WebSVN – Kolibri OS – Diff – /drivers/include/drm/drm_dp_mst_helper.h


/*
 * Copyright © 2014 Red Hat.
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */
#ifndef _DRM_DP_MST_HELPER_H_
#define _DRM_DP_MST_HELPER_H_
 
#include 
#include 
 
struct drm_dp_mst_branch;
 
/**
 * struct drm_dp_vcpi - Virtual Channel Payload Identifier
 * @vcpi: Virtual channel ID.
 * @pbn: Payload Bandwidth Number for this channel
 * @aligned_pbn: PBN aligned with slot size
 * @num_slots: number of slots for this PBN
 */
struct drm_dp_vcpi {
	int vcpi;
	int pbn;
	int aligned_pbn;
	int num_slots;
};
 
/**
 * struct drm_dp_mst_port - MST port
 * @kref: reference count for this port.
 * @guid_valid: for DP 1.2 devices if we have validated the GUID.
 * @guid: guid for DP 1.2 device on this port.
 * @port_num: port number
 * @input: if this port is an input port.
 * @mcs: message capability status - DP 1.2 spec.
 * @ddps: DisplayPort Device Plug Status - DP 1.2
 * @pdt: Peer Device Type
 * @ldps: Legacy Device Plug Status
 * @dpcd_rev: DPCD revision of device on this port
 * @num_sdp_streams: Number of simultaneous streams
 * @num_sdp_stream_sinks: Number of stream sinks
 * @available_pbn: Available bandwidth for this port.
 * @next: link to next port on this branch device
 * @mstb: branch device attach below this port
 * @aux: i2c aux transport to talk to device connected to this port.
 * @parent: branch device parent of this port
 * @vcpi: Virtual Channel Payload info for this port.
 * @connector: DRM connector this port is connected to.
 * @mgr: topology manager this port lives under.
 *
 * This structure represents an MST port endpoint on a device somewhere
 * in the MST topology.
 */
struct drm_dp_mst_port {
	struct kref kref;
 
	/* if dpcd 1.2 device is on this port - its GUID info */
	bool guid_valid;
	u8 guid[16];
 
	u8 port_num;
	bool input;
	bool mcs;
	bool ddps;
	u8 pdt;
	bool ldps;
	u8 dpcd_rev;
	u8 num_sdp_streams;
	u8 num_sdp_stream_sinks;
	uint16_t available_pbn;
	struct list_head next;
	struct drm_dp_mst_branch *mstb; /* pointer to an mstb if this port has one */
	struct drm_dp_aux aux; /* i2c bus for this port? */
	struct drm_dp_mst_branch *parent;
 
	struct drm_dp_vcpi vcpi;
	struct drm_connector *connector;
	struct drm_dp_mst_topology_mgr *mgr;
 
	struct edid *cached_edid; /* for DP logical ports - make tiling work */
};
 
/**
 * struct drm_dp_mst_branch - MST branch device.
 * @kref: reference count for this port.
 * @rad: Relative Address to talk to this branch device.
 * @lct: Link count total to talk to this branch device.
 * @num_ports: number of ports on the branch.
 * @msg_slots: one bit per transmitted msg slot.
 * @ports: linked list of ports on this branch.
 * @port_parent: pointer to the port parent, NULL if toplevel.
 * @mgr: topology manager for this branch device.
 * @tx_slots: transmission slots for this device.
 * @last_seqno: last sequence number used to talk to this.
 * @link_address_sent: if a link address message has been sent to this device yet.
 *
 * This structure represents an MST branch device, there is one
 * primary branch device at the root, along with any others connected
 * to downstream ports
 */
struct drm_dp_mst_branch {
	struct kref kref;
	u8 rad[8];
	u8 lct;
	int num_ports;
 
	int msg_slots;
	struct list_head ports;
 
	/* list of tx ops queue for this port */
	struct drm_dp_mst_port *port_parent;
	struct drm_dp_mst_topology_mgr *mgr;
 
	/* slots are protected by mstb->mgr->qlock */
	struct drm_dp_sideband_msg_tx *tx_slots[2];
	int last_seqno;
	bool link_address_sent;
};
 
 
/* sideband msg header - not bit struct */
struct drm_dp_sideband_msg_hdr {
	u8 lct;
	u8 lcr;
	u8 rad[8];
	bool broadcast;
	bool path_msg;
	u8 msg_len;
	bool somt;
	bool eomt;
	bool seqno;
};
 
struct drm_dp_nak_reply {
	u8 guid[16];
	u8 reason;
	u8 nak_data;
};
 
struct drm_dp_link_address_ack_reply {
	u8 guid[16];
	u8 nports;
	struct drm_dp_link_addr_reply_port {
		bool input_port;
		u8 peer_device_type;
		u8 port_number;
		bool mcs;
		bool ddps;
		bool legacy_device_plug_status;
		u8 dpcd_revision;
		u8 peer_guid[16];
		u8 num_sdp_streams;
		u8 num_sdp_stream_sinks;
	} ports[16];
};
 
struct drm_dp_remote_dpcd_read_ack_reply {
	u8 port_number;
	u8 num_bytes;
	u8 bytes[255];
};
 
struct drm_dp_remote_dpcd_write_ack_reply {
	u8 port_number;
};
 
struct drm_dp_remote_dpcd_write_nak_reply {
	u8 port_number;
	u8 reason;
	u8 bytes_written_before_failure;
};
 
struct drm_dp_remote_i2c_read_ack_reply {
	u8 port_number;
	u8 num_bytes;
	u8 bytes[255];
};
 
struct drm_dp_remote_i2c_read_nak_reply {
	u8 port_number;
	u8 nak_reason;
	u8 i2c_nak_transaction;
};
 
struct drm_dp_remote_i2c_write_ack_reply {
	u8 port_number;
};
 
