1 /* 2 * Copyright (C) 2014 Red Hat 3 * Copyright (C) 2014 Intel Corp. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 21 * OTHER DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * Rob Clark <robdclark@gmail.com> 25 * Daniel Vetter <daniel.vetter@ffwll.ch> 26 */ 27 28 #include <drm/drmP.h> 29 #include <drm/drm_atomic.h> 30 #include <drm/drm_plane_helper.h> 31 #include <drm/drm_crtc_helper.h> 32 #include <drm/drm_atomic_helper.h> 33 #include <linux/fence.h> 34 35 /** 36 * DOC: overview 37 * 38 * This helper library provides implementations of check and commit functions on 39 * top of the CRTC modeset helper callbacks and the plane helper callbacks. It 40 * also provides convenience implementations for the atomic state handling 41 * callbacks for drivers which don't need to subclass the drm core structures to 42 * add their own additional internal state. 43 * 44 * This library also provides default implementations for the check callback in 45 * drm_atomic_helper_check and for the commit callback with 46 * drm_atomic_helper_commit. But the individual stages and callbacks are expose 47 * to allow drivers to mix and match and e.g. use the plane helpers only 48 * together with a driver private modeset implementation. 49 * 50 * This library also provides implementations for all the legacy driver 51 * interfaces on top of the atomic interface. See drm_atomic_helper_set_config, 52 * drm_atomic_helper_disable_plane, drm_atomic_helper_disable_plane and the 53 * various functions to implement set_property callbacks. New drivers must not 54 * implement these functions themselves but must use the provided helpers. 55 */ 56 static void 57 drm_atomic_helper_plane_changed(struct drm_atomic_state *state, 58 struct drm_plane_state *plane_state, 59 struct drm_plane *plane) 60 { 61 struct drm_crtc_state *crtc_state; 62 63 if (plane->state->crtc) { 64 crtc_state = state->crtc_states[drm_crtc_index(plane->state->crtc)]; 65 66 if (WARN_ON(!crtc_state)) 67 return; 68 69 crtc_state->planes_changed = true; 70 } 71 72 if (plane_state->crtc) { 73 crtc_state = 74 state->crtc_states[drm_crtc_index(plane_state->crtc)]; 75 76 if (WARN_ON(!crtc_state)) 77 return; 78 79 crtc_state->planes_changed = true; 80 } 81 } 82 83 static struct drm_crtc * 84 get_current_crtc_for_encoder(struct drm_device *dev, 85 struct drm_encoder *encoder) 86 { 87 struct drm_mode_config *config = &dev->mode_config; 88 struct drm_connector *connector; 89 90 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 91 92 list_for_each_entry(connector, &config->connector_list, head) { 93 if (connector->state->best_encoder != encoder) 94 continue; 95 96 return connector->state->crtc; 97 } 98 99 return NULL; 100 } 101 102 static int 103 steal_encoder(struct drm_atomic_state *state, 104 struct drm_encoder *encoder, 105 struct drm_crtc *encoder_crtc) 106 { 107 struct drm_mode_config *config = &state->dev->mode_config; 108 struct drm_crtc_state *crtc_state; 109 struct drm_connector *connector; 110 struct drm_connector_state *connector_state; 111 int ret; 112 113 /* 114 * We can only steal an encoder coming from a connector, which means we 115 * must already hold the connection_mutex. 116 */ 117 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 118 119 DRM_DEBUG_KMS("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n", 120 encoder->base.id, encoder->name, 121 encoder_crtc->base.id); 122 123 crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc); 124 if (IS_ERR(crtc_state)) 125 return PTR_ERR(crtc_state); 126 127 crtc_state->mode_changed = true; 128 129 list_for_each_entry(connector, &config->connector_list, head) { 130 if (connector->state->best_encoder != encoder) 131 continue; 132 133 DRM_DEBUG_KMS("Stealing encoder from [CONNECTOR:%d:%s]\n", 134 connector->base.id, 135 connector->name); 136 137 connector_state = drm_atomic_get_connector_state(state, 138 connector); 139 if (IS_ERR(connector_state)) 140 return PTR_ERR(connector_state); 141 142 ret = drm_atomic_set_crtc_for_connector(connector_state, NULL); 143 if (ret) 144 return ret; 145 connector_state->best_encoder = NULL; 146 } 147 148 return 0; 149 } 150 151 static int 152 update_connector_routing(struct drm_atomic_state *state, int conn_idx) 153 { 154 struct drm_connector_helper_funcs *funcs; 155 struct drm_encoder *new_encoder; 156 struct drm_crtc *encoder_crtc; 157 struct drm_connector *connector; 158 struct drm_connector_state *connector_state; 159 struct drm_crtc_state *crtc_state; 160 int idx, ret; 161 162 connector = state->connectors[conn_idx]; 163 connector_state = state->connector_states[conn_idx]; 164 165 if (!connector) 166 return 0; 167 168 DRM_DEBUG_KMS("Updating routing for [CONNECTOR:%d:%s]\n", 169 connector->base.id, 170 connector->name); 171 172 if (connector->state->crtc != connector_state->crtc) { 173 if (connector->state->crtc) { 174 idx = drm_crtc_index(connector->state->crtc); 175 176 crtc_state = state->crtc_states[idx]; 177 crtc_state->mode_changed = true; 178 } 179 180 if (connector_state->crtc) { 181 idx = drm_crtc_index(connector_state->crtc); 182 183 crtc_state = state->crtc_states[idx]; 184 crtc_state->mode_changed = true; 185 } 186 } 187 188 if (!connector_state->crtc) { 189 DRM_DEBUG_KMS("Disabling [CONNECTOR:%d:%s]\n", 190 connector->base.id, 191 connector->name); 192 193 connector_state->best_encoder = NULL; 194 195 return 0; 196 } 197 198 funcs = connector->helper_private; 199 new_encoder = funcs->best_encoder(connector); 200 201 if (!new_encoder) { 202 DRM_DEBUG_KMS("No suitable encoder found for [CONNECTOR:%d:%s]\n", 203 connector->base.id, 204 connector->name); 205 return -EINVAL; 206 } 207 208 if (new_encoder == connector_state->best_encoder) { 209 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n", 210 connector->base.id, 211 connector->name, 212 new_encoder->base.id, 213 new_encoder->name, 214 connector_state->crtc->base.id); 215 216 return 0; 217 } 218 219 encoder_crtc = get_current_crtc_for_encoder(state->dev, 220 new_encoder); 221 222 if (encoder_crtc) { 223 ret = steal_encoder(state, new_encoder, encoder_crtc); 224 if (ret) { 225 DRM_DEBUG_KMS("Encoder stealing failed for [CONNECTOR:%d:%s]\n", 226 connector->base.id, 227 connector->name); 228 return ret; 229 } 230 } 231 232 connector_state->best_encoder = new_encoder; 233 idx = drm_crtc_index(connector_state->crtc); 234 235 crtc_state = state->crtc_states[idx]; 236 crtc_state->mode_changed = true; 237 238 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n", 239 connector->base.id, 240 connector->name, 241 new_encoder->base.id, 242 new_encoder->name, 243 connector_state->crtc->base.id); 244 245 return 0; 246 } 247 248 static int 249 mode_fixup(struct drm_atomic_state *state) 250 { 251 int ncrtcs = state->dev->mode_config.num_crtc; 252 struct drm_crtc_state *crtc_state; 253 struct drm_connector_state *conn_state; 254 int i; 255 bool ret; 256 257 for (i = 0; i < ncrtcs; i++) { 258 crtc_state = state->crtc_states[i]; 259 260 if (!crtc_state || !crtc_state->mode_changed) 261 continue; 262 263 drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); 264 } 265 266 for (i = 0; i < state->num_connector; i++) { 267 struct drm_encoder_helper_funcs *funcs; 268 struct drm_encoder *encoder; 269 270 conn_state = state->connector_states[i]; 271 272 if (!conn_state) 273 continue; 274 275 WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); 276 277 if (!conn_state->crtc || !conn_state->best_encoder) 278 continue; 279 280 crtc_state = 281 state->crtc_states[drm_crtc_index(conn_state->crtc)]; 282 283 /* 284 * Each encoder has at most one connector (since we always steal 285 * it away), so we won't call ->mode_fixup twice. 