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_dbg_atomic(crtc->dev, 89 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 90 mode->name, crtc->base.id, crtc->name, state); 91 } else { 92 memset(&state->mode, 0, sizeof(state->mode)); 93 state->enable = false; 94 drm_dbg_atomic(crtc->dev, 95 "Set [NOMODE] for [CRTC:%d:%s] state %p\n", 96 crtc->base.id, crtc->name, state); 97 } 98 99 return 0; 100 } 101 EXPORT_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 */ 116 int 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_dbg_atomic(crtc->dev, 134 "[CRTC:%d:%s] bad mode blob length: %zu\n", 135 crtc->base.id, crtc->name, 136 blob->length); 137 return -EINVAL; 138 } 139 140 ret = drm_mode_convert_umode(crtc->dev, 141 &state->mode, blob->data); 142 if (ret) { 143 drm_dbg_atomic(crtc->dev, 144 "[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n", 145 crtc->base.id, crtc->name, 146 ret, drm_get_mode_status_name(state->mode.status)); 147 drm_mode_debug_printmodeline(&state->mode); 148 return -EINVAL; 149 } 150 151 state->mode_blob = drm_property_blob_get(blob); 152 state->enable = true; 153 drm_dbg_atomic(crtc->dev, 154 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 155 state->mode.name, crtc->base.id, crtc->name, 156 state); 157 } else { 158 state->enable = false; 159 drm_dbg_atomic(crtc->dev, 160 "Set [NOMODE] for [CRTC:%d:%s] state %p\n", 161 crtc->base.id, crtc->name, state); 162 } 163 164 return 0; 165 } 166 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); 167 168 /** 169 * drm_atomic_set_crtc_for_plane - set CRTC for plane 170 * @plane_state: the plane whose incoming state to update 171 * @crtc: CRTC to use for the plane 172 * 173 * Changing the assigned CRTC for a plane requires us to grab the lock and state 174 * for the new CRTC, as needed. This function takes care of all these details 175 * besides updating the pointer in the state object itself. 176 * 177 * Returns: 178 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 179 * then the w/w mutex code has detected a deadlock and the entire atomic 180 * sequence must be restarted. All other errors are fatal. 181 */ 182 int 183 drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, 184 struct drm_crtc *crtc) 185 { 186 struct drm_plane *plane = plane_state->plane; 187 struct drm_crtc_state *crtc_state; 188 /* Nothing to do for same crtc*/ 189 if (plane_state->crtc == crtc) 190 return 0; 191 if (plane_state->crtc) { 192 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 193 plane_state->crtc); 194 if (WARN_ON(IS_ERR(crtc_state))) 195 return PTR_ERR(crtc_state); 196 197 crtc_state->plane_mask &= ~drm_plane_mask(plane); 198 } 199 200 plane_state->crtc = crtc; 201 202 if (crtc) { 203 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 204 crtc); 205 if (IS_ERR(crtc_state)) 206 return PTR_ERR(crtc_state); 207 crtc_state->plane_mask |= drm_plane_mask(plane); 208 } 209 210 if (crtc) 211 drm_dbg_atomic(plane->dev, 212 "Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n", 213 plane->base.id, plane->name, plane_state, 214 crtc->base.id, crtc->name); 215 else 216 drm_dbg_atomic(plane->dev, 217 "Link [PLANE:%d:%s] state %p to [NOCRTC]\n", 218 plane->base.id, plane->name, plane_state); 219 220 return 0; 221 } 222 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane); 223 224 /** 225 * drm_atomic_set_fb_for_plane - set framebuffer for plane 226 * @plane_state: atomic state object for the plane 227 * @fb: fb to use for the plane 228 * 229 * Changing the assigned framebuffer for a plane requires us to grab a reference 230 * to the new fb and drop the reference to the old fb, if there is one. This 231 * function takes care of all these details besides updating the pointer in the 232 * state object itself. 233 */ 234 void 235 drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, 236 struct drm_framebuffer *fb) 237 { 238 struct drm_plane *plane = plane_state->plane; 239 240 if (fb) 241 drm_dbg_atomic(plane->dev, 242 "Set [FB:%d] for [PLANE:%d:%s] state %p\n", 243 fb->base.id, plane->base.id, plane->name, 244 plane_state); 245 else 246 drm_dbg_atomic(plane->dev, 247 "Set [NOFB] for [PLANE:%d:%s] state %p\n", 248 plane->base.id, plane->name, plane_state); 249 250 drm_framebuffer_assign(&plane_state->fb, fb); 251 } 252 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); 253 254 /** 255 * drm_atomic_set_fence_for_plane - set fence for plane 256 * @plane_state: atomic state object for the plane 257 * @fence: dma_fence to use for the plane 258 * 259 * Helper to setup the plane_state fence in case it is not set yet. 260 * By using this drivers doesn't need to worry if the user choose 261 * implicit or explicit fencing. 262 * 263 * This function will not set the fence to the state if it was set 264 * via explicit fencing interfaces on the atomic ioctl. In that case it will 265 * drop the reference to the fence as we are not storing it anywhere. 266 * Otherwise, if &drm_plane_state.fence is not set this function we just set it 267 * with the received implicit fence. In both cases this function consumes a 268 * reference for @fence. 269 * 270 * This way explicit fencing can be used to overrule implicit fencing, which is 271 * important to make explicit fencing use-cases work: One example is using one 272 * buffer for 2 screens with different refresh rates. Implicit fencing will 273 * clamp rendering to the refresh rate of the slower screen, whereas explicit 274 * fence allows 2 independent render and display loops on a single buffer. If a 275 * driver allows obeys both implicit and explicit fences for plane updates, then 276 * it will break all the benefits of explicit fencing. 