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 "drm/drm_modeset_lock.h" 11 #include <linux/module.h> 12 #include <linux/mutex.h> 13 #include <linux/slab.h> 14 #include <linux/string_helpers.h> 15 16 #include <drm/drm_atomic.h> 17 #include <drm/drm_client.h> 18 #include <drm/drm_connector.h> 19 #include <drm/drm_crtc.h> 20 #include <drm/drm_device.h> 21 #include <drm/drm_drv.h> 22 #include <drm/drm_edid.h> 23 #include <drm/drm_encoder.h> 24 #include <drm/drm_print.h> 25 26 #include "drm_crtc_internal.h" 27 #include "drm_internal.h" 28 29 #define DRM_CLIENT_MAX_CLONED_CONNECTORS 8 30 31 struct drm_client_offset { 32 int x, y; 33 }; 34 35 int drm_client_modeset_create(struct drm_client_dev *client) 36 { 37 struct drm_device *dev = client->dev; 38 unsigned int num_crtc = dev->mode_config.num_crtc; 39 unsigned int max_connector_count = 1; 40 struct drm_mode_set *modeset; 41 struct drm_crtc *crtc; 42 int i = 0; 43 44 /* Add terminating zero entry to enable index less iteration */ 45 client->modesets = kcalloc(num_crtc + 1, sizeof(*client->modesets), GFP_KERNEL); 46 if (!client->modesets) 47 return -ENOMEM; 48 49 mutex_init(&client->modeset_mutex); 50 51 drm_for_each_crtc(crtc, dev) 52 client->modesets[i++].crtc = crtc; 53 54 /* Cloning is only supported in the single crtc case. */ 55 if (num_crtc == 1) 56 max_connector_count = DRM_CLIENT_MAX_CLONED_CONNECTORS; 57 58 for (modeset = client->modesets; modeset->crtc; modeset++) { 59 modeset->connectors = kcalloc(max_connector_count, 60 sizeof(*modeset->connectors), GFP_KERNEL); 61 if (!modeset->connectors) 62 goto err_free; 63 } 64 65 return 0; 66 67 err_free: 68 drm_client_modeset_free(client); 69 70 return -ENOMEM; 71 } 72 73 static void drm_client_modeset_release(struct drm_client_dev *client) 74 { 75 struct drm_mode_set *modeset; 76 77 drm_client_for_each_modeset(modeset, client) { 78 int i; 79 80 drm_mode_destroy(client->dev, modeset->mode); 81 modeset->mode = NULL; 82 modeset->fb = NULL; 83 84 for (i = 0; i < modeset->num_connectors; i++) { 85 drm_connector_put(modeset->connectors[i]); 86 modeset->connectors[i] = NULL; 87 } 88 modeset->num_connectors = 0; 89 } 90 } 91 92 void drm_client_modeset_free(struct drm_client_dev *client) 93 { 94 struct drm_mode_set *modeset; 95 96 mutex_lock(&client->modeset_mutex); 97 98 drm_client_modeset_release(client); 99 100 drm_client_for_each_modeset(modeset, client) 101 kfree(modeset->connectors); 102 103 mutex_unlock(&client->modeset_mutex); 104 105 mutex_destroy(&client->modeset_mutex); 106 kfree(client->modesets); 107 } 108 109 static struct drm_mode_set * 110 drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc) 111 { 112 struct drm_mode_set *modeset; 113 114 drm_client_for_each_modeset(modeset, client) 115 if (modeset->crtc == crtc) 116 return modeset; 117 118 return NULL; 119 } 120 121 static const struct drm_display_mode * 122 drm_connector_get_tiled_mode(struct drm_connector *connector) 123 { 124 const struct drm_display_mode *mode; 125 126 list_for_each_entry(mode, &connector->modes, head) { 127 if (mode->hdisplay == connector->tile_h_size && 128 mode->vdisplay == connector->tile_v_size) 129 return mode; 130 } 131 return NULL; 132 } 133 134 static const struct drm_display_mode * 135 drm_connector_fallback_non_tiled_mode(struct drm_connector *connector) 136 { 137 const struct drm_display_mode *mode; 138 139 list_for_each_entry(mode, &connector->modes, head) { 140 if (mode->hdisplay == connector->tile_h_size && 141 mode->vdisplay == connector->tile_v_size) 142 continue; 143 return mode; 144 } 145 return NULL; 146 } 147 148 static const struct drm_display_mode * 149 drm_connector_preferred_mode(struct drm_connector *connector, int width, int height) 150 { 151 const struct drm_display_mode *mode; 152 153 list_for_each_entry(mode, &connector->modes, head) { 154 if (mode->hdisplay > width || 155 mode->vdisplay > height) 156 continue; 157 if (mode->type & DRM_MODE_TYPE_PREFERRED) 158 return mode; 159 } 160 return NULL; 161 } 162 163 static const struct drm_display_mode * 164 drm_connector_first_mode(struct drm_connector *connector) 165 { 166 return list_first_entry_or_null(&connector->modes, 167 struct drm_display_mode, head); 168 } 169 170 static const struct drm_display_mode * 171 drm_connector_pick_cmdline_mode(struct drm_connector *connector) 172 { 173 const struct drm_cmdline_mode *cmdline_mode; 174 const struct drm_display_mode *mode; 175 bool prefer_non_interlace; 176 177 /* 178 * Find a user-defined mode. If the user gave us a valid 179 * mode