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 29 #include <drm/drmP.h> 30 #include <drm/drm_atomic.h> 31 #include <drm/drm_mode.h> 32 #include <drm/drm_print.h> 33 #include <drm/drm_writeback.h> 34 #include <linux/sync_file.h> 35 36 #include "drm_crtc_internal.h" 37 #include "drm_internal.h" 38 39 void __drm_crtc_commit_free(struct kref *kref) 40 { 41 struct drm_crtc_commit *commit = 42 container_of(kref, struct drm_crtc_commit, ref); 43 44 kfree(commit); 45 } 46 EXPORT_SYMBOL(__drm_crtc_commit_free); 47 48 /** 49 * drm_atomic_state_default_release - 50 * release memory initialized by drm_atomic_state_init 51 * @state: atomic state 52 * 53 * Free all the memory allocated by drm_atomic_state_init. 54 * This should only be used by drivers which are still subclassing 55 * &drm_atomic_state and haven't switched to &drm_private_state yet. 56 */ 57 void drm_atomic_state_default_release(struct drm_atomic_state *state) 58 { 59 kfree(state->connectors); 60 kfree(state->crtcs); 61 kfree(state->planes); 62 kfree(state->private_objs); 63 } 64 EXPORT_SYMBOL(drm_atomic_state_default_release); 65 66 /** 67 * drm_atomic_state_init - init new atomic state 68 * @dev: DRM device 69 * @state: atomic state 70 * 71 * Default implementation for filling in a new atomic state. 72 * This should only be used by drivers which are still subclassing 73 * &drm_atomic_state and haven't switched to &drm_private_state yet. 74 */ 75 int 76 drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state) 77 { 78 kref_init(&state->ref); 79 80 /* TODO legacy paths should maybe do a better job about 81 * setting this appropriately? 82 */ 83 state->allow_modeset = true; 84 85 state->crtcs = kcalloc(dev->mode_config.num_crtc, 86 sizeof(*state->crtcs), GFP_KERNEL); 87 if (!state->crtcs) 88 goto fail; 89 state->planes = kcalloc(dev->mode_config.num_total_plane, 90 sizeof(*state->planes), GFP_KERNEL); 91 if (!state->planes) 92 goto fail; 93 94 state->dev = dev; 95 96 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state); 97 98 return 0; 99 fail: 100 drm_atomic_state_default_release(state); 101 return -ENOMEM; 102 } 103 EXPORT_SYMBOL(drm_atomic_state_init); 104 105 /** 106 * drm_atomic_state_alloc - allocate atomic state 107 * @dev: DRM device 108 * 109 * This allocates an empty atomic state to track updates. 110 */ 111 struct drm_atomic_state * 112 drm_atomic_state_alloc(struct drm_device *dev) 113 { 114 struct drm_mode_config *config = &dev->mode_config; 115 116 if (!config->funcs->atomic_state_alloc) { 117 struct drm_atomic_state *state; 118 119 state = kzalloc(sizeof(*state), GFP_KERNEL); 120 if (!state) 121 return NULL; 122 if (drm_atomic_state_init(dev, state) < 0) { 123 kfree(state); 124 return NULL; 125 } 126 return state; 127 } 128 129 return config->funcs->atomic_state_alloc(dev); 130 } 131 EXPORT_SYMBOL(drm_atomic_state_alloc); 132 133 /** 134 * drm_atomic_state_default_clear - clear base atomic state 135 * @state: atomic state 136 * 137 * Default implementation for clearing atomic state. 138 * This should only be used by drivers which are still subclassing 139 * &drm_atomic_state and haven't switched to &drm_private_state yet. 140 */ 141 void drm_atomic_state_default_clear(struct drm_atomic_state *state) 142 { 143 struct drm_device *dev = state->dev; 144 struct drm_mode_config *config = &dev->mode_config; 145 int i; 146 147 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state); 148 149 for (i = 0; i < state->num_connector; i++) { 150 struct drm_connector *connector = state->connectors[i].ptr; 151 152 if (!connector) 153 continue; 154 155 connector->funcs->atomic_destroy_state(connector, 156 state->connectors[i].state); 157 state->connectors[i].ptr = NULL; 158 state->connectors[i].state = NULL; 159 state->connectors[i].old_state = NULL; 160 state->connectors[i].new_state = NULL; 161 drm_connector_put(connector); 162 } 163 164 for (i = 0; i < config->num_crtc; i++) { 165 struct drm_crtc *crtc = state->crtcs[i].ptr; 166 167 if (!crtc) 168 continue; 169 170 crtc->funcs->atomic_destroy_state(crtc, 171 state->crtcs[i].state); 172 173 state->crtcs[i].ptr = NULL; 174 state->crtcs[i].state = NULL; 175 state->crtcs[i].old_state = NULL; 176 state->crtcs[i].new_state = NULL; 177 } 178 179 for (i = 0; i < config->num_total_plane; i++) { 180 struct drm_plane *plane = state->planes[i].ptr; 181 182 if (!plane) 183 continue; 184 185 plane->funcs->atomic_destroy_state(plane, 186 state->planes[i].state); 187 state->planes[i].ptr = NULL; 188 state->planes[i].state = NULL; 189 state->planes[i].old_state = NULL; 190 state->planes[i].new_state = NULL; 191 } 192 193 for (i = 0; i < state->num_private_objs; i++) { 194 struct drm_private_obj *obj = state->private_objs[i].ptr; 195 196 obj->funcs->atomic_destroy_state(obj, 197 state->private_objs[i].state); 198 state->private_objs[i].ptr = NULL; 199 state->private_objs[i].state = NULL; 200 state->private_objs[i].old_state = NULL; 201 state->private_objs[i].new_state = NULL; 202 } 203 state->num_private_objs = 0; 204 205 if (state->fake_commit) { 206 drm_crtc_commit_put(state->fake_commit); 207 state->fake_commit = NULL; 208 } 209 } 210 EXPORT_SYMBOL(drm_atomic_state_default_clear); 211 212 /** 213 * drm_atomic_state_clear - clear state object 214 * @state: atomic state 215 * 216 * When the w/w mutex algorithm detects a deadlock we need to back off and drop 217 * all locks. So someone else could sneak in and change the current modeset 218 * configuration. Which means that all the state assembled in @state is no 219 * longer an atomic update to the current state, but to some arbitrary earlier 220 * state. Which could break assumptions the driver's 221 * &drm_mode_config_funcs.atomic_check likely relies on. 222 * 223 * Hence we must clear all cached state and completely start over, using this 224 * function. 225 */ 226 void drm_atomic_state_clear(struct drm_atomic_state *state) 227 { 228 struct drm_device *dev = state->dev; 229 struct drm_mode_config *config = &dev->mode_config; 230 231 if (config->funcs->atomic_state_clear) 232 config->funcs->atomic_state_clear(state); 233 else 234 drm_atomic_state_default_clear(state); 235 } 236 EXPORT_SYMBOL(drm_atomic_state_clear); 237 238 /** 239 * __drm_atomic_state_free - free all memory for an atomic state 240 * @ref: This atomic state to deallocate 241 * 242 * This frees all memory associated with an atomic state, including all the 243 * per-object state for planes, crtcs and connectors. 244 */ 245 void __drm_atomic_state_free(struct kref *ref) 246 { 247 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref); 248 struct drm_mode_config *config = &state->dev->mode_config; 249 250 drm_atomic_state_clear(state); 251 252 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state); 253 254 if (config->funcs->atomic_state_free) { 255 config->funcs->atomic_state_free(state); 256 } else { 257 drm_atomic_state_default_release(state); 258 kfree(state); 259 } 260 } 261 EXPORT_SYMBOL(__drm_atomic_state_free); 262 263 /** 264 * drm_atomic_get_crtc_state - get crtc state 265 * @state: global atomic state object 266 * @crtc: crtc to get state object for 267 * 268 * This function returns the crtc state for the given crtc, allocating it if 269 * needed. It will also grab the relevant crtc lock to make sure that the state 270 * is consistent. 271 * 272 * Returns: 273 * 274 * Either the allocated state or the error code encoded into the pointer. When 275 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the 276 * entire atomic sequence must be restarted. All other errors are fatal. 277 */ 278 struct drm_crtc_state * 279 drm_atomic_get_crtc_state(struct drm_atomic_state *state, 280 struct drm_crtc *crtc) 281 { 282 int ret, index = drm_crtc_index(crtc); 283 struct drm_crtc_state *crtc_state; 284 285 WARN_ON(!state->acquire_ctx); 286 287 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); 288 if (crtc_state) 289 return crtc_state; 290 291 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx); 292 if (ret) 293 return ERR_PTR(ret); 294 295 crtc_state = crtc->funcs->atomic_duplicate_state(crtc); 296 if (!crtc_state) 297 return ERR_PTR(-ENOMEM); 298 299 state->crtcs[index].state = crtc_state; 300 state->crtcs[index].old_state = crtc->state; 301 state->crtcs[index].new_state = crtc_state; 302 state->crtcs[index].ptr = crtc; 303 crtc_state->state = state; 304 305 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n", 306 crtc->base.id, crtc->name, crtc_state, state); 307 308 return crtc_state; 309 } 310 EXPORT_SYMBOL(drm_atomic_get_crtc_state); 311 312 static void set_out_fence_for_crtc(struct drm_atomic_state *state, 313 struct drm_crtc *crtc, s32 __user *fence_ptr) 314 { 315 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; 316 } 317 318 static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state, 319 struct drm_crtc *crtc) 320 { 321 s32 __user *fence_ptr; 322 323 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; 324 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; 325 326 return fence_ptr; 327 } 328 329 static int set_out_fence_for_connector(struct drm_atomic_state *state, 330 struct drm_connector *connector, 331 s32 __user *fence_ptr) 332 { 333 unsigned int index = drm_connector_index(connector); 334 335 if (!fence_ptr) 336 return 0; 337 338 if (put_user(-1, fence_ptr)) 339 return -EFAULT; 340 341 state->connectors[index].out_fence_ptr = fence_ptr; 342 343 return 0; 344 } 345 346 static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state, 347 struct drm_connector *connector) 348 { 349 unsigned int index = drm_connector_index(connector); 350 s32 __user *fence_ptr; 351 352 fence_ptr = state->connectors[index].out_fence_ptr; 353 state->connectors[index].out_fence_ptr = NULL; 354 355 return fence_ptr; 356 } 357 358 /** 359 * drm_atomic_set_mode_for_crtc - set mode for CRTC 360 * @state: the CRTC whose incoming state to update 361 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable 362 * 363 * Set a mode (originating from the kernel) on the desired CRTC state and update 364 * the enable property. 365 * 366 * RETURNS: 367 * Zero on success, error code on failure. Cannot return -EDEADLK. 368 */ 369 int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state, 370 const struct drm_display_mode *mode) 371 { 372 struct drm_crtc *crtc = state->crtc; 373 struct drm_mode_modeinfo umode; 374 375 /* Early return for no change. */ 376 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0) 377 return 0; 378 379 drm_property_blob_put(state->mode_blob); 380 state->mode_blob = NULL; 381 382 if (mode) { 383 drm_mode_convert_to_umode(&umode, mode); 384 state->mode_blob = 385 drm_property_create_blob(state->crtc->dev, 386 sizeof(umode), 387 &umode); 388 if (IS_ERR(state->mode_blob)) 389 return PTR_ERR(state->mode_blob); 390 391 drm_mode_copy(&state->mode, mode); 392 state->enable = true; 393 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 394 mode->name, crtc->base.id, crtc->name, state); 395 } else { 396 memset(&state->mode, 0, sizeof(state->mode)); 397 state->enable = false; 398 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n", 399 crtc->base.id, crtc->name, state); 400 } 401 402 return 0; 403 } 404 EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc); 405 406 /** 407 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC 408 * @state: the CRTC whose incoming state to update 409 * @blob: pointer to blob property to use for mode 410 * 411 * Set a mode (originating from a blob property) on the desired CRTC state. 