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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> | |
3f3353b7 | 27 | #include <drm/drm_atomic.h> |
ad7f8a1f DA |
28 | |
29 | struct drm_dp_mst_branch; | |
30 | ||
31 | /** | |
32197aab | 32 | * struct drm_dp_vcpi - Virtual Channel Payload Identifier |
ad7f8a1f DA |
33 | * @vcpi: Virtual channel ID. |
34 | * @pbn: Payload Bandwidth Number for this channel | |
35 | * @aligned_pbn: PBN aligned with slot size | |
36 | * @num_slots: number of slots for this PBN | |
37 | */ | |
38 | struct drm_dp_vcpi { | |
39 | int vcpi; | |
40 | int pbn; | |
41 | int aligned_pbn; | |
42 | int num_slots; | |
43 | }; | |
44 | ||
45 | /** | |
46 | * struct drm_dp_mst_port - MST 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 { | |
ebcc0e6b LP |
69 | /** |
70 | * @topology_kref: refcount for this port's lifetime in the topology, | |
71 | * only the DP MST helpers should need to touch this | |
72 | */ | |
73 | struct kref topology_kref; | |
74 | ||
75 | /** | |
76 | * @malloc_kref: refcount for the memory allocation containing this | |
77 | * structure. See drm_dp_mst_get_port_malloc() and | |
78 | * drm_dp_mst_put_port_malloc(). | |
79 | */ | |
80 | struct kref malloc_kref; | |
ad7f8a1f | 81 | |
ad7f8a1f DA |
82 | u8 port_num; |
83 | bool input; | |
84 | bool mcs; | |
85 | bool ddps; | |
86 | u8 pdt; | |
87 | bool ldps; | |
88 | u8 dpcd_rev; | |
89 | u8 num_sdp_streams; | |
90 | u8 num_sdp_stream_sinks; | |
91 | uint16_t available_pbn; | |
92 | struct list_head next; | |
93 | struct drm_dp_mst_branch *mstb; /* pointer to an mstb if this port has one */ | |
94 | struct drm_dp_aux aux; /* i2c bus for this port? */ | |
95 | struct drm_dp_mst_branch *parent; | |
96 | ||
97 | struct drm_dp_vcpi vcpi; | |
98 | struct drm_connector *connector; | |
99 | struct drm_dp_mst_topology_mgr *mgr; | |
c6a0aed4 | 100 | |
132d49d7 SV |
101 | /** |
102 | * @cached_edid: for DP logical ports - make tiling work by ensuring | |
103 | * that the EDID for all connectors is read immediately. | |
104 | */ | |
105 | struct edid *cached_edid; | |
106 | /** | |
107 | * @has_audio: Tracks whether the sink connector to this port is | |
108 | * audio-capable. | |
109 | */ | |
ef8f9bea | 110 | bool has_audio; |
ad7f8a1f DA |
111 | }; |
112 | ||
113 | /** | |
114 | * struct drm_dp_mst_branch - MST branch device. | |
ad7f8a1f DA |
115 | * @rad: Relative Address to talk to this branch device. |
116 | * @lct: Link count total to talk to this branch device. | |
117 | * @num_ports: number of ports on the branch. | |
118 | * @msg_slots: one bit per transmitted msg slot. | |
119 | * @ports: linked list of ports on this branch. | |
120 | * @port_parent: pointer to the port parent, NULL if toplevel. | |
121 | * @mgr: topology manager for this branch device. | |
122 | * @tx_slots: transmission slots for this device. | |
123 | * @last_seqno: last sequence number used to talk to this. | |
124 | * @link_address_sent: if a link address message has been sent to this device yet. | |
5e93b820 HW |
125 | * @guid: guid for DP 1.2 branch device. port under this branch can be |
126 | * identified by port #. | |
ad7f8a1f DA |
127 | * |
128 | * This structure represents an MST branch device, there is one | |
5e93b820 HW |
129 | * primary branch device at the root, along with any other branches connected |