on the kernel command line, it will show up in this 180 * list. 181 */ 182 183 list_for_each_entry(mode, &connector->modes, head) { 184 if (mode->type & DRM_MODE_TYPE_USERDEF) 185 return mode; 186 } 187 188 cmdline_mode = &connector->cmdline_mode; 189 if (cmdline_mode->specified == false) 190 return NULL; 191 192 /* 193 * Attempt to find a matching mode in the list of modes we 194 * have gotten so far. 195 */ 196 197 prefer_non_interlace = !cmdline_mode->interlace; 198 again: 199 list_for_each_entry(mode, &connector->modes, head) { 200 /* check width/height */ 201 if (mode->hdisplay != cmdline_mode->xres || 202 mode->vdisplay != cmdline_mode->yres) 203 continue; 204 205 if (cmdline_mode->refresh_specified) { 206 if (drm_mode_vrefresh(mode) != cmdline_mode->refresh) 207 continue; 208 } 209 210 if (cmdline_mode->interlace) { 211 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) 212 continue; 213 } else if (prefer_non_interlace) { 214 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 215 continue; 216 } 217 return mode; 218 } 219 220 if (prefer_non_interlace) { 221 prefer_non_interlace = false; 222 goto again; 223 } 224 225 return NULL; 226 } 227 228 static bool drm_connector_enabled(struct drm_connector *connector, bool strict) 229 { 230 bool enable; 231 232 if (connector->display_info.non_desktop) 233 return false; 234 235 if (strict) 236 enable = connector->status == connector_status_connected; 237 else 238 enable = connector->status != connector_status_disconnected; 239 240 return enable; 241 } 242 243 static void drm_client_connectors_enabled(struct drm_connector *connectors[], 244 unsigned int connector_count, 245 bool enabled[]) 246 { 247 bool any_enabled = false; 248 struct drm_connector *connector; 249 int i = 0; 250 251 for (i = 0; i < connector_count; i++) { 252 connector = connectors[i]; 253 enabled[i] = drm_connector_enabled(connector, true); 254 drm_dbg_kms(connector->dev, "[CONNECTOR:%d:%s] enabled? %s\n", 255 connector->base.id, connector->name, 256 connector->display_info.non_desktop ? 257 "non desktop" : str_yes_no(enabled[i])); 258 259 any_enabled |= enabled[i]; 260 } 261 262 if (any_enabled) 263 return; 264 265 for (i = 0; i < connector_count; i++) 266 enabled[i] = drm_connector_enabled(connectors[i], false); 267 } 268 269 static void mode_replace(struct drm_device *dev, 270 const struct drm_display_mode **dst, 271 const struct drm_display_mode *src) 272 { 273 drm_mode_destroy(dev, (struct drm_display_mode *)*dst); 274 275 *dst = src ? drm_mode_duplicate(dev, src) : NULL; 276 } 277 278 static void modes_destroy(struct drm_device *dev, 279 const struct drm_display_mode *modes[], 280 int count) 281 { 282 int i; 283 284 for (i = 0; i < count; i++) 285 mode_replace(dev, &modes[i], NULL); 286 } 287 288 static bool drm_client_target_cloned(struct drm_device *dev, 289 struct drm_connector *connectors[], 290 unsigned int connector_count, 291 const struct drm_display_mode *modes[], 292 struct drm_client_offset offsets[], 293 bool enabled[], int width, int height) 294 { 295 int count, i; 296 bool can_clone = false; 297 struct drm_display_mode *dmt_mode; 298 299 /* only contemplate cloning in the single crtc case */ 300 if (dev->mode_config.num_crtc > 1) 301 return false; 302 303 count = 0; 304 for (i = 0; i < connector_count; i++) { 305 if (enabled[i]) 306 count++; 307 } 308 309 /* only contemplate cloning if more than one connector is enabled */ 310 if (count <= 1) 311 return false; 312 313 /* check the command line or if nothing common pick 1024x768 */ 314 can_clone = true; 315 for (i = 0; i < connector_count; i++) { 316 int j; 317 318 if (!enabled[i]) 319 continue; 320 321 mode_replace(dev, &modes[i], 322 drm_connector_pick_cmdline_mode(connectors[i])); 323 if (!modes[i]) { 324 can_clone = false; 325 break; 326 } 327 for (j = 0; j < i; j++) { 328 if (!enabled[j]) 329 continue; 330 if (!drm_mode_match(modes[j], modes[i], 331 DRM_MODE_MATCH_TIMINGS | 332 DRM_MODE_MATCH_CLOCK | 333 DRM_MODE_MATCH_FLAGS | 334 DRM_MODE_MATCH_3D_FLAGS)) 335 can_clone = false; 336 } 337 } 338 339 if (can_clone) { 340 drm_dbg_kms(dev, "can clone using command line\n"); 341 return true; 342 } 343 344 /* try and find a 1024x768 mode on each connector */ 345 can_clone = true; 346 dmt_mode = drm_mode_find_dmt(dev, 1024, 768, 60, false); 347 348 if (!dmt_mode) 349 goto fail; 350 351 for (i = 0; i < connector_count; i++) { 352 const struct drm_display_mode *mode; 353 354 if (!enabled[i]) 355 continue; 356 357 list_for_each_entry(mode, &connectors[i]->modes, head) { 358 if (drm_mode_match(mode, dmt_mode, 359 DRM_MODE_MATCH_TIMINGS | 360 DRM_MODE_MATCH_CLOCK | 361 DRM_MODE_MATCH_FLAGS | 362 DRM_MODE_MATCH_3D_FLAGS)) 363 mode_replace(dev, &modes[i], mode); 364 } 365 if (!modes[i]) 366 can_clone = false; 367 } 368 drm_mode_destroy(dev, dmt_mode); 369 370 if (can_clone) { 371 drm_dbg_kms(dev, "can clone using 1024x768\n"); 372 return true; 373 } 374 fail: 375 drm_info(dev, "kms: can't enable cloning when we probably wanted to.