412 * This function will take a reference on the blob property for the CRTC state, 413 * and release the reference held on the state's existing mode property, if any 414 * was set. 415 * 416 * RETURNS: 417 * Zero on success, error code on failure. Cannot return -EDEADLK. 418 */ 419 int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, 420 struct drm_property_blob *blob) 421 { 422 struct drm_crtc *crtc = state->crtc; 423 424 if (blob == state->mode_blob) 425 return 0; 426 427 drm_property_blob_put(state->mode_blob); 428 state->mode_blob = NULL; 429 430 memset(&state->mode, 0, sizeof(state->mode)); 431 432 if (blob) { 433 int ret; 434 435 if (blob->length != sizeof(struct drm_mode_modeinfo)) { 436 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] bad mode blob length: %zu\n", 437 crtc->base.id, crtc->name, 438 blob->length); 439 return -EINVAL; 440 } 441 442 ret = drm_mode_convert_umode(crtc->dev, 443 &state->mode, blob->data); 444 if (ret) { 445 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n", 446 crtc->base.id, crtc->name, 447 ret, drm_get_mode_status_name(state->mode.status)); 448 drm_mode_debug_printmodeline(&state->mode); 449 return -EINVAL; 450 } 451 452 state->mode_blob = drm_property_blob_get(blob); 453 state->enable = true; 454 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 455 state->mode.name, crtc->base.id, crtc->name, 456 state); 457 } else { 458 state->enable = false; 459 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n", 460 crtc->base.id, crtc->name, state); 461 } 462 463 return 0; 464 } 465 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); 466 467 /** 468 * drm_atomic_replace_property_blob_from_id - lookup the new blob and replace the old one with it 469 * @dev: DRM device 470 * @blob: a pointer to the member blob to be replaced 471 * @blob_id: ID of the new blob 472 * @expected_size: total expected size of the blob data (in bytes) 473 * @expected_elem_size: expected element size of the blob data (in bytes) 474 * @replaced: did the blob get replaced? 475 * 476 * Replace @blob with another blob with the ID @blob_id. If @blob_id is zero 477 * @blob becomes NULL. 478 * 479 * If @expected_size is positive the new blob length is expected to be equal 480 * to @expected_size bytes. If @expected_elem_size is positive the new blob 481 * length is expected to be a multiple of @expected_elem_size bytes. Otherwise 482 * an error is returned. 483 * 484 * @replaced will indicate to the caller whether the blob was replaced or not. 485 * If the old and new blobs were in fact the same blob @replaced will be false 486 * otherwise it will be true. 487 * 488 * RETURNS: 489 * Zero on success, error code on failure. 490 */ 491 static int 492 drm_atomic_replace_property_blob_from_id(struct drm_device *dev, 493 struct drm_property_blob **blob, 494 uint64_t blob_id, 495 ssize_t expected_size, 496 ssize_t expected_elem_size, 497 bool *replaced) 498 { 499 struct drm_property_blob *new_blob = NULL; 500 501 if (blob_id != 0) { 502 new_blob = drm_property_lookup_blob(dev, blob_id); 503 if (new_blob == NULL) 504 return -EINVAL; 505 506 if (expected_size > 0 && 507 new_blob->length != expected_size) { 508 drm_property_blob_put(new_blob); 509 return -EINVAL; 510 } 511 if (expected_elem_size > 0 && 512 new_blob->length % expected_elem_size != 0) { 513 drm_property_blob_put(new_blob); 514 return -EINVAL; 515 } 516 } 517 518 *replaced |= drm_property_replace_blob(blob, new_blob); 519 drm_property_blob_put(new_blob); 520 521 return 0; 522 } 523 524 /** 525 * drm_atomic_crtc_set_property - set property on CRTC 526 * @crtc: the drm CRTC to set a property on 527 * @state: the state object to update with the new property value 528 * @property: the property to set 529 * @val: the new property value 530 * 531 * This function handles generic/core properties and calls out to driver's 532 * &drm_crtc_funcs.atomic_set_property for driver properties. To ensure 533 * consistent behavior you must call this function rather than the driver hook 534 * directly. 535 * 536 * RETURNS: 537 * Zero on success, error code on failure 538 */ 539 int drm_atomic_crtc_set_property(struct drm_crtc *crtc, 540 struct drm_crtc_state *state, struct drm_property *property, 541 uint64_t val) 542 { 543 struct drm_device *dev = crtc->dev; 544 struct drm_mode_config *config = &dev->mode_config; 545 bool replaced = false; 546 int ret; 547 548 if (property == config->prop_active) 549 state->active = val; 550 else if (property == config->prop_mode_id) { 551 struct drm_property_blob *mode = 552 drm_property_lookup_blob(dev, val); 553 ret = drm_atomic_set_mode_prop_for_crtc(state, mode); 554 drm_property_blob_put(mode); 555 return ret; 556 } else if (property == config->degamma_lut_property) { 557 ret = drm_atomic_replace_property_blob_from_id(dev, 558 &state->degamma_lut, 559 val, 560 -1, sizeof(struct drm_color_lut), 561 &replaced); 562 state->color_mgmt_changed |= replaced; 563 return ret; 564 } else if (property == config->ctm_property) { 565 ret = drm_atomic_replace_property_blob_from_id(dev, 566 &state->ctm, 567 val, 568 sizeof(struct drm_color_ctm), -1, 569 &replaced); 570 state->color_mgmt_changed |= replaced; 571 return ret; 572 } else if (property == config->gamma_lut_property) { 573 ret = drm_atomic_replace_property_blob_from_id(dev, 574 &state->gamma_lut, 575 val, 576 -1, sizeof(struct drm_color_lut), 577 &replaced); 578 state->color_mgmt_changed |= replaced; 579 return ret; 580 } else if (property == config->prop_out_fence_ptr) { 581 s32 __user *fence_ptr = u64_to_user_ptr(val); 582 583 if (!fence_ptr) 584 return 0; 585 586 if (put_user(-1, fence_ptr)) 587 return -EFAULT; 588 589 set_out_fence_for_crtc(state->state, crtc, fence_ptr); 590 } else if (crtc->funcs->atomic_set_property) { 591 return crtc->funcs->atomic_set_property(crtc, state, property, val); 592 } else { 593 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n", 594 crtc->base.id, crtc->name, 595 property->base.id, property->name); 596 return -EINVAL; 597 } 598 599 return 0; 600 } 601 EXPORT_SYMBOL(drm_atomic_crtc_set_property); 602 603 /** 604 * drm_atomic_crtc_get_property - get property value from CRTC state 605 * @crtc: the drm CRTC to set a property on 606 * @state: the state object to get the property value from 607 * @property: the property to set 608 * @val: return location for the property value 609 * 610 * This function handles generic/core properties and calls out to driver's 611 * &drm_crtc_funcs.atomic_get_property for driver properties. To ensure 612 * consistent behavior you must call this function rather than the driver hook 613 * directly. 614 * 615 * RETURNS: 616 * Zero on success, error code on failure 617 */ 618 static int 619 drm_atomic_crtc_get_property(struct drm_crtc *crtc, 620 const struct drm_crtc_state *state, 621 struct drm_property *property, uint64_t *val) 622 { 623 struct drm_device *dev = crtc->dev; 624 struct drm_mode_config *config = &dev->mode_config; 625 626 if (property == config->prop_active) 627 *val = state->active; 628 else if (property == config->prop_mode_id) 629 *val = (state->mode_blob) ? state->mode_blob->base.id : 0; 630 else if (property == config->degamma_lut_property) 631 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; 632 else if (property == config->ctm_property) 633 *val = (state->ctm) ? state->ctm->base.id : 0; 634 else if (property == config->gamma_lut_property) 635 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; 636 else if (property == config->prop_out_fence_ptr) 637 *val = 0; 638 else if (crtc->funcs->atomic_get_property) 639 return crtc->funcs->atomic_get_property(crtc, state, property, val); 640 else 641 return -EINVAL; 642 643 return 0; 644 } 645 646 /** 647 * drm_atomic_crtc_check - check crtc state 648 * @crtc: crtc to check 649 * @state: crtc state to check 650 * 651 * Provides core sanity checks for crtc state. 652 * 653 * RETURNS: 654 * Zero on success, error code on failure 655 */ 656 static int drm_atomic_crtc_check(struct drm_crtc *crtc, 657 struct drm_crtc_state *state) 658 { 659 /* NOTE: we explicitly don't enforce constraints such as primary 660 * layer covering entire screen, since that is something we want 661 * to allow (on hw that supports it). For hw that does not, it 662 * should be checked in driver's crtc->atomic_check() vfunc. 663 * 664 * TODO: Add generic modeset state checks once we support those. 665 */ 666 667 if (state->active && !state->enable) { 668 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n", 669 crtc->base.id, crtc->name); 670 return -EINVAL; 671 } 672 673 /* The state->enable vs. state->mode_blob checks can be WARN_ON, 674 * as this is a kernel-internal detail that userspace should never 675 * be able to trigger. */ 676 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && 677 WARN_ON(state->enable && !state->mode_blob)) { 678 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n", 679 crtc->base.id, crtc->name); 680 return -EINVAL; 681 } 682 683 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && 684 WARN_ON(!state->enable && state->mode_blob)) { 685 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n", 686 crtc->base.id, crtc->name); 687 return -EINVAL; 688 } 689 690 /* 691 * Reject event generation for when a CRTC is off and stays off. 692 * It wouldn't be hard to implement this, but userspace has a track 693 * record of happily burning through 100% cpu (or worse, crash) when the 694 * display pipe is suspended. To avoid all that fun just reject updates 695 * that ask for events since likely that indicates a bug in the 696 * compositor's drawing loop. This is consistent with the vblank IOCTL 697 * and legacy page_flip IOCTL which also reject service on a disabled 698 * pipe. 699 */ 700 if (state->event && !state->active && !crtc->state->active) { 701 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n", 702 crtc->base.id, crtc->name); 703 return -EINVAL; 704 } 705 706 return 0; 707 } 708 709 static void drm_atomic_crtc_print_state(struct drm_printer *p, 710 const struct drm_crtc_state *state) 711 { 712 struct drm_crtc *crtc = state->crtc; 713 714 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name); 715 drm_printf(p, "\tenable=%d\n", state->enable); 716 drm_printf(p, "\tactive=%d\n", state->active); 717 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed); 718 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed); 719 drm_printf(p, "\tactive_changed=%d\n", state->active_changed); 720 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed); 721 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed); 722 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask); 723 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask); 724 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask); 725 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode)); 726 727 if (crtc->funcs->atomic_print_state) 728 crtc->funcs->atomic_print_state(p, state); 729 } 730 731 /** 732 * drm_atomic_connector_check - check connector state 733 * @connector: connector to check 734 * @state: connector state to check 735 * 736 * Provides core sanity checks for connector state. 