1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright 2018 Noralf Trønnes 4 * Copyright (c) 2006-2009 Red Hat Inc. 5 * Copyright (c) 2006-2008 Intel Corporation 6 * Jesse Barnes <jesse.barnes@intel.com> 7 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 8 */ 9 10 #include <linux/module.h> 11 #include <linux/mutex.h> 12 #include <linux/slab.h> 13 14 #include <drm/drm_atomic.h> 15 #include <drm/drm_client.h> 16 #include <drm/drm_connector.h> 17 #include <drm/drm_crtc.h> 18 #include <drm/drm_device.h> 19 #include <drm/drm_drv.h> 20 #include <drm/drm_encoder.h> 21 #include <drm/drm_print.h> 22 23 #include "drm_crtc_internal.h" 24 #include "drm_internal.h" 25 26 #define DRM_CLIENT_MAX_CLONED_CONNECTORS 8 27 28 struct drm_client_offset { 29 int x, y; 30 }; 31 32 int drm_client_modeset_create(struct drm_client_dev *client) 33 { 34 struct drm_device *dev = client->dev; 35 unsigned int num_crtc = dev->mode_config.num_crtc; 36 unsigned int max_connector_count = 1; 37 struct drm_mode_set *modeset; 38 struct drm_crtc *crtc; 39 unsigned int i = 0; 40 41 /* Add terminating zero entry to enable index less iteration */ 42 client->modesets = kcalloc(num_crtc + 1, sizeof(*client->modesets), GFP_KERNEL); 43 if (!client->modesets) 44 return -ENOMEM; 45 46 mutex_init(&client->modeset_mutex); 47 48 drm_for_each_crtc(crtc, dev) 49 client->modesets[i++].crtc = crtc; 50 51 /* Cloning is only supported in the single crtc case. */ 52 if (num_crtc == 1) 53 max_connector_count = DRM_CLIENT_MAX_CLONED_CONNECTORS; 54 55 for (modeset = client->modesets; modeset->crtc; modeset++) { 56 modeset->connectors = kcalloc(max_connector_count, 57 sizeof(*modeset->connectors), GFP_KERNEL); 58 if (!modeset->connectors) 59 goto err_free; 60 } 61 62 return 0; 63 64 err_free: 65 drm_client_modeset_free(client); 66 67 return -ENOMEM; 68 } 69 70 static void drm_client_modeset_release(struct drm_client_dev *client) 71 { 72 struct drm_mode_set *modeset; 73 unsigned int i; 74 75 drm_client_for_each_modeset(modeset, client) { 76 drm_mode_destroy(client->dev, modeset->mode); 77 modeset->mode = NULL; 78 modeset->fb = NULL; 79 80 for (i = 0; i < modeset->num_connectors; i++) { 81 drm_connector_put(modeset->connectors[i]); 82 modeset->connectors[i] = NULL; 83 } 84 modeset->num_connectors = 0; 85 } 86 } 87 88 void drm_client_modeset_free(struct drm_client_dev *client) 89 { 90 struct drm_mode_set *modeset; 91 92 mutex_lock(&client->modeset_mutex); 93 94 drm_client_modeset_release(client); 95 96 drm_client_for_each_modeset(modeset, client) 97 kfree(modeset->connectors); 98 99 mutex_unlock(&client->modeset_mutex); 100 101 mutex_destroy(&client->modeset_mutex); 102 kfree(client->modesets); 103 } 104 105 static struct drm_mode_set * 106 drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc) 107 { 108 struct drm_mode_set *modeset; 109 110 drm_client_for_each_modeset(modeset, client) 111 if (modeset->crtc == crtc) 112 return modeset; 113 114 return NULL; 115 } 116 117 static struct drm_display_mode * 118 drm_connector_get_tiled_mode(struct drm_connector *connector) 119 { 120 struct drm_display_mode *mode; 121 122 list_for_each_entry(mode, &connector->modes, head) { 123 if (mode->hdisplay == connector->tile_h_size && 124 mode->vdisplay == connector->tile_v_size) 125 return mode; 126 } 127 return NULL; 128 } 129 130 static struct drm_display_mode * 131 drm_connector_fallback_non_tiled_mode(struct drm_connector *connector) 132 { 133 struct drm_display_mode *mode; 134 135 list_for_each_entry(mode, &connector->modes, head) { 136 if (mode->hdisplay == connector->tile_h_size && 137 mode->vdisplay == connector->tile_v_size) 138 continue; 139 return mode; 140 } 141 return NULL; 142 } 143 144 static struct drm_display_mode * 145 drm_connector_has_preferred_mode(struct drm_connector *connector, int width, int height) 146 { 147 struct drm_display_mode *mode; 148 149 list_for_each_entry(mode, &connector->modes, head) { 150 if (mode->hdisplay > width || 151 mode->vdisplay > height) 152 continue; 153 if (mode->type & DRM_MODE_TYPE_PREFERRED) 154 return mode; 155 } 156 return NULL; 157 } 158 159 static struct drm_display_mode * 160 drm_connector_pick_cmdline_mode(struct drm_connector *connector) 161 { 162 struct drm_cmdline_mode *cmdline_mode; 163 struct drm_display_mode *mode; 164 bool prefer_non_interlace; 165 166 cmdline_mode = &connector->cmdline_mode; 167 if (cmdline_mode->specified == false) 