\n"); 376 return false; 377 } 378 379 static int drm_client_get_tile_offsets(struct drm_device *dev, 380 struct drm_connector *connectors[], 381 unsigned int connector_count, 382 const struct drm_display_mode *modes[], 383 struct drm_client_offset offsets[], 384 int idx, 385 int h_idx, int v_idx) 386 { 387 int i; 388 int hoffset = 0, voffset = 0; 389 390 for (i = 0; i < connector_count; i++) { 391 struct drm_connector *connector = connectors[i]; 392 393 if (!connector->has_tile) 394 continue; 395 396 if (!modes[i] && (h_idx || v_idx)) { 397 drm_dbg_kms(dev, 398 "[CONNECTOR:%d:%s] no modes for connector tiled %d\n", 399 connector->base.id, connector->name, i); 400 continue; 401 } 402 if (connector->tile_h_loc < h_idx) 403 hoffset += modes[i]->hdisplay; 404 405 if (connector->tile_v_loc < v_idx) 406 voffset += modes[i]->vdisplay; 407 } 408 offsets[idx].x = hoffset; 409 offsets[idx].y = voffset; 410 drm_dbg_kms(dev, "returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); 411 return 0; 412 } 413 414 static bool drm_client_target_preferred(struct drm_device *dev, 415 struct drm_connector *connectors[], 416 unsigned int connector_count, 417 const struct drm_display_mode *modes[], 418 struct drm_client_offset offsets[], 419 bool enabled[], int width, int height) 420 { 421 const u64 mask = BIT_ULL(connector_count) - 1; 422 u64 conn_configured = 0; 423 int tile_pass = 0; 424 int num_tiled_conns = 0; 425 int i; 426 427 for (i = 0; i < connector_count; i++) { 428 if (connectors[i]->has_tile && 429 connectors[i]->status == connector_status_connected) 430 num_tiled_conns++; 431 } 432 433 retry: 434 for (i = 0; i < connector_count; i++) { 435 struct drm_connector *connector = connectors[i]; 436 const char *mode_type; 437 438 439 if (conn_configured & BIT_ULL(i)) 440 continue; 441 442 if (enabled[i] == false) { 443 conn_configured |= BIT_ULL(i); 444 continue; 445 } 446 447 /* first pass over all the untiled connectors */ 448 if (tile_pass == 0 && connector->has_tile) 449 continue; 450 451 if (tile_pass == 1) { 452 if (connector->tile_h_loc != 0 || 453 connector->tile_v_loc != 0) 454 continue; 455 456 } else { 457 if (connector->tile_h_loc != tile_pass - 1 && 458 connector->tile_v_loc != tile_pass - 1) 459 /* if this tile_pass doesn't cover any of the tiles - keep going */ 460 continue; 461 462 /* 463 * find the tile offsets for this pass - need to find 464 * all tiles left and above 465 */ 466 drm_client_get_tile_offsets(dev, connectors, connector_count, 467 modes, offsets, i, 468 connector->tile_h_loc, connector->tile_v_loc); 469 } 470 471 mode_type = "cmdline"; 472 mode_replace(dev, &modes[i], 473 drm_connector_pick_cmdline_mode(connector)); 474 475 if (!modes[i]) { 476 mode_type = "preferred"; 477 mode_replace(dev, &modes[i], 478 drm_connector_preferred_mode(connector, width, height)); 479 } 480 481 if (!modes[i]) { 482 mode_type = "first"; 483 mode_replace(dev, &modes[i], 484 drm_connector_first_mode(connector)); 485 } 486 487 /* 488 * In case of tiled mode if all tiles not present fallback to 489 * first available non tiled mode. 490 * After all tiles are present, try to find the tiled mode 491 * for all and if tiled mode not present due to fbcon size 492 * limitations, use first non tiled mode only for 493 * tile 0,0 and set to no mode for all other tiles. 494 */ 495 if (connector->has_tile) { 496 if (num_tiled_conns < 497 connector->num_h_tile * connector->num_v_tile || 498 (connector->tile_h_loc == 0 && 499 connector->tile_v_loc == 0 && 500 !drm_connector_get_tiled_mode(connector))) { 501 mode_type = "non tiled"; 502 mode_replace(dev, &modes[i], 503 drm_connector_fallback_non_tiled_mode(connector)); 504 } else { 505 mode_type = "tiled"; 506 mode_replace(dev, &modes[i], 507 drm_connector_get_tiled_mode(connector)); 508 } 509 } 510 511 if (modes[i]) 512 drm_dbg_kms(dev, "[CONNECTOR:%d:%s] found %s mode: %s\n", 513 connector->base.id, connector->name, 514 mode_type, modes[i]->name); 515 else 516 drm_dbg_kms(dev, "[CONNECTOR:%d:%s] no mode found\n", 517 connector->base.id, connector->name); 