737 * 738 * RETURNS: 739 * Zero on success, error code on failure 740 */ 741 static int drm_atomic_connector_check(struct drm_connector *connector, 742 struct drm_connector_state *state) 743 { 744 struct drm_crtc_state *crtc_state; 745 struct drm_writeback_job *writeback_job = state->writeback_job; 746 747 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job) 748 return 0; 749 750 if (writeback_job->fb && !state->crtc) { 751 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n", 752 connector->base.id, connector->name); 753 return -EINVAL; 754 } 755 756 if (state->crtc) 757 crtc_state = drm_atomic_get_existing_crtc_state(state->state, 758 state->crtc); 759 760 if (writeback_job->fb && !crtc_state->active) { 761 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n", 762 connector->base.id, connector->name, 763 state->crtc->base.id); 764 return -EINVAL; 765 } 766 767 if (writeback_job->out_fence && !writeback_job->fb) { 768 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n", 769 connector->base.id, connector->name); 770 return -EINVAL; 771 } 772 773 return 0; 774 } 775 776 /** 777 * drm_atomic_get_plane_state - get plane state 778 * @state: global atomic state object 779 * @plane: plane to get state object for 780 * 781 * This function returns the plane state for the given plane, allocating it if 782 * needed. It will also grab the relevant plane lock to make sure that the state 783 * is consistent. 784 * 785 * Returns: 786 * 787 * Either the allocated state or the error code encoded into the pointer. When 788 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the 789 * entire atomic sequence must be restarted. All other errors are fatal. 790 */ 791 struct drm_plane_state * 792 drm_atomic_get_plane_state(struct drm_atomic_state *state, 793 struct drm_plane *plane) 794 { 795 int ret, index = drm_plane_index(plane); 796 struct drm_plane_state *plane_state; 797 798 WARN_ON(!state->acquire_ctx); 799 800 /* the legacy pointers should never be set */ 801 WARN_ON(plane->fb); 802 WARN_ON(plane->old_fb); 803 WARN_ON(plane->crtc); 804 805 plane_state = drm_atomic_get_existing_plane_state(state, plane); 806 if (plane_state) 807 return plane_state; 808 809 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx); 810 if (ret) 811 return ERR_PTR(ret); 812 813 plane_state = plane->funcs->atomic_duplicate_state(plane); 814 if (!plane_state) 815 return ERR_PTR(-ENOMEM); 816 817 state->planes[index].state = plane_state; 818 state->planes[index].ptr = plane; 819 state->planes[index].old_state = plane->state; 820 state->planes[index].new_state = plane_state; 821 plane_state->state = state; 822 823 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n", 824 plane->base.id, plane->name, plane_state, state); 825 826 if (plane_state->crtc) { 827 struct drm_crtc_state *crtc_state; 828 829 crtc_state = drm_atomic_get_crtc_state(state, 830 plane_state->crtc); 831 if (IS_ERR(crtc_state)) 832 return ERR_CAST(crtc_state); 833 } 834 835 return plane_state; 836 } 837 EXPORT_SYMBOL(drm_atomic_get_plane_state); 838 839 /** 840 * drm_atomic_plane_set_property - set property on plane 841 * @plane: the drm plane to set a property on 842 * @state: the state object to update with the new property value 843 * @property: the property to set 844 * @val: the new property value 845 * 846 * This function handles generic/core properties and calls out to driver's 847 * &drm_plane_funcs.atomic_set_property for driver properties. To ensure 848 * consistent behavior you must call this function rather than the driver hook 849 * directly. 850 * 851 * RETURNS: 852 * Zero on success, error code on failure 853 */ 854 static int drm_atomic_plane_set_property(struct drm_plane *plane, 855 struct drm_plane_state *state, struct drm_property *property, 856 uint64_t val) 857 { 858 struct drm_device *dev = plane->dev; 859 struct drm_mode_config *config = &dev->mode_config; 860 861 if (property == config->prop_fb_id) { 862 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val); 863 drm_atomic_set_fb_for_plane(state, fb); 864 if (fb) 865 drm_framebuffer_put(fb); 866 } else if (property == config->prop_in_fence_fd) { 867 if (state->fence) 868 return -EINVAL; 869 870 if (U642I64(val) == -1) 871 return 0; 872 873 state->fence = sync_file_get_fence(val); 874 if (!state->fence) 875 return -EINVAL; 876 877 } else if (property == config->prop_crtc_id) { 878 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val); 879 return drm_atomic_set_crtc_for_plane(state, crtc); 880 } else if (property == config->prop_crtc_x) { 881 state->crtc_x = U642I64(val); 882 } else if (property == config->prop_crtc_y) { 883 state->crtc_y = U642I64(val); 884 } else if (property == config->prop_crtc_w) { 885 state->crtc_w = val; 886 } else if (property == config->prop_crtc_h) { 887 state->crtc_h = val; 888 } else if (property == config->prop_src_x) { 889 state->src_x = val; 890 } else if (property == config->prop_src_y) { 891 state->src_y = val; 892 } else if (property == config->prop_src_w) { 893 state->src_w = val; 894 } else if (property == config->prop_src_h) { 895 state->src_h = val; 896 } else if (property == plane->alpha_property) { 897 state->alpha = val; 898 } else if (property == plane->rotation_property) { 899 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) { 900 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n", 901 plane->base.id, plane->name, val); 902 return -EINVAL; 903 } 904 state->rotation = val; 905 } else if (property == plane->zpos_property) { 906 state->zpos = val; 907 } else if (property == plane->color_encoding_property) { 908 state->color_encoding = val; 909 } else if (property == plane->color_range_property) { 910 state->color_range = val; 911 } else if (plane->funcs->atomic_set_property) { 912 return plane->funcs->atomic_set_property(plane, state, 913 property, val); 914 } else { 915 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n", 916 plane->base.id, plane->name, 917 property->base.id, property->name); 918 return -EINVAL; 919 } 920 921 return 0; 922 } 923 924 /** 925 * drm_atomic_plane_get_property - get property value from plane state 926 * @plane: the drm plane to set a property on 927 * @state: the state object to get the property value from 928 * @property: the property to set 929 * @val: return location for the property value 930 * 931 * This function handles generic/core properties and calls out to driver's 932 * &drm_plane_funcs.atomic_get_property for driver properties. To ensure 933 * consistent behavior you must call this function rather than the driver hook 934 * directly. 935 * 936 * RETURNS: 937 * Zero on success, error code on failure 938 */ 939 static int 940 drm_atomic_plane_get_property(struct drm_plane *plane, 941 const struct drm_plane_state *state, 942 struct drm_property *property, uint64_t *val) 943 { 944 struct drm_device *dev = plane->dev; 945 struct drm_mode_config *config = &dev->mode_config; 946 947 if (property == config->prop_fb_id) { 948 *val = (state->fb) ? state->fb->base.id : 0; 949 } else if (property == config->prop_in_fence_fd) { 950 *val = -1; 951 } else if (property == config->prop_crtc_id) { 952 *val = (state->crtc) ? state->crtc->base.id : 0; 953 } else if (property == config->prop_crtc_x) { 954 *val = I642U64(state->crtc_x); 955 } else if (property == config->prop_crtc_y) { 956 *val = I642U64(state->crtc_y); 957 } else if (property == config->prop_crtc_w) { 958 *val = state->crtc_w; 959 } else if (property == config->prop_crtc_h) { 960 *val = state->crtc_h; 961 } else if (property == config->prop_src_x) { 962 *val = state->src_x; 963 } else if (property == config->prop_src_y) { 964 *val = state->src_y; 965 } else if (property == config->prop_src_w) { 966 *val = state->src_w; 967 } else if (property == config->prop_src_h) { 968 *val = state->src_h; 969 } else if (property == plane->alpha_property) { 970 *val = state->alpha; 971 } else if (property == plane->rotation_property) { 972 *val = state->rotation; 973 } else if (property == plane->zpos_property) { 974 *val = state->zpos; 975 } else if (property == plane->color_encoding_property) { 976 *val = state->color_encoding; 977 } else if (property == plane->color_range_property) { 978 *val = state->color_range; 979 } else if (plane->funcs->atomic_get_property) { 980 return plane->funcs->atomic_get_property(plane, state, property, val); 981 } else { 982 return -EINVAL; 983 } 984 985 return 0; 986 } 987 988 static bool 989 plane_switching_crtc(struct drm_atomic_state *state, 990 struct drm_plane *plane, 991 struct drm_plane_state *plane_state) 992 { 993 if (!plane->state->crtc || !plane_state->crtc) 994 return false; 995 996 if (plane->state->crtc == plane_state->crtc) 997 return false; 998 999 /* This could be refined, but currently there's no helper or driver code 1000 * to implement direct switching of active planes nor userspace to take 1001 * advantage of more direct plane switching without the intermediate 1002 * full OFF state. 1003 */ 1004 return true; 1005 } 1006 1007 /** 1008 * drm_atomic_plane_check - check plane state 1009 * @plane: plane to check 1010 * @state: plane state to check 1011 * 1012 * Provides core sanity checks for plane state. 