130 | * to downstream port of parent branches. | |
ad7f8a1f DA |
131 | */ |
132 | struct drm_dp_mst_branch { | |
ebcc0e6b LP |
133 | /** |
134 | * @topology_kref: refcount for this branch device's lifetime in the | |
135 | * topology, only the DP MST helpers should need to touch this | |
136 | */ | |
137 | struct kref topology_kref; | |
138 | ||
139 | /** | |
140 | * @malloc_kref: refcount for the memory allocation containing this | |
141 | * structure. See drm_dp_mst_get_mstb_malloc() and | |
142 | * drm_dp_mst_put_mstb_malloc(). | |
143 | */ | |
144 | struct kref malloc_kref; | |
145 | ||
ad7f8a1f DA |
146 | u8 rad[8]; |
147 | u8 lct; | |
148 | int num_ports; | |
149 | ||
150 | int msg_slots; | |
151 | struct list_head ports; | |
152 | ||
153 | /* list of tx ops queue for this port */ | |
154 | struct drm_dp_mst_port *port_parent; | |
155 | struct drm_dp_mst_topology_mgr *mgr; | |
156 | ||
157 | /* slots are protected by mstb->mgr->qlock */ | |
158 | struct drm_dp_sideband_msg_tx *tx_slots[2]; | |
159 | int last_seqno; | |
160 | bool link_address_sent; | |
5e93b820 HW |
161 | |
162 | /* global unique identifier to identify branch devices */ | |
163 | u8 guid[16]; | |
ad7f8a1f DA |
164 | }; |
165 | ||
166 | ||
167 | /* sideband msg header - not bit struct */ | |
168 | struct drm_dp_sideband_msg_hdr { | |
169 | u8 lct; | |
170 | u8 lcr; | |
171 | u8 rad[8]; | |
172 | bool broadcast; | |
173 | bool path_msg; | |
174 | u8 msg_len; | |
175 | bool somt; | |
176 | bool eomt; | |
177 | bool seqno; | |
178 | }; | |
179 | ||
180 | struct drm_dp_nak_reply { | |
181 | u8 guid[16]; | |
182 | u8 reason; | |
183 | u8 nak_data; | |
184 | }; | |
185 | ||
186 | struct drm_dp_link_address_ack_reply { | |
187 | u8 guid[16]; | |
188 | u8 nports; | |
189 | struct drm_dp_link_addr_reply_port { | |
190 | bool input_port; | |
191 | u8 peer_device_type; | |
192 | u8 port_number; | |
193 | bool mcs; | |
194 | bool ddps; | |
195 | bool legacy_device_plug_status; | |
196 | u8 dpcd_revision; | |
197 | u8 peer_guid[16]; | |
198 | u8 num_sdp_streams; | |
199 | u8 num_sdp_stream_sinks; | |
200 | } ports[16]; | |
201 | }; | |
202 | ||
203 | struct drm_dp_remote_dpcd_read_ack_reply { | |
204 | u8 port_number; | |
205 | u8 num_bytes; | |
206 | u8 bytes[255]; | |
207 | }; | |
208 | ||
209 | struct drm_dp_remote_dpcd_write_ack_reply { | |
210 | u8 port_number; | |
211 | }; | |
212 | ||
213 | struct drm_dp_remote_dpcd_write_nak_reply { | |
214 | u8 port_number; | |
215 | u8 reason; | |
216 | u8 bytes_written_before_failure; | |
217 | }; | |
218 | ||
219 | struct drm_dp_remote_i2c_read_ack_reply { | |
220 | u8 port_number; | |
221 | u8 num_bytes; | |
222 | u8 bytes[255]; | |
223 | }; | |
224 | ||
225 | struct drm_dp_remote_i2c_read_nak_reply { | |
226 | u8 port_number; | |
227 | u8 nak_reason; | |
228 | u8 i2c_nak_transaction; | |
229 | }; | |
230 | ||
231 | struct drm_dp_remote_i2c_write_ack_reply { | |
232 | u8 port_number; | |
233 | }; | |
234 | ||
235 | ||
236 | struct drm_dp_sideband_msg_rx { | |
237 | u8 chunk[48]; | |
238 | u8 msg[256]; | |
239 | u8 curchunk_len; | |
240 | u8 curchunk_idx; /* chunk we are parsing now */ | |
241 | u8 curchunk_hdrlen; | |
242 | u8 curlen; /* total length of the msg */ | |
243 | bool have_somt; | |
244 | bool have_eomt; | |
245 | struct drm_dp_sideband_msg_hdr initial_hdr; | |
246 | }; | |