286 */ 287 encoder = conn_state->best_encoder; 288 funcs = encoder->helper_private; 289 290 if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { 291 ret = encoder->bridge->funcs->mode_fixup( 292 encoder->bridge, &crtc_state->mode, 293 &crtc_state->adjusted_mode); 294 if (!ret) { 295 DRM_DEBUG_KMS("Bridge fixup failed\n"); 296 return -EINVAL; 297 } 298 } 299 300 if (funcs->atomic_check) { 301 ret = funcs->atomic_check(encoder, crtc_state, 302 conn_state); 303 if (ret) { 304 DRM_DEBUG_KMS("[ENCODER:%d:%s] check failed\n", 305 encoder->base.id, encoder->name); 306 return ret; 307 } 308 } else { 309 ret = funcs->mode_fixup(encoder, &crtc_state->mode, 310 &crtc_state->adjusted_mode); 311 if (!ret) { 312 DRM_DEBUG_KMS("[ENCODER:%d:%s] fixup failed\n", 313 encoder->base.id, encoder->name); 314 return -EINVAL; 315 } 316 } 317 } 318 319 for (i = 0; i < ncrtcs; i++) { 320 struct drm_crtc_helper_funcs *funcs; 321 struct drm_crtc *crtc; 322 323 crtc_state = state->crtc_states[i]; 324 crtc = state->crtcs[i]; 325 326 if (!crtc_state || !crtc_state->mode_changed) 327 continue; 328 329 funcs = crtc->helper_private; 330 ret = funcs->mode_fixup(crtc, &crtc_state->mode, 331 &crtc_state->adjusted_mode); 332 if (!ret) { 333 DRM_DEBUG_KMS("[CRTC:%d] fixup failed\n", 334 crtc->base.id); 335 return -EINVAL; 336 } 337 } 338 339 return 0; 340 } 341 342 static bool 343 needs_modeset(struct drm_crtc_state *state) 344 { 345 return state->mode_changed || state->active_changed; 346 } 347 348 /** 349 * drm_atomic_helper_check - validate state object for modeset changes 350 * @dev: DRM device 351 * @state: the driver state object 352 * 353 * Check the state object to see if the requested state is physically possible. 354 * This does all the crtc and connector related computations for an atomic 355 * update. It computes and updates crtc_state->mode_changed, adds any additional 356 * connectors needed for full modesets and calls down into ->mode_fixup 357 * functions of the driver backend. 358 * 359 * IMPORTANT: 360 * 361 * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a 362 * plane update can't be done without a full modeset) _must_ call this function 363 * afterwards after that change. It is permitted to call this function multiple 364 * times for the same update, e.g. when the ->atomic_check functions depend upon 365 * the adjusted dotclock for fifo space allocation and watermark computation. 366 * 367 * RETURNS 368 * Zero for success or -errno 369 */ 370 int 371 drm_atomic_helper_check_modeset(struct drm_device *dev, 372 struct drm_atomic_state *state) 373 { 374 int ncrtcs = dev->mode_config.num_crtc; 375 struct drm_crtc *crtc; 376 struct drm_crtc_state *crtc_state; 377 int i, ret; 378 379 for (i = 0; i < ncrtcs; i++) { 380 crtc = state->crtcs[i]; 381 crtc_state = state->crtc_states[i]; 382 383 if (!crtc) 384 continue; 385 386 if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { 387 DRM_DEBUG_KMS("[CRTC:%d] mode changed\n", 388 crtc->base.id); 389 crtc_state->mode_changed = true; 390 } 391 392 if (crtc->state->enable != crtc_state->enable) { 393 DRM_DEBUG_KMS("[CRTC:%d] enable changed\n", 394 crtc->base.id); 395 crtc_state->mode_changed = true; 396 } 397 } 398 399 for (i = 0; i < state->num_connector; i++) { 400 /* 401 * This only sets crtc->mode_changed for routing changes, 402 * drivers must set crtc->mode_changed themselves when connector 403 * properties need to be updated. 404 */ 405 ret = update_connector_routing(state, i); 406 if (ret) 407 return ret; 408 } 409 410 /* 411 * After all the routing has been prepared we need to add in any 412 * connector which is itself unchanged, but who's crtc changes it's 413 * configuration. This must be done before calling mode_fixup in case a 414 * crtc only changed its mode but has the same set of connectors. 415 */ 416 for (i = 0; i < ncrtcs; i++) { 417 int num_connectors; 418 419 crtc = state->crtcs[i]; 420 crtc_state = state->crtc_states[i]; 421 422 if (!crtc) 423 continue; 424 425 /* 426 * We must set ->active_changed after walking connectors for 427 * otherwise an update that only changes active would result in 428 * a full modeset because update_connector_routing force that. 429 */ 430 if (crtc->state->active != crtc_state->active) { 431 DRM_DEBUG_KMS("[CRTC:%d] active changed\n", 432 crtc->base.id); 433 crtc_state->active_changed = true; 434 } 435 436 if (!needs_modeset(crtc_state)) 437 continue; 438 439 DRM_DEBUG_KMS("[CRTC:%d] needs all connectors, enable: %c, active: %c\n", 440 crtc->base.id, 441 crtc_state->enable ? 'y' : 'n', 442 crtc_state->active ? 'y' : 'n'); 443 444 ret = drm_atomic_add_affected_connectors(state, crtc); 445 if (ret != 0) 446 return ret; 447 448 num_connectors = drm_atomic_connectors_for_crtc(state, 449 crtc); 450 451 if (crtc_state->enable != !!num_connectors) { 452 DRM_DEBUG_KMS("[CRTC:%d] enabled/connectors mismatch\n", 453 crtc->base.id); 454 455 return -EINVAL; 456 } 457 } 458 459 return mode_fixup(state); 460 } 461 EXPORT_SYMBOL(drm_atomic_helper_check_modeset); 462 463 /** 464 * drm_atomic_helper_check - validate state object for modeset changes 465 * @dev: DRM device 466 * @state: the driver state object 467 * 468 * Check the state object to see if the requested state is physically possible. 469 * This does all the plane update related checks using by calling into the 470 * ->atomic_check hooks provided by the driver. 471 * 472 * RETURNS 473 * Zero for success or -errno 474 */ 475 int 476 drm_atomic_helper_check_planes(struct drm_device *dev, 477 struct drm_atomic_state *state) 478 { 479 int nplanes = dev->mode_config.num_total_plane; 480 int ncrtcs = dev->mode_config.num_crtc; 481 int i, ret = 0; 482 483 for (i = 0; i < nplanes; i++) { 484 struct drm_plane_helper_funcs *funcs; 485 struct drm_plane *plane = state->planes[i]; 486 struct drm_plane_state *plane_state = state->plane_states[i]; 487 488 if (!plane) 489 continue; 490 491 funcs = plane->helper_private; 492 493 drm_atomic_helper_plane_changed(state, plane_state, plane); 494 495 if (!funcs || !funcs->atomic_check) 496 continue; 497 498 ret = funcs->atomic_check(plane, plane_state); 499 if (ret) { 500 DRM_DEBUG_KMS("[PLANE:%d] atomic driver check failed\n", 501 plane->base.id); 502 return ret; 503 } 504 } 505 506 for (i = 0; i < ncrtcs; i++) { 507 struct drm_crtc_helper_funcs *funcs; 508 struct drm_crtc *crtc = state->crtcs[i]; 509 510 if (!crtc) 511 continue; 512 513 funcs = crtc->helper_private; 514 515 if (!funcs || !funcs->atomic_check) 516 continue; 517 518 ret = funcs->atomic_check(crtc, state->crtc_states[i]); 519 if (ret) { 520 DRM_DEBUG_KMS("[CRTC:%d] atomic driver check failed\n", 521 crtc->base.id); 522 return ret; 523 } 524 } 525 526 return ret; 527 } 528 EXPORT_SYMBOL(drm_atomic_helper_check_planes); 529 530 /** 531 * drm_atomic_helper_check - validate state object 532 * @dev: DRM device 533 * @state: the driver state object 534 * 535 * Check the state object to see if the requested state is physically possible. 536 * Only crtcs and planes have check callbacks, so for any additional (global) 537 * checking that a driver needs it can simply wrap that around this function. 538 * Drivers without such needs can directly use this as their ->atomic_check() 539 * callback. 540 * 541 * This just wraps the two parts of the state checking for planes and modeset 542 * state in the default order: First it calls drm_atomic_helper_check_modeset() 543 * and then drm_atomic_helper_check_planes(). The assumption is that the 544 * ->atomic_check functions depend upon an updated adjusted_mode.clock to 545 * e.g. properly compute watermarks. 546 * 547 * RETURNS 548 * Zero for success or -errno 549 */ 550 int drm_atomic_helper_check(struct drm_device *dev, 551 struct drm_atomic_state *state) 552 { 553 int ret; 554 555 ret = drm_atomic_helper_check_modeset(dev, state); 556 if (ret) 557 return ret; 558 559 ret = drm_atomic_helper_check_planes(dev, state); 560 if (ret) 561 return ret; 562 563 return ret; 564 } 565 EXPORT_SYMBOL(drm_atomic_helper_check); 566 567 static void 568 disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) 569 { 570 int ncrtcs = old_state->dev->mode_config.num_crtc; 571 int i; 572 573 for (i = 0; i < old_state->num_connector; i++) { 574 struct drm_connector_state *old_conn_state; 575 struct drm_connector *connector; 576 struct drm_encoder_helper_funcs *funcs; 577 struct drm_encoder *encoder; 578 struct drm_crtc_state *old_crtc_state; 579 580 old_conn_state = old_state->connector_states[i]; 581 connector = old_state->connectors[i]; 582 583 /* Shut down everything that's in the changeset and currently 584 * still on. So need to check the old, saved state. */ 585 if (!old_conn_state || !old_conn_state->crtc) 586 continue; 587 588 old_crtc_state = old_state->crtc_states[drm_crtc_index(old_conn_state->crtc)]; 589 590 if (!old_crtc_state->active) 591 continue; 592 593 encoder = old_conn_state->best_encoder; 594 595 /* We shouldn't get this far if we didn't previously have 596 * an encoder.. but WARN_ON() rather than explode. 