 
struct drm_dp_sideband_msg_rx {
	u8 chunk[48];
	u8 msg[256];
	u8 curchunk_len;
	u8 curchunk_idx; /* chunk we are parsing now */
	u8 curchunk_hdrlen;
	u8 curlen; /* total length of the msg */
	bool have_somt;
	bool have_eomt;
	struct drm_dp_sideband_msg_hdr initial_hdr;
};
 
 
struct drm_dp_allocate_payload {
	u8 port_number;
	u8 number_sdp_streams;
	u8 vcpi;
	u16 pbn;
	u8 sdp_stream_sink[8];
};
 
struct drm_dp_allocate_payload_ack_reply {
	u8 port_number;
	u8 vcpi;
	u16 allocated_pbn;
};
 
struct drm_dp_connection_status_notify {
	u8 guid[16];
	u8 port_number;
	bool legacy_device_plug_status;
	bool displayport_device_plug_status;
	bool message_capability_status;
	bool input_port;
	u8 peer_device_type;
};
 
struct drm_dp_remote_dpcd_read {
	u8 port_number;
	u32 dpcd_address;
	u8 num_bytes;
};
 
struct drm_dp_remote_dpcd_write {
	u8 port_number;
	u32 dpcd_address;
	u8 num_bytes;
	u8 *bytes;
};
 
struct drm_dp_remote_i2c_read {
	u8 num_transactions;
	u8 port_number;
	struct {
		u8 i2c_dev_id;
		u8 num_bytes;
		u8 *bytes;
		u8 no_stop_bit;
		u8 i2c_transaction_delay;
	} transactions[4];
	u8 read_i2c_device_id;
	u8 num_bytes_read;
};
 
struct drm_dp_remote_i2c_write {
	u8 port_number;
	u8 write_i2c_device_id;
	u8 num_bytes;
	u8 *bytes;
};
 
/* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */
struct drm_dp_port_number_req {
	u8 port_number;
};
 
struct drm_dp_enum_path_resources_ack_reply {
	u8 port_number;
	u16 full_payload_bw_number;
	u16 avail_payload_bw_number;
};
 
/* covers POWER_DOWN_PHY, POWER_UP_PHY */
struct drm_dp_port_number_rep {
	u8 port_number;
};
 
struct drm_dp_query_payload {
	u8 port_number;
	u8 vcpi;
};
 
struct drm_dp_resource_status_notify {
	u8 port_number;
	u8 guid[16];
	u16 available_pbn;
};
 
struct drm_dp_query_payload_ack_reply {
	u8 port_number;
	u8 allocated_pbn;
};
 
struct drm_dp_sideband_msg_req_body {
	u8 req_type;
	union ack_req {
		struct drm_dp_connection_status_notify conn_stat;
		struct drm_dp_port_number_req port_num;
		struct drm_dp_resource_status_notify resource_stat;
 
		struct drm_dp_query_payload query_payload;
		struct drm_dp_allocate_payload allocate_payload;
 
		struct drm_dp_remote_dpcd_read dpcd_read;
		struct drm_dp_remote_dpcd_write dpcd_write;
 
		struct drm_dp_remote_i2c_read i2c_read;
		struct drm_dp_remote_i2c_write i2c_write;
	} u;
};
 
struct drm_dp_sideband_msg_reply_body {
	u8 reply_type;
	u8 req_type;
	union ack_replies {
		struct drm_dp_nak_reply nak;
		struct drm_dp_link_address_ack_reply link_addr;
		struct drm_dp_port_number_rep port_number;
 
		struct drm_dp_enum_path_resources_ack_reply path_resources;
		struct drm_dp_allocate_payload_ack_reply allocate_payload;
		struct drm_dp_query_payload_ack_reply query_payload;
 
		struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack;
		struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack;
		struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack;
 
		struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack;
		struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack;
		struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack;
	} u;
};
 
/* msg is queued to be put into a slot */
#define DRM_DP_SIDEBAND_TX_QUEUED 0
/* msg has started transmitting on a slot - still on msgq */
#define DRM_DP_SIDEBAND_TX_START_SEND 1
/* msg has finished transmitting on a slot - removed from msgq only in slot */
#define DRM_DP_SIDEBAND_TX_SENT 2
/* msg has received a response - removed from slot */
#define DRM_DP_SIDEBAND_TX_RX 3
#define DRM_DP_SIDEBAND_TX_TIMEOUT 4
 
struct drm_dp_sideband_msg_tx {
	u8 msg[256];
	u8 chunk[48];
	u8 cur_offset;
	u8 cur_len;
	struct drm_dp_mst_branch *dst;
	struct list_head next;
	int seqno;
	int state;
	bool path_msg;
	struct drm_dp_sideband_msg_reply_body reply;
};
 
/* sideband msg handler */
struct drm_dp_mst_topology_mgr;
struct drm_dp_mst_topology_cbs {
	/* create a connector for a port */
	struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path);
	void (*destroy_connector)(struct drm_dp_mst_topology_mgr *mgr,
				  struct drm_connector *connector);
	void (*hotplug)(struct drm_dp_mst_topology_mgr *mgr);
 
};
 
#define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8)
 
#define DP_PAYLOAD_LOCAL 1
#define DP_PAYLOAD_REMOTE 2
#define DP_PAYLOAD_DELETE_LOCAL 3
 
struct drm_dp_payload {
	int payload_state;
	int start_slot;
	int num_slots;
	int vcpi;
};
 
