1 /* 2 * Copyright (C) 2014 Red Hat 3 * Copyright (C) 2014 Intel Corp. 4 * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: 25 * Rob Clark <robdclark@gmail.com> 26 * Daniel Vetter <daniel.vetter@ffwll.ch> 27 */ 28 29 30 #include <linux/sync_file.h> 31 32 #include <drm/drm_atomic.h> 33 #include <drm/drm_atomic_uapi.h> 34 #include <drm/drm_bridge.h> 35 #include <drm/drm_debugfs.h> 36 #include <drm/drm_device.h> 37 #include <drm/drm_drv.h> 38 #include <drm/drm_file.h> 39 #include <drm/drm_fourcc.h> 40 #include <drm/drm_mode.h> 41 #include <drm/drm_print.h> 42 #include <drm/drm_writeback.h> 43 44 #include "drm_crtc_internal.h" 45 #include "drm_internal.h" 46 47 void __drm_crtc_commit_free(struct kref *kref) 48 { 49 struct drm_crtc_commit *commit = 50 container_of(kref, struct drm_crtc_commit, ref); 51 52 kfree(commit); 53 } 54 EXPORT_SYMBOL(__drm_crtc_commit_free); 55 56 /** 57 * drm_crtc_commit_wait - Waits for a commit to complete 58 * @commit: &drm_crtc_commit to wait for 59 * 60 * Waits for a given &drm_crtc_commit to be programmed into the 61 * hardware and flipped to. 62 * 63 * Returns: 64 * 65 * 0 on success, a negative error code otherwise. 66 */ 67 int drm_crtc_commit_wait(struct drm_crtc_commit *commit) 68 { 69 unsigned long timeout = 10 * HZ; 70 int ret; 71 72 if (!commit) 73 return 0; 74 75 ret = wait_for_completion_timeout(&commit->hw_done, timeout); 76 if (!ret) { 77 DRM_ERROR("hw_done timed out\n"); 78 return -ETIMEDOUT; 79 } 80 81 /* 82 * Currently no support for overwriting flips, hence 83 * stall for previous one to execute completely. 84 */ 85 ret = wait_for_completion_timeout(&commit->flip_done, timeout); 86 if (!ret) { 87 DRM_ERROR("flip_done timed out\n"); 88 return -ETIMEDOUT; 89 } 90 91 return 0; 92 } 93 EXPORT_SYMBOL(drm_crtc_commit_wait); 94 95 /** 96 * drm_atomic_state_default_release - 97 * release memory initialized by drm_atomic_state_init 98 * @state: atomic state 99 * 100 * Free all the memory allocated by drm_atomic_state_init. 101 * This should only be used by drivers which are still subclassing 102 * &drm_atomic_state and haven't switched to &drm_private_state yet. 103 */ 104 void drm_atomic_state_default_release(struct drm_atomic_state *state) 105 { 106 kfree(state->connectors); 107 kfree(state->crtcs); 108 kfree(state->planes); 109 kfree(state->private_objs); 110 } 111 EXPORT_SYMBOL(drm_atomic_state_default_release); 112 113 /** 114 * drm_atomic_state_init - init new atomic state 115 * @dev: DRM device 116 * @state: atomic state 117 * 118 * Default implementation for filling in a new atomic state. 119 * This should only be used by drivers which are still subclassing 120 * &drm_atomic_state and haven't switched to &drm_private_state yet. 121 */ 122 int 123 drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state) 124 { 125 kref_init(&state->ref); 126 127 /* TODO legacy paths should maybe do a better job about 128 * setting this appropriately? 129 */ 130 state->allow_modeset = true; 131 132 state->crtcs = kcalloc(dev->mode_config.num_crtc, 133 sizeof(*state->crtcs), GFP_KERNEL); 134 if (!state->crtcs) 135 goto fail; 136 state->planes = kcalloc(dev->mode_config.num_total_plane, 137 sizeof(*state->planes), GFP_KERNEL); 138 if (!state->planes) 139 goto fail; 140 141 state->dev = dev; 142 143 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state); 144 145 return 0; 146 fail: 147 drm_atomic_state_default_release(state); 148 return -ENOMEM; 149 } 150 EXPORT_SYMBOL(drm_atomic_state_init); 151 152 /** 153 * drm_atomic_state_alloc - allocate atomic state 154 * @dev: DRM device 155 * 156 * This allocates an empty atomic state to track updates. 157 */ 158 struct drm_atomic_state * 159 drm_atomic_state_alloc(struct drm_device *dev) 160 { 161 struct drm_mode_config *config = &dev->mode_config; 162 163 if (!config->funcs->atomic_state_alloc) { 164 struct drm_atomic_state *state; 165 166 state = kzalloc(sizeof(*state), GFP_KERNEL); 167 if (!state) 168 return NULL; 169 if (drm_atomic_state_init(dev, state) < 0) { 170 kfree(state); 171 return NULL; 172 } 173 return state; 174 } 175 176 return config->funcs->atomic_state_alloc(dev); 177 } 178 EXPORT_SYMBOL(drm_atomic_state_alloc); 179 180 /** 181 * drm_atomic_state_default_clear - clear base atomic state 182 * @state: atomic state 183 * 184 * Default implementation for clearing atomic state. 185 * This should only be used by drivers which are still subclassing 186 * &drm_atomic_state and haven't switched to &drm_private_state yet. 187 */ 188 void drm_atomic_state_default_clear(struct drm_atomic_state *state) 189 { 190 struct drm_device *dev = state->dev; 191 struct drm_mode_config *config = &dev->mode_config; 192 int i; 193 194 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state); 195 196 for (i = 0; i < state->num_connector; i++) { 197 struct drm_connector *connector = state->connectors[i].ptr; 198 199 if (!connector) 200 continue; 201 202 connector->funcs->atomic_destroy_state(connector, 203 state->connectors[i].state); 204 state->connectors[i].ptr = NULL; 205 state->connectors[i].state = NULL; 206 state->connectors[i].old_state = NULL; 207 state->connectors[i].new_state = NULL; 208 drm_connector_put(connector); 209 } 210 211 for (i = 0; i < config->num_crtc; i++) { 212 struct drm_crtc *crtc = state->crtcs[i].ptr; 213 214 if (!crtc) 215 continue; 216 217 crtc->funcs->atomic_destroy_state(crtc, 218 state->crtcs[i].state); 219 220 state->crtcs[i].ptr = NULL; 221 state->crtcs[i].state = NULL; 222 state->crtcs[i].old_state = NULL; 223 state->crtcs[i].new_state = NULL; 224 225 if (state->crtcs[i].commit) { 226 drm_crtc_commit_put(state->crtcs[i].commit); 227 state->crtcs[i].commit = NULL; 228 } 229 } 230 231 for (i = 0; i < config->num_total_plane; i++) { 232 struct drm_plane *plane = state->planes[i].ptr; 233 234 if (!plane) 235 continue; 236 237 plane->funcs->atomic_destroy_state(plane, 238 state->planes[i].state); 239 state->planes[i].ptr = NULL; 240 state->planes[i].state = NULL; 241 state->planes[i].old_state = NULL; 242 state->planes[i].new_state = NULL; 243 } 244 245 for (i = 0; i < state->num_private_objs; i++) { 246 struct drm_private_obj *obj = state->private_objs[i].ptr; 247 248 obj->funcs->atomic_destroy_state(obj, 249 state->private_objs[i].state); 250 state->private_objs[i].ptr = NULL; 251 state->private_objs[i].state = NULL; 252 state->private_objs[i].old_state = NULL; 253 state->private_objs[i].new_state = NULL; 254 } 255 state->num_private_objs = 0; 256 257 if (state->fake_commit) { 258 drm_crtc_commit_put(state->fake_commit); 259 state->fake_commit = NULL; 260 } 261 } 262 EXPORT_SYMBOL(drm_atomic_state_default_clear); 263 264 /** 265 * drm_atomic_state_clear - clear state object 266 * @state: atomic state 267 * 268 * When the w/w mutex algorithm detects a deadlock we need to back off and drop 269 * all locks. So someone else could sneak in and change the current modeset 270 * configuration. Which means that all the state assembled in @state is no 271 * longer an atomic update to the current state, but to some arbitrary earlier 272 * state. Which could break assumptions the driver's 273 * &drm_mode_config_funcs.atomic_check likely relies on. 274 * 275 * Hence we must clear all cached state and completely start over, using this 276 * function. 