597 */ 598 if (WARN_ON(!encoder)) 599 continue; 600 601 funcs = encoder->helper_private; 602 603 DRM_DEBUG_KMS("disabling [ENCODER:%d:%s]\n", 604 encoder->base.id, encoder->name); 605 606 /* 607 * Each encoder has at most one connector (since we always steal 608 * it away), so we won't call call disable hooks twice. 609 */ 610 if (encoder->bridge) 611 encoder->bridge->funcs->disable(encoder->bridge); 612 613 /* Right function depends upon target state. */ 614 if (connector->state->crtc && funcs->prepare) 615 funcs->prepare(encoder); 616 else if (funcs->disable) 617 funcs->disable(encoder); 618 else 619 funcs->dpms(encoder, DRM_MODE_DPMS_OFF); 620 621 if (encoder->bridge) 622 encoder->bridge->funcs->post_disable(encoder->bridge); 623 } 624 625 for (i = 0; i < ncrtcs; i++) { 626 struct drm_crtc_helper_funcs *funcs; 627 struct drm_crtc *crtc; 628 struct drm_crtc_state *old_crtc_state; 629 630 crtc = old_state->crtcs[i]; 631 old_crtc_state = old_state->crtc_states[i]; 632 633 /* Shut down everything that needs a full modeset. */ 634 if (!crtc || !needs_modeset(crtc->state)) 635 continue; 636 637 if (!old_crtc_state->active) 638 continue; 639 640 funcs = crtc->helper_private; 641 642 DRM_DEBUG_KMS("disabling [CRTC:%d]\n", 643 crtc->base.id); 644 645 646 /* Right function depends upon target state. */ 647 if (crtc->state->enable && funcs->prepare) 648 funcs->prepare(crtc); 649 else if (funcs->disable) 650 funcs->disable(crtc); 651 else 652 funcs->dpms(crtc, DRM_MODE_DPMS_OFF); 653 } 654 } 655 656 static void 657 set_routing_links(struct drm_device *dev, struct drm_atomic_state *old_state) 658 { 659 int ncrtcs = old_state->dev->mode_config.num_crtc; 660 int i; 661 662 /* clear out existing links */ 663 for (i = 0; i < old_state->num_connector; i++) { 664 struct drm_connector *connector; 665 666 connector = old_state->connectors[i]; 667 668 if (!connector || !connector->encoder) 669 continue; 670 671 WARN_ON(!connector->encoder->crtc); 672 673 connector->encoder->crtc = NULL; 674 connector->encoder = NULL; 675 } 676 677 /* set new links */ 678 for (i = 0; i < old_state->num_connector; i++) { 679 struct drm_connector *connector; 680 681 connector = old_state->connectors[i]; 682 683 if (!connector || !connector->state->crtc) 684 continue; 685 686 if (WARN_ON(!connector->state->best_encoder)) 687 continue; 688 689 connector->encoder = connector->state->best_encoder; 690 connector->encoder->crtc = connector->state->crtc; 691 } 692 693 /* set legacy state in the crtc structure */ 694 for (i = 0; i < ncrtcs; i++) { 695 struct drm_crtc *crtc; 696 697 crtc = old_state->crtcs[i]; 698 699 if (!crtc) 700 continue; 701 702 crtc->mode = crtc->state->mode; 703 crtc->enabled = crtc->state->enable; 704 crtc->x = crtc->primary->state->src_x >> 16; 705 crtc->y = crtc->primary->state->src_y >> 16; 706 } 707 } 708 709 static void 710 crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) 711 { 712 int ncrtcs = old_state->dev->mode_config.num_crtc; 713 int i; 714 715 for (i = 0; i < ncrtcs; i++) { 716 struct drm_crtc_helper_funcs *funcs; 717 struct drm_crtc *crtc; 718 719 crtc = old_state->crtcs[i]; 720 721 if (!crtc || !crtc->state->mode_changed) 722 continue; 723 724 funcs = crtc->helper_private; 725 726 if (crtc->state->enable) { 727 DRM_DEBUG_KMS("modeset on [CRTC:%d]\n", 728 crtc->base.id); 729 730 funcs->mode_set_nofb(crtc); 731 } 732 } 733 734 for (i = 0; i < old_state->num_connector; i++) { 735 struct drm_connector *connector; 736 struct drm_crtc_state *new_crtc_state; 737 struct drm_encoder_helper_funcs *funcs; 738 struct drm_encoder *encoder; 739 struct drm_display_mode *mode, *adjusted_mode; 740 741 connector = old_state->connectors[i]; 742 743 if (!connector || !connector->state->best_encoder) 744 continue; 745 746 encoder = connector->state->best_encoder; 747 funcs = encoder->helper_private; 748 new_crtc_state = connector->state->crtc->state; 749 mode = &new_crtc_state->mode; 750 adjusted_mode = &new_crtc_state->adjusted_mode; 751 752 if (!new_crtc_state->mode_changed) 753 continue; 754 755 DRM_DEBUG_KMS("modeset on [ENCODER:%d:%s]\n", 756 encoder->base.id, encoder->name); 757 758 /* 759 * Each encoder has at most one connector (since we always steal 760 * it away), so we won't call call mode_set hooks twice. 761 */ 762 funcs->mode_set(encoder, mode, adjusted_mode); 763 764 if (encoder->bridge && encoder->bridge->funcs->mode_set) 765 encoder->bridge->funcs->mode_set(encoder->bridge, 766 mode, adjusted_mode); 767 } 768 } 769 770 /** 771 * drm_atomic_helper_commit_pre_planes - modeset commit before plane updates 772 * @dev: DRM device 773 * @state: atomic state 774 * 775 * This function commits the modeset changes that need to be committed before 776 * updating planes. It shuts down all the outputs that need to be shut down and 777 * prepares them (if required) with the new mode. 778 */ 779 void drm_atomic_helper_commit_pre_planes(struct drm_device *dev, 780 struct drm_atomic_state *state) 781 { 782 disable_outputs(dev, state); 783 set_routing_links(dev, state); 784 crtc_set_mode(dev, state); 785 } 786 EXPORT_SYMBOL(drm_atomic_helper_commit_pre_planes); 787 788 /** 789 * drm_atomic_helper_commit_post_planes - modeset commit after plane updates 790 * @dev: DRM device 791 * @old_state: atomic state object with old state structures 792 * 793 * This function commits the modeset changes that need to be committed after 794 * updating planes: It enables all the outputs with the new configuration which 795 * had to be turned off for the update. 796 */ 797 void drm_atomic_helper_commit_post_planes(struct drm_device *dev, 798 struct drm_atomic_state *old_state) 799 { 800 int ncrtcs = old_state->dev->mode_config.num_crtc; 801 int i; 802 803 for (i = 0; i < ncrtcs; i++) { 804 struct drm_crtc_helper_funcs *funcs; 805 struct drm_crtc *crtc; 806 807 crtc = old_state->crtcs[i]; 808 809 /* Need to filter out CRTCs where only planes change. */ 810 if (!crtc || !needs_modeset(crtc->state)) 811 continue; 812 813 if (!crtc->state->active) 814 continue; 815 816 funcs = crtc->helper_private; 817 818 if (crtc->state->enable) { 819 DRM_DEBUG_KMS("enabling [CRTC:%d]\n", 820 crtc->base.id); 821 822 if (funcs->enable) 823 funcs->enable(crtc); 824 else 825 funcs->commit(crtc); 826 } 827 } 828 829 for (i = 0; i < old_state->num_connector; i++) { 830 struct drm_connector *connector; 831 struct drm_encoder_helper_funcs *funcs; 832 struct drm_encoder *encoder; 833 834 connector = old_state->connectors[i]; 835 836 if (!connector || !connector->state->best_encoder) 837 continue; 838 839 if (!connector->state->crtc->state->active) 840 continue; 841 842 encoder = connector->state->best_encoder; 843 funcs = encoder->helper_private; 844 845 DRM_DEBUG_KMS("enabling [ENCODER:%d:%s]\n", 846 encoder->base.id, encoder->name); 847 848 /* 849 * Each encoder has at most one connector (since we always steal 850 * it away), so we won't call call enable hooks twice. 