1/* 2 * Copyright (C) 2014 Red Hat 3 * Copyright (C) 2014 Intel Corp. 4 * Copyright (C) 2018 Intel Corp. 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#include <drm/drm_atomic_uapi.h> 30#include <drm/drm_atomic.h> 31#include <drm/drm_print.h> 32#include <drm/drm_drv.h> 33#include <drm/drm_writeback.h> 34#include <drm/drm_vblank.h> 35 36#include <linux/dma-fence.h> 37#include <linux/uaccess.h> 38#include <linux/sync_file.h> 39#include <linux/file.h> 40 41#include "drm_crtc_internal.h" 42 43/** 44 * DOC: overview 45 * 46 * This file contains the marshalling and demarshalling glue for the atomic UAPI 47 * in all its forms: The monster ATOMIC IOCTL itself, code for GET_PROPERTY and 48 * SET_PROPERTY IOCTLs. Plus interface functions for compatibility helpers and 49 * drivers which have special needs to construct their own atomic updates, e.g. 50 * for load detect or similiar. 51 */ 52 53/** 54 * drm_atomic_set_mode_for_crtc - set mode for CRTC 55 * @state: the CRTC whose incoming state to update 56 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable 57 * 58 * Set a mode (originating from the kernel) on the desired CRTC state and update 59 * the enable property. 60 * 61 * RETURNS: 62 * Zero on success, error code on failure. Cannot return -EDEADLK. 63 */ 64int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state, 65 const struct drm_display_mode *mode) 66{ 67 struct drm_crtc *crtc = state->crtc; 68 struct drm_mode_modeinfo umode; 69 70 /* Early return for no change. */ 71 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0) 72 return 0; 73 74 drm_property_blob_put(state->mode_blob); 75 state->mode_blob = NULL; 76 77 if (mode) { 78 struct drm_property_blob *blob; 79 80 drm_mode_convert_to_umode(&umode, mode); 81 blob = drm_property_create_blob(crtc->dev, 82 sizeof(umode), &umode); 83 if (IS_ERR(blob)) 84 return PTR_ERR(blob); 85 86 drm_mode_copy(&state->mode, mode); 87 88 state->mode_blob = blob; 89 state->enable = true; 90 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 91 mode->name, crtc->base.id, crtc->name, state); 92 } else { 93 memset(&state->mode, 0, sizeof(state->mode)); 94 state->enable = false; 95 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n", 96 crtc->base.id, crtc->name, state); 97 } 98 99 return 0; 100} 101EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc); 102 103/** 104 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC 105 * @state: the CRTC whose incoming state to update 106 * @blob: pointer to blob property to use for mode 107 * 108 * Set a mode (originating from a blob property) on the desired CRTC state. 109 * This function will take a reference on the blob property for the CRTC state, 110 * and release the reference held on the state's existing mode property, if any 111 * was set. 112 * 113 * RETURNS: 114 * Zero on success, error code on failure. Cannot return -EDEADLK. 115 */ 116int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, 117 struct drm_property_blob *blob) 118{ 119 struct drm_crtc *crtc = state->crtc; 120 121 if (blob == state->mode_blob) 122 return 0; 123 124 drm_property_blob_put(state->mode_blob); 125 state->mode_blob = NULL; 126 127 memset(&state->mode, 0, sizeof(state->mode)); 128 129 if (blob) { 130 int ret; 131 132 if (blob->length != sizeof(struct drm_mode_modeinfo)) { 133 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] bad mode blob length: %zu\n", 134 crtc->base.id, crtc->name, 135 blob->length); 136 return -EINVAL; 137 } 138 139 ret = drm_mode_convert_umode(crtc->dev, 140 &state->mode, blob->data); 141 if (ret) { 142 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n", 143 crtc->base.id, crtc->name, 144 ret, drm_get_mode_status_name(state->mode.status)); 145 drm_mode_debug_printmodeline(&state->mode); 146 return -EINVAL; 147 } 148 149 state->mode_blob = drm_property_blob_get(blob); 150 state->enable = true; 151 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 152 state->mode.name, crtc->base.id, crtc->name, 153 state); 154 } else { 155 state->enable = false; 156 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n", 157 crtc->base.id, crtc->name, state); 158 } 159 160 return 0; 161} 162EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); 163 164/** 165 * drm_atomic_set_crtc_for_plane - set CRTC for plane 166 * @plane_state: the plane whose incoming state to update 167 * @crtc: CRTC to use for the plane 168 * 169 * Changing the assigned CRTC for a plane requires us to grab the lock and state 170 * for the new CRTC, as needed. This function takes care of all these details 171 * besides updating the pointer in the state object itself. 172 * 173 * Returns: 174 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 175 * then the w/w mutex code has detected a deadlock and the entire atomic 176 * sequence must be restarted. All other errors are fatal. 