1 /* Copyright 2021 Advanced Micro Devices, Inc. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a
4 * copy of this software and associated documentation files (the "Software"),
5 * to deal in the Software without restriction, including without limitation
6 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
7 * and/or sell copies of the Software, and to permit persons to whom the
8 * Software is furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
17 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
18 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
19 * OTHER DEALINGS IN THE SOFTWARE.
20 *
21 * Authors: AMD
22 *
23 */
24
25 #include "link_enc_cfg.h"
26 #include "resource.h"
27 #include "link.h"
28
29 #define DC_LOGGER dc->ctx->logger
30
31 /* Check whether stream is supported by DIG link encoders. */
is_dig_link_enc_stream(struct dc_stream_state * stream)32 static bool is_dig_link_enc_stream(struct dc_stream_state *stream)
33 {
34 bool is_dig_stream = false;
35 struct link_encoder *link_enc = NULL;
36 int i;
37
38 /* Loop over created link encoder objects. */
39 if (stream) {
40 for (i = 0; i < stream->ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) {
41 link_enc = stream->ctx->dc->res_pool->link_encoders[i];
42
43 /* Need to check link signal type rather than stream signal type which may not
44 * yet match.
45 */
46 if (link_enc && ((uint32_t)stream->link->connector_signal & link_enc->output_signals)) {
47 if (dc_is_dp_signal(stream->signal)) {
48 /* DIGs do not support DP2.0 streams with 128b/132b encoding. */
49 struct dc_link_settings link_settings = {0};
50
51 link_decide_link_settings(stream, &link_settings);
52 if ((link_settings.link_rate >= LINK_RATE_LOW) &&
53 link_settings.link_rate <= LINK_RATE_HIGH3) {
54 is_dig_stream = true;
55 break;
56 }
57 } else {
58 is_dig_stream = true;
59 break;
60 }
61 }
62 }
63 }
64 return is_dig_stream;
65 }
66
get_assignment(struct dc * dc,int i)67 static struct link_enc_assignment get_assignment(struct dc *dc, int i)
68 {
69 struct link_enc_assignment assignment;
70
71 if (dc->current_state->res_ctx.link_enc_cfg_ctx.mode == LINK_ENC_CFG_TRANSIENT)
72 assignment = dc->current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i];
73 else /* LINK_ENC_CFG_STEADY */
74 assignment = dc->current_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
75
76 return assignment;
77 }
78
79 /* Return stream using DIG link encoder resource. NULL if unused. */
get_stream_using_link_enc(struct dc_state * state,enum engine_id eng_id)80 static struct dc_stream_state *get_stream_using_link_enc(
81 struct dc_state *state,
82 enum engine_id eng_id)
83 {
84 struct dc_stream_state *stream = NULL;
85 int i;
86
87 for (i = 0; i < state->stream_count; i++) {
88 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
89
90 if ((assignment.valid == true) && (assignment.eng_id == eng_id)) {
91 stream = state->streams[i];
92 break;
93 }
94 }
95
96 return stream;
97 }
98
remove_link_enc_assignment(struct dc_state * state,struct dc_stream_state * stream,enum engine_id eng_id)99 static void remove_link_enc_assignment(
100 struct dc_state *state,
101 struct dc_stream_state *stream,
102 enum engine_id eng_id)
103 {
104 int eng_idx;
105 int i;
106
107 if (eng_id != ENGINE_ID_UNKNOWN) {
108 eng_idx = eng_id - ENGINE_ID_DIGA;
109
110 /* stream ptr of stream in dc_state used to update correct entry in
111 * link_enc_assignments table.
112 */
113 for (i = 0; i < MAX_PIPES; i++) {
114 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
115
116 if (assignment.valid && assignment.stream == stream) {
117 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid = false;
118 /* Only add link encoder back to availability pool if not being
119 * used by any other stream (i.e. removing SST stream or last MST stream).
