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_file *file_priv, 516 struct drm_property *property, 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; 525 fb = drm_framebuffer_lookup(dev, file_priv, val); 526 drm_atomic_set_fb_for_plane(state, fb); 527 if (fb) 528 drm_framebuffer_put(fb); 529 } else if (property == config->prop_in_fence_fd) { 530 if (state->fence) 531 return -EINVAL; 532 533 if (U642I64(val) == -1) 534 return 0; 535 536 state->fence = sync_file_get_fence(val); 537 if (!state->fence) 538 return -EINVAL; 539 540 } else if (property == config->prop_crtc_id) { 541 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 542 if (val && !crtc) 543 return -EACCES; 544 return drm_atomic_set_crtc_for_plane(state, crtc); 545 } else if (property == config->prop_crtc_x) { 546 state->crtc_x = U642I64(val); 547 } else if (property == config->prop_crtc_y) { 548 state->crtc_y = U642I64(val); 549 } else if (property == config->prop_crtc_w) { 550 state->crtc_w = val; 551 } else if (property == config->prop_crtc_h) { 552 state->crtc_h = val; 553 } else if (property == config->prop_src_x) { 554 state->src_x = val; 555 } else if (property == config->prop_src_y) { 556 state->src_y = val; 557 } else if (property == config->prop_src_w) { 558 state->src_w = val; 559 } else if (property == config->prop_src_h) { 560 state->src_h = val; 561 } else if (property == plane->alpha_property) { 562 state->alpha = val; 563 } else if (property == plane->blend_mode_property) { 564 state->pixel_blend_mode = val; 565 } else if (property == plane->rotation_property) { 566 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) { 567 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n", 568 plane->base.id, plane->name, val); 569 return -EINVAL; 570 } 571 state->rotation = val; 572 } else if (property == plane->zpos_property) { 573 state->zpos = val; 574 } else if (property == plane->color_encoding_property) { 575 state->color_encoding = val; 576 } else if (property == plane->color_range_property) { 577 state->color_range = val; 578 } else if (property == config->prop_fb_damage_clips) { 579 ret = drm_atomic_replace_property_blob_from_id(dev, 580 &state->fb_damage_clips, 581 val, 582 -1, 583 sizeof(struct drm_rect), 584 &replaced); 585 return ret; 586 } else if (plane->funcs->atomic_set_property) { 587 return plane->funcs->atomic_set_property(plane, state, 588 property, val); 589 } else { 590 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n", 591 plane->base.id, plane->name, 592 property->base.id, property->name); 593 return -EINVAL; 594 } 595 596 return 0; 597 } 598 599 static int 600 drm_atomic_plane_get_property(struct drm_plane *plane, 601 const struct drm_plane_state *state, 602 struct drm_property *property, uint64_t *val) 603 { 604 struct drm_device *dev = plane->dev; 605 struct drm_mode_config *config = &dev->mode_config; 606 607 if (property == config->prop_fb_id) { 608 *val = (state->fb) ? state->fb->base.id : 0; 609 } else if (property == config->prop_in_fence_fd) { 610 *val = -1; 611 } else if (property == config->prop_crtc_id) { 612 *val = (state->crtc) ? state->crtc->base.id : 0; 613 } else if (property == config->prop_crtc_x) { 614 *val = I642U64(state->crtc_x); 615 } else if (property == config->prop_crtc_y) { 616 *val = I642U64(state->crtc_y); 617 } else if (property == config->prop_crtc_w) { 618 *val = state->crtc_w; 619 } else if (property == config->prop_crtc_h) { 620 *val = state->crtc_h; 621 } else if (property == config->prop_src_x) { 622 *val = state->src_x; 623 } else if (property == config->prop_src_y) { 624 *val = state->src_y; 625 } else if (property == config->prop_src_w) { 626 *val = state->src_w; 627 } else if (property == config->prop_src_h) { 628 *val = state->src_h; 629 } else if (property == plane->alpha_property) { 630 *val = state->alpha; 631 } else if (property == plane->blend_mode_property) { 632 *val = state->pixel_blend_mode; 633 } else if (property == plane->rotation_property) { 634 *val = state->rotation; 635 } else if (property == plane->zpos_property) { 636 *val = state->zpos; 637 } else if (property == plane->color_encoding_property) { 638 *val = state->color_encoding; 639 } else if (property == plane->color_range_property) { 640 *val = state->color_range; 641 } else if (property == config->prop_fb_damage_clips) { 642 *val = (state->fb_damage_clips) ? 643 state->fb_damage_clips->base.id : 0; 644 } else if (plane->funcs->atomic_get_property) { 645 return plane->funcs->atomic_get_property(plane, state, property, val); 646 } else { 647 return -EINVAL; 648 } 649 650 return 0; 651 } 652 653 static int drm_atomic_set_writeback_fb_for_connector( 654 struct drm_connector_state *conn_state, 655 struct drm_framebuffer *fb) 656 { 657 int ret; 658 659 ret = drm_writeback_set_fb(conn_state, fb); 660 if (ret < 0) 661 return ret; 662 663 if (fb) 664 DRM_DEBUG_ATOMIC("Set [FB:%d] for connector state %p\n", 665 fb->base.id, conn_state); 666 else 667 DRM_DEBUG_ATOMIC("Set [NOFB] for connector state %p\n", 668 conn_state); 669 670 return 0; 671 } 672 673 static int drm_atomic_connector_set_property(struct drm_connector *connector, 674 struct drm_connector_state *state, struct drm_file *file_priv, 675 struct drm_property *property, uint64_t val) 676 { 677 struct drm_device *dev = connector->dev; 678 struct drm_mode_config *config = &dev->mode_config; 679 bool replaced = false; 680 int ret; 681 682 if (property == config->prop_crtc_id) { 683 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 684 if (val && !crtc) 685 return -EACCES; 686 return drm_atomic_set_crtc_for_connector(state, crtc); 687 } else if (property == config->dpms_property) { 688 /* setting DPMS property requires special handling, which 689 * is done in legacy setprop path for us. Disallow (for 690 * now?) atomic writes to DPMS property: 691 */ 692 return -EINVAL; 693 } else if (property == config->tv_select_subconnector_property) { 694 state->tv.subconnector = val; 695 } else if (property == config->tv_left_margin_property) { 696 state->tv.margins.left = val; 697 } else if (property == config->tv_right_margin_property) { 698 state->tv.margins.right = val; 699 } else if (property == config->tv_top_margin_property) { 700 state->tv.margins.top = val; 701 } else if (property == config->tv_bottom_margin_property) { 702 state->tv.margins.bottom = val; 703 } else if (property == config->tv_mode_property) { 704 state->tv.mode = val; 705 } else if (property == config->tv_brightness_property) { 706 state->tv.brightness = val; 707 } else if (property == config->tv_contrast_property) { 708 state->tv.contrast = val; 709 } else if (property == config->tv_flicker_reduction_property) { 710 state->tv.flicker_reduction = val; 711 } else if (property == config->tv_overscan_property) { 712 state->tv.overscan = val; 713 } else if (property == config->tv_saturation_property) { 714 state->tv.saturation = val; 715 } else if (property == config->tv_hue_property) { 716 state->tv.hue = val; 717 } else if (property == config->link_status_property) { 718 /* Never downgrade from GOOD to BAD on userspace's request here, 719 * only hw issues can do that. 720 * 721 * For an atomic property the userspace doesn't need to be able 722 * to understand all the properties, but needs to be able to 723 * restore the state it wants on VT switch. So if the userspace 724 * tries to change the link_status from GOOD to BAD, driver 725 * silently rejects it and returns a 0. This prevents userspace 726 * from accidently breaking the display when it restores the 727 * state. 