1013 * 1014 * RETURNS: 1015 * Zero on success, error code on failure 1016 */ 1017 static int drm_atomic_plane_check(struct drm_plane *plane, 1018 struct drm_plane_state *state) 1019 { 1020 unsigned int fb_width, fb_height; 1021 int ret; 1022 1023 /* either *both* CRTC and FB must be set, or neither */ 1024 if (state->crtc && !state->fb) { 1025 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n", 1026 plane->base.id, plane->name); 1027 return -EINVAL; 1028 } else if (state->fb && !state->crtc) { 1029 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n", 1030 plane->base.id, plane->name); 1031 return -EINVAL; 1032 } 1033 1034 /* if disabled, we don't care about the rest of the state: */ 1035 if (!state->crtc) 1036 return 0; 1037 1038 /* Check whether this plane is usable on this CRTC */ 1039 if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) { 1040 DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n", 1041 state->crtc->base.id, state->crtc->name, 1042 plane->base.id, plane->name); 1043 return -EINVAL; 1044 } 1045 1046 /* Check whether this plane supports the fb pixel format. */ 1047 ret = drm_plane_check_pixel_format(plane, state->fb->format->format, 1048 state->fb->modifier); 1049 if (ret) { 1050 struct drm_format_name_buf format_name; 1051 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %s, modifier 0x%llx\n", 1052 plane->base.id, plane->name, 1053 drm_get_format_name(state->fb->format->format, 1054 &format_name), 1055 state->fb->modifier); 1056 return ret; 1057 } 1058 1059 /* Give drivers some help against integer overflows */ 1060 if (state->crtc_w > INT_MAX || 1061 state->crtc_x > INT_MAX - (int32_t) state->crtc_w || 1062 state->crtc_h > INT_MAX || 1063 state->crtc_y > INT_MAX - (int32_t) state->crtc_h) { 1064 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n", 1065 plane->base.id, plane->name, 1066 state->crtc_w, state->crtc_h, 1067 state->crtc_x, state->crtc_y); 1068 return -ERANGE; 1069 } 1070 1071 fb_width = state->fb->width << 16; 1072 fb_height = state->fb->height << 16; 1073 1074 /* Make sure source coordinates are inside the fb. */ 1075 if (state->src_w > fb_width || 1076 state->src_x > fb_width - state->src_w || 1077 state->src_h > fb_height || 1078 state->src_y > fb_height - state->src_h) { 1079 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates " 1080 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n", 1081 plane->base.id, plane->name, 1082 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10, 1083 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10, 1084 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10, 1085 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10, 1086 state->fb->width, state->fb->height); 1087 return -ENOSPC; 1088 } 1089 1090 if (plane_switching_crtc(state->state, plane, state)) { 1091 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n", 1092 plane->base.id, plane->name); 1093 return -EINVAL; 1094 } 1095 1096 return 0; 1097 } 1098 1099 static void drm_atomic_plane_print_state(struct drm_printer *p, 1100 const struct drm_plane_state *state) 1101 { 1102 struct drm_plane *plane = state->plane; 1103 struct drm_rect src = drm_plane_state_src(state); 1104 struct drm_rect dest = drm_plane_state_dest(state); 1105 1106 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name); 1107 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); 1108 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0); 1109 if (state->fb) 1110 drm_framebuffer_print_info(p, 2, state->fb); 1111 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest)); 1112 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src)); 1113 drm_printf(p, "\trotation=%x\n", state->rotation); 1114 drm_printf(p, "\tcolor-encoding=%s\n", 1115 drm_get_color_encoding_name(state->color_encoding)); 1116 drm_printf(p, "\tcolor-range=%s\n", 1117 drm_get_color_range_name(state->color_range)); 1118 1119 if (plane->funcs->atomic_print_state) 1120 plane->funcs->atomic_print_state(p, state); 1121 } 1122 1123 /** 1124 * DOC: handling driver private state 1125 * 1126 * Very often the DRM objects exposed to userspace in the atomic modeset api 1127 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the 1128 * underlying hardware. Especially for any kind of shared resources (e.g. shared 1129 * clocks, scaler units, bandwidth and fifo limits shared among a group of 1130 * planes or CRTCs, and so on) it makes sense to model these as independent 1131 * objects. Drivers then need to do similar state tracking and commit ordering for 1132 * such private (since not exposed to userpace) objects as the atomic core and 1133 * helpers already provide for connectors, planes and CRTCs. 1134 * 1135 * To make this easier on drivers the atomic core provides some support to track 1136 * driver private state objects using struct &drm_private_obj, with the 1137 * associated state struct &drm_private_state. 1138 * 1139 * Similar to userspace-exposed objects, private state structures can be 1140 * acquired by calling drm_atomic_get_private_obj_state(). Since this function 1141 * does not take care of locking, drivers should wrap it for each type of 1142 * private state object they have with the required call to drm_modeset_lock() 1143 * for the corresponding &drm_modeset_lock. 1144 * 1145 * All private state structures contained in a &drm_atomic_state update can be 1146 * iterated using for_each_oldnew_private_obj_in_state(), 1147 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state(). 1148 * Drivers are recommended to wrap these for each type of driver private state 1149 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at 1150 * least if they want to iterate over all objects of a given type. 1151 * 1152 * An earlier way to handle driver private state was by subclassing struct 1153 * &drm_atomic_state. But since that encourages non-standard ways to implement 1154 * the check/commit split atomic requires (by using e.g. "check and rollback or 1155 * commit instead" of "duplicate state, check, then either commit or release 1156 * duplicated state) it is deprecated in favour of using &drm_private_state. 1157 */ 1158 1159 /** 1160 * drm_atomic_private_obj_init - initialize private object 1161 * @obj: private object 1162 * @state: initial private object state 1163 * @funcs: pointer to the struct of function pointers that identify the object 1164 * type 1165 * 1166 * Initialize the private object, which can be embedded into any 1167 * driver private object that needs its own atomic state. 1168 */ 1169 void 1170 drm_atomic_private_obj_init(struct drm_private_obj *obj, 1171 struct drm_private_state *state, 1172 const struct drm_private_state_funcs *funcs) 1173 { 1174 memset(obj, 0, sizeof(*obj)); 1175 1176 obj->state = state; 1177 obj->funcs = funcs; 1178 } 1179 EXPORT_SYMBOL(drm_atomic_private_obj_init); 1180 1181 /** 1182 * drm_atomic_private_obj_fini - finalize private object 1183 * @obj: private object 1184 * 1185 * Finalize the private object. 1186 */ 1187 void 1188 drm_atomic_private_obj_fini(struct drm_private_obj *obj) 1189 { 1190 obj->funcs->atomic_destroy_state(obj, obj->state); 1191 } 1192 EXPORT_SYMBOL(drm_atomic_private_obj_fini); 1193 1194 /** 1195 * drm_atomic_get_private_obj_state - get private object state 1196 * @state: global atomic state 1197 * @obj: private object to get the state for 1198 * 1199 * This function returns the private object state for the given private object, 1200 * allocating the state if needed. It does not grab any locks as the caller is 1201 * expected to care of any required locking. 1202 * 1203 * RETURNS: 1204 * 1205 * Either the allocated state or the error code encoded into a pointer. 1206 */ 1207 struct drm_private_state * 1208 drm_atomic_get_private_obj_state(struct drm_atomic_state *state, 1209 struct drm_private_obj *obj) 1210 { 1211 int index, num_objs, i; 1212 size_t size; 1213 struct __drm_private_objs_state *arr; 1214 struct drm_private_state *obj_state; 1215 1216 for (i = 0; i < state->num_private_objs; i++) 1217 if (obj == state->private_objs[i].ptr) 1218 return state->private_objs[i].state; 1219 1220 num_objs = state->num_private_objs + 1; 1221 size = sizeof(*state->private_objs) * num_objs; 1222 arr = krealloc(state->private_objs, size, GFP_KERNEL); 1223 if (!arr) 1224 return ERR_PTR(-ENOMEM); 1225 1226 state->private_objs = arr; 1227 index = state->num_private_objs; 1228 memset(&state->private_objs[index], 0, sizeof(*state->private_objs)); 1229 1230 obj_state = obj->funcs->atomic_duplicate_state(obj); 1231 if (!obj_state) 1232 return ERR_PTR(-ENOMEM); 1233 1234 state->private_objs[index].state = obj_state; 1235 state->private_objs[index].old_state = obj->state; 1236 state->private_objs[index].new_state = obj_state; 1237 state->private_objs[index].ptr = obj; 1238 obj_state->state = state; 1239 1240 state->num_private_objs = num_objs; 1241 1242 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n", 1243 obj, obj_state, state); 1244 1245 return obj_state; 1246 } 1247 EXPORT_SYMBOL(drm_atomic_get_private_obj_state); 1248 1249 /** 1250 * drm_atomic_get_connector_state - get connector state 1251 * @state: global atomic state object 1252 * @connector: connector to get state object for 1253 * 1254 * This function returns the connector state for the given connector, 1255 * allocating it if needed. It will also grab the relevant connector lock to 1256 * make sure that the state is consistent. 1257 * 1258 * Returns: 1259 * 1260 * Either the allocated state or the error code encoded into the pointer. When 1261 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the 1262 * entire atomic sequence must be restarted. All other errors are fatal. 1263 */ 1264 struct drm_connector_state * 1265 drm_atomic_get_connector_state(struct drm_atomic_state *state, 1266 struct drm_connector *connector) 1267 { 1268 int ret, index; 1269 struct drm_mode_config *config = &connector->dev->mode_config; 1270 struct drm_connector_state *connector_state; 1271 1272 WARN_ON(!state->acquire_ctx); 1273 1274 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); 1275 if (ret) 1276 return ERR_PTR(ret); 1277 1278 index = drm_connector_index(connector); 1279 1280 if (index >= state->num_connector) { 1281 struct __drm_connnectors_state *c; 1282 int alloc = max(index + 1, config->num_connector); 1283 1284 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL); 1285 if (!c) 1286 return ERR_PTR(-ENOMEM); 1287 1288 state->connectors = c; 1289 memset(&state->connectors[state->num_connector], 0, 1290 sizeof(*state->connectors) * (alloc - state->num_connector)); 1291 1292 state->num_connector = alloc; 1293 } 1294 1295 if (state->connectors[index].state) 1296 return state->connectors[index].state; 1297 1298 connector_state = connector->funcs->atomic_duplicate_state(connector); 1299 if (!connector_state) 1300 return ERR_PTR(-ENOMEM); 1301 1302 drm_connector_get(connector); 1303 state->connectors[index].state = connector_state; 1304 state->connectors[index].old_state = connector->state; 1305 state->connectors[index].new_state = connector_state; 1306 state->connectors[index].ptr = connector; 1307 connector_state->state = state; 1308 1309 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n", 1310 connector->base.id, connector->name, 1311 connector_state, state); 1312 1313 if (connector_state->crtc) { 1314 struct drm_crtc_state *crtc_state; 1315 1316 crtc_state = drm_atomic_get_crtc_state(state, 1317 connector_state->crtc); 1318 if (IS_ERR(crtc_state)) 1319 return ERR_CAST(crtc_state); 1320 } 1321 1322 return connector_state; 1323 } 1324 EXPORT_SYMBOL(drm_atomic_get_connector_state); 1325 1326 /** 1327 * drm_atomic_connector_set_property - set property on connector. 1328 * @connector: the drm connector to set a property on 1329 * @state: the state object to update with the new property value 1330 * @property: the property to set 1331 * @val: the new property value 1332 * 1333 * This function handles generic/core properties and calls out to driver's 1334 * &drm_connector_funcs.atomic_set_property for driver properties. To ensure 1335 * consistent behavior you must call this function rather than the driver hook 1336 * directly. 