168 return NULL; 169 170 /* attempt to find a matching mode in the list of modes 171 * we have gotten so far, if not add a CVT mode that conforms 172 */ 173 if (cmdline_mode->rb || cmdline_mode->margins) 174 goto create_mode; 175 176 prefer_non_interlace = !cmdline_mode->interlace; 177 again: 178 list_for_each_entry(mode, &connector->modes, head) { 179 /* Check (optional) mode name first */ 180 if (!strcmp(mode->name, cmdline_mode->name)) 181 return mode; 182 183 /* check width/height */ 184 if (mode->hdisplay != cmdline_mode->xres || 185 mode->vdisplay != cmdline_mode->yres) 186 continue; 187 188 if (cmdline_mode->refresh_specified) { 189 if (drm_mode_vrefresh(mode) != cmdline_mode->refresh) 190 continue; 191 } 192 193 if (cmdline_mode->interlace) { 194 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) 195 continue; 196 } else if (prefer_non_interlace) { 197 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 198 continue; 199 } 200 return mode; 201 } 202 203 if (prefer_non_interlace) { 204 prefer_non_interlace = false; 205 goto again; 206 } 207 208 create_mode: 209 mode = drm_mode_create_from_cmdline_mode(connector->dev, cmdline_mode); 210 if (mode) 211 list_add(&mode->head, &connector->modes); 212 213 return mode; 214 } 215 216 static bool drm_connector_enabled(struct drm_connector *connector, bool strict) 217 { 218 bool enable; 219 220 if (connector->display_info.non_desktop) 221 return false; 222 223 if (strict) 224 enable = connector->status == connector_status_connected; 225 else 226 enable = connector->status != connector_status_disconnected; 227 228 return enable; 229 } 230 231 static void drm_client_connectors_enabled(struct drm_connector **connectors, 232 unsigned int connector_count, 233 bool *enabled) 234 { 235 bool any_enabled = false; 236 struct drm_connector *connector; 237 int i = 0; 238 239 for (i = 0; i < connector_count; i++) { 240 connector = connectors[i]; 241 enabled[i] = drm_connector_enabled(connector, true); 242 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, 243 connector->display_info.non_desktop ? "non desktop" : enabled[i] ? "yes" : "no"); 244 245 any_enabled |= enabled[i]; 246 } 247 248 if (any_enabled) 249 return; 250 251 for (i = 0; i < connector_count; i++) 252 enabled[i] = drm_connector_enabled(connectors[i], false); 253 } 254 255 static bool drm_client_target_cloned(struct drm_device *dev, 256 struct drm_connector **connectors, 257 unsigned int connector_count, 258 struct drm_display_mode **modes, 259 struct drm_client_offset *offsets, 260 bool *enabled, int width, int height) 261 { 262 int count, i, j; 263 bool can_clone = false; 264 struct drm_display_mode *dmt_mode, *mode; 265 266 /* only contemplate cloning in the single crtc case */ 267 if (dev->mode_config.num_crtc > 1) 268 return false; 269 270 count = 0; 271 for (i = 0; i < connector_count; i++) { 272 if (enabled[i]) 273 count++; 274 } 275 276 /* only contemplate cloning if more than one connector is enabled */ 277 if (count <= 1) 278 return false; 279 280 /* check the command line or if nothing common pick 1024x768 */ 281 can_clone = true; 282 for (i = 0; i < connector_count; i++) { 283 if (!enabled[i]) 284 continue; 285 modes[i] = drm_connector_pick_cmdline_mode(connectors[i]); 286 if (!modes[i]) { 287 can_clone = false; 288 break; 289 } 290 for (j = 0; j < i; j++) { 291 if (!enabled[j]) 292 continue; 293 if (!drm_mode_match(modes[j], modes[i], 294 DRM_MODE_MATCH_TIMINGS | 295 DRM_MODE_MATCH_CLOCK | 296 DRM_MODE_MATCH_FLAGS | 297 DRM_MODE_MATCH_3D_FLAGS)) 298 can_clone = false; 299 } 300 } 301 302 if (can_clone) { 303 DRM_DEBUG_KMS("can clone using command line\n"); 304 return true; 305 } 306 307 /* try and find a 1024x768 mode on each connector */ 308 can_clone = true; 309 dmt_mode = drm_mode_find_dmt(dev, 1024, 768, 60, false); 310 311 for (i = 0; i < connector_count; i++) { 312 if (!enabled[i]) 313 continue; 314 315 list_for_each_entry(mode, &connectors[i]->modes, head) { 316 if (drm_mode_match(mode, dmt_mode, 317 DRM_MODE_MATCH_TIMINGS | 318 DRM_MODE_MATCH_CLOCK | 319 DRM_MODE_MATCH_FLAGS | 320 DRM_MODE_MATCH_3D_FLAGS)) 321 modes[i] = mode; 322 } 323 if (!modes[i]) 324 can_clone = false; 325 } 326 327 if (can_clone) { 328 DRM_DEBUG_KMS("can clone using 1024x768\n"); 329 return true; 330 } 331 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); 332 return false; 333 } 334 335 static int drm_client_get_tile_offsets(struct