728 */ 729 if (state->link_status != DRM_LINK_STATUS_GOOD) 730 state->link_status = val; 731 } else if (property == config->hdr_output_metadata_property) { 732 ret = drm_atomic_replace_property_blob_from_id(dev, 733 &state->hdr_output_metadata, 734 val, 735 sizeof(struct hdr_output_metadata), -1, 736 &replaced); 737 return ret; 738 } else if (property == config->aspect_ratio_property) { 739 state->picture_aspect_ratio = val; 740 } else if (property == config->content_type_property) { 741 state->content_type = val; 742 } else if (property == connector->scaling_mode_property) { 743 state->scaling_mode = val; 744 } else if (property == config->content_protection_property) { 745 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) { 746 DRM_DEBUG_KMS("only drivers can set CP Enabled\n"); 747 return -EINVAL; 748 } 749 state->content_protection = val; 750 } else if (property == connector->colorspace_property) { 751 state->colorspace = val; 752 } else if (property == config->writeback_fb_id_property) { 753 struct drm_framebuffer *fb; 754 int ret; 755 fb = drm_framebuffer_lookup(dev, file_priv, val); 756 ret = drm_atomic_set_writeback_fb_for_connector(state, fb); 757 if (fb) 758 drm_framebuffer_put(fb); 759 return ret; 760 } else if (property == config->writeback_out_fence_ptr_property) { 761 s32 __user *fence_ptr = u64_to_user_ptr(val); 762 763 return set_out_fence_for_connector(state->state, connector, 764 fence_ptr); 765 } else if (property == connector->max_bpc_property) { 766 state->max_requested_bpc = val; 767 } else if (connector->funcs->atomic_set_property) { 768 return connector->funcs->atomic_set_property(connector, 769 state, property, val); 770 } else { 771 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n", 772 connector->base.id, connector->name, 773 property->base.id, property->name); 774 return -EINVAL; 775 } 776 777 return 0; 778 } 779 780 static int 781 drm_atomic_connector_get_property(struct drm_connector *connector, 782 const struct drm_connector_state *state, 783 struct drm_property *property, uint64_t *val) 784 { 785 struct drm_device *dev = connector->dev; 786 struct drm_mode_config *config = &dev->mode_config; 787 788 if (property == config->prop_crtc_id) { 789 *val = (state->crtc) ? state->crtc->base.id : 0; 790 } else if (property == config->dpms_property) { 791 *val = connector->dpms; 792 } else if (property == config->tv_select_subconnector_property) { 793 *val = state->tv.subconnector; 794 } else if (property == config->tv_left_margin_property) { 795 *val = state->tv.margins.left; 796 } else if (property == config->tv_right_margin_property) { 797 *val = state->tv.margins.right; 798 } else if (property == config->tv_top_margin_property) { 799 *val = state->tv.margins.top; 800 } else if (property == config->tv_bottom_margin_property) { 801 *val = state->tv.margins.bottom; 802 } else if (property == config->tv_mode_property) { 803 *val = state->tv.mode; 804 } else if (property == config->tv_brightness_property) { 805 *val = state->tv.brightness; 806 } else if (property == config->tv_contrast_property) { 807 *val = state->tv.contrast; 808 } else if (property == config->tv_flicker_reduction_property) { 809 *val = state->tv.flicker_reduction; 810 } else