177 */ 178int 179drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, 180 struct drm_crtc *crtc) 181{ 182 struct drm_plane *plane = plane_state->plane; 183 struct drm_crtc_state *crtc_state; 184 /* Nothing to do for same crtc*/ 185 if (plane_state->crtc == crtc) 186 return 0; 187 if (plane_state->crtc) { 188 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 189 plane_state->crtc); 190 if (WARN_ON(IS_ERR(crtc_state))) 191 return PTR_ERR(crtc_state); 192 193 crtc_state->plane_mask &= ~drm_plane_mask(plane); 194 } 195 196 plane_state->crtc = crtc; 197 198 if (crtc) { 199 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 200 crtc); 201 if (IS_ERR(crtc_state)) 202 return PTR_ERR(crtc_state); 203 crtc_state->plane_mask |= drm_plane_mask(plane); 204 } 205 206 if (crtc) 207 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n", 208 plane->base.id, plane->name, plane_state, 209 crtc->base.id, crtc->name); 210 else 211 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [NOCRTC]\n", 212 plane->base.id, plane->name, plane_state); 213 214 return 0; 215} 216EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane); 217 218/** 219 * drm_atomic_set_fb_for_plane - set framebuffer for plane 220 * @plane_state: atomic state object for the plane 221 * @fb: fb to use for the plane 222 * 223 * Changing the assigned framebuffer for a plane requires us to grab a reference 224 * to the new fb and drop the reference to the old fb, if there is one. This 225 * function takes care of all these details besides updating the pointer in the 226 * state object itself. 227 */ 228void 229drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, 230 struct drm_framebuffer *fb) 231{ 232 struct drm_plane *plane = plane_state->plane; 233 234 if (fb) 235 DRM_DEBUG_ATOMIC("Set [FB:%d] for [PLANE:%d:%s] state %p\n", 236 fb->base.id, plane->base.id, plane->name, 237 plane_state); 238 else 239 DRM_DEBUG_ATOMIC("Set [NOFB] for [PLANE:%d:%s] state %p\n", 240 plane->base.id, plane->name, plane_state); 241 242 drm_framebuffer_assign(&plane_state->fb, fb); 243} 244EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); 245 246/** 247 * drm_atomic_set_fence_for_plane - set fence for plane 248 * @plane_state: atomic state object for the plane 249 * @fence: dma_fence to use for the plane 250 * 251 * Helper to setup the plane_state fence in case it is not set yet. 252 * By using this drivers doesn't need to worry if the user choose 253 * implicit or explicit fencing. 254 * 255 * This function will not set the fence to the state if it was set 256 * via explicit fencing interfaces on the atomic ioctl. In that case it will 257 * drop the reference to the fence as we are not storing it anywhere. 258 * Otherwise, if &drm_plane_state.fence is not set this function we just set it 259 * with the received implicit fence. In both cases this function consumes a 260 * reference for @fence. 261 * 262 * This way explicit fencing can be used to overrule implicit fencing, which is 263 * important to make explicit fencing use-cases work: One example is using one 264 * buffer for 2 screens with different refresh rates. Implicit fencing will 265 * clamp rendering to the refresh rate of the slower screen, whereas explicit 266 * fence allows 2 independent render and display loops on a single buffer. If a 267 * driver allows obeys both implicit and explicit fences for plane updates, then 268 * it will break all the benefits of explicit fencing. 269 */ 270void 271drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state, 272 struct dma_fence *fence) 273{ 274 if (plane_state->fence) { 275 dma_fence_put(fence); 276 return; 277 } 278 279 plane_state->fence = fence; 280} 281EXPORT_SYMBOL(drm_atomic_set_fence_for_plane); 282 283/** 284 * drm_atomic_set_crtc_for_connector - set CRTC for connector 285 * @conn_state: atomic state object for the connector 286 * @crtc: CRTC to use for the connector 287 * 288 * Changing the assigned CRTC for a connector requires us to grab the lock and 289 * state for the new CRTC, as needed. This function takes care of all these 290 * details besides updating the pointer in the state object itself. 291 * 292 * Returns: 293 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 294 * then the w/w mutex code has detected a deadlock and the entire atomic 295 * sequence must be restarted. All other errors are fatal. 296 */ 297int 298drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, 299 struct drm_crtc *crtc) 300{ 301 struct drm_connector *connector = conn_state->connector; 302 struct drm_crtc_state *crtc_state; 303 304 if (conn_state->crtc == crtc) 305 return 0; 306 307 if (conn_state->crtc) { 308 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state, 309 conn_state->crtc); 310 311 crtc_state->connector_mask &= 312 ~drm_connector_mask(conn_state->connector); 313 314 drm_connector_put(conn_state->connector); 315 conn_state->crtc = NULL; 316 } 317 318 if (crtc) { 319 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); 320 if (IS_ERR(crtc_state)) 321 return PTR_ERR(crtc_state); 322 323 crtc_state->connector_mask |= 324 drm_connector_mask(conn_state->connector); 325 326 drm_connector_get(conn_state->connector); 327 conn_state->crtc = crtc; 328 329 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n", 330 connector->base.id, connector->name, 331 conn_state, crtc->base.id, crtc->name); 332 } else { 333 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n", 334 connector->base.id, connector->name, 335 conn_state); 336 } 337 338 return 0; 339} 340EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); 341 342static void set_out_fence_for_crtc(struct drm_atomic_state *state, 343 struct drm_crtc *crtc, s32 __user *fence_ptr) 344{ 345 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; 346} 347 348static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state, 349 struct drm_crtc *crtc) 350{ 351 s32 __user *fence_ptr; 352 353 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; 354 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; 355 356 return fence_ptr; 357} 358 359static int set_out_fence_for_connector(struct drm_atomic_state *state, 360 struct drm_connector *connector, 361 s32 __user *fence_ptr) 362{ 363 unsigned int index = drm_connector_index(connector); 364 365 if (!fence_ptr) 366 return 0; 367 368 if (put_user(-1, fence_ptr)) 369 return -EFAULT; 370 371 