drm_connector **connectors, 336 unsigned int connector_count, 337 struct drm_display_mode **modes, 338 struct drm_client_offset *offsets, 339 int idx, 340 int h_idx, int v_idx) 341 { 342 struct drm_connector *connector; 343 int i; 344 int hoffset = 0, voffset = 0; 345 346 for (i = 0; i < connector_count; i++) { 347 connector = connectors[i]; 348 if (!connector->has_tile) 349 continue; 350 351 if (!modes[i] && (h_idx || v_idx)) { 352 DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, 353 connector->base.id); 354 continue; 355 } 356 if (connector->tile_h_loc < h_idx) 357 hoffset += modes[i]->hdisplay; 358 359 if (connector->tile_v_loc < v_idx) 360 voffset += modes[i]->vdisplay; 361 } 362 offsets[idx].x = hoffset; 363 offsets[idx].y = voffset; 364 DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); 365 return 0; 366 } 367 368 static bool drm_client_target_preferred(struct drm_connector **connectors, 369 unsigned int connector_count, 370 struct drm_display_mode **modes, 371 struct drm_client_offset *offsets, 372 bool *enabled, int width, int height) 373 { 374 const u64 mask = BIT_ULL(connector_count) - 1; 375 struct drm_connector *connector; 376 u64 conn_configured = 0; 377 int tile_pass = 0; 378 int num_tiled_conns = 0; 379 int i; 380 381 for (i = 0; i < connector_count; i++) { 382 if (connectors[i]->has_tile && 383 connectors[i]->status == connector_status_connected) 384 num_tiled_conns++; 385 } 386 387 retry: 388 for (i = 0; i < connector_count; i++) { 389 connector = connectors[i]; 390 391 if (conn_configured & BIT_ULL(i)) 392 continue; 393 394 if (enabled[i] == false) { 395 conn_configured |= BIT_ULL(i); 396 continue; 397 } 398 399 /* first pass over all the untiled connectors */ 400 if (tile_pass == 0 && connector->has_tile) 401 continue; 402 403 if (tile_pass == 1) { 404 if (connector->tile_h_loc != 0 || 405 connector->tile_v_loc != 0) 406 continue; 407 408 } else { 409 if (connector->tile_h_loc != tile_pass - 1 && 410 connector->tile_v_loc != tile_pass - 1) 411 /* if this tile_pass doesn't cover any of the tiles - keep going */ 412 continue; 413 414 /* 415 * find the tile offsets for this pass - need to find 416 * all tiles left and above 417 */ 418 drm_client_get_tile_offsets(connectors, connector_count, modes, offsets, i, 419 connector->tile_h_loc, connector->tile_v_loc); 420 } 421 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", 422 connector->base.id); 423 424 /* got for command line mode first */ 425 modes[i] = drm_connector_pick_cmdline_mode(connector); 426 if (!modes[i]) { 427 DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", 428 connector->base.id, connector->tile_group ? connector->tile_group->id : 0); 429 modes[i] = drm_connector_has_preferred_mode(connector, width, height); 430 } 431 /* No preferred modes, pick one off the list */ 432 if (!modes[i] && !list_empty(&connector->modes)) { 433 list_for_each_entry(modes[i], &connector->modes, head) 434 break; 435 } 436 /* 437 * In case of tiled mode if all tiles not present fallback to 438 * first available non tiled mode. 439 * After all tiles are present, try to find the tiled mode 440 * for all and if tiled mode not present due to fbcon size 441 * limitations, use first non tiled mode only for 442 * tile 0,0 and set to no mode for all other tiles. 443 */ 444 if (connector->has_tile) { 445 if (num_tiled_conns < 446 connector->num_h_tile * connector->num_v_tile || 447 (connector->tile_h_loc == 0 && 448 connector->tile_v_loc == 0 && 449 !drm_connector_get_tiled_mode(connector))) { 450 DRM_DEBUG_KMS("Falling back to non tiled mode on Connector %d\n", 451 connector->base.id); 452 modes[i] = drm_connector_fallback_non_tiled_mode(connector); 453 } else { 454 modes[i] = drm_connector_get_tiled_mode(connector); 455 } 456 } 457 458 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : 459 "none"); 460 conn_configured |= BIT_ULL(i); 461 } 462 463 if ((conn_configured & mask) != mask) { 464 tile_pass++; 465 goto retry; 466 } 467 return true; 468 } 469 470 static bool connector_has_possible_crtc(struct drm_connector *connector, 471 struct drm_crtc *crtc) 472 { 473 struct drm_encoder *encoder; 474 475 drm_connector_for_each_possible_encoder(connector, encoder) { 476 if (encoder->possible_crtcs & drm_crtc_mask(crtc)) 477 return true; 478 } 479 480 return false; 481 } 482 483 static int drm_client_pick_crtcs(struct drm_client_dev *client, 484 struct