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 stream->link_enc = NULL;
122 break;
123 }
124 }
125 }
126 }
127
add_link_enc_assignment(struct dc_state * state,struct dc_stream_state * stream,enum engine_id eng_id)128 static void add_link_enc_assignment(
129 struct dc_state *state,
130 struct dc_stream_state *stream,
131 enum engine_id eng_id)
132 {
133 int eng_idx;
134 int i;
135
136 if (eng_id != ENGINE_ID_UNKNOWN) {
137 eng_idx = eng_id - ENGINE_ID_DIGA;
138
139 /* stream ptr of stream in dc_state used to update correct entry in
140 * link_enc_assignments table.
141 */
142 for (i = 0; i < state->stream_count; i++) {
143 if (stream == state->streams[i]) {
144 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i] = (struct link_enc_assignment){
145 .valid = true,
146 .ep_id = (struct display_endpoint_id) {
147 .link_id = stream->link->link_id,
148 .ep_type = stream->link->ep_type},
149 .eng_id = eng_id,
150 .stream = stream};
151 state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] = ENGINE_ID_UNKNOWN;
152 stream->link_enc = stream->ctx->dc->res_pool->link_encoders[eng_idx];
153 break;
154 }
155 }
156
157 /* Attempted to add an encoder assignment for a stream not in dc_state. */
158 ASSERT(i != state->stream_count);
159 }
160 }
161
162 /* Return first available DIG link encoder. */
find_first_avail_link_enc(const struct dc_context * ctx,const struct dc_state * state)163 static enum engine_id find_first_avail_link_enc(
164 const struct dc_context *ctx,
165 const struct dc_state *state)
166 {
167 enum engine_id eng_id = ENGINE_ID_UNKNOWN;
168 int i;
169
170 for (i = 0; i < ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) {
171 eng_id = state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i];
172 if (eng_id != ENGINE_ID_UNKNOWN)
173 break;
174 }
175
176 return eng_id;
177 }
178
179 /* 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)180 static bool is_avail_link_enc(struct dc_state *state, enum engine_id eng_id, struct dc_stream_state *stream)
181 {
182 bool is_avail = false;
183 int eng_idx = eng_id - ENGINE_ID_DIGA;
184
185 /* An encoder is available if it is still in the availability pool. */
186 if (eng_id != ENGINE_ID_UNKNOWN && state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] != ENGINE_ID_UNKNOWN) {
187 is_avail = true;
188 } else {
189 struct dc_stream_state *stream_assigned = NULL;
190
191 /* MST streams share the same link and should share the same encoder.
192 * If a stream that has already been assigned a link encoder uses as the
193 * same link as the stream checking for availability, it is an MST stream
194 * and should use the same link encoder.
195 */
196 stream_assigned = get_stream_using_link_enc(state, eng_id);
197 if (stream_assigned && stream != stream_assigned && stream->link == stream_assigned->link)
198 is_avail = true;
199 }
200
201 return is_avail;
202 }
203
204 /* Test for display_endpoint_id equality. */
are_ep_ids_equal(struct display_endpoint_id * lhs,struct display_endpoint_id * rhs)205 static bool are_ep_ids_equal(struct display_endpoint_id *lhs, struct display_endpoint_id *rhs)
206 {
207 bool are_equal = false;
208
209 if (lhs->link_id.id == rhs->link_id.id &&
210 lhs->link_id.enum_id == rhs->link_id.enum_id &&
211 lhs->link_id.type == rhs->link_id.type &&
212 lhs->ep_type == rhs->ep_type)
213 are_equal = true;
214
215 return are_equal;
216 }
217
get_link_enc_used_by_link(struct dc_state * state,const struct dc_link * link)218 static struct link_encoder *get_link_enc_used_by_link(
219 struct dc_state *state,
220 const struct dc_link *link)
221 {
222 struct link_encoder *link_enc = NULL;
223 struct display_endpoint_id ep_id;
224 int i;
225
226 ep_id = (struct display_endpoint_id) {
227 .link_id = link->link_id,
228 .ep_type = link->ep_type};
229
230 for (i = 0; i < state->stream_count; i++) {
231 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
232
233 if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id))
234 link_enc = link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA];
235 }
236
237 return link_enc;
238 }
239 /* Clear all link encoder assignments. */
clear_enc_assignments(struct dc_state * state)240 static void clear_enc_assignments(struct dc_state *state)