/**
 * struct drm_dp_mst_topology_mgr - DisplayPort MST manager
 * @dev: device pointer for adding i2c devices etc.
 * @cbs: callbacks for connector addition and destruction.
 * @max_dpcd_transaction_bytes - maximum number of bytes to read/write in one go.
 * @aux: aux channel for the DP connector.
 * @max_payloads: maximum number of payloads the GPU can generate.
 * @conn_base_id: DRM connector ID this mgr is connected to.
 * @down_rep_recv: msg receiver state for down replies.
 * @up_req_recv: msg receiver state for up requests.
 * @lock: protects mst state, primary, guid, dpcd.
 * @mst_state: if this manager is enabled for an MST capable port.
 * @mst_primary: pointer to the primary branch device.
 * @guid_valid: GUID valid for the primary branch device.
 * @guid: GUID for primary port.
 * @dpcd: cache of DPCD for primary port.
 * @pbn_div: PBN to slots divisor.
 *
 * This struct represents the toplevel displayport MST topology manager.
 * There should be one instance of this for every MST capable DP connector
 * on the GPU.
 */
struct drm_dp_mst_topology_mgr {
 
	struct device *dev;
	struct drm_dp_mst_topology_cbs *cbs;
	int max_dpcd_transaction_bytes;
	struct drm_dp_aux *aux; /* auxch for this topology mgr to use */
	int max_payloads;
	int conn_base_id;
 
	/* only ever accessed from the workqueue - which should be serialised */
	struct drm_dp_sideband_msg_rx down_rep_recv;
	struct drm_dp_sideband_msg_rx up_req_recv;
 
	/* pointer to info about the initial MST device */
	struct mutex lock; /* protects mst_state + primary + guid + dpcd */
 
	bool mst_state;
	struct drm_dp_mst_branch *mst_primary;
	/* primary MST device GUID */
	bool guid_valid;
	u8 guid[16];
	u8 dpcd[DP_RECEIVER_CAP_SIZE];
	u8 sink_count;
	int pbn_div;
	int total_slots;
	int avail_slots;
	int total_pbn;
 
	/* messages to be transmitted */
	/* qlock protects the upq/downq and in_progress,
	   the mstb tx_slots and txmsg->state once they are queued */
    struct mutex qlock;
	struct list_head tx_msg_downq;
	struct list_head tx_msg_upq;
	bool tx_down_in_progress;
	bool tx_up_in_progress;
 
	/* payload info + lock for it */
	struct mutex payload_lock;
	struct drm_dp_vcpi **proposed_vcpis;
	struct drm_dp_payload *payloads;
	unsigned long payload_mask;
	unsigned long vcpi_mask;
 
	wait_queue_head_t tx_waitq;
	struct work_struct work;
 
	struct work_struct tx_work;
};
 
int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, struct device *dev, struct drm_dp_aux *aux, int max_dpcd_transaction_bytes, int max_payloads, int conn_base_id);
 
void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr);
 
 
int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state);
 
 
int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled);
 
 
enum drm_connector_status drm_dp_mst_detect_port(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
 
struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
 
 
int drm_dp_calc_pbn_mode(int clock, int bpp);
 
 
bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int *slots);
 
 
void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
 
 
void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr,
				struct drm_dp_mst_port *port);
 
 
int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr,
			   int pbn);
 
 
int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr);
 
 
int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr);
 
int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr);
 
void drm_dp_mst_dump_topology(struct seq_file *m,
			      struct drm_dp_mst_topology_mgr *mgr);
 
void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr);
int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr);
#endif