state->connectors[index].out_fence_ptr = fence_ptr; 372 373 return 0; 374} 375 376static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state, 377 struct drm_connector *connector) 378{ 379 unsigned int index = drm_connector_index(connector); 380 s32 __user *fence_ptr; 381 382 fence_ptr = state->connectors[index].out_fence_ptr; 383 state->connectors[index].out_fence_ptr = NULL; 384 385 return fence_ptr; 386} 387 388static int 389drm_atomic_replace_property_blob_from_id(struct drm_device *dev, 390 struct drm_property_blob **blob, 391 uint64_t blob_id, 392 ssize_t expected_size, 393 ssize_t expected_elem_size, 394 bool *replaced) 395{ 396 struct drm_property_blob *new_blob = NULL; 397 398 if (blob_id != 0) { 399 new_blob = drm_property_lookup_blob(dev, blob_id); 400 if (new_blob == NULL) 401 return -EINVAL; 402 403 if (expected_size > 0 && 404 new_blob->length != expected_size) { 405 drm_property_blob_put(new_blob); 406 return -EINVAL; 407 } 408 if (expected_elem_size > 0 && 409 new_blob->length % expected_elem_size != 0) { 410 drm_property_blob_put(new_blob); 411 return -EINVAL; 412 } 413 } 414 415 *replaced |= drm_property_replace_blob(blob, new_blob); 416 drm_property_blob_put(new_blob); 417 418 return 0; 419} 420 421static int drm_atomic_crtc_set_property(struct drm_crtc *crtc, 422 struct drm_crtc_state *state, struct drm_property *property, 423 uint64_t val) 424{ 425 struct drm_device *dev = crtc->dev; 426 struct drm_mode_config *config = &dev->mode_config; 427 bool replaced = false; 428 int ret; 429 430 if (property == config->prop_active) 431 state->active = val; 432 else if (property == config->prop_mode_id) { 433 struct drm_property_blob *mode = 434 drm_property_lookup_blob(dev, val); 435 ret = drm_atomic_set_mode_prop_for_crtc(state, mode); 436 drm_property_blob_put(mode); 437 return ret; 438 } else if (property == config->prop_vrr_enabled) { 439 state->vrr_enabled = val; 440 } else if (property == config->degamma_lut_property) { 441 ret = drm_atomic_replace_property_blob_from_id(dev, 442 &state->degamma_lut, 443 val, 444 -1, sizeof(struct drm_color_lut), 445 &replaced); 446 state->color_mgmt_changed |= replaced; 447 return ret; 448 } else if (property == config->ctm_property) { 449 ret = drm_atomic_replace_property_blob_from_id(dev, 450 &state->ctm, 451 val, 452 sizeof(struct drm_color_ctm), -1, 453 &replaced); 454 state->color_mgmt_changed |= replaced; 455 return ret; 456 } else if (property == config->gamma_lut_property) { 457 ret = drm_atomic_replace_property_blob_from_id(dev, 458 &state->gamma_lut, 459 val, 460 -1, sizeof(struct drm_color_lut), 461 &replaced); 462 state->color_mgmt_changed |= replaced; 463 return ret; 464 } else if (property == config->prop_out_fence_ptr) { 465 s32 __user *fence_ptr = u64_to_user_ptr(val); 466 467 if (!fence_ptr) 468 return 0; 469 470 if (put_user(-1, fence_ptr)) 471 return -EFAULT; 472 473 set_out_fence_for_crtc(state->state, crtc, fence_ptr); 474 } else if (crtc->funcs->atomic_set_property) { 475 return crtc->funcs->atomic_set_property(crtc, state, property, val); 476 } else { 477 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n", 478 crtc->base.id, crtc->name, 479 property->base.id, property->name); 480 return -EINVAL; 481 } 482 483 return 0; 484} 485 486static int 487drm_atomic_crtc_get_property(struct drm_crtc *crtc, 488 const struct drm_crtc_state *state, 489 struct drm_property *property, uint64_t *val) 490{ 491 struct drm_device *dev = crtc->dev; 492 struct drm_mode_config *config = &dev->mode_config; 493 494 if (property == config->prop_active) 495 *val = drm_atomic_crtc_effectively_active(state); 496 else if (property == config->prop_mode_id) 497 *val = (state->mode_blob) ? state->mode_blob->base.id : 0; 498 else if (property == config->prop_vrr_enabled) 499 *val = state->vrr_enabled; 500 else if (property == config->degamma_lut_property) 501 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; 502 else if (property == config->ctm_property) 503 *val = (state->ctm) ? state->ctm->base.id : 0; 504 else if (property == config->gamma_lut_property) 505 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; 506 else if (property == config->prop_out_fence_ptr) 507 *val = 0; 508 else if (crtc->funcs->atomic_get_property) 509 return crtc->funcs->atomic_get_property(crtc, state, property, val); 510 else 511 return -EINVAL; 512 513 return 0; 514} 515 516static int drm_atomic_plane_set_property(struct drm_plane *plane, 517 struct drm_plane_state *state, struct drm_file *file_priv, 518 struct drm_property *property, uint64_t val) 519{ 520 struct drm_device *dev = plane->dev; 521 struct drm_mode_config *config = &dev->mode_config; 522 bool replaced = false; 523 int ret; 524 525 if (property == config->prop_fb_id) { 526 struct drm_framebuffer *fb; 527 528 fb = drm_framebuffer_lookup(dev, file_priv, val); 529 drm_atomic_set_fb_for_plane(state, fb); 530 if (fb) 531 drm_framebuffer_put(fb); 532 } else if (property == config->prop_in_fence_fd) { 533 if (state->fence) 534 return -EINVAL; 535 536 if (U642I64(val) == -1) 537 return 0; 538 539 state->fence = sync_file_get_fence(val); 540 if (!state->fence) 541 return -EINVAL; 542 543 } else if (property == config->prop_crtc_id) { 544 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 545 546 if (val && !crtc) 547 return -EACCES; 548 return drm_atomic_set_crtc_for_plane(state, crtc); 549 } else if (property == config->prop_crtc_x) { 550 state->crtc_x = U642I64(val); 551 } else if (property == config->prop_crtc_y) { 552 state->crtc_y = U642I64(val); 553 } else if (property == config->prop_crtc_w) { 554 