277 */ 278 void drm_atomic_state_clear(struct drm_atomic_state *state) 279 { 280 struct drm_device *dev = state->dev; 281 struct drm_mode_config *config = &dev->mode_config; 282 283 if (config->funcs->atomic_state_clear) 284 config->funcs->atomic_state_clear(state); 285 else 286 drm_atomic_state_default_clear(state); 287 } 288 EXPORT_SYMBOL(drm_atomic_state_clear); 289 290 /** 291 * __drm_atomic_state_free - free all memory for an atomic state 292 * @ref: This atomic state to deallocate 293 * 294 * This frees all memory associated with an atomic state, including all the 295 * per-object state for planes, CRTCs and connectors. 296 */ 297 void __drm_atomic_state_free(struct kref *ref) 298 { 299 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref); 300 struct drm_mode_config *config = &state->dev->mode_config; 301 302 drm_atomic_state_clear(state); 303 304 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state); 305 306 if (config->funcs->atomic_state_free) { 307 config->funcs->atomic_state_free(state); 308 } else { 309 drm_atomic_state_default_release(state); 310 kfree(state); 311 } 312 } 313 EXPORT_SYMBOL(__drm_atomic_state_free); 314 315 /** 316 * drm_atomic_get_crtc_state - get CRTC state 317 * @state: global atomic state object 318 * @crtc: CRTC to get state object for 319 * 320 * This function returns the CRTC state for the given CRTC, allocating it if 321 * needed. It will also grab the relevant CRTC lock to make sure that the state 322 * is consistent. 323 * 324 * WARNING: Drivers may only add new CRTC states to a @state if 325 * drm_atomic_state.allow_modeset is set, or if it's a driver-internal commit 326 * not created by userspace through an IOCTL call. 327 * 328 * Returns: 329 * 330 * Either the allocated state or the error code encoded into the pointer. When 331 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the 332 * entire atomic sequence must be restarted. All other errors are fatal. 333 */ 334 struct drm_crtc_state * 335 drm_atomic_get_crtc_state(struct drm_atomic_state *state, 336 struct drm_crtc *crtc) 337 { 338 int ret, index = drm_crtc_index(crtc); 339 struct drm_crtc_state *crtc_state; 340 341 WARN_ON(!state->acquire_ctx); 342 343 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); 344 if (crtc_state) 345 return crtc_state; 346 347 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx); 348 if (ret) 349 return ERR_PTR(ret); 350 351 crtc_state = crtc->funcs->atomic_duplicate_state(crtc); 352 if (!crtc_state) 353 return ERR_PTR(-ENOMEM); 354 355 state->crtcs[index].state = crtc_state; 356 state->crtcs[index].old_state = crtc->state; 357 state->crtcs[index].new_state = crtc_state; 358 state->crtcs[index].ptr = crtc; 359 crtc_state->state = state; 360 361 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n", 362 crtc->base.id, crtc->name, crtc_state, state); 363 364 return crtc_state; 365 } 366 EXPORT_SYMBOL(drm_atomic_get_crtc_state); 367 368 static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state, 369 const struct drm_crtc_state *new_crtc_state) 370 { 371 struct drm_crtc *crtc = new_crtc_state->crtc; 372 373 /* NOTE: we explicitly don't enforce constraints such as primary 374 * layer covering entire screen, since that is something we want 375 * to allow (on hw that supports it). For hw that does not, it 376 * should be checked in driver's crtc->atomic_check() vfunc. 377 * 378 * TODO: Add generic modeset state checks once we support those. 379 */ 380 381 if (new_crtc_state->active && !new_crtc_state->enable) { 382 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n", 383 crtc->base.id, crtc->name); 384 return -EINVAL; 385 } 386 387 /* The state->enable vs. state->mode_blob checks can be WARN_ON, 388 * as this is a kernel-internal detail that userspace should never 389 * be able to trigger. 390 */ 391 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && 392 WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) { 393 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n", 394 crtc->base.id, crtc->name); 395 return -EINVAL; 396 } 397 398 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && 399 WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) { 400 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n", 401 crtc->base.id, crtc->name); 402 return -EINVAL; 403 } 404 405 /* 406 * Reject event generation for when a CRTC is off and stays off. 407 * It wouldn't be hard to implement this, but userspace has a track 408 * record of happily burning through 100% cpu (or worse, crash) when the 409 * display pipe is suspended. To avoid all that fun just reject updates 410 * that ask for events since likely that indicates a bug in the 411 * compositor's drawing loop. This is consistent with the vblank IOCTL 412 * and legacy page_flip IOCTL which also reject service on a disabled 413 * pipe. 414 */ 415 if (new_crtc_state->event && 416 !new_crtc_state->active && !old_crtc_state->active) { 417 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n", 418 crtc->base.id, crtc->name); 419 return -EINVAL; 420 } 421 422 return 0; 423 } 424 425 static void drm_atomic_crtc_print_state(struct drm_printer *p, 426 const struct drm_crtc_state *state) 427 { 428 struct drm_crtc *crtc = state->crtc; 429 430 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name); 431 drm_printf(p, "\tenable=%d\n", state->enable); 432 drm_printf(p, "\tactive=%d\n", state->active); 433 drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active); 434 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed); 435 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed); 436 drm_printf(p, "\tactive_changed=%d\n", state->active_changed); 437 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed); 438 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed); 439 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask); 440 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask); 441 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask); 442 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode)); 443 444 if (crtc->funcs->atomic_print_state) 445 crtc->funcs->atomic_print_state(p, state); 446 } 447 448 static int drm_atomic_connector_check(struct drm_connector *connector, 449 struct drm_connector_state *state) 450 { 451 struct drm_crtc_state *crtc_state; 452 struct drm_writeback_job *writeback_job = state->writeback_job; 453 const struct drm_display_info *info = &connector->display_info; 454 455 state->max_bpc = info->bpc ? info->bpc : 8; 456 if (connector->max_bpc_property) 457 state->max_bpc = min(state->max_bpc, state->max_requested_bpc); 458 459 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job) 460 return 0; 461 462 if (writeback_job->fb && !state->crtc) { 463 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n", 464 connector->base.id, connector->name); 465 return -EINVAL; 466 } 467 468 if (state->crtc) 469 crtc_state = drm_atomic_get_existing_crtc_state(state->state, 470 state->crtc); 471 472 if (writeback_job->fb && !crtc_state->active) { 473 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n", 474 connector->base.id, connector->name, 475 state->crtc->base.id); 476 return -EINVAL; 477 } 478 479 if (!writeback_job->fb) { 480 if (writeback_job->out_fence) { 481 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n", 482 connector->base.id, connector->name); 483 return -EINVAL; 484 } 485 486 drm_writeback_cleanup_job(writeback_job); 487 state->writeback_job = NULL; 488 } 489 490 return 0; 491 } 492 493 /** 494 * drm_atomic_get_plane_state - get plane state 495 * @state: global atomic state object 496 * @plane: plane to get state object for 497 * 498 * This function returns the plane state for the given plane, allocating it if 499 * needed. It will also grab the relevant plane lock to make sure that the state 500 * is consistent. 