Rev 5056	Rev 5270
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	#ifndef _DRM_DP_MST_HELPER_H_	22	#ifndef _DRM_DP_MST_HELPER_H_
23	#define _DRM_DP_MST_HELPER_H_	23	#define _DRM_DP_MST_HELPER_H_
24		24
25	#include	25	#include
26	#include	26	#include
27		27
28	struct drm_dp_mst_branch;	28	struct drm_dp_mst_branch;
29		29
30	/**	30	/**
31	* struct drm_dp_vcpi - Virtual Channel Payload Identifer	31	* struct drm_dp_vcpi - Virtual Channel Payload Identifier
32	* @vcpi: Virtual channel ID.	32	* @vcpi: Virtual channel ID.
33	* @pbn: Payload Bandwidth Number for this channel	33	* @pbn: Payload Bandwidth Number for this channel
34	* @aligned_pbn: PBN aligned with slot size	34	* @aligned_pbn: PBN aligned with slot size
35	* @num_slots: number of slots for this PBN	35	* @num_slots: number of slots for this PBN
36	*/	36	*/
37	struct drm_dp_vcpi {	37	struct drm_dp_vcpi {
38	int vcpi;	38	int vcpi;
39	int pbn;	39	int pbn;
40	int aligned_pbn;	40	int aligned_pbn;
41	int num_slots;	41	int num_slots;
42	};	42	};
43		43
44	/**	44	/**
45	* struct drm_dp_mst_port - MST port	45	* struct drm_dp_mst_port - MST port
46	* @kref: reference count for this port.	46	* @kref: reference count for this port.
47	* @guid_valid: for DP 1.2 devices if we have validated the GUID.	47	* @guid_valid: for DP 1.2 devices if we have validated the GUID.
48	* @guid: guid for DP 1.2 device on this port.	48	* @guid: guid for DP 1.2 device on this port.
49	* @port_num: port number	49	* @port_num: port number
50	* @input: if this port is an input port.	50	* @input: if this port is an input port.
51	* @mcs: message capability status - DP 1.2 spec.	51	* @mcs: message capability status - DP 1.2 spec.
52	* @ddps: DisplayPort Device Plug Status - DP 1.2	52	* @ddps: DisplayPort Device Plug Status - DP 1.2
53	* @pdt: Peer Device Type	53	* @pdt: Peer Device Type
54	* @ldps: Legacy Device Plug Status	54	* @ldps: Legacy Device Plug Status
55	* @dpcd_rev: DPCD revision of device on this port	55	* @dpcd_rev: DPCD revision of device on this port
56	* @num_sdp_streams: Number of simultaneous streams	56	* @num_sdp_streams: Number of simultaneous streams
57	* @num_sdp_stream_sinks: Number of stream sinks	57	* @num_sdp_stream_sinks: Number of stream sinks
58	* @available_pbn: Available bandwidth for this port.	58	* @available_pbn: Available bandwidth for this port.
59	* @next: link to next port on this branch device	59	* @next: link to next port on this branch device
60	* @mstb: branch device attach below this port	60	* @mstb: branch device attach below this port
61	* @aux: i2c aux transport to talk to device connected to this port.	61	* @aux: i2c aux transport to talk to device connected to this port.
62	* @parent: branch device parent of this port	62	* @parent: branch device parent of this port
63	* @vcpi: Virtual Channel Payload info for this port.	63	* @vcpi: Virtual Channel Payload info for this port.
64	* @connector: DRM connector this port is connected to.	64	* @connector: DRM connector this port is connected to.
65	* @mgr: topology manager this port lives under.	65	* @mgr: topology manager this port lives under.
66	*	66	*
67	* This structure represents an MST port endpoint on a device somewhere	67	* This structure represents an MST port endpoint on a device somewhere
68	* in the MST topology.	68	* in the MST topology.
69	*/	69	*/
70	struct drm_dp_mst_port {	70	struct drm_dp_mst_port {
71	struct kref kref;	71	struct kref kref;
72		72
73	/* if dpcd 1.2 device is on this port - its GUID info */	73	/* if dpcd 1.2 device is on this port - its GUID info */
74	bool guid_valid;	74	bool guid_valid;
75	u8 guid[16];	75	u8 guid[16];
76		76
77	u8 port_num;	77	u8 port_num;
78	bool input;	78	bool input;
79	bool mcs;	79	bool mcs;
80	bool ddps;	80	bool ddps;
81	u8 pdt;	81	u8 pdt;
82	bool ldps;	82	bool ldps;
83	u8 dpcd_rev;	83	u8 dpcd_rev;
84	u8 num_sdp_streams;	84	u8 num_sdp_streams;
85	u8 num_sdp_stream_sinks;	85	u8 num_sdp_stream_sinks;
86	uint16_t available_pbn;	86	uint16_t available_pbn;
87	struct list_head next;	87	struct list_head next;
88	struct drm_dp_mst_branch mstb; / pointer to an mstb if this port has one */	88	struct drm_dp_mst_branch mstb; / pointer to an mstb if this port has one */
89	struct drm_dp_aux aux; /* i2c bus for this port? */	89	struct drm_dp_aux aux; /* i2c bus for this port? */
90	struct drm_dp_mst_branch *parent;	90	struct drm_dp_mst_branch *parent;
91		91
92	struct drm_dp_vcpi vcpi;	92	struct drm_dp_vcpi vcpi;
93	struct drm_connector *connector;	93	struct drm_connector *connector;
94	struct drm_dp_mst_topology_mgr *mgr;	94	struct drm_dp_mst_topology_mgr *mgr;
-		95
-		96	struct edid cached_edid; / for DP logical ports - make tiling work */
95	};	97	};
96		98
97	/**	99	/**
98	* struct drm_dp_mst_branch - MST branch device.	100	* struct drm_dp_mst_branch - MST branch device.
99	* @kref: reference count for this port.	101	* @kref: reference count for this port.
100	* @rad: Relative Address to talk to this branch device.	102	* @rad: Relative Address to talk to this branch device.
101	* @lct: Link count total to talk to this branch device.	103	* @lct: Link count total to talk to this branch device.
102	* @num_ports: number of ports on the branch.	104	* @num_ports: number of ports on the branch.
103	* @msg_slots: one bit per transmitted msg slot.	105	* @msg_slots: one bit per transmitted msg slot.
104	* @ports: linked list of ports on this branch.	106	* @ports: linked list of ports on this branch.
