |
658 | struct drm_dp_sideband_msg_req_body req; |
654 | struct drm_dp_sideband_msg_req_body req; |
659 | 655 | ||
660 | req.req_type = DP_LINK_ADDRESS; |
656 | req.req_type = DP_LINK_ADDRESS; |
661 | drm_dp_encode_sideband_req(&req, msg); |
657 | drm_dp_encode_sideband_req(&req, msg); |
662 | return 0; |
658 | return 0; |
663 | } |
659 | } |
664 | 660 | ||
665 | static int build_enum_path_resources(struct drm_dp_sideband_msg_tx *msg, int port_num) |
661 | static int build_enum_path_resources(struct drm_dp_sideband_msg_tx *msg, int port_num) |
666 | { |
662 | { |
667 | struct drm_dp_sideband_msg_req_body req; |
663 | struct drm_dp_sideband_msg_req_body req; |
668 | 664 | ||
669 | req.req_type = DP_ENUM_PATH_RESOURCES; |
665 | req.req_type = DP_ENUM_PATH_RESOURCES; |
670 | req.u.port_num.port_number = port_num; |
666 | req.u.port_num.port_number = port_num; |
671 | drm_dp_encode_sideband_req(&req, msg); |
667 | drm_dp_encode_sideband_req(&req, msg); |
672 | msg->path_msg = true; |
668 | msg->path_msg = true; |
673 | return 0; |
669 | return 0; |
674 | } |
670 | } |
675 | 671 | ||
676 | static int build_allocate_payload(struct drm_dp_sideband_msg_tx *msg, int port_num, |
672 | static int build_allocate_payload(struct drm_dp_sideband_msg_tx *msg, int port_num, |
677 | u8 vcpi, uint16_t pbn) |
673 | u8 vcpi, uint16_t pbn, |
- | 674 | u8 number_sdp_streams, |
|
- | 675 | u8 *sdp_stream_sink) |
|
678 | { |
676 | { |
679 | struct drm_dp_sideband_msg_req_body req; |
677 | struct drm_dp_sideband_msg_req_body req; |
680 | memset(&req, 0, sizeof(req)); |
678 | memset(&req, 0, sizeof(req)); |
681 | req.req_type = DP_ALLOCATE_PAYLOAD; |
679 | req.req_type = DP_ALLOCATE_PAYLOAD; |
682 | req.u.allocate_payload.port_number = port_num; |
680 | req.u.allocate_payload.port_number = port_num; |
683 | req.u.allocate_payload.vcpi = vcpi; |
681 | req.u.allocate_payload.vcpi = vcpi; |
684 | req.u.allocate_payload.pbn = pbn; |
682 | req.u.allocate_payload.pbn = pbn; |
- | 683 | req.u.allocate_payload.number_sdp_streams = number_sdp_streams; |
|
- | 684 | memcpy(req.u.allocate_payload.sdp_stream_sink, sdp_stream_sink, |
|
- | 685 | number_sdp_streams); |
|
685 | drm_dp_encode_sideband_req(&req, msg); |
686 | drm_dp_encode_sideband_req(&req, msg); |
686 | msg->path_msg = true; |
687 | msg->path_msg = true; |
687 | return 0; |
688 | return 0; |
688 | } |
689 | } |
689 | 690 | ||
690 | static int drm_dp_mst_assign_payload_id(struct drm_dp_mst_topology_mgr *mgr, |
691 | static int drm_dp_mst_assign_payload_id(struct drm_dp_mst_topology_mgr *mgr, |
691 | struct drm_dp_vcpi *vcpi) |
692 | struct drm_dp_vcpi *vcpi) |
692 | { |
693 | { |
693 | int ret, vcpi_ret; |
694 | int ret, vcpi_ret; |
694 | 695 | ||
695 | mutex_lock(&mgr->payload_lock); |
696 | mutex_lock(&mgr->payload_lock); |
696 | ret = find_first_zero_bit(&mgr->payload_mask, mgr->max_payloads + 1); |
697 | ret = find_first_zero_bit(&mgr->payload_mask, mgr->max_payloads + 1); |
697 | if (ret > mgr->max_payloads) { |
698 | if (ret > mgr->max_payloads) { |
698 | ret = -EINVAL; |
699 | ret = -EINVAL; |
699 | DRM_DEBUG_KMS("out of payload ids %d\n", ret); |
700 | DRM_DEBUG_KMS("out of payload ids %d\n", ret); |
700 | goto out_unlock; |
701 | goto out_unlock; |
701 | } |
702 | } |
702 | 703 | ||
703 | vcpi_ret = find_first_zero_bit(&mgr->vcpi_mask, mgr->max_payloads + 1); |
704 | vcpi_ret = find_first_zero_bit(&mgr->vcpi_mask, mgr->max_payloads + 1); |
704 | if (vcpi_ret > mgr->max_payloads) { |
705 | if (vcpi_ret > mgr->max_payloads) { |
705 | ret = -EINVAL; |
706 | ret = -EINVAL; |
706 | DRM_DEBUG_KMS("out of vcpi ids %d\n", ret); |
707 | DRM_DEBUG_KMS("out of vcpi ids %d\n", ret); |
707 | goto out_unlock; |
708 | goto out_unlock; |
708 | } |
709 | } |
709 | 710 | ||
710 | set_bit(ret, &mgr->payload_mask); |
711 | set_bit(ret, &mgr->payload_mask); |
711 | set_bit(vcpi_ret, &mgr->vcpi_mask); |
712 | set_bit(vcpi_ret, &mgr->vcpi_mask); |
712 | vcpi->vcpi = vcpi_ret + 1; |
713 | vcpi->vcpi = vcpi_ret + 1; |
713 | mgr->proposed_vcpis[ret - 1] = vcpi; |
714 | mgr->proposed_vcpis[ret - 1] = vcpi; |
714 | out_unlock: |
715 | out_unlock: |
715 | mutex_unlock(&mgr->payload_lock); |
716 | mutex_unlock(&mgr->payload_lock); |
716 | return ret; |
717 | return ret; |
717 | } |
718 | } |
718 | 719 | ||
719 | static void drm_dp_mst_put_payload_id(struct drm_dp_mst_topology_mgr *mgr, |
720 | static void drm_dp_mst_put_payload_id(struct drm_dp_mst_topology_mgr *mgr, |
720 | int vcpi) |
721 | int vcpi) |
721 | { |
722 | { |
722 | int i; |
723 | int i; |
723 | if (vcpi == 0) |
724 | if (vcpi == 0) |
724 | return; |
725 | return; |
725 | 726 | ||
726 | mutex_lock(&mgr->payload_lock); |
727 | mutex_lock(&mgr->payload_lock); |
727 | DRM_DEBUG_KMS("putting payload %d\n", vcpi); |
728 | DRM_DEBUG_KMS("putting payload %d\n", vcpi); |
728 | clear_bit(vcpi - 1, &mgr->vcpi_mask); |
729 | clear_bit(vcpi - 1, &mgr->vcpi_mask); |
729 | 730 | ||
730 | for (i = 0; i < mgr->max_payloads; i++) { |
731 | for (i = 0; i < mgr->max_payloads; i++) { |
731 | if (mgr->proposed_vcpis[i]) |
732 | if (mgr->proposed_vcpis[i]) |
732 | if (mgr->proposed_vcpis[i]->vcpi == vcpi) { |
733 | if (mgr->proposed_vcpis[i]->vcpi == vcpi) { |
733 | mgr->proposed_vcpis[i] = NULL; |
734 | mgr->proposed_vcpis[i] = NULL; |
734 | clear_bit(i + 1, &mgr->payload_mask); |
735 | clear_bit(i + 1, &mgr->payload_mask); |
735 | } |
736 | } |
736 | } |
737 | } |
737 | mutex_unlock(&mgr->payload_lock); |
738 | mutex_unlock(&mgr->payload_lock); |
738 | } |
739 | } |
739 | 740 | ||
740 | static bool check_txmsg_state(struct drm_dp_mst_topology_mgr *mgr, |
741 | static bool check_txmsg_state(struct drm_dp_mst_topology_mgr *mgr, |
741 | struct drm_dp_sideband_msg_tx *txmsg) |
742 | struct drm_dp_sideband_msg_tx *txmsg) |
742 | { |
743 | { |
743 | bool ret; |
744 | bool ret; |
744 | 745 | ||
745 | /* |
746 | /* |
746 | * All updates to txmsg->state are protected by mgr->qlock, and the two |
747 | * All updates to txmsg->state are protected by mgr->qlock, and the two |
747 | * cases we check here are terminal states. For those the barriers |
748 | * cases we check here are terminal states. For those the barriers |
748 | * provided by the wake_up/wait_event pair are enough. |
749 | * provided by the wake_up/wait_event pair are enough. |
749 | */ |
750 | */ |
750 | ret = (txmsg->state == DRM_DP_SIDEBAND_TX_RX || |
751 | ret = (txmsg->state == DRM_DP_SIDEBAND_TX_RX || |
751 | txmsg->state == DRM_DP_SIDEBAND_TX_TIMEOUT); |
752 | txmsg->state == DRM_DP_SIDEBAND_TX_TIMEOUT); |
752 | return ret; |
753 | return ret; |
753 | } |
754 | } |
754 | 755 | ||
755 | static int drm_dp_mst_wait_tx_reply(struct drm_dp_mst_branch *mstb, |
756 | static int drm_dp_mst_wait_tx_reply(struct drm_dp_mst_branch *mstb, |
756 | struct drm_dp_sideband_msg_tx *txmsg) |
757 | struct drm_dp_sideband_msg_tx *txmsg) |
757 | { |
758 | { |
758 | struct drm_dp_mst_topology_mgr *mgr = mstb->mgr; |
759 | struct drm_dp_mst_topology_mgr *mgr = mstb->mgr; |
759 | int ret; |
760 | int ret; |
760 | 761 | ||
761 | ret = wait_event_timeout(mgr->tx_waitq, |
762 | ret = wait_event_timeout(mgr->tx_waitq, |
762 | check_txmsg_state(mgr, txmsg), |
763 | check_txmsg_state(mgr, txmsg), |
763 | (4 * HZ)); |
764 | (4 * HZ)); |
764 | mutex_lock(&mstb->mgr->qlock); |
765 | mutex_lock(&mstb->mgr->qlock); |
765 | if (ret > 0) { |
766 | if (ret > 0) { |
766 | if (txmsg->state == DRM_DP_SIDEBAND_TX_TIMEOUT) { |
767 | if (txmsg->state == DRM_DP_SIDEBAND_TX_TIMEOUT) { |
767 | ret = -EIO; |
768 | ret = -EIO; |
768 | goto out; |
769 | goto out; |
769 | } |
770 | } |
770 | } else { |
771 | } else { |
771 | DRM_DEBUG_KMS("timedout msg send %p %d %d\n", txmsg, txmsg->state, txmsg->seqno); |
772 | DRM_DEBUG_KMS("timedout msg send %p %d %d\n", txmsg, txmsg->state, txmsg->seqno); |
772 | 773 | ||
773 | /* dump some state */ |
774 | /* dump some state */ |
774 | ret = -EIO; |
775 | ret = -EIO; |
775 | 776 | ||
776 | /* remove from q */ |
777 | /* remove from q */ |
777 | if (txmsg->state == DRM_DP_SIDEBAND_TX_QUEUED || |
778 | if (txmsg->state == DRM_DP_SIDEBAND_TX_QUEUED || |
778 | txmsg->state == DRM_DP_SIDEBAND_TX_START_SEND) { |
779 | txmsg->state == DRM_DP_SIDEBAND_TX_START_SEND) { |
779 | list_del(&txmsg->next); |
780 | list_del(&txmsg->next); |
780 | } |
781 | } |
781 | 782 | ||
782 | if (txmsg->state == DRM_DP_SIDEBAND_TX_START_SEND || |
783 | if (txmsg->state == DRM_DP_SIDEBAND_TX_START_SEND || |
783 | txmsg->state == DRM_DP_SIDEBAND_TX_SENT) { |
784 | txmsg->state == DRM_DP_SIDEBAND_TX_SENT) { |
784 | mstb->tx_slots[txmsg->seqno] = NULL; |
785 | mstb->tx_slots[txmsg->seqno] = NULL; |
785 | } |
786 | } |
786 | } |
787 | } |
787 | out: |
788 | out: |
788 | mutex_unlock(&mgr->qlock); |
789 | mutex_unlock(&mgr->qlock); |
789 | 790 | ||
790 | return ret; |
791 | return ret; |
791 | } |
792 | } |
792 | 793 | ||
793 | static struct drm_dp_mst_branch *drm_dp_add_mst_branch_device(u8 lct, u8 *rad) |
794 | static struct drm_dp_mst_branch *drm_dp_add_mst_branch_device(u8 lct, u8 *rad) |
794 | { |
795 | { |
795 | struct drm_dp_mst_branch *mstb; |
796 | struct drm_dp_mst_branch *mstb; |
796 | 797 | ||
797 | mstb = kzalloc(sizeof(*mstb), GFP_KERNEL); |
798 | mstb = kzalloc(sizeof(*mstb), GFP_KERNEL); |
798 | if (!mstb) |
799 | if (!mstb) |
799 | return NULL; |
800 | return NULL; |
800 | 801 | ||
801 | mstb->lct = lct; |
802 | mstb->lct = lct; |
802 | if (lct > 1) |
803 | if (lct > 1) |
803 | memcpy(mstb->rad, rad, lct / 2); |
804 | memcpy(mstb->rad, rad, lct / 2); |
804 | INIT_LIST_HEAD(&mstb->ports); |
805 | INIT_LIST_HEAD(&mstb->ports); |
805 | kref_init(&mstb->kref); |
806 | kref_init(&mstb->kref); |
806 | return mstb; |
807 | return mstb; |
807 | } |
808 | } |
808 | 809 | ||
809 | static void drm_dp_free_mst_port(struct kref *kref); |
810 | static void drm_dp_free_mst_port(struct kref *kref); |
810 | 811 | ||
811 | static void drm_dp_free_mst_branch_device(struct kref *kref) |
812 | static void drm_dp_free_mst_branch_device(struct kref *kref) |
812 | { |
813 | { |
813 | struct drm_dp_mst_branch *mstb = container_of(kref, struct drm_dp_mst_branch, kref); |
814 | struct drm_dp_mst_branch *mstb = container_of(kref, struct drm_dp_mst_branch, kref); |
814 | if (mstb->port_parent) { |
815 | if (mstb->port_parent) { |
815 | if (list_empty(&mstb->port_parent->next)) |
816 | if (list_empty(&mstb->port_parent->next)) |
816 | kref_put(&mstb->port_parent->kref, drm_dp_free_mst_port); |
817 | kref_put(&mstb->port_parent->kref, drm_dp_free_mst_port); |
817 | } |
818 | } |
818 | kfree(mstb); |
819 | kfree(mstb); |
819 | } |
820 | } |
820 | 821 | ||
821 | static void drm_dp_destroy_mst_branch_device(struct kref *kref) |
822 | static void drm_dp_destroy_mst_branch_device(struct kref *kref) |
822 | { |
823 | { |
823 | struct drm_dp_mst_branch *mstb = container_of(kref, struct drm_dp_mst_branch, kref); |
824 | struct drm_dp_mst_branch *mstb = container_of(kref, struct drm_dp_mst_branch, kref); |
824 | struct drm_dp_mst_port *port, *tmp; |
825 | struct drm_dp_mst_port *port, *tmp; |
825 | bool wake_tx = false; |
826 | bool wake_tx = false; |
826 | 827 | ||
827 | /* |
828 | /* |
828 | * init kref again to be used by ports to remove mst branch when it is |
829 | * init kref again to be used by ports to remove mst branch when it is |
829 | * not needed anymore |
830 | * not needed anymore |
830 | */ |
831 | */ |
831 | kref_init(kref); |
832 | kref_init(kref); |
832 | 833 | ||
833 | if (mstb->port_parent && list_empty(&mstb->port_parent->next)) |
834 | if (mstb->port_parent && list_empty(&mstb->port_parent->next)) |
834 | kref_get(&mstb->port_parent->kref); |
835 | kref_get(&mstb->port_parent->kref); |
835 | 836 | ||
836 | /* |
837 | /* |
837 | * destroy all ports - don't need lock |
838 | * destroy all ports - don't need lock |
838 | * as there are no more references to the mst branch |
839 | * as there are no more references to the mst branch |
839 | * device at this point. |
840 | * device at this point. |
840 | */ |
841 | */ |
841 | list_for_each_entry_safe(port, tmp, &mstb->ports, next) { |
842 | list_for_each_entry_safe(port, tmp, &mstb->ports, next) { |
842 | list_del(&port->next); |
843 | list_del(&port->next); |
843 | drm_dp_put_port(port); |
844 | drm_dp_put_port(port); |
844 | } |
845 | } |
845 | 846 | ||
846 | /* drop any tx slots msg */ |
847 | /* drop any tx slots msg */ |
847 | mutex_lock(&mstb->mgr->qlock); |
848 | mutex_lock(&mstb->mgr->qlock); |
848 | if (mstb->tx_slots[0]) { |
849 | if (mstb->tx_slots[0]) { |
849 | mstb->tx_slots[0]->state = DRM_DP_SIDEBAND_TX_TIMEOUT; |
850 | mstb->tx_slots[0]->state = DRM_DP_SIDEBAND_TX_TIMEOUT; |
850 | mstb->tx_slots[0] = NULL; |
851 | mstb->tx_slots[0] = NULL; |
851 | wake_tx = true; |
852 | wake_tx = true; |
852 | } |
853 | } |
853 | if (mstb->tx_slots[1]) { |
854 | if (mstb->tx_slots[1]) { |
854 | mstb->tx_slots[1]->state = DRM_DP_SIDEBAND_TX_TIMEOUT; |
855 | mstb->tx_slots[1]->state = DRM_DP_SIDEBAND_TX_TIMEOUT; |
855 | mstb->tx_slots[1] = NULL; |
856 | mstb->tx_slots[1] = NULL; |
856 | wake_tx = true; |
857 | wake_tx = true; |
857 | } |
858 | } |
858 | mutex_unlock(&mstb->mgr->qlock); |
859 | mutex_unlock(&mstb->mgr->qlock); |
859 | 860 | ||
860 | // if (wake_tx) |
861 | // if (wake_tx) |
861 | // wake_up(&mstb->mgr->tx_waitq); |
862 | // wake_up(&mstb->mgr->tx_waitq); |
862 | kref_put(kref, drm_dp_free_mst_branch_device); |
863 | kref_put(kref, drm_dp_free_mst_branch_device); |
863 | } |
864 | } |
864 | 865 | ||
865 | static void drm_dp_put_mst_branch_device(struct drm_dp_mst_branch *mstb) |
866 | static void drm_dp_put_mst_branch_device(struct drm_dp_mst_branch *mstb) |
866 | { |
867 | { |
867 | kref_put(&mstb->kref, drm_dp_destroy_mst_branch_device); |
868 | kref_put(&mstb->kref, drm_dp_destroy_mst_branch_device); |
868 | } |
869 | } |
869 | 870 | ||
870 | 871 | ||
871 | static void drm_dp_port_teardown_pdt(struct drm_dp_mst_port *port, int old_pdt) |
872 | static void drm_dp_port_teardown_pdt(struct drm_dp_mst_port *port, int old_pdt) |
872 | { |
873 | { |
873 | struct drm_dp_mst_branch *mstb; |
874 | struct drm_dp_mst_branch *mstb; |
874 | 875 | ||
875 | switch (old_pdt) { |
876 | switch (old_pdt) { |
876 | case DP_PEER_DEVICE_DP_LEGACY_CONV: |
877 | case DP_PEER_DEVICE_DP_LEGACY_CONV: |
877 | case DP_PEER_DEVICE_SST_SINK: |
878 | case DP_PEER_DEVICE_SST_SINK: |
878 | /* remove i2c over sideband */ |
879 | /* remove i2c over sideband */ |
879 | drm_dp_mst_unregister_i2c_bus(&port->aux); |
880 | drm_dp_mst_unregister_i2c_bus(&port->aux); |
880 | break; |
881 | break; |
881 | case DP_PEER_DEVICE_MST_BRANCHING: |
882 | case DP_PEER_DEVICE_MST_BRANCHING: |
882 | mstb = port->mstb; |
883 | mstb = port->mstb; |
883 | port->mstb = NULL; |
884 | port->mstb = NULL; |
884 | drm_dp_put_mst_branch_device(mstb); |
885 | drm_dp_put_mst_branch_device(mstb); |
885 | break; |
886 | break; |
886 | } |
887 | } |
887 | } |
888 | } |
888 | 889 | ||
889 | static void drm_dp_destroy_port(struct kref *kref) |
890 | static void drm_dp_destroy_port(struct kref *kref) |
890 | { |
891 | { |
891 | struct drm_dp_mst_port *port = container_of(kref, struct drm_dp_mst_port, kref); |
892 | struct drm_dp_mst_port *port = container_of(kref, struct drm_dp_mst_port, kref); |
892 | struct drm_dp_mst_topology_mgr *mgr = port->mgr; |
893 | struct drm_dp_mst_topology_mgr *mgr = port->mgr; |
893 | 894 | ||
894 | if (!port->input) { |
895 | if (!port->input) { |
895 | port->vcpi.num_slots = 0; |
896 | port->vcpi.num_slots = 0; |
896 | 897 | ||
897 | kfree(port->cached_edid); |
898 | kfree(port->cached_edid); |
898 | 899 | ||
899 | /* |
900 | /* |
900 | * The only time we don't have a connector |
901 | * The only time we don't have a connector |
901 | * on an output port is if the connector init |
902 | * on an output port is if the connector init |
902 | * fails. |
903 | * fails. |
903 | */ |
904 | */ |
904 | if (port->connector) { |
905 | if (port->connector) { |
905 | /* we can't destroy the connector here, as |
906 | /* we can't destroy the connector here, as |
906 | * we might be holding the mode_config.mutex |
907 | * we might be holding the mode_config.mutex |
907 | * from an EDID retrieval */ |
908 | * from an EDID retrieval */ |
908 | 909 | ||
909 | mutex_lock(&mgr->destroy_connector_lock); |
910 | mutex_lock(&mgr->destroy_connector_lock); |
910 | kref_get(&port->parent->kref); |
911 | kref_get(&port->parent->kref); |
911 | list_add(&port->next, &mgr->destroy_connector_list); |
912 | list_add(&port->next, &mgr->destroy_connector_list); |
912 | mutex_unlock(&mgr->destroy_connector_lock); |
913 | mutex_unlock(&mgr->destroy_connector_lock); |
913 | // schedule_work(&mgr->destroy_connector_work); |
914 | // schedule_work(&mgr->destroy_connector_work); |
914 | return; |
915 | return; |
915 | } |
916 | } |
916 | /* no need to clean up vcpi |
917 | /* no need to clean up vcpi |
917 | * as if we have no connector we never setup a vcpi */ |
918 | * as if we have no connector we never setup a vcpi */ |
918 | drm_dp_port_teardown_pdt(port, port->pdt); |
919 | drm_dp_port_teardown_pdt(port, port->pdt); |
919 | port->pdt = DP_PEER_DEVICE_NONE; |
- | |
920 | } |
920 | } |
921 | kfree(port); |
921 | kfree(port); |
922 | } |
922 | } |
923 | 923 | ||
924 | static void drm_dp_put_port(struct drm_dp_mst_port *port) |
924 | static void drm_dp_put_port(struct drm_dp_mst_port *port) |
925 | { |
925 | { |
926 | kref_put(&port->kref, drm_dp_destroy_port); |
926 | kref_put(&port->kref, drm_dp_destroy_port); |
927 | } |
927 | } |
928 | 928 | ||
929 | static struct drm_dp_mst_branch *drm_dp_mst_get_validated_mstb_ref_locked(struct drm_dp_mst_branch *mstb, struct drm_dp_mst_branch *to_find) |
929 | static struct drm_dp_mst_branch *drm_dp_mst_get_validated_mstb_ref_locked(struct drm_dp_mst_branch *mstb, struct drm_dp_mst_branch *to_find) |
930 | { |
930 | { |
931 | struct drm_dp_mst_port *port; |
931 | struct drm_dp_mst_port *port; |
932 | struct drm_dp_mst_branch *rmstb; |
932 | struct drm_dp_mst_branch *rmstb; |
933 | if (to_find == mstb) { |
933 | if (to_find == mstb) { |
934 | kref_get(&mstb->kref); |
934 | kref_get(&mstb->kref); |
935 | return mstb; |
935 | return mstb; |
936 | } |
936 | } |
937 | list_for_each_entry(port, &mstb->ports, next) { |
937 | list_for_each_entry(port, &mstb->ports, next) { |
938 | if (port->mstb) { |
938 | if (port->mstb) { |
939 | rmstb = drm_dp_mst_get_validated_mstb_ref_locked(port->mstb, to_find); |
939 | rmstb = drm_dp_mst_get_validated_mstb_ref_locked(port->mstb, to_find); |
940 | if (rmstb) |
940 | if (rmstb) |
941 | return rmstb; |
941 | return rmstb; |
942 | } |
942 | } |
943 | } |
943 | } |
944 | return NULL; |
944 | return NULL; |
945 | } |
945 | } |
946 | 946 | ||
947 | static struct drm_dp_mst_branch *drm_dp_get_validated_mstb_ref(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_branch *mstb) |
947 | static struct drm_dp_mst_branch *drm_dp_get_validated_mstb_ref(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_branch *mstb) |
948 | { |
948 | { |
949 | struct drm_dp_mst_branch *rmstb = NULL; |
949 | struct drm_dp_mst_branch *rmstb = NULL; |
950 | mutex_lock(&mgr->lock); |
950 | mutex_lock(&mgr->lock); |
951 | if (mgr->mst_primary) |
951 | if (mgr->mst_primary) |
952 | rmstb = drm_dp_mst_get_validated_mstb_ref_locked(mgr->mst_primary, mstb); |
952 | rmstb = drm_dp_mst_get_validated_mstb_ref_locked(mgr->mst_primary, mstb); |
953 | mutex_unlock(&mgr->lock); |
953 | mutex_unlock(&mgr->lock); |
954 | return rmstb; |
954 | return rmstb; |