1337 * 1338 * RETURNS: 1339 * Zero on success, error code on failure 1340 */ 1341 static int drm_atomic_connector_set_property(struct drm_connector *connector, 1342 struct drm_connector_state *state, struct drm_property *property, 1343 uint64_t val) 1344 { 1345 struct drm_device *dev = connector->dev; 1346 struct drm_mode_config *config = &dev->mode_config; 1347 1348 if (property == config->prop_crtc_id) { 1349 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val); 1350 return drm_atomic_set_crtc_for_connector(state, crtc); 1351 } else if (property == config->dpms_property) { 1352 /* setting DPMS property requires special handling, which 1353 * is done in legacy setprop path for us. Disallow (for 1354 * now?) atomic writes to DPMS property: 1355 */ 1356 return -EINVAL; 1357 } else if (property == config->tv_select_subconnector_property) { 1358 state->tv.subconnector = val; 1359 } else if (property == config->tv_left_margin_property) { 1360 state->tv.margins.left = val; 1361 } else if (property == config->tv_right_margin_property) { 1362 state->tv.margins.right = val; 1363 } else if (property == config->tv_top_margin_property) { 1364 state->tv.margins.top = val; 1365 } else if (property == config->tv_bottom_margin_property) { 1366 state->tv.margins.bottom = val; 1367 } else if (property == config->tv_mode_property) { 1368 state->tv.mode = val; 1369 } else if (property == config->tv_brightness_property) { 1370 state->tv.brightness = val; 1371 } else if (property == config->tv_contrast_property) { 1372 state->tv.contrast = val; 1373 } else if (property == config->tv_flicker_reduction_property) { 1374 state->tv.flicker_reduction = val; 1375 } else if (property == config->tv_overscan_property) { 1376 state->tv.overscan = val; 1377 } else if (property == config->tv_saturation_property) { 1378 state->tv.saturation = val; 1379 } else if (property == config->tv_hue_property) { 1380 state->tv.hue = val; 1381 } else if (property == config->link_status_property) { 1382 /* Never downgrade from GOOD to BAD on userspace's request here, 1383 * only hw issues can do that. 1384 * 1385 * For an atomic property the userspace doesn't need to be able 1386 * to understand all the properties, but needs to be able to 1387 * restore the state it wants on VT switch. So if the userspace 1388 * tries to change the link_status from GOOD to BAD, driver 1389 * silently rejects it and returns a 0. This prevents userspace 1390 * from accidently breaking the display when it restores the 1391 * state. 1392 */ 1393 if (state->link_status != DRM_LINK_STATUS_GOOD) 1394 state->link_status = val; 1395 } else if (property == config->aspect_ratio_property) { 1396 state->picture_aspect_ratio = val; 1397 } else if (property == config->content_type_property) { 1398 state->content_type = val; 1399 } else if (property == connector->scaling_mode_property) { 1400 state->scaling_mode = val; 1401 } else if (property == connector->content_protection_property) { 1402 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) { 1403 DRM_DEBUG_KMS("only drivers can set CP Enabled\n"); 1404 return -EINVAL; 1405 } 1406 state->content_protection = val; 1407 } else if (property == config->writeback_fb_id_property) { 1408 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val); 1409 int ret = drm_atomic_set_writeback_fb_for_connector(state, fb); 1410 if (fb) 1411 drm_framebuffer_put(fb); 1412 return ret; 1413 } else if (property == config->writeback_out_fence_ptr_property) { 1414 s32 __user *fence_ptr = u64_to_user_ptr(val); 1415 1416 return set_out_fence_for_connector(state->state, connector, 1417 fence_ptr); 1418 } else if (connector->funcs->atomic_set_property) { 1419 return connector->funcs->atomic_set_property(connector, 1420 state, property, val); 1421 } else { 1422 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n", 1423 connector->base.id, connector->name, 1424 property->base.id, property->name); 1425 return -EINVAL; 1426 } 1427 1428 return 0; 1429 } 1430 1431 static void drm_atomic_connector_print_state(struct drm_printer *p, 1432 const struct drm_connector_state *state) 1433 { 1434 struct drm_connector *connector = state->connector; 1435 1436 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name); 1437 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); 1438 1439 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) 1440 if (state->writeback_job && state->writeback_job->fb) 1441 drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id); 1442 1443 if (connector->funcs->atomic_print_state) 1444 connector->funcs->atomic_print_state(p, state); 1445 } 1446 1447 /** 1448 * drm_atomic_connector_get_property - get property value from connector state 1449 * @connector: the drm connector to set a property on 1450 * @state: the state object to get the property value from 1451 * @property: the property to set 1452 * @val: return location for the property value 1453 * 1454 * This function handles generic/core properties and calls out to driver's 1455 * &drm_connector_funcs.atomic_get_property for driver properties. To ensure 1456 * consistent behavior you must call this function rather than the driver hook 1457 * directly. 1458 * 1459 * RETURNS: 1460 * Zero on success, error code on failure 1461 */ 1462 static int 1463 drm_atomic_connector_get_property(struct drm_connector *connector, 1464 const struct drm_connector_state *state, 1465 struct drm_property *property, uint64_t *val) 1466 { 1467 struct drm_device *dev = connector->dev; 1468 struct drm_mode_config *config = &dev->mode_config; 1469 1470 if (property == config->prop_crtc_id) { 1471 *val = (state->crtc) ? state->crtc->base.id : 0; 1472 } else if (property == config->dpms_property) { 1473 *val = connector->dpms; 1474 } else if (property == config->tv_select_subconnector_property) { 1475 *val = state->tv.subconnector; 1476 } else if (property == config->tv_left_margin_property) { 1477 *val = state->tv.margins.left; 1478 } else if (property == config->tv_right_margin_property) { 1479 *val = state->tv.margins.right; 1480 } else if (property == config->tv_top_margin_property) { 1481 *val = state->tv.margins.top; 1482 } else if (property == config->tv_bottom_margin_property) { 1483 *val = state->tv.margins.bottom; 1484 } else if (property == config->tv_mode_property) { 1485 *val = state->tv.mode; 1486 } else if (property == config->tv_brightness_property) { 1487 *val = state->tv.brightness; 1488 } else if (property == config->tv_contrast_property) { 1489 *val = state->tv.contrast; 1490 } else if (property == config->tv_flicker_reduction_property) { 1491 *val = state->tv.flicker_reduction; 1492 } else if (property == config->tv_overscan_property) { 1493 *val = state->tv.overscan; 1494 } else if (property == config->tv_saturation_property) { 1495 *val = state->tv.saturation; 1496 } else if (property == config->tv_hue_property) { 1497 *val = state->tv.hue; 1498 } else if (property == config->link_status_property) { 1499 *val = state->link_status; 1500 } else if (property == config->aspect_ratio_property) { 1501 *val = state->picture_aspect_ratio; 1502 } else if (property == config->content_type_property) { 1503 *val = state->content_type; 1504 } else if (property == connector->scaling_mode_property) { 1505 *val = state->scaling_mode; 1506 } else if (property == connector->content_protection_property) { 1507 *val = state->content_protection; 1508 } else if (property == config->writeback_fb_id_property) { 1509 /* Writeback framebuffer is one-shot, write and forget */ 1510 *val = 0; 1511 } else if (property == config->writeback_out_fence_ptr_property) { 1512 *val = 0; 1513 } else if (connector->funcs->atomic_get_property) { 1514 return connector->funcs->atomic_get_property(connector, 1515 state, property, val); 1516 } else { 1517 return -EINVAL; 1518 } 1519 1520 return 0; 1521 } 1522 1523 int drm_atomic_get_property(struct drm_mode_object *obj, 1524 struct drm_property *property, uint64_t *val) 1525 { 1526 struct drm_device *dev = property->dev; 1527 int ret; 1528 1529 switch (obj->type) { 1530 case DRM_MODE_OBJECT_CONNECTOR: { 1531 struct drm_connector *connector = obj_to_connector(obj); 1532 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 1533 ret = drm_atomic_connector_get_property(connector, 1534 connector->state, property, val); 1535 break; 1536 } 1537 case DRM_MODE_OBJECT_CRTC: { 1538 struct drm_crtc *crtc = obj_to_crtc(obj); 1539 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 1540 ret = drm_atomic_crtc_get_property(crtc, 1541 crtc->state, property, val); 1542 break; 1543 } 1544 case DRM_MODE_OBJECT_PLANE: { 1545 struct drm_plane *plane = obj_to_plane(obj); 1546 WARN_ON(!drm_modeset_is_locked(&plane->mutex)); 1547 ret = drm_atomic_plane_get_property(plane, 1548 plane->state, property, val); 1549 break; 1550 } 1551 default: 1552 ret = -EINVAL; 1553 break; 1554 } 1555 1556 return ret; 1557 } 1558 1559 /** 1560 * drm_atomic_set_crtc_for_plane - set crtc for plane 1561 * @plane_state: the plane whose incoming state to update 1562 * @crtc: crtc to use for the plane 1563 * 1564 * Changing the assigned crtc for a plane requires us to grab the lock and state 1565 * for the new crtc, as needed. This function takes care of all these details 1566 * besides updating the pointer in the state object itself. 1567 * 1568 * Returns: 1569 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 1570 * then the w/w mutex code has detected a deadlock and the entire atomic 1571 * sequence must be restarted. All other errors are fatal. 1572 */ 1573 int 1574 drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, 1575 struct drm_crtc *crtc) 1576 { 1577 struct drm_plane *plane = plane_state->plane; 1578 struct drm_crtc_state *crtc_state; 1579 /* Nothing to do for same crtc*/ 1580 if (plane_state->crtc == crtc) 1581 return 0; 1582 if (plane_state->crtc) { 1583 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 1584 plane_state->crtc); 1585 if (WARN_ON(IS_ERR(crtc_state))) 1586 return PTR_ERR(crtc_state); 1587 1588 crtc_state->plane_mask &= ~drm_plane_mask(plane); 1589 } 1590 1591 plane_state->crtc = crtc; 1592 1593 if (crtc) { 1594 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 1595 crtc); 1596 if (IS_ERR(crtc_state)) 1597 return PTR_ERR(crtc_state); 1598 crtc_state->plane_mask |= drm_plane_mask(plane); 1599 } 1600 1601 if (crtc) 1602 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n", 1603 plane->base.id, plane->name, plane_state, 1604 crtc->base.id, crtc->name); 1605 else 1606 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [NOCRTC]\n", 1607 plane->base.id, plane->name, plane_state); 1608 1609 return 0; 1610 } 1611 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane); 1612 1613 /** 1614 * drm_atomic_set_fb_for_plane - set framebuffer for plane 1615 * @plane_state: atomic state object for the plane 1616 * @fb: fb to use for the plane 1617 * 1618 * Changing the assigned framebuffer for a plane requires us to grab a reference 1619 * to the new fb and drop the reference to the old fb, if there is one. This 1620 * function takes care of all these details besides updating the pointer in the 1621 * state object itself. 