if (property == config->tv_overscan_property) { 811 *val = state->tv.overscan; 812 } else if (property == config->tv_saturation_property) { 813 *val = state->tv.saturation; 814 } else if (property == config->tv_hue_property) { 815 *val = state->tv.hue; 816 } else if (property == config->link_status_property) { 817 *val = state->link_status; 818 } else if (property == config->aspect_ratio_property) { 819 *val = state->picture_aspect_ratio; 820 } else if (property == config->content_type_property) { 821 *val = state->content_type; 822 } else if (property == connector->colorspace_property) { 823 *val = state->colorspace; 824 } else if (property == connector->scaling_mode_property) { 825 *val = state->scaling_mode; 826 } else if (property == config->hdr_output_metadata_property) { 827 *val = state->hdr_output_metadata ? 828 state->hdr_output_metadata->base.id : 0; 829 } else if (property == config->content_protection_property) { 830 *val = state->content_protection; 831 } else if (property == config->writeback_fb_id_property) { 832 /* Writeback framebuffer is one-shot, write and forget */ 833 *val = 0; 834 } else if (property == config->writeback_out_fence_ptr_property) { 835 *val = 0; 836 } else if (property == connector->max_bpc_property) { 837 *val = state->max_requested_bpc; 838 } else if (connector->funcs->atomic_get_property) { 839 return connector->funcs->atomic_get_property(connector, 840 state, property, val); 841 } else { 842 return -EINVAL; 843 } 844 845 return 0; 846 } 847 848 int drm_atomic_get_property(struct drm_mode_object *obj, 849 struct drm_property *property, uint64_t *val) 850 { 851 struct drm_device *dev = property->dev; 852 int ret; 853 854 switch (obj->type) { 855 case DRM_MODE_OBJECT_CONNECTOR: { 856 struct drm_connector *connector = obj_to_connector(obj); 857 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 858 ret = drm_atomic_connector_get_property(connector, 859 connector->state, property, val); 860 break; 861 } 862 case DRM_MODE_OBJECT_CRTC: { 863 struct drm_crtc *crtc = obj_to_crtc(obj); 864 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 865 ret = drm_atomic_crtc_get_property(crtc, 866 crtc->state, property, val); 867 break; 868 } 869 case DRM_MODE_OBJECT_PLANE: { 870 struct drm_plane *plane = obj_to_plane(obj); 871 WARN_ON(!drm_modeset_is_locked(&plane->mutex)); 872 ret = drm_atomic_plane_get_property(plane, 873 plane->state, property, val); 874 break; 875 } 876 default: 877 ret = -EINVAL; 878 break; 879 } 880 881 return ret; 882 } 883 884 /* 885 * The big monster ioctl 886 */ 887 888 static struct drm_pending_vblank_event *create_vblank_event( 889 struct drm_crtc *crtc, uint64_t user_data) 890 { 891 struct drm_pending_vblank_event *e = NULL; 892 893 e = kzalloc(sizeof *e, GFP_KERNEL); 894 if (!e) 895 return NULL; 896 897 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 898 e->event.base.length = sizeof(e->event); 899 e->event.vbl.crtc_id = crtc->base.id; 900 e->event.vbl.user_data = user_data; 901 902 return e; 903 } 904 905 int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state, 906 struct drm_connector *connector, 907 int mode) 908 { 909 struct drm_connector *tmp_connector; 910 struct drm_connector_state *new_conn_state; 911 struct drm_crtc *crtc; 912 struct drm_crtc_state *crtc_state; 913 int i, ret, old_mode = connector->dpms; 914 bool active = false; 915 916 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, 917 state->acquire_ctx); 918 if (ret) 919 return ret; 920 921 if (mode != DRM_MODE_DPMS_ON) 922 mode = DRM_MODE_DPMS_OFF; 923 connector->dpms = mode; 924 925 