120 */
121 if (get_stream_using_link_enc(state, eng_id) == NULL)
122 state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] = eng_id;
123
124 stream->link_enc = NULL;
125 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].eng_id = ENGINE_ID_UNKNOWN;
126 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream = NULL;
127 dc_stream_release(stream);
128 break;
129 }
130 }
131 }
132 }
133
add_link_enc_assignment(struct dc_state * state,struct dc_stream_state * stream,enum engine_id eng_id)134 static void add_link_enc_assignment(
135 struct dc_state *state,
136 struct dc_stream_state *stream,
137 enum engine_id eng_id)
138 {
139 int eng_idx;
140 int i;
141
142 if (eng_id != ENGINE_ID_UNKNOWN) {
143 eng_idx = eng_id - ENGINE_ID_DIGA;
144
145 /* stream ptr of stream in dc_state used to update correct entry in
146 * link_enc_assignments table.
147 */
148 for (i = 0; i < state->stream_count; i++) {
149 if (stream == state->streams[i]) {
150 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i] = (struct link_enc_assignment){
151 .valid = true,
152 .ep_id = (struct display_endpoint_id) {
153 .link_id = stream->link->link_id,
154 .ep_type = stream->link->ep_type},
155 .eng_id = eng_id,
156 .stream = stream};
157 dc_stream_retain(stream);
158 state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] = ENGINE_ID_UNKNOWN;
159 stream->link_enc = stream->ctx->dc->res_pool->link_encoders[eng_idx];
160 break;
161 }
162 }
163
164 /* Attempted to add an encoder assignment for a stream not in dc_state. */
165 ASSERT(i != state->stream_count);
166 }
167 }
168
169 /* Return first available DIG link encoder. */
find_first_avail_link_enc(const struct dc_context * ctx,const struct dc_state * state)170 static enum engine_id find_first_avail_link_enc(
171 const struct dc_context *ctx,
172 const struct dc_state *state)
173 {
174 enum engine_id eng_id = ENGINE_ID_UNKNOWN;
175 int i;
176
177 for (i = 0; i < ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) {
178 eng_id = state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i];
179 if (eng_id != ENGINE_ID_UNKNOWN)
180 break;
181 }
182
183 return eng_id;
184 }
185
186 /* Check for availability of link encoder eng_id. */
is_avail_link_enc(struct dc_state * state,enum engine_id eng_id,struct dc_stream_state * stream)187 static bool is_avail_link_enc(struct dc_state *state, enum engine_id eng_id, struct dc_stream_state *stream)
188 {
189 bool is_avail = false;
190 int eng_idx = eng_id - ENGINE_ID_DIGA;
191
192 /* An encoder is available if it is still in the availability pool. */
193 if (eng_id != ENGINE_ID_UNKNOWN && state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] != ENGINE_ID_UNKNOWN) {
194 is_avail = true;
195 } else {
196 struct dc_stream_state *stream_assigned = NULL;
197
198 /* MST streams share the same link and should share the same encoder.
199 * If a stream that has already been assigned a link encoder uses as the
200 * same link as the stream checking for availability, it is an MST stream
201 * and should use the same link encoder.
