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ad7f8a1f DA |
1 | /* |
2 | * Copyright © 2014 Red Hat. | |
3 | * | |
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 | |
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 | |
8 | * that the name of the copyright holders not be used in advertising or | |
9 | * publicity pertaining to distribution of the software without specific, | |
10 | * written prior permission. The copyright holders make no representations | |
11 | * about the suitability of this software for any purpose. It is provided "as | |
12 | * is" without express or implied warranty. | |
13 | * | |
14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
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, | |
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 | |
20 | * OF THIS SOFTWARE. | |
21 | */ | |
22 | #ifndef _DRM_DP_MST_HELPER_H_ | |
23 | #define _DRM_DP_MST_HELPER_H_ | |
24 | ||
25 | #include <linux/types.h> | |
26 | #include <drm/drm_dp_helper.h> | |
27 | ||
28 | struct drm_dp_mst_branch; | |
29 | ||
30 | /** | |
32197aab | 31 | * struct drm_dp_vcpi - Virtual Channel Payload Identifier |
ad7f8a1f DA |
32 | * @vcpi: Virtual channel ID. |
33 | * @pbn: Payload Bandwidth Number for this channel | |
34 | * @aligned_pbn: PBN aligned with slot size | |
35 | * @num_slots: number of slots for this PBN | |
36 | */ | |
37 | struct drm_dp_vcpi { | |
38 | int vcpi; | |
39 | int pbn; | |
40 | int aligned_pbn; | |
41 | int num_slots; | |
42 | }; | |
43 | ||
44 | /** | |
45 | * struct drm_dp_mst_port - MST port | |
46 | * @kref: reference count for this port. | |
ad7f8a1f DA |
47 | * @port_num: port number |
48 | * @input: if this port is an input port. | |
49 | * @mcs: message capability status - DP 1.2 spec. | |
50 | * @ddps: DisplayPort Device Plug Status - DP 1.2 | |
51 | * @pdt: Peer Device Type | |
52 | * @ldps: Legacy Device Plug Status | |
53 | * @dpcd_rev: DPCD revision of device on this port | |
54 | * @num_sdp_streams: Number of simultaneous streams | |
55 | * @num_sdp_stream_sinks: Number of stream sinks | |
56 | * @available_pbn: Available bandwidth for this port. | |
57 | * @next: link to next port on this branch device | |
58 | * @mstb: branch device attach below this port | |
59 | * @aux: i2c aux transport to talk to device connected to this port. | |
60 | * @parent: branch device parent of this port | |
61 | * @vcpi: Virtual Channel Payload info for this port. | |
62 | * @connector: DRM connector this port is connected to. | |
63 | * @mgr: topology manager this port lives under. | |
64 | * | |
65 | * This structure represents an MST port endpoint on a device somewhere | |
66 | * in the MST topology. | |
67 | */ | |
68 | struct drm_dp_mst_port { | |
69 | struct kref kref; | |
70 | ||
ad7f8a1f DA |
71 | u8 port_num; |
72 | bool input; | |
73 | bool mcs; | |
74 | bool ddps; | |
75 | u8 pdt; | |
76 | bool ldps; | |
77 | u8 dpcd_rev; | |
78 | u8 num_sdp_streams; | |
79 | u8 num_sdp_stream_sinks; | |
80 | uint16_t available_pbn; | |
81 | struct list_head next; | |
82 | struct drm_dp_mst_branch *mstb; /* pointer to an mstb if this port has one */ | |
83 | struct drm_dp_aux aux; /* i2c bus for this port? */ | |
84 | struct drm_dp_mst_branch *parent; | |
85 | ||
86 | struct drm_dp_vcpi vcpi; | |
87 | struct drm_connector *connector; | |
88 | struct drm_dp_mst_topology_mgr *mgr; | |
c6a0aed4 | 89 | |
132d49d7 DV |
90 | /** |
91 | * @cached_edid: for DP logical ports - make tiling work by ensuring | |
92 | * that the EDID for all connectors is read immediately. | |
93 | */ | |
