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. */ 32static 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 stream->ctx->dc->link_srv->dp_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 67static 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. */ 80static 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 99static 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 134static 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. */ 170static enum engine_id find_first_avail_link_enc( 171 const struct dc_context *ctx, 172 const struct dc_state *state, 173 enum engine_id eng_id_requested) 174{ 175 enum engine_id eng_id = ENGINE_ID_UNKNOWN; 176 int i; 177 178 if (eng_id_requested != ENGINE_ID_UNKNOWN) { 179 180 for (i = 0; i < ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) { 181 eng_id = state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i]; 182 if (eng_id == eng_id_requested) 183 return eng_id; 184 } 185 } 186 187 eng_id = ENGINE_ID_UNKNOWN; 188 189 for (i = 0; i < ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) { 190 eng_id = state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i]; 191 if (eng_id != ENGINE_ID_UNKNOWN) 192 break; 193 } 194 195 return eng_id; 196} 197 198/* Check for availability of link encoder eng_id. */ 199static bool is_avail_link_enc(struct dc_state *state, enum engine_id eng_id, struct dc_stream_state *stream) 200{ 201 bool is_avail = false; 202 int eng_idx = eng_id - ENGINE_ID_DIGA; 203 204 /* An encoder is available if it is still in the availability pool. */ 205 if (eng_id != ENGINE_ID_UNKNOWN && state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] != ENGINE_ID_UNKNOWN) { 206 is_avail = true; 207 } else { 208 struct dc_stream_state *stream_assigned = NULL; 209 210 /* MST streams share the same link and should share the same encoder. 211 * If a stream that has already been assigned a link encoder uses as the 212 * same link as the stream checking for availability, it is an MST stream 213 * and should use the same link encoder. 214 */ 215 stream_assigned = get_stream_using_link_enc(state, eng_id); 216 if (stream_assigned && stream != stream_assigned && stream->link == stream_assigned->link) 217 is_avail = true; 218 } 219 220 return is_avail; 221} 222 223/* Test for display_endpoint_id equality. */ 224static bool are_ep_ids_equal(struct display_endpoint_id *lhs, struct display_endpoint_id *rhs) 225{ 226 bool are_equal = false; 227 228 if (lhs->link_id.id == rhs->link_id.id && 229 lhs->link_id.enum_id == rhs->link_id.enum_id && 230 lhs->link_id.type == rhs->link_id.type && 231 lhs->ep_type == rhs->ep_type) 232 are_equal = true; 233 234 return are_equal; 235} 236 237static struct link_encoder *get_link_enc_used_by_link( 238 struct dc_state *state, 239 const struct dc_link *link) 240{ 241 struct link_encoder *link_enc = NULL; 242 struct display_endpoint_id ep_id; 243 int i; 244 245 ep_id = (struct display_endpoint_id) { 246 .link_id = link->link_id, 247 .ep_type = link->ep_type}; 248 249 for (i = 0; i < MAX_PIPES; i++) { 250 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; 251 252 if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id)) 253 link_enc = link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA]; 254 } 255 256 return link_enc; 257} 258/* Clear all link encoder assignments. */ 259static void clear_enc_assignments(const struct dc *dc, struct dc_state *state) 260{ 261 int i; 262 263 for (i = 0; i < MAX_PIPES; i++) { 264 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid = false; 265 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].eng_id = ENGINE_ID_UNKNOWN; 266 if (state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream != NULL) { 267 dc_stream_release(state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream); 