crtc = connector->state->crtc; 926 if (!crtc) 927 goto out; 928 ret = drm_atomic_add_affected_connectors(state, crtc); 929 if (ret) 930 goto out; 931 932 crtc_state = drm_atomic_get_crtc_state(state, crtc); 933 if (IS_ERR(crtc_state)) { 934 ret = PTR_ERR(crtc_state); 935 goto out; 936 } 937 938 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) { 939 if (new_conn_state->crtc != crtc) 940 continue; 941 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { 942 active = true; 943 break; 944 } 945 } 946 947 crtc_state->active = active; 948 ret = drm_atomic_commit(state); 949 out: 950 if (ret != 0) 951 connector->dpms = old_mode; 952 return ret; 953 } 954 955 int drm_atomic_set_property(struct drm_atomic_state *state, 956 struct drm_file *file_priv, 957 struct drm_mode_object *obj, 958 struct drm_property *prop, 959 uint64_t prop_value) 960 { 961 struct drm_mode_object *ref; 962 int ret; 963 964 if (!drm_property_change_valid_get(prop, prop_value, &ref)) 965 return -EINVAL; 966 967 switch (obj->type) { 968 case DRM_MODE_OBJECT_CONNECTOR: { 969 struct drm_connector *connector = obj_to_connector(obj); 970 struct drm_connector_state *connector_state; 971 972 connector_state = drm_atomic_get_connector_state(state, connector); 973 if (IS_ERR(connector_state)) { 974 ret = PTR_ERR(connector_state); 975 break; 976 } 977 978 ret = drm_atomic_connector_set_property(connector, 979 connector_state, file_priv, 980 prop, prop_value); 981 break; 982 } 983 case DRM_MODE_OBJECT_CRTC: { 984 struct drm_crtc *crtc = obj_to_crtc(obj); 985 struct drm_crtc_state *crtc_state; 986 987 crtc_state = drm_atomic_get_crtc_state(state, crtc); 988 if (IS_ERR(crtc_state)) { 989 ret = PTR_ERR(crtc_state); 990 break; 991 } 992 993 ret = drm_atomic_crtc_set_property(crtc, 994 crtc_state, prop, prop_value); 995 break; 996 } 997 case DRM_MODE_OBJECT_PLANE: { 998 struct drm_plane *plane = obj_to_plane(obj); 999 struct drm_plane_state *plane_state; 1000 1001 plane_state = drm_atomic_get_plane_state(state, plane); 1002 if (IS_ERR(plane_state)) { 1003 ret = PTR_ERR(plane_state); 1004 break; 1005 } 1006 1007 ret = drm_atomic_plane_set_property(plane, 1008 plane_state, file_priv, 1009 prop, prop_value); 1010 break; 1011 } 1012 default: 1013 ret = -EINVAL; 1014 break; 1015 } 1016 1017 drm_property_change_valid_put(prop, ref); 1018 return ret; 1019 } 1020 1021 /** 1022 * DOC: explicit fencing properties 1023 * 1024 * Explicit fencing allows userspace to control the buffer synchronization 1025 * between devices. A Fence or a group of fences are transfered to/from 1026 * userspace using Sync File fds and there are two DRM properties for that. 1027 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and 1028 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. 1029 * 1030 * As a contrast, with implicit fencing the kernel keeps track of any 1031 * ongoing rendering, and automatically ensures that the atomic update waits 1032 * for any pending rendering to complete. For shared buffers represented with 1033 * a &struct dma_buf this is tracked in &struct reservation_object. 1034 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org), 1035 * whereas explicit fencing is what Android wants. 