277 */ 278 void 279 drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state, 280 struct dma_fence *fence) 281 { 282 if (plane_state->fence) { 283 dma_fence_put(fence); 284 return; 285 } 286 287 plane_state->fence = fence; 288 } 289 EXPORT_SYMBOL(drm_atomic_set_fence_for_plane); 290 291 /** 292 * drm_atomic_set_crtc_for_connector - set CRTC for connector 293 * @conn_state: atomic state object for the connector 294 * @crtc: CRTC to use for the connector 295 * 296 * Changing the assigned CRTC for a connector requires us to grab the lock and 297 * state for the new CRTC, as needed. This function takes care of all these 298 * details besides updating the pointer in the state object itself. 299 * 300 * Returns: 301 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 302 * then the w/w mutex code has detected a deadlock and the entire atomic 303 * sequence must be restarted. All other errors are fatal. 304 */ 305 int 306 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, 307 struct drm_crtc *crtc) 308 { 309 struct drm_connector *connector = conn_state->connector; 310 struct drm_crtc_state *crtc_state; 311 312 if (conn_state->crtc == crtc) 313 return 0; 314 315 if (conn_state->crtc) { 316 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state, 317 conn_state->crtc); 318 319 crtc_state->connector_mask &= 320 ~drm_connector_mask(conn_state->connector); 321 322 drm_connector_put(conn_state->connector); 323 conn_state->crtc = NULL; 324 } 325 326 if (crtc) { 327 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); 328 if (IS_ERR(crtc_state)) 329 return PTR_ERR(crtc_state); 330 331 crtc_state->connector_mask |= 332 drm_connector_mask(conn_state->connector); 333 334 drm_connector_get(conn_state->connector); 335 conn_state->crtc = crtc; 336 337 drm_dbg_atomic(connector->dev, 338 "Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n", 339 connector->base.id, connector->name, 340 conn_state, crtc->base.id, crtc->name); 341 } else { 342 drm_dbg_atomic(connector->dev, 343 "Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n", 344 connector->base.id, connector->name, 345 conn_state); 346 } 347 348 return 0; 349 } 350 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); 351 352 static void set_out_fence_for_crtc(struct drm_atomic_state *state, 353 struct drm_crtc *crtc, s32 __user *fence_ptr) 354 { 355 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; 356 } 357 358 static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state, 359 struct drm_crtc *crtc) 360 { 361 s32 __user *fence_ptr; 362 363 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; 364 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; 365 366 return fence_ptr; 367 } 368 369 static int set_out_fence_for_connector(struct drm_atomic_state *state, 370 struct drm_connector *connector, 371 s32 __user *fence_ptr) 372 { 373 unsigned int index = drm_connector_index(connector); 374 375 if (!fence_ptr) 376 return 0; 377 378 if (put_user(-1, fence_ptr)) 379 return -EFAULT; 380 381 state->connectors[index].out_fence_ptr = fence_ptr; 382 383 return 0; 384 } 385 386 static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state, 387 struct drm_connector *connector) 388 { 389 unsigned int index = drm_connector_index(connector); 390 s32 __user *fence_ptr; 391 392 fence_ptr = state->connectors[index].out_fence_ptr; 393 state->connectors[index].out_fence_ptr = NULL; 394 395 return fence_ptr; 396 } 397 398 static int 399 drm_atomic_replace_property_blob_from_id(struct drm_device *dev, 400 struct drm_property_blob **blob, 401 uint64_t blob_id, 402 ssize_t expected_size, 403 ssize_t expected_elem_size, 404 bool *replaced) 405 { 406 struct drm_property_blob *new_blob = NULL; 407 408 if (blob_id != 0) { 409 new_blob = drm_property_lookup_blob(dev, blob_id); 410 if (new_blob == NULL) 411 return -EINVAL; 412 413 if (expected_size > 0 && 414 new_blob->length != expected_size) { 415 drm_property_blob_put(new_blob); 416 return -EINVAL; 417 } 418 if (expected_elem_size > 0 && 419 new_blob->length % expected_elem_size != 0) { 420 drm_property_blob_put(new_blob); 421 return -EINVAL; 422 } 423 } 424 425 *replaced |= drm_property_replace_blob(blob, new_blob); 426 drm_property_blob_put(new_blob); 427 428 return 0; 429 } 430 431 static int drm_atomic_crtc_set_property(struct drm_crtc *crtc, 432 struct drm_crtc_state *state, struct drm_property *property, 433 uint64_t val) 434 { 435 struct drm_device *dev = crtc->dev; 436 struct drm_mode_config *config = &dev->mode_config; 437 bool replaced = false; 438 int ret; 439 440 if (property == config->prop_active) 441 state->active = val; 442 else if (property == config->prop_mode_id) { 443 struct drm_property_blob *mode = 444 drm_property_lookup_blob(dev, val); 445 ret = drm_atomic_set_mode_prop_for_crtc(state, mode); 446 drm_property_blob_put(mode); 447 return ret; 448 } else if (property == config->prop_vrr_enabled) { 449 state->vrr_enabled = val; 450 } else if (property == config->degamma_lut_property) { 451 ret = drm_atomic_replace_property_blob_from_id(dev, 452 &state->degamma_lut, 453 val, 454 -1, sizeof(struct drm_color_lut), 455 &replaced); 456 state->color_mgmt_changed |= replaced; 457 return