1/* 2 * Copyright (C) 2014 Red Hat 3 * Copyright (C) 2014 Intel Corp. 4 * Copyright (C) 2018 Intel Corp. 5 * Copyright (c) 2020, The Linux Foundation. All rights reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 * OTHER DEALINGS IN THE SOFTWARE. 24 * 25 * Authors: 26 * Rob Clark <robdclark@gmail.com> 27 * Daniel Vetter <daniel.vetter@ffwll.ch> 28 */ 29 30#include <drm/drm_atomic_uapi.h> 31#include <drm/drm_atomic.h> 32#include <drm/drm_framebuffer.h> 33#include <drm/drm_print.h> 34#include <drm/drm_drv.h> 35#include <drm/drm_writeback.h> 36#include <drm/drm_vblank.h> 37 38#include <linux/dma-fence.h> 39#include <linux/uaccess.h> 40#include <linux/sync_file.h> 41#include <linux/file.h> 42 43#include "drm_crtc_internal.h" 44 45/** 46 * DOC: overview 47 * 48 * This file contains the marshalling and demarshalling glue for the atomic UAPI 49 * in all its forms: The monster ATOMIC IOCTL itself, code for GET_PROPERTY and 50 * SET_PROPERTY IOCTLs. Plus interface functions for compatibility helpers and 51 * drivers which have special needs to construct their own atomic updates, e.g. 52 * for load detect or similar. 53 */ 54 55/** 56 * drm_atomic_set_mode_for_crtc - set mode for CRTC 57 * @state: the CRTC whose incoming state to update 58 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable 59 * 60 * Set a mode (originating from the kernel) on the desired CRTC state and update 61 * the enable property. 62 * 63 * RETURNS: 64 * Zero on success, error code on failure. Cannot return -EDEADLK. 65 */ 66int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state, 67 const struct drm_display_mode *mode) 68{ 69 struct drm_crtc *crtc = state->crtc; 70 struct drm_mode_modeinfo umode; 71 72 /* Early return for no change. */ 73 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0) 74 return 0; 75 76 drm_property_blob_put(state->mode_blob); 77 state->mode_blob = NULL; 78 79 if (mode) { 80 struct drm_property_blob *blob; 81 82 drm_mode_convert_to_umode(&umode, mode); 83 blob = drm_property_create_blob(crtc->dev, 84 sizeof(umode), &umode); 85 if (IS_ERR(blob)) 86 return PTR_ERR(blob); 87 88 drm_mode_copy(&state->mode, mode); 89 90 state->mode_blob = blob; 91 state->enable = true; 92 drm_dbg_atomic(crtc->dev, 93 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 94 mode->name, crtc->base.id, crtc->name, state); 95 } else { 96 memset(&state->mode, 0, sizeof(state->mode)); 97 state->enable = false; 98 drm_dbg_atomic(crtc->dev, 99 "Set [NOMODE] for [CRTC:%d:%s] state %p\n", 100 crtc->base.id, crtc->name, state); 101 } 102 103 return 0; 104} 105EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc); 106 107/** 108 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC 109 * @state: the CRTC whose incoming state to update 110 * @blob: pointer to blob property to use for mode 111 * 112 * Set a mode (originating from a blob property) on the desired CRTC state. 113 * This function will take a reference on the blob property for the CRTC state, 114 * and release the reference held on the state's existing mode property, if any 115 * was set. 116 * 117 * RETURNS: 118 * Zero on success, error code on failure. Cannot return -EDEADLK. 