851 */ 852 if (encoder->bridge) 853 encoder->bridge->funcs->pre_enable(encoder->bridge); 854 855 if (funcs->enable) 856 funcs->enable(encoder); 857 else 858 funcs->commit(encoder); 859 860 if (encoder->bridge) 861 encoder->bridge->funcs->enable(encoder->bridge); 862 } 863 } 864 EXPORT_SYMBOL(drm_atomic_helper_commit_post_planes); 865 866 static void wait_for_fences(struct drm_device *dev, 867 struct drm_atomic_state *state) 868 { 869 int nplanes = dev->mode_config.num_total_plane; 870 int i; 871 872 for (i = 0; i < nplanes; i++) { 873 struct drm_plane *plane = state->planes[i]; 874 875 if (!plane || !plane->state->fence) 876 continue; 877 878 WARN_ON(!plane->state->fb); 879 880 #if 0 881 fence_wait(plane->state->fence, false); 882 fence_put(plane->state->fence); 883 #endif 884 plane->state->fence = NULL; 885 } 886 } 887 888 static bool framebuffer_changed(struct drm_device *dev, 889 struct drm_atomic_state *old_state, 890 struct drm_crtc *crtc) 891 { 892 struct drm_plane *plane; 893 struct drm_plane_state *old_plane_state; 894 int nplanes = old_state->dev->mode_config.num_total_plane; 895 int i; 896 897 for (i = 0; i < nplanes; i++) { 898 plane = old_state->planes[i]; 899 old_plane_state = old_state->plane_states[i]; 900 901 if (!plane) 902 continue; 903 904 if (plane->state->crtc != crtc && 905 old_plane_state->crtc != crtc) 906 continue; 907 908 if (plane->state->fb != old_plane_state->fb) 909 return true; 910 } 911 912 return false; 913 } 914 915 /** 916 * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs 917 * @dev: DRM device 918 * @old_state: atomic state object with old state structures 919 * 920 * Helper to, after atomic commit, wait for vblanks on all effected 921 * crtcs (ie. before cleaning up old framebuffers using 922 * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the 923 * framebuffers have actually changed to optimize for the legacy cursor and 924 * plane update use-case. 925 */ 926 void 927 drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, 928 struct drm_atomic_state *old_state) 929 { 930 struct drm_crtc *crtc; 931 struct drm_crtc_state *old_crtc_state; 932 int ncrtcs = old_state->dev->mode_config.num_crtc; 933 int i, ret; 934 935 for (i = 0; i < ncrtcs; i++) { 936 crtc = old_state->crtcs[i]; 937 old_crtc_state = old_state->crtc_states[i]; 938 939 if (!crtc) 940 continue; 941 942 /* No one cares about the old state, so abuse it for tracking 943 * and store whether we hold a vblank reference (and should do a 944 * vblank wait) in the ->enable boolean. */ 945 old_crtc_state->enable = false; 946 947 if (!crtc->state->enable) 948 continue; 949 950 /* Legacy cursor ioctls are completely unsynced, and userspace 951 * relies on that (by doing tons of cursor updates). */ 952 if (old_state->legacy_cursor_update) 953 continue; 954 955 if (!framebuffer_changed(dev, old_state, crtc)) 956 continue; 957 958 ret = drm_crtc_vblank_get(crtc); 959 if (ret != 0) 960 continue; 961 962 old_crtc_state->enable = true; 963 old_crtc_state->last_vblank_count = drm_vblank_count(dev, i); 964 } 965 966 for (i = 0; i < ncrtcs; i++) { 967 crtc = old_state->crtcs[i]; 968 old_crtc_state = old_state->crtc_states[i]; 969 970 if (!crtc || !old_crtc_state->enable) 971 continue; 972 973 ret = wait_event_timeout(dev->vblank[i].queue, 974 old_crtc_state->last_vblank_count != 975 drm_vblank_count(dev, i), 976 msecs_to_jiffies(50)); 977 978 drm_crtc_vblank_put(crtc); 979 } 980 } 981 EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); 982 983 /** 984 * drm_atomic_helper_commit - commit validated state object 985 * @dev: DRM device 986 * @state: the driver state object 987 * @async: asynchronous commit 988 * 989 * This function commits a with drm_atomic_helper_check() pre-validated state 990 * object. This can still fail when e.g. the framebuffer reservation fails. For 991 * now this doesn't implement asynchronous commits. 992 * 993 * RETURNS 994 * Zero for success or -errno. 995 */ 996 int drm_atomic_helper_commit(struct drm_device *dev, 997 struct drm_atomic_state *state, 998 bool async) 999 { 1000 int ret; 1001 1002 if (async) 1003 return -EBUSY; 1004 1005 ret = drm_atomic_helper_prepare_planes(dev, state); 1006 if (ret) 1007 return ret; 1008 1009 /* 1010 * This is the point of no return - everything below never fails except 1011 * when the hw goes bonghits. Which means we can commit the new state on 1012 * the software side now. 1013 */ 1014 1015 drm_atomic_helper_swap_state(dev, state); 1016 1017 /* 1018 * Everything below can be run asynchronously without the need to grab 1019 * any modeset locks at all under one conditions: It must be guaranteed 1020 * that the asynchronous work has either been cancelled (if the driver 1021 * supports it, which at least requires that the framebuffers get 1022 * cleaned up with drm_atomic_helper_cleanup_planes()) or completed 1023 * before the new state gets committed on the software side with 1024 * drm_atomic_helper_swap_state(). 1025 * 1026 * This scheme allows new atomic state updates to be prepared and 1027 * checked in parallel to the asynchronous completion of the previous 1028 * update. Which is important since compositors need to figure out the 1029 * composition of the next frame right after having submitted the 1030 * current layout. 1031 */ 1032 1033 wait_for_fences(dev, state); 1034 1035 drm_atomic_helper_commit_pre_planes(dev, state); 1036 1037 drm_atomic_helper_commit_planes(dev, state); 1038 1039 drm_atomic_helper_commit_post_planes(dev, state); 1040 1041 drm_atomic_helper_wait_for_vblanks(dev, state); 1042 1043 drm_atomic_helper_cleanup_planes(dev, state); 1044 1045 drm_atomic_state_free(state); 1046 1047 return 0; 1048 } 1049 EXPORT_SYMBOL(drm_atomic_helper_commit); 1050 1051 /** 1052 * DOC: implementing async commit 1053 * 1054 * For now the atomic helpers don't support async commit directly. If there is 1055 * real need it could be added though, using the dma-buf fence infrastructure 1056 * for generic synchronization with outstanding rendering. 1057 * 1058 * For now drivers have to implement async commit themselves, with the following 1059 * sequence being the recommended one: 1060 * 1061 * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function 1062 * which commit needs to call which can fail, so we want to run it first and 1063 * synchronously. 1064 * 1065 * 2. Synchronize with any outstanding asynchronous commit worker threads which 1066 * might be affected the new state update. This can be done by either cancelling 1067 * or flushing the work items, depending upon whether the driver can deal with 1068 * cancelled updates. Note that it is important to ensure that the framebuffer 1069 * cleanup is still done when cancelling. 1070 * 1071 * For sufficient parallelism it is recommended to have a work item per crtc 1072 * (for updates which don't touch global state) and a global one. Then we only 1073 * need to synchronize with the crtc work items for changed crtcs and the global 1074 * work item, which allows nice concurrent updates on disjoint sets of crtcs. 1075 * 1076 * 3. The software state is updated synchronously with 1077 * drm_atomic_helper_swap_state. Doing this under the protection of all modeset 1078 * locks means concurrent callers never see inconsistent state. And doing this 1079 * while it's guaranteed that no relevant async worker runs means that async 1080 * workers do not need grab any locks. Actually they must not grab locks, for 1081 * otherwise the work flushing will deadlock. 1082 * 1083 * 4. Schedule a work item to do all subsequent steps, using the split-out 1084 * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and 1085 * then cleaning up the framebuffers after the old framebuffer is no longer 1086 * being displayed. 1087 */ 1088 1089 /** 1090 * drm_atomic_helper_prepare_planes - prepare plane resources after commit 1091 * @dev: DRM device 1092 * @state: atomic state object with old state structures 1093 * 1094 * This function prepares plane state, specifically framebuffers, for the new 1095 * configuration. If any failure is encountered this function will call 1096 * ->cleanup_fb on any already successfully prepared framebuffer. 1097 * 1098 * Returns: 1099 * 0 on success, negative error code on failure. 