247 | ||
ef8f9bea | 248 | #define DRM_DP_MAX_SDP_STREAMS 16 |
ad7f8a1f DA |
249 | struct drm_dp_allocate_payload { |
250 | u8 port_number; | |
251 | u8 number_sdp_streams; | |
252 | u8 vcpi; | |
253 | u16 pbn; | |
ef8f9bea | 254 | u8 sdp_stream_sink[DRM_DP_MAX_SDP_STREAMS]; |
ad7f8a1f DA |
255 | }; |
256 | ||
257 | struct drm_dp_allocate_payload_ack_reply { | |
258 | u8 port_number; | |
259 | u8 vcpi; | |
260 | u16 allocated_pbn; | |
261 | }; | |
262 | ||
263 | struct drm_dp_connection_status_notify { | |
264 | u8 guid[16]; | |
265 | u8 port_number; | |
266 | bool legacy_device_plug_status; | |
267 | bool displayport_device_plug_status; | |
268 | bool message_capability_status; | |
269 | bool input_port; | |
270 | u8 peer_device_type; | |
271 | }; | |
272 | ||
273 | struct drm_dp_remote_dpcd_read { | |
274 | u8 port_number; | |
275 | u32 dpcd_address; | |
276 | u8 num_bytes; | |
277 | }; | |
278 | ||
279 | struct drm_dp_remote_dpcd_write { | |
280 | u8 port_number; | |
281 | u32 dpcd_address; | |
282 | u8 num_bytes; | |
283 | u8 *bytes; | |
284 | }; | |
285 | ||
ae491542 | 286 | #define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS 4 |
ad7f8a1f DA |
287 | struct drm_dp_remote_i2c_read { |
288 | u8 num_transactions; | |
289 | u8 port_number; | |
290 | struct { | |
291 | u8 i2c_dev_id; | |
292 | u8 num_bytes; | |
293 | u8 *bytes; | |
294 | u8 no_stop_bit; | |
295 | u8 i2c_transaction_delay; | |
ae491542 | 296 | } transactions[DP_REMOTE_I2C_READ_MAX_TRANSACTIONS]; |
ad7f8a1f DA |
297 | u8 read_i2c_device_id; |
298 | u8 num_bytes_read; | |
299 | }; | |
300 | ||
301 | struct drm_dp_remote_i2c_write { | |
302 | u8 port_number; | |
303 | u8 write_i2c_device_id; | |
304 | u8 num_bytes; | |
305 | u8 *bytes; | |
306 | }; | |
307 | ||
308 | /* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */ | |
309 | struct drm_dp_port_number_req { | |
310 | u8 port_number; | |
311 | }; | |
312 | ||
313 | struct drm_dp_enum_path_resources_ack_reply { | |
314 | u8 port_number; | |
315 | u16 full_payload_bw_number; | |
316 | u16 avail_payload_bw_number; | |
317 | }; | |
318 | ||
319 | /* covers POWER_DOWN_PHY, POWER_UP_PHY */ | |
320 | struct drm_dp_port_number_rep { | |
321 | u8 port_number; | |
322 | }; | |
323 | ||
324 | struct drm_dp_query_payload { | |
325 | u8 port_number; | |
326 | u8 vcpi; | |
327 | }; | |
328 | ||
329 | struct drm_dp_resource_status_notify { | |
330 | u8 port_number; | |
331 | u8 guid[16]; | |
332 | u16 available_pbn; | |
333 | }; | |
334 | ||
335 | struct drm_dp_query_payload_ack_reply { | |
336 | u8 port_number; | |
337 | u8 allocated_pbn; | |
338 | }; | |
339 | ||
340 | struct drm_dp_sideband_msg_req_body { | |
341 | u8 req_type; | |
342 | union ack_req { | |
343 | struct drm_dp_connection_status_notify conn_stat; | |
344 | struct drm_dp_port_number_req port_num; | |
345 | struct drm_dp_resource_status_notify resource_stat; | |
346 | ||
347 | struct drm_dp_query_payload query_payload; | |
348 | struct drm_dp_allocate_payload allocate_payload; | |
349 | ||
350 | struct drm_dp_remote_dpcd_read dpcd_read; | |
351 | struct drm_dp_remote_dpcd_write dpcd_write; | |
352 | ||
353 | struct drm_dp_remote_i2c_read i2c_read; | |
354 | struct drm_dp_remote_i2c_write i2c_write; | |
355 | } u; | |
356 | }; | |
357 | ||
358 | struct drm_dp_sideband_msg_reply_body { | |
359 | u8 reply_type; | |