202 */
203 stream_assigned = get_stream_using_link_enc(state, eng_id);
204 if (stream_assigned && stream != stream_assigned && stream->link == stream_assigned->link)
205 is_avail = true;
206 }
207
208 return is_avail;
209 }
210
211 /* Test for display_endpoint_id equality. */
are_ep_ids_equal(struct display_endpoint_id * lhs,struct display_endpoint_id * rhs)212 static bool are_ep_ids_equal(struct display_endpoint_id *lhs, struct display_endpoint_id *rhs)
213 {
214 bool are_equal = false;
215
216 if (lhs->link_id.id == rhs->link_id.id &&
217 lhs->link_id.enum_id == rhs->link_id.enum_id &&
218 lhs->link_id.type == rhs->link_id.type &&
219 lhs->ep_type == rhs->ep_type)
220 are_equal = true;
221
222 return are_equal;
223 }
224
get_link_enc_used_by_link(struct dc_state * state,const struct dc_link * link)225 static struct link_encoder *get_link_enc_used_by_link(
226 struct dc_state *state,
227 const struct dc_link *link)
228 {
229 struct link_encoder *link_enc = NULL;
230 struct display_endpoint_id ep_id;
231 int i;
232
233 ep_id = (struct display_endpoint_id) {
234 .link_id = link->link_id,
235 .ep_type = link->ep_type};
236
237 for (i = 0; i < MAX_PIPES; i++) {
238 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
239
240 if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id))
241 link_enc = link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA];
242 }
243
244 return link_enc;
245 }
246 /* Clear all link encoder assignments. */
clear_enc_assignments(const struct dc * dc,struct dc_state * state)247 static void clear_enc_assignments(const struct dc *dc, struct dc_state *state)
248 {
249 int i;
250
251 for (i = 0; i < MAX_PIPES; i++) {
252 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid = false;
253 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].eng_id = ENGINE_ID_UNKNOWN;
254 if (state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream != NULL) {
255 dc_stream_release(state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream);
256 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream = NULL;
257 }
258 }
259
260 for (i = 0; i < dc->res_pool->res_cap->num_dig_link_enc; i++) {
261 if (dc->res_pool->link_encoders[i])
262 state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i] = (enum engine_id) i;
263 else
264 state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i] = ENGINE_ID_UNKNOWN;
265 }
266 }
267
link_enc_cfg_init(const struct dc * dc,struct dc_state * state)268 void link_enc_cfg_init(
269 const struct dc *dc,
270 struct dc_state *state)
271 {
272 clear_enc_assignments(dc, state);
273
274 state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_STEADY;
275 }
276
link_enc_cfg_copy(const struct dc_state * src_ctx,struct dc_state * dst_ctx)277 void link_enc_cfg_copy(const struct dc_state *src_ctx, struct dc_state *dst_ctx)
278 {
279 memcpy(&dst_ctx->res_ctx.link_enc_cfg_ctx,
280 &src_ctx->res_ctx.link_enc_cfg_ctx,
281 sizeof(dst_ctx->res_ctx.link_enc_cfg_ctx));
282 }
283
link_enc_cfg_link_encs_assign(struct dc * dc,struct dc_state * state,struct dc_stream_state * streams[],uint8_t stream_count)284 void link_enc_cfg_link_encs_assign(
285 struct dc *dc,
286 struct dc_state *state,
287 struct dc_stream_state *streams[],
288 uint8_t stream_count)
289 {
290 enum engine_id eng_id = ENGINE_ID_UNKNOWN;
291 int i;
292 int j;
293
294 ASSERT(state->stream_count == stream_count);
295 ASSERT(dc->current_state->res_ctx.link_enc_cfg_ctx.mode == LINK_ENC_CFG_STEADY);
296
297 /* Release DIG link encoder resources before running assignment algorithm. */
298 for (i = 0; i < dc->current_state->stream_count; i++)
299 dc->res_pool->funcs->link_enc_unassign(state, dc->current_state->streams[i]);
300
301 for (i = 0; i < MAX_PIPES; i++)
302 ASSERT(state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid == false);
303
304 /* (a) Assign DIG link encoders to physical (unmappable) endpoints first. */
305 for (i = 0; i < stream_count; i++) {
306 struct dc_stream_state *stream = streams[i];
307