518 519 conn_configured |= BIT_ULL(i); 520 } 521 522 if ((conn_configured & mask) != mask) { 523 tile_pass++; 524 goto retry; 525 } 526 return true; 527 } 528 529 static bool connector_has_possible_crtc(struct drm_connector *connector, 530 struct drm_crtc *crtc) 531 { 532 struct drm_encoder *encoder; 533 534 drm_connector_for_each_possible_encoder(connector, encoder) { 535 if (encoder->possible_crtcs & drm_crtc_mask(crtc)) 536 return true; 537 } 538 539 return false; 540 } 541 542 static int drm_client_pick_crtcs(struct drm_client_dev *client, 543 struct drm_connector *connectors[], 544 unsigned int connector_count, 545 struct drm_crtc *best_crtcs[], 546 const struct drm_display_mode *modes[], 547 int n, int width, int height) 548 { 549 struct drm_device *dev = client->dev; 550 struct drm_connector *connector; 551 int my_score, best_score, score; 552 struct drm_crtc **crtcs; 553 struct drm_mode_set *modeset; 554 555 if (n == connector_count) 556 return 0; 557 558 connector = connectors[n]; 559 560 best_crtcs[n] = NULL; 561 best_score = drm_client_pick_crtcs(client, connectors, connector_count, 562 best_crtcs, modes, n + 1, width, height); 563 if (modes[n] == NULL) 564 return best_score; 565 566 crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); 567 if (!crtcs) 568 return best_score; 569 570 my_score = 1; 571 if (connector->status == connector_status_connected) 572 my_score++; 573 if (connector->cmdline_mode.specified) 574 my_score++; 575 if (drm_connector_preferred_mode(connector, width, height)) 576 my_score++; 577 578 /* 579 * select a crtc for this connector and then attempt to configure 580 * remaining connectors 581 */ 582 drm_client_for_each_modeset(modeset, client) { 583 struct drm_crtc *crtc = modeset->crtc; 584 int o; 585 586 if (!connector_has_possible_crtc(connector, crtc)) 587 continue; 588 589 for (o = 0; o < n; o++) 590 if (best_crtcs[o] == crtc) 591 break; 592 593 if (o < n) { 594 /* ignore cloning unless only a single crtc */ 595 if (dev->mode_config.num_crtc > 1) 596 continue; 597 598 if (!drm_mode_equal(modes[o], modes[n])) 599 continue; 600 } 601 602 crtcs[n] = crtc; 603 memcpy(crtcs, best_crtcs, n * sizeof(*crtcs)); 604 score = my_score + drm_client_pick_crtcs(client, connectors, connector_count, 605 crtcs, modes, n + 1, width, height); 606 if (score > best_score) { 607 best_score = score; 608 memcpy(best_crtcs, crtcs, connector_count * sizeof(*crtcs)); 609 } 610 } 611 612 kfree(crtcs); 613 return best_score; 614 } 615 616 /* Try to read the BIOS display configuration and use it for the initial config */ 617 static bool drm_client_firmware_config(struct drm_client_dev *client, 618 struct drm_connector *connectors[], 619 unsigned int connector_count, 620 struct drm_crtc *crtcs[], 621 const struct drm_display_mode *modes[], 622 struct drm_client_offset offsets[], 623 bool enabled[], int width, int height) 624 { 625 const int count = min_t(unsigned int, connector_count, BITS_PER_LONG); 626 unsigned long conn_configured, conn_seq, mask; 627 struct drm_device *dev = client->dev; 628 int i; 629 bool *save_enabled; 630 bool fallback = true, ret = true; 631 int num_connectors_enabled = 0; 632 int num_connectors_detected = 0; 633 int num_tiled_conns = 0; 634 struct drm_modeset_acquire_ctx ctx; 635 636 if (!drm_drv_uses_atomic_modeset(dev)) 637 return false; 638 639 if (drm_WARN_ON(dev, count <= 0)) 640 return false; 641 642 save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL); 643 if (!save_enabled) 644 return false; 645 646 drm_modeset_acquire_init(&ctx, 0); 647 648 while (drm_modeset_lock_all_ctx(dev, &ctx) != 0) 649 drm_modeset_backoff(&ctx); 650 651 memcpy(save_enabled, enabled, count); 652 mask = GENMASK(count - 1, 0); 653 conn_configured = 0; 654 for (i = 0; i < count; i++) { 655 if (connectors[i]->has_tile && 656 connectors[i]->status == connector_status_connected) 657 num_tiled_conns++; 658 } 659 retry: 660 conn_seq = conn_configured; 661 for (i = 0; i < count; i++) { 662 struct drm_connector *connector = connectors[i]; 663 struct drm_encoder *encoder; 664 struct drm_crtc *crtc; 665 const char *mode_type; 666 int j; 667 668 if (conn_configured & BIT(i)) 669 continue; 670 671 if (conn_seq == 0 && !connector->has_tile) 672 continue; 673 674 if (connector->status == connector_status_connected) 675 num_connectors_detected++; 676 677 if (!enabled[i]) { 678 drm_dbg_kms(dev, "[CONNECTOR:%d:%s] not enabled, skipping\n", 679 connector->base.id, connector->name); 680 conn_configured |= BIT(i); 681 continue; 