ret; 458 } else if (property == config->ctm_property) { 459 ret = drm_atomic_replace_property_blob_from_id(dev, 460 &state->ctm, 461 val, 462 sizeof(struct drm_color_ctm), -1, 463 &replaced); 464 state->color_mgmt_changed |= replaced; 465 return ret; 466 } else if (property == config->gamma_lut_property) { 467 ret = drm_atomic_replace_property_blob_from_id(dev, 468 &state->gamma_lut, 469 val, 470 -1, sizeof(struct drm_color_lut), 471 &replaced); 472 state->color_mgmt_changed |= replaced; 473 return ret; 474 } else if (property == config->prop_out_fence_ptr) { 475 s32 __user *fence_ptr = u64_to_user_ptr(val); 476 477 if (!fence_ptr) 478 return 0; 479 480 if (put_user(-1, fence_ptr)) 481 return -EFAULT; 482 483 set_out_fence_for_crtc(state->state, crtc, fence_ptr); 484 } else if (property == crtc->scaling_filter_property) { 485 state->scaling_filter = val; 486 } else if (crtc->funcs->atomic_set_property) { 487 return crtc->funcs->atomic_set_property(crtc, state, property, val); 488 } else { 489 drm_dbg_atomic(crtc->dev, 490 "[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n", 491 crtc->base.id, crtc->name, 492 property->base.id, property->name); 493 return -EINVAL; 494 } 495 496 return 0; 497 } 498 499 static int 500 drm_atomic_crtc_get_property(struct drm_crtc *crtc, 501 const struct drm_crtc_state *state, 502 struct drm_property *property, uint64_t *val) 503 { 504 struct drm_device *dev = crtc->dev; 505 struct drm_mode_config *config = &dev->mode_config; 506 507 if (property == config->prop_active) 508 *val = drm_atomic_crtc_effectively_active(state); 509 else if (property == config->prop_mode_id) 510 *val = (state->mode_blob) ? state->mode_blob->base.id : 0; 511 else if (property == config->prop_vrr_enabled) 512 *val = state->vrr_enabled; 513 else if (property == config->degamma_lut_property) 514 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; 515 else if (property == config->ctm_property) 516 *val = (state->ctm) ? state->ctm->base.id : 0; 517 else if (property == config->gamma_lut_property) 518 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; 519 else if (property == config->prop_out_fence_ptr) 520 *val = 0; 521 else if (property == crtc->scaling_filter_property) 522 *val = state->scaling_filter; 523 else if (crtc->funcs->atomic_get_property) 524 return crtc->funcs->atomic_get_property(crtc, state, property, val); 525 else 526 return -EINVAL; 527 528 return 0; 529 } 530 531 static int drm_atomic_plane_set_property(struct drm_plane *plane, 532 struct drm_plane_state *state, struct drm_file *file_priv, 533 struct drm_property *property, uint64_t val) 534 { 535 struct drm_device *dev = plane->dev; 536 struct drm_mode_config *config = &dev->mode_config; 537 bool replaced = false; 538 int ret; 539 540 if (property == config->prop_fb_id) { 541 struct drm_framebuffer *fb; 542 543 fb = drm_framebuffer_lookup(dev, file_priv, val); 544 drm_atomic_set_fb_for_plane(state, fb); 545 if (fb) 546 drm_framebuffer_put(fb); 547 } else if (property == config->prop_in_fence_fd) { 548 if (state->fence) 549 return -EINVAL; 550 551 if (U642I64(val) == -1) 552 return 0; 553 554 state->fence = sync_file_get_fence(val); 555 if (!state->fence) 556 return -EINVAL; 557 558 } else if (property == config->prop_crtc_id) { 559 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 560 561 if (val && !crtc) 562 return -EACCES; 563 return drm_atomic_set_crtc_for_plane(state, crtc); 564 } else if (property == config->prop_crtc_x) { 565 state->crtc_x = U642I64(val); 566 } else if (property == config->prop_crtc_y) { 567 state->crtc_y = U642I64(val); 568 } else if (property == config->prop_crtc_w) { 569 state->crtc_w = val; 570 } else if (property == config->prop_crtc_h) { 571 state->crtc_h = val; 572 } else if (property == config->prop_src_x) { 573 state->src_x = val; 574 } else if (property == config->prop_src_y) { 575 state->src_y = val; 576 } else if (property == config->prop_src_w) { 577 state->src_w = val; 578 } else if (property == config->prop_src_h) { 579 state->src_h = val; 580 } else if (property == plane->alpha_property) { 581 state->alpha = val; 582 } else if (property == plane->blend_mode_property) { 583 state->pixel_blend_mode = val; 584 } else if (property == plane->rotation_property) { 585 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) { 586 drm_dbg_atomic(plane->dev, 587 "[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n", 588 plane->base.id, plane->name, val); 589 return -EINVAL; 590 } 591 state->rotation = val; 592 } else if (property == plane->zpos_property) { 593 state->zpos = val; 594 } else if (property == plane->color_encoding_property) { 595 state->color_encoding = val; 596 } else if (property == plane->color_range_property) { 597 state->color_range = val; 598 } else if (property == config->prop_fb_damage_clips) { 599 ret = drm_atomic_replace_property_blob_from_id(dev, 600 &state->fb_damage_clips, 601 val, 602 -1, 603 sizeof(struct drm_rect), 604 &replaced); 605 return ret; 606 } else if (property == plane->scaling_filter_property) { 607 state->scaling_filter = val; 608 } else if (plane->funcs->atomic_set_property) { 609 return plane->funcs->atomic_set_property(plane, state, 610 property, val); 611 } else { 612 drm_dbg_atomic(plane->dev, 613 "[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n", 614 plane->base.id, plane->name, 615 property->base.id, property->name); 616 return -EINVAL; 617 } 618 