955 | } |
955 | } |
956 | 956 | ||
957 | static struct drm_dp_mst_port *drm_dp_mst_get_port_ref_locked(struct drm_dp_mst_branch *mstb, struct drm_dp_mst_port *to_find) |
957 | static struct drm_dp_mst_port *drm_dp_mst_get_port_ref_locked(struct drm_dp_mst_branch *mstb, struct drm_dp_mst_port *to_find) |
958 | { |
958 | { |
959 | struct drm_dp_mst_port *port, *mport; |
959 | struct drm_dp_mst_port *port, *mport; |
960 | 960 | ||
961 | list_for_each_entry(port, &mstb->ports, next) { |
961 | list_for_each_entry(port, &mstb->ports, next) { |
962 | if (port == to_find) { |
962 | if (port == to_find) { |
963 | kref_get(&port->kref); |
963 | kref_get(&port->kref); |
964 | return port; |
964 | return port; |
965 | } |
965 | } |
966 | if (port->mstb) { |
966 | if (port->mstb) { |
967 | mport = drm_dp_mst_get_port_ref_locked(port->mstb, to_find); |
967 | mport = drm_dp_mst_get_port_ref_locked(port->mstb, to_find); |
968 | if (mport) |
968 | if (mport) |
969 | return mport; |
969 | return mport; |
970 | } |
970 | } |
971 | } |
971 | } |
972 | return NULL; |
972 | return NULL; |
973 | } |
973 | } |
974 | 974 | ||
975 | static struct drm_dp_mst_port *drm_dp_get_validated_port_ref(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
975 | static struct drm_dp_mst_port *drm_dp_get_validated_port_ref(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
976 | { |
976 | { |
977 | struct drm_dp_mst_port *rport = NULL; |
977 | struct drm_dp_mst_port *rport = NULL; |
978 | mutex_lock(&mgr->lock); |
978 | mutex_lock(&mgr->lock); |
979 | if (mgr->mst_primary) |
979 | if (mgr->mst_primary) |
980 | rport = drm_dp_mst_get_port_ref_locked(mgr->mst_primary, port); |
980 | rport = drm_dp_mst_get_port_ref_locked(mgr->mst_primary, port); |
981 | mutex_unlock(&mgr->lock); |
981 | mutex_unlock(&mgr->lock); |
982 | return rport; |
982 | return rport; |
983 | } |
983 | } |
984 | 984 | ||
985 | static struct drm_dp_mst_port *drm_dp_get_port(struct drm_dp_mst_branch *mstb, u8 port_num) |
985 | static struct drm_dp_mst_port *drm_dp_get_port(struct drm_dp_mst_branch *mstb, u8 port_num) |
986 | { |
986 | { |
987 | struct drm_dp_mst_port *port; |
987 | struct drm_dp_mst_port *port; |
988 | 988 | ||
989 | list_for_each_entry(port, &mstb->ports, next) { |
989 | list_for_each_entry(port, &mstb->ports, next) { |
990 | if (port->port_num == port_num) { |
990 | if (port->port_num == port_num) { |
991 | kref_get(&port->kref); |
991 | kref_get(&port->kref); |
992 | return port; |
992 | return port; |
993 | } |
993 | } |
994 | } |
994 | } |
995 | 995 | ||
996 | return NULL; |
996 | return NULL; |
997 | } |
997 | } |
998 | 998 | ||
999 | /* |
999 | /* |
1000 | * calculate a new RAD for this MST branch device |
1000 | * calculate a new RAD for this MST branch device |
1001 | * if parent has an LCT of 2 then it has 1 nibble of RAD, |
1001 | * if parent has an LCT of 2 then it has 1 nibble of RAD, |
1002 | * if parent has an LCT of 3 then it has 2 nibbles of RAD, |
1002 | * if parent has an LCT of 3 then it has 2 nibbles of RAD, |
1003 | */ |
1003 | */ |
1004 | static u8 drm_dp_calculate_rad(struct drm_dp_mst_port *port, |
1004 | static u8 drm_dp_calculate_rad(struct drm_dp_mst_port *port, |
1005 | u8 *rad) |
1005 | u8 *rad) |
1006 | { |
1006 | { |
1007 | int parent_lct = port->parent->lct; |
1007 | int parent_lct = port->parent->lct; |
1008 | int shift = 4; |
1008 | int shift = 4; |
1009 | int idx = (parent_lct - 1) / 2; |
1009 | int idx = (parent_lct - 1) / 2; |
1010 | if (parent_lct > 1) { |
1010 | if (parent_lct > 1) { |
1011 | memcpy(rad, port->parent->rad, idx + 1); |
1011 | memcpy(rad, port->parent->rad, idx + 1); |
1012 | shift = (parent_lct % 2) ? 4 : 0; |
1012 | shift = (parent_lct % 2) ? 4 : 0; |
1013 | } else |
1013 | } else |
1014 | rad[0] = 0; |
1014 | rad[0] = 0; |
1015 | 1015 | ||
1016 | rad[idx] |= port->port_num << shift; |
1016 | rad[idx] |= port->port_num << shift; |
1017 | return parent_lct + 1; |
1017 | return parent_lct + 1; |
1018 | } |
1018 | } |
1019 | 1019 | ||
1020 | /* |
1020 | /* |
1021 | * return sends link address for new mstb |
1021 | * return sends link address for new mstb |
1022 | */ |
1022 | */ |
1023 | static bool drm_dp_port_setup_pdt(struct drm_dp_mst_port *port) |
1023 | static bool drm_dp_port_setup_pdt(struct drm_dp_mst_port *port) |
1024 | { |
1024 | { |
1025 | int ret; |
1025 | int ret; |
1026 | u8 rad[6], lct; |
1026 | u8 rad[6], lct; |
1027 | bool send_link = false; |
1027 | bool send_link = false; |
1028 | switch (port->pdt) { |
1028 | switch (port->pdt) { |
1029 | case DP_PEER_DEVICE_DP_LEGACY_CONV: |
1029 | case DP_PEER_DEVICE_DP_LEGACY_CONV: |
1030 | case DP_PEER_DEVICE_SST_SINK: |
1030 | case DP_PEER_DEVICE_SST_SINK: |
1031 | /* add i2c over sideband */ |
1031 | /* add i2c over sideband */ |
1032 | ret = drm_dp_mst_register_i2c_bus(&port->aux); |
1032 | ret = drm_dp_mst_register_i2c_bus(&port->aux); |
1033 | break; |
1033 | break; |
1034 | case DP_PEER_DEVICE_MST_BRANCHING: |
1034 | case DP_PEER_DEVICE_MST_BRANCHING: |
1035 | lct = drm_dp_calculate_rad(port, rad); |
1035 | lct = drm_dp_calculate_rad(port, rad); |
1036 | 1036 | ||
1037 | port->mstb = drm_dp_add_mst_branch_device(lct, rad); |
1037 | port->mstb = drm_dp_add_mst_branch_device(lct, rad); |
1038 | port->mstb->mgr = port->mgr; |
1038 | port->mstb->mgr = port->mgr; |
1039 | port->mstb->port_parent = port; |
1039 | port->mstb->port_parent = port; |
1040 | 1040 | ||
1041 | send_link = true; |
1041 | send_link = true; |
1042 | break; |
1042 | break; |
1043 | } |
1043 | } |
1044 | return send_link; |
1044 | return send_link; |
1045 | } |
1045 | } |
1046 | 1046 | ||
1047 | static void drm_dp_check_mstb_guid(struct drm_dp_mst_branch *mstb, u8 *guid) |
1047 | static void drm_dp_check_mstb_guid(struct drm_dp_mst_branch *mstb, u8 *guid) |
1048 | { |
1048 | { |
1049 | int ret; |
1049 | int ret; |
1050 | 1050 | ||
1051 | memcpy(mstb->guid, guid, 16); |
1051 | memcpy(mstb->guid, guid, 16); |
1052 | 1052 | ||
1053 | if (!drm_dp_validate_guid(mstb->mgr, mstb->guid)) { |
1053 | if (!drm_dp_validate_guid(mstb->mgr, mstb->guid)) { |
1054 | if (mstb->port_parent) { |
1054 | if (mstb->port_parent) { |
1055 | ret = drm_dp_send_dpcd_write( |
1055 | ret = drm_dp_send_dpcd_write( |
1056 | mstb->mgr, |
1056 | mstb->mgr, |
1057 | mstb->port_parent, |
1057 | mstb->port_parent, |
1058 | DP_GUID, |
1058 | DP_GUID, |
1059 | 16, |
1059 | 16, |
1060 | mstb->guid); |
1060 | mstb->guid); |
1061 | } else { |
1061 | } else { |
1062 | 1062 | ||
1063 | ret = drm_dp_dpcd_write( |
1063 | ret = drm_dp_dpcd_write( |
1064 | mstb->mgr->aux, |
1064 | mstb->mgr->aux, |
1065 | DP_GUID, |
1065 | DP_GUID, |
1066 | mstb->guid, |
1066 | mstb->guid, |
1067 | 16); |
1067 | 16); |
1068 | } |
1068 | } |
1069 | } |
1069 | } |
1070 | } |
1070 | } |
1071 | 1071 | ||
1072 | static void build_mst_prop_path(const struct drm_dp_mst_branch *mstb, |
1072 | static void build_mst_prop_path(const struct drm_dp_mst_branch *mstb, |
1073 | int pnum, |
1073 | int pnum, |
1074 | char *proppath, |
1074 | char *proppath, |
1075 | size_t proppath_size) |
1075 | size_t proppath_size) |
1076 | { |
1076 | { |
1077 | int i; |
1077 | int i; |
1078 | char temp[8]; |
1078 | char temp[8]; |
1079 | snprintf(proppath, proppath_size, "mst:%d", mstb->mgr->conn_base_id); |
1079 | snprintf(proppath, proppath_size, "mst:%d", mstb->mgr->conn_base_id); |
1080 | for (i = 0; i < (mstb->lct - 1); i++) { |
1080 | for (i = 0; i < (mstb->lct - 1); i++) { |
1081 | int shift = (i % 2) ? 0 : 4; |
1081 | int shift = (i % 2) ? 0 : 4; |
1082 | int port_num = (mstb->rad[i / 2] >> shift) & 0xf; |
1082 | int port_num = (mstb->rad[i / 2] >> shift) & 0xf; |
1083 | snprintf(temp, sizeof(temp), "-%d", port_num); |
1083 | snprintf(temp, sizeof(temp), "-%d", port_num); |
1084 | strlcat(proppath, temp, proppath_size); |
1084 | strlcat(proppath, temp, proppath_size); |
1085 | } |
1085 | } |
1086 | snprintf(temp, sizeof(temp), "-%d", pnum); |
1086 | snprintf(temp, sizeof(temp), "-%d", pnum); |
1087 | strlcat(proppath, temp, proppath_size); |
1087 | strlcat(proppath, temp, proppath_size); |
1088 | } |
1088 | } |
1089 | 1089 | ||
1090 | static void drm_dp_add_port(struct drm_dp_mst_branch *mstb, |
1090 | static void drm_dp_add_port(struct drm_dp_mst_branch *mstb, |
1091 | struct device *dev, |
1091 | struct device *dev, |
1092 | struct drm_dp_link_addr_reply_port *port_msg) |
1092 | struct drm_dp_link_addr_reply_port *port_msg) |
1093 | { |
1093 | { |
1094 | struct drm_dp_mst_port *port; |
1094 | struct drm_dp_mst_port *port; |
1095 | bool ret; |
1095 | bool ret; |
1096 | bool created = false; |
1096 | bool created = false; |
1097 | int old_pdt = 0; |
1097 | int old_pdt = 0; |
1098 | int old_ddps = 0; |
1098 | int old_ddps = 0; |
1099 | port = drm_dp_get_port(mstb, port_msg->port_number); |
1099 | port = drm_dp_get_port(mstb, port_msg->port_number); |
1100 | if (!port) { |
1100 | if (!port) { |
1101 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
1101 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
1102 | if (!port) |
1102 | if (!port) |
1103 | return; |
1103 | return; |
1104 | kref_init(&port->kref); |
1104 | kref_init(&port->kref); |
1105 | port->parent = mstb; |
1105 | port->parent = mstb; |
1106 | port->port_num = port_msg->port_number; |
1106 | port->port_num = port_msg->port_number; |
1107 | port->mgr = mstb->mgr; |
1107 | port->mgr = mstb->mgr; |
1108 | port->aux.name = "DPMST"; |
1108 | port->aux.name = "DPMST"; |
1109 | port->aux.dev = dev; |
1109 | port->aux.dev = dev; |
1110 | created = true; |
1110 | created = true; |
1111 | } else { |
1111 | } else { |
1112 | old_pdt = port->pdt; |
1112 | old_pdt = port->pdt; |
1113 | old_ddps = port->ddps; |
1113 | old_ddps = port->ddps; |
1114 | } |
1114 | } |
1115 | 1115 | ||
1116 | port->pdt = port_msg->peer_device_type; |
1116 | port->pdt = port_msg->peer_device_type; |
1117 | port->input = port_msg->input_port; |
1117 | port->input = port_msg->input_port; |
1118 | port->mcs = port_msg->mcs; |
1118 | port->mcs = port_msg->mcs; |
1119 | port->ddps = port_msg->ddps; |
1119 | port->ddps = port_msg->ddps; |
1120 | port->ldps = port_msg->legacy_device_plug_status; |
1120 | port->ldps = port_msg->legacy_device_plug_status; |
1121 | port->dpcd_rev = port_msg->dpcd_revision; |
1121 | port->dpcd_rev = port_msg->dpcd_revision; |
1122 | port->num_sdp_streams = port_msg->num_sdp_streams; |
1122 | port->num_sdp_streams = port_msg->num_sdp_streams; |
1123 | port->num_sdp_stream_sinks = port_msg->num_sdp_stream_sinks; |
1123 | port->num_sdp_stream_sinks = port_msg->num_sdp_stream_sinks; |
1124 | 1124 | ||
1125 | /* manage mstb port lists with mgr lock - take a reference |
1125 | /* manage mstb port lists with mgr lock - take a reference |
1126 | for this list */ |
1126 | for this list */ |
1127 | if (created) { |
1127 | if (created) { |
1128 | mutex_lock(&mstb->mgr->lock); |
1128 | mutex_lock(&mstb->mgr->lock); |
1129 | kref_get(&port->kref); |
1129 | kref_get(&port->kref); |
1130 | list_add(&port->next, &mstb->ports); |
1130 | list_add(&port->next, &mstb->ports); |
1131 | mutex_unlock(&mstb->mgr->lock); |
1131 | mutex_unlock(&mstb->mgr->lock); |
1132 | } |
1132 | } |
1133 | 1133 | ||
1134 | if (old_ddps != port->ddps) { |
1134 | if (old_ddps != port->ddps) { |
1135 | if (port->ddps) { |
1135 | if (port->ddps) { |
1136 | if (!port->input) |
1136 | if (!port->input) |
1137 | drm_dp_send_enum_path_resources(mstb->mgr, mstb, port); |
1137 | drm_dp_send_enum_path_resources(mstb->mgr, mstb, port); |
1138 | } else { |
1138 | } else { |
1139 | port->available_pbn = 0; |
1139 | port->available_pbn = 0; |
1140 | } |
1140 | } |
1141 | } |
1141 | } |
1142 | 1142 | ||
1143 | if (old_pdt != port->pdt && !port->input) { |
1143 | if (old_pdt != port->pdt && !port->input) { |
1144 | drm_dp_port_teardown_pdt(port, old_pdt); |
1144 | drm_dp_port_teardown_pdt(port, old_pdt); |
1145 | 1145 | ||
1146 | ret = drm_dp_port_setup_pdt(port); |
1146 | ret = drm_dp_port_setup_pdt(port); |
1147 | if (ret == true) |
1147 | if (ret == true) |
1148 | drm_dp_send_link_address(mstb->mgr, port->mstb); |
1148 | drm_dp_send_link_address(mstb->mgr, port->mstb); |
1149 | } |
1149 | } |
1150 | 1150 | ||
1151 | if (created && !port->input) { |
1151 | if (created && !port->input) { |
1152 | char proppath[255]; |
1152 | char proppath[255]; |
1153 | 1153 | ||
1154 | build_mst_prop_path(mstb, port->port_num, proppath, sizeof(proppath)); |
1154 | build_mst_prop_path(mstb, port->port_num, proppath, sizeof(proppath)); |
1155 | port->connector = (*mstb->mgr->cbs->add_connector)(mstb->mgr, port, proppath); |
1155 | port->connector = (*mstb->mgr->cbs->add_connector)(mstb->mgr, port, proppath); |
1156 | if (!port->connector) { |
1156 | if (!port->connector) { |
1157 | /* remove it from the port list */ |
1157 | /* remove it from the port list */ |
1158 | mutex_lock(&mstb->mgr->lock); |
1158 | mutex_lock(&mstb->mgr->lock); |
1159 | list_del(&port->next); |
1159 | list_del(&port->next); |
1160 | mutex_unlock(&mstb->mgr->lock); |
1160 | mutex_unlock(&mstb->mgr->lock); |
1161 | /* drop port list reference */ |
1161 | /* drop port list reference */ |
1162 | drm_dp_put_port(port); |
1162 | drm_dp_put_port(port); |
1163 | goto out; |
1163 | goto out; |
1164 | } |
1164 | } |
1165 | if ((port->pdt == DP_PEER_DEVICE_DP_LEGACY_CONV || |
- | |
1166 | port->pdt == DP_PEER_DEVICE_SST_SINK) && |
- | |
1167 | port->port_num >= DP_MST_LOGICAL_PORT_0) { |
1165 | if (port->port_num >= DP_MST_LOGICAL_PORT_0) { |
1168 | port->cached_edid = drm_get_edid(port->connector, &port->aux.ddc); |
1166 | port->cached_edid = drm_get_edid(port->connector, &port->aux.ddc); |
1169 | drm_mode_connector_set_tile_property(port->connector); |
1167 | drm_mode_connector_set_tile_property(port->connector); |
1170 | } |
1168 | } |
1171 | (*mstb->mgr->cbs->register_connector)(port->connector); |
1169 | (*mstb->mgr->cbs->register_connector)(port->connector); |
1172 | } |
1170 | } |
1173 | 1171 | ||
1174 | out: |
1172 | out: |
1175 | /* put reference to this port */ |
1173 | /* put reference to this port */ |
1176 | drm_dp_put_port(port); |
1174 | drm_dp_put_port(port); |
1177 | } |
1175 | } |
1178 | 1176 | ||
1179 | static void drm_dp_update_port(struct drm_dp_mst_branch *mstb, |
1177 | static void drm_dp_update_port(struct drm_dp_mst_branch *mstb, |
1180 | struct drm_dp_connection_status_notify *conn_stat) |
1178 | struct drm_dp_connection_status_notify *conn_stat) |
1181 | { |
1179 | { |
1182 | struct drm_dp_mst_port *port; |
1180 | struct drm_dp_mst_port *port; |
1183 | int old_pdt; |
1181 | int old_pdt; |
1184 | int old_ddps; |
1182 | int old_ddps; |
1185 | bool dowork = false; |
1183 | bool dowork = false; |
1186 | port = drm_dp_get_port(mstb, conn_stat->port_number); |
1184 | port = drm_dp_get_port(mstb, conn_stat->port_number); |
1187 | if (!port) |
1185 | if (!port) |
1188 | return; |
1186 | return; |
1189 | 1187 | ||
1190 | old_ddps = port->ddps; |
1188 | old_ddps = port->ddps; |
1191 | old_pdt = port->pdt; |
1189 | old_pdt = port->pdt; |
1192 | port->pdt = conn_stat->peer_device_type; |
1190 | port->pdt = conn_stat->peer_device_type; |
1193 | port->mcs = conn_stat->message_capability_status; |
1191 | port->mcs = conn_stat->message_capability_status; |
1194 | port->ldps = conn_stat->legacy_device_plug_status; |
1192 | port->ldps = conn_stat->legacy_device_plug_status; |
1195 | port->ddps = conn_stat->displayport_device_plug_status; |
1193 | port->ddps = conn_stat->displayport_device_plug_status; |
1196 | 1194 | ||
1197 | if (old_ddps != port->ddps) { |
1195 | if (old_ddps != port->ddps) { |
1198 | if (port->ddps) { |
1196 | if (port->ddps) { |
1199 | dowork = true; |
1197 | dowork = true; |
1200 | } else { |
1198 | } else { |
1201 | port->available_pbn = 0; |
1199 | port->available_pbn = 0; |
1202 | } |
1200 | } |
1203 | } |
1201 | } |
1204 | if (old_pdt != port->pdt && !port->input) { |
1202 | if (old_pdt != port->pdt && !port->input) { |
1205 | drm_dp_port_teardown_pdt(port, old_pdt); |
1203 | drm_dp_port_teardown_pdt(port, old_pdt); |
1206 | 1204 | ||
1207 | if (drm_dp_port_setup_pdt(port)) |
1205 | if (drm_dp_port_setup_pdt(port)) |
1208 | dowork = true; |
1206 | dowork = true; |
1209 | } |
1207 | } |
1210 | 1208 | ||
1211 | drm_dp_put_port(port); |
1209 | drm_dp_put_port(port); |
1212 | // if (dowork) |
1210 | // if (dowork) |
1213 | // queue_work(system_long_wq, &mstb->mgr->work); |
1211 | // queue_work(system_long_wq, &mstb->mgr->work); |
1214 | 1212 | ||
1215 | } |
1213 | } |
1216 | 1214 | ||
1217 | static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device(struct drm_dp_mst_topology_mgr *mgr, |
1215 | static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device(struct drm_dp_mst_topology_mgr *mgr, |
1218 | u8 lct, u8 *rad) |
1216 | u8 lct, u8 *rad) |
1219 | { |
1217 | { |
1220 | struct drm_dp_mst_branch *mstb; |
1218 | struct drm_dp_mst_branch *mstb; |
1221 | struct drm_dp_mst_port *port; |
1219 | struct drm_dp_mst_port *port; |
1222 | int i; |
1220 | int i; |
1223 | /* find the port by iterating down */ |
1221 | /* find the port by iterating down */ |
1224 | 1222 | ||
1225 | mutex_lock(&mgr->lock); |
1223 | mutex_lock(&mgr->lock); |
1226 | mstb = mgr->mst_primary; |
1224 | mstb = mgr->mst_primary; |
1227 | 1225 | ||
1228 | for (i = 0; i < lct - 1; i++) { |
1226 | for (i = 0; i < lct - 1; i++) { |
1229 | int shift = (i % 2) ? 0 : 4; |
1227 | int shift = (i % 2) ? 0 : 4; |
1230 | int port_num = (rad[i / 2] >> shift) & 0xf; |
1228 | int port_num = (rad[i / 2] >> shift) & 0xf; |
1231 | 1229 | ||
1232 | list_for_each_entry(port, &mstb->ports, next) { |
1230 | list_for_each_entry(port, &mstb->ports, next) { |
1233 | if (port->port_num == port_num) { |
1231 | if (port->port_num == port_num) { |
1234 | mstb = port->mstb; |
1232 | mstb = port->mstb; |
1235 | if (!mstb) { |
1233 | if (!mstb) { |
1236 | DRM_ERROR("failed to lookup MSTB with lct %d, rad %02x\n", lct, rad[0]); |
1234 | DRM_ERROR("failed to lookup MSTB with lct %d, rad %02x\n", lct, rad[0]); |
1237 | goto out; |
1235 | goto out; |
1238 | } |
1236 | } |
1239 | 1237 | ||
1240 | break; |
1238 | break; |
1241 | } |
1239 | } |
1242 | } |
1240 | } |
1243 | } |
1241 | } |
1244 | kref_get(&mstb->kref); |
1242 | kref_get(&mstb->kref); |
1245 | out: |
1243 | out: |
1246 | mutex_unlock(&mgr->lock); |
1244 | mutex_unlock(&mgr->lock); |
1247 | return mstb; |
1245 | return mstb; |
1248 | } |
1246 | } |
1249 | 1247 | ||
1250 | static struct drm_dp_mst_branch *get_mst_branch_device_by_guid_helper( |
1248 | static struct drm_dp_mst_branch *get_mst_branch_device_by_guid_helper( |
1251 | struct drm_dp_mst_branch *mstb, |
1249 | struct drm_dp_mst_branch *mstb, |
1252 | uint8_t *guid) |
1250 | uint8_t *guid) |
1253 | { |
1251 | { |
1254 | struct drm_dp_mst_branch *found_mstb; |
1252 | struct drm_dp_mst_branch *found_mstb; |
1255 | struct drm_dp_mst_port *port; |
1253 | struct drm_dp_mst_port *port; |
1256 | 1254 | ||
1257 | if (memcmp(mstb->guid, guid, 16) == 0) |
1255 | if (memcmp(mstb->guid, guid, 16) == 0) |
1258 | return mstb; |
1256 | return mstb; |
1259 | 1257 | ||
1260 | 1258 | ||
1261 | list_for_each_entry(port, &mstb->ports, next) { |
1259 | list_for_each_entry(port, &mstb->ports, next) { |
1262 | if (!port->mstb) |
1260 | if (!port->mstb) |
1263 | continue; |
1261 | continue; |
1264 | 1262 | ||
1265 | found_mstb = get_mst_branch_device_by_guid_helper(port->mstb, guid); |
1263 | found_mstb = get_mst_branch_device_by_guid_helper(port->mstb, guid); |
1266 | 1264 | ||