94 | struct edid *cached_edid; | |
95 | /** | |
96 | * @has_audio: Tracks whether the sink connector to this port is | |
97 | * audio-capable. | |
98 | */ | |
ef8f9bea | 99 | bool has_audio; |
ad7f8a1f DA |
100 | }; |
101 | ||
102 | /** | |
103 | * struct drm_dp_mst_branch - MST branch device. | |
104 | * @kref: reference count for this port. | |
105 | * @rad: Relative Address to talk to this branch device. | |
106 | * @lct: Link count total to talk to this branch device. | |
107 | * @num_ports: number of ports on the branch. | |
108 | * @msg_slots: one bit per transmitted msg slot. | |
109 | * @ports: linked list of ports on this branch. | |
110 | * @port_parent: pointer to the port parent, NULL if toplevel. | |
111 | * @mgr: topology manager for this branch device. | |
112 | * @tx_slots: transmission slots for this device. | |
113 | * @last_seqno: last sequence number used to talk to this. | |
114 | * @link_address_sent: if a link address message has been sent to this device yet. | |
5e93b820 HW |
115 | * @guid: guid for DP 1.2 branch device. port under this branch can be |
116 | * identified by port #. | |
ad7f8a1f DA |
117 | * |
118 | * This structure represents an MST branch device, there is one | |
5e93b820 HW |
119 | * primary branch device at the root, along with any other branches connected |
120 | * to downstream port of parent branches. | |
ad7f8a1f DA |
121 | */ |
122 | struct drm_dp_mst_branch { | |
123 | struct kref kref; | |
124 | u8 rad[8]; | |
125 | u8 lct; | |
126 | int num_ports; | |
127 | ||
128 | int msg_slots; | |
129 | struct list_head ports; | |
130 | ||
131 | /* list of tx ops queue for this port */ | |
132 | struct drm_dp_mst_port *port_parent; | |
133 | struct drm_dp_mst_topology_mgr *mgr; | |
134 | ||
135 | /* slots are protected by mstb->mgr->qlock */ | |
136 | struct drm_dp_sideband_msg_tx *tx_slots[2]; | |
137 | int last_seqno; | |
138 | bool link_address_sent; | |
5e93b820 HW |
139 | |
140 | /* global unique identifier to identify branch devices */ | |
141 | u8 guid[16]; | |
ad7f8a1f DA |
142 | }; |
143 | ||
144 | ||
145 | /* sideband msg header - not bit struct */ | |
146 | struct drm_dp_sideband_msg_hdr { | |
147 | u8 lct; | |
148 | u8 lcr; | |
149 | u8 rad[8]; | |
150 | bool broadcast; | |
151 | bool path_msg; | |
152 | u8 msg_len; | |
153 | bool somt; | |
154 | bool eomt; | |
155 | bool seqno; | |
156 | }; | |
157 | ||
158 | struct drm_dp_nak_reply { | |
159 | u8 guid[16]; | |
160 | u8 reason; | |
161 | u8 nak_data; | |
162 | }; | |
163 | ||
164 | struct drm_dp_link_address_ack_reply { | |
165 | u8 guid[16]; | |
166 | u8 nports; | |
167 | struct drm_dp_link_addr_reply_port { | |
168 | bool input_port; | |
169 | u8 peer_device_type; | |
170 | u8 port_number; | |
171 | bool mcs; | |
172 | bool ddps; | |
173 | bool legacy_device_plug_status; | |
174 | u8 dpcd_revision; | |
175 | u8 peer_guid[16]; | |
176 | u8 num_sdp_streams; | |
177 | u8 num_sdp_stream_sinks; | |
178 | } ports[16]; | |
179 | }; | |
180 | ||
181 | struct drm_dp_remote_dpcd_read_ack_reply { | |
182 | u8 port_number; | |
183 | u8 num_bytes; | |
184 | u8 bytes[255]; | |
185 | }; | |
186 | ||
187 | struct drm_dp_remote_dpcd_write_ack_reply { | |
188 | u8 port_number; | |
189 | }; | |
190 | ||
191 | struct drm_dp_remote_dpcd_write_nak_reply { | |
192 | u8 port_number; | |
193 | u8 reason; | |
194 | u8 bytes_written_before_failure; | |
195 | }; | |
196 | ||
197 | struct drm_dp_remote_i2c_read_ack_reply { | |
198 | u8 port_number; | |
199 | u8 num_bytes; | |
200 | u8 bytes[255]; | |
201 | }; | |
202 | ||