308 /* skip it if the link is mappable endpoint. */
309 if (stream->link->is_dig_mapping_flexible)
310 continue;
311
312 /* Skip stream if not supported by DIG link encoder. */
313 if (!is_dig_link_enc_stream(stream))
314 continue;
315
316 /* Physical endpoints have a fixed mapping to DIG link encoders. */
317 eng_id = stream->link->eng_id;
318 add_link_enc_assignment(state, stream, eng_id);
319 }
320
321 /* (b) Retain previous assignments for mappable endpoints if encoders still available. */
322 eng_id = ENGINE_ID_UNKNOWN;
323
324 if (state != dc->current_state) {
325 struct dc_state *prev_state = dc->current_state;
326
327 for (i = 0; i < stream_count; i++) {
328 struct dc_stream_state *stream = state->streams[i];
329
330 /* Skip it if the link is NOT mappable endpoint. */
331 if (!stream->link->is_dig_mapping_flexible)
332 continue;
333
334 /* Skip stream if not supported by DIG link encoder. */
335 if (!is_dig_link_enc_stream(stream))
336 continue;
337
338 for (j = 0; j < prev_state->stream_count; j++) {
339 struct dc_stream_state *prev_stream = prev_state->streams[j];
340
341 if (stream == prev_stream && stream->link == prev_stream->link &&
342 prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].valid) {
343 eng_id = prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].eng_id;
344
345 if (is_avail_link_enc(state, eng_id, stream))
346 add_link_enc_assignment(state, stream, eng_id);
347 }
348 }
349 }
350 }
351
352 /* (c) Then assign encoders to remaining mappable endpoints. */
353 eng_id = ENGINE_ID_UNKNOWN;
354
355 for (i = 0; i < stream_count; i++) {
356 struct dc_stream_state *stream = streams[i];
357 struct link_encoder *link_enc = NULL;
358
359 /* Skip it if the link is NOT mappable endpoint. */
360 if (!stream->link->is_dig_mapping_flexible)
361 continue;
362
363 /* Skip if encoder assignment retained in step (b) above. */
364 if (stream->link_enc)
365 continue;
366
367 /* Skip stream if not supported by DIG link encoder. */
368 if (!is_dig_link_enc_stream(stream)) {
369 ASSERT(stream->link->is_dig_mapping_flexible != true);
370 continue;
371 }
372
373 /* Mappable endpoints have a flexible mapping to DIG link encoders. */
374
375 /* For MST, multiple streams will share the same link / display
376 * endpoint. These streams should use the same link encoder
377 * assigned to that endpoint.
378 */
379 link_enc = get_link_enc_used_by_link(state, stream->link);
380 if (link_enc == NULL)
381 eng_id = find_first_avail_link_enc(stream->ctx, state);
382 else
383 eng_id = link_enc->preferred_engine;
384
385 add_link_enc_assignment(state, stream, eng_id);
386 }
387
388 link_enc_cfg_validate(dc, state);
389
390 /* Update transient assignments. */
391 for (i = 0; i < MAX_PIPES; i++) {
392 dc->current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i] =
393 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
394 }
395
396 /* Log encoder assignments. */
397 for (i = 0; i < MAX_PIPES; i++) {
398 struct link_enc_assignment assignment =
399 dc->current_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
400
401 if (assignment.valid)
402 DC_LOG_DEBUG("%s: CUR %s(%d) - enc_id(%d)\n",
403 __func__,
404 assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? "PHY" : "DPIA",
405 assignment.ep_id.link_id.enum_id - 1,
406 assignment.eng_id);
407 }
408 for (i = 0; i < MAX_PIPES; i++) {
409 struct link_enc_assignment assignment =
410 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
411
412 if (assignment.valid)
413 DC_LOG_DEBUG("%s: NEW %s(%d) - enc_id(%d)\n",
414 __func__,
415 assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? "PHY" : "DPIA",
416 assignment.ep_id.link_id.enum_id - 1,
417 assignment.eng_id);
418 }
419
420 /* Current state mode will be set to steady once this state committed. */
421 state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_STEADY;
422 }
423
link_enc_cfg_link_enc_unassign(struct dc_state * state,struct dc_stream_state * stream)424 void link_enc_cfg_link_enc_unassign(
425 struct dc_state *state,