state->crtc_w = val; 555 } else if (property == config->prop_crtc_h) { 556 state->crtc_h = val; 557 } else if (property == config->prop_src_x) { 558 state->src_x = val; 559 } else if (property == config->prop_src_y) { 560 state->src_y = val; 561 } else if (property == config->prop_src_w) { 562 state->src_w = val; 563 } else if (property == config->prop_src_h) { 564 state->src_h = val; 565 } else if (property == plane->alpha_property) { 566 state->alpha = val; 567 } else if (property == plane->blend_mode_property) { 568 state->pixel_blend_mode = val; 569 } else if (property == plane->rotation_property) { 570 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) { 571 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n", 572 plane->base.id, plane->name, val); 573 return -EINVAL; 574 } 575 state->rotation = val; 576 } else if (property == plane->zpos_property) { 577 state->zpos = val; 578 } else if (property == plane->color_encoding_property) { 579 state->color_encoding = val; 580 } else if (property == plane->color_range_property) { 581 state->color_range = val; 582 } else if (property == config->prop_fb_damage_clips) { 583 ret = drm_atomic_replace_property_blob_from_id(dev, 584 &state->fb_damage_clips, 585 val, 586 -1, 587 sizeof(struct drm_rect), 588 &replaced); 589 return ret; 590 } else if (plane->funcs->atomic_set_property) { 591 return plane->funcs->atomic_set_property(plane, state, 592 property, val); 593 } else { 594 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n", 595 plane->base.id, plane->name, 596 property->base.id, property->name); 597 return -EINVAL; 598 } 599 600 return 0; 601} 602 603static int 604drm_atomic_plane_get_property(struct drm_plane *plane, 605 const struct drm_plane_state *state, 606 struct drm_property *property, uint64_t *val) 607{ 608 struct drm_device *dev = plane->dev; 609 struct drm_mode_config *config = &dev->mode_config; 610 611 if (property == config->prop_fb_id) { 612 *val = (state->fb) ? state->fb->base.id : 0; 613 } else if (property == config->prop_in_fence_fd) { 614 *val = -1; 615 } else if (property == config->prop_crtc_id) { 616 *val = (state->crtc) ? state->crtc->base.id : 0; 617 } else if (property == config->prop_crtc_x) { 618 *val = I642U64(state->crtc_x); 619 } else if (property == config->prop_crtc_y) { 620 *val = I642U64(state->crtc_y); 621 } else if (property == config->prop_crtc_w) { 622 *val = state->crtc_w; 623 } else if (property == config->prop_crtc_h) { 624 *val = state->crtc_h; 625 } else if (property == config->prop_src_x) { 626 *val = state->src_x; 627 } else if (property == config->prop_src_y) { 628 *val = state->src_y; 629 } else if (property == config->prop_src_w) { 630 *val = state->src_w; 631 } else if (property == config->prop_src_h) { 632 *val = state->src_h; 633 } else if (property == plane->alpha_property) { 634 *val = state->alpha; 635 } else if (property == plane->blend_mode_property) { 636 *val = state->pixel_blend_mode; 637 } else if (property == plane->rotation_property) { 638 *val = state->rotation; 639 } else if (property == plane->zpos_property) { 640 *val = state->zpos; 641 } else if (property == plane->color_encoding_property) { 642 *val = state->color_encoding; 643 } else if (property == plane->color_range_property) { 644 *val = state->color_range; 645 } else if (property == config->prop_fb_damage_clips) { 646 *val = (state->fb_damage_clips) ? 647 state->fb_damage_clips->base.id : 0; 648 } else if (plane->funcs->atomic_get_property) { 649 return plane->funcs->atomic_get_property(plane, state, property, val); 650 } else { 651 return -EINVAL; 652 } 653 654 return 0; 655} 656 657static int drm_atomic_set_writeback_fb_for_connector( 658 struct drm_connector_state *conn_state, 659 struct drm_framebuffer *fb) 660{ 661 int ret; 662 663 ret = drm_writeback_set_fb(conn_state, fb); 664 if (ret < 0) 665 return ret; 666 667 if (fb) 668 DRM_DEBUG_ATOMIC("Set [FB:%d] for connector state %p\n", 669 fb->base.id, conn_state); 670 else 671 DRM_DEBUG_ATOMIC("Set [NOFB] for connector state %p\n", 672 conn_state); 673 674 return 0; 675} 676 677static int drm_atomic_connector_set_property(struct drm_connector *connector, 678 struct drm_connector_state *state, struct drm_file *file_priv, 679 struct drm_property *property, uint64_t val) 680{ 681 struct drm_device *dev = connector->dev; 682 struct drm_mode_config *config = &dev->mode_config; 683 bool replaced = false; 684 int ret; 685 686 if (property == config->prop_crtc_id) { 687 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 688 689 if (val && !crtc) 690 return -EACCES; 691 return drm_atomic_set_crtc_for_connector(state, crtc); 692 } else if (property == config->dpms_property) { 693 /* setting DPMS property requires special handling, which 694 * is done in legacy setprop path for us. Disallow (for 695 * now?) atomic writes to DPMS property: 696 */ 697 return -EINVAL; 698 } else if (property == config->tv_select_subconnector_property) { 699 state->tv.subconnector = val; 700 } else if (property == config->tv_left_margin_property) { 701 state->tv.margins.left = val; 702 } else if (property == config->tv_right_margin_property) { 703 state->tv.margins.right = val; 704 } else if (property == config->tv_top_margin_property) { 705 state->tv.margins.top = val; 706 } else if (property == config->tv_bottom_margin_property) { 707 state->tv.margins.bottom = val; 708 } else if (property == config->tv_mode_property) { 709 state->tv.mode = val; 710 } else if (property == config->tv_brightness_property) { 711 state->tv.brightness = val; 712 } else if (property == config->tv_contrast_property) { 