619 return 0; 620 } 621 622 static int 623 drm_atomic_plane_get_property(struct drm_plane *plane, 624 const struct drm_plane_state *state, 625 struct drm_property *property, uint64_t *val) 626 { 627 struct drm_device *dev = plane->dev; 628 struct drm_mode_config *config = &dev->mode_config; 629 630 if (property == config->prop_fb_id) { 631 *val = (state->fb) ? state->fb->base.id : 0; 632 } else if (property == config->prop_in_fence_fd) { 633 *val = -1; 634 } else if (property == config->prop_crtc_id) { 635 *val = (state->crtc) ? state->crtc->base.id : 0; 636 } else if (property == config->prop_crtc_x) { 637 *val = I642U64(state->crtc_x); 638 } else if (property == config->prop_crtc_y) { 639 *val = I642U64(state->crtc_y); 640 } else if (property == config->prop_crtc_w) { 641 *val = state->crtc_w; 642 } else if (property == config->prop_crtc_h) { 643 *val = state->crtc_h; 644 } else if (property == config->prop_src_x) { 645 *val = state->src_x; 646 } else if (property == config->prop_src_y) { 647 *val = state->src_y; 648 } else if (property == config->prop_src_w) { 649 *val = state->src_w; 650 } else if (property == config->prop_src_h) { 651 *val = state->src_h; 652 } else if (property == plane->alpha_property) { 653 *val = state->alpha; 654 } else if (property == plane->blend_mode_property) { 655 *val = state->pixel_blend_mode; 656 } else if (property == plane->rotation_property) { 657 *val = state->rotation; 658 } else if (property == plane->zpos_property) { 659 *val = state->zpos; 660 } else if (property == plane->color_encoding_property) { 661 *val = state->color_encoding; 662 } else if (property == plane->color_range_property) { 663 *val = state->color_range; 664 } else if (property == config->prop_fb_damage_clips) { 665 *val = (state->fb_damage_clips) ? 666 state->fb_damage_clips->base.id : 0; 667 } else if (property == plane->scaling_filter_property) { 668 *val = state->scaling_filter; 669 } else if (plane->funcs->atomic_get_property) { 670 return plane->funcs->atomic_get_property(plane, state, property, val); 671 } else { 672 return -EINVAL; 673 } 674 675 return 0; 676 } 677 678 static int drm_atomic_set_writeback_fb_for_connector( 679 struct drm_connector_state *conn_state, 680 struct drm_framebuffer *fb) 681 { 682 int ret; 683 struct drm_connector *conn = conn_state->connector; 684 685 ret = drm_writeback_set_fb(conn_state, fb); 686 if (ret < 0) 687 return ret; 688 689 if (fb) 690 drm_dbg_atomic(conn->dev, 691 "Set [FB:%d] for connector state %p\n", 692 fb->base.id, conn_state); 693 else 694 drm_dbg_atomic(conn->dev, 695 "Set [NOFB] for connector state %p\n", 696 conn_state); 697 698 return 0; 699 } 700 701 static int drm_atomic_connector_set_property(struct drm_connector *connector, 702 struct drm_connector_state *state, struct drm_file *file_priv, 703 struct drm_property *property, uint64_t val) 704 { 705 struct drm_device *dev = connector->dev; 706 struct drm_mode_config *config = &dev->mode_config; 707 bool replaced = false; 708 int ret; 709 710 if (property == config->prop_crtc_id) { 711 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 712 713 if (val && !crtc) 714 return -EACCES; 715 return drm_atomic_set_crtc_for_connector(state, crtc); 716 } else if (property == config->dpms_property) { 717 /* setting DPMS property requires special handling, which 718 * is done in legacy setprop path for us. Disallow (for 719 * now?) atomic writes to DPMS property: 720 */ 721 return -EINVAL; 722 } else if (property == config->tv_select_subconnector_property) { 723 state->tv.subconnector = val; 724 } else if (property == config->tv_left_margin_property) { 725 state->tv.margins.left = val; 726 } else if (property == config->tv_right_margin_property) { 727 state->tv.margins.right = val; 728 } else if (property == config->tv_top_margin_property) { 729 state->tv.margins.top = val; 730 } else if (property == config->tv_bottom_margin_property) { 731 state->tv.margins.bottom = val; 732 } else if (property == config->tv_mode_property) { 733 state->tv.mode = val; 734 } else if (property == config->tv_brightness_property) { 735 state->tv.brightness = val; 736 } else if (property == config->tv_contrast_property) { 737 state->tv.contrast = val; 738 } else if (property == config->tv_flicker_reduction_property) { 739 state->tv.flicker_reduction = val; 740 } else if (property == config->tv_overscan_property) { 741 state->tv.overscan = val; 742 } else if (property == config->tv_saturation_property) { 743 state->tv.saturation = val; 744 } else if (property == config->tv_hue_property) { 745 state->tv.hue = val; 746 } else if (property == config->link_status_property) { 747 /* Never downgrade from GOOD to BAD on userspace's request here, 748 * only hw issues can do that. 749 * 750 * For an atomic property the userspace doesn't need to be able 751 * to understand all the properties, but needs to be able to 752 * restore the state it wants on VT switch. So if the userspace 753 * tries to change the link_status from GOOD to BAD, driver 754 * silently rejects it and returns a 0. This prevents userspace 755 * from accidently breaking the display when it restores the 756 * state. 