426 struct dc_stream_state *stream)
427 {
428 enum engine_id eng_id = ENGINE_ID_UNKNOWN;
429
430 if (stream->link_enc)
431 eng_id = stream->link_enc->preferred_engine;
432
433 remove_link_enc_assignment(state, stream, eng_id);
434 }
435
link_enc_cfg_is_transmitter_mappable(struct dc * dc,struct link_encoder * link_enc)436 bool link_enc_cfg_is_transmitter_mappable(
437 struct dc *dc,
438 struct link_encoder *link_enc)
439 {
440 bool is_mappable = false;
441 enum engine_id eng_id = link_enc->preferred_engine;
442 struct dc_stream_state *stream = link_enc_cfg_get_stream_using_link_enc(dc, eng_id);
443
444 if (stream)
445 is_mappable = stream->link->is_dig_mapping_flexible;
446
447 return is_mappable;
448 }
449
link_enc_cfg_get_stream_using_link_enc(struct dc * dc,enum engine_id eng_id)450 struct dc_stream_state *link_enc_cfg_get_stream_using_link_enc(
451 struct dc *dc,
452 enum engine_id eng_id)
453 {
454 struct dc_stream_state *stream = NULL;
455 int i;
456
457 for (i = 0; i < MAX_PIPES; i++) {
458 struct link_enc_assignment assignment = get_assignment(dc, i);
459
460 if ((assignment.valid == true) && (assignment.eng_id == eng_id)) {
461 stream = assignment.stream;
462 break;
463 }
464 }
465
466 return stream;
467 }
468
link_enc_cfg_get_link_using_link_enc(struct dc * dc,enum engine_id eng_id)469 struct dc_link *link_enc_cfg_get_link_using_link_enc(
470 struct dc *dc,
471 enum engine_id eng_id)
472 {
473 struct dc_link *link = NULL;
474 struct dc_stream_state *stream = NULL;
475
476 stream = link_enc_cfg_get_stream_using_link_enc(dc, eng_id);
477
478 if (stream)
479 link = stream->link;
480
481 // dm_output_to_console("%s: No link using DIG(%d).\n", __func__, eng_id);
482 return link;
483 }
484
link_enc_cfg_get_link_enc_used_by_link(struct dc * dc,const struct dc_link * link)485 struct link_encoder *link_enc_cfg_get_link_enc_used_by_link(
486 struct dc *dc,
487 const struct dc_link *link)
488 {
489 struct link_encoder *link_enc = NULL;
490 struct display_endpoint_id ep_id;
491 int i;
492
493 ep_id = (struct display_endpoint_id) {
494 .link_id = link->link_id,
495 .ep_type = link->ep_type};
496
497 for (i = 0; i < MAX_PIPES; i++) {
498 struct link_enc_assignment assignment = get_assignment(dc, i);
499
500 if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id)) {
501 link_enc = link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA];
502 break;
503 }
504 }
505
506 return link_enc;
507 }
508
link_enc_cfg_get_next_avail_link_enc(struct dc * dc)509 struct link_encoder *link_enc_cfg_get_next_avail_link_enc(struct dc *dc)
510 {
511 struct link_encoder *link_enc = NULL;
512 enum engine_id encs_assigned[MAX_DIG_LINK_ENCODERS];
513 int i;
514
515 for (i = 0; i < MAX_DIG_LINK_ENCODERS; i++)
516 encs_assigned[i] = ENGINE_ID_UNKNOWN;
517
518 /* Add assigned encoders to list. */
519 for (i = 0; i < MAX_PIPES; i++) {
520 struct link_enc_assignment assignment = get_assignment(dc, i);
521
522 if (assignment.valid)
523 encs_assigned[assignment.eng_id - ENGINE_ID_DIGA] = assignment.eng_id;
524 }
525
526 for (i = 0; i < dc->res_pool->res_cap->num_dig_link_enc; i++) {
527 if (encs_assigned[i] == ENGINE_ID_UNKNOWN &&
528 dc->res_pool->link_encoders[i] != NULL) {
529 link_enc = dc->res_pool->link_encoders[i];
530 break;
531 }
532 }
533
534 return link_enc;
535 }
536
link_enc_cfg_get_link_enc_used_by_stream(struct dc * dc,const struct dc_stream_state * stream)537 struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream(
538 struct dc *dc,
539 const struct dc_stream_state *stream)
540 {
541 struct link_encoder *link_enc;
542
543 link_enc = link_enc_cfg_get_link_enc_used_by_link(dc, stream->link);
544
545 return link_enc;
546 }
547
link_enc_cfg_get_link_enc(const struct dc_link * link)548 struct link_encoder *link_enc_cfg_get_link_enc(
549 const struct dc_link *link)
550 {
551 struct link_encoder *link_enc = NULL;
552
553 /* Links supporting dynamically assigned link encoder will be assigned next
554 * available encoder if one not already assigned.