713 state->tv.contrast = val; 714 } else if (property == config->tv_flicker_reduction_property) { 715 state->tv.flicker_reduction = val; 716 } else if (property == config->tv_overscan_property) { 717 state->tv.overscan = val; 718 } else if (property == config->tv_saturation_property) { 719 state->tv.saturation = val; 720 } else if (property == config->tv_hue_property) { 721 state->tv.hue = val; 722 } else if (property == config->link_status_property) { 723 /* Never downgrade from GOOD to BAD on userspace's request here, 724 * only hw issues can do that. 725 * 726 * For an atomic property the userspace doesn't need to be able 727 * to understand all the properties, but needs to be able to 728 * restore the state it wants on VT switch. So if the userspace 729 * tries to change the link_status from GOOD to BAD, driver 730 * silently rejects it and returns a 0. This prevents userspace 731 * from accidently breaking the display when it restores the 732 * state. 733 */ 734 if (state->link_status != DRM_LINK_STATUS_GOOD) 735 state->link_status = val; 736 } else if (property == config->hdr_output_metadata_property) { 737 ret = drm_atomic_replace_property_blob_from_id(dev, 738 &state->hdr_output_metadata, 739 val, 740 sizeof(struct hdr_output_metadata), -1, 741 &replaced); 742 return ret; 743 } else if (property == config->aspect_ratio_property) { 744 state->picture_aspect_ratio = val; 745 } else if (property == config->content_type_property) { 746 state->content_type = val; 747 } else if (property == connector->scaling_mode_property) { 748 state->scaling_mode = val; 749 } else if (property == config->content_protection_property) { 750 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) { 751 DRM_DEBUG_KMS("only drivers can set CP Enabled\n"); 752 return -EINVAL; 753 } 754 state->content_protection = val; 755 } else if (property == config->hdcp_content_type_property) { 756 state->hdcp_content_type = val; 757 } else if (property == connector->colorspace_property) { 758 state->colorspace = val; 759 } else if (property == config->writeback_fb_id_property) { 760 struct drm_framebuffer *fb; 761 int ret; 762 763 fb = drm_framebuffer_lookup(dev, file_priv, val); 764 ret = drm_atomic_set_writeback_fb_for_connector(state, fb); 765 if (fb) 766 drm_framebuffer_put(fb); 767 return ret; 768 } else if (property == config->writeback_out_fence_ptr_property) { 769 s32 __user *fence_ptr = u64_to_user_ptr(val); 770 771 return set_out_fence_for_connector(state->state, connector, 772 fence_ptr); 773 } else if (property == connector->max_bpc_property) { 774 state->max_requested_bpc = val; 775 } else if (connector->funcs->atomic_set_property) { 776 return connector->funcs->atomic_set_property(connector, 777 state, property, val); 778 } else { 779 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n", 780 connector->base.id, connector->name, 781 property->base.id, property->name); 782 return -EINVAL; 783 } 784 785 return 0; 786} 787 788static int 789drm_atomic_connector_get_property(struct drm_connector *connector, 790 const struct drm_connector_state *state, 791 struct drm_property *property, uint64_t *val) 792{ 793 struct drm_device *dev = connector->dev; 794 struct drm_mode_config *config = &dev->mode_config; 795 796 if (property == config->prop_crtc_id) { 797 *val = (state->crtc) ? state->crtc->base.id : 0; 798 } else if (property == config->dpms_property) { 799 if (state->crtc && state->crtc->state->self_refresh_active) 800 *val = DRM_MODE_DPMS_ON; 801 else 802 *val = connector->dpms; 803 } else if (property == config->tv_select_subconnector_property) { 804 *val = state->tv.subconnector; 805 } else if (property == config->tv_left_margin_property) { 806 *val = state->tv.margins.left; 807 } else if (property == config->tv_right_margin_property) { 808 *val = state->tv.margins.right; 809 } else if (property == config->tv_top_margin_property) { 810 *val = state->tv.margins.top; 811 } else if (property == config->tv_bottom_margin_property) { 812 *val = state->tv.margins.bottom; 813 } else if (property == config->tv_mode_property) { 814 *val = state->tv.mode; 815 } else if (property == config->tv_brightness_property) { 816 *val = state->tv.brightness; 817 } else if (property == config->tv_contrast_property) { 818 *val = state->tv.contrast; 819 } else if (property == config->tv_flicker_reduction_property) { 820 *val = state->tv.flicker_reduction; 821 } else if (property == config->tv_overscan_property) { 822 *val = state->tv.overscan; 823 } else if (property == config->tv_saturation_property) { 824 *val = state->tv.saturation; 825 } else if (property == config->tv_hue_property) { 826 *val = state->tv.hue; 827 } else if (property == config->link_status_property) { 828 *val = state->link_status; 829 } else if (property == config->aspect_ratio_property) { 830 *val = state->picture_aspect_ratio; 831 } else if (property == config->content_type_property) { 832 *val = state->content_type; 833 } else if (property == connector->colorspace_property) { 834 *val = state->colorspace; 835 } else if (property == connector->scaling_mode_property) { 836 *val = state->scaling_mode; 837 } else if (property == config->hdr_output_metadata_property) { 838 *val = state->hdr_output_metadata ? 