drm_connector **connectors, 485 unsigned int connector_count, 486 struct drm_crtc **best_crtcs, 487 struct drm_display_mode **modes, 488 int n, int width, int height) 489 { 490 struct drm_device *dev = client->dev; 491 struct drm_connector *connector; 492 int my_score, best_score, score; 493 struct drm_crtc **crtcs, *crtc; 494 struct drm_mode_set *modeset; 495 int o; 496 497 if (n == connector_count) 498 return 0; 499 500 connector = connectors[n]; 501 502 best_crtcs[n] = NULL; 503 best_score = drm_client_pick_crtcs(client, connectors, connector_count, 504 best_crtcs, modes, n + 1, width, height); 505 if (modes[n] == NULL) 506 return best_score; 507 508 crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); 509 if (!crtcs) 510 return best_score; 511 512 my_score = 1; 513 if (connector->status == connector_status_connected) 514 my_score++; 515 if (connector->cmdline_mode.specified) 516 my_score++; 517 if (drm_connector_has_preferred_mode(connector, width, height)) 518 my_score++; 519 520 /* 521 * select a crtc for this connector and then attempt to configure 522 * remaining connectors 523 */ 524 drm_client_for_each_modeset(modeset, client) { 525 crtc = modeset->crtc; 526 527 if (!connector_has_possible_crtc(connector, crtc)) 528 continue; 529 530 for (o = 0; o < n; o++) 531 if (best_crtcs[o] == crtc) 532 break; 533 534 if (o < n) { 535 /* ignore cloning unless only a single crtc */ 536 if (dev->mode_config.num_crtc > 1) 537 continue; 538 539 if (!drm_mode_equal(modes[o], modes[n])) 540 continue; 541 } 542 543 crtcs[n] = crtc; 544 memcpy(crtcs, best_crtcs, n * sizeof(*crtcs)); 545 score = my_score + drm_client_pick_crtcs(client, connectors, connector_count, 546 crtcs, modes, n + 1, width, height); 547 if (score > best_score) { 548 best_score = score; 549 memcpy(best_crtcs, crtcs, connector_count * sizeof(*crtcs)); 550 } 551 } 552 553 kfree(crtcs); 554 return best_score; 555 } 556 557 /* Try to read the BIOS display configuration and use it for the initial config */ 558 static bool drm_client_firmware_config(struct drm_client_dev *client, 559 struct drm_connector **connectors, 560 unsigned int connector_count, 561 struct drm_crtc **crtcs, 562 struct drm_display_mode **modes, 563 struct drm_client_offset *offsets, 564 bool *enabled, int width, int height) 565 { 566 const int count = min_t(unsigned int, connector_count, BITS_PER_LONG); 567 unsigned long conn_configured, conn_seq, mask; 568 struct drm_device *dev = client->dev; 569 int i, j; 570 bool *save_enabled; 571 bool fallback = true, ret = true; 572 int num_connectors_enabled = 0; 573 int num_connectors_detected = 0; 574 int num_tiled_conns = 0; 575 struct drm_modeset_acquire_ctx ctx; 576 577 if (!drm_drv_uses_atomic_modeset(dev)) 578 return false; 579 580 if (WARN_ON(count <= 0)) 581 return false; 582 583 save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL); 584 if (!save_enabled) 585 return false; 586 587 drm_modeset_acquire_init(&ctx, 0); 588 589 while (drm_modeset_lock_all_ctx(dev, &ctx) != 0) 590 drm_modeset_backoff(&ctx); 591 592 memcpy(save_enabled, enabled, count); 593 mask = GENMASK(count - 1, 0); 594 conn_configured = 0; 595 for (i = 0; i < count; i++) { 596 if (connectors[i]->has_tile && 597 connectors[i]->status == connector_status_connected) 598 num_tiled_conns++; 599 } 600 retry: 601 conn_seq = conn_configured; 602 for (i = 0; i < count; i++) { 603 struct drm_connector *connector; 604 struct drm_encoder *encoder; 605 struct drm_crtc *new_crtc; 606 607 connector = connectors[i]; 608 609 if (conn_configured & BIT(i)) 610 continue; 611 612 if (conn_seq == 0 && !connector->has_tile) 613 continue; 614 615 if (connector->status == connector_status_connected) 616 num_connectors_detected++; 617 618 if (!enabled[i]) { 619 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 620 connector->name); 621 conn_configured |= BIT(i); 622 continue; 623 } 624 625 if (connector->force == DRM_FORCE_OFF) { 626 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", 627 connector->name); 628 enabled[i] = false; 629 continue; 630 } 631 632 encoder = connector->state->best_encoder; 633 if (!encoder || WARN_ON(!connector->state->crtc)) { 634 if (connector->force > DRM_FORCE_OFF) 635 goto bail; 636 637 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 638 connector->name); 639 enabled[i] = false; 640 conn_configured |= BIT(i); 641 continue; 642 } 643 644 num_connectors_enabled++; 645 