1036 * 1037 * "IN_FENCE_FD”: 1038 * Use this property to pass a fence that DRM should wait on before 1039 * proceeding with the Atomic Commit request and show the framebuffer for 1040 * the plane on the screen. The fence can be either a normal fence or a 1041 * merged one, the sync_file framework will handle both cases and use a 1042 * fence_array if a merged fence is received. Passing -1 here means no 1043 * fences to wait on. 1044 * 1045 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag 1046 * it will only check if the Sync File is a valid one. 1047 * 1048 * On the driver side the fence is stored on the @fence parameter of 1049 * &struct drm_plane_state. Drivers which also support implicit fencing 1050 * should set the implicit fence using drm_atomic_set_fence_for_plane(), 1051 * to make sure there's consistent behaviour between drivers in precedence 1052 * of implicit vs. explicit fencing. 1053 * 1054 * "OUT_FENCE_PTR”: 1055 * Use this property to pass a file descriptor pointer to DRM. Once the 1056 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with 1057 * the file descriptor number of a Sync File. This Sync File contains the 1058 * CRTC fence that will be signaled when all framebuffers present on the 1059 * Atomic Commit * request for that given CRTC are scanned out on the 1060 * screen. 1061 * 1062 * The Atomic Commit request fails if a invalid pointer is passed. If the 1063 * Atomic Commit request fails for any other reason the out fence fd 1064 * returned will be -1. On a Atomic Commit with the 1065 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. 1066 * 1067 * Note that out-fences don't have a special interface to drivers and are 1068 * internally represented by a &struct drm_pending_vblank_event in struct 1069 * &drm_crtc_state, which is also used by the nonblocking atomic commit 1070 * helpers and for the DRM event handling for existing userspace. 1071 */ 1072 1073 struct drm_out_fence_state { 1074 s32 __user *out_fence_ptr; 1075 struct sync_file *sync_file; 1076 int fd; 1077 }; 1078 1079 static int setup_out_fence(struct drm_out_fence_state *fence_state, 1080 struct dma_fence *fence) 1081 { 1082 fence_state->fd = get_unused_fd_flags(O_CLOEXEC); 1083 if (fence_state->fd < 0) 1084 return fence_state->fd; 1085 1086 if (put_user(fence_state->fd, fence_state->out_fence_ptr)) 1087 return -EFAULT; 1088 1089 fence_state->sync_file = sync_file_create(fence); 1090 if (!fence_state->sync_file) 1091 return -ENOMEM; 1092 1093 return 0; 1094 } 1095 1096 static int prepare_signaling(struct drm_device *dev, 1097 struct drm_atomic_state *state, 1098 struct drm_mode_atomic *arg, 1099 struct drm_file *file_priv, 1100 struct drm_out_fence_state **fence_state, 1101 unsigned int *num_fences) 1102 { 1103 struct drm_crtc *crtc; 1104 struct drm_crtc_state *crtc_state; 1105 struct drm_connector *conn; 1106 struct drm_connector_state *conn_state; 1107 int i, c = 0, ret; 1108 1109 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) 1110 return 0; 1111 1112 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1113 s32 __user *fence_ptr; 1114 1115 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); 1116 1117 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { 1118 struct drm_pending_vblank_event *e; 1119 1120 e = create_vblank_event(crtc, arg->user_data); 1121 if (!e) 1122 return -ENOMEM; 1123 1124 crtc_state->event = e; 1125 } 1126 1127 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { 1128 struct drm_pending_vblank_event *e = crtc_state->event; 1129 1130 if (!file_priv) 1131 continue; 1132 1133 ret = drm_event_reserve_init(dev, file_priv, &e->base, 1134 &e->event.base); 1135 if (ret) { 1136 kfree(e); 1137 crtc_state->event = NULL; 1138 return ret; 1139 } 1140 } 1141 1142 if (fence_ptr) { 1143 struct dma_fence *fence; 1144 struct drm_out_fence_state *f; 1145 1146 f = krealloc(*fence_state, sizeof(**fence_state) * 1147 (*num_fences + 1), GFP_KERNEL); 1148 if (!f) 1149 return -ENOMEM; 1150 1151 