203 | struct drm_dp_remote_i2c_read_nak_reply { | |
204 | u8 port_number; | |
205 | u8 nak_reason; | |
206 | u8 i2c_nak_transaction; | |
207 | }; | |
208 | ||
209 | struct drm_dp_remote_i2c_write_ack_reply { | |
210 | u8 port_number; | |
211 | }; | |
212 | ||
213 | ||
214 | struct drm_dp_sideband_msg_rx { | |
215 | u8 chunk[48]; | |
216 | u8 msg[256]; | |
217 | u8 curchunk_len; | |
218 | u8 curchunk_idx; /* chunk we are parsing now */ | |
219 | u8 curchunk_hdrlen; | |
220 | u8 curlen; /* total length of the msg */ | |
221 | bool have_somt; | |
222 | bool have_eomt; | |
223 | struct drm_dp_sideband_msg_hdr initial_hdr; | |
224 | }; | |
225 | ||
ef8f9bea | 226 | #define DRM_DP_MAX_SDP_STREAMS 16 |
ad7f8a1f DA |
227 | struct drm_dp_allocate_payload { |
228 | u8 port_number; | |
229 | u8 number_sdp_streams; | |
230 | u8 vcpi; | |
231 | u16 pbn; | |
ef8f9bea | 232 | u8 sdp_stream_sink[DRM_DP_MAX_SDP_STREAMS]; |
ad7f8a1f DA |
233 | }; |
234 | ||
235 | struct drm_dp_allocate_payload_ack_reply { | |
236 | u8 port_number; | |
237 | u8 vcpi; | |
238 | u16 allocated_pbn; | |
239 | }; | |
240 | ||
241 | struct drm_dp_connection_status_notify { | |
242 | u8 guid[16]; | |
243 | u8 port_number; | |
244 | bool legacy_device_plug_status; | |
245 | bool displayport_device_plug_status; | |
246 | bool message_capability_status; | |
247 | bool input_port; | |
248 | u8 peer_device_type; | |
249 | }; | |
250 | ||
251 | struct drm_dp_remote_dpcd_read { | |
252 | u8 port_number; | |
253 | u32 dpcd_address; | |
254 | u8 num_bytes; | |
255 | }; | |
256 | ||
257 | struct drm_dp_remote_dpcd_write { | |
258 | u8 port_number; | |
259 | u32 dpcd_address; | |
260 | u8 num_bytes; | |
261 | u8 *bytes; | |
262 | }; | |
263 | ||
ae491542 | 264 | #define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS 4 |
ad7f8a1f DA |
265 | struct drm_dp_remote_i2c_read { |
266 | u8 num_transactions; | |
267 | u8 port_number; | |
268 | struct { | |
269 | u8 i2c_dev_id; | |
270 | u8 num_bytes; | |
271 | u8 *bytes; | |
272 | u8 no_stop_bit; | |
273 | u8 i2c_transaction_delay; | |
ae491542 | 274 | } transactions[DP_REMOTE_I2C_READ_MAX_TRANSACTIONS]; |
ad7f8a1f DA |
275 | u8 read_i2c_device_id; |
276 | u8 num_bytes_read; | |
277 | }; | |
278 | ||
279 | struct drm_dp_remote_i2c_write { | |
280 | u8 port_number; | |
281 | u8 write_i2c_device_id; | |
282 | u8 num_bytes; | |
283 | u8 *bytes; | |
284 | }; | |
285 | ||
286 | /* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */ | |
287 | struct drm_dp_port_number_req { | |
288 | u8 port_number; | |
289 | }; | |
290 | ||
291 | struct drm_dp_enum_path_resources_ack_reply { | |
292 | u8 port_number; | |
293 | u16 full_payload_bw_number; | |
294 | u16 avail_payload_bw_number; | |
295 | }; | |
296 | ||
297 | /* covers POWER_DOWN_PHY, POWER_UP_PHY */ | |
298 | struct drm_dp_port_number_rep { | |
299 | u8 port_number; | |
300 | }; | |
301 | ||
302 | struct drm_dp_query_payload { | |
303 | u8 port_number; | |
304 | u8 vcpi; | |
305 | }; | |
306 | ||
307 | struct drm_dp_resource_status_notify { | |
308 | u8 port_number; | |
309 | u8 guid[16]; | |
310 | u16 available_pbn; | |
311 | }; | |
312 | ||
313 | struct drm_dp_query_payload_ack_reply { | |
314 | u8 port_number; | |
315 | u8 allocated_pbn; | |
316 | }; | |
317 | ||
318 | struct drm_dp_sideband_msg_req_body { | |
319 | u8 req_type; | |
320 | union ack_req { | |
321 | struct drm_dp_connection_status_notify conn_stat; | |
322 | struct drm_dp_port_number_req port_num; | |
323 | struct drm_dp_resource_status_notify resource_stat; | |
324 | ||
325 | struct drm_dp_query_payload query_payload; | |