1267 | if (found_mstb) |
1265 | if (found_mstb) |
1268 | return found_mstb; |
1266 | return found_mstb; |
1269 | } |
1267 | } |
1270 | 1268 | ||
1271 | return NULL; |
1269 | return NULL; |
1272 | } |
1270 | } |
1273 | 1271 | ||
1274 | static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device_by_guid( |
1272 | static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device_by_guid( |
1275 | struct drm_dp_mst_topology_mgr *mgr, |
1273 | struct drm_dp_mst_topology_mgr *mgr, |
1276 | uint8_t *guid) |
1274 | uint8_t *guid) |
1277 | { |
1275 | { |
1278 | struct drm_dp_mst_branch *mstb; |
1276 | struct drm_dp_mst_branch *mstb; |
1279 | 1277 | ||
1280 | /* find the port by iterating down */ |
1278 | /* find the port by iterating down */ |
1281 | mutex_lock(&mgr->lock); |
1279 | mutex_lock(&mgr->lock); |
1282 | 1280 | ||
1283 | mstb = get_mst_branch_device_by_guid_helper(mgr->mst_primary, guid); |
1281 | mstb = get_mst_branch_device_by_guid_helper(mgr->mst_primary, guid); |
1284 | 1282 | ||
1285 | if (mstb) |
1283 | if (mstb) |
1286 | kref_get(&mstb->kref); |
1284 | kref_get(&mstb->kref); |
1287 | 1285 | ||
1288 | mutex_unlock(&mgr->lock); |
1286 | mutex_unlock(&mgr->lock); |
1289 | return mstb; |
1287 | return mstb; |
1290 | } |
1288 | } |
1291 | 1289 | ||
1292 | static void drm_dp_check_and_send_link_address(struct drm_dp_mst_topology_mgr *mgr, |
1290 | static void drm_dp_check_and_send_link_address(struct drm_dp_mst_topology_mgr *mgr, |
1293 | struct drm_dp_mst_branch *mstb) |
1291 | struct drm_dp_mst_branch *mstb) |
1294 | { |
1292 | { |
1295 | struct drm_dp_mst_port *port; |
1293 | struct drm_dp_mst_port *port; |
1296 | struct drm_dp_mst_branch *mstb_child; |
1294 | struct drm_dp_mst_branch *mstb_child; |
1297 | if (!mstb->link_address_sent) |
1295 | if (!mstb->link_address_sent) |
1298 | drm_dp_send_link_address(mgr, mstb); |
1296 | drm_dp_send_link_address(mgr, mstb); |
1299 | 1297 | ||
1300 | list_for_each_entry(port, &mstb->ports, next) { |
1298 | list_for_each_entry(port, &mstb->ports, next) { |
1301 | if (port->input) |
1299 | if (port->input) |
1302 | continue; |
1300 | continue; |
1303 | 1301 | ||
1304 | if (!port->ddps) |
1302 | if (!port->ddps) |
1305 | continue; |
1303 | continue; |
1306 | 1304 | ||
1307 | if (!port->available_pbn) |
1305 | if (!port->available_pbn) |
1308 | drm_dp_send_enum_path_resources(mgr, mstb, port); |
1306 | drm_dp_send_enum_path_resources(mgr, mstb, port); |
1309 | 1307 | ||
1310 | if (port->mstb) { |
1308 | if (port->mstb) { |
1311 | mstb_child = drm_dp_get_validated_mstb_ref(mgr, port->mstb); |
1309 | mstb_child = drm_dp_get_validated_mstb_ref(mgr, port->mstb); |
1312 | if (mstb_child) { |
1310 | if (mstb_child) { |
1313 | drm_dp_check_and_send_link_address(mgr, mstb_child); |
1311 | drm_dp_check_and_send_link_address(mgr, mstb_child); |
1314 | drm_dp_put_mst_branch_device(mstb_child); |
1312 | drm_dp_put_mst_branch_device(mstb_child); |
1315 | } |
1313 | } |
1316 | } |
1314 | } |
1317 | } |
1315 | } |
1318 | } |
1316 | } |
1319 | 1317 | ||
1320 | static void drm_dp_mst_link_probe_work(struct work_struct *work) |
1318 | static void drm_dp_mst_link_probe_work(struct work_struct *work) |
1321 | { |
1319 | { |
1322 | struct drm_dp_mst_topology_mgr *mgr = container_of(work, struct drm_dp_mst_topology_mgr, work); |
1320 | struct drm_dp_mst_topology_mgr *mgr = container_of(work, struct drm_dp_mst_topology_mgr, work); |
1323 | struct drm_dp_mst_branch *mstb; |
1321 | struct drm_dp_mst_branch *mstb; |
1324 | 1322 | ||
1325 | mutex_lock(&mgr->lock); |
1323 | mutex_lock(&mgr->lock); |
1326 | mstb = mgr->mst_primary; |
1324 | mstb = mgr->mst_primary; |
1327 | if (mstb) { |
1325 | if (mstb) { |
1328 | kref_get(&mstb->kref); |
1326 | kref_get(&mstb->kref); |
1329 | } |
1327 | } |
1330 | mutex_unlock(&mgr->lock); |
1328 | mutex_unlock(&mgr->lock); |
1331 | if (mstb) { |
1329 | if (mstb) { |
1332 | drm_dp_check_and_send_link_address(mgr, mstb); |
1330 | drm_dp_check_and_send_link_address(mgr, mstb); |
1333 | drm_dp_put_mst_branch_device(mstb); |
1331 | drm_dp_put_mst_branch_device(mstb); |
1334 | } |
1332 | } |
1335 | } |
1333 | } |
1336 | 1334 | ||
1337 | static bool drm_dp_validate_guid(struct drm_dp_mst_topology_mgr *mgr, |
1335 | static bool drm_dp_validate_guid(struct drm_dp_mst_topology_mgr *mgr, |
1338 | u8 *guid) |
1336 | u8 *guid) |
1339 | { |
1337 | { |
1340 | static u8 zero_guid[16]; |
1338 | static u8 zero_guid[16]; |
1341 | 1339 | ||
1342 | if (!memcmp(guid, zero_guid, 16)) { |
1340 | if (!memcmp(guid, zero_guid, 16)) { |
1343 | u64 salt = get_jiffies_64(); |
1341 | u64 salt = get_jiffies_64(); |
1344 | memcpy(&guid[0], &salt, sizeof(u64)); |
1342 | memcpy(&guid[0], &salt, sizeof(u64)); |
1345 | memcpy(&guid[8], &salt, sizeof(u64)); |
1343 | memcpy(&guid[8], &salt, sizeof(u64)); |
1346 | return false; |
1344 | return false; |
1347 | } |
1345 | } |
1348 | return true; |
1346 | return true; |
1349 | } |
1347 | } |
1350 | 1348 | ||
1351 | #if 0 |
1349 | #if 0 |
1352 | static int build_dpcd_read(struct drm_dp_sideband_msg_tx *msg, u8 port_num, u32 offset, u8 num_bytes) |
1350 | static int build_dpcd_read(struct drm_dp_sideband_msg_tx *msg, u8 port_num, u32 offset, u8 num_bytes) |
1353 | { |
1351 | { |
1354 | struct drm_dp_sideband_msg_req_body req; |
1352 | struct drm_dp_sideband_msg_req_body req; |
1355 | 1353 | ||
1356 | req.req_type = DP_REMOTE_DPCD_READ; |
1354 | req.req_type = DP_REMOTE_DPCD_READ; |
1357 | req.u.dpcd_read.port_number = port_num; |
1355 | req.u.dpcd_read.port_number = port_num; |
1358 | req.u.dpcd_read.dpcd_address = offset; |
1356 | req.u.dpcd_read.dpcd_address = offset; |
1359 | req.u.dpcd_read.num_bytes = num_bytes; |
1357 | req.u.dpcd_read.num_bytes = num_bytes; |
1360 | drm_dp_encode_sideband_req(&req, msg); |
1358 | drm_dp_encode_sideband_req(&req, msg); |
1361 | 1359 | ||
1362 | return 0; |
1360 | return 0; |
1363 | } |
1361 | } |
1364 | #endif |
1362 | #endif |
1365 | 1363 | ||
1366 | static int drm_dp_send_sideband_msg(struct drm_dp_mst_topology_mgr *mgr, |
1364 | static int drm_dp_send_sideband_msg(struct drm_dp_mst_topology_mgr *mgr, |
1367 | bool up, u8 *msg, int len) |
1365 | bool up, u8 *msg, int len) |
1368 | { |
1366 | { |
1369 | int ret; |
1367 | int ret; |
1370 | int regbase = up ? DP_SIDEBAND_MSG_UP_REP_BASE : DP_SIDEBAND_MSG_DOWN_REQ_BASE; |
1368 | int regbase = up ? DP_SIDEBAND_MSG_UP_REP_BASE : DP_SIDEBAND_MSG_DOWN_REQ_BASE; |
1371 | int tosend, total, offset; |
1369 | int tosend, total, offset; |
1372 | int retries = 0; |
1370 | int retries = 0; |
1373 | 1371 | ||
1374 | retry: |
1372 | retry: |
1375 | total = len; |
1373 | total = len; |
1376 | offset = 0; |
1374 | offset = 0; |
1377 | do { |
1375 | do { |
1378 | tosend = min3(mgr->max_dpcd_transaction_bytes, 16, total); |
1376 | tosend = min3(mgr->max_dpcd_transaction_bytes, 16, total); |
1379 | 1377 | ||
1380 | ret = drm_dp_dpcd_write(mgr->aux, regbase + offset, |
1378 | ret = drm_dp_dpcd_write(mgr->aux, regbase + offset, |
1381 | &msg[offset], |
1379 | &msg[offset], |
1382 | tosend); |
1380 | tosend); |
1383 | if (ret != tosend) { |
1381 | if (ret != tosend) { |
1384 | if (ret == -EIO && retries < 5) { |
1382 | if (ret == -EIO && retries < 5) { |
1385 | retries++; |
1383 | retries++; |
1386 | goto retry; |
1384 | goto retry; |
1387 | } |
1385 | } |
1388 | DRM_DEBUG_KMS("failed to dpcd write %d %d\n", tosend, ret); |
1386 | DRM_DEBUG_KMS("failed to dpcd write %d %d\n", tosend, ret); |
1389 | 1387 | ||
1390 | return -EIO; |
1388 | return -EIO; |
1391 | } |
1389 | } |
1392 | offset += tosend; |
1390 | offset += tosend; |
1393 | total -= tosend; |
1391 | total -= tosend; |
1394 | } while (total > 0); |
1392 | } while (total > 0); |
1395 | return 0; |
1393 | return 0; |
1396 | } |
1394 | } |
1397 | 1395 | ||
1398 | static int set_hdr_from_dst_qlock(struct drm_dp_sideband_msg_hdr *hdr, |
1396 | static int set_hdr_from_dst_qlock(struct drm_dp_sideband_msg_hdr *hdr, |
1399 | struct drm_dp_sideband_msg_tx *txmsg) |
1397 | struct drm_dp_sideband_msg_tx *txmsg) |
1400 | { |
1398 | { |
1401 | struct drm_dp_mst_branch *mstb = txmsg->dst; |
1399 | struct drm_dp_mst_branch *mstb = txmsg->dst; |
1402 | u8 req_type; |
1400 | u8 req_type; |
1403 | 1401 | ||
1404 | /* both msg slots are full */ |
1402 | /* both msg slots are full */ |
1405 | if (txmsg->seqno == -1) { |
1403 | if (txmsg->seqno == -1) { |
1406 | if (mstb->tx_slots[0] && mstb->tx_slots[1]) { |
1404 | if (mstb->tx_slots[0] && mstb->tx_slots[1]) { |
1407 | DRM_DEBUG_KMS("%s: failed to find slot\n", __func__); |
1405 | DRM_DEBUG_KMS("%s: failed to find slot\n", __func__); |
1408 | return -EAGAIN; |
1406 | return -EAGAIN; |
1409 | } |
1407 | } |
1410 | if (mstb->tx_slots[0] == NULL && mstb->tx_slots[1] == NULL) { |
1408 | if (mstb->tx_slots[0] == NULL && mstb->tx_slots[1] == NULL) { |
1411 | txmsg->seqno = mstb->last_seqno; |
1409 | txmsg->seqno = mstb->last_seqno; |
1412 | mstb->last_seqno ^= 1; |
1410 | mstb->last_seqno ^= 1; |
1413 | } else if (mstb->tx_slots[0] == NULL) |
1411 | } else if (mstb->tx_slots[0] == NULL) |
1414 | txmsg->seqno = 0; |
1412 | txmsg->seqno = 0; |
1415 | else |
1413 | else |
1416 | txmsg->seqno = 1; |
1414 | txmsg->seqno = 1; |
1417 | mstb->tx_slots[txmsg->seqno] = txmsg; |
1415 | mstb->tx_slots[txmsg->seqno] = txmsg; |
1418 | } |
1416 | } |
1419 | 1417 | ||
1420 | req_type = txmsg->msg[0] & 0x7f; |
1418 | req_type = txmsg->msg[0] & 0x7f; |
1421 | if (req_type == DP_CONNECTION_STATUS_NOTIFY || |
1419 | if (req_type == DP_CONNECTION_STATUS_NOTIFY || |
1422 | req_type == DP_RESOURCE_STATUS_NOTIFY) |
1420 | req_type == DP_RESOURCE_STATUS_NOTIFY) |
1423 | hdr->broadcast = 1; |
1421 | hdr->broadcast = 1; |
1424 | else |
1422 | else |
1425 | hdr->broadcast = 0; |
1423 | hdr->broadcast = 0; |
1426 | hdr->path_msg = txmsg->path_msg; |
1424 | hdr->path_msg = txmsg->path_msg; |
1427 | hdr->lct = mstb->lct; |
1425 | hdr->lct = mstb->lct; |
1428 | hdr->lcr = mstb->lct - 1; |
1426 | hdr->lcr = mstb->lct - 1; |
1429 | if (mstb->lct > 1) |
1427 | if (mstb->lct > 1) |
1430 | memcpy(hdr->rad, mstb->rad, mstb->lct / 2); |
1428 | memcpy(hdr->rad, mstb->rad, mstb->lct / 2); |
1431 | hdr->seqno = txmsg->seqno; |
1429 | hdr->seqno = txmsg->seqno; |
1432 | return 0; |
1430 | return 0; |
1433 | } |
1431 | } |
1434 | /* |
1432 | /* |
1435 | * process a single block of the next message in the sideband queue |
1433 | * process a single block of the next message in the sideband queue |
1436 | */ |
1434 | */ |
1437 | static int process_single_tx_qlock(struct drm_dp_mst_topology_mgr *mgr, |
1435 | static int process_single_tx_qlock(struct drm_dp_mst_topology_mgr *mgr, |
1438 | struct drm_dp_sideband_msg_tx *txmsg, |
1436 | struct drm_dp_sideband_msg_tx *txmsg, |
1439 | bool up) |
1437 | bool up) |
1440 | { |
1438 | { |
1441 | u8 chunk[48]; |
1439 | u8 chunk[48]; |
1442 | struct drm_dp_sideband_msg_hdr hdr; |
1440 | struct drm_dp_sideband_msg_hdr hdr; |
1443 | int len, space, idx, tosend; |
1441 | int len, space, idx, tosend; |
1444 | int ret; |
1442 | int ret; |
1445 | 1443 | ||
1446 | memset(&hdr, 0, sizeof(struct drm_dp_sideband_msg_hdr)); |
1444 | memset(&hdr, 0, sizeof(struct drm_dp_sideband_msg_hdr)); |
1447 | 1445 | ||
1448 | if (txmsg->state == DRM_DP_SIDEBAND_TX_QUEUED) { |
1446 | if (txmsg->state == DRM_DP_SIDEBAND_TX_QUEUED) { |
1449 | txmsg->seqno = -1; |
1447 | txmsg->seqno = -1; |
1450 | txmsg->state = DRM_DP_SIDEBAND_TX_START_SEND; |
1448 | txmsg->state = DRM_DP_SIDEBAND_TX_START_SEND; |
1451 | } |
1449 | } |
1452 | 1450 | ||
1453 | /* make hdr from dst mst - for replies use seqno |
1451 | /* make hdr from dst mst - for replies use seqno |
1454 | otherwise assign one */ |
1452 | otherwise assign one */ |
1455 | ret = set_hdr_from_dst_qlock(&hdr, txmsg); |
1453 | ret = set_hdr_from_dst_qlock(&hdr, txmsg); |
1456 | if (ret < 0) |
1454 | if (ret < 0) |
1457 | return ret; |
1455 | return ret; |
1458 | 1456 | ||
1459 | /* amount left to send in this message */ |
1457 | /* amount left to send in this message */ |
1460 | len = txmsg->cur_len - txmsg->cur_offset; |
1458 | len = txmsg->cur_len - txmsg->cur_offset; |
1461 | 1459 | ||
1462 | /* 48 - sideband msg size - 1 byte for data CRC, x header bytes */ |
1460 | /* 48 - sideband msg size - 1 byte for data CRC, x header bytes */ |
1463 | space = 48 - 1 - drm_dp_calc_sb_hdr_size(&hdr); |
1461 | space = 48 - 1 - drm_dp_calc_sb_hdr_size(&hdr); |
1464 | 1462 | ||
1465 | tosend = min(len, space); |
1463 | tosend = min(len, space); |
1466 | if (len == txmsg->cur_len) |
1464 | if (len == txmsg->cur_len) |
1467 | hdr.somt = 1; |
1465 | hdr.somt = 1; |
1468 | if (space >= len) |
1466 | if (space >= len) |
1469 | hdr.eomt = 1; |
1467 | hdr.eomt = 1; |
1470 | 1468 | ||
1471 | 1469 | ||
1472 | hdr.msg_len = tosend + 1; |
1470 | hdr.msg_len = tosend + 1; |
1473 | drm_dp_encode_sideband_msg_hdr(&hdr, chunk, &idx); |
1471 | drm_dp_encode_sideband_msg_hdr(&hdr, chunk, &idx); |
1474 | memcpy(&chunk[idx], &txmsg->msg[txmsg->cur_offset], tosend); |
1472 | memcpy(&chunk[idx], &txmsg->msg[txmsg->cur_offset], tosend); |
1475 | /* add crc at end */ |
1473 | /* add crc at end */ |
1476 | drm_dp_crc_sideband_chunk_req(&chunk[idx], tosend); |
1474 | drm_dp_crc_sideband_chunk_req(&chunk[idx], tosend); |
1477 | idx += tosend + 1; |
1475 | idx += tosend + 1; |
1478 | 1476 | ||
1479 | ret = drm_dp_send_sideband_msg(mgr, up, chunk, idx); |
1477 | ret = drm_dp_send_sideband_msg(mgr, up, chunk, idx); |
1480 | if (ret) { |
1478 | if (ret) { |
1481 | DRM_DEBUG_KMS("sideband msg failed to send\n"); |
1479 | DRM_DEBUG_KMS("sideband msg failed to send\n"); |
1482 | return ret; |
1480 | return ret; |
1483 | } |
1481 | } |
1484 | 1482 | ||
1485 | txmsg->cur_offset += tosend; |
1483 | txmsg->cur_offset += tosend; |
1486 | if (txmsg->cur_offset == txmsg->cur_len) { |
1484 | if (txmsg->cur_offset == txmsg->cur_len) { |
1487 | txmsg->state = DRM_DP_SIDEBAND_TX_SENT; |
1485 | txmsg->state = DRM_DP_SIDEBAND_TX_SENT; |
1488 | return 1; |
1486 | return 1; |
1489 | } |
1487 | } |
1490 | return 0; |
1488 | return 0; |
1491 | } |
1489 | } |
1492 | 1490 | ||
1493 | static void process_single_down_tx_qlock(struct drm_dp_mst_topology_mgr *mgr) |
1491 | static void process_single_down_tx_qlock(struct drm_dp_mst_topology_mgr *mgr) |
1494 | { |
1492 | { |
1495 | struct drm_dp_sideband_msg_tx *txmsg; |
1493 | struct drm_dp_sideband_msg_tx *txmsg; |
1496 | int ret; |
1494 | int ret; |
1497 | 1495 | ||
1498 | WARN_ON(!mutex_is_locked(&mgr->qlock)); |
1496 | WARN_ON(!mutex_is_locked(&mgr->qlock)); |
1499 | 1497 | ||
1500 | /* construct a chunk from the first msg in the tx_msg queue */ |
1498 | /* construct a chunk from the first msg in the tx_msg queue */ |
1501 | if (list_empty(&mgr->tx_msg_downq)) { |
1499 | if (list_empty(&mgr->tx_msg_downq)) { |
1502 | mgr->tx_down_in_progress = false; |
1500 | mgr->tx_down_in_progress = false; |
1503 | return; |
1501 | return; |
1504 | } |
1502 | } |
1505 | mgr->tx_down_in_progress = true; |
1503 | mgr->tx_down_in_progress = true; |
1506 | 1504 | ||
1507 | txmsg = list_first_entry(&mgr->tx_msg_downq, struct drm_dp_sideband_msg_tx, next); |
1505 | txmsg = list_first_entry(&mgr->tx_msg_downq, struct drm_dp_sideband_msg_tx, next); |
1508 | ret = process_single_tx_qlock(mgr, txmsg, false); |
1506 | ret = process_single_tx_qlock(mgr, txmsg, false); |
1509 | if (ret == 1) { |
1507 | if (ret == 1) { |
1510 | /* txmsg is sent it should be in the slots now */ |
1508 | /* txmsg is sent it should be in the slots now */ |
1511 | list_del(&txmsg->next); |
1509 | list_del(&txmsg->next); |
1512 | } else if (ret) { |
1510 | } else if (ret) { |
1513 | DRM_DEBUG_KMS("failed to send msg in q %d\n", ret); |
1511 | DRM_DEBUG_KMS("failed to send msg in q %d\n", ret); |
1514 | list_del(&txmsg->next); |
1512 | list_del(&txmsg->next); |
1515 | if (txmsg->seqno != -1) |
1513 | if (txmsg->seqno != -1) |
1516 | txmsg->dst->tx_slots[txmsg->seqno] = NULL; |
1514 | txmsg->dst->tx_slots[txmsg->seqno] = NULL; |
1517 | txmsg->state = DRM_DP_SIDEBAND_TX_TIMEOUT; |
1515 | txmsg->state = DRM_DP_SIDEBAND_TX_TIMEOUT; |
1518 | // wake_up(&mgr->tx_waitq); |
1516 | // wake_up(&mgr->tx_waitq); |
1519 | } |
1517 | } |
1520 | if (list_empty(&mgr->tx_msg_downq)) { |
1518 | if (list_empty(&mgr->tx_msg_downq)) { |
1521 | mgr->tx_down_in_progress = false; |
1519 | mgr->tx_down_in_progress = false; |
1522 | return; |
1520 | return; |
1523 | } |
1521 | } |
1524 | } |
1522 | } |
1525 | 1523 | ||
1526 | /* called holding qlock */ |
1524 | /* called holding qlock */ |
1527 | static void process_single_up_tx_qlock(struct drm_dp_mst_topology_mgr *mgr, |
1525 | static void process_single_up_tx_qlock(struct drm_dp_mst_topology_mgr *mgr, |
1528 | struct drm_dp_sideband_msg_tx *txmsg) |
1526 | struct drm_dp_sideband_msg_tx *txmsg) |
1529 | { |
1527 | { |
1530 | int ret; |
1528 | int ret; |
1531 | 1529 | ||
1532 | /* construct a chunk from the first msg in the tx_msg queue */ |
1530 | /* construct a chunk from the first msg in the tx_msg queue */ |
1533 | ret = process_single_tx_qlock(mgr, txmsg, true); |
1531 | ret = process_single_tx_qlock(mgr, txmsg, true); |
1534 | 1532 | ||
1535 | if (ret != 1) |
1533 | if (ret != 1) |
1536 | DRM_DEBUG_KMS("failed to send msg in q %d\n", ret); |
1534 | DRM_DEBUG_KMS("failed to send msg in q %d\n", ret); |
1537 | 1535 | ||
1538 | txmsg->dst->tx_slots[txmsg->seqno] = NULL; |
1536 | txmsg->dst->tx_slots[txmsg->seqno] = NULL; |
1539 | } |
1537 | } |
1540 | 1538 | ||
1541 | static void drm_dp_queue_down_tx(struct drm_dp_mst_topology_mgr *mgr, |
1539 | static void drm_dp_queue_down_tx(struct drm_dp_mst_topology_mgr *mgr, |
1542 | struct drm_dp_sideband_msg_tx *txmsg) |
1540 | struct drm_dp_sideband_msg_tx *txmsg) |
1543 | { |
1541 | { |
1544 | mutex_lock(&mgr->qlock); |
1542 | mutex_lock(&mgr->qlock); |
1545 | list_add_tail(&txmsg->next, &mgr->tx_msg_downq); |
1543 | list_add_tail(&txmsg->next, &mgr->tx_msg_downq); |
1546 | if (!mgr->tx_down_in_progress) |
1544 | if (!mgr->tx_down_in_progress) |
1547 | process_single_down_tx_qlock(mgr); |
1545 | process_single_down_tx_qlock(mgr); |
1548 | mutex_unlock(&mgr->qlock); |
1546 | mutex_unlock(&mgr->qlock); |
1549 | } |
1547 | } |
1550 | 1548 | ||
1551 | static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr, |
1549 | static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr, |
1552 | struct drm_dp_mst_branch *mstb) |
1550 | struct drm_dp_mst_branch *mstb) |
1553 | { |
1551 | { |
1554 | int len; |
1552 | int len; |
1555 | struct drm_dp_sideband_msg_tx *txmsg; |
1553 | struct drm_dp_sideband_msg_tx *txmsg; |
1556 | int ret; |
1554 | int ret; |
1557 | 1555 | ||
1558 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1556 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1559 | if (!txmsg) |
1557 | if (!txmsg) |
1560 | return; |
1558 | return; |
1561 | 1559 | ||
1562 | txmsg->dst = mstb; |
1560 | txmsg->dst = mstb; |
1563 | len = build_link_address(txmsg); |
1561 | len = build_link_address(txmsg); |
1564 | 1562 | ||
1565 | mstb->link_address_sent = true; |
1563 | mstb->link_address_sent = true; |
1566 | drm_dp_queue_down_tx(mgr, txmsg); |
1564 | drm_dp_queue_down_tx(mgr, txmsg); |
1567 | 1565 | ||
1568 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); |
1566 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); |
1569 | if (ret > 0) { |
1567 | if (ret > 0) { |
1570 | int i; |
1568 | int i; |
1571 | 1569 | ||
1572 | if (txmsg->reply.reply_type == 1) |
1570 | if (txmsg->reply.reply_type == 1) |