1100 */ 1101 int drm_atomic_helper_prepare_planes(struct drm_device *dev, 1102 struct drm_atomic_state *state) 1103 { 1104 int nplanes = dev->mode_config.num_total_plane; 1105 int ret, i; 1106 1107 for (i = 0; i < nplanes; i++) { 1108 struct drm_plane_helper_funcs *funcs; 1109 struct drm_plane *plane = state->planes[i]; 1110 struct drm_framebuffer *fb; 1111 1112 if (!plane) 1113 continue; 1114 1115 funcs = plane->helper_private; 1116 1117 fb = state->plane_states[i]->fb; 1118 1119 if (fb && funcs->prepare_fb) { 1120 ret = funcs->prepare_fb(plane, fb); 1121 if (ret) 1122 goto fail; 1123 } 1124 } 1125 1126 return 0; 1127 1128 fail: 1129 for (i--; i >= 0; i--) { 1130 struct drm_plane_helper_funcs *funcs; 1131 struct drm_plane *plane = state->planes[i]; 1132 struct drm_framebuffer *fb; 1133 1134 if (!plane) 1135 continue; 1136 1137 funcs = plane->helper_private; 1138 1139 fb = state->plane_states[i]->fb; 1140 1141 if (fb && funcs->cleanup_fb) 1142 funcs->cleanup_fb(plane, fb); 1143 1144 } 1145 1146 return ret; 1147 } 1148 EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); 1149 1150 /** 1151 * drm_atomic_helper_commit_planes - commit plane state 1152 * @dev: DRM device 1153 * @old_state: atomic state object with old state structures 1154 * 1155 * This function commits the new plane state using the plane and atomic helper 1156 * functions for planes and crtcs. It assumes that the atomic state has already 1157 * been pushed into the relevant object state pointers, since this step can no 1158 * longer fail. 1159 * 1160 * It still requires the global state object @old_state to know which planes and 1161 * crtcs need to be updated though. 1162 */ 1163 void drm_atomic_helper_commit_planes(struct drm_device *dev, 1164 struct drm_atomic_state *old_state) 1165 { 1166 int nplanes = dev->mode_config.num_total_plane; 1167 int ncrtcs = dev->mode_config.num_crtc; 1168 int i; 1169 1170 for (i = 0; i < ncrtcs; i++) { 1171 struct drm_crtc_helper_funcs *funcs; 1172 struct drm_crtc *crtc = old_state->crtcs[i]; 1173 1174 if (!crtc) 1175 continue; 1176 1177 funcs = crtc->helper_private; 1178 1179 if (!funcs || !funcs->atomic_begin) 1180 continue; 1181 1182 funcs->atomic_begin(crtc); 1183 } 1184 1185 for (i = 0; i < nplanes; i++) { 1186 struct drm_plane_helper_funcs *funcs; 1187 struct drm_plane *plane = old_state->planes[i]; 1188 struct drm_plane_state *old_plane_state; 1189 1190 if (!plane) 1191 continue; 1192 1193 funcs = plane->helper_private; 1194 1195 if (!funcs) 1196 continue; 1197 1198 old_plane_state = old_state->plane_states[i]; 1199 1200 /* 1201 * Special-case disabling the plane if drivers support it. 1202 */ 1203 if (drm_atomic_plane_disabling(plane, old_plane_state) && 1204 funcs->atomic_disable) 1205 funcs->atomic_disable(plane, old_plane_state); 1206 else 1207 funcs->atomic_update(plane, old_plane_state); 1208 } 1209 1210 for (i = 0; i < ncrtcs; i++) { 1211 struct drm_crtc_helper_funcs *funcs; 1212 struct drm_crtc *crtc = old_state->crtcs[i]; 1213 1214 if (!crtc) 1215 continue; 1216 1217 funcs = crtc->helper_private; 1218 1219 if (!funcs || !funcs->atomic_flush) 1220 continue; 1221 1222 funcs->atomic_flush(crtc); 1223 } 1224 } 1225 EXPORT_SYMBOL(drm_atomic_helper_commit_planes); 1226 1227 /** 1228 * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit 1229 * @dev: DRM device 1230 * @old_state: atomic state object with old state structures 1231 * 1232 * This function cleans up plane state, specifically framebuffers, from the old 1233 * configuration. Hence the old configuration must be perserved in @old_state to 1234 * be able to call this function. 1235 * 1236 * This function must also be called on the new state when the atomic update 1237 * fails at any point after calling drm_atomic_helper_prepare_planes(). 1238 */ 1239 void drm_atomic_helper_cleanup_planes(struct drm_device *dev, 1240 struct drm_atomic_state *old_state) 1241 { 1242 int nplanes = dev->mode_config.num_total_plane; 1243 int i; 1244 1245 for (i = 0; i < nplanes; i++) { 1246 struct drm_plane_helper_funcs *funcs; 1247 struct drm_plane *plane = old_state->planes[i]; 1248 struct drm_framebuffer *old_fb; 1249 1250 if (!plane) 1251 continue; 1252 1253 funcs = plane->helper_private; 1254 1255 old_fb = old_state->plane_states[i]->fb; 1256 1257 if (old_fb && funcs->cleanup_fb) 1258 funcs->cleanup_fb(plane, old_fb); 1259 } 1260 } 1261 EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); 1262 1263 /** 1264 * drm_atomic_helper_swap_state - store atomic state into current sw state 1265 * @dev: DRM device 1266 * @state: atomic state 1267 * 1268 * This function stores the atomic state into the current state pointers in all 1269 * driver objects. It should be called after all failing steps have been done 1270 * and succeeded, but before the actual hardware state is committed. 1271 * 1272 * For cleanup and error recovery the current state for all changed objects will 1273 * be swaped into @state. 1274 * 1275 * With that sequence it fits perfectly into the plane prepare/cleanup sequence: 1276 * 1277 * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. 1278 * 1279 * 2. Do any other steps that might fail. 1280 * 1281 * 3. Put the staged state into the current state pointers with this function. 1282 * 1283 * 4. Actually commit the hardware state. 1284 * 1285 * 5. Call drm_atomic_helper_cleanup_planes with @state, which since step 3 1286 * contains the old state. Also do any other cleanup required with that state. 1287 */ 1288 void drm_atomic_helper_swap_state(struct drm_device *dev, 1289 struct drm_atomic_state *state) 1290 { 1291 int i; 1292 1293 for (i = 0; i < dev->mode_config.num_connector; i++) { 1294 struct drm_connector *connector = state->connectors[i]; 1295 1296 if (!connector) 1297 continue; 1298 1299 connector->state->state = state; 1300 swap(state->connector_states[i], connector->state); 1301 connector->state->state = NULL; 1302 } 1303 1304 for (i = 0; i < dev->mode_config.num_crtc; i++) { 1305 struct drm_crtc *crtc = state->crtcs[i]; 1306 1307 if (!crtc) 1308 continue; 1309 1310 crtc->state->state = state; 1311 swap(state->crtc_states[i], crtc->state); 1312 crtc->state->state = NULL; 1313 } 1314 1315 for (i = 0; i < dev->mode_config.num_total_plane; i++) { 1316 struct drm_plane *plane = state->planes[i]; 1317 1318 if (!plane) 1319 continue; 1320 1321 plane->state->state = state; 1322 swap(state->plane_states[i], plane->state); 1323 plane->state->state = NULL; 1324 } 1325 } 1326 EXPORT_SYMBOL(drm_atomic_helper_swap_state); 1327 1328 /** 1329 * drm_atomic_helper_update_plane - Helper for primary plane update using atomic 1330 * @plane: plane object to update 1331 * @crtc: owning CRTC of owning plane 1332 * @fb: framebuffer to flip onto plane 1333 * @crtc_x: x offset of primary plane on crtc 1334 * @crtc_y: y offset of primary plane on crtc 1335 * @crtc_w: width of primary plane rectangle on crtc 1336 * @crtc_h: height of primary plane rectangle on crtc 1337 * @src_x: x offset of @fb for panning 1338 * @src_y: y offset of @fb for panning 1339 * @src_w: width of source rectangle in @fb 1340 * @src_h: height of source rectangle in @fb 1341 * 1342 * Provides a default plane update handler using the atomic driver interface. 