360 | u8 req_type; | |
361 | union ack_replies { | |
362 | struct drm_dp_nak_reply nak; | |
363 | struct drm_dp_link_address_ack_reply link_addr; | |
364 | struct drm_dp_port_number_rep port_number; | |
365 | ||
366 | struct drm_dp_enum_path_resources_ack_reply path_resources; | |
367 | struct drm_dp_allocate_payload_ack_reply allocate_payload; | |
368 | struct drm_dp_query_payload_ack_reply query_payload; | |
369 | ||
370 | struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack; | |
371 | struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack; | |
372 | struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack; | |
373 | ||
374 | struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack; | |
375 | struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack; | |
376 | struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack; | |
377 | } u; | |
378 | }; | |
379 | ||
380 | /* msg is queued to be put into a slot */ | |
381 | #define DRM_DP_SIDEBAND_TX_QUEUED 0 | |
382 | /* msg has started transmitting on a slot - still on msgq */ | |
383 | #define DRM_DP_SIDEBAND_TX_START_SEND 1 | |
384 | /* msg has finished transmitting on a slot - removed from msgq only in slot */ | |
385 | #define DRM_DP_SIDEBAND_TX_SENT 2 | |
386 | /* msg has received a response - removed from slot */ | |
387 | #define DRM_DP_SIDEBAND_TX_RX 3 | |
388 | #define DRM_DP_SIDEBAND_TX_TIMEOUT 4 | |
389 | ||
390 | struct drm_dp_sideband_msg_tx { | |
391 | u8 msg[256]; | |
392 | u8 chunk[48]; | |
393 | u8 cur_offset; | |
394 | u8 cur_len; | |
395 | struct drm_dp_mst_branch *dst; | |
396 | struct list_head next; | |
397 | int seqno; | |
398 | int state; | |
399 | bool path_msg; | |
400 | struct drm_dp_sideband_msg_reply_body reply; | |
401 | }; | |
402 | ||
403 | /* sideband msg handler */ | |
404 | struct drm_dp_mst_topology_mgr; | |
405 | struct drm_dp_mst_topology_cbs { | |
406 | /* create a connector for a port */ | |
12e6cecd | 407 | struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path); |
d9515c5e | 408 | void (*register_connector)(struct drm_connector *connector); |
ad7f8a1f DA |
409 | void (*destroy_connector)(struct drm_dp_mst_topology_mgr *mgr, |
410 | struct drm_connector *connector); | |
ad7f8a1f DA |
411 | }; |
412 | ||
413 | #define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8) | |
414 | ||
415 | #define DP_PAYLOAD_LOCAL 1 | |
416 | #define DP_PAYLOAD_REMOTE 2 | |
417 | #define DP_PAYLOAD_DELETE_LOCAL 3 | |
418 | ||
419 | struct drm_dp_payload { | |
420 | int payload_state; | |
421 | int start_slot; | |
422 | int num_slots; | |
dfda0df3 | 423 | int vcpi; |
ad7f8a1f DA |
424 | }; |
425 | ||
a4370c77 VS |
426 | #define to_dp_mst_topology_state(x) container_of(x, struct drm_dp_mst_topology_state, base) |
427 | ||
eceae147 LP |
428 | struct drm_dp_vcpi_allocation { |
429 | struct drm_dp_mst_port *port; | |
430 | int vcpi; | |
431 | struct list_head next; | |
432 | }; | |
433 | ||
3f3353b7 | 434 | struct drm_dp_mst_topology_state { |
a4370c77 | 435 | struct drm_private_state base; |
eceae147 | 436 | struct list_head vcpis; |
3f3353b7 PD |
437 | struct drm_dp_mst_topology_mgr *mgr; |
438 | }; | |
439 | ||
a4370c77 VS |
440 | #define to_dp_mst_topology_mgr(x) container_of(x, struct drm_dp_mst_topology_mgr, base) |
441 | ||
ad7f8a1f DA |
442 | /** |
