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. */ 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 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. */ 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 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 } 133 134 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. */ 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. */ 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. */ 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 } 224 225 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. */ 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 } 267 268 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 } 276 277 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 } 283 284 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 } 423 424 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 } 435 436 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 } 449 450 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 } 468 469 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 } 484 485 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 } 508 509 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 } 536 537 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 } 547 548 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 } 567 568 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 } 592 593 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 } 613 614 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 } 727 728 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