1343 * 1344 * RETURNS: 1345 * Zero on success, error code on failure 1346 */ 1347 int drm_atomic_helper_update_plane(struct drm_plane *plane, 1348 struct drm_crtc *crtc, 1349 struct drm_framebuffer *fb, 1350 int crtc_x, int crtc_y, 1351 unsigned int crtc_w, unsigned int crtc_h, 1352 uint32_t src_x, uint32_t src_y, 1353 uint32_t src_w, uint32_t src_h) 1354 { 1355 struct drm_atomic_state *state; 1356 struct drm_plane_state *plane_state; 1357 int ret = 0; 1358 1359 state = drm_atomic_state_alloc(plane->dev); 1360 if (!state) 1361 return -ENOMEM; 1362 1363 state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); 1364 retry: 1365 plane_state = drm_atomic_get_plane_state(state, plane); 1366 if (IS_ERR(plane_state)) { 1367 ret = PTR_ERR(plane_state); 1368 goto fail; 1369 } 1370 1371 ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); 1372 if (ret != 0) 1373 goto fail; 1374 drm_atomic_set_fb_for_plane(plane_state, fb); 1375 plane_state->crtc_x = crtc_x; 1376 plane_state->crtc_y = crtc_y; 1377 plane_state->crtc_h = crtc_h; 1378 plane_state->crtc_w = crtc_w; 1379 plane_state->src_x = src_x; 1380 plane_state->src_y = src_y; 1381 plane_state->src_h = src_h; 1382 plane_state->src_w = src_w; 1383 1384 ret = drm_atomic_commit(state); 1385 if (ret != 0) 1386 goto fail; 1387 1388 if (plane == crtc->cursor) 1389 state->legacy_cursor_update = true; 1390 1391 /* Driver takes ownership of state on successful commit. */ 1392 return 0; 1393 fail: 1394 if (ret == -EDEADLK) 1395 goto backoff; 1396 1397 drm_atomic_state_free(state); 1398 1399 return ret; 1400 backoff: 1401 drm_atomic_state_clear(state); 1402 drm_atomic_legacy_backoff(state); 1403 1404 /* 1405 * Someone might have exchanged the framebuffer while we dropped locks 1406 * in the backoff code. We need to fix up the fb refcount tracking the 1407 * core does for us. 1408 */ 1409 plane->old_fb = plane->fb; 1410 1411 goto retry; 1412 } 1413 EXPORT_SYMBOL(drm_atomic_helper_update_plane); 1414 1415 /** 1416 * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic 1417 * @plane: plane to disable 1418 * 1419 * Provides a default plane disable handler using the atomic driver interface. 1420 * 1421 * RETURNS: 1422 * Zero on success, error code on failure 1423 */ 1424 int drm_atomic_helper_disable_plane(struct drm_plane *plane) 1425 { 1426 struct drm_atomic_state *state; 1427 struct drm_plane_state *plane_state; 1428 int ret = 0; 1429 1430 /* 1431 * FIXME: Without plane->crtc set we can't get at the implicit legacy 1432 * acquire context. The real fix will be to wire the acquire ctx through 1433 * everywhere we need it, but meanwhile prevent chaos by just skipping 1434 * this noop. The critical case is the cursor ioctls which a) only grab 1435 * crtc/cursor-plane locks (so we need the crtc to get at the right 1436 * acquire context) and b) can try to disable the plane multiple times. 1437 */ 1438 if (!plane->crtc) 1439 return 0; 1440 1441 state = drm_atomic_state_alloc(plane->dev); 1442 if (!state) 1443 return -ENOMEM; 1444 1445 state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); 1446 retry: 1447 plane_state = drm_atomic_get_plane_state(state, plane); 1448 if (IS_ERR(plane_state)) { 1449 ret = PTR_ERR(plane_state); 1450 goto fail; 1451 } 1452 1453 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); 1454 if (ret != 0) 1455 goto fail; 1456 drm_atomic_set_fb_for_plane(plane_state, NULL); 1457 plane_state->crtc_x = 0; 1458 plane_state->crtc_y = 0; 1459 plane_state->crtc_h = 0; 1460 plane_state->crtc_w = 0; 1461 plane_state->src_x = 0; 1462 plane_state->src_y = 0; 1463 plane_state->src_h = 0; 1464 plane_state->src_w = 0; 1465 1466 if (plane == plane->crtc->cursor) 1467 state->legacy_cursor_update = true; 1468 1469 ret = drm_atomic_commit(state); 1470 if (ret != 0) 1471 goto fail; 1472 1473 /* Driver takes ownership of state on successful commit. */ 1474 return 0; 1475 fail: 1476 if (ret == -EDEADLK) 1477 goto backoff; 1478 1479 drm_atomic_state_free(state); 1480 1481 return ret; 1482 backoff: 1483 drm_atomic_state_clear(state); 1484 drm_atomic_legacy_backoff(state); 1485 1486 /* 1487 * Someone might have exchanged the framebuffer while we dropped locks 1488 * in the backoff code. We need to fix up the fb refcount tracking the 1489 * core does for us. 1490 */ 1491 plane->old_fb = plane->fb; 1492 1493 goto retry; 1494 } 1495 EXPORT_SYMBOL(drm_atomic_helper_disable_plane); 1496 1497 static int update_output_state(struct drm_atomic_state *state, 1498 struct drm_mode_set *set) 1499 { 1500 struct drm_device *dev = set->crtc->dev; 1501 struct drm_connector_state *conn_state; 1502 int ncrtcs = state->dev->mode_config.num_crtc; 1503 int ret, i, j; 1504 1505 ret = drm_modeset_lock(&dev->mode_config.connection_mutex, 1506 state->acquire_ctx); 1507 if (ret) 1508 return ret; 1509 1510 /* First grab all affected connector/crtc states. */ 1511 for (i = 0; i < set->num_connectors; i++) { 1512 conn_state = drm_atomic_get_connector_state(state, 1513 set->connectors[i]); 1514 if (IS_ERR(conn_state)) 1515 return PTR_ERR(conn_state); 1516 } 1517 1518 for (i = 0; i < ncrtcs; i++) { 1519 struct drm_crtc *crtc = state->crtcs[i]; 1520 1521 if (!crtc) 1522 continue; 1523 1524 ret = drm_atomic_add_affected_connectors(state, crtc); 1525 if (ret) 1526 return ret; 1527 } 1528 1529 /* Then recompute connector->crtc links and crtc enabling state. */ 1530 for (i = 0; i < state->num_connector; i++) { 1531 struct drm_connector *connector; 1532 1533 connector = state->connectors[i]; 1534 conn_state = state->connector_states[i]; 1535 1536 if (!connector) 1537 continue; 1538 1539 if (conn_state->crtc == set->crtc) { 1540 ret = drm_atomic_set_crtc_for_connector(conn_state, 1541 NULL); 1542 if (ret) 1543 return ret; 1544 } 1545 1546 for (j = 0; j < set->num_connectors; j++) { 1547 if (set->connectors[j] == connector) { 1548 ret = drm_atomic_set_crtc_for_connector(conn_state, 1549 set->crtc); 1550 if (ret) 1551 return ret; 1552 break; 1553 } 1554 } 1555 } 1556 1557 for (i = 0; i < ncrtcs; i++) { 1558 struct drm_crtc *crtc = state->crtcs[i]; 1559 struct drm_crtc_state *crtc_state = state->crtc_states[i]; 1560 1561 if (!crtc) 1562 continue; 1563 1564 /* Don't update ->enable for the CRTC in the set_config request, 1565 * since a mismatch would indicate a bug in the upper layers. 1566 * The actual modeset code later on will catch any 1567 * inconsistencies here. */ 1568 if (crtc == set->crtc) 1569 continue; 1570 1571 crtc_state->enable = 1572 drm_atomic_connectors_for_crtc(state, crtc); 1573 } 1574 1575 return 0; 1576 } 1577 1578 /** 1579 * drm_atomic_helper_set_config - set a new config from userspace 1580 * @set: mode set configuration 1581 * 1582 * Provides a default crtc set_config handler using the atomic driver interface. 1583 * 1584 * Returns: 1585 * Returns 0 on success, negative errno numbers on failure. 1586 */ 1587 int drm_atomic_helper_set_config(struct drm_mode_set *set) 1588 { 1589 struct drm_atomic_state *state; 1590 struct drm_crtc *crtc = set->crtc; 1591 struct drm_crtc_state *crtc_state; 1592 struct drm_plane_state *primary_state; 1593 int ret = 0; 1594 1595 state = drm_atomic_state_alloc(crtc->dev); 1596 if (!state) 1597 return -ENOMEM; 1598 1599 state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); 1600 retry: 1601 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1602 if (IS_ERR(crtc_state)) { 1603 ret = PTR_ERR(crtc_state); 1604 goto fail; 1605 } 1606 1607 primary_state = drm_atomic_get_plane_state(state, crtc->primary); 1608 if (IS_ERR(primary_state)) { 1609 ret = PTR_ERR(primary_state); 1610 goto fail; 1611 } 1612 1613 if (!set->mode) { 1614 WARN_ON(set->fb); 1615 WARN_ON(set->num_connectors); 1616 1617 crtc_state->enable = false; 1618 crtc_state->active = false; 1619 1620 ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); 1621 if (ret != 0) 1622 goto fail; 1623 1624 drm_atomic_set_fb_for_plane(primary_state, NULL); 1625 1626 goto commit; 1627 } 1628 1629 WARN_ON(!set->fb); 1630 WARN_ON(!set->num_connectors); 1631 1632 crtc_state->enable = true; 1633 crtc_state->active = true; 1634 drm_mode_copy(&crtc_state->mode, set->mode); 1635 1636 ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); 1637 if (ret != 0) 1638 goto fail; 1639 drm_atomic_set_fb_for_plane(primary_state, set->fb); 1640 primary_state->crtc_x = 0; 1641 primary_state->crtc_y = 0; 1642 primary_state->crtc_h = set->mode->vdisplay; 1643 primary_state->crtc_w = set->mode->hdisplay; 1644 primary_state->src_x = set->x << 16; 1645 primary_state->src_y = set->y << 16; 1646 primary_state->src_h = set->mode->vdisplay << 16; 1647 primary_state->src_w = set->mode->hdisplay << 16; 1648 1649 commit: 1650 ret = update_output_state(state, set); 1651 if (ret) 1652 goto fail; 1653 1654 ret = drm_atomic_commit(state); 1655 if (ret != 0) 1656 goto fail; 1657 1658 /* Driver takes ownership of state on successful commit. */ 1659 return 0; 1660 fail: 1661 if (ret == -EDEADLK) 1662 goto backoff; 1663 1664 drm_atomic_state_free(state); 1665 1666 return ret; 1667 backoff: 1668 drm_atomic_state_clear(state); 1669 drm_atomic_legacy_backoff(state); 1670 1671 /* 1672 * Someone might have exchanged the framebuffer while we dropped locks 1673 * in the backoff code. We need to fix up the fb refcount tracking the 1674 * core does for us. 1675 */ 1676 crtc->primary->old_fb = crtc->primary->fb; 1677 1678 goto retry; 1679 } 1680 EXPORT_SYMBOL(drm_atomic_helper_set_config); 1681 1682 /** 1683 * drm_atomic_helper_crtc_set_property - helper for crtc prorties 1684 * @crtc: DRM crtc 1685 * @property: DRM property 1686 * @val: value of property 1687 * 1688 * Provides a default plane disablle handler using the atomic driver interface. 