268 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream = NULL; 269 } 270 } 271 272 for (i = 0; i < dc->res_pool->res_cap->num_dig_link_enc; i++) { 273 if (dc->res_pool->link_encoders[i]) 274 state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i] = (enum engine_id) i; 275 else 276 state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i] = ENGINE_ID_UNKNOWN; 277 } 278} 279 280void link_enc_cfg_init( 281 const struct dc *dc, 282 struct dc_state *state) 283{ 284 clear_enc_assignments(dc, state); 285 286 state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_STEADY; 287} 288 289void link_enc_cfg_copy(const struct dc_state *src_ctx, struct dc_state *dst_ctx) 290{ 291 memcpy(&dst_ctx->res_ctx.link_enc_cfg_ctx, 292 &src_ctx->res_ctx.link_enc_cfg_ctx, 293 sizeof(dst_ctx->res_ctx.link_enc_cfg_ctx)); 294} 295 296void link_enc_cfg_link_encs_assign( 297 struct dc *dc, 298 struct dc_state *state, 299 struct dc_stream_state *streams[], 300 uint8_t stream_count) 301{ 302 enum engine_id eng_id = ENGINE_ID_UNKNOWN, eng_id_req = ENGINE_ID_UNKNOWN; 303 int i; 304 int j; 305 306 ASSERT(state->stream_count == stream_count); 307 ASSERT(dc->current_state->res_ctx.link_enc_cfg_ctx.mode == LINK_ENC_CFG_STEADY); 308 309 /* Release DIG link encoder resources before running assignment algorithm. */ 310 for (i = 0; i < dc->current_state->stream_count; i++) 311 dc->res_pool->funcs->link_enc_unassign(state, dc->current_state->streams[i]); 312 313 for (i = 0; i < MAX_PIPES; i++) 314 ASSERT(state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid == false); 315 316 /* (a) Assign DIG link encoders to physical (unmappable) endpoints first. */ 317 for (i = 0; i < stream_count; i++) { 318 struct dc_stream_state *stream = streams[i]; 319 320 /* skip it if the link is mappable endpoint. */ 321 if (stream->link->is_dig_mapping_flexible) 322 continue; 323 324 /* Skip stream if not supported by DIG link encoder. */ 325 if (!is_dig_link_enc_stream(stream)) 326 continue; 327 328 /* Physical endpoints have a fixed mapping to DIG link encoders. */ 329 eng_id = stream->link->eng_id; 330 add_link_enc_assignment(state, stream, eng_id); 331 } 332 333 /* (b) Retain previous assignments for mappable endpoints if encoders still available. */ 334 eng_id = ENGINE_ID_UNKNOWN; 335 336 if (state != dc->current_state) { 337 struct dc_state *prev_state = dc->current_state; 338 339 for (i = 0; i < stream_count; i++) { 340 struct dc_stream_state *stream = state->streams[i]; 341 342 /* Skip it if the link is NOT mappable endpoint. */ 343 if (!stream->link->is_dig_mapping_flexible) 344 continue; 345 346 /* Skip stream if not supported by DIG link encoder. */ 347 if (!is_dig_link_enc_stream(stream)) 348 continue; 349 350 for (j = 0; j < prev_state->stream_count; j++) { 351 struct dc_stream_state *prev_stream = prev_state->streams[j]; 352 353 if (stream == prev_stream && stream->link == prev_stream->link && 354 prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].valid) { 355 eng_id = prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].eng_id; 356 357 if (is_avail_link_enc(state, eng_id, stream)) 358 add_link_enc_assignment(state, stream, eng_id); 359 } 360 } 361 } 362 } 363 364 /* (c) Then assign encoders to remaining mappable endpoints. */ 365 eng_id = ENGINE_ID_UNKNOWN; 366 367 for (i = 0; i < stream_count; i++) { 368 struct dc_stream_state *stream = streams[i]; 369 struct link_encoder *link_enc = NULL; 370 371 /* Skip it if the link is NOT mappable endpoint. */ 372 if (!stream->link->is_dig_mapping_flexible) 373 continue; 374 375 /* Skip if encoder assignment retained in step (b) above. */ 376 if (stream->link_enc) 377 continue; 378 379 /* Skip stream if not supported by DIG link encoder. */ 380 if (!is_dig_link_enc_stream(stream)) { 381 ASSERT(stream->link->is_dig_mapping_flexible != true); 382 continue; 383 } 384 385 /* Mappable endpoints have a flexible mapping to DIG link encoders. */ 386 387 /* For MST, multiple streams will share the same link / display 388 * endpoint. These streams should use the same link encoder 389 * assigned to that endpoint. 