105	* @port_parent: pointer to the port parent, NULL if toplevel.	107	* @port_parent: pointer to the port parent, NULL if toplevel.
106	* @mgr: topology manager for this branch device.	108	* @mgr: topology manager for this branch device.
107	* @tx_slots: transmission slots for this device.	109	* @tx_slots: transmission slots for this device.
108	* @last_seqno: last sequence number used to talk to this.	110	* @last_seqno: last sequence number used to talk to this.
109	* @link_address_sent: if a link address message has been sent to this device yet.	111	* @link_address_sent: if a link address message has been sent to this device yet.
110	*	112	*
111	* This structure represents an MST branch device, there is one	113	* This structure represents an MST branch device, there is one
112	* primary branch device at the root, along with any others connected	114	* primary branch device at the root, along with any others connected
113	* to downstream ports	115	* to downstream ports
114	*/	116	*/
115	struct drm_dp_mst_branch {	117	struct drm_dp_mst_branch {
116	struct kref kref;	118	struct kref kref;
117	u8 rad[8];	119	u8 rad[8];
118	u8 lct;	120	u8 lct;
119	int num_ports;	121	int num_ports;
120		122
121	int msg_slots;	123	int msg_slots;
122	struct list_head ports;	124	struct list_head ports;
123		125
124	/* list of tx ops queue for this port */	126	/* list of tx ops queue for this port */
125	struct drm_dp_mst_port *port_parent;	127	struct drm_dp_mst_port *port_parent;
126	struct drm_dp_mst_topology_mgr *mgr;	128	struct drm_dp_mst_topology_mgr *mgr;
127		129
128	/* slots are protected by mstb->mgr->qlock */	130	/* slots are protected by mstb->mgr->qlock */
129	struct drm_dp_sideband_msg_tx *tx_slots[2];	131	struct drm_dp_sideband_msg_tx *tx_slots[2];
130	int last_seqno;	132	int last_seqno;
131	bool link_address_sent;	133	bool link_address_sent;
132	};	134	};
133		135
134		136
135	/* sideband msg header - not bit struct */	137	/* sideband msg header - not bit struct */
136	struct drm_dp_sideband_msg_hdr {	138	struct drm_dp_sideband_msg_hdr {
137	u8 lct;	139	u8 lct;
138	u8 lcr;	140	u8 lcr;
139	u8 rad[8];	141	u8 rad[8];
140	bool broadcast;	142	bool broadcast;
141	bool path_msg;	143	bool path_msg;
142	u8 msg_len;	144	u8 msg_len;
143	bool somt;	145	bool somt;
144	bool eomt;	146	bool eomt;
145	bool seqno;	147	bool seqno;
146	};	148	};
147		149
148	struct drm_dp_nak_reply {	150	struct drm_dp_nak_reply {
149	u8 guid[16];	151	u8 guid[16];
150	u8 reason;	152	u8 reason;
151	u8 nak_data;	153	u8 nak_data;
152	};	154	};
153		155
154	struct drm_dp_link_address_ack_reply {	156	struct drm_dp_link_address_ack_reply {
155	u8 guid[16];	157	u8 guid[16];
156	u8 nports;	158	u8 nports;
157	struct drm_dp_link_addr_reply_port {	159	struct drm_dp_link_addr_reply_port {
158	bool input_port;	160	bool input_port;
159	u8 peer_device_type;	161	u8 peer_device_type;
160	u8 port_number;	162	u8 port_number;
161	bool mcs;	163	bool mcs;
162	bool ddps;	164	bool ddps;
163	bool legacy_device_plug_status;	165	bool legacy_device_plug_status;
164	u8 dpcd_revision;	166	u8 dpcd_revision;
165	u8 peer_guid[16];	167	u8 peer_guid[16];
166	u8 num_sdp_streams;	168	u8 num_sdp_streams;
167	u8 num_sdp_stream_sinks;	169	u8 num_sdp_stream_sinks;
168	} ports[16];	170	} ports[16];
169	};	171	};
170		172
171	struct drm_dp_remote_dpcd_read_ack_reply {	173	struct drm_dp_remote_dpcd_read_ack_reply {
172	u8 port_number;	174	u8 port_number;
173	u8 num_bytes;	175	u8 num_bytes;
174	u8 bytes[255];	176	u8 bytes[255];
175	};	177	};
176		178
177	struct drm_dp_remote_dpcd_write_ack_reply {	179	struct drm_dp_remote_dpcd_write_ack_reply {
178	u8 port_number;	180	u8 port_number;
179	};	181	};
180		182
181	struct drm_dp_remote_dpcd_write_nak_reply {	183	struct drm_dp_remote_dpcd_write_nak_reply {
182	u8 port_number;	184	u8 port_number;
183	u8 reason;	185	u8 reason;
184	u8 bytes_written_before_failure;	186	u8 bytes_written_before_failure;
185	};	187	};
186		188
187	struct drm_dp_remote_i2c_read_ack_reply {	189	struct drm_dp_remote_i2c_read_ack_reply {
188	u8 port_number;	190	u8 port_number;
189	u8 num_bytes;	191	u8 num_bytes;
190	u8 bytes[255];	192	u8 bytes[255];
191	};	193	};
192		194
193	struct drm_dp_remote_i2c_read_nak_reply {	195	struct drm_dp_remote_i2c_read_nak_reply {
194	u8 port_number;	196	u8 port_number;
195	u8 nak_reason;	197	u8 nak_reason;
196	u8 i2c_nak_transaction;	198	u8 i2c_nak_transaction;
197	};	199	};
198		200
199	struct drm_dp_remote_i2c_write_ack_reply {	201	struct drm_dp_remote_i2c_write_ack_reply {
200	u8 port_number;	202	u8 port_number;
201	};	203	};
202		204
203		205
204	struct drm_dp_sideband_msg_rx {	206	struct drm_dp_sideband_msg_rx {
205	u8 chunk[48];	207	u8 chunk[48];
206	u8 msg[256];	208	u8 msg[256];
207	u8 curchunk_len;	209	u8 curchunk_len;
208	u8 curchunk_idx; /* chunk we are parsing now */	210	u8 curchunk_idx; /* chunk we are parsing now */
209	u8 curchunk_hdrlen;	211	u8 curchunk_hdrlen;
210	u8 curlen; /* total length of the msg */	212	u8 curlen; /* total length of the msg */
211	bool have_somt;	213	bool have_somt;
212	bool have_eomt;	214	bool have_eomt;
213	struct drm_dp_sideband_msg_hdr initial_hdr;	215	struct drm_dp_sideband_msg_hdr initial_hdr;
214	};	216	};
215		217
216		218
217	struct drm_dp_allocate_payload {	219	struct drm_dp_allocate_payload {
218	u8 port_number;	220	u8 port_number;
219	u8 number_sdp_streams;	221	u8 number_sdp_streams;
220	u8 vcpi;	222	u8 vcpi;
221	u16 pbn;	223	u16 pbn;
222	u8 sdp_stream_sink[8];	224	u8 sdp_stream_sink[8];
223	};	225	};
224		226
225	struct drm_dp_allocate_payload_ack_reply {	227	struct drm_dp_allocate_payload_ack_reply {