241 {
242 int i;
243 enum engine_id eng_id;
244 struct dc_stream_state *stream;
245
246 for (i = 0; i < MAX_PIPES; i++) {
247 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid = false;
248 eng_id = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].eng_id;
249 stream = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream;
250 if (eng_id != ENGINE_ID_UNKNOWN)
251 state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_id - ENGINE_ID_DIGA] = eng_id;
252 if (stream)
253 stream->link_enc = NULL;
254 }
255 }
256
link_enc_cfg_init(struct dc * dc,struct dc_state * state)257 void link_enc_cfg_init(
258 struct dc *dc,
259 struct dc_state *state)
260 {
261 int i;
262
263 for (i = 0; i < dc->res_pool->res_cap->num_dig_link_enc; i++) {
264 if (dc->res_pool->link_encoders[i])
265 state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i] = (enum engine_id) i;
266 else
267 state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i] = ENGINE_ID_UNKNOWN;
268 }
269
270 clear_enc_assignments(state);
271
272 state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_STEADY;
273 }
274
link_enc_cfg_link_encs_assign(struct dc * dc,struct dc_state * state,struct dc_stream_state * streams[],uint8_t stream_count)275 void link_enc_cfg_link_encs_assign(
276 struct dc *dc,
277 struct dc_state *state,
278 struct dc_stream_state *streams[],
279 uint8_t stream_count)
280 {
281 enum engine_id eng_id = ENGINE_ID_UNKNOWN;
282 int i;
283 int j;
284
285 ASSERT(state->stream_count == stream_count);
286
287 if (stream_count == 0)
288 clear_enc_assignments(state);
289
290 /* Release DIG link encoder resources before running assignment algorithm. */
291 for (i = 0; i < stream_count; i++)
292 dc->res_pool->funcs->link_enc_unassign(state, streams[i]);
293
294 for (i = 0; i < MAX_PIPES; i++)
295 ASSERT(state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid == false);
296
297 /* (a) Assign DIG link encoders to physical (unmappable) endpoints first. */
298 for (i = 0; i < stream_count; i++) {
299 struct dc_stream_state *stream = streams[i];
300
301 /* Skip stream if not supported by DIG link encoder. */
302 if (!is_dig_link_enc_stream(stream))
303 continue;
304
305 /* Physical endpoints have a fixed mapping to DIG link encoders. */
306 if (!stream->link->is_dig_mapping_flexible) {
307 eng_id = stream->link->eng_id;
308 add_link_enc_assignment(state, stream, eng_id);
309 }
310 }
311
312 /* (b) Retain previous assignments for mappable endpoints if encoders still available. */
313 eng_id = ENGINE_ID_UNKNOWN;
314
315 if (state != dc->current_state) {
316 struct dc_state *prev_state = dc->current_state;
317
318 for (i = 0; i < stream_count; i++) {
319 struct dc_stream_state *stream = state->streams[i];
320
321 /* Skip stream if not supported by DIG link encoder. */
322 if (!is_dig_link_enc_stream(stream))
323 continue;
324
325 if (!stream->link->is_dig_mapping_flexible)
326 continue;
327
328 for (j = 0; j < prev_state->stream_count; j++) {
329 struct dc_stream_state *prev_stream = prev_state->streams[j];
330
331 if (stream == prev_stream && stream->link == prev_stream->link &&
332 prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].valid) {
333 eng_id = prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].eng_id;
334 if (is_avail_link_enc(state, eng_id, stream))
335 add_link_enc_assignment(state, stream, eng_id);
336 }
337 }
338 }
339 }
340
341 /* (c) Then assign encoders to remaining mappable endpoints. */
342 eng_id = ENGINE_ID_UNKNOWN;
343
344 for (i = 0; i < stream_count; i++) {
345 struct dc_stream_state *stream = streams[i];
346
347 /* Skip stream if not supported by DIG link encoder. */
348 if (!is_dig_link_enc_stream(stream)) {
349 ASSERT(stream->link->is_dig_mapping_flexible != true);
350 continue;
351 }
352
353 /* Mappable endpoints have a flexible mapping to DIG link encoders. */
354 if (stream->link->is_dig_mapping_flexible) {
355 struct link_encoder *link_enc = NULL;
356
357 /* Skip if encoder assignment retained in step (b) above. */
358 if (stream->link_enc)
359 continue;
360
361 /* For MST, multiple streams will share the same link / display
362 * endpoint. These streams should use the same link encoder
363 * assigned to that endpoint.