839 state->hdr_output_metadata->base.id : 0; 840 } else if (property == config->content_protection_property) { 841 *val = state->content_protection; 842 } else if (property == config->hdcp_content_type_property) { 843 *val = state->hdcp_content_type; 844 } else if (property == config->writeback_fb_id_property) { 845 /* Writeback framebuffer is one-shot, write and forget */ 846 *val = 0; 847 } else if (property == config->writeback_out_fence_ptr_property) { 848 *val = 0; 849 } else if (property == connector->max_bpc_property) { 850 *val = state->max_requested_bpc; 851 } else if (connector->funcs->atomic_get_property) { 852 return connector->funcs->atomic_get_property(connector, 853 state, property, val); 854 } else { 855 return -EINVAL; 856 } 857 858 return 0; 859} 860 861int drm_atomic_get_property(struct drm_mode_object *obj, 862 struct drm_property *property, uint64_t *val) 863{ 864 struct drm_device *dev = property->dev; 865 int ret; 866 867 switch (obj->type) { 868 case DRM_MODE_OBJECT_CONNECTOR: { 869 struct drm_connector *connector = obj_to_connector(obj); 870 871 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 872 ret = drm_atomic_connector_get_property(connector, 873 connector->state, property, val); 874 break; 875 } 876 case DRM_MODE_OBJECT_CRTC: { 877 struct drm_crtc *crtc = obj_to_crtc(obj); 878 879 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 880 ret = drm_atomic_crtc_get_property(crtc, 881 crtc->state, property, val); 882 break; 883 } 884 case DRM_MODE_OBJECT_PLANE: { 885 struct drm_plane *plane = obj_to_plane(obj); 886 887 WARN_ON(!drm_modeset_is_locked(&plane->mutex)); 888 ret = drm_atomic_plane_get_property(plane, 889 plane->state, property, val); 890 break; 891 } 892 default: 893 ret = -EINVAL; 894 break; 895 } 896 897 return ret; 898} 899 900/* 901 * The big monster ioctl 902 */ 903 904static struct drm_pending_vblank_event *create_vblank_event( 905 struct drm_crtc *crtc, uint64_t user_data) 906{ 907 struct drm_pending_vblank_event *e = NULL; 908 909 e = kzalloc(sizeof *e, GFP_KERNEL); 910 if (!e) 911 return NULL; 912 913 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 914 e->event.base.length = sizeof(e->event); 915 e->event.vbl.crtc_id = crtc->base.id; 916 e->event.vbl.user_data = user_data; 917 918 return e; 919} 920 921int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state, 922 struct drm_connector *connector, 923 int mode) 924{ 925 struct drm_connector *tmp_connector; 926 struct drm_connector_state *new_conn_state; 927 struct drm_crtc *crtc; 928 struct drm_crtc_state *crtc_state; 929 int i, ret, old_mode = connector->dpms; 930 bool active = false; 931 932 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, 933 state->acquire_ctx); 934 if (ret) 935 return ret; 936 937 if (mode != DRM_MODE_DPMS_ON) 938 mode = DRM_MODE_DPMS_OFF; 939 connector->dpms = mode; 940 941 crtc = connector->state->crtc; 942 if (!crtc) 943 goto out; 944 ret = drm_atomic_add_affected_connectors(state, crtc); 945 if (ret) 946 goto out; 947 948 crtc_state = drm_atomic_get_crtc_state(state, crtc); 949 if (IS_ERR(crtc_state)) { 950 ret = PTR_ERR(crtc_state); 951 goto out; 952 } 953 954 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) { 955 if (new_conn_state->crtc != crtc) 956 continue; 957 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { 958 active = true; 959 break; 960 } 961 } 962 963 crtc_state->active = active; 964 ret = drm_atomic_commit(state); 965out: 966 if (ret != 0) 967 connector->dpms = old_mode; 968 return ret; 969} 970 971int drm_atomic_set_property(struct drm_atomic_state *state, 972 struct drm_file *file_priv, 973 struct drm_mode_object *obj, 974 struct drm_property *prop, 975 uint64_t prop_value) 976{ 977 struct drm_mode_object *ref; 978 int ret; 979 980 if (!drm_property_change_valid_get(prop, prop_value, &ref)) 981 return -EINVAL; 982 983 switch (obj->type) { 984 case DRM_MODE_OBJECT_CONNECTOR: { 985 struct drm_connector *connector = obj_to_connector(obj); 986 struct drm_connector_state *connector_state; 987 988 connector_state = drm_atomic_get_connector_state(state, connector); 989 if (IS_ERR(connector_state)) { 990 ret = PTR_ERR(connector_state); 991 break; 992 } 993 994 ret = drm_atomic_connector_set_property(connector, 995 connector_state, file_priv, 996 prop, prop_value); 997 break; 998 } 999 case DRM_MODE_OBJECT_CRTC: { 1000 struct drm_crtc *crtc = obj_to_crtc(obj); 1001 struct drm_crtc_state *crtc_state; 1002 1003 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1004 if (IS_ERR(crtc_state)) { 1005 ret = PTR_ERR(crtc_state); 1006 break; 1007 } 1008 1009 ret = drm_atomic_crtc_set_property(crtc, 1010 crtc_state, prop, prop_value); 1011 break; 1012 } 1013 case DRM_MODE_OBJECT_PLANE: { 1014 struct drm_plane *plane = obj_to_plane(obj); 1015 struct drm_plane_state *plane_state; 1016 1017 plane_state = drm_atomic_get_plane_state(state, plane); 1018 if (IS_ERR(plane_state)) { 1019 ret = PTR_ERR(plane_state); 1020 break; 1021 } 1022 1023 ret = drm_atomic_plane_set_property(plane, 1024 plane_state, file_priv, 1025 prop, prop_value); 1026 break; 1027 } 1028 default: 1029 ret = -EINVAL; 1030 break; 1031 } 1032 1033 drm_property_change_valid_put(prop, ref); 1034 return ret; 1035} 1036 1037/** 1038 * DOC: explicit fencing properties 1039 * 1040 * Explicit fencing allows userspace to control the buffer synchronization 1041 * between devices. A Fence or a group of fences are transfered to/from 1042 * userspace using Sync File fds and there are two DRM properties for that. 1043 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and 1044 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. 1045 * 1046 * As a contrast, with implicit fencing the kernel keeps track of any 1047 * ongoing rendering, and automatically ensures that the atomic update waits 1048 * for any pending rendering to complete. For shared buffers represented with 1049 * a &struct dma_buf this is tracked in &struct dma_resv. 1050 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org), 1051 * whereas explicit fencing is what Android wants. 