226	u8 port_number;	228	u8 port_number;
227	u8 vcpi;	229	u8 vcpi;
228	u16 allocated_pbn;	230	u16 allocated_pbn;
229	};	231	};
230		232
231	struct drm_dp_connection_status_notify {	233	struct drm_dp_connection_status_notify {
232	u8 guid[16];	234	u8 guid[16];
233	u8 port_number;	235	u8 port_number;
234	bool legacy_device_plug_status;	236	bool legacy_device_plug_status;
235	bool displayport_device_plug_status;	237	bool displayport_device_plug_status;
236	bool message_capability_status;	238	bool message_capability_status;
237	bool input_port;	239	bool input_port;
238	u8 peer_device_type;	240	u8 peer_device_type;
239	};	241	};
240		242
241	struct drm_dp_remote_dpcd_read {	243	struct drm_dp_remote_dpcd_read {
242	u8 port_number;	244	u8 port_number;
243	u32 dpcd_address;	245	u32 dpcd_address;
244	u8 num_bytes;	246	u8 num_bytes;
245	};	247	};
246		248
247	struct drm_dp_remote_dpcd_write {	249	struct drm_dp_remote_dpcd_write {
248	u8 port_number;	250	u8 port_number;
249	u32 dpcd_address;	251	u32 dpcd_address;
250	u8 num_bytes;	252	u8 num_bytes;
251	u8 *bytes;	253	u8 *bytes;
252	};	254	};
253		255
254	struct drm_dp_remote_i2c_read {	256	struct drm_dp_remote_i2c_read {
255	u8 num_transactions;	257	u8 num_transactions;
256	u8 port_number;	258	u8 port_number;
257	struct {	259	struct {
258	u8 i2c_dev_id;	260	u8 i2c_dev_id;
259	u8 num_bytes;	261	u8 num_bytes;
260	u8 *bytes;	262	u8 *bytes;
261	u8 no_stop_bit;	263	u8 no_stop_bit;
262	u8 i2c_transaction_delay;	264	u8 i2c_transaction_delay;
263	} transactions[4];	265	} transactions[4];
264	u8 read_i2c_device_id;	266	u8 read_i2c_device_id;
265	u8 num_bytes_read;	267	u8 num_bytes_read;
266	};	268	};
267		269
268	struct drm_dp_remote_i2c_write {	270	struct drm_dp_remote_i2c_write {
269	u8 port_number;	271	u8 port_number;
270	u8 write_i2c_device_id;	272	u8 write_i2c_device_id;
271	u8 num_bytes;	273	u8 num_bytes;
272	u8 *bytes;	274	u8 *bytes;
273	};	275	};
274		276
275	/* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */	277	/* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */
276	struct drm_dp_port_number_req {	278	struct drm_dp_port_number_req {
277	u8 port_number;	279	u8 port_number;
278	};	280	};
279		281
280	struct drm_dp_enum_path_resources_ack_reply {	282	struct drm_dp_enum_path_resources_ack_reply {
281	u8 port_number;	283	u8 port_number;
282	u16 full_payload_bw_number;	284	u16 full_payload_bw_number;
283	u16 avail_payload_bw_number;	285	u16 avail_payload_bw_number;
284	};	286	};
285		287
286	/* covers POWER_DOWN_PHY, POWER_UP_PHY */	288	/* covers POWER_DOWN_PHY, POWER_UP_PHY */
287	struct drm_dp_port_number_rep {	289	struct drm_dp_port_number_rep {
288	u8 port_number;	290	u8 port_number;
289	};	291	};
290		292
291	struct drm_dp_query_payload {	293	struct drm_dp_query_payload {
292	u8 port_number;	294	u8 port_number;
293	u8 vcpi;	295	u8 vcpi;
294	};	296	};
295		297
296	struct drm_dp_resource_status_notify {	298	struct drm_dp_resource_status_notify {
297	u8 port_number;	299	u8 port_number;
298	u8 guid[16];	300	u8 guid[16];
299	u16 available_pbn;	301	u16 available_pbn;
300	};	302	};
301		303
302	struct drm_dp_query_payload_ack_reply {	304	struct drm_dp_query_payload_ack_reply {
303	u8 port_number;	305	u8 port_number;
304	u8 allocated_pbn;	306	u8 allocated_pbn;
305	};	307	};
306		308
307	struct drm_dp_sideband_msg_req_body {	309	struct drm_dp_sideband_msg_req_body {
308	u8 req_type;	310	u8 req_type;
309	union ack_req {	311	union ack_req {
310	struct drm_dp_connection_status_notify conn_stat;	312	struct drm_dp_connection_status_notify conn_stat;
311	struct drm_dp_port_number_req port_num;	313	struct drm_dp_port_number_req port_num;
312	struct drm_dp_resource_status_notify resource_stat;	314	struct drm_dp_resource_status_notify resource_stat;
313		315
314	struct drm_dp_query_payload query_payload;	316	struct drm_dp_query_payload query_payload;
315	struct drm_dp_allocate_payload allocate_payload;	317	struct drm_dp_allocate_payload allocate_payload;
316		318
317	struct drm_dp_remote_dpcd_read dpcd_read;	319	struct drm_dp_remote_dpcd_read dpcd_read;
318	struct drm_dp_remote_dpcd_write dpcd_write;	320	struct drm_dp_remote_dpcd_write dpcd_write;
319		321
320	struct drm_dp_remote_i2c_read i2c_read;	322	struct drm_dp_remote_i2c_read i2c_read;
321	struct drm_dp_remote_i2c_write i2c_write;	323	struct drm_dp_remote_i2c_write i2c_write;
322	} u;	324	} u;
323	};	325	};
324		326
325	struct drm_dp_sideband_msg_reply_body {	327	struct drm_dp_sideband_msg_reply_body {
326	u8 reply_type;	328	u8 reply_type;
327	u8 req_type;	329	u8 req_type;
328	union ack_replies {	330	union ack_replies {
329	struct drm_dp_nak_reply nak;	331	struct drm_dp_nak_reply nak;
330	struct drm_dp_link_address_ack_reply link_addr;	332	struct drm_dp_link_address_ack_reply link_addr;
331	struct drm_dp_port_number_rep port_number;	333	struct drm_dp_port_number_rep port_number;
332		334
333	struct drm_dp_enum_path_resources_ack_reply path_resources;	335	struct drm_dp_enum_path_resources_ack_reply path_resources;
334	struct drm_dp_allocate_payload_ack_reply allocate_payload;	336	struct drm_dp_allocate_payload_ack_reply allocate_payload;
335	struct drm_dp_query_payload_ack_reply query_payload;	337	struct drm_dp_query_payload_ack_reply query_payload;
336		338
337	struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack;	339	struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack;
338	struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack;	340	struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack;
