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