1573 | DRM_DEBUG_KMS("link address nak received\n"); |
1571 | DRM_DEBUG_KMS("link address nak received\n"); |
1574 | else { |
1572 | else { |
1575 | DRM_DEBUG_KMS("link address reply: %d\n", txmsg->reply.u.link_addr.nports); |
1573 | DRM_DEBUG_KMS("link address reply: %d\n", txmsg->reply.u.link_addr.nports); |
1576 | for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) { |
1574 | for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) { |
1577 | DRM_DEBUG_KMS("port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n", i, |
1575 | DRM_DEBUG_KMS("port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n", i, |
1578 | txmsg->reply.u.link_addr.ports[i].input_port, |
1576 | txmsg->reply.u.link_addr.ports[i].input_port, |
1579 | txmsg->reply.u.link_addr.ports[i].peer_device_type, |
1577 | txmsg->reply.u.link_addr.ports[i].peer_device_type, |
1580 | txmsg->reply.u.link_addr.ports[i].port_number, |
1578 | txmsg->reply.u.link_addr.ports[i].port_number, |
1581 | txmsg->reply.u.link_addr.ports[i].dpcd_revision, |
1579 | txmsg->reply.u.link_addr.ports[i].dpcd_revision, |
1582 | txmsg->reply.u.link_addr.ports[i].mcs, |
1580 | txmsg->reply.u.link_addr.ports[i].mcs, |
1583 | txmsg->reply.u.link_addr.ports[i].ddps, |
1581 | txmsg->reply.u.link_addr.ports[i].ddps, |
1584 | txmsg->reply.u.link_addr.ports[i].legacy_device_plug_status, |
1582 | txmsg->reply.u.link_addr.ports[i].legacy_device_plug_status, |
1585 | txmsg->reply.u.link_addr.ports[i].num_sdp_streams, |
1583 | txmsg->reply.u.link_addr.ports[i].num_sdp_streams, |
1586 | txmsg->reply.u.link_addr.ports[i].num_sdp_stream_sinks); |
1584 | txmsg->reply.u.link_addr.ports[i].num_sdp_stream_sinks); |
1587 | } |
1585 | } |
1588 | 1586 | ||
1589 | drm_dp_check_mstb_guid(mstb, txmsg->reply.u.link_addr.guid); |
1587 | drm_dp_check_mstb_guid(mstb, txmsg->reply.u.link_addr.guid); |
1590 | 1588 | ||
1591 | for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) { |
1589 | for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) { |
1592 | drm_dp_add_port(mstb, mgr->dev, &txmsg->reply.u.link_addr.ports[i]); |
1590 | drm_dp_add_port(mstb, mgr->dev, &txmsg->reply.u.link_addr.ports[i]); |
1593 | } |
1591 | } |
1594 | (*mgr->cbs->hotplug)(mgr); |
1592 | (*mgr->cbs->hotplug)(mgr); |
1595 | } |
1593 | } |
1596 | } else { |
1594 | } else { |
1597 | mstb->link_address_sent = false; |
1595 | mstb->link_address_sent = false; |
1598 | DRM_DEBUG_KMS("link address failed %d\n", ret); |
1596 | DRM_DEBUG_KMS("link address failed %d\n", ret); |
1599 | } |
1597 | } |
1600 | 1598 | ||
1601 | kfree(txmsg); |
1599 | kfree(txmsg); |
1602 | } |
1600 | } |
1603 | 1601 | ||
1604 | static int drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr, |
1602 | static int drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr, |
1605 | struct drm_dp_mst_branch *mstb, |
1603 | struct drm_dp_mst_branch *mstb, |
1606 | struct drm_dp_mst_port *port) |
1604 | struct drm_dp_mst_port *port) |
1607 | { |
1605 | { |
1608 | int len; |
1606 | int len; |
1609 | struct drm_dp_sideband_msg_tx *txmsg; |
1607 | struct drm_dp_sideband_msg_tx *txmsg; |
1610 | int ret; |
1608 | int ret; |
1611 | 1609 | ||
1612 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1610 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1613 | if (!txmsg) |
1611 | if (!txmsg) |
1614 | return -ENOMEM; |
1612 | return -ENOMEM; |
1615 | 1613 | ||
1616 | txmsg->dst = mstb; |
1614 | txmsg->dst = mstb; |
1617 | len = build_enum_path_resources(txmsg, port->port_num); |
1615 | len = build_enum_path_resources(txmsg, port->port_num); |
1618 | 1616 | ||
1619 | drm_dp_queue_down_tx(mgr, txmsg); |
1617 | drm_dp_queue_down_tx(mgr, txmsg); |
1620 | 1618 | ||
1621 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); |
1619 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); |
1622 | if (ret > 0) { |
1620 | if (ret > 0) { |
1623 | if (txmsg->reply.reply_type == 1) |
1621 | if (txmsg->reply.reply_type == 1) |
1624 | DRM_DEBUG_KMS("enum path resources nak received\n"); |
1622 | DRM_DEBUG_KMS("enum path resources nak received\n"); |
1625 | else { |
1623 | else { |
1626 | if (port->port_num != txmsg->reply.u.path_resources.port_number) |
1624 | if (port->port_num != txmsg->reply.u.path_resources.port_number) |
1627 | DRM_ERROR("got incorrect port in response\n"); |
1625 | DRM_ERROR("got incorrect port in response\n"); |
1628 | DRM_DEBUG_KMS("enum path resources %d: %d %d\n", txmsg->reply.u.path_resources.port_number, txmsg->reply.u.path_resources.full_payload_bw_number, |
1626 | DRM_DEBUG_KMS("enum path resources %d: %d %d\n", txmsg->reply.u.path_resources.port_number, txmsg->reply.u.path_resources.full_payload_bw_number, |
1629 | txmsg->reply.u.path_resources.avail_payload_bw_number); |
1627 | txmsg->reply.u.path_resources.avail_payload_bw_number); |
1630 | port->available_pbn = txmsg->reply.u.path_resources.avail_payload_bw_number; |
1628 | port->available_pbn = txmsg->reply.u.path_resources.avail_payload_bw_number; |
1631 | } |
1629 | } |
1632 | } |
1630 | } |
1633 | 1631 | ||
1634 | kfree(txmsg); |
1632 | kfree(txmsg); |
1635 | return 0; |
1633 | return 0; |
1636 | } |
1634 | } |
1637 | 1635 | ||
1638 | static struct drm_dp_mst_port *drm_dp_get_last_connected_port_to_mstb(struct drm_dp_mst_branch *mstb) |
1636 | static struct drm_dp_mst_port *drm_dp_get_last_connected_port_to_mstb(struct drm_dp_mst_branch *mstb) |
1639 | { |
1637 | { |
1640 | if (!mstb->port_parent) |
1638 | if (!mstb->port_parent) |
1641 | return NULL; |
1639 | return NULL; |
1642 | 1640 | ||
1643 | if (mstb->port_parent->mstb != mstb) |
1641 | if (mstb->port_parent->mstb != mstb) |
1644 | return mstb->port_parent; |
1642 | return mstb->port_parent; |
1645 | 1643 | ||
1646 | return drm_dp_get_last_connected_port_to_mstb(mstb->port_parent->parent); |
1644 | return drm_dp_get_last_connected_port_to_mstb(mstb->port_parent->parent); |
1647 | } |
1645 | } |
1648 | 1646 | ||
1649 | static struct drm_dp_mst_branch *drm_dp_get_last_connected_port_and_mstb(struct drm_dp_mst_topology_mgr *mgr, |
1647 | static struct drm_dp_mst_branch *drm_dp_get_last_connected_port_and_mstb(struct drm_dp_mst_topology_mgr *mgr, |
1650 | struct drm_dp_mst_branch *mstb, |
1648 | struct drm_dp_mst_branch *mstb, |
1651 | int *port_num) |
1649 | int *port_num) |
1652 | { |
1650 | { |
1653 | struct drm_dp_mst_branch *rmstb = NULL; |
1651 | struct drm_dp_mst_branch *rmstb = NULL; |
1654 | struct drm_dp_mst_port *found_port; |
1652 | struct drm_dp_mst_port *found_port; |
1655 | mutex_lock(&mgr->lock); |
1653 | mutex_lock(&mgr->lock); |
1656 | if (mgr->mst_primary) { |
1654 | if (mgr->mst_primary) { |
1657 | found_port = drm_dp_get_last_connected_port_to_mstb(mstb); |
1655 | found_port = drm_dp_get_last_connected_port_to_mstb(mstb); |
1658 | 1656 | ||
1659 | if (found_port) { |
1657 | if (found_port) { |
1660 | rmstb = found_port->parent; |
1658 | rmstb = found_port->parent; |
1661 | kref_get(&rmstb->kref); |
1659 | kref_get(&rmstb->kref); |
1662 | *port_num = found_port->port_num; |
1660 | *port_num = found_port->port_num; |
1663 | } |
1661 | } |
1664 | } |
1662 | } |
1665 | mutex_unlock(&mgr->lock); |
1663 | mutex_unlock(&mgr->lock); |
1666 | return rmstb; |
1664 | return rmstb; |
1667 | } |
1665 | } |
1668 | 1666 | ||
1669 | static int drm_dp_payload_send_msg(struct drm_dp_mst_topology_mgr *mgr, |
1667 | static int drm_dp_payload_send_msg(struct drm_dp_mst_topology_mgr *mgr, |
1670 | struct drm_dp_mst_port *port, |
1668 | struct drm_dp_mst_port *port, |
1671 | int id, |
1669 | int id, |
1672 | int pbn) |
1670 | int pbn) |
1673 | { |
1671 | { |
1674 | struct drm_dp_sideband_msg_tx *txmsg; |
1672 | struct drm_dp_sideband_msg_tx *txmsg; |
1675 | struct drm_dp_mst_branch *mstb; |
1673 | struct drm_dp_mst_branch *mstb; |
1676 | int len, ret, port_num; |
1674 | int len, ret, port_num; |
- | 1675 | u8 sinks[DRM_DP_MAX_SDP_STREAMS]; |
|
- | 1676 | int i; |
|
1677 | 1677 | ||
1678 | port = drm_dp_get_validated_port_ref(mgr, port); |
1678 | port = drm_dp_get_validated_port_ref(mgr, port); |
1679 | if (!port) |
1679 | if (!port) |
1680 | return -EINVAL; |
1680 | return -EINVAL; |
1681 | 1681 | ||
1682 | port_num = port->port_num; |
1682 | port_num = port->port_num; |
1683 | mstb = drm_dp_get_validated_mstb_ref(mgr, port->parent); |
1683 | mstb = drm_dp_get_validated_mstb_ref(mgr, port->parent); |
1684 | if (!mstb) { |
1684 | if (!mstb) { |
1685 | mstb = drm_dp_get_last_connected_port_and_mstb(mgr, port->parent, &port_num); |
1685 | mstb = drm_dp_get_last_connected_port_and_mstb(mgr, port->parent, &port_num); |
1686 | 1686 | ||
1687 | if (!mstb) { |
1687 | if (!mstb) { |
1688 | drm_dp_put_port(port); |
1688 | drm_dp_put_port(port); |
1689 | return -EINVAL; |
1689 | return -EINVAL; |
1690 | } |
1690 | } |
1691 | } |
1691 | } |
1692 | 1692 | ||
1693 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1693 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1694 | if (!txmsg) { |
1694 | if (!txmsg) { |
1695 | ret = -ENOMEM; |
1695 | ret = -ENOMEM; |
1696 | goto fail_put; |
1696 | goto fail_put; |
1697 | } |
1697 | } |
- | 1698 | ||
- | 1699 | for (i = 0; i < port->num_sdp_streams; i++) |
|
- | 1700 | sinks[i] = i; |
|
1698 | 1701 | ||
1699 | txmsg->dst = mstb; |
1702 | txmsg->dst = mstb; |
1700 | len = build_allocate_payload(txmsg, port_num, |
1703 | len = build_allocate_payload(txmsg, port_num, |
1701 | id, |
1704 | id, |
1702 | pbn); |
1705 | pbn, port->num_sdp_streams, sinks); |
1703 | 1706 | ||
1704 | drm_dp_queue_down_tx(mgr, txmsg); |
1707 | drm_dp_queue_down_tx(mgr, txmsg); |
1705 | 1708 | ||
1706 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); |
1709 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); |
1707 | if (ret > 0) { |
1710 | if (ret > 0) { |
1708 | if (txmsg->reply.reply_type == 1) { |
1711 | if (txmsg->reply.reply_type == 1) { |
1709 | ret = -EINVAL; |
1712 | ret = -EINVAL; |
1710 | } else |
1713 | } else |
1711 | ret = 0; |
1714 | ret = 0; |
1712 | } |
1715 | } |
1713 | kfree(txmsg); |
1716 | kfree(txmsg); |
1714 | fail_put: |
1717 | fail_put: |
1715 | drm_dp_put_mst_branch_device(mstb); |
1718 | drm_dp_put_mst_branch_device(mstb); |
1716 | drm_dp_put_port(port); |
1719 | drm_dp_put_port(port); |
1717 | return ret; |
1720 | return ret; |
1718 | } |
1721 | } |
1719 | 1722 | ||
1720 | static int drm_dp_create_payload_step1(struct drm_dp_mst_topology_mgr *mgr, |
1723 | static int drm_dp_create_payload_step1(struct drm_dp_mst_topology_mgr *mgr, |
1721 | int id, |
1724 | int id, |
1722 | struct drm_dp_payload *payload) |
1725 | struct drm_dp_payload *payload) |
1723 | { |
1726 | { |
1724 | int ret; |
1727 | int ret; |
1725 | 1728 | ||
1726 | ret = drm_dp_dpcd_write_payload(mgr, id, payload); |
1729 | ret = drm_dp_dpcd_write_payload(mgr, id, payload); |
1727 | if (ret < 0) { |
1730 | if (ret < 0) { |
1728 | payload->payload_state = 0; |
1731 | payload->payload_state = 0; |
1729 | return ret; |
1732 | return ret; |
1730 | } |
1733 | } |
1731 | payload->payload_state = DP_PAYLOAD_LOCAL; |
1734 | payload->payload_state = DP_PAYLOAD_LOCAL; |
1732 | return 0; |
1735 | return 0; |
1733 | } |
1736 | } |
1734 | 1737 | ||
1735 | static int drm_dp_create_payload_step2(struct drm_dp_mst_topology_mgr *mgr, |
1738 | static int drm_dp_create_payload_step2(struct drm_dp_mst_topology_mgr *mgr, |
1736 | struct drm_dp_mst_port *port, |
1739 | struct drm_dp_mst_port *port, |
1737 | int id, |
1740 | int id, |
1738 | struct drm_dp_payload *payload) |
1741 | struct drm_dp_payload *payload) |
1739 | { |
1742 | { |
1740 | int ret; |
1743 | int ret; |
1741 | ret = drm_dp_payload_send_msg(mgr, port, id, port->vcpi.pbn); |
1744 | ret = drm_dp_payload_send_msg(mgr, port, id, port->vcpi.pbn); |
1742 | if (ret < 0) |
1745 | if (ret < 0) |
1743 | return ret; |
1746 | return ret; |
1744 | payload->payload_state = DP_PAYLOAD_REMOTE; |
1747 | payload->payload_state = DP_PAYLOAD_REMOTE; |
1745 | return ret; |
1748 | return ret; |
1746 | } |
1749 | } |
1747 | 1750 | ||
1748 | static int drm_dp_destroy_payload_step1(struct drm_dp_mst_topology_mgr *mgr, |
1751 | static int drm_dp_destroy_payload_step1(struct drm_dp_mst_topology_mgr *mgr, |
1749 | struct drm_dp_mst_port *port, |
1752 | struct drm_dp_mst_port *port, |
1750 | int id, |
1753 | int id, |
1751 | struct drm_dp_payload *payload) |
1754 | struct drm_dp_payload *payload) |
1752 | { |
1755 | { |
1753 | DRM_DEBUG_KMS("\n"); |
1756 | DRM_DEBUG_KMS("\n"); |
1754 | /* its okay for these to fail */ |
1757 | /* its okay for these to fail */ |
1755 | if (port) { |
1758 | if (port) { |
1756 | drm_dp_payload_send_msg(mgr, port, id, 0); |
1759 | drm_dp_payload_send_msg(mgr, port, id, 0); |
1757 | } |
1760 | } |
1758 | 1761 | ||
1759 | drm_dp_dpcd_write_payload(mgr, id, payload); |
1762 | drm_dp_dpcd_write_payload(mgr, id, payload); |
1760 | payload->payload_state = DP_PAYLOAD_DELETE_LOCAL; |
1763 | payload->payload_state = DP_PAYLOAD_DELETE_LOCAL; |
1761 | return 0; |
1764 | return 0; |
1762 | } |
1765 | } |
1763 | 1766 | ||
1764 | static int drm_dp_destroy_payload_step2(struct drm_dp_mst_topology_mgr *mgr, |
1767 | static int drm_dp_destroy_payload_step2(struct drm_dp_mst_topology_mgr *mgr, |
1765 | int id, |
1768 | int id, |
1766 | struct drm_dp_payload *payload) |
1769 | struct drm_dp_payload *payload) |
1767 | { |
1770 | { |
1768 | payload->payload_state = 0; |
1771 | payload->payload_state = 0; |
1769 | return 0; |
1772 | return 0; |
1770 | } |
1773 | } |
1771 | 1774 | ||
1772 | /** |
1775 | /** |
1773 | * drm_dp_update_payload_part1() - Execute payload update part 1 |
1776 | * drm_dp_update_payload_part1() - Execute payload update part 1 |
1774 | * @mgr: manager to use. |
1777 | * @mgr: manager to use. |
1775 | * |
1778 | * |
1776 | * This iterates over all proposed virtual channels, and tries to |
1779 | * This iterates over all proposed virtual channels, and tries to |
1777 | * allocate space in the link for them. For 0->slots transitions, |
1780 | * allocate space in the link for them. For 0->slots transitions, |
1778 | * this step just writes the VCPI to the MST device. For slots->0 |
1781 | * this step just writes the VCPI to the MST device. For slots->0 |
1779 | * transitions, this writes the updated VCPIs and removes the |
1782 | * transitions, this writes the updated VCPIs and removes the |
1780 | * remote VC payloads. |
1783 | * remote VC payloads. |
1781 | * |
1784 | * |
1782 | * after calling this the driver should generate ACT and payload |
1785 | * after calling this the driver should generate ACT and payload |
1783 | * packets. |
1786 | * packets. |
1784 | */ |
1787 | */ |
1785 | int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr) |
1788 | int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr) |
1786 | { |
1789 | { |
1787 | int i, j; |
1790 | int i, j; |
1788 | int cur_slots = 1; |
1791 | int cur_slots = 1; |
1789 | struct drm_dp_payload req_payload; |
1792 | struct drm_dp_payload req_payload; |
1790 | struct drm_dp_mst_port *port; |
1793 | struct drm_dp_mst_port *port; |
1791 | 1794 | ||
1792 | mutex_lock(&mgr->payload_lock); |
1795 | mutex_lock(&mgr->payload_lock); |
1793 | for (i = 0; i < mgr->max_payloads; i++) { |
1796 | for (i = 0; i < mgr->max_payloads; i++) { |
1794 | /* solve the current payloads - compare to the hw ones |
1797 | /* solve the current payloads - compare to the hw ones |
1795 | - update the hw view */ |
1798 | - update the hw view */ |
1796 | req_payload.start_slot = cur_slots; |
1799 | req_payload.start_slot = cur_slots; |
1797 | if (mgr->proposed_vcpis[i]) { |
1800 | if (mgr->proposed_vcpis[i]) { |
1798 | port = container_of(mgr->proposed_vcpis[i], struct drm_dp_mst_port, vcpi); |
1801 | port = container_of(mgr->proposed_vcpis[i], struct drm_dp_mst_port, vcpi); |
1799 | port = drm_dp_get_validated_port_ref(mgr, port); |
1802 | port = drm_dp_get_validated_port_ref(mgr, port); |
1800 | if (!port) { |
1803 | if (!port) { |
1801 | mutex_unlock(&mgr->payload_lock); |
1804 | mutex_unlock(&mgr->payload_lock); |
1802 | return -EINVAL; |
1805 | return -EINVAL; |
1803 | } |
1806 | } |
1804 | req_payload.num_slots = mgr->proposed_vcpis[i]->num_slots; |
1807 | req_payload.num_slots = mgr->proposed_vcpis[i]->num_slots; |
- | 1808 | req_payload.vcpi = mgr->proposed_vcpis[i]->vcpi; |
|
1805 | } else { |
1809 | } else { |
1806 | port = NULL; |
1810 | port = NULL; |
1807 | req_payload.num_slots = 0; |
1811 | req_payload.num_slots = 0; |
1808 | } |
1812 | } |
1809 | 1813 | ||
1810 | if (mgr->payloads[i].start_slot != req_payload.start_slot) { |
1814 | if (mgr->payloads[i].start_slot != req_payload.start_slot) { |
1811 | mgr->payloads[i].start_slot = req_payload.start_slot; |
1815 | mgr->payloads[i].start_slot = req_payload.start_slot; |
1812 | } |
1816 | } |
1813 | /* work out what is required to happen with this payload */ |
1817 | /* work out what is required to happen with this payload */ |
1814 | if (mgr->payloads[i].num_slots != req_payload.num_slots) { |
1818 | if (mgr->payloads[i].num_slots != req_payload.num_slots) { |
1815 | 1819 | ||
1816 | /* need to push an update for this payload */ |
1820 | /* need to push an update for this payload */ |
1817 | if (req_payload.num_slots) { |
1821 | if (req_payload.num_slots) { |
1818 | drm_dp_create_payload_step1(mgr, mgr->proposed_vcpis[i]->vcpi, &req_payload); |
1822 | drm_dp_create_payload_step1(mgr, mgr->proposed_vcpis[i]->vcpi, &req_payload); |
1819 | mgr->payloads[i].num_slots = req_payload.num_slots; |
1823 | mgr->payloads[i].num_slots = req_payload.num_slots; |
- | 1824 | mgr->payloads[i].vcpi = req_payload.vcpi; |
|
1820 | } else if (mgr->payloads[i].num_slots) { |
1825 | } else if (mgr->payloads[i].num_slots) { |
1821 | mgr->payloads[i].num_slots = 0; |
1826 | mgr->payloads[i].num_slots = 0; |
1822 | drm_dp_destroy_payload_step1(mgr, port, mgr->payloads[i].vcpi, &mgr->payloads[i]); |
1827 | drm_dp_destroy_payload_step1(mgr, port, port->vcpi.vcpi, &mgr->payloads[i]); |
1823 | req_payload.payload_state = mgr->payloads[i].payload_state; |
1828 | req_payload.payload_state = mgr->payloads[i].payload_state; |
1824 | mgr->payloads[i].start_slot = 0; |
1829 | mgr->payloads[i].start_slot = 0; |
1825 | } |
1830 | } |
1826 | mgr->payloads[i].payload_state = req_payload.payload_state; |
1831 | mgr->payloads[i].payload_state = req_payload.payload_state; |
1827 | } |
1832 | } |
1828 | cur_slots += req_payload.num_slots; |
1833 | cur_slots += req_payload.num_slots; |
1829 | 1834 | ||
1830 | if (port) |
1835 | if (port) |
1831 | drm_dp_put_port(port); |
1836 | drm_dp_put_port(port); |
1832 | } |
1837 | } |
1833 | 1838 | ||
1834 | for (i = 0; i < mgr->max_payloads; i++) { |
1839 | for (i = 0; i < mgr->max_payloads; i++) { |
1835 | if (mgr->payloads[i].payload_state == DP_PAYLOAD_DELETE_LOCAL) { |
1840 | if (mgr->payloads[i].payload_state == DP_PAYLOAD_DELETE_LOCAL) { |
1836 | DRM_DEBUG_KMS("removing payload %d\n", i); |
1841 | DRM_DEBUG_KMS("removing payload %d\n", i); |
1837 | for (j = i; j < mgr->max_payloads - 1; j++) { |
1842 | for (j = i; j < mgr->max_payloads - 1; j++) { |
1838 | memcpy(&mgr->payloads[j], &mgr->payloads[j + 1], sizeof(struct drm_dp_payload)); |
1843 | memcpy(&mgr->payloads[j], &mgr->payloads[j + 1], sizeof(struct drm_dp_payload)); |
1839 | mgr->proposed_vcpis[j] = mgr->proposed_vcpis[j + 1]; |
1844 | mgr->proposed_vcpis[j] = mgr->proposed_vcpis[j + 1]; |
1840 | if (mgr->proposed_vcpis[j] && mgr->proposed_vcpis[j]->num_slots) { |
1845 | if (mgr->proposed_vcpis[j] && mgr->proposed_vcpis[j]->num_slots) { |
