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