memset(&f[*num_fences], 0, sizeof(*f)); 1152 1153 f[*num_fences].out_fence_ptr = fence_ptr; 1154 *fence_state = f; 1155 1156 fence = drm_crtc_create_fence(crtc); 1157 if (!fence) 1158 return -ENOMEM; 1159 1160 ret = setup_out_fence(&f[(*num_fences)++], fence); 1161 if (ret) { 1162 dma_fence_put(fence); 1163 return ret; 1164 } 1165 1166 crtc_state->event->base.fence = fence; 1167 } 1168 1169 c++; 1170 } 1171 1172 for_each_new_connector_in_state(state, conn, conn_state, i) { 1173 struct drm_writeback_connector *wb_conn; 1174 struct drm_out_fence_state *f; 1175 struct dma_fence *fence; 1176 s32 __user *fence_ptr; 1177 1178 if (!conn_state->writeback_job) 1179 continue; 1180 1181 fence_ptr = get_out_fence_for_connector(state, conn); 1182 if (!fence_ptr) 1183 continue; 1184 1185 f = krealloc(*fence_state, sizeof(**fence_state) * 1186 (*num_fences + 1), GFP_KERNEL); 1187 if (!f) 1188 return -ENOMEM; 1189 1190 memset(&f[*num_fences], 0, sizeof(*f)); 1191 1192 f[*num_fences].out_fence_ptr = fence_ptr; 1193 *fence_state = f; 1194 1195 wb_conn = drm_connector_to_writeback(conn); 1196 fence = drm_writeback_get_out_fence(wb_conn); 1197 if (!fence) 1198 return -ENOMEM; 1199 1200 ret = setup_out_fence(&f[(*num_fences)++], fence); 1201 if (ret) { 1202 dma_fence_put(fence); 1203 return ret; 1204 } 1205 1206 conn_state->writeback_job->out_fence = fence; 1207 } 1208 1209 /* 1210 * Having this flag means user mode pends on event which will never 1211 * reach due to lack of at least one CRTC for signaling 1212 */ 1213 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) 1214 return -EINVAL; 1215 1216 return 0; 1217 } 1218 1219 static void complete_signaling(struct drm_device *dev, 1220 struct drm_atomic_state *state, 1221 struct drm_out_fence_state *fence_state, 1222 unsigned int num_fences, 1223 bool install_fds) 1224 { 1225 struct drm_crtc *crtc; 1226 struct drm_crtc_state *crtc_state; 1227 int i; 1228 1229 if (install_fds) { 1230 for (i = 0; i < num_fences; i++) 1231 fd_install(fence_state[i].fd, 1232 fence_state[i].sync_file->file); 1233 1234 kfree(fence_state); 1235 return; 1236 } 1237 1238 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1239 struct drm_pending_vblank_event *event = crtc_state->event; 1240 /* 1241 * Free the allocated event. drm_atomic_helper_setup_commit 1242 * can allocate an event too, so only free it if it's ours 1243 * to prevent a double free in drm_atomic_state_clear. 1244 */ 1245 if (event && (event->base.fence || event->base.file_priv)) { 1246 drm_event_cancel_free(dev, &event->base); 1247 crtc_state->event = NULL; 1248 } 1249 } 1250 1251 if (!fence_state) 1252 return; 1253 1254 for (i = 0; i < num_fences; i++) { 1255 if (fence_state[i].sync_file) 1256 fput(fence_state[i].sync_file->file); 1257 if (fence_state[i].fd >= 0) 1258 put_unused_fd(fence_state[i].fd); 1259 1260 /* If this fails log error to the user */ 1261 if (fence_state[i].out_fence_ptr && 1262 put_user(-1, fence_state[i].out_fence_ptr)) 1263 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n"); 1264 } 1265 1266 kfree(fence_state); 1267 } 1268 1269 int drm_mode_atomic_ioctl(struct drm_device *dev, 1270 void *data, struct drm_file *file_priv) 1271 { 1272 struct drm_mode_atomic *arg = data; 1273 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); 1274 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); 1275 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 1276 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); 1277 unsigned int copied_objs, copied_props; 1278 struct drm_atomic_state *state; 1279 struct drm_modeset_acquire_ctx ctx; 1280 