757 */ 758 if (state->link_status != DRM_LINK_STATUS_GOOD) 759 state->link_status = val; 760 } else if (property == config->hdr_output_metadata_property) { 761 ret = drm_atomic_replace_property_blob_from_id(dev, 762 &state->hdr_output_metadata, 763 val, 764 sizeof(struct hdr_output_metadata), -1, 765 &replaced); 766 return ret; 767 } else if (property == config->aspect_ratio_property) { 768 state->picture_aspect_ratio = val; 769 } else if (property == config->content_type_property) { 770 state->content_type = val; 771 } else if (property == connector->scaling_mode_property) { 772 state->scaling_mode = val; 773 } else if (property == config->content_protection_property) { 774 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) { 775 DRM_DEBUG_KMS("only drivers can set CP Enabled\n"); 776 return -EINVAL; 777 } 778 state->content_protection = val; 779 } else if (property == config->hdcp_content_type_property) { 780 state->hdcp_content_type = val; 781 } else if (property == connector->colorspace_property) { 782 state->colorspace = val; 783 } else if (property == config->writeback_fb_id_property) { 784 struct drm_framebuffer *fb; 785 int ret; 786 787 fb = drm_framebuffer_lookup(dev, file_priv, val); 788 ret = drm_atomic_set_writeback_fb_for_connector(state, fb); 789 if (fb) 790 drm_framebuffer_put(fb); 791 return ret; 792 } else if (property == config->writeback_out_fence_ptr_property) { 793 s32 __user *fence_ptr = u64_to_user_ptr(val); 794 795 return set_out_fence_for_connector(state->state, connector, 796 fence_ptr); 797 } else if (property == connector->max_bpc_property) { 798 state->max_requested_bpc = val; 799 } else if (connector->funcs->atomic_set_property) { 800 return connector->funcs->atomic_set_property(connector, 801 state, property, val); 802 } else { 803 drm_dbg_atomic(connector->dev, 804 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n", 805 connector->base.id, connector->name, 806 property->base.id, property->name); 807 return -EINVAL; 808 } 809 810 return 0; 811 } 812 813 static int 814 drm_atomic_connector_get_property(struct drm_connector *connector, 815 const struct drm_connector_state *state, 816 struct drm_property *property, uint64_t *val) 817 { 818 struct drm_device *dev = connector->dev; 819 struct drm_mode_config *config = &dev->mode_config; 820 821 if (property == config->prop_crtc_id) { 822 *val = (state->crtc) ? state->crtc->base.id : 0; 823 } else if (property == config->dpms_property) { 824 if (state->crtc && state->crtc->state->self_refresh_active) 825 *val = DRM_MODE_DPMS_ON; 826 else 827 *val = connector->dpms; 828 } else if (property == config->tv_select_subconnector_property) { 829 *val = state->tv.subconnector; 830 } else if (property == config->tv_left_margin_property) { 831 *val = state->tv.margins.left; 832 } else if (property == config->tv_right_margin_property) { 833 *val = state->tv.margins.right; 834 } else if (property == config->tv_top_margin_property) { 835 *val = state->tv.margins.top; 836 } else if (property == config->tv_bottom_margin_property) { 837 *val = state->tv.margins.bottom; 838 } else if (property == config->tv_mode_property) { 839 *val = state->tv.mode; 840 } else if (property == config->tv_brightness_property) { 841 *val = state->tv.brightness; 842 } else if (property == config->tv_contrast_property) { 843 *val = state->tv.contrast; 844 } else if (property == config->tv_flicker_reduction_property) { 845 *val = state->tv.flicker_reduction; 846 } else if (property == config->tv_overscan_property) { 847 *val = state->tv.overscan; 848 } else if (property == config->tv_saturation_property) { 849 *val = state->tv.saturation; 850 } else if (property == config->tv_hue_property) { 851 *val = state->tv.hue; 852 } else if (property == config->link_status_property) { 853 *val = state->link_status; 854 } else if (property == config->aspect_ratio_property) { 855 *val = state->picture_aspect_ratio; 856 } else if (property == config->content_type_property) { 857 *val = state->content_type; 858 } else if (property == connector->colorspace_property) { 859 *val = state->colorspace; 860 } else if (property == connector->scaling_mode_property) { 861 *val = state->scaling_mode; 862 } else if (property == config->hdr_output_metadata_property) { 863 *val = state->hdr_output_metadata ? 864 state->hdr_output_metadata->base.id : 0; 865 } else if (property == config->content_protection_property) { 866 *val = state->content_protection; 867 } else if (property == config->hdcp_content_type_property) { 868 *val = state->hdcp_content_type; 869 } else if (property == config->writeback_fb_id_property) { 870 /* Writeback framebuffer is one-shot, write and forget */ 871 *val = 0; 872 } else if (property == config->writeback_out_fence_ptr_property) { 873 *val = 0; 874 } else if (property == connector->max_bpc_property) { 875 *val = state->max_requested_bpc; 876 } else if (connector->funcs->atomic_get_property) { 877 return connector->funcs->atomic_get_property(connector, 878 state, property, val); 879 } else { 880 return -EINVAL; 881 } 882 883 return 0; 884 } 885 886 int drm_atomic_get_property(struct drm_mode_object *obj, 887 struct drm_property *property, uint64_t *val) 888 { 889 struct drm_device *dev = property->dev; 890 int ret; 891 892 switch (obj->type) { 893 case DRM_MODE_OBJECT_CONNECTOR: { 894 struct drm_connector *connector = obj_to_connector(obj); 895 896 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 897 ret = drm_atomic_connector_get_property(connector, 898 connector->state, property, val); 899 break; 900 } 901 case DRM_MODE_OBJECT_CRTC: { 902 struct drm_crtc *crtc = obj_to_crtc(obj); 903 904 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 