119 */ 120int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, 121 struct drm_property_blob *blob) 122{ 123 struct drm_crtc *crtc = state->crtc; 124 125 if (blob == state->mode_blob) 126 return 0; 127 128 drm_property_blob_put(state->mode_blob); 129 state->mode_blob = NULL; 130 131 memset(&state->mode, 0, sizeof(state->mode)); 132 133 if (blob) { 134 int ret; 135 136 if (blob->length != sizeof(struct drm_mode_modeinfo)) { 137 drm_dbg_atomic(crtc->dev, 138 "[CRTC:%d:%s] bad mode blob length: %zu\n", 139 crtc->base.id, crtc->name, 140 blob->length); 141 return -EINVAL; 142 } 143 144 ret = drm_mode_convert_umode(crtc->dev, 145 &state->mode, blob->data); 146 if (ret) { 147 drm_dbg_atomic(crtc->dev, 148 "[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n", 149 crtc->base.id, crtc->name, 150 ret, drm_get_mode_status_name(state->mode.status)); 151 drm_mode_debug_printmodeline(&state->mode); 152 return -EINVAL; 153 } 154 155 state->mode_blob = drm_property_blob_get(blob); 156 state->enable = true; 157 drm_dbg_atomic(crtc->dev, 158 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 159 state->mode.name, crtc->base.id, crtc->name, 160 state); 161 } else { 162 state->enable = false; 163 drm_dbg_atomic(crtc->dev, 164 "Set [NOMODE] for [CRTC:%d:%s] state %p\n", 165 crtc->base.id, crtc->name, state); 166 } 167 168 return 0; 169} 170EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); 171 172/** 173 * drm_atomic_set_crtc_for_plane - set CRTC for plane 174 * @plane_state: the plane whose incoming state to update 175 * @crtc: CRTC to use for the plane 176 * 177 * Changing the assigned CRTC for a plane requires us to grab the lock and state 178 * for the new CRTC, as needed. This function takes care of all these details 179 * besides updating the pointer in the state object itself. 180 * 181 * Returns: 182 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 183 * then the w/w mutex code has detected a deadlock and the entire atomic 184 * sequence must be restarted. All other errors are fatal. 185 */ 186int 187drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, 188 struct drm_crtc *crtc) 189{ 190 struct drm_plane *plane = plane_state->plane; 191 struct drm_crtc_state *crtc_state; 192 /* Nothing to do for same crtc*/ 193 if (plane_state->crtc == crtc) 194 return 0; 195 if (plane_state->crtc) { 196 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 197 plane_state->crtc); 198 if (WARN_ON(IS_ERR(crtc_state))) 199 return PTR_ERR(crtc_state); 200 201 crtc_state->plane_mask &= ~drm_plane_mask(plane); 202 } 203 204 plane_state->crtc = crtc; 205 206 if (crtc) { 207 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 208 crtc); 209 if (IS_ERR(crtc_state)) 210 return PTR_ERR(crtc_state); 211 crtc_state->plane_mask |= drm_plane_mask(plane); 212 } 213 214 if (crtc) 215 drm_dbg_atomic(plane->dev, 216 "Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n", 217 plane->base.id, plane->name, plane_state, 218 crtc->base.id, crtc->name); 219 else 220 drm_dbg_atomic(plane->dev, 221 "Link [PLANE:%d:%s] state %p to [NOCRTC]\n", 222 plane->base.id, plane->name, plane_state); 223 224 return 0; 225} 226EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane); 227 228/** 229 * drm_atomic_set_fb_for_plane - set framebuffer for plane 230 * @plane_state: atomic state object for the plane 231 * @fb: fb to use for the plane 232 * 233 * Changing the assigned framebuffer for a plane requires us to grab a reference 234 * to the new fb and drop the reference to the old fb, if there is one. This 235 * function takes care of all these details besides updating the pointer in the 236 * state object itself. 