1622 */ 1623 void 1624 drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, 1625 struct drm_framebuffer *fb) 1626 { 1627 struct drm_plane *plane = plane_state->plane; 1628 1629 if (fb) 1630 DRM_DEBUG_ATOMIC("Set [FB:%d] for [PLANE:%d:%s] state %p\n", 1631 fb->base.id, plane->base.id, plane->name, 1632 plane_state); 1633 else 1634 DRM_DEBUG_ATOMIC("Set [NOFB] for [PLANE:%d:%s] state %p\n", 1635 plane->base.id, plane->name, plane_state); 1636 1637 drm_framebuffer_assign(&plane_state->fb, fb); 1638 } 1639 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); 1640 1641 /** 1642 * drm_atomic_set_fence_for_plane - set fence for plane 1643 * @plane_state: atomic state object for the plane 1644 * @fence: dma_fence to use for the plane 1645 * 1646 * Helper to setup the plane_state fence in case it is not set yet. 1647 * By using this drivers doesn't need to worry if the user choose 1648 * implicit or explicit fencing. 1649 * 1650 * This function will not set the fence to the state if it was set 1651 * via explicit fencing interfaces on the atomic ioctl. In that case it will 1652 * drop the reference to the fence as we are not storing it anywhere. 1653 * Otherwise, if &drm_plane_state.fence is not set this function we just set it 1654 * with the received implicit fence. In both cases this function consumes a 1655 * reference for @fence. 1656 * 1657 * This way explicit fencing can be used to overrule implicit fencing, which is 1658 * important to make explicit fencing use-cases work: One example is using one 1659 * buffer for 2 screens with different refresh rates. Implicit fencing will 1660 * clamp rendering to the refresh rate of the slower screen, whereas explicit 1661 * fence allows 2 independent render and display loops on a single buffer. If a 1662 * driver allows obeys both implicit and explicit fences for plane updates, then 1663 * it will break all the benefits of explicit fencing. 1664 */ 1665 void 1666 drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state, 1667 struct dma_fence *fence) 1668 { 1669 if (plane_state->fence) { 1670 dma_fence_put(fence); 1671 return; 1672 } 1673 1674 plane_state->fence = fence; 1675 } 1676 EXPORT_SYMBOL(drm_atomic_set_fence_for_plane); 1677 1678 /** 1679 * drm_atomic_set_crtc_for_connector - set crtc for connector 1680 * @conn_state: atomic state object for the connector 1681 * @crtc: crtc to use for the connector 1682 * 1683 * Changing the assigned crtc for a connector requires us to grab the lock and 1684 * state for the new crtc, as needed. This function takes care of all these 1685 * details besides updating the pointer in the state object itself. 1686 * 1687 * Returns: 1688 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 1689 * then the w/w mutex code has detected a deadlock and the entire atomic 1690 * sequence must be restarted. All other errors are fatal. 1691 */ 1692 int 1693 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, 1694 struct drm_crtc *crtc) 1695 { 1696 struct drm_connector *connector = conn_state->connector; 1697 struct drm_crtc_state *crtc_state; 1698 1699 if (conn_state->crtc == crtc) 1700 return 0; 1701 1702 if (conn_state->crtc) { 1703 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state, 1704 conn_state->crtc); 1705 1706 crtc_state->connector_mask &= 1707 ~drm_connector_mask(conn_state->connector); 1708 1709 drm_connector_put(conn_state->connector); 1710 conn_state->crtc = NULL; 1711 } 1712 1713 if (crtc) { 1714 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); 1715 if (IS_ERR(crtc_state)) 1716 return PTR_ERR(crtc_state); 1717 1718 crtc_state->connector_mask |= 1719 drm_connector_mask(conn_state->connector); 1720 1721 drm_connector_get(conn_state->connector); 1722 conn_state->crtc = crtc; 1723 1724 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n", 1725 connector->base.id, connector->name, 1726 conn_state, crtc->base.id, crtc->name); 1727 } else { 1728 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n", 1729 connector->base.id, connector->name, 1730 conn_state); 1731 } 1732 1733 return 0; 1734 } 1735 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); 1736 1737 /* 1738 * drm_atomic_get_writeback_job - return or allocate a writeback job 1739 * @conn_state: Connector state to get the job for 1740 * 1741 * Writeback jobs have a different lifetime to the atomic state they are 1742 * associated with. This convenience function takes care of allocating a job 1743 * if there isn't yet one associated with the connector state, otherwise 1744 * it just returns the existing job. 1745 * 1746 * Returns: The writeback job for the given connector state 1747 */ 1748 static struct drm_writeback_job * 1749 drm_atomic_get_writeback_job(struct drm_connector_state *conn_state) 1750 { 1751 WARN_ON(conn_state->connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK); 1752 1753 if (!conn_state->writeback_job) 1754 conn_state->writeback_job = 1755 kzalloc(sizeof(*conn_state->writeback_job), GFP_KERNEL); 1756 1757 return conn_state->writeback_job; 1758 } 1759 1760 /** 1761 * drm_atomic_set_writeback_fb_for_connector - set writeback framebuffer 1762 * @conn_state: atomic state object for the connector 1763 * @fb: fb to use for the connector 1764 * 1765 * This is used to set the framebuffer for a writeback connector, which outputs 1766 * to a buffer instead of an actual physical connector. 1767 * Changing the assigned framebuffer requires us to grab a reference to the new 1768 * fb and drop the reference to the old fb, if there is one. This function 1769 * takes care of all these details besides updating the pointer in the 1770 * state object itself. 1771 * 1772 * Note: The only way conn_state can already have an fb set is if the commit 1773 * sets the property more than once. 1774 * 1775 * See also: drm_writeback_connector_init() 1776 * 1777 * Returns: 0 on success 1778 */ 1779 int drm_atomic_set_writeback_fb_for_connector( 1780 struct drm_connector_state *conn_state, 1781 struct drm_framebuffer *fb) 1782 { 1783 struct drm_writeback_job *job = 1784 drm_atomic_get_writeback_job(conn_state); 1785 if (!job) 1786 return -ENOMEM; 1787 1788 drm_framebuffer_assign(&job->fb, fb); 1789 1790 if (fb) 1791 DRM_DEBUG_ATOMIC("Set [FB:%d] for connector state %p\n", 1792 fb->base.id, conn_state); 1793 else 1794 DRM_DEBUG_ATOMIC("Set [NOFB] for connector state %p\n", 1795 conn_state); 1796 1797 return 0; 1798 } 1799 EXPORT_SYMBOL(drm_atomic_set_writeback_fb_for_connector); 1800 1801 /** 1802 * drm_atomic_add_affected_connectors - add connectors for crtc 1803 * @state: atomic state 1804 * @crtc: DRM crtc 1805 * 1806 * This function walks the current configuration and adds all connectors 1807 * currently using @crtc to the atomic configuration @state. Note that this 1808 * function must acquire the connection mutex. This can potentially cause 1809 * unneeded seralization if the update is just for the planes on one crtc. Hence 1810 * drivers and helpers should only call this when really needed (e.g. when a 1811 * full modeset needs to happen due to some change). 1812 * 1813 * Returns: 1814 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 1815 * then the w/w mutex code has detected a deadlock and the entire atomic 1816 * sequence must be restarted. All other errors are fatal. 1817 */ 1818 int 1819 drm_atomic_add_affected_connectors(struct drm_atomic_state *state, 1820 struct drm_crtc *crtc) 1821 { 1822 struct drm_mode_config *config = &state->dev->mode_config; 1823 struct drm_connector *connector; 1824 struct drm_connector_state *conn_state; 1825 struct drm_connector_list_iter conn_iter; 1826 struct drm_crtc_state *crtc_state; 1827 int ret; 1828 1829 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1830 if (IS_ERR(crtc_state)) 1831 return PTR_ERR(crtc_state); 1832 1833 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); 1834 if (ret) 1835 return ret; 1836 1837 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n", 1838 crtc->base.id, crtc->name, state); 1839 1840 /* 1841 * Changed connectors are already in @state, so only need to look 1842 * at the connector_mask in crtc_state. 1843 */ 1844 drm_connector_list_iter_begin(state->dev, &conn_iter); 1845 drm_for_each_connector_iter(connector, &conn_iter) { 1846 if (!(crtc_state->connector_mask & drm_connector_mask(connector))) 1847 continue; 1848 1849 conn_state = drm_atomic_get_connector_state(state, connector); 1850 if (IS_ERR(conn_state)) { 1851 drm_connector_list_iter_end(&conn_iter); 1852 return PTR_ERR(conn_state); 1853 } 1854 } 1855 drm_connector_list_iter_end(&conn_iter); 1856 1857 return 0; 1858 } 1859 EXPORT_SYMBOL(drm_atomic_add_affected_connectors); 1860 1861 /** 1862 * drm_atomic_add_affected_planes - add planes for crtc 1863 * @state: atomic state 1864 * @crtc: DRM crtc 1865 * 1866 * This function walks the current configuration and adds all planes 1867 * currently used by @crtc to the atomic configuration @state. This is useful 1868 * when an atomic commit also needs to check all currently enabled plane on 1869 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC 1870 * to avoid special code to force-enable all planes. 1871 * 1872 * Since acquiring a plane state will always also acquire the w/w mutex of the 1873 * current CRTC for that plane (if there is any) adding all the plane states for 1874 * a CRTC will not reduce parallism of atomic updates. 1875 * 1876 * Returns: 1877 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 1878 * then the w/w mutex code has detected a deadlock and the entire atomic 1879 * sequence must be restarted. All other errors are fatal. 1880 */ 1881 int 1882 drm_atomic_add_affected_planes(struct drm_atomic_state *state, 1883 struct drm_crtc *crtc) 1884 { 1885 struct drm_plane *plane; 1886 1887 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc)); 1888 1889 DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n", 1890 crtc->base.id, crtc->name, state); 1891 1892 drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) { 1893 struct drm_plane_state *plane_state = 1894 drm_atomic_get_plane_state(state, plane); 1895 1896 if (IS_ERR(plane_state)) 1897 return PTR_ERR(plane_state); 1898 } 1899 return 0; 1900 } 1901 EXPORT_SYMBOL(drm_atomic_add_affected_planes); 1902 1903 /** 1904 * drm_atomic_check_only - check whether a given config would work 1905 * @state: atomic configuration to check 1906 * 1907 * Note that this function can return -EDEADLK if the driver needed to acquire 1908 * more locks but encountered a deadlock. The caller must then do the usual w/w 1909 * backoff dance and restart. All other errors are fatal. 1910 * 1911 * Returns: 1912 * 0 on success, negative error code on failure. 