1052 * 1053 * "IN_FENCE_FD”: 1054 * Use this property to pass a fence that DRM should wait on before 1055 * proceeding with the Atomic Commit request and show the framebuffer for 1056 * the plane on the screen. The fence can be either a normal fence or a 1057 * merged one, the sync_file framework will handle both cases and use a 1058 * fence_array if a merged fence is received. Passing -1 here means no 1059 * fences to wait on. 1060 * 1061 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag 1062 * it will only check if the Sync File is a valid one. 1063 * 1064 * On the driver side the fence is stored on the @fence parameter of 1065 * &struct drm_plane_state. Drivers which also support implicit fencing 1066 * should set the implicit fence using drm_atomic_set_fence_for_plane(), 1067 * to make sure there's consistent behaviour between drivers in precedence 1068 * of implicit vs. explicit fencing. 1069 * 1070 * "OUT_FENCE_PTR”: 1071 * Use this property to pass a file descriptor pointer to DRM. Once the 1072 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with 1073 * the file descriptor number of a Sync File. This Sync File contains the 1074 * CRTC fence that will be signaled when all framebuffers present on the 1075 * Atomic Commit * request for that given CRTC are scanned out on the 1076 * screen. 1077 * 1078 * The Atomic Commit request fails if a invalid pointer is passed. If the 1079 * Atomic Commit request fails for any other reason the out fence fd 1080 * returned will be -1. On a Atomic Commit with the 1081 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. 1082 * 1083 * Note that out-fences don't have a special interface to drivers and are 1084 * internally represented by a &struct drm_pending_vblank_event in struct 1085 * &drm_crtc_state, which is also used by the nonblocking atomic commit 1086 * helpers and for the DRM event handling for existing userspace. 1087 */ 1088 1089struct drm_out_fence_state { 1090 s32 __user *out_fence_ptr; 1091 struct sync_file *sync_file; 1092 int fd; 1093}; 1094 1095static int setup_out_fence(struct drm_out_fence_state *fence_state, 1096 struct dma_fence *fence) 1097{ 1098 fence_state->fd = get_unused_fd_flags(O_CLOEXEC); 1099 if (fence_state->fd < 0) 1100 return fence_state->fd; 1101 1102 if (put_user(fence_state->fd, fence_state->out_fence_ptr)) 1103 return -EFAULT; 1104 1105 fence_state->sync_file = sync_file_create(fence); 1106 if (!fence_state->sync_file) 1107 return -ENOMEM; 1108 1109 return 0; 1110} 1111 1112static int prepare_signaling(struct drm_device *dev, 1113 struct drm_atomic_state *state, 1114 struct drm_mode_atomic *arg, 1115 struct drm_file *file_priv, 1116 struct drm_out_fence_state **fence_state, 1117 unsigned int *num_fences) 1118{ 1119 struct drm_crtc *crtc; 1120 struct drm_crtc_state *crtc_state; 1121 struct drm_connector *conn; 1122 struct drm_connector_state *conn_state; 1123 int i, c = 0, ret; 1124 1125 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) 1126 return 0; 1127 1128 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1129 s32 __user *fence_ptr; 1130 1131 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); 1132 1133 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { 1134 struct drm_pending_vblank_event *e; 1135 1136 e = create_vblank_event(crtc, arg->user_data); 1137 if (!e) 1138 return -ENOMEM; 1139 1140 crtc_state->event = e; 1141 } 1142 1143 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { 1144 struct drm_pending_vblank_event *e = crtc_state->event; 1145 1146 if (!file_priv) 1147 continue; 1148 1149 ret = drm_event_reserve_init(dev, file_priv, &e->base, 1150 &e->event.base); 1151 if (ret) { 1152 kfree(e); 1153 crtc_state->event = NULL; 1154 return ret; 1155 } 1156 } 1157 1158 if (fence_ptr) { 1159 struct dma_fence *fence; 1160 struct drm_out_fence_state *f; 1161 1162 f = krealloc(*fence_state, sizeof(**fence_state) * 1163 (*num_fences + 1), GFP_KERNEL); 1164 if (!f) 1165 return -ENOMEM; 1166 1167 memset(&f[*num_fences], 0, sizeof(*f)); 1168 1169 f[*num_fences].out_fence_ptr = fence_ptr; 1170 *fence_state = f; 1171 1172 fence = drm_crtc_create_fence(crtc); 1173 if (!fence) 1174 return -ENOMEM; 1175 1176 ret = setup_out_fence(&f[(*num_fences)++], fence); 1177 if (ret) { 1178 dma_fence_put(fence); 1179 return ret; 1180 } 1181 1182 crtc_state->event->base.fence = fence; 1183 } 1184 1185 c++; 1186 } 1187 1188 for_each_new_connector_in_state(state, conn, conn_state, i) { 1189 struct drm_writeback_connector *wb_conn; 1190 struct drm_out_fence_state *f; 1191 struct dma_fence *fence; 1192 s32 __user *fence_ptr; 1193 1194 if (!conn_state->writeback_job) 1195 continue; 1196 1197 fence_ptr = get_out_fence_for_connector(state, conn); 1198 if (!fence_ptr) 1199 continue; 1200 1201 f = krealloc(*fence_state, sizeof(**fence_state) * 1202 (*num_fences + 1), GFP_KERNEL); 1203 if (!f) 1204 return -ENOMEM; 1205 1206 memset(&f[*num_fences], 0, sizeof(*f)); 1207 1208 f[*num_fences].out_fence_ptr = fence_ptr; 1209 *fence_state = f; 1210 1211 wb_conn = drm_connector_to_writeback(conn); 1212 fence = drm_writeback_get_out_fence(wb_conn); 1213 if (!fence) 1214 return -ENOMEM; 1215 1216 ret = setup_out_fence(&f[(*num_fences)++], fence); 1217 if (ret) { 1218 dma_fence_put(fence); 1219 return ret; 1220 } 1221 1222 conn_state->writeback_job->out_fence = fence; 1223 } 1224 1225 /* 1226 * Having this flag means user mode pends on event which will never 1227 * reach due to lack of at least one CRTC for signaling 1228 */ 1229 