646 new_crtc = connector->state->crtc; 647 648 /* 649 * Make sure we're not trying to drive multiple connectors 650 * with a single CRTC, since our cloning support may not 651 * match the BIOS. 652 */ 653 for (j = 0; j < count; j++) { 654 if (crtcs[j] == new_crtc) { 655 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 656 goto bail; 657 } 658 } 659 660 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 661 connector->name); 662 663 /* go for command line mode first */ 664 modes[i] = drm_connector_pick_cmdline_mode(connector); 665 666 /* try for preferred next */ 667 if (!modes[i]) { 668 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", 669 connector->name, connector->has_tile); 670 modes[i] = drm_connector_has_preferred_mode(connector, width, height); 671 } 672 673 /* No preferred mode marked by the EDID? Are there any modes? */ 674 if (!modes[i] && !list_empty(&connector->modes)) { 675 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 676 connector->name); 677 modes[i] = list_first_entry(&connector->modes, 678 struct drm_display_mode, 679 head); 680 } 681 682 /* last resort: use current mode */ 683 if (!modes[i]) { 684 /* 685 * IMPORTANT: We want to use the adjusted mode (i.e. 686 * after the panel fitter upscaling) as the initial 687 * config, not the input mode, which is what crtc->mode 688 * usually contains. But since our current 689 * code puts a mode derived from the post-pfit timings 690 * into crtc->mode this works out correctly. 691 * 692 * This is crtc->mode and not crtc->state->mode for the 693 * fastboot check to work correctly. 694 */ 695 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 696 connector->name); 697 modes[i] = &connector->state->crtc->mode; 698 } 699 /* 700 * In case of tiled modes, if all tiles are not present 701 * then fallback to a non tiled mode. 702 */ 703 if (connector->has_tile && 704 num_tiled_conns < connector->num_h_tile * connector->num_v_tile) { 705 DRM_DEBUG_KMS("Falling back to non tiled mode on Connector %d\n", 706 connector->base.id); 707 modes[i] = drm_connector_fallback_non_tiled_mode(connector); 708 } 709 crtcs[i] = new_crtc; 710 711 DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n", 712 connector->name, 713 connector->state->crtc->base.id, 714 connector->state->crtc->name, 715 modes[i]->hdisplay, modes[i]->vdisplay, 716 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" : ""); 717 718 fallback = false; 719 conn_configured |= BIT(i); 720 } 721 722 if ((conn_configured & mask) != mask && conn_configured != conn_seq) 723 goto retry; 724 725 /* 726 * If the BIOS didn't enable everything it could, fall back to have the 727 * same user experiencing of lighting up as much as possible like the 728 * fbdev helper library. 729 */ 730 if (num_connectors_enabled != num_connectors_detected && 731 num_connectors_enabled < dev->mode_config.num_crtc) { 732 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); 733 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, 734 num_connectors_detected); 735 fallback = true; 736 } 737 738 if (fallback) { 739 bail: 740 DRM_DEBUG_KMS("Not using firmware configuration\n"); 741 memcpy(enabled, save_enabled, count); 742 ret = false; 743 } 744 745 drm_modeset_drop_locks(&ctx); 746 drm_modeset_acquire_fini(&ctx); 747 748 kfree(save_enabled); 749 return ret; 750 } 751 752 /** 753 * drm_client_modeset_probe() - Probe for displays 754 * @client: DRM client 755 * @width: Maximum display mode width (optional) 756 * @height: Maximum display mode height (optional) 757 * 758 * This function sets up display pipelines for enabled connectors and stores the 759 * config in the client's modeset array. 760 * 761 * Returns: 762 * Zero on success or negative error code on failure. 763 */ 764 int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height) 765 { 766 struct drm_connector *connector, **connectors = NULL; 767 struct drm_connector_list_iter conn_iter; 768 struct drm_device *dev = client->dev; 769 unsigned int total_modes_count = 0; 770 struct drm_client_offset *offsets; 771 unsigned int connector_count = 0; 772 struct drm_display_mode **modes; 773 struct drm_crtc **crtcs; 774 int i, ret = 0; 775 bool *enabled; 776 777 DRM_DEBUG_KMS("\n"); 778 779 if (!width) 780 width = dev->mode_config.max_width; 781 if (!height) 782 height = dev->mode_config.max_height; 783 784 drm_connector_list_iter_begin(dev, &conn_iter); 785 