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