1913 */ 1914 int drm_atomic_check_only(struct drm_atomic_state *state) 1915 { 1916 struct drm_device *dev = state->dev; 1917 struct drm_mode_config *config = &dev->mode_config; 1918 struct drm_plane *plane; 1919 struct drm_plane_state *plane_state; 1920 struct drm_crtc *crtc; 1921 struct drm_crtc_state *crtc_state; 1922 struct drm_connector *conn; 1923 struct drm_connector_state *conn_state; 1924 int i, ret = 0; 1925 1926 DRM_DEBUG_ATOMIC("checking %p\n", state); 1927 1928 for_each_new_plane_in_state(state, plane, plane_state, i) { 1929 ret = drm_atomic_plane_check(plane, plane_state); 1930 if (ret) { 1931 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n", 1932 plane->base.id, plane->name); 1933 return ret; 1934 } 1935 } 1936 1937 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1938 ret = drm_atomic_crtc_check(crtc, crtc_state); 1939 if (ret) { 1940 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n", 1941 crtc->base.id, crtc->name); 1942 return ret; 1943 } 1944 } 1945 1946 for_each_new_connector_in_state(state, conn, conn_state, i) { 1947 ret = drm_atomic_connector_check(conn, conn_state); 1948 if (ret) { 1949 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n", 1950 conn->base.id, conn->name); 1951 return ret; 1952 } 1953 } 1954 1955 if (config->funcs->atomic_check) { 1956 ret = config->funcs->atomic_check(state->dev, state); 1957 1958 if (ret) { 1959 DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n", 1960 state, ret); 1961 return ret; 1962 } 1963 } 1964 1965 if (!state->allow_modeset) { 1966 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1967 if (drm_atomic_crtc_needs_modeset(crtc_state)) { 1968 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n", 1969 crtc->base.id, crtc->name); 1970 return -EINVAL; 1971 } 1972 } 1973 } 1974 1975 return 0; 1976 } 1977 EXPORT_SYMBOL(drm_atomic_check_only); 1978 1979 /** 1980 * drm_atomic_commit - commit configuration atomically 1981 * @state: atomic configuration to check 1982 * 1983 * Note that this function can return -EDEADLK if the driver needed to acquire 1984 * more locks but encountered a deadlock. The caller must then do the usual w/w 1985 * backoff dance and restart. All other errors are fatal. 1986 * 1987 * This function will take its own reference on @state. 1988 * Callers should always release their reference with drm_atomic_state_put(). 1989 * 1990 * Returns: 1991 * 0 on success, negative error code on failure. 1992 */ 1993 int drm_atomic_commit(struct drm_atomic_state *state) 1994 { 1995 struct drm_mode_config *config = &state->dev->mode_config; 1996 int ret; 1997 1998 ret = drm_atomic_check_only(state); 1999 if (ret) 2000 return ret; 2001 2002 DRM_DEBUG_ATOMIC("committing %p\n", state); 2003 2004 return config->funcs->atomic_commit(state->dev, state, false); 2005 } 2006 EXPORT_SYMBOL(drm_atomic_commit); 2007 2008 /** 2009 * drm_atomic_nonblocking_commit - atomic nonblocking commit 2010 * @state: atomic configuration to check 2011 * 2012 * Note that this function can return -EDEADLK if the driver needed to acquire 2013 * more locks but encountered a deadlock. The caller must then do the usual w/w 2014 * backoff dance and restart. All other errors are fatal. 2015 * 2016 * This function will take its own reference on @state. 2017 * Callers should always release their reference with drm_atomic_state_put(). 2018 * 2019 * Returns: 2020 * 0 on success, negative error code on failure. 2021 */ 2022 int drm_atomic_nonblocking_commit(struct drm_atomic_state *state) 2023 { 2024 struct drm_mode_config *config = &state->dev->mode_config; 2025 int ret; 2026 2027 ret = drm_atomic_check_only(state); 2028 if (ret) 2029 return ret; 2030 2031 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state); 2032 2033 return config->funcs->atomic_commit(state->dev, state, true); 2034 } 2035 EXPORT_SYMBOL(drm_atomic_nonblocking_commit); 2036 2037 static void drm_atomic_print_state(const struct drm_atomic_state *state) 2038 { 2039 struct drm_printer p = drm_info_printer(state->dev->dev); 2040 struct drm_plane *plane; 2041 struct drm_plane_state *plane_state; 2042 struct drm_crtc *crtc; 2043 struct drm_crtc_state *crtc_state; 2044 struct drm_connector *connector; 2045 struct drm_connector_state *connector_state; 2046 int i; 2047 2048 DRM_DEBUG_ATOMIC("checking %p\n", state); 2049 2050 for_each_new_plane_in_state(state, plane, plane_state, i) 2051 drm_atomic_plane_print_state(&p, plane_state); 2052 2053 for_each_new_crtc_in_state(state, crtc, crtc_state, i) 2054 drm_atomic_crtc_print_state(&p, crtc_state); 2055 2056 for_each_new_connector_in_state(state, connector, connector_state, i) 2057 drm_atomic_connector_print_state(&p, connector_state); 2058 } 2059 2060 static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p, 2061 bool take_locks) 2062 { 2063 struct drm_mode_config *config = &dev->mode_config; 2064 struct drm_plane *plane; 2065 struct drm_crtc *crtc; 2066 struct drm_connector *connector; 2067 struct drm_connector_list_iter conn_iter; 2068 2069 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 2070 return; 2071 2072 list_for_each_entry(plane, &config->plane_list, head) { 2073 if (take_locks) 2074 drm_modeset_lock(&plane->mutex, NULL); 2075 drm_atomic_plane_print_state(p, plane->state); 2076 if (take_locks) 2077 drm_modeset_unlock(&plane->mutex); 2078 } 2079 2080 list_for_each_entry(crtc, &config->crtc_list, head) { 2081 if (take_locks) 2082 drm_modeset_lock(&crtc->mutex, NULL); 2083 drm_atomic_crtc_print_state(p, crtc->state); 2084 if (take_locks) 2085 drm_modeset_unlock(&crtc->mutex); 2086 } 2087 2088 drm_connector_list_iter_begin(dev, &conn_iter); 2089 if (take_locks) 2090 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2091 drm_for_each_connector_iter(connector, &conn_iter) 2092 drm_atomic_connector_print_state(p, connector->state); 2093 if (take_locks) 2094 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2095 drm_connector_list_iter_end(&conn_iter); 2096 } 2097 2098 /** 2099 * drm_state_dump - dump entire device atomic state 2100 * @dev: the drm device 2101 * @p: where to print the state to 2102 * 2103 * Just for debugging. Drivers might want an option to dump state 2104 * to dmesg in case of error irq's. (Hint, you probably want to 2105 * ratelimit this!) 2106 * 2107 * The caller must drm_modeset_lock_all(), or if this is called 2108 * from error irq handler, it should not be enabled by default. 2109 * (Ie. if you are debugging errors you might not care that this 2110 * is racey. But calling this without all modeset locks held is 2111 * not inherently safe.) 2112 */ 2113 void drm_state_dump(struct drm_device *dev, struct drm_printer *p) 2114 { 2115 __drm_state_dump(dev, p, false); 2116 } 2117 EXPORT_SYMBOL(drm_state_dump); 2118 2119 #ifdef CONFIG_DEBUG_FS 2120 static int drm_state_info(struct seq_file *m, void *data) 2121 { 2122 struct drm_info_node *node = (struct drm_info_node *) m->private; 2123 struct drm_device *dev = node->minor->dev; 2124 struct drm_printer p = drm_seq_file_printer(m); 2125 2126 __drm_state_dump(dev, &p, true); 2127 2128 return 0; 2129 } 2130 2131 /* any use in debugfs files to dump individual planes/crtc/etc? */ 2132 static const struct drm_info_list drm_atomic_debugfs_list[] = { 2133 {"state", drm_state_info, 0}, 2134 }; 2135 2136 int drm_atomic_debugfs_init(struct drm_minor *minor) 2137 { 2138 return drm_debugfs_create_files(drm_atomic_debugfs_list, 2139 ARRAY_SIZE(drm_atomic_debugfs_list), 2140 minor->debugfs_root, minor); 2141 } 2142 #endif 2143 2144 /* 2145 * The big monster ioctl 2146 */ 2147 2148 static struct drm_pending_vblank_event *create_vblank_event( 2149 struct drm_crtc *crtc, uint64_t user_data) 2150 { 2151 struct drm_pending_vblank_event *e = NULL; 2152 2153 e = kzalloc(sizeof *e, GFP_KERNEL); 2154 if (!e) 2155 return NULL; 2156 2157 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 2158 e->event.base.length = sizeof(e->event); 2159 e->event.vbl.crtc_id = crtc->base.id; 2160 e->event.vbl.user_data = user_data; 2161 2162 return e; 2163 } 2164 2165 int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state, 2166 struct drm_connector *connector, 2167 int mode) 2168 { 2169 struct drm_connector *tmp_connector; 2170 struct drm_connector_state *new_conn_state; 2171 struct drm_crtc *crtc; 2172 struct drm_crtc_state *crtc_state; 2173 int i, ret, old_mode = connector->dpms; 2174 bool active = false; 2175 2176 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, 2177 state->acquire_ctx); 2178 if (ret) 2179 return ret; 2180 2181 if (mode != DRM_MODE_DPMS_ON) 2182 mode = DRM_MODE_DPMS_OFF; 2183 connector->dpms = mode; 2184 2185 crtc = connector->state->crtc; 2186 if (!crtc) 2187 goto out; 2188 ret = drm_atomic_add_affected_connectors(state, crtc); 2189 if (ret) 2190 goto out; 2191 2192 crtc_state = drm_atomic_get_crtc_state(state, crtc); 2193 if (IS_ERR(crtc_state)) { 2194 ret = PTR_ERR(crtc_state); 2195 goto out; 2196 } 2197 2198 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) { 2199 if (new_conn_state->crtc != crtc) 2200 continue; 2201 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { 2202 active = true; 2203 break; 2204 } 2205 } 2206 2207 crtc_state->active = active; 2208 ret = drm_atomic_commit(state); 2209 out: 2210 if (ret != 0) 2211 connector->dpms = old_mode; 2212 return ret; 2213 } 2214 2215 int drm_atomic_set_property(struct drm_atomic_state *state, 2216 struct drm_mode_object *obj, 2217 struct drm_property *prop, 2218 uint64_t prop_value) 2219 { 2220 struct drm_mode_object *ref; 2221 int ret; 2222 2223 if (!drm_property_change_valid_get(prop, prop_value, &ref)) 2224 return -EINVAL; 2225 2226 switch (obj->type) { 2227 case DRM_MODE_OBJECT_CONNECTOR: { 2228 struct drm_connector *connector = obj_to_connector(obj); 2229 struct drm_connector_state *connector_state; 2230 2231 connector_state = drm_atomic_get_connector_state(state, connector); 2232 if (IS_ERR(connector_state)) { 2233 ret = PTR_ERR(connector_state); 2234 break; 2235 } 2236 2237 ret = drm_atomic_connector_set_property(connector, 2238 connector_state, prop, prop_value); 2239 break; 2240 } 2241 case DRM_MODE_OBJECT_CRTC: { 2242 struct drm_crtc *crtc = obj_to_crtc(obj); 2243 struct drm_crtc_state *crtc_state; 2244 2245 crtc_state = drm_atomic_get_crtc_state(state, crtc); 2246 if (IS_ERR(crtc_state)) { 2247 ret = PTR_ERR(crtc_state); 2248 break; 2249 } 2250 2251 ret = drm_atomic_crtc_set_property(crtc, 2252 crtc_state, prop, prop_value); 2253 break; 2254 } 2255 case DRM_MODE_OBJECT_PLANE: { 2256 struct drm_plane *plane = obj_to_plane(obj); 2257 struct drm_plane_state *plane_state; 2258 2259 plane_state = drm_atomic_get_plane_state(state, plane); 2260 if (IS_ERR(plane_state)) { 2261 ret = PTR_ERR(plane_state); 2262 break; 2263 } 2264 2265 ret = drm_atomic_plane_set_property(plane, 2266 plane_state, prop, prop_value); 2267 break; 2268 } 2269 default: 2270 ret = -EINVAL; 2271 break; 2272 } 2273 2274 drm_property_change_valid_put(prop, ref); 2275 return ret; 2276 } 2277 2278 /** 2279 * DOC: explicit fencing properties 2280 * 2281 * Explicit fencing allows userspace to control the buffer synchronization 2282 * between devices. A Fence or a group of fences are transfered to/from 2283 * userspace using Sync File fds and there are two DRM properties for that. 2284 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and 2285 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. 2286 * 2287 * As a contrast, with implicit fencing the kernel keeps track of any 2288 * ongoing rendering, and automatically ensures that the atomic update waits 2289 * for any pending rendering to complete. For shared buffers represented with 2290 * a &struct dma_buf this is tracked in &struct reservation_object. 2291 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org), 2292 * whereas explicit fencing is what Android wants. 