443 | * struct drm_dp_mst_topology_mgr - DisplayPort MST manager | |
ad7f8a1f DA |
444 | * |
445 | * This struct represents the toplevel displayport MST topology manager. | |
446 | * There should be one instance of this for every MST capable DP connector | |
447 | * on the GPU. | |
448 | */ | |
449 | struct drm_dp_mst_topology_mgr { | |
a4370c77 VS |
450 | /** |
451 | * @base: Base private object for atomic | |
452 | */ | |
453 | struct drm_private_obj base; | |
454 | ||
132d49d7 SV |
455 | /** |
456 | * @dev: device pointer for adding i2c devices etc. | |
457 | */ | |
7b0a89a6 | 458 | struct drm_device *dev; |
132d49d7 SV |
459 | /** |
460 | * @cbs: callbacks for connector addition and destruction. | |
461 | */ | |
69a0f89c | 462 | const struct drm_dp_mst_topology_cbs *cbs; |
132d49d7 SV |
463 | /** |
464 | * @max_dpcd_transaction_bytes: maximum number of bytes to read/write | |
465 | * in one go. | |
466 | */ | |
ad7f8a1f | 467 | int max_dpcd_transaction_bytes; |
132d49d7 SV |
468 | /** |
469 | * @aux: AUX channel for the DP MST connector this topolgy mgr is | |
470 | * controlling. | |
471 | */ | |
472 | struct drm_dp_aux *aux; | |
473 | /** | |
474 | * @max_payloads: maximum number of payloads the GPU can generate. | |
475 | */ | |
ad7f8a1f | 476 | int max_payloads; |
132d49d7 SV |
477 | /** |
478 | * @conn_base_id: DRM connector ID this mgr is connected to. Only used | |
479 | * to build the MST connector path value. | |
480 | */ | |
ad7f8a1f DA |
481 | int conn_base_id; |
482 | ||
132d49d7 SV |
483 | /** |
484 | * @down_rep_recv: Message receiver state for down replies. This and | |
485 | * @up_req_recv are only ever access from the work item, which is | |
486 | * serialised. | |
487 | */ | |
ad7f8a1f | 488 | struct drm_dp_sideband_msg_rx down_rep_recv; |
132d49d7 SV |
489 | /** |
490 | * @up_req_recv: Message receiver state for up requests. This and | |
491 | * @down_rep_recv are only ever access from the work item, which is | |
492 | * serialised. | |
493 | */ | |
ad7f8a1f DA |
494 | struct drm_dp_sideband_msg_rx up_req_recv; |
495 | ||
132d49d7 SV |
496 | /** |
497 | * @lock: protects mst state, primary, dpcd. | |
498 | */ | |
499 | struct mutex lock; | |
ad7f8a1f | 500 | |
132d49d7 SV |
501 | /** |
502 | * @mst_state: If this manager is enabled for an MST capable port. False | |
503 | * if no MST sink/branch devices is connected. | |
504 | */ | |
ad7f8a1f | 505 | bool mst_state; |
132d49d7 SV |
506 | /** |
507 | * @mst_primary: Pointer to the primary/first branch device. | |
508 | */ | |
ad7f8a1f | 509 | struct drm_dp_mst_branch *mst_primary; |
5e93b820 | 510 | |
132d49d7 SV |
511 | /** |
512 | * @dpcd: Cache of DPCD for primary port. | |
513 | */ | |
ad7f8a1f | 514 | u8 dpcd[DP_RECEIVER_CAP_SIZE]; |
132d49d7 SV |
515 | /** |
516 | * @sink_count: Sink count from DEVICE_SERVICE_IRQ_VECTOR_ESI0. | |
517 | */ | |
ad7f8a1f | 518 | u8 sink_count; |
132d49d7 SV |
519 | /** |
520 | * @pbn_div: PBN to slots divisor. | |
521 | */ | |
ad7f8a1f | 522 | int pbn_div; |
a538d613 | 523 | |
3f3353b7 PD |
524 | /** |
525 | * @funcs: Atomic helper callbacks | |
526 | */ | |
527 | const struct drm_private_state_funcs *funcs; | |
528 | ||
132d49d7 | 529 | /** |
6806cdf9 SV |
530 | * @qlock: protects @tx_msg_downq, the &drm_dp_mst_branch.txslost and |
531 | * &drm_dp_sideband_msg_tx.state once they are queued | |