364 */
365 link_enc = get_link_enc_used_by_link(state, stream->link);
366 if (link_enc == NULL)
367 eng_id = find_first_avail_link_enc(stream->ctx, state);
368 else
369 eng_id = link_enc->preferred_engine;
370 add_link_enc_assignment(state, stream, eng_id);
371 }
372 }
373
374 link_enc_cfg_validate(dc, state);
375
376 /* Update transient assignments. */
377 for (i = 0; i < MAX_PIPES; i++) {
378 dc->current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i] =
379 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
380 }
381
382 /* Current state mode will be set to steady once this state committed. */
383 state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_STEADY;
384 }
385
link_enc_cfg_link_enc_unassign(struct dc_state * state,struct dc_stream_state * stream)386 void link_enc_cfg_link_enc_unassign(
387 struct dc_state *state,
388 struct dc_stream_state *stream)
389 {
390 enum engine_id eng_id = ENGINE_ID_UNKNOWN;
391
392 /* Only DIG link encoders. */
393 if (!is_dig_link_enc_stream(stream))
394 return;
395
396 if (stream->link_enc)
397 eng_id = stream->link_enc->preferred_engine;
398
399 remove_link_enc_assignment(state, stream, eng_id);
400 }
401
link_enc_cfg_is_transmitter_mappable(struct dc * dc,struct link_encoder * link_enc)402 bool link_enc_cfg_is_transmitter_mappable(
403 struct dc *dc,
404 struct link_encoder *link_enc)
405 {
406 bool is_mappable = false;
407 enum engine_id eng_id = link_enc->preferred_engine;
408 struct dc_stream_state *stream = link_enc_cfg_get_stream_using_link_enc(dc, eng_id);
409
410 if (stream)
411 is_mappable = stream->link->is_dig_mapping_flexible;
412
413 return is_mappable;
414 }
415
link_enc_cfg_get_stream_using_link_enc(struct dc * dc,enum engine_id eng_id)416 struct dc_stream_state *link_enc_cfg_get_stream_using_link_enc(
417 struct dc *dc,
418 enum engine_id eng_id)
419 {
420 struct dc_stream_state *stream = NULL;
421 int i;
422
423 for (i = 0; i < MAX_PIPES; i++) {
424 struct link_enc_assignment assignment = get_assignment(dc, i);
425
426 if ((assignment.valid == true) && (assignment.eng_id == eng_id)) {
427 stream = assignment.stream;
428 break;
429 }
430 }
431
432 return stream;
433 }
434
link_enc_cfg_get_link_using_link_enc(struct dc * dc,enum engine_id eng_id)435 struct dc_link *link_enc_cfg_get_link_using_link_enc(
436 struct dc *dc,
437 enum engine_id eng_id)
438 {
439 struct dc_link *link = NULL;
440 struct dc_stream_state *stream = NULL;
441
442 stream = link_enc_cfg_get_stream_using_link_enc(dc, eng_id);
443
444 if (stream)
445 link = stream->link;
446
447 // dm_output_to_console("%s: No link using DIG(%d).\n", __func__, eng_id);
448 return link;
449 }
450
link_enc_cfg_get_link_enc_used_by_link(struct dc * dc,const struct dc_link * link)451 struct link_encoder *link_enc_cfg_get_link_enc_used_by_link(
452 struct dc *dc,
453 const struct dc_link *link)
454 {
455 struct link_encoder *link_enc = NULL;
456 struct display_endpoint_id ep_id;
457 int i;
458
459 ep_id = (struct display_endpoint_id) {
460 .link_id = link->link_id,
461 .ep_type = link->ep_type};
462
463 for (i = 0; i < MAX_PIPES; i++) {
464 struct link_enc_assignment assignment = get_assignment(dc, i);
465
466 if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id)) {
467 link_enc = link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA];
468 break;
469 }
470 }
471
472 return link_enc;
473 }
474
link_enc_cfg_get_next_avail_link_enc(struct dc * dc)475 struct link_encoder *link_enc_cfg_get_next_avail_link_enc(struct dc *dc)
476 {
477 struct link_encoder *link_enc = NULL;
478 enum engine_id encs_assigned[MAX_DIG_LINK_ENCODERS];
479 int i;
480
481 for (i = 0; i < MAX_DIG_LINK_ENCODERS; i++)
482 encs_assigned[i] = ENGINE_ID_UNKNOWN;
483
484 /* Add assigned encoders to list. */
485 for (i = 0; i < MAX_PIPES; i++) {
486 struct link_enc_assignment assignment = get_assignment(dc, i);
487
488 if (assignment.valid)
489 encs_assigned[assignment.eng_id - ENGINE_ID_DIGA] = assignment.eng_id;
490 }
491
492 for (i = 0; i < dc->res_pool->res_cap->num_dig_link_enc; i++) {