1841 | set_bit(j + 1, &mgr->payload_mask); |
1846 | set_bit(j + 1, &mgr->payload_mask); |
1842 | } else { |
1847 | } else { |
1843 | clear_bit(j + 1, &mgr->payload_mask); |
1848 | clear_bit(j + 1, &mgr->payload_mask); |
1844 | } |
1849 | } |
1845 | } |
1850 | } |
1846 | memset(&mgr->payloads[mgr->max_payloads - 1], 0, sizeof(struct drm_dp_payload)); |
1851 | memset(&mgr->payloads[mgr->max_payloads - 1], 0, sizeof(struct drm_dp_payload)); |
1847 | mgr->proposed_vcpis[mgr->max_payloads - 1] = NULL; |
1852 | mgr->proposed_vcpis[mgr->max_payloads - 1] = NULL; |
1848 | clear_bit(mgr->max_payloads, &mgr->payload_mask); |
1853 | clear_bit(mgr->max_payloads, &mgr->payload_mask); |
1849 | 1854 | ||
1850 | } |
1855 | } |
1851 | } |
1856 | } |
1852 | mutex_unlock(&mgr->payload_lock); |
1857 | mutex_unlock(&mgr->payload_lock); |
1853 | 1858 | ||
1854 | return 0; |
1859 | return 0; |
1855 | } |
1860 | } |
1856 | EXPORT_SYMBOL(drm_dp_update_payload_part1); |
1861 | EXPORT_SYMBOL(drm_dp_update_payload_part1); |
1857 | 1862 | ||
1858 | /** |
1863 | /** |
1859 | * drm_dp_update_payload_part2() - Execute payload update part 2 |
1864 | * drm_dp_update_payload_part2() - Execute payload update part 2 |
1860 | * @mgr: manager to use. |
1865 | * @mgr: manager to use. |
1861 | * |
1866 | * |
1862 | * This iterates over all proposed virtual channels, and tries to |
1867 | * This iterates over all proposed virtual channels, and tries to |
1863 | * allocate space in the link for them. For 0->slots transitions, |
1868 | * allocate space in the link for them. For 0->slots transitions, |
1864 | * this step writes the remote VC payload commands. For slots->0 |
1869 | * this step writes the remote VC payload commands. For slots->0 |
1865 | * this just resets some internal state. |
1870 | * this just resets some internal state. |
1866 | */ |
1871 | */ |
1867 | int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr) |
1872 | int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr) |
1868 | { |
1873 | { |
1869 | struct drm_dp_mst_port *port; |
1874 | struct drm_dp_mst_port *port; |
1870 | int i; |
1875 | int i; |
1871 | int ret = 0; |
1876 | int ret = 0; |
1872 | mutex_lock(&mgr->payload_lock); |
1877 | mutex_lock(&mgr->payload_lock); |
1873 | for (i = 0; i < mgr->max_payloads; i++) { |
1878 | for (i = 0; i < mgr->max_payloads; i++) { |
1874 | 1879 | ||
1875 | if (!mgr->proposed_vcpis[i]) |
1880 | if (!mgr->proposed_vcpis[i]) |
1876 | continue; |
1881 | continue; |
1877 | 1882 | ||
1878 | port = container_of(mgr->proposed_vcpis[i], struct drm_dp_mst_port, vcpi); |
1883 | port = container_of(mgr->proposed_vcpis[i], struct drm_dp_mst_port, vcpi); |
1879 | 1884 | ||
1880 | DRM_DEBUG_KMS("payload %d %d\n", i, mgr->payloads[i].payload_state); |
1885 | DRM_DEBUG_KMS("payload %d %d\n", i, mgr->payloads[i].payload_state); |
1881 | if (mgr->payloads[i].payload_state == DP_PAYLOAD_LOCAL) { |
1886 | if (mgr->payloads[i].payload_state == DP_PAYLOAD_LOCAL) { |
1882 | ret = drm_dp_create_payload_step2(mgr, port, mgr->proposed_vcpis[i]->vcpi, &mgr->payloads[i]); |
1887 | ret = drm_dp_create_payload_step2(mgr, port, mgr->proposed_vcpis[i]->vcpi, &mgr->payloads[i]); |
1883 | } else if (mgr->payloads[i].payload_state == DP_PAYLOAD_DELETE_LOCAL) { |
1888 | } else if (mgr->payloads[i].payload_state == DP_PAYLOAD_DELETE_LOCAL) { |
1884 | ret = drm_dp_destroy_payload_step2(mgr, mgr->proposed_vcpis[i]->vcpi, &mgr->payloads[i]); |
1889 | ret = drm_dp_destroy_payload_step2(mgr, mgr->proposed_vcpis[i]->vcpi, &mgr->payloads[i]); |
1885 | } |
1890 | } |
1886 | if (ret) { |
1891 | if (ret) { |
1887 | mutex_unlock(&mgr->payload_lock); |
1892 | mutex_unlock(&mgr->payload_lock); |
1888 | return ret; |
1893 | return ret; |
1889 | } |
1894 | } |
1890 | } |
1895 | } |
1891 | mutex_unlock(&mgr->payload_lock); |
1896 | mutex_unlock(&mgr->payload_lock); |
1892 | return 0; |
1897 | return 0; |
1893 | } |
1898 | } |
1894 | EXPORT_SYMBOL(drm_dp_update_payload_part2); |
1899 | EXPORT_SYMBOL(drm_dp_update_payload_part2); |
1895 | 1900 | ||
1896 | #if 0 /* unused as of yet */ |
1901 | #if 0 /* unused as of yet */ |
1897 | static int drm_dp_send_dpcd_read(struct drm_dp_mst_topology_mgr *mgr, |
1902 | static int drm_dp_send_dpcd_read(struct drm_dp_mst_topology_mgr *mgr, |
1898 | struct drm_dp_mst_port *port, |
1903 | struct drm_dp_mst_port *port, |
1899 | int offset, int size) |
1904 | int offset, int size) |
1900 | { |
1905 | { |
1901 | int len; |
1906 | int len; |
1902 | struct drm_dp_sideband_msg_tx *txmsg; |
1907 | struct drm_dp_sideband_msg_tx *txmsg; |
1903 | 1908 | ||
1904 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1909 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1905 | if (!txmsg) |
1910 | if (!txmsg) |
1906 | return -ENOMEM; |
1911 | return -ENOMEM; |
1907 | 1912 | ||
1908 | len = build_dpcd_read(txmsg, port->port_num, 0, 8); |
1913 | len = build_dpcd_read(txmsg, port->port_num, 0, 8); |
1909 | txmsg->dst = port->parent; |
1914 | txmsg->dst = port->parent; |
1910 | 1915 | ||
1911 | drm_dp_queue_down_tx(mgr, txmsg); |
1916 | drm_dp_queue_down_tx(mgr, txmsg); |
1912 | 1917 | ||
1913 | return 0; |
1918 | return 0; |
1914 | } |
1919 | } |
1915 | #endif |
1920 | #endif |
1916 | 1921 | ||
1917 | static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr, |
1922 | static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr, |
1918 | struct drm_dp_mst_port *port, |
1923 | struct drm_dp_mst_port *port, |
1919 | int offset, int size, u8 *bytes) |
1924 | int offset, int size, u8 *bytes) |
1920 | { |
1925 | { |
1921 | int len; |
1926 | int len; |
1922 | int ret; |
1927 | int ret; |
1923 | struct drm_dp_sideband_msg_tx *txmsg; |
1928 | struct drm_dp_sideband_msg_tx *txmsg; |
1924 | struct drm_dp_mst_branch *mstb; |
1929 | struct drm_dp_mst_branch *mstb; |
1925 | 1930 | ||
1926 | mstb = drm_dp_get_validated_mstb_ref(mgr, port->parent); |
1931 | mstb = drm_dp_get_validated_mstb_ref(mgr, port->parent); |
1927 | if (!mstb) |
1932 | if (!mstb) |
1928 | return -EINVAL; |
1933 | return -EINVAL; |
1929 | 1934 | ||
1930 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1935 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1931 | if (!txmsg) { |
1936 | if (!txmsg) { |
1932 | ret = -ENOMEM; |
1937 | ret = -ENOMEM; |
1933 | goto fail_put; |
1938 | goto fail_put; |
1934 | } |
1939 | } |
1935 | 1940 | ||
1936 | len = build_dpcd_write(txmsg, port->port_num, offset, size, bytes); |
1941 | len = build_dpcd_write(txmsg, port->port_num, offset, size, bytes); |
1937 | txmsg->dst = mstb; |
1942 | txmsg->dst = mstb; |
1938 | 1943 | ||
1939 | drm_dp_queue_down_tx(mgr, txmsg); |
1944 | drm_dp_queue_down_tx(mgr, txmsg); |
1940 | 1945 | ||
1941 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); |
1946 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); |
1942 | if (ret > 0) { |
1947 | if (ret > 0) { |
1943 | if (txmsg->reply.reply_type == 1) { |
1948 | if (txmsg->reply.reply_type == 1) { |
1944 | ret = -EINVAL; |
1949 | ret = -EINVAL; |
1945 | } else |
1950 | } else |
1946 | ret = 0; |
1951 | ret = 0; |
1947 | } |
1952 | } |
1948 | kfree(txmsg); |
1953 | kfree(txmsg); |
1949 | fail_put: |
1954 | fail_put: |
1950 | drm_dp_put_mst_branch_device(mstb); |
1955 | drm_dp_put_mst_branch_device(mstb); |
1951 | return ret; |
1956 | return ret; |
1952 | } |
1957 | } |
1953 | 1958 | ||
1954 | static int drm_dp_encode_up_ack_reply(struct drm_dp_sideband_msg_tx *msg, u8 req_type) |
1959 | static int drm_dp_encode_up_ack_reply(struct drm_dp_sideband_msg_tx *msg, u8 req_type) |
1955 | { |
1960 | { |
1956 | struct drm_dp_sideband_msg_reply_body reply; |
1961 | struct drm_dp_sideband_msg_reply_body reply; |
1957 | 1962 | ||
1958 | reply.reply_type = 1; |
1963 | reply.reply_type = 0; |
1959 | reply.req_type = req_type; |
1964 | reply.req_type = req_type; |
1960 | drm_dp_encode_sideband_reply(&reply, msg); |
1965 | drm_dp_encode_sideband_reply(&reply, msg); |
1961 | return 0; |
1966 | return 0; |
1962 | } |
1967 | } |
1963 | 1968 | ||
1964 | static int drm_dp_send_up_ack_reply(struct drm_dp_mst_topology_mgr *mgr, |
1969 | static int drm_dp_send_up_ack_reply(struct drm_dp_mst_topology_mgr *mgr, |
1965 | struct drm_dp_mst_branch *mstb, |
1970 | struct drm_dp_mst_branch *mstb, |
1966 | int req_type, int seqno, bool broadcast) |
1971 | int req_type, int seqno, bool broadcast) |
1967 | { |
1972 | { |
1968 | struct drm_dp_sideband_msg_tx *txmsg; |
1973 | struct drm_dp_sideband_msg_tx *txmsg; |
1969 | 1974 | ||
1970 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1975 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
1971 | if (!txmsg) |
1976 | if (!txmsg) |
1972 | return -ENOMEM; |
1977 | return -ENOMEM; |
1973 | 1978 | ||
1974 | txmsg->dst = mstb; |
1979 | txmsg->dst = mstb; |
1975 | txmsg->seqno = seqno; |
1980 | txmsg->seqno = seqno; |
1976 | drm_dp_encode_up_ack_reply(txmsg, req_type); |
1981 | drm_dp_encode_up_ack_reply(txmsg, req_type); |
1977 | 1982 | ||
1978 | mutex_lock(&mgr->qlock); |
1983 | mutex_lock(&mgr->qlock); |
1979 | 1984 | ||
1980 | process_single_up_tx_qlock(mgr, txmsg); |
1985 | process_single_up_tx_qlock(mgr, txmsg); |
1981 | 1986 | ||
1982 | mutex_unlock(&mgr->qlock); |
1987 | mutex_unlock(&mgr->qlock); |
1983 | 1988 | ||
1984 | kfree(txmsg); |
1989 | kfree(txmsg); |
1985 | return 0; |
1990 | return 0; |
1986 | } |
1991 | } |
1987 | 1992 | ||
1988 | static bool drm_dp_get_vc_payload_bw(int dp_link_bw, |
1993 | static bool drm_dp_get_vc_payload_bw(int dp_link_bw, |
1989 | int dp_link_count, |
1994 | int dp_link_count, |
1990 | int *out) |
1995 | int *out) |
1991 | { |
1996 | { |
1992 | switch (dp_link_bw) { |
1997 | switch (dp_link_bw) { |
1993 | default: |
1998 | default: |
1994 | DRM_DEBUG_KMS("invalid link bandwidth in DPCD: %x (link count: %d)\n", |
1999 | DRM_DEBUG_KMS("invalid link bandwidth in DPCD: %x (link count: %d)\n", |
1995 | dp_link_bw, dp_link_count); |
2000 | dp_link_bw, dp_link_count); |
1996 | return false; |
2001 | return false; |
1997 | 2002 | ||
1998 | case DP_LINK_BW_1_62: |
2003 | case DP_LINK_BW_1_62: |
1999 | *out = 3 * dp_link_count; |
2004 | *out = 3 * dp_link_count; |
2000 | break; |
2005 | break; |
2001 | case DP_LINK_BW_2_7: |
2006 | case DP_LINK_BW_2_7: |
2002 | *out = 5 * dp_link_count; |
2007 | *out = 5 * dp_link_count; |
2003 | break; |
2008 | break; |
2004 | case DP_LINK_BW_5_4: |
2009 | case DP_LINK_BW_5_4: |
2005 | *out = 10 * dp_link_count; |
2010 | *out = 10 * dp_link_count; |
2006 | break; |
2011 | break; |
2007 | } |
2012 | } |
2008 | return true; |
2013 | return true; |
2009 | } |
2014 | } |
2010 | 2015 | ||
2011 | /** |
2016 | /** |
2012 | * drm_dp_mst_topology_mgr_set_mst() - Set the MST state for a topology manager |
2017 | * drm_dp_mst_topology_mgr_set_mst() - Set the MST state for a topology manager |
2013 | * @mgr: manager to set state for |
2018 | * @mgr: manager to set state for |
2014 | * @mst_state: true to enable MST on this connector - false to disable. |
2019 | * @mst_state: true to enable MST on this connector - false to disable. |
2015 | * |
2020 | * |
2016 | * This is called by the driver when it detects an MST capable device plugged |
2021 | * This is called by the driver when it detects an MST capable device plugged |
2017 | * into a DP MST capable port, or when a DP MST capable device is unplugged. |
2022 | * into a DP MST capable port, or when a DP MST capable device is unplugged. |
2018 | */ |
2023 | */ |
2019 | int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state) |
2024 | int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state) |
2020 | { |
2025 | { |
2021 | int ret = 0; |
2026 | int ret = 0; |
2022 | struct drm_dp_mst_branch *mstb = NULL; |
2027 | struct drm_dp_mst_branch *mstb = NULL; |
2023 | 2028 | ||
2024 | mutex_lock(&mgr->lock); |
2029 | mutex_lock(&mgr->lock); |
2025 | if (mst_state == mgr->mst_state) |
2030 | if (mst_state == mgr->mst_state) |
2026 | goto out_unlock; |
2031 | goto out_unlock; |
2027 | 2032 | ||
2028 | mgr->mst_state = mst_state; |
2033 | mgr->mst_state = mst_state; |
2029 | /* set the device into MST mode */ |
2034 | /* set the device into MST mode */ |
2030 | if (mst_state) { |
2035 | if (mst_state) { |
2031 | WARN_ON(mgr->mst_primary); |
2036 | WARN_ON(mgr->mst_primary); |
2032 | 2037 | ||
2033 | /* get dpcd info */ |
2038 | /* get dpcd info */ |
2034 | ret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd, DP_RECEIVER_CAP_SIZE); |
2039 | ret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd, DP_RECEIVER_CAP_SIZE); |
2035 | if (ret != DP_RECEIVER_CAP_SIZE) { |
2040 | if (ret != DP_RECEIVER_CAP_SIZE) { |
2036 | DRM_DEBUG_KMS("failed to read DPCD\n"); |
2041 | DRM_DEBUG_KMS("failed to read DPCD\n"); |
2037 | goto out_unlock; |
2042 | goto out_unlock; |
2038 | } |
2043 | } |
2039 | 2044 | ||
2040 | if (!drm_dp_get_vc_payload_bw(mgr->dpcd[1], |
2045 | if (!drm_dp_get_vc_payload_bw(mgr->dpcd[1], |
2041 | mgr->dpcd[2] & DP_MAX_LANE_COUNT_MASK, |
2046 | mgr->dpcd[2] & DP_MAX_LANE_COUNT_MASK, |
2042 | &mgr->pbn_div)) { |
2047 | &mgr->pbn_div)) { |
2043 | ret = -EINVAL; |
2048 | ret = -EINVAL; |
2044 | goto out_unlock; |
2049 | goto out_unlock; |
2045 | } |
2050 | } |
2046 | 2051 | ||
2047 | mgr->total_pbn = 2560; |
2052 | mgr->total_pbn = 2560; |
2048 | mgr->total_slots = DIV_ROUND_UP(mgr->total_pbn, mgr->pbn_div); |
2053 | mgr->total_slots = DIV_ROUND_UP(mgr->total_pbn, mgr->pbn_div); |
2049 | mgr->avail_slots = mgr->total_slots; |
2054 | mgr->avail_slots = mgr->total_slots; |
2050 | 2055 | ||
2051 | /* add initial branch device at LCT 1 */ |
2056 | /* add initial branch device at LCT 1 */ |
2052 | mstb = drm_dp_add_mst_branch_device(1, NULL); |
2057 | mstb = drm_dp_add_mst_branch_device(1, NULL); |
2053 | if (mstb == NULL) { |
2058 | if (mstb == NULL) { |
2054 | ret = -ENOMEM; |
2059 | ret = -ENOMEM; |
2055 | goto out_unlock; |
2060 | goto out_unlock; |
2056 | } |
2061 | } |
2057 | mstb->mgr = mgr; |
2062 | mstb->mgr = mgr; |
2058 | 2063 | ||
2059 | /* give this the main reference */ |
2064 | /* give this the main reference */ |
2060 | mgr->mst_primary = mstb; |
2065 | mgr->mst_primary = mstb; |
2061 | kref_get(&mgr->mst_primary->kref); |
2066 | kref_get(&mgr->mst_primary->kref); |
2062 | 2067 | ||
2063 | ret = drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL, |
2068 | ret = drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL, |
2064 | DP_MST_EN | DP_UP_REQ_EN | DP_UPSTREAM_IS_SRC); |
2069 | DP_MST_EN | DP_UP_REQ_EN | DP_UPSTREAM_IS_SRC); |
2065 | if (ret < 0) { |
2070 | if (ret < 0) { |
2066 | goto out_unlock; |
2071 | goto out_unlock; |
2067 | } |
2072 | } |
2068 | 2073 | ||
2069 | { |
2074 | { |
2070 | struct drm_dp_payload reset_pay; |
2075 | struct drm_dp_payload reset_pay; |
2071 | reset_pay.start_slot = 0; |
2076 | reset_pay.start_slot = 0; |
2072 | reset_pay.num_slots = 0x3f; |
2077 | reset_pay.num_slots = 0x3f; |
2073 | drm_dp_dpcd_write_payload(mgr, 0, &reset_pay); |
2078 | drm_dp_dpcd_write_payload(mgr, 0, &reset_pay); |
2074 | } |
2079 | } |
2075 | 2080 | ||
2076 | // queue_work(system_long_wq, &mgr->work); |
2081 | // queue_work(system_long_wq, &mgr->work); |
2077 | 2082 | ||
2078 | ret = 0; |
2083 | ret = 0; |
2079 | } else { |
2084 | } else { |
2080 | /* disable MST on the device */ |
2085 | /* disable MST on the device */ |
2081 | mstb = mgr->mst_primary; |
2086 | mstb = mgr->mst_primary; |
2082 | mgr->mst_primary = NULL; |
2087 | mgr->mst_primary = NULL; |
2083 | /* this can fail if the device is gone */ |
2088 | /* this can fail if the device is gone */ |
2084 | drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL, 0); |
2089 | drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL, 0); |
2085 | ret = 0; |
2090 | ret = 0; |
2086 | memset(mgr->payloads, 0, mgr->max_payloads * sizeof(struct drm_dp_payload)); |
2091 | memset(mgr->payloads, 0, mgr->max_payloads * sizeof(struct drm_dp_payload)); |
2087 | mgr->payload_mask = 0; |
2092 | mgr->payload_mask = 0; |
2088 | set_bit(0, &mgr->payload_mask); |
2093 | set_bit(0, &mgr->payload_mask); |
2089 | mgr->vcpi_mask = 0; |
2094 | mgr->vcpi_mask = 0; |
2090 | } |
2095 | } |
2091 | 2096 | ||
2092 | out_unlock: |
2097 | out_unlock: |
2093 | mutex_unlock(&mgr->lock); |
2098 | mutex_unlock(&mgr->lock); |
2094 | if (mstb) |
2099 | if (mstb) |
2095 | drm_dp_put_mst_branch_device(mstb); |
2100 | drm_dp_put_mst_branch_device(mstb); |
2096 | return ret; |
2101 | return ret; |
2097 | 2102 | ||
2098 | } |
2103 | } |
2099 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_set_mst); |
2104 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_set_mst); |
2100 | 2105 | ||
2101 | /** |
2106 | /** |
2102 | * drm_dp_mst_topology_mgr_suspend() - suspend the MST manager |
2107 | * drm_dp_mst_topology_mgr_suspend() - suspend the MST manager |
2103 | * @mgr: manager to suspend |
2108 | * @mgr: manager to suspend |
2104 | * |
2109 | * |
2105 | * This function tells the MST device that we can't handle UP messages |
2110 | * This function tells the MST device that we can't handle UP messages |
2106 | * anymore. This should stop it from sending any since we are suspended. |
2111 | * anymore. This should stop it from sending any since we are suspended. |
2107 | */ |
2112 | */ |
2108 | void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr) |
2113 | void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr) |
2109 | { |
2114 | { |
2110 | mutex_lock(&mgr->lock); |
2115 | mutex_lock(&mgr->lock); |
2111 | drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL, |
2116 | drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL, |
2112 | DP_MST_EN | DP_UPSTREAM_IS_SRC); |
2117 | DP_MST_EN | DP_UPSTREAM_IS_SRC); |
2113 | mutex_unlock(&mgr->lock); |
2118 | mutex_unlock(&mgr->lock); |
2114 | } |
2119 | } |
2115 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_suspend); |
2120 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_suspend); |
2116 | 2121 | ||
2117 | /** |
2122 | /** |
2118 | * drm_dp_mst_topology_mgr_resume() - resume the MST manager |
2123 | * drm_dp_mst_topology_mgr_resume() - resume the MST manager |
2119 | * @mgr: manager to resume |
2124 | * @mgr: manager to resume |
2120 | * |
2125 | * |
2121 | * This will fetch DPCD and see if the device is still there, |
2126 | * This will fetch DPCD and see if the device is still there, |
2122 | * if it is, it will rewrite the MSTM control bits, and return. |
2127 | * if it is, it will rewrite the MSTM control bits, and return. |
2123 | * |
2128 | * |
2124 | * if the device fails this returns -1, and the driver should do |
2129 | * if the device fails this returns -1, and the driver should do |
2125 | * a full MST reprobe, in case we were undocked. |
2130 | * a full MST reprobe, in case we were undocked. |
2126 | */ |
2131 | */ |
2127 | int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr) |
2132 | int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr) |
2128 | { |
2133 | { |
2129 | int ret = 0; |
2134 | int ret = 0; |
2130 | 2135 | ||
2131 | mutex_lock(&mgr->lock); |
2136 | mutex_lock(&mgr->lock); |
2132 | 2137 | ||
2133 | if (mgr->mst_primary) { |
2138 | if (mgr->mst_primary) { |
2134 | int sret; |
2139 | int sret; |
2135 | u8 guid[16]; |
2140 | u8 guid[16]; |
2136 | 2141 | ||
2137 | sret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd, DP_RECEIVER_CAP_SIZE); |
2142 | sret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd, DP_RECEIVER_CAP_SIZE); |
2138 | if (sret != DP_RECEIVER_CAP_SIZE) { |
2143 | if (sret != DP_RECEIVER_CAP_SIZE) { |