132d49d7 | 532 | */ |
ad7f8a1f | 533 | struct mutex qlock; |
132d49d7 SV |
534 | /** |
535 | * @tx_msg_downq: List of pending down replies. | |
536 | */ | |
ad7f8a1f | 537 | struct list_head tx_msg_downq; |
ad7f8a1f | 538 | |
132d49d7 SV |
539 | /** |
540 | * @payload_lock: Protect payload information. | |
541 | */ | |
ad7f8a1f | 542 | struct mutex payload_lock; |
132d49d7 SV |
543 | /** |
544 | * @proposed_vcpis: Array of pointers for the new VCPI allocation. The | |
6806cdf9 | 545 | * VCPI structure itself is &drm_dp_mst_port.vcpi. |
132d49d7 | 546 | */ |
ad7f8a1f | 547 | struct drm_dp_vcpi **proposed_vcpis; |
132d49d7 SV |
548 | /** |
549 | * @payloads: Array of payloads. | |
550 | */ | |
ad7f8a1f | 551 | struct drm_dp_payload *payloads; |
132d49d7 SV |
552 | /** |
553 | * @payload_mask: Elements of @payloads actually in use. Since | |
554 | * reallocation of active outputs isn't possible gaps can be created by | |
555 | * disabling outputs out of order compared to how they've been enabled. | |
556 | */ | |
ad7f8a1f | 557 | unsigned long payload_mask; |
132d49d7 SV |
558 | /** |
559 | * @vcpi_mask: Similar to @payload_mask, but for @proposed_vcpis. | |
560 | */ | |
dfda0df3 | 561 | unsigned long vcpi_mask; |
ad7f8a1f | 562 | |
132d49d7 SV |
563 | /** |
564 | * @tx_waitq: Wait to queue stall for the tx worker. | |
565 | */ | |
ad7f8a1f | 566 | wait_queue_head_t tx_waitq; |
132d49d7 SV |
567 | /** |
568 | * @work: Probe work. | |
569 | */ | |
ad7f8a1f | 570 | struct work_struct work; |
132d49d7 SV |
571 | /** |
572 | * @tx_work: Sideband transmit worker. This can nest within the main | |
573 | * @work worker for each transaction @work launches. | |
574 | */ | |
ad7f8a1f | 575 | struct work_struct tx_work; |
6b8eeca6 | 576 | |
132d49d7 SV |
577 | /** |
578 | * @destroy_connector_list: List of to be destroyed connectors. | |
579 | */ | |
6b8eeca6 | 580 | struct list_head destroy_connector_list; |
132d49d7 SV |
581 | /** |
582 | * @destroy_connector_lock: Protects @connector_list. | |
583 | */ | |
6b8eeca6 | 584 | struct mutex destroy_connector_lock; |
132d49d7 SV |
585 | /** |
586 | * @destroy_connector_work: Work item to destroy connectors. Needed to | |
587 | * avoid locking inversion. | |
588 | */ | |
6b8eeca6 | 589 | struct work_struct destroy_connector_work; |
ad7f8a1f DA |
590 | }; |
591 | ||
7b0a89a6 DP |
592 | int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, |
593 | struct drm_device *dev, struct drm_dp_aux *aux, | |
594 | int max_dpcd_transaction_bytes, | |
595 | int max_payloads, int conn_base_id); | |
ad7f8a1f DA |
596 | |
597 | void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr); | |
598 | ||
599 | ||
600 | int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state); | |
601 | ||
602 | ||
603 | int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled); | |
604 | ||
605 | ||
c6a0aed4 | 606 | 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 | 607 | |
ef8f9bea LY |
608 | bool drm_dp_mst_port_has_audio(struct drm_dp_mst_topology_mgr *mgr, |
609 | struct drm_dp_mst_port *port); | |
ad7f8a1f DA |
610 | struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); |
611 | ||
612 | ||
613 | int drm_dp_calc_pbn_mode(int clock, int bpp); | |
614 | ||
615 | ||
1e797f55 PD |
616 | bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, |
617 | struct drm_dp_mst_port *port, int pbn, int slots); | |
