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