326 | struct drm_dp_allocate_payload allocate_payload; | |
327 | ||
328 | struct drm_dp_remote_dpcd_read dpcd_read; | |
329 | struct drm_dp_remote_dpcd_write dpcd_write; | |
330 | ||
331 | struct drm_dp_remote_i2c_read i2c_read; | |
332 | struct drm_dp_remote_i2c_write i2c_write; | |
333 | } u; | |
334 | }; | |
335 | ||
336 | struct drm_dp_sideband_msg_reply_body { | |
337 | u8 reply_type; | |
338 | u8 req_type; | |
339 | union ack_replies { | |
340 | struct drm_dp_nak_reply nak; | |
341 | struct drm_dp_link_address_ack_reply link_addr; | |
342 | struct drm_dp_port_number_rep port_number; | |
343 | ||
344 | struct drm_dp_enum_path_resources_ack_reply path_resources; | |
345 | struct drm_dp_allocate_payload_ack_reply allocate_payload; | |
346 | struct drm_dp_query_payload_ack_reply query_payload; | |
347 | ||
348 | struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack; | |
349 | struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack; | |
350 | struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack; | |
351 | ||
352 | struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack; | |
353 | struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack; | |
354 | struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack; | |
355 | } u; | |
356 | }; | |
357 | ||
358 | /* msg is queued to be put into a slot */ | |
359 | #define DRM_DP_SIDEBAND_TX_QUEUED 0 | |
360 | /* msg has started transmitting on a slot - still on msgq */ | |
361 | #define DRM_DP_SIDEBAND_TX_START_SEND 1 | |
362 | /* msg has finished transmitting on a slot - removed from msgq only in slot */ | |
363 | #define DRM_DP_SIDEBAND_TX_SENT 2 | |
364 | /* msg has received a response - removed from slot */ | |
365 | #define DRM_DP_SIDEBAND_TX_RX 3 | |
366 | #define DRM_DP_SIDEBAND_TX_TIMEOUT 4 | |
367 | ||
368 | struct drm_dp_sideband_msg_tx { | |
369 | u8 msg[256]; | |
370 | u8 chunk[48]; | |
371 | u8 cur_offset; | |
372 | u8 cur_len; | |
373 | struct drm_dp_mst_branch *dst; | |
374 | struct list_head next; | |
375 | int seqno; | |
376 | int state; | |
377 | bool path_msg; | |
378 | struct drm_dp_sideband_msg_reply_body reply; | |
379 | }; | |
380 | ||
381 | /* sideband msg handler */ | |
382 | struct drm_dp_mst_topology_mgr; | |
383 | struct drm_dp_mst_topology_cbs { | |
384 | /* create a connector for a port */ | |
12e6cecd | 385 | struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path); |
d9515c5e | 386 | void (*register_connector)(struct drm_connector *connector); |
ad7f8a1f DA |
387 | void (*destroy_connector)(struct drm_dp_mst_topology_mgr *mgr, |
388 | struct drm_connector *connector); | |
389 | void (*hotplug)(struct drm_dp_mst_topology_mgr *mgr); | |
390 | ||
391 | }; | |
392 | ||
393 | #define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8) | |
394 | ||
395 | #define DP_PAYLOAD_LOCAL 1 | |
396 | #define DP_PAYLOAD_REMOTE 2 | |
397 | #define DP_PAYLOAD_DELETE_LOCAL 3 | |
398 | ||
399 | struct drm_dp_payload { | |
400 | int payload_state; | |
401 | int start_slot; | |
402 | int num_slots; | |
dfda0df3 | 403 | int vcpi; |
ad7f8a1f DA |
404 | }; |
405 | ||
406 | /** | |
407 | * struct drm_dp_mst_topology_mgr - DisplayPort MST manager | |
ad7f8a1f DA |
408 | * |
409 | * This struct represents the toplevel displayport MST topology manager. | |
410 | * There should be one instance of this for every MST capable DP connector | |
411 | * on the GPU. | |
412 | */ | |
413 | struct drm_dp_mst_topology_mgr { | |
132d49d7 DV |
414 | /** |
415 | * @dev: device pointer for adding i2c devices etc. | |
416 | */ | |