ad7f8a1f | 618 | |
87f5942d DA |
619 | int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); |
620 | ||
ad7f8a1f DA |
621 | |
622 | void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); | |
623 | ||
624 | ||
625 | void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, | |
626 | struct drm_dp_mst_port *port); | |
627 | ||
628 | ||
629 | int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, | |
630 | int pbn); | |
631 | ||
632 | ||
633 | int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr); | |
634 | ||
635 | ||
636 | int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr); | |
637 | ||
638 | int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr); | |
639 | ||
640 | void drm_dp_mst_dump_topology(struct seq_file *m, | |
641 | struct drm_dp_mst_topology_mgr *mgr); | |
642 | ||
643 | void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr); | |
644 | int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr); | |
3f3353b7 PD |
645 | struct drm_dp_mst_topology_state *drm_atomic_get_mst_topology_state(struct drm_atomic_state *state, |
646 | struct drm_dp_mst_topology_mgr *mgr); | |
eceae147 LP |
647 | int __must_check |
648 | drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state, | |
649 | struct drm_dp_mst_topology_mgr *mgr, | |
650 | struct drm_dp_mst_port *port, int pbn); | |
651 | int __must_check | |
652 | drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state, | |
653 | struct drm_dp_mst_topology_mgr *mgr, | |
654 | struct drm_dp_mst_port *port); | |
0bb9c2b2 DP |
655 | int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr, |
656 | struct drm_dp_mst_port *port, bool power_up); | |
eceae147 | 657 | int __must_check drm_dp_mst_atomic_check(struct drm_atomic_state *state); |
3f3353b7 | 658 | |
ebcc0e6b LP |
659 | void drm_dp_mst_get_port_malloc(struct drm_dp_mst_port *port); |
660 | void drm_dp_mst_put_port_malloc(struct drm_dp_mst_port *port); | |
661 | ||
bea5c38f LP |
662 | extern const struct drm_private_state_funcs drm_dp_mst_topology_state_funcs; |
663 | ||
664 | /** | |
665 | * __drm_dp_mst_state_iter_get - private atomic state iterator function for | |
666 | * macro-internal use | |
667 | * @state: &struct drm_atomic_state pointer | |
668 | * @mgr: pointer to the &struct drm_dp_mst_topology_mgr iteration cursor | |
669 | * @old_state: optional pointer to the old &struct drm_dp_mst_topology_state | |
670 | * iteration cursor | |
671 | * @new_state: optional pointer to the new &struct drm_dp_mst_topology_state | |
672 | * iteration cursor | |
673 | * @i: int iteration cursor, for macro-internal use | |
674 | * | |
675 | * Used by for_each_oldnew_mst_mgr_in_state(), | |
676 | * for_each_old_mst_mgr_in_state(), and for_each_new_mst_mgr_in_state(). Don't | |
677 | * call this directly. | |
678 | * | |
679 | * Returns: | |
680 | * True if the current &struct drm_private_obj is a &struct | |
681 | * drm_dp_mst_topology_mgr, false otherwise. | |
682 | */ | |
683 | static inline bool | |
684 | __drm_dp_mst_state_iter_get(struct drm_atomic_state *state, | |
685 | struct drm_dp_mst_topology_mgr **mgr, | |
686 | struct drm_dp_mst_topology_state **old_state, | |
687 | struct drm_dp_mst_topology_state **new_state, | |
688 | int i) | |
689 | { | |
690 | struct __drm_private_objs_state *objs_state = &state->private_objs[i]; | |