555 */
556 if (link->is_dig_mapping_flexible &&
557 link->dc->res_pool->funcs->link_encs_assign) {
558 link_enc = link_enc_cfg_get_link_enc_used_by_link(link->ctx->dc, link);
559 if (link_enc == NULL)
560 link_enc = link_enc_cfg_get_next_avail_link_enc(
561 link->ctx->dc);
562 } else
563 link_enc = link->link_enc;
564
565 return link_enc;
566 }
567
link_enc_cfg_get_link_enc_used_by_stream_current(struct dc * dc,const struct dc_stream_state * stream)568 struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream_current(
569 struct dc *dc,
570 const struct dc_stream_state *stream)
571 {
572 struct link_encoder *link_enc = NULL;
573 struct display_endpoint_id ep_id;
574 int i;
575
576 ep_id = (struct display_endpoint_id) {
577 .link_id = stream->link->link_id,
578 .ep_type = stream->link->ep_type};
579
580 for (i = 0; i < MAX_PIPES; i++) {
581 struct link_enc_assignment assignment =
582 dc->current_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
583
584 if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id)) {
585 link_enc = stream->link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA];
586 break;
587 }
588 }
589
590 return link_enc;
591 }
592
link_enc_cfg_is_link_enc_avail(struct dc * dc,enum engine_id eng_id,struct dc_link * link)593 bool link_enc_cfg_is_link_enc_avail(struct dc *dc, enum engine_id eng_id, struct dc_link *link)
594 {
595 bool is_avail = true;
596 int i;
597
598 /* An encoder is not available if it has already been assigned to a different endpoint. */
599 for (i = 0; i < MAX_PIPES; i++) {
600 struct link_enc_assignment assignment = get_assignment(dc, i);
601 struct display_endpoint_id ep_id = (struct display_endpoint_id) {
602 .link_id = link->link_id,
603 .ep_type = link->ep_type};
604
605 if (assignment.valid && assignment.eng_id == eng_id && !are_ep_ids_equal(&ep_id, &assignment.ep_id)) {
606 is_avail = false;
607 break;
608 }
609 }
610
611 return is_avail;
612 }
613
link_enc_cfg_validate(struct dc * dc,struct dc_state * state)614 bool link_enc_cfg_validate(struct dc *dc, struct dc_state *state)
615 {
616 bool is_valid = false;
617 bool valid_entries = true;
618 bool valid_stream_ptrs = true;
619 bool valid_uniqueness = true;
620 bool valid_avail = true;
621 bool valid_streams = true;
622 int i, j;
623 uint8_t valid_count = 0;
624 uint8_t dig_stream_count = 0;
625 int matching_stream_ptrs = 0;
626 int eng_ids_per_ep_id[MAX_PIPES] = {0};
627 int ep_ids_per_eng_id[MAX_PIPES] = {0};
628 int valid_bitmap = 0;
629
630 /* (1) No. valid entries same as stream count. */
631 for (i = 0; i < MAX_PIPES; i++) {
632 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
633
634 if (assignment.valid)
635 valid_count++;
636
637 if (is_dig_link_enc_stream(state->streams[i]))
638 dig_stream_count++;
639 }
640 if (valid_count != dig_stream_count)
641 valid_entries = false;
642
643 /* (2) Matching stream ptrs. */
644 for (i = 0; i < MAX_PIPES; i++) {
645 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
646
647 if (assignment.valid) {
648 if (assignment.stream == state->streams[i])