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) 1230 return -EINVAL; 1231 1232 return 0; 1233} 1234 1235static void complete_signaling(struct drm_device *dev, 1236 struct drm_atomic_state *state, 1237 struct drm_out_fence_state *fence_state, 1238 unsigned int num_fences, 1239 bool install_fds) 1240{ 1241 struct drm_crtc *crtc; 1242 struct drm_crtc_state *crtc_state; 1243 int i; 1244 1245 if (install_fds) { 1246 for (i = 0; i < num_fences; i++) 1247 fd_install(fence_state[i].fd, 1248 fence_state[i].sync_file->file); 1249 1250 kfree(fence_state); 1251 return; 1252 } 1253 1254 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1255 struct drm_pending_vblank_event *event = crtc_state->event; 1256 /* 1257 * Free the allocated event. drm_atomic_helper_setup_commit 1258 * can allocate an event too, so only free it if it's ours 1259 * to prevent a double free in drm_atomic_state_clear. 1260 */ 1261 if (event && (event->base.fence || event->base.file_priv)) { 1262 drm_event_cancel_free(dev, &event->base); 1263 crtc_state->event = NULL; 1264 } 1265 } 1266 1267 if (!fence_state) 1268 return; 1269 1270 for (i = 0; i < num_fences; i++) { 1271 if (fence_state[i].sync_file) 1272 fput(fence_state[i].sync_file->file); 1273 if (fence_state[i].fd >= 0) 1274 put_unused_fd(fence_state[i].fd); 1275 1276 /* If this fails log error to the user */ 1277 if (fence_state[i].out_fence_ptr && 1278 put_user(-1, fence_state[i].out_fence_ptr)) 1279 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n"); 1280 } 1281 1282 kfree(fence_state); 1283} 1284 1285int drm_mode_atomic_ioctl(struct drm_device *dev, 1286 void *data, struct drm_file *file_priv) 1287{ 1288 struct drm_mode_atomic *arg = data; 1289 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); 1290 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); 1291 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 1292 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); 1293 unsigned int copied_objs, copied_props; 1294 struct drm_atomic_state *state; 1295 struct drm_modeset_acquire_ctx ctx; 1296 struct drm_out_fence_state *fence_state; 1297 int ret = 0; 1298 unsigned int i, j, num_fences; 1299 1300 /* disallow for drivers not supporting atomic: */ 1301 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 1302 return -EOPNOTSUPP; 1303 1304 /* disallow for userspace that has not enabled atomic cap (even 1305 * though this may be a bit overkill, since legacy userspace 1306 * wouldn't know how to call this ioctl) 1307 */ 1308 if (!file_priv->atomic) 1309 return -EINVAL; 1310 1311 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) 1312 return -EINVAL; 1313 1314 if (arg->reserved) 1315 return -EINVAL; 1316 1317 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) 1318 return -EINVAL; 1319 1320 /* can't test and expect an event at the same time. */ 1321 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && 1322 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) 1323 return -EINVAL; 1324 1325 state = drm_atomic_state_alloc(dev); 1326 if (!state) 1327 return -ENOMEM; 1328 1329 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); 1330 state->acquire_ctx = &ctx; 1331 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); 1332 1333retry: 1334 copied_objs = 0; 1335 copied_props = 0; 1336 fence_state = NULL; 1337 num_fences = 0; 1338 1339 for (i = 0; i < arg->count_objs; i++) { 1340 uint32_t obj_id, count_props; 1341 struct drm_mode_object *obj; 1342 1343 if (get_user(obj_id, objs_ptr + copied_objs)) { 1344 ret = -EFAULT; 1345 goto out; 1346 } 1347 1348 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY); 1349 if (!obj) { 1350 ret = -ENOENT; 1351 goto out; 1352 } 1353 1354 if (!obj->properties) { 1355 drm_mode_object_put(obj); 1356 ret = -ENOENT; 1357 goto out; 1358 } 1359 1360 if (get_user(count_props, count_props_ptr + copied_objs)) { 1361 drm_mode_object_put(obj); 1362 ret = -EFAULT; 1363 goto out; 1364 } 1365 1366 copied_objs++; 1367 1368 for (j = 0; j < count_props; j++) { 1369 uint32_t prop_id; 1370 uint64_t prop_value; 1371 struct drm_property *prop; 1372 1373 if (get_user(prop_id, props_ptr + copied_props)) { 1374 drm_mode_object_put(obj); 1375 ret = -EFAULT; 1376 goto out; 1377 } 1378 1379 prop = drm_mode_obj_find_prop_id(obj, prop_id); 1380 if (!prop) { 1381 drm_mode_object_put(obj); 1382 ret = -ENOENT; 1383 goto out; 1384 } 1385 1386 if (copy_from_user(&prop_value, 1387 prop_values_ptr + copied_props, 1388 sizeof(prop_value))) { 1389 drm_mode_object_put(obj); 1390 ret = -EFAULT; 1391 goto out; 1392 } 1393 1394 ret = drm_atomic_set_property(state, file_priv, 1395 obj, prop, prop_value); 1396 if (ret) { 1397 drm_mode_object_put(obj); 1398 goto out; 1399 } 1400 1401 copied_props++; 1402 } 1403 1404 drm_mode_object_put(obj); 1405 } 1406 1407 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, 1408 &num_fences); 1409 if (ret) 1410 goto out; 1411 1412 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { 1413 ret = drm_atomic_check_only(state); 1414 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { 1415 ret = drm_atomic_nonblocking_commit(state); 1416 } else { 1417 if (drm_debug_enabled(DRM_UT_STATE)) 1418 drm_atomic_print_state(state); 1419 1420 ret = drm_atomic_commit(state); 1421 } 1422 1423out: 1424 complete_signaling(dev, state, fence_state, num_fences, !ret); 1425 1426 if (ret == -EDEADLK) { 1427 drm_atomic_state_clear(state); 1428 ret = drm_modeset_backoff(&ctx); 1429 if (!ret) 1430 goto retry; 1431 } 1432 1433 drm_atomic_state_put(state); 1434 1435 drm_modeset_drop_locks(&ctx); 1436 drm_modeset_acquire_fini(&ctx); 1437 1438 return ret; 1439} 1440