501 * 502 * Returns: 503 * 504 * Either the allocated state or the error code encoded into the pointer. When 505 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the 506 * entire atomic sequence must be restarted. All other errors are fatal. 507 */ 508 struct drm_plane_state * 509 drm_atomic_get_plane_state(struct drm_atomic_state *state, 510 struct drm_plane *plane) 511 { 512 int ret, index = drm_plane_index(plane); 513 struct drm_plane_state *plane_state; 514 515 WARN_ON(!state->acquire_ctx); 516 517 /* the legacy pointers should never be set */ 518 WARN_ON(plane->fb); 519 WARN_ON(plane->old_fb); 520 WARN_ON(plane->crtc); 521 522 plane_state = drm_atomic_get_existing_plane_state(state, plane); 523 if (plane_state) 524 return plane_state; 525 526 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx); 527 if (ret) 528 return ERR_PTR(ret); 529 530 plane_state = plane->funcs->atomic_duplicate_state(plane); 531 if (!plane_state) 532 return ERR_PTR(-ENOMEM); 533 534 state->planes[index].state = plane_state; 535 state->planes[index].ptr = plane; 536 state->planes[index].old_state = plane->state; 537 state->planes[index].new_state = plane_state; 538 plane_state->state = state; 539 540 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n", 541 plane->base.id, plane->name, plane_state, state); 542 543 if (plane_state->crtc) { 544 struct drm_crtc_state *crtc_state; 545 546 crtc_state = drm_atomic_get_crtc_state(state, 547 plane_state->crtc); 548 if (IS_ERR(crtc_state)) 549 return ERR_CAST(crtc_state); 550 } 551 552 return plane_state; 553 } 554 EXPORT_SYMBOL(drm_atomic_get_plane_state); 555 556 static bool 557 plane_switching_crtc(const struct drm_plane_state *old_plane_state, 558 const struct drm_plane_state *new_plane_state) 559 { 560 if (!old_plane_state->crtc || !new_plane_state->crtc) 561 return false; 562 563 if (old_plane_state->crtc == new_plane_state->crtc) 564 return false; 565 566 /* This could be refined, but currently there's no helper or driver code 567 * to implement direct switching of active planes nor userspace to take 568 * advantage of more direct plane switching without the intermediate 569 * full OFF state. 570 */ 571 return true; 572 } 573 574 /** 575 * drm_atomic_plane_check - check plane state 576 * @old_plane_state: old plane state to check 577 * @new_plane_state: new plane state to check 578 * 579 * Provides core sanity checks for plane state. 580 * 581 * RETURNS: 582 * Zero on success, error code on failure 583 */ 584 static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state, 585 const struct drm_plane_state *new_plane_state) 586 { 587 struct drm_plane *plane = new_plane_state->plane; 588 struct drm_crtc *crtc = new_plane_state->crtc; 589 const struct drm_framebuffer *fb = new_plane_state->fb; 590 unsigned int fb_width, fb_height; 591 struct drm_mode_rect *clips; 592 uint32_t num_clips; 593 int ret; 594 595 /* either *both* CRTC and FB must be set, or neither */ 596 if (crtc && !fb) { 597 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n", 598 plane->base.id, plane->name); 599 return -EINVAL; 600 } else if (fb && !crtc) { 601 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n", 602 plane->base.id, plane->name); 603 return -EINVAL; 604 } 605 606 /* if disabled, we don't care about the rest of the state: */ 607 if (!crtc) 608 return 0; 609 610 /* Check whether this plane is usable on this CRTC */ 611 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 612 DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n", 613 crtc->base.id, crtc->name, 614 plane->base.id, plane->name); 615 return -EINVAL; 616 } 617 618 /* Check whether this plane supports the fb pixel format. */ 619 ret = drm_plane_check_pixel_format(plane, fb->format->format, 620 fb->modifier); 621 if (ret) { 622 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n", 623 plane->base.id, plane->name, 624 &fb->format->format, fb->modifier); 625 return ret; 626 } 627 628 /* Give drivers some help against integer overflows */ 629 if (new_plane_state->crtc_w > INT_MAX || 630 new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w || 631 new_plane_state->crtc_h > INT_MAX || 632 new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) { 633 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n", 634 plane->base.id, plane->name, 635 new_plane_state->crtc_w, new_plane_state->crtc_h, 636 new_plane_state->crtc_x, new_plane_state->crtc_y); 637 return -ERANGE; 638 } 639 640 fb_width = fb->width << 16; 641 fb_height = fb->height << 16; 642 643 /* Make sure source coordinates are inside the fb. */ 644 if (new_plane_state->src_w > fb_width || 645 new_plane_state->src_x > fb_width - new_plane_state->src_w || 646 new_plane_state->src_h > fb_height || 647 new_plane_state->src_y > fb_height - new_plane_state->src_h) { 648 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates " 649 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n", 650 plane->base.id, plane->name, 651 new_plane_state->src_w >> 16, 652 ((new_plane_state->src_w & 0xffff) * 15625) >> 10, 653 new_plane_state->src_h >> 16, 654 ((new_plane_state->src_h & 0xffff) * 15625) >> 10, 655 new_plane_state->src_x >> 16, 656 ((new_plane_state->src_x & 0xffff) * 15625) >> 10, 657 new_plane_state->src_y >> 16, 658 ((new_plane_state->src_y & 0xffff) * 15625) >> 10, 659 fb->width, fb->height); 660 return -ENOSPC; 661 } 662 663 clips = __drm_plane_get_damage_clips(new_plane_state); 664 num_clips = drm_plane_get_damage_clips_count(new_plane_state); 665 666 /* Make sure damage clips are valid and inside the fb. */ 667 while (num_clips > 0) { 668 if (clips->x1 >= clips->x2 || 669 clips->y1 >= clips->y2 || 670 clips->x1 < 0 || 671 clips->y1 < 0 || 672 clips->x2 > fb_width || 673 clips->y2 > fb_height) { 674 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid damage clip %d %d %d %d\n", 675 plane->base.id, plane->name, clips->x1, 676 clips->y1, clips->x2, clips->y2); 677 return -EINVAL; 678 } 679 clips++; 680 num_clips--; 681 } 682 683 if (plane_switching_crtc(old_plane_state, new_plane_state)) { 684 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n", 685 plane->base.id, plane->name); 686 return -EINVAL; 687 } 688 689 return 0; 690 } 691 692 static void drm_atomic_plane_print_state(struct drm_printer *p, 693 const struct drm_plane_state *state) 694 { 695 struct drm_plane *plane = state->plane; 696 struct drm_rect src = drm_plane_state_src(state); 697 