905 ret = drm_atomic_crtc_get_property(crtc, 906 crtc->state, property, val); 907 break; 908 } 909 case DRM_MODE_OBJECT_PLANE: { 910 struct drm_plane *plane = obj_to_plane(obj); 911 912 WARN_ON(!drm_modeset_is_locked(&plane->mutex)); 913 ret = drm_atomic_plane_get_property(plane, 914 plane->state, property, val); 915 break; 916 } 917 default: 918 ret = -EINVAL; 919 break; 920 } 921 922 return ret; 923 } 924 925 /* 926 * The big monster ioctl 927 */ 928 929 static struct drm_pending_vblank_event *create_vblank_event( 930 struct drm_crtc *crtc, uint64_t user_data) 931 { 932 struct drm_pending_vblank_event *e = NULL; 933 934 e = kzalloc(sizeof *e, GFP_KERNEL); 935 if (!e) 936 return NULL; 937 938 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 939 e->event.base.length = sizeof(e->event); 940 e->event.vbl.crtc_id = crtc->base.id; 941 e->event.vbl.user_data = user_data; 942 943 return e; 944 } 945 946 int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state, 947 struct drm_connector *connector, 948 int mode) 949 { 950 struct drm_connector *tmp_connector; 951 struct drm_connector_state *new_conn_state; 952 struct drm_crtc *crtc; 953 struct drm_crtc_state *crtc_state; 954 int i, ret, old_mode = connector->dpms; 955 bool active = false; 956 957 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, 958 state->acquire_ctx); 959 if (ret) 960 return ret; 961 962 if (mode != DRM_MODE_DPMS_ON) 963 mode = DRM_MODE_DPMS_OFF; 964 connector->dpms = mode; 965 966 crtc = connector->state->crtc; 967 if (!crtc) 968 goto out; 969 ret = drm_atomic_add_affected_connectors(state, crtc); 970 if (ret) 971 goto out; 972 973 crtc_state = drm_atomic_get_crtc_state(state, crtc); 974 if (IS_ERR(crtc_state)) { 975 ret = PTR_ERR(crtc_state); 976 goto out; 977 } 978 979 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) { 980 if (new_conn_state->crtc != crtc) 981 continue; 982 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { 983 active = true; 984 break; 985 } 986 } 987 988 crtc_state->active = active; 989 ret = drm_atomic_commit(state); 990 out: 991 if (ret != 0) 992 connector->dpms = old_mode; 993 return ret; 994 } 995 996 int drm_atomic_set_property(struct drm_atomic_state *state, 997 struct drm_file *file_priv, 998 struct drm_mode_object *obj, 999 struct drm_property *prop, 1000 uint64_t prop_value) 1001 { 1002 struct drm_mode_object *ref; 1003 int ret; 1004 1005 if (!drm_property_change_valid_get(prop, prop_value, &ref)) 1006 return -EINVAL; 1007 1008 switch (obj->type) { 1009 case DRM_MODE_OBJECT_CONNECTOR: { 1010 struct drm_connector *connector = obj_to_connector(obj); 1011 struct drm_connector_state *connector_state; 1012 1013 connector_state = drm_atomic_get_connector_state(state, connector); 1014 if (IS_ERR(connector_state)) { 1015 ret = PTR_ERR(connector_state); 1016 break; 1017 } 1018 1019 ret = drm_atomic_connector_set_property(connector, 1020 connector_state, file_priv, 1021 prop, prop_value); 1022 break; 1023 } 1024 case DRM_MODE_OBJECT_CRTC: { 1025 struct drm_crtc *crtc = obj_to_crtc(obj); 1026 struct drm_crtc_state *crtc_state; 1027 1028 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1029 if (IS_ERR(crtc_state)) { 1030 ret = PTR_ERR(crtc_state); 1031 break; 1032 } 1033 1034 ret = drm_atomic_crtc_set_property(crtc, 1035 crtc_state, prop, prop_value); 1036 break; 1037 } 1038 case DRM_MODE_OBJECT_PLANE: { 1039 struct drm_plane *plane = obj_to_plane(obj); 1040 struct drm_plane_state *plane_state; 1041 1042 plane_state = drm_atomic_get_plane_state(state, plane); 1043 if (IS_ERR(plane_state)) { 1044 ret = PTR_ERR(plane_state); 1045 break; 1046 } 1047 1048 ret = drm_atomic_plane_set_property(plane, 1049 plane_state, file_priv, 1050 prop, prop_value); 1051 break; 1052 } 1053 default: 1054 ret = -EINVAL; 1055 break; 1056 } 1057 1058 drm_property_change_valid_put(prop, ref); 1059 return ret; 1060 } 1061 1062 /** 1063 * DOC: explicit fencing properties 1064 * 1065 * Explicit fencing allows userspace to control the buffer synchronization 1066 * between devices. A Fence or a group of fences are transfered to/from 1067 * userspace using Sync File fds and there are two DRM properties for that. 1068 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and 1069 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. 1070 * 1071 * As a contrast, with implicit fencing the kernel keeps track of any 1072 * ongoing rendering, and automatically ensures that the atomic update waits 1073 * for any pending rendering to complete. For shared buffers represented with 1074 * a &struct dma_buf this is tracked in &struct dma_resv. 1075 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org), 1076 * whereas explicit fencing is what Android wants. 1077 * 1078 * "IN_FENCE_FD”: 1079 * Use this property to pass a fence that DRM should wait on before 1080 * proceeding with the Atomic Commit request and show the framebuffer for 1081 * the plane on the screen. The fence can be either a normal fence or a 1082 * merged one, the sync_file framework will handle both cases and use a 1083 * fence_array if a merged fence is received. Passing -1 here means no 1084 * fences to wait on. 1085 * 1086 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag 1087 * it will only check if the Sync File is a valid one. 1088 * 1089 * On the driver side the fence is stored on the @fence parameter of 1090 * &struct drm_plane_state. Drivers which also support implicit fencing 1091 * should set the implicit fence using drm_atomic_set_fence_for_plane(), 1092 * to make sure there's consistent behaviour between drivers in precedence 1093 * of implicit vs. explicit fencing. 