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