struct drm_rect dest = drm_plane_state_dest(state); 698 699 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name); 700 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); 701 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0); 702 if (state->fb) 703 drm_framebuffer_print_info(p, 2, state->fb); 704 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest)); 705 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src)); 706 drm_printf(p, "\trotation=%x\n", state->rotation); 707 drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos); 708 drm_printf(p, "\tcolor-encoding=%s\n", 709 drm_get_color_encoding_name(state->color_encoding)); 710 drm_printf(p, "\tcolor-range=%s\n", 711 drm_get_color_range_name(state->color_range)); 712 713 if (plane->funcs->atomic_print_state) 714 plane->funcs->atomic_print_state(p, state); 715 } 716 717 /** 718 * DOC: handling driver private state 719 * 720 * Very often the DRM objects exposed to userspace in the atomic modeset api 721 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the 722 * underlying hardware. Especially for any kind of shared resources (e.g. shared 723 * clocks, scaler units, bandwidth and fifo limits shared among a group of 724 * planes or CRTCs, and so on) it makes sense to model these as independent 725 * objects. Drivers then need to do similar state tracking and commit ordering for 726 * such private (since not exposed to userpace) objects as the atomic core and 727 * helpers already provide for connectors, planes and CRTCs. 728 * 729 * To make this easier on drivers the atomic core provides some support to track 730 * driver private state objects using struct &drm_private_obj, with the 731 * associated state struct &drm_private_state. 732 * 733 * Similar to userspace-exposed objects, private state structures can be 734 * acquired by calling drm_atomic_get_private_obj_state(). This also takes care 735 * of locking, hence drivers should not have a need to call drm_modeset_lock() 736 * directly. Sequence of the actual hardware state commit is not handled, 737 * drivers might need to keep track of struct drm_crtc_commit within subclassed 738 * structure of &drm_private_state as necessary, e.g. similar to 739 * &drm_plane_state.commit. See also &drm_atomic_state.fake_commit. 740 * 741 * All private state structures contained in a &drm_atomic_state update can be 742 * iterated using for_each_oldnew_private_obj_in_state(), 743 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state(). 744 * Drivers are recommended to wrap these for each type of driver private state 745 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at 746 * least if they want to iterate over all objects of a given type. 747 * 748 * An earlier way to handle driver private state was by subclassing struct 749 * &drm_atomic_state. But since that encourages non-standard ways to implement 750 * the check/commit split atomic requires (by using e.g. "check and rollback or 751 * commit instead" of "duplicate state, check, then either commit or release 752 * duplicated state) it is deprecated in favour of using &drm_private_state. 753 */ 754 755 /** 756 * drm_atomic_private_obj_init - initialize private object 757 * @dev: DRM device this object will be attached to 758 * @obj: private object 759 * @state: initial private object state 760 * @funcs: pointer to the struct of function pointers that identify the object 761 * type 762 * 763 * Initialize the private object, which can be embedded into any 764 * driver private object that needs its own atomic state. 765 */ 766 void 767 drm_atomic_private_obj_init(struct drm_device *dev, 768 struct drm_private_obj *obj, 769 struct drm_private_state *state, 770 const struct drm_private_state_funcs *funcs) 771 { 772 memset(obj, 0, sizeof(*obj)); 773 774 drm_modeset_lock_init(&obj->lock); 775 776 obj->state = state; 777 obj->funcs = funcs; 778 list_add_tail(&obj->head, &dev->mode_config.privobj_list); 779 } 780 EXPORT_SYMBOL(drm_atomic_private_obj_init); 781 782 /** 783 * drm_atomic_private_obj_fini - finalize private object 784 * @obj: private object 785 * 786 * Finalize the private object. 787 */ 788 void 789 drm_atomic_private_obj_fini(struct drm_private_obj *obj) 790 { 791 list_del(&obj->head); 792 obj->funcs->atomic_destroy_state(obj, obj->state); 793 drm_modeset_lock_fini(&obj->lock); 794 } 795 EXPORT_SYMBOL(drm_atomic_private_obj_fini); 796 797 /** 798 * drm_atomic_get_private_obj_state - get private object state 799 * @state: global atomic state 800 * @obj: private object to get the state for 801 * 802 * This function returns the private object state for the given private object, 803 * allocating the state if needed. It will also grab the relevant private 804 * object lock to make sure that the state is consistent. 805 * 806 * RETURNS: 807 * 808 * Either the allocated state or the error code encoded into a pointer. 809 */ 810 struct drm_private_state * 811 drm_atomic_get_private_obj_state(struct drm_atomic_state *state, 812 struct drm_private_obj *obj) 813 { 814 int index, num_objs, i, ret; 815 size_t size; 816 struct __drm_private_objs_state *arr; 817 struct drm_private_state *obj_state; 818 819 for (i = 0; i < state->num_private_objs; i++) 820 if (obj == state->private_objs[i].ptr) 821 return state->private_objs[i].state; 822 823 ret = drm_modeset_lock(&obj->lock, state->acquire_ctx); 824 if (ret) 825 return ERR_PTR(ret); 826 827 num_objs = state->num_private_objs + 1; 828 size = sizeof(*state->private_objs) * num_objs; 829 arr = krealloc(state->private_objs, size, GFP_KERNEL); 830 if (!arr) 831 return ERR_PTR(-ENOMEM); 832 833 state->private_objs = arr; 834 index = state->num_private_objs; 835 memset(&state->private_objs[index], 0, sizeof(*state->private_objs)); 836 837 obj_state = obj->funcs->atomic_duplicate_state(obj); 838 if (!obj_state) 839 return ERR_PTR(-ENOMEM); 840 841 state->private_objs[index].state = obj_state; 842 state->private_objs[index].old_state = obj->state; 843 state->private_objs[index].new_state = obj_state; 844 state->private_objs[index].ptr = obj; 845 obj_state->state = state; 846 847 state->num_private_objs = num_objs; 848 849 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n", 850 obj, obj_state, state); 851 852 return obj_state; 853 } 854 EXPORT_SYMBOL(drm_atomic_get_private_obj_state); 855 856 /** 857 * drm_atomic_get_old_private_obj_state 858 * @state: global atomic state object 859 * @obj: private_obj to grab 860 * 861 * This function returns the old private object state for the given private_obj, 862 * or NULL if the private_obj is not part of the global atomic state. 863 */ 864 struct drm_private_state * 865 drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state, 866 struct drm_private_obj *obj) 867 { 868 int i; 869 870 for (i = 0; i < state->num_private_objs; i++) 871 if (obj == state->private_objs[i].ptr) 872 return state->private_objs[i].old_state; 873 874 return NULL; 875 } 876 EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state); 877 878 /** 879 * drm_atomic_get_new_private_obj_state 880 * @state: global atomic state object 881 * @obj: private_obj to grab 882 * 883 * This function returns the new private object state for the given private_obj, 884 * or NULL if the private_obj is not part of the global atomic state. 