649 matching_stream_ptrs++;
650 else
651 valid_stream_ptrs = false;
652 }
653 }
654
655 /* (3) Each endpoint assigned unique encoder. */
656 for (i = 0; i < MAX_PIPES; i++) {
657 struct link_enc_assignment assignment_i = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
658
659 if (assignment_i.valid) {
660 struct display_endpoint_id ep_id_i = assignment_i.ep_id;
661
662 eng_ids_per_ep_id[i]++;
663 ep_ids_per_eng_id[i]++;
664 for (j = 0; j < MAX_PIPES; j++) {
665 struct link_enc_assignment assignment_j =
666 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j];
667
668 if (j == i)
669 continue;
670
671 if (assignment_j.valid) {
672 struct display_endpoint_id ep_id_j = assignment_j.ep_id;
673
674 if (are_ep_ids_equal(&ep_id_i, &ep_id_j) &&
675 assignment_i.eng_id != assignment_j.eng_id) {
676 valid_uniqueness = false;
677 eng_ids_per_ep_id[i]++;
678 } else if (!are_ep_ids_equal(&ep_id_i, &ep_id_j) &&
679 assignment_i.eng_id == assignment_j.eng_id) {
680 valid_uniqueness = false;
681 ep_ids_per_eng_id[i]++;
682 }
683 }
684 }
685 }
686 }
687
688 /* (4) Assigned encoders not in available pool. */
689 for (i = 0; i < MAX_PIPES; i++) {
690 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
691
692 if (assignment.valid) {
693 for (j = 0; j < dc->res_pool->res_cap->num_dig_link_enc; j++) {
694 if (state->res_ctx.link_enc_cfg_ctx.link_enc_avail[j] == assignment.eng_id) {
695 valid_avail = false;
696 break;
697 }
698 }
699 }
700 }
701
702 /* (5) All streams have valid link encoders. */
703 for (i = 0; i < state->stream_count; i++) {
704 struct dc_stream_state *stream = state->streams[i];
705
706 if (is_dig_link_enc_stream(stream) && stream->link_enc == NULL) {
707 valid_streams = false;
708 break;
709 }
710 }
711
712 is_valid = valid_entries && valid_stream_ptrs && valid_uniqueness && valid_avail && valid_streams;
713 ASSERT(is_valid);
714
715 if (is_valid == false) {
716 valid_bitmap =
717 (valid_entries & 0x1) |
718 ((valid_stream_ptrs & 0x1) << 1) |
719 ((valid_uniqueness & 0x1) << 2) |
720 ((valid_avail & 0x1) << 3) |
721 ((valid_streams & 0x1) << 4);
722 DC_LOG_ERROR("%s: Invalid link encoder assignments - 0x%x\n", __func__, valid_bitmap);
723 }
724
725 return is_valid;
726 }
727
link_enc_cfg_set_transient_mode(struct dc * dc,struct dc_state * current_state,struct dc_state * new_state)728 void link_enc_cfg_set_transient_mode(struct dc *dc, struct dc_state *current_state, struct dc_state *new_state)
729 {
730 int i = 0;
731 int num_transient_assignments = 0;
732
733 for (i = 0; i < MAX_PIPES; i++) {
734 if (current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i].valid)
735 num_transient_assignments++;
736 }
737
738 /* Only enter transient mode if the new encoder assignments are valid. */
739 if (new_state->stream_count == num_transient_assignments) {
740 current_state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_TRANSIENT;
741 DC_LOG_DEBUG("%s: current_state(%p) mode(%d)\n", __func__, current_state, LINK_ENC_CFG_TRANSIENT);
742 }
743 }
744