1689 * 1690 * RETURNS: 1691 * Zero on success, error code on failure 1692 */ 1693 int 1694 drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, 1695 struct drm_property *property, 1696 uint64_t val) 1697 { 1698 struct drm_atomic_state *state; 1699 struct drm_crtc_state *crtc_state; 1700 int ret = 0; 1701 1702 state = drm_atomic_state_alloc(crtc->dev); 1703 if (!state) 1704 return -ENOMEM; 1705 1706 /* ->set_property is always called with all locks held. */ 1707 state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; 1708 retry: 1709 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1710 if (IS_ERR(crtc_state)) { 1711 ret = PTR_ERR(crtc_state); 1712 goto fail; 1713 } 1714 1715 ret = drm_atomic_crtc_set_property(crtc, crtc_state, 1716 property, val); 1717 if (ret) 1718 goto fail; 1719 1720 ret = drm_atomic_commit(state); 1721 if (ret != 0) 1722 goto fail; 1723 1724 /* Driver takes ownership of state on successful commit. */ 1725 return 0; 1726 fail: 1727 if (ret == -EDEADLK) 1728 goto backoff; 1729 1730 drm_atomic_state_free(state); 1731 1732 return ret; 1733 backoff: 1734 drm_atomic_state_clear(state); 1735 drm_atomic_legacy_backoff(state); 1736 1737 goto retry; 1738 } 1739 EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); 1740 1741 /** 1742 * drm_atomic_helper_plane_set_property - helper for plane prorties 1743 * @plane: DRM plane 1744 * @property: DRM property 1745 * @val: value of property 1746 * 1747 * Provides a default plane disable handler using the atomic driver interface. 1748 * 1749 * RETURNS: 1750 * Zero on success, error code on failure 1751 */ 1752 int 1753 drm_atomic_helper_plane_set_property(struct drm_plane *plane, 1754 struct drm_property *property, 1755 uint64_t val) 1756 { 1757 struct drm_atomic_state *state; 1758 struct drm_plane_state *plane_state; 1759 int ret = 0; 1760 1761 state = drm_atomic_state_alloc(plane->dev); 1762 if (!state) 1763 return -ENOMEM; 1764 1765 /* ->set_property is always called with all locks held. */ 1766 state->acquire_ctx = plane->dev->mode_config.acquire_ctx; 1767 retry: 1768 plane_state = drm_atomic_get_plane_state(state, plane); 1769 if (IS_ERR(plane_state)) { 1770 ret = PTR_ERR(plane_state); 1771 goto fail; 1772 } 1773 1774 ret = drm_atomic_plane_set_property(plane, plane_state, 1775 property, val); 1776 if (ret) 1777 goto fail; 1778 1779 ret = drm_atomic_commit(state); 1780 if (ret != 0) 1781 goto fail; 1782 1783 /* Driver takes ownership of state on successful commit. */ 1784 return 0; 1785 fail: 1786 if (ret == -EDEADLK) 1787 goto backoff; 1788 1789 drm_atomic_state_free(state); 1790 1791 return ret; 1792 backoff: 1793 drm_atomic_state_clear(state); 1794 drm_atomic_legacy_backoff(state); 1795 1796 goto retry; 1797 } 1798 EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); 1799 1800 /** 1801 * drm_atomic_helper_connector_set_property - helper for connector prorties 1802 * @connector: DRM connector 1803 * @property: DRM property 1804 * @val: value of property 1805 * 1806 * Provides a default plane disablle handler using the atomic driver interface. 1807 * 1808 * RETURNS: 1809 * Zero on success, error code on failure 1810 */ 1811 int 1812 drm_atomic_helper_connector_set_property(struct drm_connector *connector, 1813 struct drm_property *property, 1814 uint64_t val) 1815 { 1816 struct drm_atomic_state *state; 1817 struct drm_connector_state *connector_state; 1818 int ret = 0; 1819 1820 state = drm_atomic_state_alloc(connector->dev); 1821 if (!state) 1822 return -ENOMEM; 1823 1824 /* ->set_property is always called with all locks held. */ 1825 state->acquire_ctx = connector->dev->mode_config.acquire_ctx; 1826 retry: 1827 connector_state = drm_atomic_get_connector_state(state, connector); 1828 if (IS_ERR(connector_state)) { 1829 ret = PTR_ERR(connector_state); 1830 goto fail; 1831 } 1832 1833 ret = drm_atomic_connector_set_property(connector, connector_state, 1834 property, val); 1835 if (ret) 1836 goto fail; 1837 1838 ret = drm_atomic_commit(state); 1839 if (ret != 0) 1840 goto fail; 1841 1842 /* Driver takes ownership of state on successful commit. */ 1843 return 0; 1844 fail: 1845 if (ret == -EDEADLK) 1846 goto backoff; 1847 1848 drm_atomic_state_free(state); 1849 1850 return ret; 1851 backoff: 1852 drm_atomic_state_clear(state); 1853 drm_atomic_legacy_backoff(state); 1854 1855 goto retry; 1856 } 1857 EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); 1858 1859 /** 1860 * drm_atomic_helper_page_flip - execute a legacy page flip 1861 * @crtc: DRM crtc 1862 * @fb: DRM framebuffer 1863 * @event: optional DRM event to signal upon completion 1864 * @flags: flip flags for non-vblank sync'ed updates 1865 * 1866 * Provides a default page flip implementation using the atomic driver interface. 1867 * 1868 * Note that for now so called async page flips (i.e. updates which are not 1869 * synchronized to vblank) are not supported, since the atomic interfaces have 1870 * no provisions for this yet. 1871 * 1872 * Returns: 1873 * Returns 0 on success, negative errno numbers on failure. 1874 */ 1875 int drm_atomic_helper_page_flip(struct drm_crtc *crtc, 1876 struct drm_framebuffer *fb, 1877 struct drm_pending_vblank_event *event, 1878 uint32_t flags) 1879 { 1880 struct drm_plane *plane = crtc->primary; 1881 struct drm_atomic_state *state; 1882 struct drm_plane_state *plane_state; 1883 struct drm_crtc_state *crtc_state; 1884 int ret = 0; 1885 1886 if (flags & DRM_MODE_PAGE_FLIP_ASYNC) 1887 return -EINVAL; 1888 1889 state = drm_atomic_state_alloc(plane->dev); 1890 if (!state) 1891 return -ENOMEM; 1892 1893 state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); 1894 retry: 1895 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1896 if (IS_ERR(crtc_state)) { 1897 ret = PTR_ERR(crtc_state); 1898 goto fail; 1899 } 1900 crtc_state->event = event; 1901 1902 plane_state = drm_atomic_get_plane_state(state, plane); 1903 if (IS_ERR(plane_state)) { 1904 ret = PTR_ERR(plane_state); 1905 goto fail; 1906 } 1907 1908 ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); 1909 if (ret != 0) 1910 goto fail; 1911 drm_atomic_set_fb_for_plane(plane_state, fb); 1912 1913 ret = drm_atomic_async_commit(state); 1914 if (ret != 0) 1915 goto fail; 1916 1917 /* TODO: ->page_flip is the only driver callback where the core 1918 * doesn't update plane->fb. For now patch it up here. */ 1919 plane->fb = plane->state->fb; 1920 1921 /* Driver takes ownership of state on successful async commit. */ 1922 return 0; 1923 fail: 1924 if (ret == -EDEADLK) 1925 goto backoff; 1926 1927 drm_atomic_state_free(state); 1928 1929 return ret; 1930 backoff: 1931 drm_atomic_state_clear(state); 1932 drm_atomic_legacy_backoff(state); 1933 1934 /* 1935 * Someone might have exchanged the framebuffer while we dropped locks 1936 * in the backoff code. We need to fix up the fb refcount tracking the 1937 * core does for us. 1938 */ 1939 plane->old_fb = plane->fb; 1940 1941 goto retry; 1942 } 1943 EXPORT_SYMBOL(drm_atomic_helper_page_flip); 1944 1945 /** 1946 * drm_atomic_helper_connector_dpms() - connector dpms helper implementation 1947 * @connector: affected connector 1948 * @mode: DPMS mode 1949 * 1950 * This is the main helper function provided by the atomic helper framework for 1951 * implementing the legacy DPMS connector interface. It computes the new desired 1952 * ->active state for the corresponding