drm_client_for_each_connector_iter(connector, &conn_iter) { 786 struct drm_connector **tmp; 787 788 tmp = krealloc(connectors, (connector_count + 1) * sizeof(*connectors), GFP_KERNEL); 789 if (!tmp) { 790 ret = -ENOMEM; 791 goto free_connectors; 792 } 793 794 connectors = tmp; 795 drm_connector_get(connector); 796 connectors[connector_count++] = connector; 797 } 798 drm_connector_list_iter_end(&conn_iter); 799 800 if (!connector_count) 801 return 0; 802 803 crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); 804 modes = kcalloc(connector_count, sizeof(*modes), GFP_KERNEL); 805 offsets = kcalloc(connector_count, sizeof(*offsets), GFP_KERNEL); 806 enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL); 807 if (!crtcs || !modes || !enabled || !offsets) { 808 DRM_ERROR("Memory allocation failed\n"); 809 ret = -ENOMEM; 810 goto out; 811 } 812 813 mutex_lock(&client->modeset_mutex); 814 815 mutex_lock(&dev->mode_config.mutex); 816 for (i = 0; i < connector_count; i++) 817 total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height); 818 if (!total_modes_count) 819 DRM_DEBUG_KMS("No connectors reported connected with modes\n"); 820 drm_client_connectors_enabled(connectors, connector_count, enabled); 821 822 if (!drm_client_firmware_config(client, connectors, connector_count, crtcs, 823 modes, offsets, enabled, width, height)) { 824 memset(modes, 0, connector_count * sizeof(*modes)); 825 memset(crtcs, 0, connector_count * sizeof(*crtcs)); 826 memset(offsets, 0, connector_count * sizeof(*offsets)); 827 828 if (!drm_client_target_cloned(dev, connectors, connector_count, modes, 829 offsets, enabled, width, height) && 830 !drm_client_target_preferred(connectors, connector_count, modes, 831 offsets, enabled, width, height)) 832 DRM_ERROR("Unable to find initial modes\n"); 833 834 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", 835 width, height); 836 837 drm_client_pick_crtcs(client, connectors, connector_count, 838 crtcs, modes, 0, width, height); 839 } 840 mutex_unlock(&dev->mode_config.mutex); 841 842 drm_client_modeset_release(client); 843 844 for (i = 0; i < connector_count; i++) { 845 struct drm_display_mode *mode = modes[i]; 846 struct drm_crtc *crtc = crtcs[i]; 847 struct drm_client_offset *offset = &offsets[i]; 848 849 if (mode && crtc) { 850 struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc); 851 struct drm_connector *connector = connectors[i]; 852 853 DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", 854 mode->name, crtc->base.id, offset->x, offset->y); 855 856 if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS || 857 (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) { 858 ret = -EINVAL; 859 break; 860 } 861 862 modeset->mode = drm_mode_duplicate(dev, mode); 863 drm_connector_get(connector); 864 modeset->connectors[modeset->num_connectors++] = connector; 865 modeset->x = offset->x; 866 modeset->y = offset->y; 867 } 868 } 869 870 mutex_unlock(&client->modeset_mutex); 871 out: 872 kfree(crtcs); 873 kfree(modes); 874 kfree(offsets); 875 kfree(enabled); 876 free_connectors: 877 for (i = 0; i < connector_count; i++) 878 drm_connector_put(connectors[i]); 879 kfree(connectors); 880 881 return ret; 882 } 883 EXPORT_SYMBOL(drm_client_modeset_probe); 884 885 /** 886 * drm_client_rotation() - Check the initial rotation value 887 * @modeset: DRM modeset 888 * @rotation: Returned rotation value 889 * 890 * This function checks if the primary plane in @modeset can hw rotate 891 * to match the rotation needed on its connector. 892 * 893 * Note: Currently only 0 and 180 degrees are supported. 894 * 895 * Return: 896 * True if the plane can do the rotation, false otherwise. 897 */ 898 bool drm_client_rotation(struct drm_mode_set *modeset, unsigned int *rotation) 899 { 900 struct drm_connector *connector = modeset->connectors[0]; 901 struct drm_plane *plane = modeset->crtc->primary; 902 struct drm_cmdline_mode *cmdline; 903 u64 valid_mask = 0; 904 unsigned int i; 905 906 if (!modeset->num_connectors) 907 return false; 908 909 switch (connector->display_info.panel_orientation) { 910 case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: 911 *rotation = DRM_MODE_ROTATE_180; 912 break; 913 case DRM_MODE_PANEL_ORIENTATION_LEFT_UP: 914 *rotation = DRM_MODE_ROTATE_90; 915 break; 916 case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: 917 *rotation = DRM_MODE_ROTATE_270; 918 break; 919 default: 920 *rotation = DRM_MODE_ROTATE_0; 921 } 922 923 /** 924 * The panel already defined the default rotation 925 * through its orientation. Whatever has been provided 926 * on the command line needs to be added to that. 927 * 928 * Unfortunately, the rotations are at different bit 929 * indices, so the math to add them up are not as 930 * trivial as they could. 