339	struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack;	341	struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack;
340		342
341	struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack;	343	struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack;
342	struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack;	344	struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack;
343	struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack;	345	struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack;
344	} u;	346	} u;
345	};	347	};
346		348
347	/* msg is queued to be put into a slot */	349	/* msg is queued to be put into a slot */
348	#define DRM_DP_SIDEBAND_TX_QUEUED 0	350	#define DRM_DP_SIDEBAND_TX_QUEUED 0
349	/* msg has started transmitting on a slot - still on msgq */	351	/* msg has started transmitting on a slot - still on msgq */
350	#define DRM_DP_SIDEBAND_TX_START_SEND 1	352	#define DRM_DP_SIDEBAND_TX_START_SEND 1
351	/* msg has finished transmitting on a slot - removed from msgq only in slot */	353	/* msg has finished transmitting on a slot - removed from msgq only in slot */
352	#define DRM_DP_SIDEBAND_TX_SENT 2	354	#define DRM_DP_SIDEBAND_TX_SENT 2
353	/* msg has received a response - removed from slot */	355	/* msg has received a response - removed from slot */
354	#define DRM_DP_SIDEBAND_TX_RX 3	356	#define DRM_DP_SIDEBAND_TX_RX 3
355	#define DRM_DP_SIDEBAND_TX_TIMEOUT 4	357	#define DRM_DP_SIDEBAND_TX_TIMEOUT 4
356		358
357	struct drm_dp_sideband_msg_tx {	359	struct drm_dp_sideband_msg_tx {
358	u8 msg[256];	360	u8 msg[256];
359	u8 chunk[48];	361	u8 chunk[48];
360	u8 cur_offset;	362	u8 cur_offset;
361	u8 cur_len;	363	u8 cur_len;
362	struct drm_dp_mst_branch *dst;	364	struct drm_dp_mst_branch *dst;
363	struct list_head next;	365	struct list_head next;
364	int seqno;	366	int seqno;
365	int state;	367	int state;
366	bool path_msg;	368	bool path_msg;
367	struct drm_dp_sideband_msg_reply_body reply;	369	struct drm_dp_sideband_msg_reply_body reply;
368	};	370	};
369		371
370	/* sideband msg handler */	372	/* sideband msg handler */
371	struct drm_dp_mst_topology_mgr;	373	struct drm_dp_mst_topology_mgr;
372	struct drm_dp_mst_topology_cbs {	374	struct drm_dp_mst_topology_cbs {
373	/* create a connector for a port */	375	/* create a connector for a port */
374	struct drm_connector (add_connector)(struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port, char *path);	376	struct drm_connector (add_connector)(struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port, const char *path);
375	void (destroy_connector)(struct drm_dp_mst_topology_mgr mgr,	377	void (destroy_connector)(struct drm_dp_mst_topology_mgr mgr,
376	struct drm_connector *connector);	378	struct drm_connector *connector);
377	void (hotplug)(struct drm_dp_mst_topology_mgr mgr);	379	void (hotplug)(struct drm_dp_mst_topology_mgr mgr);
378		380
379	};	381	};
380		382
381	#define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8)	383	#define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8)
382		384
383	#define DP_PAYLOAD_LOCAL 1	385	#define DP_PAYLOAD_LOCAL 1
384	#define DP_PAYLOAD_REMOTE 2	386	#define DP_PAYLOAD_REMOTE 2
385	#define DP_PAYLOAD_DELETE_LOCAL 3	387	#define DP_PAYLOAD_DELETE_LOCAL 3
386		388
387	struct drm_dp_payload {	389	struct drm_dp_payload {
388	int payload_state;	390	int payload_state;
389	int start_slot;	391	int start_slot;
390	int num_slots;	392	int num_slots;
-		393	int vcpi;
391	};	394	};
392		395
393	/**	396	/**
394	* struct drm_dp_mst_topology_mgr - DisplayPort MST manager	397	* struct drm_dp_mst_topology_mgr - DisplayPort MST manager
395	* @dev: device pointer for adding i2c devices etc.	398	* @dev: device pointer for adding i2c devices etc.
396	* @cbs: callbacks for connector addition and destruction.	399	* @cbs: callbacks for connector addition and destruction.
397	* @max_dpcd_transaction_bytes - maximum number of bytes to read/write in one go.	400	* @max_dpcd_transaction_bytes - maximum number of bytes to read/write in one go.
398	* @aux: aux channel for the DP connector.	401	* @aux: aux channel for the DP connector.
399	* @max_payloads: maximum number of payloads the GPU can generate.	402	* @max_payloads: maximum number of payloads the GPU can generate.
400	* @conn_base_id: DRM connector ID this mgr is connected to.	403	* @conn_base_id: DRM connector ID this mgr is connected to.
401	* @down_rep_recv: msg receiver state for down replies.	404	* @down_rep_recv: msg receiver state for down replies.
402	* @up_req_recv: msg receiver state for up requests.	405	* @up_req_recv: msg receiver state for up requests.
403	* @lock: protects mst state, primary, guid, dpcd.	406	* @lock: protects mst state, primary, guid, dpcd.
404	* @mst_state: if this manager is enabled for an MST capable port.	407	* @mst_state: if this manager is enabled for an MST capable port.
405	* @mst_primary: pointer to the primary branch device.	408	* @mst_primary: pointer to the primary branch device.
406	* @guid_valid: GUID valid for the primary branch device.	409	* @guid_valid: GUID valid for the primary branch device.
407	* @guid: GUID for primary port.	410	* @guid: GUID for primary port.
408	* @dpcd: cache of DPCD for primary port.	411	* @dpcd: cache of DPCD for primary port.
409	* @pbn_div: PBN to slots divisor.	412	* @pbn_div: PBN to slots divisor.
410	*	413	*
411	* This struct represents the toplevel displayport MST topology manager.	414	* This struct represents the toplevel displayport MST topology manager.