390 */ 391 link_enc = get_link_enc_used_by_link(state, stream->link); 392 if (link_enc == NULL) { 393 394 if (stream->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && 395 stream->link->dpia_preferred_eng_id != ENGINE_ID_UNKNOWN) 396 eng_id_req = stream->link->dpia_preferred_eng_id; 397 398 eng_id = find_first_avail_link_enc(stream->ctx, state, eng_id_req); 399 } 400 else 401 eng_id = link_enc->preferred_engine; 402 403 add_link_enc_assignment(state, stream, eng_id); 404 } 405 406 link_enc_cfg_validate(dc, state); 407 408 /* Update transient assignments. */ 409 for (i = 0; i < MAX_PIPES; i++) { 410 dc->current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i] = 411 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; 412 } 413 414 /* Log encoder assignments. */ 415 for (i = 0; i < MAX_PIPES; i++) { 416 struct link_enc_assignment assignment = 417 dc->current_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; 418 419 if (assignment.valid) 420 DC_LOG_DEBUG("%s: CUR %s(%d) - enc_id(%d)\n", 421 __func__, 422 assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? "PHY" : "DPIA", 423 assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? 424 assignment.ep_id.link_id.enum_id : 425 assignment.ep_id.link_id.enum_id - 1, 426 assignment.eng_id); 427 } 428 for (i = 0; i < MAX_PIPES; i++) { 429 struct link_enc_assignment assignment = 430 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; 431 432 if (assignment.valid) 433 DC_LOG_DEBUG("%s: NEW %s(%d) - enc_id(%d)\n", 434 __func__, 435 assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? "PHY" : "DPIA", 436 assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? 437 assignment.ep_id.link_id.enum_id : 438 assignment.ep_id.link_id.enum_id - 1, 439 assignment.eng_id); 440 } 441 442 /* Current state mode will be set to steady once this state committed. */ 443 state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_STEADY; 444} 445 446void link_enc_cfg_link_enc_unassign( 447 struct dc_state *state, 448 struct dc_stream_state *stream) 449{ 450 enum engine_id eng_id = ENGINE_ID_UNKNOWN; 451 452 if (stream->link_enc) 453 eng_id = stream->link_enc->preferred_engine; 454 455 remove_link_enc_assignment(state, stream, eng_id); 456} 457 458bool link_enc_cfg_is_transmitter_mappable( 459 struct dc *dc, 460 struct link_encoder *link_enc) 461{ 462 bool is_mappable = false; 463 enum engine_id eng_id = link_enc->preferred_engine; 464 struct dc_stream_state *stream = link_enc_cfg_get_stream_using_link_enc(dc, eng_id); 465 466 if (stream) 467 is_mappable = stream->link->is_dig_mapping_flexible; 468 469 return is_mappable; 470} 471 472struct dc_stream_state *link_enc_cfg_get_stream_using_link_enc( 473 struct dc *dc, 474 enum engine_id eng_id) 475{ 476 struct dc_stream_state *stream = NULL; 477 int i; 478 479 for (i = 0; i < MAX_PIPES; i++) { 480 struct link_enc_assignment assignment = get_assignment(dc, i); 481 482 if ((assignment.valid == true) && (assignment.eng_id == eng_id)) { 483 stream = assignment.stream; 484 break; 485 } 486 } 487 488 return stream; 489} 490 491struct dc_link *link_enc_cfg_get_link_using_link_enc( 492 struct dc *dc, 493 enum engine_id eng_id) 494{ 495 struct dc_link *link = NULL; 496 struct dc_stream_state *stream = NULL; 497 498 stream = link_enc_cfg_get_stream_using_link_enc(dc, eng_id); 499 500 if (stream) 501 link = stream->link; 502 503 return link; 504} 505 506struct link_encoder *link_enc_cfg_get_link_enc_used_by_link( 