885 */ 886 struct drm_private_state * 887 drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state, 888 struct drm_private_obj *obj) 889 { 890 int i; 891 892 for (i = 0; i < state->num_private_objs; i++) 893 if (obj == state->private_objs[i].ptr) 894 return state->private_objs[i].new_state; 895 896 return NULL; 897 } 898 EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state); 899 900 /** 901 * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder 902 * @state: Atomic state 903 * @encoder: The encoder to fetch the connector state for 904 * 905 * This function finds and returns the connector that was connected to @encoder 906 * as specified by the @state. 907 * 908 * If there is no connector in @state which previously had @encoder connected to 909 * it, this function will return NULL. While this may seem like an invalid use 910 * case, it is sometimes useful to differentiate commits which had no prior 911 * connectors attached to @encoder vs ones that did (and to inspect their 912 * state). This is especially true in enable hooks because the pipeline has 913 * changed. 914 * 915 * Returns: The old connector connected to @encoder, or NULL if the encoder is 916 * not connected. 917 */ 918 struct drm_connector * 919 drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state, 920 struct drm_encoder *encoder) 921 { 922 struct drm_connector_state *conn_state; 923 struct drm_connector *connector; 924 unsigned int i; 925 926 for_each_old_connector_in_state(state, connector, conn_state, i) { 927 if (conn_state->best_encoder == encoder) 928 return connector; 929 } 930 931 return NULL; 932 } 933 EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder); 934 935 /** 936 * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder 937 * @state: Atomic state 938 * @encoder: The encoder to fetch the connector state for 939 * 940 * This function finds and returns the connector that will be connected to 941 * @encoder as specified by the @state. 942 * 943 * If there is no connector in @state which will have @encoder connected to it, 944 * this function will return NULL. While this may seem like an invalid use case, 945 * it is sometimes useful to differentiate commits which have no connectors 946 * attached to @encoder vs ones that do (and to inspect their state). This is 947 * especially true in disable hooks because the pipeline will change. 948 * 949 * Returns: The new connector connected to @encoder, or NULL if the encoder is 950 * not connected. 951 */ 952 struct drm_connector * 953 drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state, 954 struct drm_encoder *encoder) 955 { 956 struct drm_connector_state *conn_state; 957 struct drm_connector *connector; 958 unsigned int i; 959 960 for_each_new_connector_in_state(state, connector, conn_state, i) { 961 if (conn_state->best_encoder == encoder) 962 return connector; 963 } 964 965 return NULL; 966 } 967 EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder); 968 969 /** 970 * drm_atomic_get_connector_state - get connector state 971 * @state: global atomic state object 972 * @connector: connector to get state object for 973 * 974 * This function returns the connector state for the given connector, 975 * allocating it if needed. It will also grab the relevant connector lock to 976 * make sure that the state is consistent. 977 * 978 * Returns: 979 * 980 * Either the allocated state or the error code encoded into the pointer. When 981 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the 982 * entire atomic sequence must be restarted. All other errors are fatal. 983 */ 984 struct drm_connector_state * 985 drm_atomic_get_connector_state(struct drm_atomic_state *state, 986 struct drm_connector *connector) 987 { 988 int ret, index; 989 struct drm_mode_config *config = &connector->dev->mode_config; 990 struct drm_connector_state *connector_state; 991 992 WARN_ON(!state->acquire_ctx); 993 994 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); 995 if (ret) 996 return ERR_PTR(ret); 997 998 index = drm_connector_index(connector); 999 1000 if (index >= state->num_connector) { 1001 struct __drm_connnectors_state *c; 1002 int alloc = max(index + 1, config->num_connector); 1003 1004 c = krealloc_array(state->connectors, alloc, 1005 sizeof(*state->connectors), GFP_KERNEL); 1006 if (!c) 1007 return ERR_PTR(-ENOMEM); 1008 1009 state->connectors = c; 1010 memset(&state->connectors[state->num_connector], 0, 1011 sizeof(*state->connectors) * (alloc - state->num_connector)); 1012 1013 state->num_connector = alloc; 1014 } 1015 1016 if (state->connectors[index].state) 1017 return state->connectors[index].state; 1018 1019 connector_state = connector->funcs->atomic_duplicate_state(connector); 1020 if (!connector_state) 1021 return ERR_PTR(-ENOMEM); 1022 1023 drm_connector_get(connector); 1024 state->connectors[index].state = connector_state; 1025 state->connectors[index].old_state = connector->state; 1026 state->connectors[index].new_state = connector_state; 1027 state->connectors[index].ptr = connector; 1028 connector_state->state = state; 1029 1030 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n", 1031 connector->base.id, connector->name, 1032 connector_state, state); 1033 1034 if (connector_state->crtc) { 1035 struct drm_crtc_state *crtc_state; 1036 1037 crtc_state = drm_atomic_get_crtc_state(state, 1038 connector_state->crtc); 1039 if (IS_ERR(crtc_state)) 1040 return ERR_CAST(crtc_state); 1041 } 1042 1043 return connector_state; 1044 } 1045 EXPORT_SYMBOL(drm_atomic_get_connector_state); 1046 1047 static void drm_atomic_connector_print_state(struct drm_printer *p, 1048 const struct drm_connector_state *state) 1049 { 1050 struct drm_connector *connector = state->connector; 1051 1052 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name); 1053 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); 1054 drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware); 1055 1056 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) 1057 if (state->writeback_job && state->writeback_job->fb) 1058 drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id); 1059 1060 if (connector->funcs->atomic_print_state) 1061 connector->funcs->atomic_print_state(p, state); 1062 } 1063 1064 /** 1065 * drm_atomic_get_bridge_state - get bridge state 1066 * @state: global atomic state object 1067 * @bridge: bridge to get state object for 1068 * 1069 * This function returns the bridge state for the given bridge, allocating it 1070 * if needed. It will also grab the relevant bridge lock to make sure that the 1071 * state is consistent. 1072 * 1073 * Returns: 1074 * 1075 * Either the allocated state or the error code encoded into the pointer. When 1076 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the 1077 * entire atomic sequence must be restarted. 