CRTC (if the connector is enabled) and 1953 * updates it. 1954 */ 1955 void drm_atomic_helper_connector_dpms(struct drm_connector *connector, 1956 int mode) 1957 { 1958 struct drm_mode_config *config = &connector->dev->mode_config; 1959 struct drm_atomic_state *state; 1960 struct drm_crtc_state *crtc_state; 1961 struct drm_crtc *crtc; 1962 struct drm_connector *tmp_connector; 1963 int ret; 1964 bool active = false; 1965 1966 if (mode != DRM_MODE_DPMS_ON) 1967 mode = DRM_MODE_DPMS_OFF; 1968 1969 connector->dpms = mode; 1970 crtc = connector->state->crtc; 1971 1972 if (!crtc) 1973 return; 1974 1975 /* FIXME: ->dpms has no return value so can't forward the -ENOMEM. */ 1976 state = drm_atomic_state_alloc(connector->dev); 1977 if (!state) 1978 return; 1979 1980 state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); 1981 retry: 1982 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1983 if (IS_ERR(crtc_state)) 1984 return; 1985 1986 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 1987 1988 list_for_each_entry(tmp_connector, &config->connector_list, head) { 1989 if (connector->state->crtc != crtc) 1990 continue; 1991 1992 if (connector->dpms == DRM_MODE_DPMS_ON) { 1993 active = true; 1994 break; 1995 } 1996 } 1997 crtc_state->active = active; 1998 1999 ret = drm_atomic_commit(state); 2000 if (ret != 0) 2001 goto fail; 2002 2003 /* Driver takes ownership of state on successful async commit. */ 2004 return; 2005 fail: 2006 if (ret == -EDEADLK) 2007 goto backoff; 2008 2009 drm_atomic_state_free(state); 2010 2011 WARN(1, "Driver bug: Changing ->active failed with ret=%i\n", ret); 2012 2013 return; 2014 backoff: 2015 drm_atomic_state_clear(state); 2016 drm_atomic_legacy_backoff(state); 2017 2018 goto retry; 2019 } 2020 EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); 2021 2022 /** 2023 * DOC: atomic state reset and initialization 2024 * 2025 * Both the drm core and the atomic helpers assume that there is always the full 2026 * and correct atomic software state for all connectors, CRTCs and planes 2027 * available. Which is a bit a problem on driver load and also after system 2028 * suspend. One way to solve this is to have a hardware state read-out 2029 * infrastructure which reconstructs the full software state (e.g. the i915 2030 * driver). 2031 * 2032 * The simpler solution is to just reset the software state to everything off, 2033 * which is easiest to do by calling drm_mode_config_reset(). To facilitate this 2034 * the atomic helpers provide default reset implementations for all hooks. 2035 */ 2036 2037 /** 2038 * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs 2039 * @crtc: drm CRTC 2040 * 2041 * Resets the atomic state for @crtc by freeing the state pointer (which might 2042 * be NULL, e.g. at driver load time) and allocating a new empty state object. 2043 */ 2044 void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) 2045 { 2046 kfree(crtc->state); 2047 crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); 2048 2049 if (crtc->state) 2050 crtc->state->crtc = crtc; 2051 } 2052 EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); 2053 2054 /** 2055 * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook 2056 * @crtc: drm CRTC 2057 * 2058 * Default CRTC state duplicate hook for drivers which don't have their own 2059 * subclassed CRTC state structure. 2060 */ 2061 struct drm_crtc_state * 2062 drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) 2063 { 2064 struct drm_crtc_state *state; 2065 2066 if (WARN_ON(!crtc->state)) 2067 return NULL; 2068 2069 state = kmemdup(crtc->state, sizeof(*crtc->state), GFP_KERNEL); 2070 2071 if (state) { 2072 state->mode_changed = false; 2073 state->active_changed = false; 2074 state->planes_changed = false; 2075 state->event = NULL; 2076 } 2077 2078 return state; 2079 } 2080 EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); 2081 2082 /** 2083 * drm_atomic_helper_crtc_destroy_state - default state destroy hook 2084 * @crtc: drm CRTC 2085 * @state: CRTC state object to release 2086 * 2087 * Default CRTC state destroy hook for drivers which don't have their own 2088 * subclassed CRTC state structure. 2089 */ 2090 void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, 2091 struct drm_crtc_state *state) 2092 { 2093 kfree(state); 2094 } 2095 EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); 2096 2097 /** 2098 * drm_atomic_helper_plane_reset - default ->reset hook for planes 2099 * @plane: drm plane 2100 * 2101 * Resets the atomic state for @plane by freeing the state pointer (which might 2102 * be NULL, e.g. at driver load time) and allocating a new empty state object. 2103 */ 2104 void drm_atomic_helper_plane_reset(struct drm_plane *plane) 2105 { 2106 if (plane->state && plane->state->fb) 2107 drm_framebuffer_unreference(plane->state->fb); 2108 2109 kfree(plane->state); 2110 plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); 2111 2112 if (plane->state) 2113 plane->state->plane = plane; 2114 } 2115 EXPORT_SYMBOL(drm_atomic_helper_plane_reset); 2116 2117 /** 2118 * drm_atomic_helper_plane_duplicate_state - default state duplicate hook 2119 * @plane: drm plane 2120 * 2121 * Default plane state duplicate hook for drivers which don't have their own 2122 * subclassed plane state structure. 2123 */ 2124 struct drm_plane_state * 2125 drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) 2126 { 2127 struct drm_plane_state *state; 2128 2129 if (WARN_ON(!plane->state)) 2130 return NULL; 2131 2132 state = kmemdup(plane->state, sizeof(*plane->state), GFP_KERNEL); 2133 2134 if (state && state->fb) 2135 drm_framebuffer_reference(state->fb); 2136 2137 return state; 2138 } 2139 EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); 2140 2141 /** 2142 * drm_atomic_helper_plane_destroy_state - default state destroy hook 2143 * @plane: drm plane 2144 * @state: plane state object to release 2145 * 2146 * Default plane state destroy hook for drivers which don't have their own 2147 * subclassed plane state structure. 2148 */ 2149 void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, 2150 struct drm_plane_state *state) 2151 { 2152 if (state->fb) 2153 drm_framebuffer_unreference(state->fb); 2154 2155 kfree(state); 2156 } 2157 EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); 2158 2159 /** 2160 * drm_atomic_helper_connector_reset - default ->reset hook for connectors 2161 * @connector: drm connector 2162 * 2163 * Resets the atomic state for @connector by freeing the state pointer (which 2164 * might be NULL, e.g. at driver load time) and allocating a new empty state 2165 * object. 2166 */ 2167 void drm_atomic_helper_connector_reset(struct drm_connector *connector) 2168 { 2169 kfree(connector->state); 2170 connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL); 2171 2172 if (connector->state) 2173 connector->state->connector = connector; 2174 } 2175 EXPORT_SYMBOL(drm_atomic_helper_connector_reset); 2176 2177 /** 2178 * drm_atomic_helper_connector_duplicate_state - default state duplicate hook 2179 * @connector: drm connector 2180 * 2181 * Default connector state duplicate hook for drivers which don't have their own 2182 * subclassed connector state structure. 2183 */ 2184 struct drm_connector_state * 2185 drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) 2186 { 2187 if (WARN_ON(!connector->state)) 2188 return NULL; 2189 2190 return kmemdup(connector->state, sizeof(*connector->state), GFP_KERNEL); 2191 } 2192 EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); 2193 2194 /** 2195 * drm_atomic_helper_connector_destroy_state - default state destroy hook 2196 * @connector: drm connector 2197 * @state: connector state object to release 2198 * 2199 * Default connector state destroy hook for drivers which don't have their own 2200 * subclassed connector state structure. 2201 */ 2202 void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, 2203 struct drm_connector_state *state) 2204 { 2205 kfree(state); 2206 } 2207 EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); 2208