412	* There should be one instance of this for every MST capable DP connector	415	* There should be one instance of this for every MST capable DP connector
413	* on the GPU.	416	* on the GPU.
414	*/	417	*/
415	struct drm_dp_mst_topology_mgr {	418	struct drm_dp_mst_topology_mgr {
416		419
417	struct device *dev;	420	struct device *dev;
418	struct drm_dp_mst_topology_cbs *cbs;	421	struct drm_dp_mst_topology_cbs *cbs;
419	int max_dpcd_transaction_bytes;	422	int max_dpcd_transaction_bytes;
420	struct drm_dp_aux aux; / auxch for this topology mgr to use */	423	struct drm_dp_aux aux; / auxch for this topology mgr to use */
421	int max_payloads;	424	int max_payloads;
422	int conn_base_id;	425	int conn_base_id;
423		426
424	/* only ever accessed from the workqueue - which should be serialised */	427	/* only ever accessed from the workqueue - which should be serialised */
425	struct drm_dp_sideband_msg_rx down_rep_recv;	428	struct drm_dp_sideband_msg_rx down_rep_recv;
426	struct drm_dp_sideband_msg_rx up_req_recv;	429	struct drm_dp_sideband_msg_rx up_req_recv;
427		430
428	/* pointer to info about the initial MST device */	431	/* pointer to info about the initial MST device */
429	struct mutex lock; /* protects mst_state + primary + guid + dpcd */	432	struct mutex lock; /* protects mst_state + primary + guid + dpcd */
430		433
431	bool mst_state;	434	bool mst_state;
432	struct drm_dp_mst_branch *mst_primary;	435	struct drm_dp_mst_branch *mst_primary;
433	/* primary MST device GUID */	436	/* primary MST device GUID */
434	bool guid_valid;	437	bool guid_valid;
435	u8 guid[16];	438	u8 guid[16];
436	u8 dpcd[DP_RECEIVER_CAP_SIZE];	439	u8 dpcd[DP_RECEIVER_CAP_SIZE];
437	u8 sink_count;	440	u8 sink_count;
438	int pbn_div;	441	int pbn_div;
439	int total_slots;	442	int total_slots;
440	int avail_slots;	443	int avail_slots;
441	int total_pbn;	444	int total_pbn;
442		445
443	/* messages to be transmitted */	446	/* messages to be transmitted */
444	/* qlock protects the upq/downq and in_progress,	447	/* qlock protects the upq/downq and in_progress,
445	the mstb tx_slots and txmsg->state once they are queued */	448	the mstb tx_slots and txmsg->state once they are queued */
446	struct mutex qlock;	449	struct mutex qlock;
447	struct list_head tx_msg_downq;	450	struct list_head tx_msg_downq;
448	struct list_head tx_msg_upq;	451	struct list_head tx_msg_upq;
449	bool tx_down_in_progress;	452	bool tx_down_in_progress;
450	bool tx_up_in_progress;	453	bool tx_up_in_progress;
451		454
452	/* payload info + lock for it */	455	/* payload info + lock for it */
453	struct mutex payload_lock;	456	struct mutex payload_lock;
454	struct drm_dp_vcpi **proposed_vcpis;	457	struct drm_dp_vcpi **proposed_vcpis;
455	struct drm_dp_payload *payloads;	458	struct drm_dp_payload *payloads;
456	unsigned long payload_mask;	459	unsigned long payload_mask;
-		460	unsigned long vcpi_mask;
457		461
458	wait_queue_head_t tx_waitq;	462	wait_queue_head_t tx_waitq;
459	struct work_struct work;	463	struct work_struct work;
460		464
461	struct work_struct tx_work;	465	struct work_struct tx_work;
462	};	466	};
463		467
464	int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr mgr, struct device dev, struct drm_dp_aux *aux, int max_dpcd_transaction_bytes, int max_payloads, int conn_base_id);	468	int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr mgr, struct device dev, struct drm_dp_aux *aux, int max_dpcd_transaction_bytes, int max_payloads, int conn_base_id);
465		469
466	void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr);	470	void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr);
467		471
468		472
469	int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state);	473	int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state);
470		474
471		475
472	int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr mgr, u8 esi, bool *handled);	476	int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr mgr, u8 esi, bool *handled);
473		477
474		478
475	enum drm_connector_status drm_dp_mst_detect_port(struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port);	479	enum drm_connector_status drm_dp_mst_detect_port(struct drm_connector connector, struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port *port);
476		480
477	struct edid drm_dp_mst_get_edid(struct drm_connector connector, struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port);	481	struct edid drm_dp_mst_get_edid(struct drm_connector connector, struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port);
478		482
479		483
480	int drm_dp_calc_pbn_mode(int clock, int bpp);	484	int drm_dp_calc_pbn_mode(int clock, int bpp);
481		485
482		486
483	bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port, int pbn, int *slots);	487	bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port, int pbn, int *slots);
484		488
485		489
486	void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port);	490	void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port);
487		491
488		492
489	void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr,	493	void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr,
490	struct drm_dp_mst_port *port);	494	struct drm_dp_mst_port *port);
491		495
492		496
493	int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr,	497	int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr,
494	int pbn);	498	int pbn);
495		499
496		500

Subversion Repositories Kolibri OS

(root)/drivers/include/drm/drm_dp_mst_helper.h – Rev 5056 → 5270