1078 */ 1079 struct drm_bridge_state * 1080 drm_atomic_get_bridge_state(struct drm_atomic_state *state, 1081 struct drm_bridge *bridge) 1082 { 1083 struct drm_private_state *obj_state; 1084 1085 obj_state = drm_atomic_get_private_obj_state(state, &bridge->base); 1086 if (IS_ERR(obj_state)) 1087 return ERR_CAST(obj_state); 1088 1089 return drm_priv_to_bridge_state(obj_state); 1090 } 1091 EXPORT_SYMBOL(drm_atomic_get_bridge_state); 1092 1093 /** 1094 * drm_atomic_get_old_bridge_state - get old bridge state, if it exists 1095 * @state: global atomic state object 1096 * @bridge: bridge to grab 1097 * 1098 * This function returns the old bridge state for the given bridge, or NULL if 1099 * the bridge is not part of the global atomic state. 1100 */ 1101 struct drm_bridge_state * 1102 drm_atomic_get_old_bridge_state(struct drm_atomic_state *state, 1103 struct drm_bridge *bridge) 1104 { 1105 struct drm_private_state *obj_state; 1106 1107 obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base); 1108 if (!obj_state) 1109 return NULL; 1110 1111 return drm_priv_to_bridge_state(obj_state); 1112 } 1113 EXPORT_SYMBOL(drm_atomic_get_old_bridge_state); 1114 1115 /** 1116 * drm_atomic_get_new_bridge_state - get new bridge state, if it exists 1117 * @state: global atomic state object 1118 * @bridge: bridge to grab 1119 * 1120 * This function returns the new bridge state for the given bridge, or NULL if 1121 * the bridge is not part of the global atomic state. 1122 */ 1123 struct drm_bridge_state * 1124 drm_atomic_get_new_bridge_state(struct drm_atomic_state *state, 1125 struct drm_bridge *bridge) 1126 { 1127 struct drm_private_state *obj_state; 1128 1129 obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base); 1130 if (!obj_state) 1131 return NULL; 1132 1133 return drm_priv_to_bridge_state(obj_state); 1134 } 1135 EXPORT_SYMBOL(drm_atomic_get_new_bridge_state); 1136 1137 /** 1138 * drm_atomic_add_encoder_bridges - add bridges attached to an encoder 1139 * @state: atomic state 1140 * @encoder: DRM encoder 1141 * 1142 * This function adds all bridges attached to @encoder. This is needed to add 1143 * bridge states to @state and make them available when 1144 * &drm_bridge_funcs.atomic_check(), &drm_bridge_funcs.atomic_pre_enable(), 1145 * &drm_bridge_funcs.atomic_enable(), 1146 * &drm_bridge_funcs.atomic_disable_post_disable() are called. 1147 * 1148 * Returns: 1149 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 1150 * then the w/w mutex code has detected a deadlock and the entire atomic 1151 * sequence must be restarted. All other errors are fatal. 1152 */ 1153 int 1154 drm_atomic_add_encoder_bridges(struct drm_atomic_state *state, 1155 struct drm_encoder *encoder) 1156 { 1157 struct drm_bridge_state *bridge_state; 1158 struct drm_bridge *bridge; 1159 1160 if (!encoder) 1161 return 0; 1162 1163 DRM_DEBUG_ATOMIC("Adding all bridges for [encoder:%d:%s] to %p\n", 1164 encoder->base.id, encoder->name, state); 1165 1166 drm_for_each_bridge_in_chain(encoder, bridge) { 1167 /* Skip bridges that don't implement the atomic state hooks. */ 1168 if (!bridge->funcs->atomic_duplicate_state) 1169 continue; 1170 1171 bridge_state = drm_atomic_get_bridge_state(state, bridge); 1172 if (IS_ERR(bridge_state)) 1173 return PTR_ERR(bridge_state); 1174 } 1175 1176 return 0; 1177 } 1178 EXPORT_SYMBOL(drm_atomic_add_encoder_bridges); 1179 1180 /** 1181 * drm_atomic_add_affected_connectors - add connectors for CRTC 1182 * @state: atomic state 1183 * @crtc: DRM CRTC 1184 * 1185 * This function walks the current configuration and adds all connectors 1186 * currently using @crtc to the atomic configuration @state. Note that this 1187 * function must acquire the connection mutex. This can potentially cause 1188 * unneeded serialization if the update is just for the planes on one CRTC. Hence 1189 * drivers and helpers should only call this when really needed (e.g. when a 1190 * full modeset needs to happen due to some change). 1191 * 1192 * Returns: 1193 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 1194 * then the w/w mutex code has detected a deadlock and the entire atomic 1195 * sequence must be restarted. All other errors are fatal. 1196 */ 1197 int 1198 drm_atomic_add_affected_connectors(struct drm_atomic_state *state, 1199 struct drm_crtc *crtc) 1200 { 1201 struct drm_mode_config *config = &state->dev->mode_config; 1202 struct drm_connector *connector; 1203 struct drm_connector_state *conn_state; 1204 struct drm_connector_list_iter conn_iter; 1205 struct drm_crtc_state *crtc_state; 1206 int ret; 1207 1208 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1209 if (IS_ERR(crtc_state)) 1210 return PTR_ERR(crtc_state); 1211 1212 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); 1213 if (ret) 1214 return ret; 1215 1216 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n", 1217 crtc->base.id, crtc->name, state); 1218 1219 /* 1220 * Changed connectors are already in @state, so only need to look 1221 * at the connector_mask in crtc_state. 1222 */ 1223 drm_connector_list_iter_begin(state->dev, &conn_iter); 1224 drm_for_each_connector_iter(connector, &conn_iter) { 1225 if (!(crtc_state->connector_mask & drm_connector_mask(connector))) 1226 continue; 1227 1228 conn_state = drm_atomic_get_connector_state(state, connector); 1229 if (IS_ERR(conn_state)) { 1230 drm_connector_list_iter_end(&conn_iter); 1231 return PTR_ERR(conn_state); 1232 } 1233 } 1234 drm_connector_list_iter_end(&conn_iter); 1235 1236 return 0; 1237 } 1238 EXPORT_SYMBOL(drm_atomic_add_affected_connectors); 1239 1240 /** 1241 * drm_atomic_add_affected_planes - add planes for CRTC 1242 * @state: atomic state 1243 * @crtc: DRM CRTC 1244 * 1245 * This function walks the current configuration and adds all planes 1246 * currently used by @crtc to the atomic configuration @state. This is useful 1247 * when an atomic commit also needs to check all currently enabled plane on 1248 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC 1249 * to avoid special code to force-enable all planes. 1250 * 1251 * Since acquiring a plane state will always also acquire the w/w mutex of the 1252 * current CRTC for that plane (if there is any) adding all the plane states for 1253 * a CRTC will not reduce parallelism of atomic updates. 1254 * 1255 * Returns: 1256 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 1257 * then the w/w mutex code has detected a deadlock and the entire atomic 1258 * sequence must be restarted. All other errors are fatal. 1259 */ 1260 int 1261 drm_atomic_add_affected_planes(struct drm_atomic_state *state, 1262 struct drm_crtc *crtc) 1263 { 1264 const struct drm_crtc_state *old_crtc_state = 1265 drm_atomic_get_old_crtc_state(state, crtc); 1266 struct drm_plane *plane; 1267 1268 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc)); 1269 1270 DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n", 1271 crtc->base.id, crtc->name, state); 1272 1273 drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) { 1274 struct drm_plane_state *plane_state = 1275 drm_atomic_get_plane_state(state, plane); 1276 1277 if (IS_ERR(plane_state)) 1278 return PTR_ERR(plane_state); 1279 } 1280 return 0; 1281 } 1282 EXPORT_SYMBOL(drm_atomic_add_affected_planes); 1283 1284 /** 1285 * drm_atomic_check_only - check whether a given config would work 1286 * @state: atomic configuration to check 1287 * 1288 * Note that this function can return -EDEADLK if the driver needed to acquire 1289 * more locks but encountered a deadlock. The caller must then do the usual w/w 1290 * backoff dance and restart. All other errors are fatal. 