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