682 } 683 684 if (connector->force == DRM_FORCE_OFF) { 685 drm_dbg_kms(dev, "[CONNECTOR:%d:%s] disabled by user, skipping\n", 686 connector->base.id, connector->name); 687 enabled[i] = false; 688 continue; 689 } 690 691 encoder = connector->state->best_encoder; 692 if (!encoder || drm_WARN_ON(dev, !connector->state->crtc)) { 693 if (connector->force > DRM_FORCE_OFF) 694 goto bail; 695 696 drm_dbg_kms(dev, "[CONNECTOR:%d:%s] has no encoder or crtc, skipping\n", 697 connector->base.id, connector->name); 698 enabled[i] = false; 699 conn_configured |= BIT(i); 700 continue; 701 } 702 703 num_connectors_enabled++; 704 705 crtc = connector->state->crtc; 706 707 /* 708 * Make sure we're not trying to drive multiple connectors 709 * with a single CRTC, since our cloning support may not 710 * match the BIOS. 711 */ 712 for (j = 0; j < count; j++) { 713 if (crtcs[j] == crtc) { 714 drm_dbg_kms(dev, "[CONNECTOR:%d:%s] fallback: cloned configuration\n", 715 connector->base.id, connector->name); 716 goto bail; 717 } 718 } 719 720 mode_type = "cmdline"; 721 mode_replace(dev, &modes[i], 722 drm_connector_pick_cmdline_mode(connector)); 723 724 if (!modes[i]) { 725 mode_type = "preferred"; 726 mode_replace(dev, &modes[i], 727 drm_connector_preferred_mode(connector, width, height)); 728 } 729 730 if (!modes[i]) { 731 mode_type = "first"; 732 mode_replace(dev, &modes[i], 733 drm_connector_first_mode(connector)); 734 } 735 736 /* last resort: use current mode */ 737 if (!modes[i]) { 738 mode_type = "current"; 739 mode_replace(dev, &modes[i], 740 &crtc->state->mode); 741 } 742 743 /* 744 * In case of tiled modes, if all tiles are not present 745 * then fallback to a non tiled mode. 746 */ 747 if (connector->has_tile && 748 num_tiled_conns < connector->num_h_tile * connector->num_v_tile) { 749 mode_type = "non tiled"; 750 mode_replace(dev, &modes[i], 751 drm_connector_fallback_non_tiled_mode(connector)); 752 } 753 crtcs[i] = crtc; 754 755 drm_dbg_kms(dev, "[CONNECTOR::%d:%s] on [CRTC:%d:%s] using %s mode: %s\n", 756 connector->base.id, connector->name, 757 crtc->base.id, crtc->name, 758 mode_type, modes[i]->name); 759 760 fallback = false; 761 conn_configured |= BIT(i); 762 } 763 764 if ((conn_configured & mask) != mask && conn_configured != conn_seq) 765 goto retry; 766 767 for (i = 0; i < count; i++) { 768 struct drm_connector *connector = connectors[i]; 769 770 if (connector->has_tile) 771 drm_client_get_tile_offsets(dev, connectors, connector_count, 772 modes, offsets, i, 773 connector->tile_h_loc, connector->tile_v_loc); 774 } 775 776 /* 777 * If the BIOS didn't enable everything it could, fall back to have the 778 * same user experiencing of lighting up as much as possible like the 779 * fbdev helper library. 780 */ 781 if (num_connectors_enabled != num_connectors_detected && 782 num_connectors_enabled < dev->mode_config.num_crtc) { 783 drm_dbg_kms(dev, "fallback: Not all outputs enabled\n"); 784 drm_dbg_kms(dev, "Enabled: %i, detected: %i\n", 785 num_connectors_enabled, num_connectors_detected); 786 fallback = true; 787 } 788 789 if (fallback) { 790 bail: 791 drm_dbg_kms(dev, "Not using firmware configuration\n"); 792 memcpy(enabled, save_enabled, count); 793 ret = false; 794 } 795 796 drm_modeset_drop_locks(&ctx); 797 drm_modeset_acquire_fini(&ctx); 798 799 kfree(save_enabled); 800 return ret; 801 } 802 803 /** 804 * drm_client_modeset_probe() - Probe for displays 805 * @client: DRM client 806 * @width: Maximum display mode width (optional) 807 * @height: Maximum display mode height (optional) 808 * 809 * This function sets up display pipelines for enabled connectors and stores the 810 * config in the client's modeset array. 811 * 812 * Returns: 813 * Zero on success or negative error code on failure. 814 */ 815 int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height) 816 { 817 struct drm_connector *connector, **connectors = NULL; 818 struct drm_connector_list_iter conn_iter; 819 struct drm_device *dev = client->dev; 820 unsigned int total_modes_count = 0; 821 struct drm_client_offset *offsets; 822 unsigned int connector_count = 0; 823 const struct drm_display_mode **modes; 824 struct drm_crtc **crtcs; 825 int i, ret = 0; 826 bool *enabled; 827 828 drm_dbg_kms(dev, "\n"); 829 830 if (!width) 831 width = dev->mode_config.max_width; 832 if (!height) 833 height = dev->mode_config.max_height; 834 835 drm_connector_list_iter_begin(dev, &conn_iter); 836 drm_client_for_each_connector_iter(connector, &conn_iter) { 837 struct drm_connector **tmp; 838 839 tmp = krealloc(connectors, (connector_count + 1) * sizeof(*connectors), GFP_KERNEL); 840 if (!tmp) { 841 ret = -ENOMEM; 842 goto free_connectors; 843 } 844 845 connectors = tmp; 846 drm_connector_get(connector); 847 connectors[connector_count++] = connector; 848 } 849 drm_connector_list_iter_end(&conn_iter); 850 851 if (!connector_count) 852 return 0; 853 854 crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); 855 modes = kcalloc(connector_count, sizeof(*modes), GFP_KERNEL); 856 offsets = kcalloc(connector_count, sizeof(*offsets), GFP_KERNEL); 857 enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL); 858 if (!crtcs || !modes || !enabled || !offsets) { 859 ret = -ENOMEM; 860 goto out; 861 } 862 863 mutex_lock(&client->modeset_mutex); 864 865 mutex_lock(&dev->mode_config.mutex); 866 for (i = 0; i < connector_count; i++) 867 total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height); 868 if (!total_modes_count) 869 drm_dbg_kms(dev, "No connectors reported connected with modes\n"); 870 drm_client_connectors_enabled(connectors, connector_count, enabled); 871 872 if (!drm_client_firmware_config(client, connectors, connector_count, crtcs, 873 modes, offsets, enabled, width, height)) { 874 modes_destroy(dev, modes, connector_count); 875 memset(crtcs, 0, connector_count * sizeof(*crtcs)); 876 memset(offsets, 0, connector_count * sizeof(*offsets)); 877 878 if (!drm_client_target_cloned(dev, connectors, connector_count, modes, 879 offsets, enabled, width, height) && 880 !drm_client_target_preferred(dev, connectors, connector_count, modes, 881 offsets, enabled, width, height)) 882 drm_err(dev, "Unable to find initial modes\n"); 883 884 drm_dbg_kms(dev, "picking CRTCs for %dx%d config\n", 885 width, height); 886 887 drm_client_pick_crtcs(client, connectors, connector_count, 888 crtcs, modes, 0, width, height); 889 } 890 891 mutex_unlock(&dev->mode_config.mutex); 892 893 drm_client_modeset_release(client); 894 895 for (i = 0; i < connector_count; i++) { 896 const struct drm_display_mode *mode = modes[i]; 897 struct drm_crtc *crtc = crtcs[i]; 898 struct drm_client_offset *offset = &offsets[i]; 899 900 if (mode && crtc) { 901 struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc); 902 struct drm_connector *connector = connectors[i]; 903 904 drm_dbg_kms(dev, "[CRTC:%d:%s] desired mode %s set (%d,%d)\n", 905 crtc->base.id, crtc->name, 906 mode->name, offset->x, offset->y); 907 908 if (drm_WARN_ON_ONCE(dev, modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS || 909 (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) { 910 ret = -EINVAL; 911 break; 912 } 913 914 drm_mode_destroy(dev, modeset->mode); 915 modeset->mode = drm_mode_duplicate(dev, mode); 916 if (!modeset->mode) { 917 ret = -ENOMEM; 918 break; 919 } 920 921 drm_connector_get(connector); 922 modeset->connectors[modeset->num_connectors++] = connector; 923 modeset->x = offset->x; 924 modeset->y = offset->y; 925 } 926 } 927 928 mutex_unlock(&client->modeset_mutex); 929 out: 930 kfree(crtcs); 931 modes_destroy(dev, modes, connector_count); 932 kfree(modes); 933 kfree(offsets); 934 kfree(enabled); 935 free_connectors: 936 for (i = 0; i < connector_count; i++) 937 drm_connector_put(connectors[i]); 938 kfree(connectors); 939 940 return ret; 941 } 942 EXPORT_SYMBOL(drm_client_modeset_probe); 943 944 /** 945 * drm_client_rotation() - Check the initial rotation value 946 * @modeset: DRM modeset 947 * @rotation: Returned rotation value 948 * 949 * This function checks if the primary plane in @modeset can hw rotate 950 * to match the rotation needed on its connector. 951 * 952 * Note: Currently only 0 and 180 degrees are supported. 953 * 954 * Return: 955 * True if the plane can do the rotation, false otherwise. 956 */ 957 bool drm_client_rotation(struct drm_mode_set *modeset, unsigned int *rotation) 958 { 959 struct drm_connector *connector = modeset->connectors[0]; 960 struct drm_plane *plane = modeset->crtc->primary; 961 struct drm_cmdline_mode *cmdline; 962 u64 valid_mask = 0; 963 int i; 964 965 if (!modeset->num_connectors) 966 return false; 967 968 switch (connector->display_info.panel_orientation) { 969 case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: 970 *rotation = DRM_MODE_ROTATE_180; 971 break; 972 case DRM_MODE_PANEL_ORIENTATION_LEFT_UP: 973 *rotation = DRM_MODE_ROTATE_90; 974 break; 975 case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: 976 *rotation = DRM_MODE_ROTATE_270; 977 break; 978 default: 979 *rotation = DRM_MODE_ROTATE_0; 980 } 981 982 /** 983 * The panel already defined the default rotation 984 * through its orientation. Whatever has been provided 985 * on the command line needs to be added to that. 986 * 987 * Unfortunately, the rotations are at different bit 988 * indices, so the math to add them up are not as 989 * trivial as they could. 