1291 * 1292 * Returns: 1293 * 0 on success, negative error code on failure. 1294 */ 1295 int drm_atomic_check_only(struct drm_atomic_state *state) 1296 { 1297 struct drm_device *dev = state->dev; 1298 struct drm_mode_config *config = &dev->mode_config; 1299 struct drm_plane *plane; 1300 struct drm_plane_state *old_plane_state; 1301 struct drm_plane_state *new_plane_state; 1302 struct drm_crtc *crtc; 1303 struct drm_crtc_state *old_crtc_state; 1304 struct drm_crtc_state *new_crtc_state; 1305 struct drm_connector *conn; 1306 struct drm_connector_state *conn_state; 1307 unsigned int requested_crtc = 0; 1308 unsigned int affected_crtc = 0; 1309 int i, ret = 0; 1310 1311 DRM_DEBUG_ATOMIC("checking %p\n", state); 1312 1313 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) 1314 requested_crtc |= drm_crtc_mask(crtc); 1315 1316 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { 1317 ret = drm_atomic_plane_check(old_plane_state, new_plane_state); 1318 if (ret) { 1319 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n", 1320 plane->base.id, plane->name); 1321 return ret; 1322 } 1323 } 1324 1325 for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { 1326 ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state); 1327 if (ret) { 1328 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n", 1329 crtc->base.id, crtc->name); 1330 return ret; 1331 } 1332 } 1333 1334 for_each_new_connector_in_state(state, conn, conn_state, i) { 1335 ret = drm_atomic_connector_check(conn, conn_state); 1336 if (ret) { 1337 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n", 1338 conn->base.id, conn->name); 1339 return ret; 1340 } 1341 } 1342 1343 if (config->funcs->atomic_check) { 1344 ret = config->funcs->atomic_check(state->dev, state); 1345 1346 if (ret) { 1347 DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n", 1348 state, ret); 1349 return ret; 1350 } 1351 } 1352 1353 if (!state->allow_modeset) { 1354 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { 1355 if (drm_atomic_crtc_needs_modeset(new_crtc_state)) { 1356 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n", 1357 crtc->base.id, crtc->name); 1358 return -EINVAL; 1359 } 1360 } 1361 } 1362 1363 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) 1364 affected_crtc |= drm_crtc_mask(crtc); 1365 1366 /* 1367 * For commits that allow modesets drivers can add other CRTCs to the 1368 * atomic commit, e.g. when they need to reallocate global resources. 1369 * This can cause spurious EBUSY, which robs compositors of a very 1370 * effective sanity check for their drawing loop. Therefor only allow 1371 * drivers to add unrelated CRTC states for modeset commits. 1372 * 1373 * FIXME: Should add affected_crtc mask to the ATOMIC IOCTL as an output 1374 * so compositors know what's going on. 1375 */ 1376 if (affected_crtc != requested_crtc) { 1377 DRM_DEBUG_ATOMIC("driver added CRTC to commit: requested 0x%x, affected 0x%0x\n", 1378 requested_crtc, affected_crtc); 1379 WARN(!state->allow_modeset, "adding CRTC not allowed without modesets: requested 0x%x, affected 0x%0x\n", 1380 requested_crtc, affected_crtc); 1381 } 1382 1383 return 0; 1384 } 1385 EXPORT_SYMBOL(drm_atomic_check_only); 1386 1387 /** 1388 * drm_atomic_commit - commit configuration atomically 1389 * @state: atomic configuration to check 1390 * 1391 * Note that this function can return -EDEADLK if the driver needed to acquire 1392 * more locks but encountered a deadlock. The caller must then do the usual w/w 1393 * backoff dance and restart. All other errors are fatal. 1394 * 1395 * This function will take its own reference on @state. 1396 * Callers should always release their reference with drm_atomic_state_put(). 1397 * 1398 * Returns: 1399 * 0 on success, negative error code on failure. 1400 */ 1401 int drm_atomic_commit(struct drm_atomic_state *state) 1402 { 1403 struct drm_mode_config *config = &state->dev->mode_config; 1404 int ret; 1405 1406 ret = drm_atomic_check_only(state); 1407 if (ret) 1408 return ret; 1409 1410 DRM_DEBUG_ATOMIC("committing %p\n", state); 1411 1412 return config->funcs->atomic_commit(state->dev, state, false); 1413 } 1414 EXPORT_SYMBOL(drm_atomic_commit); 1415 1416 /** 1417 * drm_atomic_nonblocking_commit - atomic nonblocking commit 1418 * @state: atomic configuration to check 1419 * 1420 * Note that this function can return -EDEADLK if the driver needed to acquire 1421 * more locks but encountered a deadlock. The caller must then do the usual w/w 1422 * backoff dance and restart. All other errors are fatal. 1423 * 1424 * This function will take its own reference on @state. 1425 * Callers should always release their reference with drm_atomic_state_put(). 1426 * 1427 * Returns: 1428 * 0 on success, negative error code on failure. 1429 */ 1430 int drm_atomic_nonblocking_commit(struct drm_atomic_state *state) 1431 { 1432 struct drm_mode_config *config = &state->dev->mode_config; 1433 int ret; 1434 1435 ret = drm_atomic_check_only(state); 1436 if (ret) 1437 return ret; 1438 1439 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state); 1440 1441 return config->funcs->atomic_commit(state->dev, state, true); 1442 } 1443 EXPORT_SYMBOL(drm_atomic_nonblocking_commit); 1444 1445 /* just used from drm-client and atomic-helper: */ 1446 int __drm_atomic_helper_disable_plane(struct drm_plane *plane, 1447 struct drm_plane_state *plane_state) 1448 { 1449 int ret; 1450 1451 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); 1452 if (ret != 0) 1453 return ret; 1454 1455 drm_atomic_set_fb_for_plane(plane_state, NULL); 1456 plane_state->crtc_x = 0; 1457 plane_state->crtc_y = 0; 1458 plane_state->crtc_w = 0; 1459 plane_state->crtc_h = 0; 1460 plane_state->src_x = 0; 1461 plane_state->src_y = 0; 1462 plane_state->src_w = 0; 1463 plane_state->src_h = 0; 1464 1465 return 0; 1466 } 1467 EXPORT_SYMBOL(__drm_atomic_helper_disable_plane); 1468 1469 static int update_output_state(struct drm_atomic_state *state, 1470 struct drm_mode_set *set) 1471 { 1472 struct drm_device *dev = set->crtc->dev; 1473 struct drm_crtc *crtc; 1474 struct drm_crtc_state *new_crtc_state; 1475 struct drm_connector *connector; 1476 struct drm_connector_state *new_conn_state; 1477 int ret, i; 1478 1479 ret = drm_modeset_lock(&dev->mode_config.connection_mutex, 1480 state->acquire_ctx); 1481 if (ret) 1482 return ret; 1483 1484 /* First disable all connectors on the target crtc. */ 1485 ret = drm_atomic_add_affected_connectors(state, set->crtc); 1486 if (ret) 1487 return ret; 1488 1489 for_each_new_connector_in_state(state, connector, new_conn_state, i) { 1490 if (new_conn_state->crtc == set->crtc) { 1491 ret = drm_atomic_set_crtc_for_connector(new_conn_state, 1492 NULL); 1493 if (ret) 1494 return ret; 1495 1496 /* Make sure legacy setCrtc always re-trains */ 1497 new_conn_state->link_status = DRM_LINK_STATUS_GOOD; 1498 } 1499 } 1500 1501 /* Then set all connectors from set->connectors on the target crtc */ 1502 for (i = 0; i < set->num_connectors; i++) { 1503 new_conn_state = drm_atomic_get_connector_state(state, 1504 set->connectors[i]); 1505 if (IS_ERR(new_conn_state)) 1506 return PTR_ERR(new_conn_state); 1507 1508 ret = drm_atomic_set_crtc_for_connector(new_conn_state, 1509 set->crtc); 1510 if (ret) 1511 return ret; 1512 } 1513 1514 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { 1515 /* 1516 * Don't update ->enable for the CRTC in the set_config request, 1517 * since a mismatch would indicate a bug in the upper layers. 