237 */ 238void 239drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, 240 struct drm_framebuffer *fb) 241{ 242 struct drm_plane *plane = plane_state->plane; 243 244 if (fb) 245 drm_dbg_atomic(plane->dev, 246 "Set [FB:%d] for [PLANE:%d:%s] state %p\n", 247 fb->base.id, plane->base.id, plane->name, 248 plane_state); 249 else 250 drm_dbg_atomic(plane->dev, 251 "Set [NOFB] for [PLANE:%d:%s] state %p\n", 252 plane->base.id, plane->name, plane_state); 253 254 drm_framebuffer_assign(&plane_state->fb, fb); 255} 256EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); 257 258/** 259 * drm_atomic_set_crtc_for_connector - set CRTC for connector 260 * @conn_state: atomic state object for the connector 261 * @crtc: CRTC to use for the connector 262 * 263 * Changing the assigned CRTC for a connector requires us to grab the lock and 264 * state for the new CRTC, as needed. This function takes care of all these 265 * details besides updating the pointer in the state object itself. 266 * 267 * Returns: 268 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 269 * then the w/w mutex code has detected a deadlock and the entire atomic 270 * sequence must be restarted. All other errors are fatal. 271 */ 272int 273drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, 274 struct drm_crtc *crtc) 275{ 276 struct drm_connector *connector = conn_state->connector; 277 struct drm_crtc_state *crtc_state; 278 279 if (conn_state->crtc == crtc) 280 return 0; 281 282 if (conn_state->crtc) { 283 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state, 284 conn_state->crtc); 285 286 crtc_state->connector_mask &= 287 ~drm_connector_mask(conn_state->connector); 288 289 drm_connector_put(conn_state->connector); 290 conn_state->crtc = NULL; 291 } 292 293 if (crtc) { 294 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); 295 if (IS_ERR(crtc_state)) 296 return PTR_ERR(crtc_state); 297 298 crtc_state->connector_mask |= 299 drm_connector_mask(conn_state->connector); 300 301 drm_connector_get(conn_state->connector); 302 conn_state->crtc = crtc; 303 304 drm_dbg_atomic(connector->dev, 305 "Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n", 306 connector->base.id, connector->name, 307 conn_state, crtc->base.id, crtc->name); 308 } else { 309 drm_dbg_atomic(connector->dev, 310 "Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n", 311 connector->base.id, connector->name, 312 conn_state); 313 } 314 315 return 0; 316} 317EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); 318 319static void set_out_fence_for_crtc(struct drm_atomic_state *state, 320 struct drm_crtc *crtc, s32 __user *fence_ptr) 321{ 322 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; 323} 324 325static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state, 326 struct drm_crtc *crtc) 327{ 328 s32 __user *fence_ptr; 329 330 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; 331 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; 332 333 return fence_ptr; 334} 335 336static int set_out_fence_for_connector(struct drm_atomic_state *state, 337 struct drm_connector *connector, 338 s32 __user *fence_ptr) 339{ 340 unsigned int index = drm_connector_index(connector); 341 342 if (!fence_ptr) 343 return 0; 344 345 if (put_user(-1, fence_ptr)) 346 return -EFAULT; 347 348 state->connectors[index].out_fence_ptr = fence_ptr; 349 350 return 0; 351} 352 353static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state, 354 struct drm_connector *connector) 355{ 356 unsigned int index = drm_connector_index(connector); 357 s32 __user *fence_ptr; 358 359 fence_ptr = state->connectors[index].out_fence_ptr; 360 state->connectors[index].out_fence_ptr = NULL; 361 362 return fence_ptr; 363} 364 365static int 366drm_atomic_replace_property_blob_from_id(struct drm_device *dev, 367 struct drm_property_blob **blob, 368 uint64_t blob_id, 369 ssize_t expected_size, 370 ssize_t expected_elem_size, 371 bool *replaced) 372{ 373 struct drm_property_blob *new_blob = NULL; 374 375 if (blob_id != 0) { 376 