931 * 932 * Reflections on the other hand are pretty trivial to deal with, a 933 * simple XOR between the two handle the addition nicely. 934 */ 935 cmdline = &connector->cmdline_mode; 936 if (cmdline->specified && cmdline->rotation_reflection) { 937 unsigned int cmdline_rest, panel_rest; 938 unsigned int cmdline_rot, panel_rot; 939 unsigned int sum_rot, sum_rest; 940 941 panel_rot = ilog2(*rotation & DRM_MODE_ROTATE_MASK); 942 cmdline_rot = ilog2(cmdline->rotation_reflection & DRM_MODE_ROTATE_MASK); 943 sum_rot = (panel_rot + cmdline_rot) % 4; 944 945 panel_rest = *rotation & ~DRM_MODE_ROTATE_MASK; 946 cmdline_rest = cmdline->rotation_reflection & ~DRM_MODE_ROTATE_MASK; 947 sum_rest = panel_rest ^ cmdline_rest; 948 949 *rotation = (1 << sum_rot) | sum_rest; 950 } 951 952 /* 953 * TODO: support 90 / 270 degree hardware rotation, 954 * depending on the hardware this may require the framebuffer 955 * to be in a specific tiling format. 956 */ 957 if (((*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_0 && 958 (*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_180) || 959 !plane->rotation_property) 960 return false; 961 962 for (i = 0; i < plane->rotation_property->num_values; i++) 963 valid_mask |= (1ULL << plane->rotation_property->values[i]); 964 965 if (!(*rotation & valid_mask)) 966 return false; 967 968 return true; 969 } 970 EXPORT_SYMBOL(drm_client_rotation); 971 972 static int drm_client_modeset_commit_atomic(struct drm_client_dev *client, bool active, bool check) 973 { 974 struct drm_device *dev = client->dev; 975 struct drm_plane *plane; 976 struct drm_atomic_state *state; 977 struct drm_modeset_acquire_ctx ctx; 978 struct drm_mode_set *mode_set; 979 int ret; 980 981 drm_modeset_acquire_init(&ctx, 0); 982 983 state = drm_atomic_state_alloc(dev); 984 if (!state) { 985 ret = -ENOMEM; 986 goto out_ctx; 987 } 988 989 state->acquire_ctx = &ctx; 990 retry: 991 drm_for_each_plane(plane, dev) { 992 struct drm_plane_state *plane_state; 993 994 plane_state = drm_atomic_get_plane_state(state, plane); 995 if (IS_ERR(plane_state)) { 996 ret = PTR_ERR(plane_state); 997 goto out_state; 998 } 999 1000 plane_state->rotation = DRM_MODE_ROTATE_0; 1001 1002 /* disable non-primary: */ 1003 if (plane->type == DRM_PLANE_TYPE_PRIMARY) 1004 continue; 1005 1006 ret = __drm_atomic_helper_disable_plane(plane, plane_state); 1007 if (ret != 0) 1008 goto out_state; 1009 } 1010 1011 drm_client_for_each_modeset(mode_set, client) { 1012 struct drm_plane *primary = mode_set->crtc->primary; 1013 unsigned int rotation; 1014 1015 if (drm_client_rotation(mode_set, &rotation)) { 1016 struct drm_plane_state *plane_state; 1017 1018 /* Cannot fail as we've already gotten the plane state above */ 1019 plane_state = drm_atomic_get_new_plane_state(state, primary); 1020 plane_state->rotation = rotation; 1021 } 1022 1023 ret = __drm_atomic_helper_set_config(mode_set, state); 1024 if (ret != 0) 1025 goto out_state; 1026 1027 /* 1028 * __drm_atomic_helper_set_config() sets active when a 1029 * mode is set, unconditionally clear it if we force DPMS off 1030 */ 1031 if (!active) { 1032 struct drm_crtc *crtc = mode_set->crtc; 1033 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc); 1034 1035 crtc_state->active = false; 1036 } 1037 } 1038 1039 if (check) 1040 ret = drm_atomic_check_only(state); 1041 else 1042 ret = drm_atomic_commit(state); 1043 1044 out_state: 1045 if (ret == -EDEADLK) 1046 goto backoff; 1047 1048 drm_atomic_state_put(state); 1049 out_ctx: 1050 drm_modeset_drop_locks(&ctx); 1051 drm_modeset_acquire_fini(&ctx); 1052 1053 return ret; 1054 1055 backoff: 1056 drm_atomic_state_clear(state); 1057 drm_modeset_backoff(&ctx); 1058 1059 goto retry; 1060 } 1061 1062 static int drm_client_modeset_commit_legacy(struct drm_client_dev *client) 1063 { 1064 struct drm_device *dev = client->dev; 1065 struct drm_mode_set *mode_set; 1066 struct drm_plane *plane; 1067 int ret = 0; 1068 1069 drm_modeset_lock_all(dev); 1070 drm_for_each_plane(plane, dev) { 1071 if (plane->type != DRM_PLANE_TYPE_PRIMARY) 1072 drm_plane_force_disable(plane); 