990 * 991 * Reflections on the other hand are pretty trivial to deal with, a 992 * simple XOR between the two handle the addition nicely. 993 */ 994 cmdline = &connector->cmdline_mode; 995 if (cmdline->specified && cmdline->rotation_reflection) { 996 unsigned int cmdline_rest, panel_rest; 997 unsigned int cmdline_rot, panel_rot; 998 unsigned int sum_rot, sum_rest; 999 1000 panel_rot = ilog2(*rotation & DRM_MODE_ROTATE_MASK); 1001 cmdline_rot = ilog2(cmdline->rotation_reflection & DRM_MODE_ROTATE_MASK); 1002 sum_rot = (panel_rot + cmdline_rot) % 4; 1003 1004 panel_rest = *rotation & ~DRM_MODE_ROTATE_MASK; 1005 cmdline_rest = cmdline->rotation_reflection & ~DRM_MODE_ROTATE_MASK; 1006 sum_rest = panel_rest ^ cmdline_rest; 1007 1008 *rotation = (1 << sum_rot) | sum_rest; 1009 } 1010 1011 /* 1012 * TODO: support 90 / 270 degree hardware rotation, 1013 * depending on the hardware this may require the framebuffer 1014 * to be in a specific tiling format. 1015 */ 1016 if (((*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_0 && 1017 (*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_180) || 1018 !plane->rotation_property) 1019 return false; 1020 1021 for (i = 0; i < plane->rotation_property->num_values; i++) 1022 valid_mask |= (1ULL << plane->rotation_property->values[i]); 1023 1024 if (!(*rotation & valid_mask)) 1025 return false; 1026 1027 return true; 1028 } 1029 EXPORT_SYMBOL(drm_client_rotation); 1030 1031 static int drm_client_modeset_commit_atomic(struct drm_client_dev *client, bool active, bool check) 1032 { 1033 struct drm_device *dev = client->dev; 1034 struct drm_plane *plane; 1035 struct drm_atomic_state *state; 1036 struct drm_modeset_acquire_ctx ctx; 1037 struct drm_mode_set *mode_set; 1038 int ret; 1039 1040 drm_modeset_acquire_init(&ctx, 0); 1041 1042 state = drm_atomic_state_alloc(dev); 1043 if (!state) { 1044 ret = -ENOMEM; 1045 goto out_ctx; 1046 } 1047 1048 state->acquire_ctx = &ctx; 1049 retry: 1050 drm_for_each_plane(plane, dev) { 1051 struct drm_plane_state *plane_state; 1052 1053 plane_state = drm_atomic_get_plane_state(state, plane); 1054 if (IS_ERR(plane_state)) { 1055 ret = PTR_ERR(plane_state); 1056 goto out_state; 1057 } 1058 1059 plane_state->rotation = DRM_MODE_ROTATE_0; 1060 1061 /* disable non-primary: */ 1062 if (plane->type == DRM_PLANE_TYPE_PRIMARY) 1063 continue; 1064 1065 ret = __drm_atomic_helper_disable_plane(plane, plane_state); 1066 if (ret != 0) 1067 goto out_state; 1068 } 1069 1070 drm_client_for_each_modeset(mode_set, client) { 1071 struct drm_plane *primary = mode_set->crtc->primary; 1072 unsigned int rotation; 1073 1074 if (drm_client_rotation(mode_set, &rotation)) { 1075 struct drm_plane_state *plane_state; 1076 1077 /* Cannot fail as we've already gotten the plane state above */ 1078 plane_state = drm_atomic_get_new_plane_state(state, primary); 1079 plane_state->rotation = rotation; 1080 } 1081 1082 ret = __drm_atomic_helper_set_config(mode_set, state); 1083 if (ret != 0) 1084 goto out_state; 1085 1086 /* 1087 * __drm_atomic_helper_set_config() sets active when a 1088 * mode is set, unconditionally clear it if we force DPMS off 1089 */ 1090 if (!active) { 1091 struct drm_crtc *crtc = mode_set->crtc; 1092 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc); 1093 1094 crtc_state->active = false; 1095 } 1096 } 1097 1098 if (check) 1099 ret = drm_atomic_check_only(state); 1100 else 1101 ret = drm_atomic_commit(state); 1102 1103 out_state: 1104 if (ret == -EDEADLK) 1105 goto backoff; 1106 1107 drm_atomic_state_put(state); 1108 out_ctx: 1109 drm_modeset_drop_locks(&ctx); 1110 drm_modeset_acquire_fini(&ctx); 1111 1112 return ret; 1113 1114 backoff: 1115 drm_atomic_state_clear(state); 1116 drm_modeset_backoff(&ctx); 1117 1118 goto retry; 1119 } 1120 1121 static int drm_client_modeset_commit_legacy(struct drm_client_dev *client) 1122 { 1123 struct drm_device *dev = client->dev; 1124 struct drm_mode_set *mode_set; 1125 struct drm_plane *plane; 1126 int ret = 0; 1127 1128 drm_modeset_lock_all(dev); 1129 drm_for_each_plane(plane, dev) { 1130 if (plane->type != DRM_PLANE_TYPE_PRIMARY) 1131 drm_plane_force_disable(plane); 1132 1133 if (plane->rotation_property) 1134 drm_mode_plane_set_obj_prop(plane, 1135 