2139 | DRM_DEBUG_KMS("dpcd read failed - undocked during suspend?\n"); |
2144 | DRM_DEBUG_KMS("dpcd read failed - undocked during suspend?\n"); |
2140 | ret = -1; |
2145 | ret = -1; |
2141 | goto out_unlock; |
2146 | goto out_unlock; |
2142 | } |
2147 | } |
2143 | 2148 | ||
2144 | ret = drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL, |
2149 | ret = drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL, |
2145 | DP_MST_EN | DP_UP_REQ_EN | DP_UPSTREAM_IS_SRC); |
2150 | DP_MST_EN | DP_UP_REQ_EN | DP_UPSTREAM_IS_SRC); |
2146 | if (ret < 0) { |
2151 | if (ret < 0) { |
2147 | DRM_DEBUG_KMS("mst write failed - undocked during suspend?\n"); |
2152 | DRM_DEBUG_KMS("mst write failed - undocked during suspend?\n"); |
2148 | ret = -1; |
2153 | ret = -1; |
2149 | goto out_unlock; |
2154 | goto out_unlock; |
2150 | } |
2155 | } |
2151 | 2156 | ||
2152 | /* Some hubs forget their guids after they resume */ |
2157 | /* Some hubs forget their guids after they resume */ |
2153 | sret = drm_dp_dpcd_read(mgr->aux, DP_GUID, guid, 16); |
2158 | sret = drm_dp_dpcd_read(mgr->aux, DP_GUID, guid, 16); |
2154 | if (sret != 16) { |
2159 | if (sret != 16) { |
2155 | DRM_DEBUG_KMS("dpcd read failed - undocked during suspend?\n"); |
2160 | DRM_DEBUG_KMS("dpcd read failed - undocked during suspend?\n"); |
2156 | ret = -1; |
2161 | ret = -1; |
2157 | goto out_unlock; |
2162 | goto out_unlock; |
2158 | } |
2163 | } |
2159 | drm_dp_check_mstb_guid(mgr->mst_primary, guid); |
2164 | drm_dp_check_mstb_guid(mgr->mst_primary, guid); |
2160 | 2165 | ||
2161 | ret = 0; |
2166 | ret = 0; |
2162 | } else |
2167 | } else |
2163 | ret = -1; |
2168 | ret = -1; |
2164 | 2169 | ||
2165 | out_unlock: |
2170 | out_unlock: |
2166 | mutex_unlock(&mgr->lock); |
2171 | mutex_unlock(&mgr->lock); |
2167 | return ret; |
2172 | return ret; |
2168 | } |
2173 | } |
2169 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_resume); |
2174 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_resume); |
2170 | 2175 | ||
2171 | static void drm_dp_get_one_sb_msg(struct drm_dp_mst_topology_mgr *mgr, bool up) |
2176 | static void drm_dp_get_one_sb_msg(struct drm_dp_mst_topology_mgr *mgr, bool up) |
2172 | { |
2177 | { |
2173 | int len; |
2178 | int len; |
2174 | u8 replyblock[32]; |
2179 | u8 replyblock[32]; |
2175 | int replylen, origlen, curreply; |
2180 | int replylen, origlen, curreply; |
2176 | int ret; |
2181 | int ret; |
2177 | struct drm_dp_sideband_msg_rx *msg; |
2182 | struct drm_dp_sideband_msg_rx *msg; |
2178 | int basereg = up ? DP_SIDEBAND_MSG_UP_REQ_BASE : DP_SIDEBAND_MSG_DOWN_REP_BASE; |
2183 | int basereg = up ? DP_SIDEBAND_MSG_UP_REQ_BASE : DP_SIDEBAND_MSG_DOWN_REP_BASE; |
2179 | msg = up ? &mgr->up_req_recv : &mgr->down_rep_recv; |
2184 | msg = up ? &mgr->up_req_recv : &mgr->down_rep_recv; |
2180 | 2185 | ||
2181 | len = min(mgr->max_dpcd_transaction_bytes, 16); |
2186 | len = min(mgr->max_dpcd_transaction_bytes, 16); |
2182 | ret = drm_dp_dpcd_read(mgr->aux, basereg, |
2187 | ret = drm_dp_dpcd_read(mgr->aux, basereg, |
2183 | replyblock, len); |
2188 | replyblock, len); |
2184 | if (ret != len) { |
2189 | if (ret != len) { |
2185 | DRM_DEBUG_KMS("failed to read DPCD down rep %d %d\n", len, ret); |
2190 | DRM_DEBUG_KMS("failed to read DPCD down rep %d %d\n", len, ret); |
2186 | return; |
2191 | return; |
2187 | } |
2192 | } |
2188 | ret = drm_dp_sideband_msg_build(msg, replyblock, len, true); |
2193 | ret = drm_dp_sideband_msg_build(msg, replyblock, len, true); |
2189 | if (!ret) { |
2194 | if (!ret) { |
2190 | DRM_DEBUG_KMS("sideband msg build failed %d\n", replyblock[0]); |
2195 | DRM_DEBUG_KMS("sideband msg build failed %d\n", replyblock[0]); |
2191 | return; |
2196 | return; |
2192 | } |
2197 | } |
2193 | replylen = msg->curchunk_len + msg->curchunk_hdrlen; |
2198 | replylen = msg->curchunk_len + msg->curchunk_hdrlen; |
2194 | 2199 | ||
2195 | origlen = replylen; |
2200 | origlen = replylen; |
2196 | replylen -= len; |
2201 | replylen -= len; |
2197 | curreply = len; |
2202 | curreply = len; |
2198 | while (replylen > 0) { |
2203 | while (replylen > 0) { |
2199 | len = min3(replylen, mgr->max_dpcd_transaction_bytes, 16); |
2204 | len = min3(replylen, mgr->max_dpcd_transaction_bytes, 16); |
2200 | ret = drm_dp_dpcd_read(mgr->aux, basereg + curreply, |
2205 | ret = drm_dp_dpcd_read(mgr->aux, basereg + curreply, |
2201 | replyblock, len); |
2206 | replyblock, len); |
2202 | if (ret != len) { |
2207 | if (ret != len) { |
2203 | DRM_DEBUG_KMS("failed to read a chunk\n"); |
2208 | DRM_DEBUG_KMS("failed to read a chunk\n"); |
2204 | } |
2209 | } |
2205 | ret = drm_dp_sideband_msg_build(msg, replyblock, len, false); |
2210 | ret = drm_dp_sideband_msg_build(msg, replyblock, len, false); |
2206 | if (ret == false) |
2211 | if (ret == false) |
2207 | DRM_DEBUG_KMS("failed to build sideband msg\n"); |
2212 | DRM_DEBUG_KMS("failed to build sideband msg\n"); |
2208 | curreply += len; |
2213 | curreply += len; |
2209 | replylen -= len; |
2214 | replylen -= len; |
2210 | } |
2215 | } |
2211 | } |
2216 | } |
2212 | 2217 | ||
2213 | static int drm_dp_mst_handle_down_rep(struct drm_dp_mst_topology_mgr *mgr) |
2218 | static int drm_dp_mst_handle_down_rep(struct drm_dp_mst_topology_mgr *mgr) |
2214 | { |
2219 | { |
2215 | int ret = 0; |
2220 | int ret = 0; |
2216 | 2221 | ||
2217 | drm_dp_get_one_sb_msg(mgr, false); |
2222 | drm_dp_get_one_sb_msg(mgr, false); |
2218 | 2223 | ||
2219 | if (mgr->down_rep_recv.have_eomt) { |
2224 | if (mgr->down_rep_recv.have_eomt) { |
2220 | struct drm_dp_sideband_msg_tx *txmsg; |
2225 | struct drm_dp_sideband_msg_tx *txmsg; |
2221 | struct drm_dp_mst_branch *mstb; |
2226 | struct drm_dp_mst_branch *mstb; |
2222 | int slot = -1; |
2227 | int slot = -1; |
2223 | mstb = drm_dp_get_mst_branch_device(mgr, |
2228 | mstb = drm_dp_get_mst_branch_device(mgr, |
2224 | mgr->down_rep_recv.initial_hdr.lct, |
2229 | mgr->down_rep_recv.initial_hdr.lct, |
2225 | mgr->down_rep_recv.initial_hdr.rad); |
2230 | mgr->down_rep_recv.initial_hdr.rad); |
2226 | 2231 | ||
2227 | if (!mstb) { |
2232 | if (!mstb) { |
2228 | DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->down_rep_recv.initial_hdr.lct); |
2233 | DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->down_rep_recv.initial_hdr.lct); |
2229 | memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2234 | memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2230 | return 0; |
2235 | return 0; |
2231 | } |
2236 | } |
2232 | 2237 | ||
2233 | /* find the message */ |
2238 | /* find the message */ |
2234 | slot = mgr->down_rep_recv.initial_hdr.seqno; |
2239 | slot = mgr->down_rep_recv.initial_hdr.seqno; |
2235 | mutex_lock(&mgr->qlock); |
2240 | mutex_lock(&mgr->qlock); |
2236 | txmsg = mstb->tx_slots[slot]; |
2241 | txmsg = mstb->tx_slots[slot]; |
2237 | /* remove from slots */ |
2242 | /* remove from slots */ |
2238 | mutex_unlock(&mgr->qlock); |
2243 | mutex_unlock(&mgr->qlock); |
2239 | 2244 | ||
2240 | if (!txmsg) { |
2245 | if (!txmsg) { |
2241 | DRM_DEBUG_KMS("Got MST reply with no msg %p %d %d %02x %02x\n", |
2246 | DRM_DEBUG_KMS("Got MST reply with no msg %p %d %d %02x %02x\n", |
2242 | mstb, |
2247 | mstb, |
2243 | mgr->down_rep_recv.initial_hdr.seqno, |
2248 | mgr->down_rep_recv.initial_hdr.seqno, |
2244 | mgr->down_rep_recv.initial_hdr.lct, |
2249 | mgr->down_rep_recv.initial_hdr.lct, |
2245 | mgr->down_rep_recv.initial_hdr.rad[0], |
2250 | mgr->down_rep_recv.initial_hdr.rad[0], |
2246 | mgr->down_rep_recv.msg[0]); |
2251 | mgr->down_rep_recv.msg[0]); |
2247 | drm_dp_put_mst_branch_device(mstb); |
2252 | drm_dp_put_mst_branch_device(mstb); |
2248 | memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2253 | memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2249 | return 0; |
2254 | return 0; |
2250 | } |
2255 | } |
2251 | 2256 | ||
2252 | drm_dp_sideband_parse_reply(&mgr->down_rep_recv, &txmsg->reply); |
2257 | drm_dp_sideband_parse_reply(&mgr->down_rep_recv, &txmsg->reply); |
2253 | if (txmsg->reply.reply_type == 1) { |
2258 | if (txmsg->reply.reply_type == 1) { |
2254 | DRM_DEBUG_KMS("Got NAK reply: req 0x%02x, reason 0x%02x, nak data 0x%02x\n", txmsg->reply.req_type, txmsg->reply.u.nak.reason, txmsg->reply.u.nak.nak_data); |
2259 | DRM_DEBUG_KMS("Got NAK reply: req 0x%02x, reason 0x%02x, nak data 0x%02x\n", txmsg->reply.req_type, txmsg->reply.u.nak.reason, txmsg->reply.u.nak.nak_data); |
2255 | } |
2260 | } |
2256 | 2261 | ||
2257 | memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2262 | memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2258 | drm_dp_put_mst_branch_device(mstb); |
2263 | drm_dp_put_mst_branch_device(mstb); |
2259 | 2264 | ||
2260 | mutex_lock(&mgr->qlock); |
2265 | mutex_lock(&mgr->qlock); |
2261 | txmsg->state = DRM_DP_SIDEBAND_TX_RX; |
2266 | txmsg->state = DRM_DP_SIDEBAND_TX_RX; |
2262 | mstb->tx_slots[slot] = NULL; |
2267 | mstb->tx_slots[slot] = NULL; |
2263 | mutex_unlock(&mgr->qlock); |
2268 | mutex_unlock(&mgr->qlock); |
2264 | 2269 | ||
2265 | // wake_up(&mgr->tx_waitq); |
2270 | // wake_up(&mgr->tx_waitq); |
2266 | } |
2271 | } |
2267 | return ret; |
2272 | return ret; |
2268 | } |
2273 | } |
2269 | 2274 | ||
2270 | static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr) |
2275 | static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr) |
2271 | { |
2276 | { |
2272 | int ret = 0; |
2277 | int ret = 0; |
2273 | drm_dp_get_one_sb_msg(mgr, true); |
2278 | drm_dp_get_one_sb_msg(mgr, true); |
2274 | 2279 | ||
2275 | if (mgr->up_req_recv.have_eomt) { |
2280 | if (mgr->up_req_recv.have_eomt) { |
2276 | struct drm_dp_sideband_msg_req_body msg; |
2281 | struct drm_dp_sideband_msg_req_body msg; |
2277 | struct drm_dp_mst_branch *mstb = NULL; |
2282 | struct drm_dp_mst_branch *mstb = NULL; |
2278 | bool seqno; |
2283 | bool seqno; |
2279 | 2284 | ||
2280 | if (!mgr->up_req_recv.initial_hdr.broadcast) { |
2285 | if (!mgr->up_req_recv.initial_hdr.broadcast) { |
2281 | mstb = drm_dp_get_mst_branch_device(mgr, |
2286 | mstb = drm_dp_get_mst_branch_device(mgr, |
2282 | mgr->up_req_recv.initial_hdr.lct, |
2287 | mgr->up_req_recv.initial_hdr.lct, |
2283 | mgr->up_req_recv.initial_hdr.rad); |
2288 | mgr->up_req_recv.initial_hdr.rad); |
2284 | if (!mstb) { |
2289 | if (!mstb) { |
2285 | DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct); |
2290 | DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct); |
2286 | memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2291 | memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2287 | return 0; |
2292 | return 0; |
2288 | } |
2293 | } |
2289 | } |
2294 | } |
2290 | 2295 | ||
2291 | seqno = mgr->up_req_recv.initial_hdr.seqno; |
2296 | seqno = mgr->up_req_recv.initial_hdr.seqno; |
2292 | drm_dp_sideband_parse_req(&mgr->up_req_recv, &msg); |
2297 | drm_dp_sideband_parse_req(&mgr->up_req_recv, &msg); |
2293 | 2298 | ||
2294 | if (msg.req_type == DP_CONNECTION_STATUS_NOTIFY) { |
2299 | if (msg.req_type == DP_CONNECTION_STATUS_NOTIFY) { |
2295 | drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false); |
2300 | drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false); |
2296 | 2301 | ||
2297 | if (!mstb) |
2302 | if (!mstb) |
2298 | mstb = drm_dp_get_mst_branch_device_by_guid(mgr, msg.u.conn_stat.guid); |
2303 | mstb = drm_dp_get_mst_branch_device_by_guid(mgr, msg.u.conn_stat.guid); |
2299 | 2304 | ||
2300 | if (!mstb) { |
2305 | if (!mstb) { |
2301 | DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct); |
2306 | DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct); |
2302 | memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2307 | memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2303 | return 0; |
2308 | return 0; |
2304 | } |
2309 | } |
2305 | 2310 | ||
2306 | drm_dp_update_port(mstb, &msg.u.conn_stat); |
2311 | drm_dp_update_port(mstb, &msg.u.conn_stat); |
2307 | 2312 | ||
2308 | DRM_DEBUG_KMS("Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n", msg.u.conn_stat.port_number, msg.u.conn_stat.legacy_device_plug_status, msg.u.conn_stat.displayport_device_plug_status, msg.u.conn_stat.message_capability_status, msg.u.conn_stat.input_port, msg.u.conn_stat.peer_device_type); |
2313 | DRM_DEBUG_KMS("Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n", msg.u.conn_stat.port_number, msg.u.conn_stat.legacy_device_plug_status, msg.u.conn_stat.displayport_device_plug_status, msg.u.conn_stat.message_capability_status, msg.u.conn_stat.input_port, msg.u.conn_stat.peer_device_type); |
2309 | (*mgr->cbs->hotplug)(mgr); |
2314 | (*mgr->cbs->hotplug)(mgr); |
2310 | 2315 | ||
2311 | } else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY) { |
2316 | } else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY) { |
2312 | drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false); |
2317 | drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false); |
2313 | if (!mstb) |
2318 | if (!mstb) |
2314 | mstb = drm_dp_get_mst_branch_device_by_guid(mgr, msg.u.resource_stat.guid); |
2319 | mstb = drm_dp_get_mst_branch_device_by_guid(mgr, msg.u.resource_stat.guid); |
2315 | 2320 | ||
2316 | if (!mstb) { |
2321 | if (!mstb) { |
2317 | DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct); |
2322 | DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct); |
2318 | memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2323 | memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2319 | return 0; |
2324 | return 0; |
2320 | } |
2325 | } |
2321 | 2326 | ||
2322 | DRM_DEBUG_KMS("Got RSN: pn: %d avail_pbn %d\n", msg.u.resource_stat.port_number, msg.u.resource_stat.available_pbn); |
2327 | DRM_DEBUG_KMS("Got RSN: pn: %d avail_pbn %d\n", msg.u.resource_stat.port_number, msg.u.resource_stat.available_pbn); |
2323 | } |
2328 | } |
2324 | 2329 | ||
2325 | drm_dp_put_mst_branch_device(mstb); |
2330 | drm_dp_put_mst_branch_device(mstb); |
2326 | memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2331 | memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); |
2327 | } |
2332 | } |
2328 | return ret; |
2333 | return ret; |
2329 | } |
2334 | } |
2330 | 2335 | ||
2331 | /** |
2336 | /** |
2332 | * drm_dp_mst_hpd_irq() - MST hotplug IRQ notify |
2337 | * drm_dp_mst_hpd_irq() - MST hotplug IRQ notify |
2333 | * @mgr: manager to notify irq for. |
2338 | * @mgr: manager to notify irq for. |
2334 | * @esi: 4 bytes from SINK_COUNT_ESI |
2339 | * @esi: 4 bytes from SINK_COUNT_ESI |
2335 | * @handled: whether the hpd interrupt was consumed or not |
2340 | * @handled: whether the hpd interrupt was consumed or not |
2336 | * |
2341 | * |
2337 | * This should be called from the driver when it detects a short IRQ, |
2342 | * This should be called from the driver when it detects a short IRQ, |
2338 | * along with the value of the DEVICE_SERVICE_IRQ_VECTOR_ESI0. The |
2343 | * along with the value of the DEVICE_SERVICE_IRQ_VECTOR_ESI0. The |
2339 | * topology manager will process the sideband messages received as a result |
2344 | * topology manager will process the sideband messages received as a result |
2340 | * of this. |
2345 | * of this. |
2341 | */ |
2346 | */ |
2342 | int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled) |
2347 | int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled) |
2343 | { |
2348 | { |
2344 | int ret = 0; |
2349 | int ret = 0; |
2345 | int sc; |
2350 | int sc; |
2346 | *handled = false; |
2351 | *handled = false; |
2347 | sc = esi[0] & 0x3f; |
2352 | sc = esi[0] & 0x3f; |
2348 | 2353 | ||
2349 | if (sc != mgr->sink_count) { |
2354 | if (sc != mgr->sink_count) { |
2350 | mgr->sink_count = sc; |
2355 | mgr->sink_count = sc; |
2351 | *handled = true; |
2356 | *handled = true; |
2352 | } |
2357 | } |
2353 | 2358 | ||
2354 | if (esi[1] & DP_DOWN_REP_MSG_RDY) { |
2359 | if (esi[1] & DP_DOWN_REP_MSG_RDY) { |
2355 | ret = drm_dp_mst_handle_down_rep(mgr); |
2360 | ret = drm_dp_mst_handle_down_rep(mgr); |
2356 | *handled = true; |
2361 | *handled = true; |
2357 | } |
2362 | } |
2358 | 2363 | ||
2359 | if (esi[1] & DP_UP_REQ_MSG_RDY) { |
2364 | if (esi[1] & DP_UP_REQ_MSG_RDY) { |
2360 | ret |= drm_dp_mst_handle_up_req(mgr); |
2365 | ret |= drm_dp_mst_handle_up_req(mgr); |
2361 | *handled = true; |
2366 | *handled = true; |
2362 | } |
2367 | } |
2363 | 2368 | ||
2364 | drm_dp_mst_kick_tx(mgr); |
2369 | drm_dp_mst_kick_tx(mgr); |
2365 | return ret; |
2370 | return ret; |
2366 | } |
2371 | } |
2367 | EXPORT_SYMBOL(drm_dp_mst_hpd_irq); |
2372 | EXPORT_SYMBOL(drm_dp_mst_hpd_irq); |
2368 | 2373 | ||
2369 | /** |
2374 | /** |
2370 | * drm_dp_mst_detect_port() - get connection status for an MST port |
2375 | * drm_dp_mst_detect_port() - get connection status for an MST port |
2371 | * @mgr: manager for this port |
2376 | * @mgr: manager for this port |
2372 | * @port: unverified pointer to a port |
2377 | * @port: unverified pointer to a port |
2373 | * |
2378 | * |
2374 | * This returns the current connection state for a port. It validates the |
2379 | * This returns the current connection state for a port. It validates the |
2375 | * port pointer still exists so the caller doesn't require a reference |
2380 | * port pointer still exists so the caller doesn't require a reference |
2376 | */ |
2381 | */ |
2377 | enum drm_connector_status drm_dp_mst_detect_port(struct drm_connector *connector, |
2382 | enum drm_connector_status drm_dp_mst_detect_port(struct drm_connector *connector, |
2378 | struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
2383 | struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
2379 | { |
2384 | { |
2380 | enum drm_connector_status status = connector_status_disconnected; |
2385 | enum drm_connector_status status = connector_status_disconnected; |
2381 | 2386 | ||
2382 | /* we need to search for the port in the mgr in case its gone */ |
2387 | /* we need to search for the port in the mgr in case its gone */ |
2383 | port = drm_dp_get_validated_port_ref(mgr, port); |
2388 | port = drm_dp_get_validated_port_ref(mgr, port); |
2384 | if (!port) |
2389 | if (!port) |
2385 | return connector_status_disconnected; |
2390 | return connector_status_disconnected; |
2386 | 2391 | ||
2387 | if (!port->ddps) |
2392 | if (!port->ddps) |
2388 | goto out; |
2393 | goto out; |
2389 | 2394 | ||
2390 | switch (port->pdt) { |
2395 | switch (port->pdt) { |
2391 | case DP_PEER_DEVICE_NONE: |
2396 | case DP_PEER_DEVICE_NONE: |
2392 | case DP_PEER_DEVICE_MST_BRANCHING: |
2397 | case DP_PEER_DEVICE_MST_BRANCHING: |
2393 | break; |
2398 | break; |
2394 | 2399 | ||
2395 | case DP_PEER_DEVICE_SST_SINK: |
2400 | case DP_PEER_DEVICE_SST_SINK: |
2396 | status = connector_status_connected; |
2401 | status = connector_status_connected; |
2397 | /* for logical ports - cache the EDID */ |
2402 | /* for logical ports - cache the EDID */ |
2398 | if (port->port_num >= 8 && !port->cached_edid) { |
2403 | if (port->port_num >= 8 && !port->cached_edid) { |
2399 | port->cached_edid = drm_get_edid(connector, &port->aux.ddc); |
2404 | port->cached_edid = drm_get_edid(connector, &port->aux.ddc); |
2400 | } |
2405 | } |
2401 | break; |
2406 | break; |
2402 | case DP_PEER_DEVICE_DP_LEGACY_CONV: |
2407 | case DP_PEER_DEVICE_DP_LEGACY_CONV: |
2403 | if (port->ldps) |
2408 | if (port->ldps) |
2404 | status = connector_status_connected; |
2409 | status = connector_status_connected; |
2405 | break; |
2410 | break; |
2406 | } |
2411 | } |
2407 | out: |
2412 | out: |
2408 | drm_dp_put_port(port); |
2413 | drm_dp_put_port(port); |
2409 | return status; |
2414 | return status; |
2410 | } |
2415 | } |
