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