2293 * 2294 * "IN_FENCE_FD”: 2295 * Use this property to pass a fence that DRM should wait on before 2296 * proceeding with the Atomic Commit request and show the framebuffer for 2297 * the plane on the screen. The fence can be either a normal fence or a 2298 * merged one, the sync_file framework will handle both cases and use a 2299 * fence_array if a merged fence is received. Passing -1 here means no 2300 * fences to wait on. 2301 * 2302 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag 2303 * it will only check if the Sync File is a valid one. 2304 * 2305 * On the driver side the fence is stored on the @fence parameter of 2306 * &struct drm_plane_state. Drivers which also support implicit fencing 2307 * should set the implicit fence using drm_atomic_set_fence_for_plane(), 2308 * to make sure there's consistent behaviour between drivers in precedence 2309 * of implicit vs. explicit fencing. 2310 * 2311 * "OUT_FENCE_PTR”: 2312 * Use this property to pass a file descriptor pointer to DRM. Once the 2313 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with 2314 * the file descriptor number of a Sync File. This Sync File contains the 2315 * CRTC fence that will be signaled when all framebuffers present on the 2316 * Atomic Commit * request for that given CRTC are scanned out on the 2317 * screen. 2318 * 2319 * The Atomic Commit request fails if a invalid pointer is passed. If the 2320 * Atomic Commit request fails for any other reason the out fence fd 2321 * returned will be -1. On a Atomic Commit with the 2322 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. 2323 * 2324 * Note that out-fences don't have a special interface to drivers and are 2325 * internally represented by a &struct drm_pending_vblank_event in struct 2326 * &drm_crtc_state, which is also used by the nonblocking atomic commit 2327 * helpers and for the DRM event handling for existing userspace. 2328 */ 2329 2330 struct drm_out_fence_state { 2331 s32 __user *out_fence_ptr; 2332 struct sync_file *sync_file; 2333 int fd; 2334 }; 2335 2336 static int setup_out_fence(struct drm_out_fence_state *fence_state, 2337 struct dma_fence *fence) 2338 { 2339 fence_state->fd = get_unused_fd_flags(O_CLOEXEC); 2340 if (fence_state->fd < 0) 2341 return fence_state->fd; 2342 2343 if (put_user(fence_state->fd, fence_state->out_fence_ptr)) 2344 return -EFAULT; 2345 2346 fence_state->sync_file = sync_file_create(fence); 2347 if (!fence_state->sync_file) 2348 return -ENOMEM; 2349 2350 return 0; 2351 } 2352 2353 static int prepare_signaling(struct drm_device *dev, 2354 struct drm_atomic_state *state, 2355 struct drm_mode_atomic *arg, 2356 struct drm_file *file_priv, 2357 struct drm_out_fence_state **fence_state, 2358 unsigned int *num_fences) 2359 { 2360 struct drm_crtc *crtc; 2361 struct drm_crtc_state *crtc_state; 2362 struct drm_connector *conn; 2363 struct drm_connector_state *conn_state; 2364 int i, c = 0, ret; 2365 2366 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) 2367 return 0; 2368 2369 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 2370 s32 __user *fence_ptr; 2371 2372 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); 2373 2374 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { 2375 struct drm_pending_vblank_event *e; 2376 2377 e = create_vblank_event(crtc, arg->user_data); 2378 if (!e) 2379 return -ENOMEM; 2380 2381 crtc_state->event = e; 2382 } 2383 2384 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { 2385 struct drm_pending_vblank_event *e = crtc_state->event; 2386 2387 if (!file_priv) 2388 continue; 2389 2390 ret = drm_event_reserve_init(dev, file_priv, &e->base, 2391 &e->event.base); 2392 if (ret) { 2393 kfree(e); 2394 crtc_state->event = NULL; 2395 return ret; 2396 } 2397 } 2398 2399 if (fence_ptr) { 2400 struct dma_fence *fence; 2401 struct drm_out_fence_state *f; 2402 2403 f = krealloc(*fence_state, sizeof(**fence_state) * 2404 (*num_fences + 1), GFP_KERNEL); 2405 if (!f) 2406 return -ENOMEM; 2407 2408 memset(&f[*num_fences], 0, sizeof(*f)); 2409 2410 f[*num_fences].out_fence_ptr = fence_ptr; 2411 *fence_state = f; 2412 2413 fence = drm_crtc_create_fence(crtc); 2414 if (!fence) 2415 return -ENOMEM; 2416 2417 ret = setup_out_fence(&f[(*num_fences)++], fence); 2418 if (ret) { 2419 dma_fence_put(fence); 2420 return ret; 2421 } 2422 2423 crtc_state->event->base.fence = fence; 2424 } 2425 2426 c++; 2427 } 2428 2429 for_each_new_connector_in_state(state, conn, conn_state, i) { 2430 struct drm_writeback_job *job; 2431 struct drm_out_fence_state *f; 2432 struct dma_fence *fence; 2433 s32 __user *fence_ptr; 2434 2435 fence_ptr = get_out_fence_for_connector(state, conn); 2436 if (!fence_ptr) 2437 continue; 2438 2439 job = drm_atomic_get_writeback_job(conn_state); 2440 if (!job) 2441 return -ENOMEM; 2442 2443 f = krealloc(*fence_state, sizeof(**fence_state) * 2444 (*num_fences + 1), GFP_KERNEL); 2445 if (!f) 2446 return -ENOMEM; 2447 2448 memset(&f[*num_fences], 0, sizeof(*f)); 2449 2450 f[*num_fences].out_fence_ptr = fence_ptr; 2451 *fence_state = f; 2452 2453 fence = drm_writeback_get_out_fence((struct drm_writeback_connector *)conn); 2454 if (!fence) 2455 return -ENOMEM; 2456 2457 ret = setup_out_fence(&f[(*num_fences)++], fence); 2458 if (ret) { 2459 dma_fence_put(fence); 2460 return ret; 2461 } 2462 2463 job->out_fence = fence; 2464 } 2465 2466 /* 2467 * Having this flag means user mode pends on event which will never 2468 * reach due to lack of at least one CRTC for signaling 2469 */ 2470 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) 2471 return -EINVAL; 2472 2473 return 0; 2474 } 2475 2476 static void complete_signaling(struct drm_device *dev, 2477 struct drm_atomic_state *state, 2478 struct drm_out_fence_state *fence_state, 2479 unsigned int num_fences, 2480 bool install_fds) 2481 { 2482 struct drm_crtc *crtc; 2483 struct drm_crtc_state *crtc_state; 2484 int i; 2485 2486 if (install_fds) { 2487 for (i = 0; i < num_fences; i++) 2488 fd_install(fence_state[i].fd, 2489 fence_state[i].sync_file->file); 2490 2491 kfree(fence_state); 2492 return; 2493 } 2494 2495 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 2496 struct drm_pending_vblank_event *event = crtc_state->event; 2497 /* 2498 * Free the allocated event. drm_atomic_helper_setup_commit 2499 * can allocate an event too, so only free it if it's ours 2500 * to prevent a double free in drm_atomic_state_clear. 2501 */ 2502 if (event && (event->base.fence || event->base.file_priv)) { 2503 drm_event_cancel_free(dev, &event->base); 2504 crtc_state->event = NULL; 2505 } 2506 } 2507 2508 if (!fence_state) 2509 return; 2510 2511 for (i = 0; i < num_fences; i++) { 2512 if (fence_state[i].sync_file) 2513 fput(fence_state[i].sync_file->file); 2514 if (fence_state[i].fd >= 0) 2515 put_unused_fd(fence_state[i].fd); 2516 2517 /* If this fails log error to the user */ 2518 if (fence_state[i].out_fence_ptr && 2519 put_user(-1, fence_state[i].out_fence_ptr)) 2520 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n"); 2521 } 2522 2523 kfree(fence_state); 2524 } 2525 2526 int drm_mode_atomic_ioctl(struct drm_device *dev, 2527 void *data, struct drm_file *file_priv) 2528 { 2529 struct drm_mode_atomic *arg = data; 2530 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); 2531 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); 2532 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 2533 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); 2534 unsigned int copied_objs, copied_props; 2535 struct drm_atomic_state *state; 2536 struct drm_modeset_acquire_ctx ctx; 2537 struct drm_out_fence_state *fence_state; 2538 int ret = 0; 2539 unsigned int i, j, num_fences; 2540 2541 /* disallow for drivers not supporting atomic: */ 2542 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 2543 return -EINVAL; 2544 2545 /* disallow for userspace that has not enabled atomic cap (even 2546 * though this may be a bit overkill, since legacy userspace 2547 * wouldn't know how to call this ioctl) 2548 */ 2549 if (!file_priv->atomic) 2550 return -EINVAL; 2551 2552 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) 2553 return -EINVAL; 2554 2555 if (arg->reserved) 2556 return -EINVAL; 2557 2558 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) && 2559 !dev->mode_config.async_page_flip) 2560 return -EINVAL; 2561 2562 /* can't test and expect an event at the same time. */ 2563 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && 2564 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) 2565 return -EINVAL; 2566 2567 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); 2568 2569 state = drm_atomic_state_alloc(dev); 2570 if (!state) 2571 return -ENOMEM; 2572 2573 state->acquire_ctx = &ctx; 2574 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); 2575 2576 retry: 2577 copied_objs = 0; 2578 copied_props = 0; 2579 fence_state = NULL; 2580 num_fences = 0; 2581 2582 for (i = 0; i < arg->count_objs; i++) { 2583 uint32_t obj_id, count_props; 2584 struct drm_mode_object *obj; 2585 2586 if (get_user(obj_id, objs_ptr + copied_objs)) { 2587 ret = -EFAULT; 2588 goto out; 2589 } 2590 2591 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY); 2592 if (!obj) { 2593 ret = -ENOENT; 2594 goto out; 2595 } 2596 2597 if (!obj->properties) { 2598 drm_mode_object_put(obj); 2599 ret = -ENOENT; 2600 goto out; 2601 } 2602 2603 if (get_user(count_props, count_props_ptr + copied_objs)) { 2604 drm_mode_object_put(obj); 2605 ret = -EFAULT; 2606 goto out; 2607 } 2608 2609 copied_objs++; 2610 2611 for (j = 0; j < count_props; j++) { 2612 uint32_t prop_id; 2613 uint64_t prop_value; 2614 struct drm_property *prop; 2615 2616 if (get_user(prop_id, props_ptr + copied_props)) { 2617 drm_mode_object_put(obj); 2618 ret = -EFAULT; 2619 goto out; 2620 } 2621 2622 prop = drm_mode_obj_find_prop_id(obj, prop_id); 2623 if (!prop) { 2624 drm_mode_object_put(obj); 2625 ret = -ENOENT; 2626 goto out; 2627 } 2628 2629 if (copy_from_user(&prop_value, 2630 prop_values_ptr + copied_props, 2631 sizeof(prop_value))) { 2632 drm_mode_object_put(obj); 2633 ret = -EFAULT; 2634 goto out; 2635 } 2636 2637 ret = drm_atomic_set_property(state, obj, prop, 2638 prop_value); 2639 if (ret) { 2640 drm_mode_object_put(obj); 2641 goto out; 2642 } 2643 2644 copied_props++; 2645 } 2646 2647 drm_mode_object_put(obj); 2648 } 2649 2650 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, 2651 &num_fences); 2652 if (ret) 2653 goto out; 2654 2655 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { 2656 ret = drm_atomic_check_only(state); 2657 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { 2658 ret = drm_atomic_nonblocking_commit(state); 2659 } else { 2660 if (unlikely(drm_debug & DRM_UT_STATE)) 2661 drm_atomic_print_state(state); 2662 2663 ret = drm_atomic_commit(state); 2664 } 2665 2666 out: 2667 complete_signaling(dev, state, fence_state, num_fences, !ret); 2668 2669 if (ret == -EDEADLK) { 2670 drm_atomic_state_clear(state); 2671 ret = drm_modeset_backoff(&ctx); 2672 if (!ret) 2673 goto retry; 2674 } 2675 2676 drm_atomic_state_put(state); 2677 2678 drm_modeset_drop_locks(&ctx); 2679 drm_modeset_acquire_fini(&ctx); 2680 2681 return ret; 2682 } 2683