ad7f8a1f | 417 | struct device *dev; |
132d49d7 DV |
418 | /** |
419 | * @cbs: callbacks for connector addition and destruction. | |
420 | */ | |
69a0f89c | 421 | const struct drm_dp_mst_topology_cbs *cbs; |
132d49d7 DV |
422 | /** |
423 | * @max_dpcd_transaction_bytes: maximum number of bytes to read/write | |
424 | * in one go. | |
425 | */ | |
ad7f8a1f | 426 | int max_dpcd_transaction_bytes; |
132d49d7 DV |
427 | /** |
428 | * @aux: AUX channel for the DP MST connector this topolgy mgr is | |
429 | * controlling. | |
430 | */ | |
431 | struct drm_dp_aux *aux; | |
432 | /** | |
433 | * @max_payloads: maximum number of payloads the GPU can generate. | |
434 | */ | |
ad7f8a1f | 435 | int max_payloads; |
132d49d7 DV |
436 | /** |
437 | * @conn_base_id: DRM connector ID this mgr is connected to. Only used | |
438 | * to build the MST connector path value. | |
439 | */ | |
ad7f8a1f DA |
440 | int conn_base_id; |
441 | ||
132d49d7 DV |
442 | /** |
443 | * @down_rep_recv: Message receiver state for down replies. This and | |
444 | * @up_req_recv are only ever access from the work item, which is | |
445 | * serialised. | |
446 | */ | |
ad7f8a1f | 447 | struct drm_dp_sideband_msg_rx down_rep_recv; |
132d49d7 DV |
448 | /** |
449 | * @up_req_recv: Message receiver state for up requests. This and | |
450 | * @down_rep_recv are only ever access from the work item, which is | |
451 | * serialised. | |
452 | */ | |
ad7f8a1f DA |
453 | struct drm_dp_sideband_msg_rx up_req_recv; |
454 | ||
132d49d7 DV |
455 | /** |
456 | * @lock: protects mst state, primary, dpcd. | |
457 | */ | |
458 | struct mutex lock; | |
ad7f8a1f | 459 | |
132d49d7 DV |
460 | /** |
461 | * @mst_state: If this manager is enabled for an MST capable port. False | |
462 | * if no MST sink/branch devices is connected. | |
463 | */ | |
ad7f8a1f | 464 | bool mst_state; |
132d49d7 DV |
465 | /** |
466 | * @mst_primary: Pointer to the primary/first branch device. | |
467 | */ | |
ad7f8a1f | 468 | struct drm_dp_mst_branch *mst_primary; |
5e93b820 | 469 | |
132d49d7 DV |
470 | /** |
471 | * @dpcd: Cache of DPCD for primary port. | |
472 | */ | |
ad7f8a1f | 473 | u8 dpcd[DP_RECEIVER_CAP_SIZE]; |
132d49d7 DV |
474 | /** |
475 | * @sink_count: Sink count from DEVICE_SERVICE_IRQ_VECTOR_ESI0. | |
476 | */ | |
ad7f8a1f | 477 | u8 sink_count; |
132d49d7 DV |
478 | /** |
479 | * @pbn_div: PBN to slots divisor. | |
480 | */ | |
ad7f8a1f | 481 | int pbn_div; |
132d49d7 DV |
482 | /** |
483 | * @total_slots: Total slots that can be allocated. | |
484 | */ | |
ad7f8a1f | 485 | int total_slots; |
132d49d7 DV |
486 | /** |
487 | * @avail_slots: Still available slots that can be allocated. | |
488 | */ | |
ad7f8a1f | 489 | int avail_slots; |
132d49d7 DV |
490 | /** |
491 | * @total_pbn: Total PBN count. | |
492 | */ | |
ad7f8a1f DA |
493 | int total_pbn; |
494 | ||
132d49d7 DV |
495 | /** |
496 | * @qlock: protects @tx_msg_downq, the tx_slots in struct | |
497 | * &drm_dp_mst_branch and txmsg->state once they are queued | |
498 | */ | |
ad7f8a1f | 499 | struct mutex qlock; |
132d49d7 DV |
500 | /** |
501 | * @tx_msg_downq: List of pending down replies. | |
502 | */ | |
ad7f8a1f | 503 | struct list_head tx_msg_downq; |
ad7f8a1f | 504 | |
132d49d7 DV |
505 | /** |
506 | * @payload_lock: Protect payload information. | |
507 | */ | |
ad7f8a1f | 508 | struct mutex payload_lock; |
132d49d7 DV |
509 | /** |
510 | * @proposed_vcpis: Array of pointers for the new VCPI allocation. The | |
511 | * VCPI structure itself is embedded into the corresponding | |
512 | * &drm_dp_mst_port structure. | |