plane->rotation_property, 1136 DRM_MODE_ROTATE_0); 1137 } 1138 1139 drm_client_for_each_modeset(mode_set, client) { 1140 struct drm_crtc *crtc = mode_set->crtc; 1141 1142 if (crtc->funcs->cursor_set2) { 1143 ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); 1144 if (ret) 1145 goto out; 1146 } else if (crtc->funcs->cursor_set) { 1147 ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); 1148 if (ret) 1149 goto out; 1150 } 1151 1152 ret = drm_mode_set_config_internal(mode_set); 1153 if (ret) 1154 goto out; 1155 } 1156 out: 1157 drm_modeset_unlock_all(dev); 1158 1159 return ret; 1160 } 1161 1162 /** 1163 * drm_client_modeset_check() - Check modeset configuration 1164 * @client: DRM client 1165 * 1166 * Check modeset configuration. 1167 * 1168 * Returns: 1169 * Zero on success or negative error code on failure. 1170 */ 1171 int drm_client_modeset_check(struct drm_client_dev *client) 1172 { 1173 int ret; 1174 1175 if (!drm_drv_uses_atomic_modeset(client->dev)) 1176 return 0; 1177 1178 mutex_lock(&client->modeset_mutex); 1179 ret = drm_client_modeset_commit_atomic(client, true, true); 1180 mutex_unlock(&client->modeset_mutex); 1181 1182 return ret; 1183 } 1184 EXPORT_SYMBOL(drm_client_modeset_check); 1185 1186 /** 1187 * drm_client_modeset_commit_locked() - Force commit CRTC configuration 1188 * @client: DRM client 1189 * 1190 * Commit modeset configuration to crtcs without checking if there is a DRM 1191 * master. The assumption is that the caller already holds an internal DRM 1192 * master reference acquired with drm_master_internal_acquire(). 1193 * 1194 * Returns: 1195 * Zero on success or negative error code on failure. 1196 */ 1197 int drm_client_modeset_commit_locked(struct drm_client_dev *client) 1198 { 1199 struct drm_device *dev = client->dev; 1200 int ret; 1201 1202 mutex_lock(&client->modeset_mutex); 1203 if (drm_drv_uses_atomic_modeset(dev)) 1204 ret = drm_client_modeset_commit_atomic(client, true, false); 1205 else 1206 ret = drm_client_modeset_commit_legacy(client); 1207 mutex_unlock(&client->modeset_mutex); 1208 1209 return ret; 1210 } 1211 EXPORT_SYMBOL(drm_client_modeset_commit_locked); 1212 1213 /** 1214 * drm_client_modeset_commit() - Commit CRTC configuration 1215 * @client: DRM client 1216 * 1217 * Commit modeset configuration to crtcs. 1218 * 1219 * Returns: 1220 * Zero on success or negative error code on failure. 1221 */ 1222 int drm_client_modeset_commit(struct drm_client_dev *client) 1223 { 1224 struct drm_device *dev = client->dev; 1225 int ret; 1226 1227 if (!drm_master_internal_acquire(dev)) 1228 return -EBUSY; 1229 1230 ret = drm_client_modeset_commit_locked(client); 1231 1232 drm_master_internal_release(dev); 1233 1234 return ret; 1235 } 1236 EXPORT_SYMBOL(drm_client_modeset_commit); 1237 1238 static void drm_client_modeset_dpms_legacy(struct drm_client_dev *client, int dpms_mode) 1239 { 1240 struct drm_device *dev = client->dev; 1241 struct drm_connector *connector; 1242 struct drm_mode_set *modeset; 1243 struct drm_modeset_acquire_ctx ctx; 1244 int ret; 1245 1246 DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret); 1247 drm_client_for_each_modeset(modeset, client) { 1248 int j; 1249 1250 if (!modeset->crtc->enabled) 1251 continue; 1252 1253 for (j = 0; j < modeset->num_connectors; j++) { 1254 connector = modeset->connectors[j]; 1255 connector->funcs->dpms(connector, dpms_mode); 1256 drm_object_property_set_value(&connector->base, 1257 dev->mode_config.dpms_property, dpms_mode); 1258 } 1259 } 1260 DRM_MODESET_LOCK_ALL_END(dev, ctx, ret); 1261 } 1262 1263 /** 1264 * drm_client_modeset_dpms() - Set DPMS mode 1265 * @client: DRM client 1266 * @mode: DPMS mode 1267 * 1268 * Note: For atomic drivers @mode is reduced to on/off. 1269 * 1270 * Returns: 1271 * Zero on success or negative error code on failure. 1272 */ 1273 int drm_client_modeset_dpms(struct drm_client_dev *client, int mode) 1274 { 1275 struct drm_device *dev = client->dev; 1276 int ret = 0; 1277 1278 if (!drm_master_internal_acquire(dev)) 1279 return -EBUSY; 1280 1281 mutex_lock(&client->modeset_mutex); 1282 if (drm_drv_uses_atomic_modeset(dev)) 1283 ret = drm_client_modeset_commit_atomic(client, mode == DRM_MODE_DPMS_ON, false); 1284 else 1285 drm_client_modeset_dpms_legacy(client, mode); 1286 mutex_unlock(&client->modeset_mutex); 1287 1288 drm_master_internal_release(dev); 1289 1290 return ret; 1291 } 1292 EXPORT_SYMBOL(drm_client_modeset_dpms); 1293 1294 #ifdef CONFIG_DRM_KUNIT_TEST 1295 #include "tests/drm_client_modeset_test.c" 1296 #endif 1297