507 struct dc *dc, 508 const struct dc_link *link) 509{ 510 struct link_encoder *link_enc = NULL; 511 struct display_endpoint_id ep_id; 512 int i; 513 514 ep_id = (struct display_endpoint_id) { 515 .link_id = link->link_id, 516 .ep_type = link->ep_type}; 517 518 for (i = 0; i < MAX_PIPES; i++) { 519 struct link_enc_assignment assignment = get_assignment(dc, i); 520 521 if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id)) { 522 link_enc = link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA]; 523 break; 524 } 525 } 526 527 return link_enc; 528} 529 530struct link_encoder *link_enc_cfg_get_next_avail_link_enc(struct dc *dc) 531{ 532 struct link_encoder *link_enc = NULL; 533 enum engine_id encs_assigned[MAX_DIG_LINK_ENCODERS]; 534 int i; 535 536 for (i = 0; i < MAX_DIG_LINK_ENCODERS; i++) 537 encs_assigned[i] = ENGINE_ID_UNKNOWN; 538 539 /* Add assigned encoders to list. */ 540 for (i = 0; i < MAX_PIPES; i++) { 541 struct link_enc_assignment assignment = get_assignment(dc, i); 542 543 if (assignment.valid) 544 encs_assigned[assignment.eng_id - ENGINE_ID_DIGA] = assignment.eng_id; 545 } 546 547 for (i = 0; i < dc->res_pool->res_cap->num_dig_link_enc; i++) { 548 if (encs_assigned[i] == ENGINE_ID_UNKNOWN && 549 dc->res_pool->link_encoders[i] != NULL) { 550 link_enc = dc->res_pool->link_encoders[i]; 551 break; 552 } 553 } 554 555 return link_enc; 556} 557 558struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream( 559 struct dc *dc, 560 const struct dc_stream_state *stream) 561{ 562 struct link_encoder *link_enc; 563 564 link_enc = link_enc_cfg_get_link_enc_used_by_link(dc, stream->link); 565 566 return link_enc; 567} 568 569struct link_encoder *link_enc_cfg_get_link_enc( 570 const struct dc_link *link) 571{ 572 struct link_encoder *link_enc = NULL; 573 574 /* Links supporting dynamically assigned link encoder will be assigned next 575 * available encoder if one not already assigned. 576 */ 577 if (link->is_dig_mapping_flexible && 578 link->dc->res_pool->funcs->link_encs_assign) { 579 link_enc = link_enc_cfg_get_link_enc_used_by_link(link->ctx->dc, link); 580 if (link_enc == NULL) 581 link_enc = link_enc_cfg_get_next_avail_link_enc( 582 link->ctx->dc); 583 } else 584 link_enc = link->link_enc; 585 586 return link_enc; 587} 588 589struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream_current( 590 struct dc *dc, 591 const struct dc_stream_state *stream) 592{ 593 struct link_encoder *link_enc = NULL; 594 struct display_endpoint_id ep_id; 595 int i; 596 597 ep_id = (struct display_endpoint_id) { 598 .link_id = stream->link->link_id, 599 .ep_type = stream->link->ep_type}; 600 601 for (i = 0; i < MAX_PIPES; i++) { 602 struct link_enc_assignment assignment = 603 dc->current_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; 604 605 if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id)) { 606 link_enc = stream->link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA]; 607 break; 608 } 609 } 610 611 return link_enc; 612} 613 614bool link_enc_cfg_is_link_enc_avail(struct dc *dc, enum engine_id eng_id, struct dc_link *link) 615{ 616 bool is_avail = true; 617 int i; 618 619 /* An encoder is not available if it has already been assigned to a different endpoint. */ 620 for (i = 0; i < MAX_PIPES; i++) { 621 struct link_enc_assignment assignment = get_assignment(dc, i); 622 struct display_endpoint_id ep_id = (struct display_endpoint_id) { 623 .link_id = link->link_id, 624 .ep_type = link->ep_type}; 625 626 if (assignment.valid && assignment.eng_id == eng_id && !are_ep_ids_equal(&ep_id, &assignment.ep_id)) { 627 is_avail = false; 628 break; 629 } 630 } 631 632 return is_avail; 633} 634 635bool link_enc_cfg_validate(struct dc *dc, struct dc_state *state) 636{ 637 bool is_valid = false; 638 bool