513 | */ | |
ad7f8a1f | 514 | struct drm_dp_vcpi **proposed_vcpis; |
132d49d7 DV |
515 | /** |
516 | * @payloads: Array of payloads. | |
517 | */ | |
ad7f8a1f | 518 | struct drm_dp_payload *payloads; |
132d49d7 DV |
519 | /** |
520 | * @payload_mask: Elements of @payloads actually in use. Since | |
521 | * reallocation of active outputs isn't possible gaps can be created by | |
522 | * disabling outputs out of order compared to how they've been enabled. | |
523 | */ | |
ad7f8a1f | 524 | unsigned long payload_mask; |
132d49d7 DV |
525 | /** |
526 | * @vcpi_mask: Similar to @payload_mask, but for @proposed_vcpis. | |
527 | */ | |
dfda0df3 | 528 | unsigned long vcpi_mask; |
ad7f8a1f | 529 | |
132d49d7 DV |
530 | /** |
531 | * @tx_waitq: Wait to queue stall for the tx worker. | |
532 | */ | |
ad7f8a1f | 533 | wait_queue_head_t tx_waitq; |
132d49d7 DV |
534 | /** |
535 | * @work: Probe work. | |
536 | */ | |
ad7f8a1f | 537 | struct work_struct work; |
132d49d7 DV |
538 | /** |
539 | * @tx_work: Sideband transmit worker. This can nest within the main | |
540 | * @work worker for each transaction @work launches. | |
541 | */ | |
ad7f8a1f | 542 | struct work_struct tx_work; |
6b8eeca6 | 543 | |
132d49d7 DV |
544 | /** |
545 | * @destroy_connector_list: List of to be destroyed connectors. | |
546 | */ | |
6b8eeca6 | 547 | struct list_head destroy_connector_list; |
132d49d7 DV |
548 | /** |
549 | * @destroy_connector_lock: Protects @connector_list. | |
550 | */ | |
6b8eeca6 | 551 | struct mutex destroy_connector_lock; |
132d49d7 DV |
552 | /** |
553 | * @destroy_connector_work: Work item to destroy connectors. Needed to | |
554 | * avoid locking inversion. | |
555 | */ | |
6b8eeca6 | 556 | struct work_struct destroy_connector_work; |
ad7f8a1f DA |
557 | }; |
558 | ||
559 | 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); | |
560 | ||
561 | void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr); | |
562 | ||
563 | ||
564 | int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state); | |
565 | ||
566 | ||
567 | int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled); | |
568 | ||
569 | ||
c6a0aed4 | 570 | 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); |
ad7f8a1f | 571 | |
ef8f9bea LY |
572 | bool drm_dp_mst_port_has_audio(struct drm_dp_mst_topology_mgr *mgr, |
573 | struct drm_dp_mst_port *port); | |
ad7f8a1f DA |
574 | struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); |
575 | ||
576 | ||
577 | int drm_dp_calc_pbn_mode(int clock, int bpp); | |
578 | ||
579 | ||
580 | bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int *slots); | |
581 | ||
87f5942d DA |
582 | int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); |
583 | ||
ad7f8a1f DA |
584 | |
585 | void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); | |
586 | ||
587 | ||
588 | void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, | |
589 | struct drm_dp_mst_port *port); | |
590 | ||
591 | ||
592 | int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, | |
593 | int pbn); | |
594 | ||
595 | ||
596 | int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr); | |
597 | ||
598 | ||
599 | int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr); | |
600 | ||
601 | int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr); | |
602 | ||
603 | void drm_dp_mst_dump_topology(struct seq_file *m, | |
604 | struct drm_dp_mst_topology_mgr *mgr); | |
605 | ||
606 | void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr); | |
607 | int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr); | |
608 | #endif |