2411 | EXPORT_SYMBOL(drm_dp_mst_detect_port); |
2416 | EXPORT_SYMBOL(drm_dp_mst_detect_port); |
2412 | 2417 | ||
2413 | /** |
2418 | /** |
- | 2419 | * drm_dp_mst_port_has_audio() - Check whether port has audio capability or not |
|
- | 2420 | * @mgr: manager for this port |
|
- | 2421 | * @port: unverified pointer to a port. |
|
- | 2422 | * |
|
- | 2423 | * This returns whether the port supports audio or not. |
|
- | 2424 | */ |
|
- | 2425 | bool drm_dp_mst_port_has_audio(struct drm_dp_mst_topology_mgr *mgr, |
|
- | 2426 | struct drm_dp_mst_port *port) |
|
- | 2427 | { |
|
- | 2428 | bool ret = false; |
|
- | 2429 | ||
- | 2430 | port = drm_dp_get_validated_port_ref(mgr, port); |
|
- | 2431 | if (!port) |
|
- | 2432 | return ret; |
|
- | 2433 | ret = port->has_audio; |
|
- | 2434 | drm_dp_put_port(port); |
|
- | 2435 | return ret; |
|
- | 2436 | } |
|
- | 2437 | EXPORT_SYMBOL(drm_dp_mst_port_has_audio); |
|
- | 2438 | ||
- | 2439 | /** |
|
2414 | * drm_dp_mst_get_edid() - get EDID for an MST port |
2440 | * drm_dp_mst_get_edid() - get EDID for an MST port |
2415 | * @connector: toplevel connector to get EDID for |
2441 | * @connector: toplevel connector to get EDID for |
2416 | * @mgr: manager for this port |
2442 | * @mgr: manager for this port |
2417 | * @port: unverified pointer to a port. |
2443 | * @port: unverified pointer to a port. |
2418 | * |
2444 | * |
2419 | * This returns an EDID for the port connected to a connector, |
2445 | * This returns an EDID for the port connected to a connector, |
2420 | * It validates the pointer still exists so the caller doesn't require a |
2446 | * It validates the pointer still exists so the caller doesn't require a |
2421 | * reference. |
2447 | * reference. |
2422 | */ |
2448 | */ |
2423 | struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
2449 | struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
2424 | { |
2450 | { |
2425 | struct edid *edid = NULL; |
2451 | struct edid *edid = NULL; |
2426 | 2452 | ||
2427 | /* we need to search for the port in the mgr in case its gone */ |
2453 | /* we need to search for the port in the mgr in case its gone */ |
2428 | port = drm_dp_get_validated_port_ref(mgr, port); |
2454 | port = drm_dp_get_validated_port_ref(mgr, port); |
2429 | if (!port) |
2455 | if (!port) |
2430 | return NULL; |
2456 | return NULL; |
2431 | 2457 | ||
2432 | if (port->cached_edid) |
2458 | if (port->cached_edid) |
2433 | edid = drm_edid_duplicate(port->cached_edid); |
2459 | edid = drm_edid_duplicate(port->cached_edid); |
2434 | else { |
2460 | else { |
2435 | edid = drm_get_edid(connector, &port->aux.ddc); |
2461 | edid = drm_get_edid(connector, &port->aux.ddc); |
2436 | drm_mode_connector_set_tile_property(connector); |
2462 | drm_mode_connector_set_tile_property(connector); |
2437 | } |
2463 | } |
- | 2464 | port->has_audio = drm_detect_monitor_audio(edid); |
|
2438 | drm_dp_put_port(port); |
2465 | drm_dp_put_port(port); |
2439 | return edid; |
2466 | return edid; |
2440 | } |
2467 | } |
2441 | EXPORT_SYMBOL(drm_dp_mst_get_edid); |
2468 | EXPORT_SYMBOL(drm_dp_mst_get_edid); |
2442 | 2469 | ||
2443 | /** |
2470 | /** |
2444 | * drm_dp_find_vcpi_slots() - find slots for this PBN value |
2471 | * drm_dp_find_vcpi_slots() - find slots for this PBN value |
2445 | * @mgr: manager to use |
2472 | * @mgr: manager to use |
2446 | * @pbn: payload bandwidth to convert into slots. |
2473 | * @pbn: payload bandwidth to convert into slots. |
2447 | */ |
2474 | */ |
2448 | int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, |
2475 | int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, |
2449 | int pbn) |
2476 | int pbn) |
2450 | { |
2477 | { |
2451 | int num_slots; |
2478 | int num_slots; |
2452 | 2479 | ||
2453 | num_slots = DIV_ROUND_UP(pbn, mgr->pbn_div); |
2480 | num_slots = DIV_ROUND_UP(pbn, mgr->pbn_div); |
2454 | 2481 | ||
2455 | if (num_slots > mgr->avail_slots) |
2482 | if (num_slots > mgr->avail_slots) |
2456 | return -ENOSPC; |
2483 | return -ENOSPC; |
2457 | return num_slots; |
2484 | return num_slots; |
2458 | } |
2485 | } |
2459 | EXPORT_SYMBOL(drm_dp_find_vcpi_slots); |
2486 | EXPORT_SYMBOL(drm_dp_find_vcpi_slots); |
2460 | 2487 | ||
2461 | static int drm_dp_init_vcpi(struct drm_dp_mst_topology_mgr *mgr, |
2488 | static int drm_dp_init_vcpi(struct drm_dp_mst_topology_mgr *mgr, |
2462 | struct drm_dp_vcpi *vcpi, int pbn) |
2489 | struct drm_dp_vcpi *vcpi, int pbn) |
2463 | { |
2490 | { |
2464 | int num_slots; |
2491 | int num_slots; |
2465 | int ret; |
2492 | int ret; |
2466 | 2493 | ||
2467 | num_slots = DIV_ROUND_UP(pbn, mgr->pbn_div); |
2494 | num_slots = DIV_ROUND_UP(pbn, mgr->pbn_div); |
2468 | 2495 | ||
2469 | if (num_slots > mgr->avail_slots) |
2496 | if (num_slots > mgr->avail_slots) |
2470 | return -ENOSPC; |
2497 | return -ENOSPC; |
2471 | 2498 | ||
2472 | vcpi->pbn = pbn; |
2499 | vcpi->pbn = pbn; |
2473 | vcpi->aligned_pbn = num_slots * mgr->pbn_div; |
2500 | vcpi->aligned_pbn = num_slots * mgr->pbn_div; |
2474 | vcpi->num_slots = num_slots; |
2501 | vcpi->num_slots = num_slots; |
2475 | 2502 | ||
2476 | ret = drm_dp_mst_assign_payload_id(mgr, vcpi); |
2503 | ret = drm_dp_mst_assign_payload_id(mgr, vcpi); |
2477 | if (ret < 0) |
2504 | if (ret < 0) |
2478 | return ret; |
2505 | return ret; |
2479 | return 0; |
2506 | return 0; |
2480 | } |
2507 | } |
2481 | 2508 | ||
2482 | /** |
2509 | /** |
2483 | * drm_dp_mst_allocate_vcpi() - Allocate a virtual channel |
2510 | * drm_dp_mst_allocate_vcpi() - Allocate a virtual channel |
2484 | * @mgr: manager for this port |
2511 | * @mgr: manager for this port |
2485 | * @port: port to allocate a virtual channel for. |
2512 | * @port: port to allocate a virtual channel for. |
2486 | * @pbn: payload bandwidth number to request |
2513 | * @pbn: payload bandwidth number to request |
2487 | * @slots: returned number of slots for this PBN. |
2514 | * @slots: returned number of slots for this PBN. |
2488 | */ |
2515 | */ |
2489 | bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int *slots) |
2516 | bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int *slots) |
2490 | { |
2517 | { |
2491 | int ret; |
2518 | int ret; |
2492 | 2519 | ||
2493 | port = drm_dp_get_validated_port_ref(mgr, port); |
2520 | port = drm_dp_get_validated_port_ref(mgr, port); |
2494 | if (!port) |
2521 | if (!port) |
2495 | return false; |
2522 | return false; |
2496 | 2523 | ||
2497 | if (port->vcpi.vcpi > 0) { |
2524 | if (port->vcpi.vcpi > 0) { |
2498 | DRM_DEBUG_KMS("payload: vcpi %d already allocated for pbn %d - requested pbn %d\n", port->vcpi.vcpi, port->vcpi.pbn, pbn); |
2525 | DRM_DEBUG_KMS("payload: vcpi %d already allocated for pbn %d - requested pbn %d\n", port->vcpi.vcpi, port->vcpi.pbn, pbn); |
2499 | if (pbn == port->vcpi.pbn) { |
2526 | if (pbn == port->vcpi.pbn) { |
2500 | *slots = port->vcpi.num_slots; |
2527 | *slots = port->vcpi.num_slots; |
2501 | drm_dp_put_port(port); |
2528 | drm_dp_put_port(port); |
2502 | return true; |
2529 | return true; |
2503 | } |
2530 | } |
2504 | } |
2531 | } |
2505 | 2532 | ||
2506 | ret = drm_dp_init_vcpi(mgr, &port->vcpi, pbn); |
2533 | ret = drm_dp_init_vcpi(mgr, &port->vcpi, pbn); |
2507 | if (ret) { |
2534 | if (ret) { |
2508 | DRM_DEBUG_KMS("failed to init vcpi %d %d %d\n", DIV_ROUND_UP(pbn, mgr->pbn_div), mgr->avail_slots, ret); |
2535 | DRM_DEBUG_KMS("failed to init vcpi %d %d %d\n", DIV_ROUND_UP(pbn, mgr->pbn_div), mgr->avail_slots, ret); |
2509 | goto out; |
2536 | goto out; |
2510 | } |
2537 | } |
2511 | DRM_DEBUG_KMS("initing vcpi for %d %d\n", pbn, port->vcpi.num_slots); |
2538 | DRM_DEBUG_KMS("initing vcpi for %d %d\n", pbn, port->vcpi.num_slots); |
2512 | *slots = port->vcpi.num_slots; |
2539 | *slots = port->vcpi.num_slots; |
2513 | 2540 | ||
2514 | drm_dp_put_port(port); |
2541 | drm_dp_put_port(port); |
2515 | return true; |
2542 | return true; |
2516 | out: |
2543 | out: |
2517 | return false; |
2544 | return false; |
2518 | } |
2545 | } |
2519 | EXPORT_SYMBOL(drm_dp_mst_allocate_vcpi); |
2546 | EXPORT_SYMBOL(drm_dp_mst_allocate_vcpi); |
2520 | 2547 | ||
2521 | int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
2548 | int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
2522 | { |
2549 | { |
2523 | int slots = 0; |
2550 | int slots = 0; |
2524 | port = drm_dp_get_validated_port_ref(mgr, port); |
2551 | port = drm_dp_get_validated_port_ref(mgr, port); |
2525 | if (!port) |
2552 | if (!port) |
2526 | return slots; |
2553 | return slots; |
2527 | 2554 | ||
2528 | slots = port->vcpi.num_slots; |
2555 | slots = port->vcpi.num_slots; |
2529 | drm_dp_put_port(port); |
2556 | drm_dp_put_port(port); |
2530 | return slots; |
2557 | return slots; |
2531 | } |
2558 | } |
2532 | EXPORT_SYMBOL(drm_dp_mst_get_vcpi_slots); |
2559 | EXPORT_SYMBOL(drm_dp_mst_get_vcpi_slots); |
2533 | 2560 | ||
2534 | /** |
2561 | /** |
2535 | * drm_dp_mst_reset_vcpi_slots() - Reset number of slots to 0 for VCPI |
2562 | * drm_dp_mst_reset_vcpi_slots() - Reset number of slots to 0 for VCPI |
2536 | * @mgr: manager for this port |
2563 | * @mgr: manager for this port |
2537 | * @port: unverified pointer to a port. |
2564 | * @port: unverified pointer to a port. |
2538 | * |
2565 | * |
2539 | * This just resets the number of slots for the ports VCPI for later programming. |
2566 | * This just resets the number of slots for the ports VCPI for later programming. |
2540 | */ |
2567 | */ |
2541 | void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
2568 | void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
2542 | { |
2569 | { |
2543 | port = drm_dp_get_validated_port_ref(mgr, port); |
2570 | port = drm_dp_get_validated_port_ref(mgr, port); |
2544 | if (!port) |
2571 | if (!port) |
2545 | return; |
2572 | return; |
2546 | port->vcpi.num_slots = 0; |
2573 | port->vcpi.num_slots = 0; |
2547 | drm_dp_put_port(port); |
2574 | drm_dp_put_port(port); |
2548 | } |
2575 | } |
2549 | EXPORT_SYMBOL(drm_dp_mst_reset_vcpi_slots); |
2576 | EXPORT_SYMBOL(drm_dp_mst_reset_vcpi_slots); |
2550 | 2577 | ||
2551 | /** |
2578 | /** |
2552 | * drm_dp_mst_deallocate_vcpi() - deallocate a VCPI |
2579 | * drm_dp_mst_deallocate_vcpi() - deallocate a VCPI |
2553 | * @mgr: manager for this port |
2580 | * @mgr: manager for this port |
2554 | * @port: unverified port to deallocate vcpi for |
2581 | * @port: unverified port to deallocate vcpi for |
2555 | */ |
2582 | */ |
2556 | void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
2583 | void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) |
2557 | { |
2584 | { |
2558 | port = drm_dp_get_validated_port_ref(mgr, port); |
2585 | port = drm_dp_get_validated_port_ref(mgr, port); |
2559 | if (!port) |
2586 | if (!port) |
2560 | return; |
2587 | return; |
2561 | 2588 | ||
2562 | drm_dp_mst_put_payload_id(mgr, port->vcpi.vcpi); |
2589 | drm_dp_mst_put_payload_id(mgr, port->vcpi.vcpi); |
2563 | port->vcpi.num_slots = 0; |
2590 | port->vcpi.num_slots = 0; |
2564 | port->vcpi.pbn = 0; |
2591 | port->vcpi.pbn = 0; |
2565 | port->vcpi.aligned_pbn = 0; |
2592 | port->vcpi.aligned_pbn = 0; |
2566 | port->vcpi.vcpi = 0; |
2593 | port->vcpi.vcpi = 0; |
2567 | drm_dp_put_port(port); |
2594 | drm_dp_put_port(port); |
2568 | } |
2595 | } |
2569 | EXPORT_SYMBOL(drm_dp_mst_deallocate_vcpi); |
2596 | EXPORT_SYMBOL(drm_dp_mst_deallocate_vcpi); |
2570 | 2597 | ||
2571 | static int drm_dp_dpcd_write_payload(struct drm_dp_mst_topology_mgr *mgr, |
2598 | static int drm_dp_dpcd_write_payload(struct drm_dp_mst_topology_mgr *mgr, |
2572 | int id, struct drm_dp_payload *payload) |
2599 | int id, struct drm_dp_payload *payload) |
2573 | { |
2600 | { |
2574 | u8 payload_alloc[3], status; |
2601 | u8 payload_alloc[3], status; |
2575 | int ret; |
2602 | int ret; |
2576 | int retries = 0; |
2603 | int retries = 0; |
2577 | 2604 | ||
2578 | drm_dp_dpcd_writeb(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, |
2605 | drm_dp_dpcd_writeb(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, |
2579 | DP_PAYLOAD_TABLE_UPDATED); |
2606 | DP_PAYLOAD_TABLE_UPDATED); |
2580 | 2607 | ||
2581 | payload_alloc[0] = id; |
2608 | payload_alloc[0] = id; |
2582 | payload_alloc[1] = payload->start_slot; |
2609 | payload_alloc[1] = payload->start_slot; |
2583 | payload_alloc[2] = payload->num_slots; |
2610 | payload_alloc[2] = payload->num_slots; |
2584 | 2611 | ||
2585 | ret = drm_dp_dpcd_write(mgr->aux, DP_PAYLOAD_ALLOCATE_SET, payload_alloc, 3); |
2612 | ret = drm_dp_dpcd_write(mgr->aux, DP_PAYLOAD_ALLOCATE_SET, payload_alloc, 3); |
2586 | if (ret != 3) { |
2613 | if (ret != 3) { |
2587 | DRM_DEBUG_KMS("failed to write payload allocation %d\n", ret); |
2614 | DRM_DEBUG_KMS("failed to write payload allocation %d\n", ret); |
2588 | goto fail; |
2615 | goto fail; |
2589 | } |
2616 | } |
2590 | 2617 | ||
2591 | retry: |
2618 | retry: |
2592 | ret = drm_dp_dpcd_readb(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, &status); |
2619 | ret = drm_dp_dpcd_readb(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, &status); |
2593 | if (ret < 0) { |
2620 | if (ret < 0) { |
2594 | DRM_DEBUG_KMS("failed to read payload table status %d\n", ret); |
2621 | DRM_DEBUG_KMS("failed to read payload table status %d\n", ret); |
2595 | goto fail; |
2622 | goto fail; |
2596 | } |
2623 | } |
2597 | 2624 | ||
2598 | if (!(status & DP_PAYLOAD_TABLE_UPDATED)) { |
2625 | if (!(status & DP_PAYLOAD_TABLE_UPDATED)) { |
2599 | retries++; |
2626 | retries++; |
2600 | if (retries < 20) { |
2627 | if (retries < 20) { |
2601 | usleep_range(10000, 20000); |
2628 | usleep_range(10000, 20000); |
2602 | goto retry; |
2629 | goto retry; |
2603 | } |
2630 | } |
2604 | DRM_DEBUG_KMS("status not set after read payload table status %d\n", status); |
2631 | DRM_DEBUG_KMS("status not set after read payload table status %d\n", status); |
2605 | ret = -EINVAL; |
2632 | ret = -EINVAL; |
2606 | goto fail; |
2633 | goto fail; |
2607 | } |
2634 | } |
2608 | ret = 0; |
2635 | ret = 0; |
2609 | fail: |
2636 | fail: |
2610 | return ret; |
2637 | return ret; |
2611 | } |
2638 | } |
2612 | 2639 | ||
2613 | 2640 | ||
2614 | /** |
2641 | /** |
2615 | * drm_dp_check_act_status() - Check ACT handled status. |
2642 | * drm_dp_check_act_status() - Check ACT handled status. |
2616 | * @mgr: manager to use |
2643 | * @mgr: manager to use |
2617 | * |
2644 | * |
2618 | * Check the payload status bits in the DPCD for ACT handled completion. |
2645 | * Check the payload status bits in the DPCD for ACT handled completion. |
2619 | */ |
2646 | */ |
2620 | int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr) |
2647 | int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr) |
2621 | { |
2648 | { |
2622 | u8 status; |
2649 | u8 status; |
2623 | int ret; |
2650 | int ret; |
2624 | int count = 0; |
2651 | int count = 0; |
2625 | 2652 | ||
2626 | do { |
2653 | do { |
2627 | ret = drm_dp_dpcd_readb(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, &status); |
2654 | ret = drm_dp_dpcd_readb(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, &status); |
2628 | 2655 | ||
2629 | if (ret < 0) { |
2656 | if (ret < 0) { |
2630 | DRM_DEBUG_KMS("failed to read payload table status %d\n", ret); |
2657 | DRM_DEBUG_KMS("failed to read payload table status %d\n", ret); |
2631 | goto fail; |
2658 | goto fail; |
2632 | } |
2659 | } |
2633 | 2660 | ||
2634 | if (status & DP_PAYLOAD_ACT_HANDLED) |
2661 | if (status & DP_PAYLOAD_ACT_HANDLED) |
2635 | break; |
2662 | break; |
2636 | count++; |
2663 | count++; |
2637 | udelay(100); |
2664 | udelay(100); |
2638 | 2665 | ||
2639 | } while (count < 30); |
2666 | } while (count < 30); |
2640 | 2667 | ||
2641 | if (!(status & DP_PAYLOAD_ACT_HANDLED)) { |
2668 | if (!(status & DP_PAYLOAD_ACT_HANDLED)) { |
2642 | DRM_DEBUG_KMS("failed to get ACT bit %d after %d retries\n", status, count); |
2669 | DRM_DEBUG_KMS("failed to get ACT bit %d after %d retries\n", status, count); |
2643 | ret = -EINVAL; |
2670 | ret = -EINVAL; |
2644 | goto fail; |
2671 | goto fail; |
2645 | } |
2672 | } |
2646 | return 0; |
2673 | return 0; |
2647 | fail: |
2674 | fail: |
2648 | return ret; |
2675 | return ret; |
2649 | } |
2676 | } |
2650 | EXPORT_SYMBOL(drm_dp_check_act_status); |
2677 | EXPORT_SYMBOL(drm_dp_check_act_status); |
2651 | 2678 | ||
2652 | /** |
2679 | /** |
2653 | * drm_dp_calc_pbn_mode() - Calculate the PBN for a mode. |
2680 | * drm_dp_calc_pbn_mode() - Calculate the PBN for a mode. |
2654 | * @clock: dot clock for the mode |
2681 | * @clock: dot clock for the mode |
2655 | * @bpp: bpp for the mode. |
2682 | * @bpp: bpp for the mode. |
2656 | * |
2683 | * |
2657 | * This uses the formula in the spec to calculate the PBN value for a mode. |
2684 | * This uses the formula in the spec to calculate the PBN value for a mode. |
2658 | */ |
2685 | */ |
2659 | int drm_dp_calc_pbn_mode(int clock, int bpp) |
2686 | int drm_dp_calc_pbn_mode(int clock, int bpp) |
2660 | { |
2687 | { |
2661 | u64 kbps; |
2688 | u64 kbps; |
2662 | s64 peak_kbps; |
2689 | s64 peak_kbps; |
2663 | u32 numerator; |
2690 | u32 numerator; |
2664 | u32 denominator; |
2691 | u32 denominator; |
2665 | 2692 | ||
2666 | kbps = clock * bpp; |
2693 | kbps = clock * bpp; |
2667 | 2694 | ||
2668 | /* |
2695 | /* |
2669 | * margin 5300ppm + 300ppm ~ 0.6% as per spec, factor is 1.006 |
2696 | * margin 5300ppm + 300ppm ~ 0.6% as per spec, factor is 1.006 |
2670 | * The unit of 54/64Mbytes/sec is an arbitrary unit chosen based on |
2697 | * The unit of 54/64Mbytes/sec is an arbitrary unit chosen based on |
2671 | * common multiplier to render an integer PBN for all link rate/lane |
2698 | * common multiplier to render an integer PBN for all link rate/lane |
2672 | * counts combinations |
2699 | * counts combinations |
2673 | * calculate |
2700 | * calculate |
2674 | * peak_kbps *= (1006/1000) |
2701 | * peak_kbps *= (1006/1000) |
2675 | * peak_kbps *= (64/54) |
2702 | * peak_kbps *= (64/54) |
2676 | * peak_kbps *= 8 convert to bytes |
2703 | * peak_kbps *= 8 convert to bytes |
2677 | */ |
2704 | */ |
2678 | 2705 | ||
2679 | numerator = 64 * 1006; |
2706 | numerator = 64 * 1006; |
2680 | denominator = 54 * 8 * 1000 * 1000; |
2707 | denominator = 54 * 8 * 1000 * 1000; |
2681 | 2708 | ||
2682 | kbps *= numerator; |
2709 | kbps *= numerator; |
2683 | peak_kbps = drm_fixp_from_fraction(kbps, denominator); |
2710 | peak_kbps = drm_fixp_from_fraction(kbps, denominator); |
2684 | 2711 | ||
2685 | return drm_fixp2int_ceil(peak_kbps); |
2712 | return drm_fixp2int_ceil(peak_kbps); |
2686 | } |
2713 | } |
2687 | EXPORT_SYMBOL(drm_dp_calc_pbn_mode); |
2714 | EXPORT_SYMBOL(drm_dp_calc_pbn_mode); |
2688 | 2715 | ||
2689 | static int test_calc_pbn_mode(void) |
2716 | static int test_calc_pbn_mode(void) |
2690 | { |
2717 | { |
2691 | int ret; |
2718 | int ret; |
2692 | ret = drm_dp_calc_pbn_mode(154000, 30); |
2719 | ret = drm_dp_calc_pbn_mode(154000, 30); |
2693 | if (ret != 689) { |
2720 | if (ret != 689) { |
2694 | DRM_ERROR("PBN calculation test failed - clock %d, bpp %d, expected PBN %d, actual PBN %d.\n", |
2721 | DRM_ERROR("PBN calculation test failed - clock %d, bpp %d, expected PBN %d, actual PBN %d.\n", |
2695 | 154000, 30, 689, ret); |
2722 | 154000, 30, 689, ret); |
2696 | return -EINVAL; |
2723 | return -EINVAL; |
2697 | } |
2724 | } |
2698 | ret = drm_dp_calc_pbn_mode(234000, 30); |
2725 | ret = drm_dp_calc_pbn_mode(234000, 30); |
2699 | if (ret != 1047) { |
2726 | if (ret != 1047) { |
2700 | DRM_ERROR("PBN calculation test failed - clock %d, bpp %d, expected PBN %d, actual PBN %d.\n", |