1073 1074 if (plane->rotation_property) 1075 drm_mode_plane_set_obj_prop(plane, 1076 plane->rotation_property, 1077 DRM_MODE_ROTATE_0); 1078 } 1079 1080 drm_client_for_each_modeset(mode_set, client) { 1081 struct drm_crtc *crtc = mode_set->crtc; 1082 1083 if (crtc->funcs->cursor_set2) { 1084 ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); 1085 if (ret) 1086 goto out; 1087 } else if (crtc->funcs->cursor_set) { 1088 ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); 1089 if (ret) 1090 goto out; 1091 } 1092 1093 ret = drm_mode_set_config_internal(mode_set); 1094 if (ret) 1095 goto out; 1096 } 1097 out: 1098 drm_modeset_unlock_all(dev); 1099 1100 return ret; 1101 } 1102 1103 /** 1104 * drm_client_modeset_check() - Check modeset configuration 1105 * @client: DRM client 1106 * 1107 * Check modeset configuration. 1108 * 1109 * Returns: 1110 * Zero on success or negative error code on failure. 1111 */ 1112 int drm_client_modeset_check(struct drm_client_dev *client) 1113 { 1114 int ret; 1115 1116 if (!drm_drv_uses_atomic_modeset(client->dev)) 1117 return 0; 1118 1119 mutex_lock(&client->modeset_mutex); 1120 ret = drm_client_modeset_commit_atomic(client, true, true); 1121 mutex_unlock(&client->modeset_mutex); 1122 1123 return ret; 1124 } 1125 EXPORT_SYMBOL(drm_client_modeset_check); 1126 1127 /** 1128 * drm_client_modeset_commit_locked() - Force commit CRTC configuration 1129 * @client: DRM client 1130 * 1131 * Commit modeset configuration to crtcs without checking if there is a DRM 1132 * master. The assumption is that the caller already holds an internal DRM 1133 * master reference acquired with drm_master_internal_acquire(). 1134 * 1135 * Returns: 1136 * Zero on success or negative error code on failure. 1137 */ 1138 int drm_client_modeset_commit_locked(struct drm_client_dev *client) 1139 { 1140 struct drm_device *dev = client->dev; 1141 int ret; 1142 1143 mutex_lock(&client->modeset_mutex); 1144 if (drm_drv_uses_atomic_modeset(dev)) 1145 ret = drm_client_modeset_commit_atomic(client, true, false); 1146 else 1147 ret = drm_client_modeset_commit_legacy(client); 1148 mutex_unlock(&client->modeset_mutex); 1149 1150 return ret; 1151 } 1152 EXPORT_SYMBOL(drm_client_modeset_commit_locked); 1153 1154 /** 1155 * drm_client_modeset_commit() - Commit CRTC configuration 1156 * @client: DRM client 1157 * 1158 * Commit modeset configuration to crtcs. 1159 * 1160 * Returns: 1161 * Zero on success or negative error code on failure. 1162 */ 1163 int drm_client_modeset_commit(struct drm_client_dev *client) 1164 { 1165 struct drm_device *dev = client->dev; 1166 int ret; 1167 1168 if (!drm_master_internal_acquire(dev)) 1169 return -EBUSY; 1170 1171 ret = drm_client_modeset_commit_locked(client); 1172 1173 drm_master_internal_release(dev); 1174 1175 return ret; 1176 } 1177 EXPORT_SYMBOL(drm_client_modeset_commit); 1178 1179 static void drm_client_modeset_dpms_legacy(struct drm_client_dev *client, int dpms_mode) 1180 { 1181 struct drm_device *dev = client->dev; 1182 struct drm_connector *connector; 1183 struct drm_mode_set *modeset; 1184 int j; 1185 1186 drm_modeset_lock_all(dev); 1187 drm_client_for_each_modeset(modeset, client) { 1188 if (!modeset->crtc->enabled) 1189 continue; 1190 1191 for (j = 0; j < modeset->num_connectors; j++) { 1192 connector = modeset->connectors[j]; 1193 connector->funcs->dpms(connector, dpms_mode); 1194 drm_object_property_set_value(&connector->base, 1195 dev->mode_config.dpms_property, dpms_mode); 1196 } 1197 } 1198 drm_modeset_unlock_all(dev); 1199 } 1200 1201 /** 1202 * drm_client_modeset_dpms() - Set DPMS mode 1203 * @client: DRM client 1204 * @mode: DPMS mode 1205 * 1206 * Note: For atomic drivers @mode is reduced to on/off. 1207 * 1208 * Returns: 1209 * Zero on success or negative error code on failure. 1210 */ 1211 int drm_client_modeset_dpms(struct drm_client_dev *client, int mode) 1212 { 1213 struct drm_device *dev = client->dev; 1214 int ret = 0; 1215 1216 if (!drm_master_internal_acquire(dev)) 1217 return -EBUSY; 1218 1219 mutex_lock(&client->modeset_mutex); 1220 if (drm_drv_uses_atomic_modeset(dev)) 1221 ret = drm_client_modeset_commit_atomic(client, mode == DRM_MODE_DPMS_ON, false); 1222 else 1223 drm_client_modeset_dpms_legacy(client, mode); 1224 mutex_unlock(&client->modeset_mutex); 1225 1226 drm_master_internal_release(dev); 1227 1228 return ret; 1229 } 1230 EXPORT_SYMBOL(drm_client_modeset_dpms); 1231