1094 * 1095 * "OUT_FENCE_PTR”: 1096 * Use this property to pass a file descriptor pointer to DRM. Once the 1097 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with 1098 * the file descriptor number of a Sync File. This Sync File contains the 1099 * CRTC fence that will be signaled when all framebuffers present on the 1100 * Atomic Commit * request for that given CRTC are scanned out on the 1101 * screen. 1102 * 1103 * The Atomic Commit request fails if a invalid pointer is passed. If the 1104 * Atomic Commit request fails for any other reason the out fence fd 1105 * returned will be -1. On a Atomic Commit with the 1106 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. 1107 * 1108 * Note that out-fences don't have a special interface to drivers and are 1109 * internally represented by a &struct drm_pending_vblank_event in struct 1110 * &drm_crtc_state, which is also used by the nonblocking atomic commit 1111 * helpers and for the DRM event handling for existing userspace. 1112 */ 1113 1114 struct drm_out_fence_state { 1115 s32 __user *out_fence_ptr; 1116 struct sync_file *sync_file; 1117 int fd; 1118 }; 1119 1120 static int setup_out_fence(struct drm_out_fence_state *fence_state, 1121 struct dma_fence *fence) 1122 { 1123 fence_state->fd = get_unused_fd_flags(O_CLOEXEC); 1124 if (fence_state->fd < 0) 1125 return fence_state->fd; 1126 1127 if (put_user(fence_state->fd, fence_state->out_fence_ptr)) 1128 return -EFAULT; 1129 1130 fence_state->sync_file = sync_file_create(fence); 1131 if (!fence_state->sync_file) 1132 return -ENOMEM; 1133 1134 return 0; 1135 } 1136 1137 static int prepare_signaling(struct drm_device *dev, 1138 struct drm_atomic_state *state, 1139 struct drm_mode_atomic *arg, 1140 struct drm_file *file_priv, 1141 struct drm_out_fence_state **fence_state, 1142 unsigned int *num_fences) 1143 { 1144 struct drm_crtc *crtc; 1145 struct drm_crtc_state *crtc_state; 1146 struct drm_connector *conn; 1147 struct drm_connector_state *conn_state; 1148 int i, c = 0, ret; 1149 1150 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) 1151 return 0; 1152 1153 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1154 s32 __user *fence_ptr; 1155 1156 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); 1157 1158 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { 1159 struct drm_pending_vblank_event *e; 1160 1161 e = create_vblank_event(crtc, arg->user_data); 1162 if (!e) 1163 return -ENOMEM; 1164 1165 crtc_state->event = e; 1166 } 1167 1168 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { 1169 struct drm_pending_vblank_event *e = crtc_state->event; 1170 1171 if (!file_priv) 1172 continue; 1173 1174 ret = drm_event_reserve_init(dev, file_priv, &e->base, 1175 &e->event.base); 1176 if (ret) { 1177 kfree(e); 1178 crtc_state->event = NULL; 1179 return ret; 1180 } 1181 } 1182 1183 if (fence_ptr) { 1184 struct dma_fence *fence; 1185 struct drm_out_fence_state *f; 1186 1187 f = krealloc(*fence_state, sizeof(**fence_state) * 1188 (*num_fences + 1), GFP_KERNEL); 1189 if (!f) 1190 return -ENOMEM; 1191 1192 memset(&f[*num_fences], 0, sizeof(*f)); 1193 1194 f[*num_fences].out_fence_ptr = fence_ptr; 1195 *fence_state = f; 1196 1197 fence = drm_crtc_create_fence(crtc); 1198 if (!fence) 1199 return -ENOMEM; 1200 1201 ret = setup_out_fence(&f[(*num_fences)++], fence); 1202 if (ret) { 1203 dma_fence_put(fence); 1204 return ret; 1205 } 1206 1207 crtc_state->event->base.fence = fence; 1208 } 1209 1210 c++; 1211 } 1212 1213 for_each_new_connector_in_state(state, conn, conn_state, i) { 1214 struct drm_writeback_connector *wb_conn; 1215 struct drm_out_fence_state *f; 1216 struct dma_fence *fence; 1217 s32 __user *fence_ptr; 1218 1219 if (!conn_state->writeback_job) 1220 continue; 1221 1222 fence_ptr = get_out_fence_for_connector(state, conn); 1223 if (!fence_ptr) 1224 continue; 1225 1226 f = krealloc(*fence_state, sizeof(**fence_state) * 1227 (*num_fences + 1), GFP_KERNEL); 1228 if (!f) 1229 return -ENOMEM; 1230 1231 memset(&f[*num_fences], 0, sizeof(*f)); 1232 1233 f[*num_fences].out_fence_ptr = fence_ptr; 1234 *fence_state = f; 1235 1236 wb_conn = drm_connector_to_writeback(conn); 1237 fence = drm_writeback_get_out_fence(wb_conn); 1238 if (!fence) 1239 return -ENOMEM; 1240 1241 ret = setup_out_fence(&f[(*num_fences)++], fence); 1242 if (ret) { 1243 dma_fence_put(fence); 1244 return ret; 1245 } 1246 1247 conn_state->writeback_job->out_fence = fence; 1248 } 1249 1250 /* 1251 * Having this flag means user mode pends on event which will never 1252 * reach due to lack of at least one CRTC for signaling 1253 */ 1254 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) 1255 return -EINVAL; 1256 1257 return 0; 1258 } 1259 1260 static void complete_signaling(struct drm_device *dev, 1261 struct drm_atomic_state *state, 1262 struct drm_out_fence_state *fence_state, 1263 unsigned int num_fences, 1264 bool install_fds) 1265 { 1266 struct drm_crtc *crtc; 1267 struct drm_crtc_state *crtc_state; 1268 int i; 1269 1270 if (install_fds) { 1271 for (i = 0; i < num_fences; i++) 1272 fd_install(fence_state[i].fd, 1273 fence_state[i].sync_file->file); 1274 1275 kfree(fence_state); 1276 return; 1277 } 1278 1279 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1280 struct drm_pending_vblank_event *event = crtc_state->event; 1281 /* 1282 * Free the allocated event. drm_atomic_helper_setup_commit 1283 * can allocate an event too, so only free it if it's ours 1284 * to prevent a double free in drm_atomic_state_clear. 