2727 | DRM_ERROR("PBN calculation test failed - clock %d, bpp %d, expected PBN %d, actual PBN %d.\n", |
2701 | 234000, 30, 1047, ret); |
2728 | 234000, 30, 1047, ret); |
2702 | return -EINVAL; |
2729 | return -EINVAL; |
2703 | } |
2730 | } |
2704 | ret = drm_dp_calc_pbn_mode(297000, 24); |
2731 | ret = drm_dp_calc_pbn_mode(297000, 24); |
2705 | if (ret != 1063) { |
2732 | if (ret != 1063) { |
2706 | DRM_ERROR("PBN calculation test failed - clock %d, bpp %d, expected PBN %d, actual PBN %d.\n", |
2733 | DRM_ERROR("PBN calculation test failed - clock %d, bpp %d, expected PBN %d, actual PBN %d.\n", |
2707 | 297000, 24, 1063, ret); |
2734 | 297000, 24, 1063, ret); |
2708 | return -EINVAL; |
2735 | return -EINVAL; |
2709 | } |
2736 | } |
2710 | return 0; |
2737 | return 0; |
2711 | } |
2738 | } |
2712 | 2739 | ||
2713 | /* we want to kick the TX after we've ack the up/down IRQs. */ |
2740 | /* we want to kick the TX after we've ack the up/down IRQs. */ |
2714 | static void drm_dp_mst_kick_tx(struct drm_dp_mst_topology_mgr *mgr) |
2741 | static void drm_dp_mst_kick_tx(struct drm_dp_mst_topology_mgr *mgr) |
2715 | { |
2742 | { |
2716 | // queue_work(system_long_wq, &mgr->tx_work); |
2743 | // queue_work(system_long_wq, &mgr->tx_work); |
2717 | } |
2744 | } |
2718 | 2745 | ||
2719 | static void drm_dp_mst_dump_mstb(struct seq_file *m, |
2746 | static void drm_dp_mst_dump_mstb(struct seq_file *m, |
2720 | struct drm_dp_mst_branch *mstb) |
2747 | struct drm_dp_mst_branch *mstb) |
2721 | { |
2748 | { |
2722 | struct drm_dp_mst_port *port; |
2749 | struct drm_dp_mst_port *port; |
2723 | int tabs = mstb->lct; |
2750 | int tabs = mstb->lct; |
2724 | char prefix[10]; |
2751 | char prefix[10]; |
2725 | int i; |
2752 | int i; |
2726 | 2753 | ||
2727 | for (i = 0; i < tabs; i++) |
2754 | for (i = 0; i < tabs; i++) |
2728 | prefix[i] = '\t'; |
2755 | prefix[i] = '\t'; |
2729 | prefix[i] = '\0'; |
2756 | prefix[i] = '\0'; |
2730 | 2757 | ||
2731 | // seq_printf(m, "%smst: %p, %d\n", prefix, mstb, mstb->num_ports); |
2758 | // seq_printf(m, "%smst: %p, %d\n", prefix, mstb, mstb->num_ports); |
2732 | // list_for_each_entry(port, &mstb->ports, next) { |
2759 | // list_for_each_entry(port, &mstb->ports, next) { |
2733 | // seq_printf(m, "%sport: %d: ddps: %d ldps: %d, %p, conn: %p\n", prefix, port->port_num, port->ddps, port->ldps, port, port->connector); |
2760 | // seq_printf(m, "%sport: %d: ddps: %d ldps: %d, %p, conn: %p\n", prefix, port->port_num, port->ddps, port->ldps, port, port->connector); |
2734 | // if (port->mstb) |
2761 | // if (port->mstb) |
2735 | // drm_dp_mst_dump_mstb(m, port->mstb); |
2762 | // drm_dp_mst_dump_mstb(m, port->mstb); |
2736 | // } |
2763 | // } |
2737 | } |
2764 | } |
2738 | 2765 | ||
2739 | static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr, |
2766 | static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr, |
2740 | char *buf) |
2767 | char *buf) |
2741 | { |
2768 | { |
2742 | int ret; |
2769 | int ret; |
2743 | int i; |
2770 | int i; |
2744 | for (i = 0; i < 4; i++) { |
2771 | for (i = 0; i < 4; i++) { |
2745 | ret = drm_dp_dpcd_read(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS + (i * 16), &buf[i * 16], 16); |
2772 | ret = drm_dp_dpcd_read(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS + (i * 16), &buf[i * 16], 16); |
2746 | if (ret != 16) |
2773 | if (ret != 16) |
2747 | break; |
2774 | break; |
2748 | } |
2775 | } |
2749 | if (i == 4) |
2776 | if (i == 4) |
2750 | return true; |
2777 | return true; |
2751 | return false; |
2778 | return false; |
2752 | } |
2779 | } |
2753 | 2780 | ||
2754 | /** |
2781 | /** |
2755 | * drm_dp_mst_dump_topology(): dump topology to seq file. |
2782 | * drm_dp_mst_dump_topology(): dump topology to seq file. |
2756 | * @m: seq_file to dump output to |
2783 | * @m: seq_file to dump output to |
2757 | * @mgr: manager to dump current topology for. |
2784 | * @mgr: manager to dump current topology for. |
2758 | * |
2785 | * |
2759 | * helper to dump MST topology to a seq file for debugfs. |
2786 | * helper to dump MST topology to a seq file for debugfs. |
2760 | */ |
2787 | */ |
2761 | void drm_dp_mst_dump_topology(struct seq_file *m, |
2788 | void drm_dp_mst_dump_topology(struct seq_file *m, |
2762 | struct drm_dp_mst_topology_mgr *mgr) |
2789 | struct drm_dp_mst_topology_mgr *mgr) |
2763 | { |
2790 | { |
2764 | int i; |
2791 | int i; |
2765 | struct drm_dp_mst_port *port; |
2792 | struct drm_dp_mst_port *port; |
2766 | mutex_lock(&mgr->lock); |
2793 | mutex_lock(&mgr->lock); |
2767 | if (mgr->mst_primary) |
2794 | if (mgr->mst_primary) |
2768 | drm_dp_mst_dump_mstb(m, mgr->mst_primary); |
2795 | drm_dp_mst_dump_mstb(m, mgr->mst_primary); |
2769 | 2796 | ||
2770 | /* dump VCPIs */ |
2797 | /* dump VCPIs */ |
2771 | mutex_unlock(&mgr->lock); |
2798 | mutex_unlock(&mgr->lock); |
2772 | 2799 | ||
2773 | 2800 | ||
2774 | 2801 | ||
2775 | } |
2802 | } |
2776 | EXPORT_SYMBOL(drm_dp_mst_dump_topology); |
2803 | EXPORT_SYMBOL(drm_dp_mst_dump_topology); |
2777 | 2804 | ||
2778 | static void drm_dp_tx_work(struct work_struct *work) |
2805 | static void drm_dp_tx_work(struct work_struct *work) |
2779 | { |
2806 | { |
2780 | struct drm_dp_mst_topology_mgr *mgr = container_of(work, struct drm_dp_mst_topology_mgr, tx_work); |
2807 | struct drm_dp_mst_topology_mgr *mgr = container_of(work, struct drm_dp_mst_topology_mgr, tx_work); |
2781 | 2808 | ||
2782 | mutex_lock(&mgr->qlock); |
2809 | mutex_lock(&mgr->qlock); |
2783 | if (mgr->tx_down_in_progress) |
2810 | if (mgr->tx_down_in_progress) |
2784 | process_single_down_tx_qlock(mgr); |
2811 | process_single_down_tx_qlock(mgr); |
2785 | mutex_unlock(&mgr->qlock); |
2812 | mutex_unlock(&mgr->qlock); |
2786 | } |
2813 | } |
2787 | 2814 | ||
2788 | static void drm_dp_free_mst_port(struct kref *kref) |
2815 | static void drm_dp_free_mst_port(struct kref *kref) |
2789 | { |
2816 | { |
2790 | struct drm_dp_mst_port *port = container_of(kref, struct drm_dp_mst_port, kref); |
2817 | struct drm_dp_mst_port *port = container_of(kref, struct drm_dp_mst_port, kref); |
2791 | kref_put(&port->parent->kref, drm_dp_free_mst_branch_device); |
2818 | kref_put(&port->parent->kref, drm_dp_free_mst_branch_device); |
2792 | kfree(port); |
2819 | kfree(port); |
2793 | } |
2820 | } |
2794 | /** |
2821 | /** |
2795 | * drm_dp_mst_topology_mgr_init - initialise a topology manager |
2822 | * drm_dp_mst_topology_mgr_init - initialise a topology manager |
2796 | * @mgr: manager struct to initialise |
2823 | * @mgr: manager struct to initialise |
2797 | * @dev: device providing this structure - for i2c addition. |
2824 | * @dev: device providing this structure - for i2c addition. |
2798 | * @aux: DP helper aux channel to talk to this device |
2825 | * @aux: DP helper aux channel to talk to this device |
2799 | * @max_dpcd_transaction_bytes: hw specific DPCD transaction limit |
2826 | * @max_dpcd_transaction_bytes: hw specific DPCD transaction limit |
2800 | * @max_payloads: maximum number of payloads this GPU can source |
2827 | * @max_payloads: maximum number of payloads this GPU can source |
2801 | * @conn_base_id: the connector object ID the MST device is connected to. |
2828 | * @conn_base_id: the connector object ID the MST device is connected to. |
2802 | * |
2829 | * |
2803 | * Return 0 for success, or negative error code on failure |
2830 | * Return 0 for success, or negative error code on failure |
2804 | */ |
2831 | */ |
2805 | int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, |
2832 | int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, |
2806 | struct device *dev, struct drm_dp_aux *aux, |
2833 | struct device *dev, struct drm_dp_aux *aux, |
2807 | int max_dpcd_transaction_bytes, |
2834 | int max_dpcd_transaction_bytes, |
2808 | int max_payloads, int conn_base_id) |
2835 | int max_payloads, int conn_base_id) |
2809 | { |
2836 | { |
2810 | mutex_init(&mgr->lock); |
2837 | mutex_init(&mgr->lock); |
2811 | mutex_init(&mgr->qlock); |
2838 | mutex_init(&mgr->qlock); |
2812 | mutex_init(&mgr->payload_lock); |
2839 | mutex_init(&mgr->payload_lock); |
2813 | mutex_init(&mgr->destroy_connector_lock); |
2840 | mutex_init(&mgr->destroy_connector_lock); |
2814 | INIT_LIST_HEAD(&mgr->tx_msg_downq); |
2841 | INIT_LIST_HEAD(&mgr->tx_msg_downq); |
2815 | INIT_LIST_HEAD(&mgr->destroy_connector_list); |
2842 | INIT_LIST_HEAD(&mgr->destroy_connector_list); |
2816 | INIT_WORK(&mgr->work, drm_dp_mst_link_probe_work); |
2843 | INIT_WORK(&mgr->work, drm_dp_mst_link_probe_work); |
2817 | INIT_WORK(&mgr->tx_work, drm_dp_tx_work); |
2844 | INIT_WORK(&mgr->tx_work, drm_dp_tx_work); |
2818 | init_waitqueue_head(&mgr->tx_waitq); |
2845 | init_waitqueue_head(&mgr->tx_waitq); |
2819 | mgr->dev = dev; |
2846 | mgr->dev = dev; |
2820 | mgr->aux = aux; |
2847 | mgr->aux = aux; |
2821 | mgr->max_dpcd_transaction_bytes = max_dpcd_transaction_bytes; |
2848 | mgr->max_dpcd_transaction_bytes = max_dpcd_transaction_bytes; |
2822 | mgr->max_payloads = max_payloads; |
2849 | mgr->max_payloads = max_payloads; |
2823 | mgr->conn_base_id = conn_base_id; |
2850 | mgr->conn_base_id = conn_base_id; |
- | 2851 | if (max_payloads + 1 > sizeof(mgr->payload_mask) * 8 || |
|
- | 2852 | max_payloads + 1 > sizeof(mgr->vcpi_mask) * 8) |
|
- | 2853 | return -EINVAL; |
|
2824 | mgr->payloads = kcalloc(max_payloads, sizeof(struct drm_dp_payload), GFP_KERNEL); |
2854 | mgr->payloads = kcalloc(max_payloads, sizeof(struct drm_dp_payload), GFP_KERNEL); |
2825 | if (!mgr->payloads) |
2855 | if (!mgr->payloads) |
2826 | return -ENOMEM; |
2856 | return -ENOMEM; |
2827 | mgr->proposed_vcpis = kcalloc(max_payloads, sizeof(struct drm_dp_vcpi *), GFP_KERNEL); |
2857 | mgr->proposed_vcpis = kcalloc(max_payloads, sizeof(struct drm_dp_vcpi *), GFP_KERNEL); |
2828 | if (!mgr->proposed_vcpis) |
2858 | if (!mgr->proposed_vcpis) |
2829 | return -ENOMEM; |
2859 | return -ENOMEM; |
2830 | set_bit(0, &mgr->payload_mask); |
2860 | set_bit(0, &mgr->payload_mask); |
2831 | test_calc_pbn_mode(); |
2861 | if (test_calc_pbn_mode() < 0) |
- | 2862 | DRM_ERROR("MST PBN self-test failed\n"); |
|
- | 2863 | ||
2832 | return 0; |
2864 | return 0; |
2833 | } |
2865 | } |
2834 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_init); |
2866 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_init); |
2835 | 2867 | ||
2836 | /** |
2868 | /** |
2837 | * drm_dp_mst_topology_mgr_destroy() - destroy topology manager. |
2869 | * drm_dp_mst_topology_mgr_destroy() - destroy topology manager. |
2838 | * @mgr: manager to destroy |
2870 | * @mgr: manager to destroy |
2839 | */ |
2871 | */ |
2840 | void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr) |
2872 | void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr) |
2841 | { |
2873 | { |
2842 | mutex_lock(&mgr->payload_lock); |
2874 | mutex_lock(&mgr->payload_lock); |
2843 | kfree(mgr->payloads); |
2875 | kfree(mgr->payloads); |
2844 | mgr->payloads = NULL; |
2876 | mgr->payloads = NULL; |
2845 | kfree(mgr->proposed_vcpis); |
2877 | kfree(mgr->proposed_vcpis); |
2846 | mgr->proposed_vcpis = NULL; |
2878 | mgr->proposed_vcpis = NULL; |
2847 | mutex_unlock(&mgr->payload_lock); |
2879 | mutex_unlock(&mgr->payload_lock); |
2848 | mgr->dev = NULL; |
2880 | mgr->dev = NULL; |
2849 | mgr->aux = NULL; |
2881 | mgr->aux = NULL; |
2850 | } |
2882 | } |
2851 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_destroy); |
2883 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_destroy); |
2852 | 2884 | ||
2853 | /* I2C device */ |
2885 | /* I2C device */ |
2854 | static int drm_dp_mst_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, |
2886 | static int drm_dp_mst_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, |
2855 | int num) |
2887 | int num) |
2856 | { |
2888 | { |
2857 | struct drm_dp_aux *aux = adapter->algo_data; |
2889 | struct drm_dp_aux *aux = adapter->algo_data; |
2858 | struct drm_dp_mst_port *port = container_of(aux, struct drm_dp_mst_port, aux); |
2890 | struct drm_dp_mst_port *port = container_of(aux, struct drm_dp_mst_port, aux); |
2859 | struct drm_dp_mst_branch *mstb; |
2891 | struct drm_dp_mst_branch *mstb; |
2860 | struct drm_dp_mst_topology_mgr *mgr = port->mgr; |
2892 | struct drm_dp_mst_topology_mgr *mgr = port->mgr; |
2861 | unsigned int i; |
2893 | unsigned int i; |
2862 | bool reading = false; |
2894 | bool reading = false; |
2863 | struct drm_dp_sideband_msg_req_body msg; |
2895 | struct drm_dp_sideband_msg_req_body msg; |
2864 | struct drm_dp_sideband_msg_tx *txmsg = NULL; |
2896 | struct drm_dp_sideband_msg_tx *txmsg = NULL; |
2865 | int ret; |
2897 | int ret; |
2866 | 2898 | ||
2867 | mstb = drm_dp_get_validated_mstb_ref(mgr, port->parent); |
2899 | mstb = drm_dp_get_validated_mstb_ref(mgr, port->parent); |
2868 | if (!mstb) |
2900 | if (!mstb) |
2869 | return -EREMOTEIO; |
2901 | return -EREMOTEIO; |
2870 | 2902 | ||
2871 | /* construct i2c msg */ |
2903 | /* construct i2c msg */ |
2872 | /* see if last msg is a read */ |
2904 | /* see if last msg is a read */ |
2873 | if (msgs[num - 1].flags & I2C_M_RD) |
2905 | if (msgs[num - 1].flags & I2C_M_RD) |
2874 | reading = true; |
2906 | reading = true; |
2875 | 2907 | ||
2876 | if (!reading || (num - 1 > DP_REMOTE_I2C_READ_MAX_TRANSACTIONS)) { |
2908 | if (!reading || (num - 1 > DP_REMOTE_I2C_READ_MAX_TRANSACTIONS)) { |
2877 | DRM_DEBUG_KMS("Unsupported I2C transaction for MST device\n"); |
2909 | DRM_DEBUG_KMS("Unsupported I2C transaction for MST device\n"); |
2878 | ret = -EIO; |
2910 | ret = -EIO; |
2879 | goto out; |
2911 | goto out; |
2880 | } |
2912 | } |
2881 | 2913 | ||
2882 | memset(&msg, 0, sizeof(msg)); |
2914 | memset(&msg, 0, sizeof(msg)); |
2883 | msg.req_type = DP_REMOTE_I2C_READ; |
2915 | msg.req_type = DP_REMOTE_I2C_READ; |
2884 | msg.u.i2c_read.num_transactions = num - 1; |
2916 | msg.u.i2c_read.num_transactions = num - 1; |
2885 | msg.u.i2c_read.port_number = port->port_num; |
2917 | msg.u.i2c_read.port_number = port->port_num; |
2886 | for (i = 0; i < num - 1; i++) { |
2918 | for (i = 0; i < num - 1; i++) { |
2887 | msg.u.i2c_read.transactions[i].i2c_dev_id = msgs[i].addr; |
2919 | msg.u.i2c_read.transactions[i].i2c_dev_id = msgs[i].addr; |
2888 | msg.u.i2c_read.transactions[i].num_bytes = msgs[i].len; |
2920 | msg.u.i2c_read.transactions[i].num_bytes = msgs[i].len; |
2889 | msg.u.i2c_read.transactions[i].bytes = msgs[i].buf; |
2921 | msg.u.i2c_read.transactions[i].bytes = msgs[i].buf; |
2890 | } |
2922 | } |
2891 | msg.u.i2c_read.read_i2c_device_id = msgs[num - 1].addr; |
2923 | msg.u.i2c_read.read_i2c_device_id = msgs[num - 1].addr; |
2892 | msg.u.i2c_read.num_bytes_read = msgs[num - 1].len; |
2924 | msg.u.i2c_read.num_bytes_read = msgs[num - 1].len; |
2893 | 2925 | ||
2894 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
2926 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL); |
2895 | if (!txmsg) { |
2927 | if (!txmsg) { |
2896 | ret = -ENOMEM; |
2928 | ret = -ENOMEM; |
2897 | goto out; |
2929 | goto out; |
2898 | } |
2930 | } |
2899 | 2931 | ||
2900 | txmsg->dst = mstb; |
2932 | txmsg->dst = mstb; |
2901 | drm_dp_encode_sideband_req(&msg, txmsg); |
2933 | drm_dp_encode_sideband_req(&msg, txmsg); |
2902 | 2934 | ||
2903 | drm_dp_queue_down_tx(mgr, txmsg); |
2935 | drm_dp_queue_down_tx(mgr, txmsg); |
2904 | 2936 | ||
2905 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); |
2937 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); |
2906 | if (ret > 0) { |
2938 | if (ret > 0) { |
2907 | 2939 | ||
2908 | if (txmsg->reply.reply_type == 1) { /* got a NAK back */ |
2940 | if (txmsg->reply.reply_type == 1) { /* got a NAK back */ |
2909 | ret = -EREMOTEIO; |
2941 | ret = -EREMOTEIO; |
2910 | goto out; |
2942 | goto out; |
2911 | } |
2943 | } |
2912 | if (txmsg->reply.u.remote_i2c_read_ack.num_bytes != msgs[num - 1].len) { |
2944 | if (txmsg->reply.u.remote_i2c_read_ack.num_bytes != msgs[num - 1].len) { |
2913 | ret = -EIO; |
2945 | ret = -EIO; |
2914 | goto out; |
2946 | goto out; |
2915 | } |
2947 | } |
2916 | memcpy(msgs[num - 1].buf, txmsg->reply.u.remote_i2c_read_ack.bytes, msgs[num - 1].len); |
2948 | memcpy(msgs[num - 1].buf, txmsg->reply.u.remote_i2c_read_ack.bytes, msgs[num - 1].len); |
2917 | ret = num; |
2949 | ret = num; |
2918 | } |
2950 | } |
2919 | out: |
2951 | out: |
2920 | kfree(txmsg); |
2952 | kfree(txmsg); |
2921 | drm_dp_put_mst_branch_device(mstb); |
2953 | drm_dp_put_mst_branch_device(mstb); |
2922 | return ret; |
2954 | return ret; |
2923 | } |
2955 | } |
2924 | 2956 | ||
2925 | static u32 drm_dp_mst_i2c_functionality(struct i2c_adapter *adapter) |
2957 | static u32 drm_dp_mst_i2c_functionality(struct i2c_adapter *adapter) |
2926 | { |
2958 | { |
2927 | return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | |
2959 | return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | |
2928 | I2C_FUNC_SMBUS_READ_BLOCK_DATA | |
2960 | I2C_FUNC_SMBUS_READ_BLOCK_DATA | |
2929 | I2C_FUNC_SMBUS_BLOCK_PROC_CALL | |
2961 | I2C_FUNC_SMBUS_BLOCK_PROC_CALL | |
2930 | I2C_FUNC_10BIT_ADDR; |
2962 | I2C_FUNC_10BIT_ADDR; |
2931 | } |
2963 | } |
2932 | 2964 | ||
2933 | static const struct i2c_algorithm drm_dp_mst_i2c_algo = { |
2965 | static const struct i2c_algorithm drm_dp_mst_i2c_algo = { |
2934 | .functionality = drm_dp_mst_i2c_functionality, |
2966 | .functionality = drm_dp_mst_i2c_functionality, |
2935 | .master_xfer = drm_dp_mst_i2c_xfer, |
2967 | .master_xfer = drm_dp_mst_i2c_xfer, |
2936 | }; |
2968 | }; |
2937 | 2969 | ||
2938 | /** |
2970 | /** |
2939 | * drm_dp_mst_register_i2c_bus() - register an I2C adapter for I2C-over-AUX |
2971 | * drm_dp_mst_register_i2c_bus() - register an I2C adapter for I2C-over-AUX |
2940 | * @aux: DisplayPort AUX channel |
2972 | * @aux: DisplayPort AUX channel |
2941 | * |
2973 | * |
2942 | * Returns 0 on success or a negative error code on failure. |
2974 | * Returns 0 on success or a negative error code on failure. |
2943 | */ |
2975 | */ |
2944 | static int drm_dp_mst_register_i2c_bus(struct drm_dp_aux *aux) |
2976 | static int drm_dp_mst_register_i2c_bus(struct drm_dp_aux *aux) |
2945 | { |
2977 | { |
2946 | aux->ddc.algo = &drm_dp_mst_i2c_algo; |
2978 | aux->ddc.algo = &drm_dp_mst_i2c_algo; |
2947 | aux->ddc.algo_data = aux; |
2979 | aux->ddc.algo_data = aux; |
2948 | aux->ddc.retries = 3; |
2980 | aux->ddc.retries = 3; |
2949 | 2981 | ||
2950 | aux->ddc.class = I2C_CLASS_DDC; |
2982 | aux->ddc.class = I2C_CLASS_DDC; |
2951 | aux->ddc.owner = THIS_MODULE; |
2983 | aux->ddc.owner = THIS_MODULE; |
2952 | aux->ddc.dev.parent = aux->dev; |
2984 | aux->ddc.dev.parent = aux->dev; |
2953 | 2985 | ||
2954 | return i2c_add_adapter(&aux->ddc); |
2986 | return i2c_add_adapter(&aux->ddc); |
2955 | } |
2987 | } |
2956 | 2988 | ||
2957 | /** |
2989 | /** |
2958 | * drm_dp_mst_unregister_i2c_bus() - unregister an I2C-over-AUX adapter |
2990 | * drm_dp_mst_unregister_i2c_bus() - unregister an I2C-over-AUX adapter |
2959 | * @aux: DisplayPort AUX channel |
2991 | * @aux: DisplayPort AUX channel |
2960 | */ |
2992 | */ |
2961 | static void drm_dp_mst_unregister_i2c_bus(struct drm_dp_aux *aux) |
2993 | static void drm_dp_mst_unregister_i2c_bus(struct drm_dp_aux *aux) |
2962 | { |
2994 | { |
2963 | i2c_del_adapter(&aux->ddc); |
2995 | i2c_del_adapter(&aux->ddc); |
2964 | }>>>>>>>>>>>>>>>>>>>>>>><>>><>><>><>><>><>>><>><>><>>><>><>><>><>><>><>>><>><>>><>><>><>><>><>>><>=><=>=><=>=><=>=><=> |
2996 | }>>>>>>>>>>>>>>>>>>>>>>>>><>>><>><>><>><>><>>><>><>><>>><>><>><>><>><>><>>><>><>>><>><>><>><>><>>><>=><=>=><=>=><=>=><=> |