493 if (encs_assigned[i] == ENGINE_ID_UNKNOWN) {
494 link_enc = dc->res_pool->link_encoders[i];
495 break;
496 }
497 }
498
499 return link_enc;
500 }
501
link_enc_cfg_get_link_enc_used_by_stream(struct dc * dc,const struct dc_stream_state * stream)502 struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream(
503 struct dc *dc,
504 const struct dc_stream_state *stream)
505 {
506 struct link_encoder *link_enc;
507
508 link_enc = link_enc_cfg_get_link_enc_used_by_link(dc, stream->link);
509
510 return link_enc;
511 }
512
link_enc_cfg_is_link_enc_avail(struct dc * dc,enum engine_id eng_id,struct dc_link * link)513 bool link_enc_cfg_is_link_enc_avail(struct dc *dc, enum engine_id eng_id, struct dc_link *link)
514 {
515 bool is_avail = true;
516 int i;
517
518 /* An encoder is not available if it has already been assigned to a different endpoint. */
519 for (i = 0; i < MAX_PIPES; i++) {
520 struct link_enc_assignment assignment = get_assignment(dc, i);
521 struct display_endpoint_id ep_id = (struct display_endpoint_id) {
522 .link_id = link->link_id,
523 .ep_type = link->ep_type};
524
525 if (assignment.valid && assignment.eng_id == eng_id && !are_ep_ids_equal(&ep_id, &assignment.ep_id)) {
526 is_avail = false;
527 break;
528 }
529 }
530
531 return is_avail;
532 }
533
link_enc_cfg_validate(struct dc * dc,struct dc_state * state)534 bool link_enc_cfg_validate(struct dc *dc, struct dc_state *state)
535 {
536 bool is_valid = false;
537 bool valid_entries = true;
538 bool valid_stream_ptrs = true;
539 bool valid_uniqueness = true;
540 bool valid_avail = true;
541 bool valid_streams = true;
542 int i, j;
543 uint8_t valid_count = 0;
544 uint8_t dig_stream_count = 0;
545 int matching_stream_ptrs = 0;
546 int eng_ids_per_ep_id[MAX_PIPES] = {0};
547
548 /* (1) No. valid entries same as stream count. */
549 for (i = 0; i < MAX_PIPES; i++) {
550 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
551
552 if (assignment.valid)
553 valid_count++;
554
555 if (is_dig_link_enc_stream(state->streams[i]))
556 dig_stream_count++;
557 }
558 if (valid_count != dig_stream_count)
559 valid_entries = false;
560
561 /* (2) Matching stream ptrs. */
562 for (i = 0; i < MAX_PIPES; i++) {
563 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
564
565 if (assignment.valid) {
566 if (assignment.stream == state->streams[i])
567 matching_stream_ptrs++;
568 else
569 valid_stream_ptrs = false;
570 }
571 }
572
573 /* (3) Each endpoint assigned unique encoder. */
574 for (i = 0; i < MAX_PIPES; i++) {
575 struct link_enc_assignment assignment_i = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
576
577 if (assignment_i.valid) {
578 struct display_endpoint_id ep_id_i = assignment_i.ep_id;
579
580 eng_ids_per_ep_id[i]++;
581 for (j = 0; j < MAX_PIPES; j++) {
582 struct link_enc_assignment assignment_j =
583 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j];
584
585 if (j == i)
586 continue;
587
588 if (assignment_j.valid) {
589 struct display_endpoint_id ep_id_j = assignment_j.ep_id;
590
591 if (are_ep_ids_equal(&ep_id_i, &ep_id_j) &&
592 assignment_i.eng_id != assignment_j.eng_id) {
593 valid_uniqueness = false;
594 eng_ids_per_ep_id[i]++;
595 }
596 }
597 }
598 }
599 }
600
601 /* (4) Assigned encoders not in available pool. */
602 for (i = 0; i < MAX_PIPES; i++) {
603 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
604
605 if (assignment.valid) {
606 for (j = 0; j < dc->res_pool->res_cap->num_dig_link_enc; j++) {
607 if (state->res_ctx.link_enc_cfg_ctx.link_enc_avail[j] == assignment.eng_id) {
608 valid_avail = false;
609 break;
610 }
611 }
612 }
613 }
614
615 /* (5) All streams have valid link encoders. */
616 for (i = 0; i < state->stream_count; i++) {
617 struct dc_stream_state *stream = state->streams[i];
618
619 if (is_dig_link_enc_stream(stream) && stream->link_enc == NULL) {
620 valid_streams = false;
621 break;
622 }
623 }
624
625 is_valid = valid_entries && valid_stream_ptrs && valid_uniqueness && valid_avail && valid_streams;
626 ASSERT(is_valid);
627
628 return is_valid;
629 }
630