691 | ||
692 | if (objs_state->ptr->funcs != &drm_dp_mst_topology_state_funcs) | |
693 | return false; | |
694 | ||
695 | *mgr = to_dp_mst_topology_mgr(objs_state->ptr); | |
696 | if (old_state) | |
697 | *old_state = to_dp_mst_topology_state(objs_state->old_state); | |
698 | if (new_state) | |
699 | *new_state = to_dp_mst_topology_state(objs_state->new_state); | |
700 | ||
701 | return true; | |
702 | } | |
703 | ||
704 | /** | |
705 | * for_each_oldnew_mst_mgr_in_state - iterate over all DP MST topology | |
706 | * managers in an atomic update | |
707 | * @__state: &struct drm_atomic_state pointer | |
708 | * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor | |
709 | * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old | |
710 | * state | |
711 | * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new | |
712 | * state | |
713 | * @__i: int iteration cursor, for macro-internal use | |
714 | * | |
715 | * This iterates over all DRM DP MST topology managers in an atomic update, | |
716 | * tracking both old and new state. This is useful in places where the state | |
717 | * delta needs to be considered, for example in atomic check functions. | |
718 | */ | |
719 | #define for_each_oldnew_mst_mgr_in_state(__state, mgr, old_state, new_state, __i) \ | |
720 | for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \ | |
721 | for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), &(new_state), (__i))) | |
722 | ||
723 | /** | |
724 | * for_each_old_mst_mgr_in_state - iterate over all DP MST topology managers | |
725 | * in an atomic update | |
726 | * @__state: &struct drm_atomic_state pointer | |
727 | * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor | |
728 | * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old | |
729 | * state | |
730 | * @__i: int iteration cursor, for macro-internal use | |
731 | * | |
732 | * This iterates over all DRM DP MST topology managers in an atomic update, | |
733 | * tracking only the old state. This is useful in disable functions, where we | |
734 | * need the old state the hardware is still in. | |
735 | */ | |
736 | #define for_each_old_mst_mgr_in_state(__state, mgr, old_state, __i) \ | |
737 | for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \ | |
738 | for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), NULL, (__i))) | |
739 | ||
740 | /** | |
741 | * for_each_new_mst_mgr_in_state - iterate over all DP MST topology managers | |
742 | * in an atomic update | |
743 | * @__state: &struct drm_atomic_state pointer | |
744 | * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor | |
745 | * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new | |
746 | * state | |
747 | * @__i: int iteration cursor, for macro-internal use | |
748 | * | |
749 | * This iterates over all DRM DP MST topology managers in an atomic update, | |
750 | * tracking only the new state. This is useful in enable functions, where we | |
751 | * need the new state the hardware should be in when the atomic commit | |
752 | * operation has completed. | |
753 | */ | |
754 | #define for_each_new_mst_mgr_in_state(__state, mgr, new_state, __i) \ | |
755 | for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \ | |
756 | for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), NULL, &(new_state), (__i))) | |
757 | ||
ad7f8a1f | 758 | #endif |