1518 * The actual modeset code later on will catch any 1519 * inconsistencies here. 1520 */ 1521 if (crtc == set->crtc) 1522 continue; 1523 1524 if (!new_crtc_state->connector_mask) { 1525 ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state, 1526 NULL); 1527 if (ret < 0) 1528 return ret; 1529 1530 new_crtc_state->active = false; 1531 } 1532 } 1533 1534 return 0; 1535 } 1536 1537 /* just used from drm-client and atomic-helper: */ 1538 int __drm_atomic_helper_set_config(struct drm_mode_set *set, 1539 struct drm_atomic_state *state) 1540 { 1541 struct drm_crtc_state *crtc_state; 1542 struct drm_plane_state *primary_state; 1543 struct drm_crtc *crtc = set->crtc; 1544 int hdisplay, vdisplay; 1545 int ret; 1546 1547 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1548 if (IS_ERR(crtc_state)) 1549 return PTR_ERR(crtc_state); 1550 1551 primary_state = drm_atomic_get_plane_state(state, crtc->primary); 1552 if (IS_ERR(primary_state)) 1553 return PTR_ERR(primary_state); 1554 1555 if (!set->mode) { 1556 WARN_ON(set->fb); 1557 WARN_ON(set->num_connectors); 1558 1559 ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); 1560 if (ret != 0) 1561 return ret; 1562 1563 crtc_state->active = false; 1564 1565 ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); 1566 if (ret != 0) 1567 return ret; 1568 1569 drm_atomic_set_fb_for_plane(primary_state, NULL); 1570 1571 goto commit; 1572 } 1573 1574 WARN_ON(!set->fb); 1575 WARN_ON(!set->num_connectors); 1576 1577 ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); 1578 if (ret != 0) 1579 return ret; 1580 1581 crtc_state->active = true; 1582 1583 ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); 1584 if (ret != 0) 1585 return ret; 1586 1587 drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay); 1588 1589 drm_atomic_set_fb_for_plane(primary_state, set->fb); 1590 primary_state->crtc_x = 0; 1591 primary_state->crtc_y = 0; 1592 primary_state->crtc_w = hdisplay; 1593 primary_state->crtc_h = vdisplay; 1594 primary_state->src_x = set->x << 16; 1595 primary_state->src_y = set->y << 16; 1596 if (drm_rotation_90_or_270(primary_state->rotation)) { 1597 primary_state->src_w = vdisplay << 16; 1598 primary_state->src_h = hdisplay << 16; 1599 } else { 1600 primary_state->src_w = hdisplay << 16; 1601 primary_state->src_h = vdisplay << 16; 1602 } 1603 1604 commit: 1605 ret = update_output_state(state, set); 1606 if (ret) 1607 return ret; 1608 1609 return 0; 1610 } 1611 EXPORT_SYMBOL(__drm_atomic_helper_set_config); 1612 1613 /** 1614 * drm_atomic_print_new_state - prints drm atomic state 1615 * @state: atomic configuration to check 1616 * @p: drm printer 1617 * 1618 * This functions prints the drm atomic state snapshot using the drm printer 1619 * which is passed to it. This snapshot can be used for debugging purposes. 1620 * 1621 * Note that this function looks into the new state objects and hence its not 1622 * safe to be used after the call to drm_atomic_helper_commit_hw_done(). 1623 */ 1624 void drm_atomic_print_new_state(const struct drm_atomic_state *state, 1625 struct drm_printer *p) 1626 { 1627 struct drm_plane *plane; 1628 struct drm_plane_state *plane_state; 1629 struct drm_crtc *crtc; 1630 struct drm_crtc_state *crtc_state; 1631 struct drm_connector *connector; 1632 struct drm_connector_state *connector_state; 1633 int i; 1634 1635 if (!p) { 1636 DRM_ERROR("invalid drm printer\n"); 1637 return; 1638 } 1639 1640 DRM_DEBUG_ATOMIC("checking %p\n", state); 1641 1642 for_each_new_plane_in_state(state, plane, plane_state, i) 1643 drm_atomic_plane_print_state(p, plane_state); 1644 1645 for_each_new_crtc_in_state(state, crtc, crtc_state, i) 1646 drm_atomic_crtc_print_state(p, crtc_state); 1647 1648 for_each_new_connector_in_state(state, connector, connector_state, i) 1649 drm_atomic_connector_print_state(p, connector_state); 1650 } 1651 EXPORT_SYMBOL(drm_atomic_print_new_state); 1652 1653 static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p, 1654 bool take_locks) 1655 { 1656 struct drm_mode_config *config = &dev->mode_config; 1657 struct drm_plane *plane; 1658 struct drm_crtc *crtc; 1659 struct drm_connector *connector; 1660 struct drm_connector_list_iter conn_iter; 1661 1662 if (!drm_drv_uses_atomic_modeset(dev)) 1663 return; 1664 1665 list_for_each_entry(plane, &config->plane_list, head) { 1666 if (take_locks) 1667 drm_modeset_lock(&plane->mutex, NULL); 1668 drm_atomic_plane_print_state(p, plane->state); 1669 if (take_locks) 1670 drm_modeset_unlock(&plane->mutex); 1671 } 1672 1673 list_for_each_entry(crtc, &config->crtc_list, head) { 1674 if (take_locks) 1675 drm_modeset_lock(&crtc->mutex, NULL); 1676 drm_atomic_crtc_print_state(p, crtc->state); 1677 if (take_locks) 1678 drm_modeset_unlock(&crtc->mutex); 1679 } 1680 1681 drm_connector_list_iter_begin(dev, &conn_iter); 1682 if (take_locks) 1683 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 1684 drm_for_each_connector_iter(connector, &conn_iter) 1685 drm_atomic_connector_print_state(p, connector->state); 1686 if (take_locks) 1687 drm_modeset_unlock(&dev->mode_config.connection_mutex); 1688 drm_connector_list_iter_end(&conn_iter); 1689 } 1690 1691 /** 1692 * drm_state_dump - dump entire device atomic state 1693 * @dev: the drm device 1694 * @p: where to print the state to 1695 * 1696 * Just for debugging. Drivers might want an option to dump state 1697 * to dmesg in case of error irq's. (Hint, you probably want to 1698 * ratelimit this!) 1699 * 1700 * The caller must wrap this drm_modeset_lock_all_ctx() and 1701 * drm_modeset_drop_locks(). If this is called from error irq handler, it should 1702 * not be enabled by default - if you are debugging errors you might 1703 * not care that this is racey, but calling this without all modeset locks held 1704 * is inherently unsafe. 1705 */ 1706 void drm_state_dump(struct drm_device *dev, struct drm_printer *p) 1707 { 1708 __drm_state_dump(dev, p, false); 1709 } 1710 EXPORT_SYMBOL(drm_state_dump); 1711 1712 #ifdef CONFIG_DEBUG_FS 1713 static int drm_state_info(struct seq_file *m, void *data) 1714 { 1715 struct drm_info_node *node = (struct drm_info_node *) m->private; 1716 struct drm_device *dev = node->minor->dev; 1717 struct drm_printer p = drm_seq_file_printer(m); 1718 1719 __drm_state_dump(dev, &p, true); 1720 1721 return 0; 1722 } 1723 1724 /* any use in debugfs files to dump individual planes/crtc/etc? */ 1725 static const struct drm_info_list drm_atomic_debugfs_list[] = { 1726 {"state", drm_state_info, 0}, 1727 }; 1728 1729 void drm_atomic_debugfs_init(struct drm_minor *minor) 1730 { 1731 drm_debugfs_create_files(drm_atomic_debugfs_list, 1732 ARRAY_SIZE(drm_atomic_debugfs_list), 1733 minor->debugfs_root, minor); 1734 } 1735 #endif 1736