struct drm_out_fence_state *fence_state; 1281 int ret = 0; 1282 unsigned int i, j, num_fences; 1283 1284 /* disallow for drivers not supporting atomic: */ 1285 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 1286 return -EOPNOTSUPP; 1287 1288 /* disallow for userspace that has not enabled atomic cap (even 1289 * though this may be a bit overkill, since legacy userspace 1290 * wouldn't know how to call this ioctl) 1291 */ 1292 if (!file_priv->atomic) 1293 return -EINVAL; 1294 1295 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) 1296 return -EINVAL; 1297 1298 if (arg->reserved) 1299 return -EINVAL; 1300 1301 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) && 1302 !dev->mode_config.async_page_flip) 1303 return -EINVAL; 1304 1305 /* can't test and expect an event at the same time. */ 1306 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && 1307 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) 1308 return -EINVAL; 1309 1310 state = drm_atomic_state_alloc(dev); 1311 if (!state) 1312 return -ENOMEM; 1313 1314 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); 1315 state->acquire_ctx = &ctx; 1316 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); 1317 1318 retry: 1319 copied_objs = 0; 1320 copied_props = 0; 1321 fence_state = NULL; 1322 num_fences = 0; 1323 1324 for (i = 0; i < arg->count_objs; i++) { 1325 uint32_t obj_id, count_props; 1326 struct drm_mode_object *obj; 1327 1328 if (get_user(obj_id, objs_ptr + copied_objs)) { 1329 ret = -EFAULT; 1330 goto out; 1331 } 1332 1333 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY); 1334 if (!obj) { 1335 ret = -ENOENT; 1336 goto out; 1337 } 1338 1339 if (!obj->properties) { 1340 drm_mode_object_put(obj); 1341 ret = -ENOENT; 1342 goto out; 1343 } 1344 1345 if (get_user(count_props, count_props_ptr + copied_objs)) { 1346 drm_mode_object_put(obj); 1347 ret = -EFAULT; 1348 goto out; 1349 } 1350 1351 copied_objs++; 1352 1353 for (j = 0; j < count_props; j++) { 1354 uint32_t prop_id; 1355 uint64_t prop_value; 1356 struct drm_property *prop; 1357 1358 if (get_user(prop_id, props_ptr + copied_props)) { 1359 drm_mode_object_put(obj); 1360 ret = -EFAULT; 1361 goto out; 1362 } 1363 1364 prop = drm_mode_obj_find_prop_id(obj, prop_id); 1365 if (!prop) { 1366 drm_mode_object_put(obj); 1367 ret = -ENOENT; 1368 goto out; 1369 } 1370 1371 if (copy_from_user(&prop_value, 1372 prop_values_ptr + copied_props, 1373 sizeof(prop_value))) { 1374 drm_mode_object_put(obj); 1375 ret = -EFAULT; 1376 goto out; 1377 } 1378 1379 ret = drm_atomic_set_property(state, file_priv, 1380 obj, prop, prop_value); 1381 if (ret) { 1382 drm_mode_object_put(obj); 1383 goto out; 1384 } 1385 1386 copied_props++; 1387 } 1388 1389 drm_mode_object_put(obj); 1390 } 1391 1392 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, 1393 &num_fences); 1394 if (ret) 1395 goto out; 1396 1397 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { 1398 ret = drm_atomic_check_only(state); 1399 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { 1400 ret = drm_atomic_nonblocking_commit(state); 1401 } else { 1402 if (unlikely(drm_debug & DRM_UT_STATE)) 1403 drm_atomic_print_state(state); 1404 1405 ret = drm_atomic_commit(state); 1406 } 1407 1408 out: 1409 complete_signaling(dev, state, fence_state, num_fences, !ret); 1410 1411 if (ret == -EDEADLK) { 1412 drm_atomic_state_clear(state); 1413 ret = drm_modeset_backoff(&ctx); 1414 if (!ret) 1415 goto retry; 1416 } 1417 1418 drm_atomic_state_put(state); 1419 1420 drm_modeset_drop_locks(&ctx); 1421 drm_modeset_acquire_fini(&ctx); 1422 1423 return ret; 1424 } 1425