valid_entries = true; 639 bool valid_stream_ptrs = true; 640 bool valid_uniqueness = true; 641 bool valid_avail = true; 642 bool valid_streams = true; 643 int i, j; 644 uint8_t valid_count = 0; 645 uint8_t dig_stream_count = 0; 646 int eng_ids_per_ep_id[MAX_PIPES] = {0}; 647 int ep_ids_per_eng_id[MAX_PIPES] = {0}; 648 int valid_bitmap = 0; 649 650 /* (1) No. valid entries same as stream count. */ 651 for (i = 0; i < MAX_PIPES; i++) { 652 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; 653 654 if (assignment.valid) 655 valid_count++; 656 657 if (is_dig_link_enc_stream(state->streams[i])) 658 dig_stream_count++; 659 } 660 if (valid_count != dig_stream_count) 661 valid_entries = false; 662 663 /* (2) Matching stream ptrs. */ 664 for (i = 0; i < MAX_PIPES; i++) { 665 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; 666 667 if (assignment.valid) { 668 if (assignment.stream != state->streams[i]) 669 valid_stream_ptrs = false; 670 } 671 } 672 673 /* (3) Each endpoint assigned unique encoder. */ 674 for (i = 0; i < MAX_PIPES; i++) { 675 struct link_enc_assignment assignment_i = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; 676 677 if (assignment_i.valid) { 678 struct display_endpoint_id ep_id_i = assignment_i.ep_id; 679 680 eng_ids_per_ep_id[i]++; 681 ep_ids_per_eng_id[i]++; 682 for (j = 0; j < MAX_PIPES; j++) { 683 struct link_enc_assignment assignment_j = 684 state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j]; 685 686 if (j == i) 687 continue; 688 689 if (assignment_j.valid) { 690 struct display_endpoint_id ep_id_j = assignment_j.ep_id; 691 692 if (are_ep_ids_equal(&ep_id_i, &ep_id_j) && 693 assignment_i.eng_id != assignment_j.eng_id) { 694 valid_uniqueness = false; 695 eng_ids_per_ep_id[i]++; 696 } else if (!are_ep_ids_equal(&ep_id_i, &ep_id_j) && 697 assignment_i.eng_id == assignment_j.eng_id) { 698 valid_uniqueness = false; 699 ep_ids_per_eng_id[i]++; 700 } 701 } 702 } 703 } 704 } 705 706 /* (4) Assigned encoders not in available pool. */ 707 for (i = 0; i < MAX_PIPES; i++) { 708 struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; 709 710 if (assignment.valid) { 711 for (j = 0; j < dc->res_pool->res_cap->num_dig_link_enc; j++) { 712 if (state->res_ctx.link_enc_cfg_ctx.link_enc_avail[j] == assignment.eng_id) { 713 valid_avail = false; 714 break; 715 } 716 } 717 } 718 } 719 720 /* (5) All streams have valid link encoders. */ 721 for (i = 0; i < state->stream_count; i++) { 722 struct dc_stream_state *stream = state->streams[i]; 723 724 if (is_dig_link_enc_stream(stream) && stream->link_enc == NULL) { 725 valid_streams = false; 726 break; 727 } 728 } 729 730 is_valid = valid_entries && valid_stream_ptrs && valid_uniqueness && valid_avail && valid_streams; 731 ASSERT(is_valid); 732 733 if (is_valid == false) { 734 valid_bitmap = 735 (valid_entries & 0x1) | 736 ((valid_stream_ptrs & 0x1) << 1) | 737 ((valid_uniqueness & 0x1) << 2) | 738 ((valid_avail & 0x1) << 3) | 739 ((valid_streams & 0x1) << 4); 740 DC_LOG_ERROR("%s: Invalid link encoder assignments - 0x%x\n", __func__, valid_bitmap); 741 } 742 743 return is_valid; 744} 745 746void link_enc_cfg_set_transient_mode(struct dc *dc, struct dc_state *current_state, struct dc_state *new_state) 747{ 748 int i = 0; 749 int num_transient_assignments = 0; 750 751 for (i = 0; i < MAX_PIPES; i++) { 752 if (current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i].valid) 753 num_transient_assignments++; 754 } 755 756 /* Only enter transient mode if the new encoder assignments are valid. */ 757 if (new_state->stream_count == num_transient_assignments) { 758 current_state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_TRANSIENT; 759 DC_LOG_DEBUG("%s: current_state(%p) mode(%d)\n", __func__, current_state, LINK_ENC_CFG_TRANSIENT); 760 } 761} 762