1285 */ 1286 if (event && (event->base.fence || event->base.file_priv)) { 1287 drm_event_cancel_free(dev, &event->base); 1288 crtc_state->event = NULL; 1289 } 1290 } 1291 1292 if (!fence_state) 1293 return; 1294 1295 for (i = 0; i < num_fences; i++) { 1296 if (fence_state[i].sync_file) 1297 fput(fence_state[i].sync_file->file); 1298 if (fence_state[i].fd >= 0) 1299 put_unused_fd(fence_state[i].fd); 1300 1301 /* If this fails log error to the user */ 1302 if (fence_state[i].out_fence_ptr && 1303 put_user(-1, fence_state[i].out_fence_ptr)) 1304 drm_dbg_atomic(dev, "Couldn't clear out_fence_ptr\n"); 1305 } 1306 1307 kfree(fence_state); 1308 } 1309 1310 int drm_mode_atomic_ioctl(struct drm_device *dev, 1311 void *data, struct drm_file *file_priv) 1312 { 1313 struct drm_mode_atomic *arg = data; 1314 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); 1315 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); 1316 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 1317 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); 1318 unsigned int copied_objs, copied_props; 1319 struct drm_atomic_state *state; 1320 struct drm_modeset_acquire_ctx ctx; 1321 struct drm_out_fence_state *fence_state; 1322 int ret = 0; 1323 unsigned int i, j, num_fences; 1324 1325 /* disallow for drivers not supporting atomic: */ 1326 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 1327 return -EOPNOTSUPP; 1328 1329 /* disallow for userspace that has not enabled atomic cap (even 1330 * though this may be a bit overkill, since legacy userspace 1331 * wouldn't know how to call this ioctl) 1332 */ 1333 if (!file_priv->atomic) { 1334 drm_dbg_atomic(dev, 1335 "commit failed: atomic cap not enabled\n"); 1336 return -EINVAL; 1337 } 1338 1339 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) { 1340 drm_dbg_atomic(dev, "commit failed: invalid flag\n"); 1341 return -EINVAL; 1342 } 1343 1344 if (arg->reserved) { 1345 drm_dbg_atomic(dev, "commit failed: reserved field set\n"); 1346 return -EINVAL; 1347 } 1348 1349 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) { 1350 drm_dbg_atomic(dev, 1351 "commit failed: invalid flag DRM_MODE_PAGE_FLIP_ASYNC\n"); 1352 return -EINVAL; 1353 } 1354 1355 /* can't test and expect an event at the same time. */ 1356 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && 1357 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { 1358 drm_dbg_atomic(dev, 1359 "commit failed: page-flip event requested with test-only commit\n"); 1360 return -EINVAL; 1361 } 1362 1363 state = drm_atomic_state_alloc(dev); 1364 if (!state) 1365 return -ENOMEM; 1366 1367 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); 1368 state->acquire_ctx = &ctx; 1369 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); 1370 1371 retry: 1372 copied_objs = 0; 1373 copied_props = 0; 1374 fence_state = NULL; 1375 num_fences = 0; 1376 1377 for (i = 0; i < arg->count_objs; i++) { 1378 uint32_t obj_id, count_props; 1379 struct drm_mode_object *obj; 1380 1381 if (get_user(obj_id, objs_ptr + copied_objs)) { 1382 ret = -EFAULT; 1383 goto out; 1384 } 1385 1386 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY); 1387 if (!obj) { 1388 ret = -ENOENT; 1389 goto out; 1390 } 1391 1392 if (!obj->properties) { 1393 drm_mode_object_put(obj); 1394 ret = -ENOENT; 1395 goto out; 1396 } 1397 1398 if (get_user(count_props, count_props_ptr + copied_objs)) { 1399 drm_mode_object_put(obj); 1400 ret = -EFAULT; 1401 goto out; 1402 } 1403 1404 copied_objs++; 1405 1406 for (j = 0; j < count_props; j++) { 1407 uint32_t prop_id; 1408 uint64_t prop_value; 1409 struct drm_property *prop; 1410 1411 if (get_user(prop_id, props_ptr + copied_props)) { 1412 drm_mode_object_put(obj); 1413 ret = -EFAULT; 1414 goto out; 1415 } 1416 1417 prop = drm_mode_obj_find_prop_id(obj, prop_id); 1418 if (!prop) { 1419 drm_mode_object_put(obj); 1420 ret = -ENOENT; 1421 goto out; 1422 } 1423 1424 if (copy_from_user(&prop_value, 1425 prop_values_ptr + copied_props, 1426 sizeof(prop_value))) { 1427 drm_mode_object_put(obj); 1428 ret = -EFAULT; 1429 goto out; 1430 } 1431 1432 ret = drm_atomic_set_property(state, file_priv, 1433 obj, prop, prop_value); 1434 if (ret) { 1435 drm_mode_object_put(obj); 1436 goto out; 1437 } 1438 1439 copied_props++; 1440 } 1441 1442 drm_mode_object_put(obj); 1443 } 1444 1445 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, 1446 &num_fences); 1447 if (ret) 1448 goto out; 1449 1450 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { 1451 ret = drm_atomic_check_only(state); 1452 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { 1453 ret = drm_atomic_nonblocking_commit(state); 1454 } else { 1455 if (drm_debug_enabled(DRM_UT_STATE)) 1456 drm_atomic_print_state(state); 1457 1458 ret = drm_atomic_commit(state); 1459 } 1460 1461 out: 1462 complete_signaling(dev, state, fence_state, num_fences, !ret); 1463 1464 if (ret == -EDEADLK) { 1465 drm_atomic_state_clear(state); 1466 ret = drm_modeset_backoff(&ctx); 1467 if (!ret) 1468 goto retry; 1469 } 1470 1471 drm_atomic_state_put(state); 1472 1473 drm_modeset_drop_locks(&ctx); 1474 drm_modeset_acquire_fini(&ctx); 1475 1476 return ret; 1477 } 1478