new_blob = drm_property_lookup_blob(dev, blob_id); 377 if (new_blob == NULL) { 378 drm_dbg_atomic(dev, 379 "cannot find blob ID %llu\n", blob_id); 380 return -EINVAL; 381 } 382 383 if (expected_size > 0 && 384 new_blob->length != expected_size) { 385 drm_dbg_atomic(dev, 386 "[BLOB:%d] length %zu different from expected %zu\n", 387 new_blob->base.id, new_blob->length, expected_size); 388 drm_property_blob_put(new_blob); 389 return -EINVAL; 390 } 391 if (expected_elem_size > 0 && 392 new_blob->length % expected_elem_size != 0) { 393 drm_dbg_atomic(dev, 394 "[BLOB:%d] length %zu not divisible by element size %zu\n", 395 new_blob->base.id, new_blob->length, expected_elem_size); 396 drm_property_blob_put(new_blob); 397 return -EINVAL; 398 } 399 } 400 401 *replaced |= drm_property_replace_blob(blob, new_blob); 402 drm_property_blob_put(new_blob); 403 404 return 0; 405} 406 407static int drm_atomic_crtc_set_property(struct drm_crtc *crtc, 408 struct drm_crtc_state *state, struct drm_property *property, 409 uint64_t val) 410{ 411 struct drm_device *dev = crtc->dev; 412 struct drm_mode_config *config = &dev->mode_config; 413 bool replaced = false; 414 int ret; 415 416 if (property == config->prop_active) 417 state->active = val; 418 else if (property == config->prop_mode_id) { 419 struct drm_property_blob *mode = 420 drm_property_lookup_blob(dev, val); 421 ret = drm_atomic_set_mode_prop_for_crtc(state, mode); 422 drm_property_blob_put(mode); 423 return ret; 424 } else if (property == config->prop_vrr_enabled) { 425 state->vrr_enabled = val; 426 } else if (property == config->degamma_lut_property) { 427 ret = drm_atomic_replace_property_blob_from_id(dev, 428 &state->degamma_lut, 429 val, 430 -1, sizeof(struct drm_color_lut), 431 &replaced); 432 state->color_mgmt_changed |= replaced; 433 return ret; 434 } else if (property == config->ctm_property) { 435 ret = drm_atomic_replace_property_blob_from_id(dev, 436 &state->ctm, 437 val, 438 sizeof(struct drm_color_ctm), -1, 439 &replaced); 440 state->color_mgmt_changed |= replaced; 441 return ret; 442 } else if (property == config->gamma_lut_property) { 443 ret = drm_atomic_replace_property_blob_from_id(dev, 444 &state->gamma_lut, 445 val, 446 -1, sizeof(struct drm_color_lut), 447 &replaced); 448 state->color_mgmt_changed |= replaced; 449 return ret; 450 } else if (property == config->prop_out_fence_ptr) { 451 s32 __user *fence_ptr = u64_to_user_ptr(val); 452 453 if (!fence_ptr) 454 return 0; 455 456 if (put_user(-1, fence_ptr)) 457 return -EFAULT; 458 459 set_out_fence_for_crtc(state->state, crtc, fence_ptr); 460 } else if (property == crtc->scaling_filter_property) { 461 state->scaling_filter = val; 462 } else if (crtc->funcs->atomic_set_property) { 463 return crtc->funcs->atomic_set_property(crtc, state, property, val); 464 } else { 465 drm_dbg_atomic(crtc->dev, 466 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n", 467 crtc->base.id, crtc->name, 468 property->base.id, property->name); 469 return -EINVAL; 470 } 471 472 return 0; 473} 474 475static int 476drm_atomic_crtc_get_property(struct drm_crtc *crtc, 477 const struct drm_crtc_state *state, 478 struct drm_property *property, uint64_t *val) 479{ 480 struct drm_device *dev = crtc->dev; 481 struct drm_mode_config *config = &dev->mode_config; 482 483 if (property == config->prop_active) 484 *val = drm_atomic_crtc_effectively_active(state); 485 else if (property == config->prop_mode_id) 486 *val = (state->mode_blob) ? state->mode_blob->base.id : 0; 487 else if (property == config->prop_vrr_enabled) 488 *val = state->vrr_enabled; 489 else if (property == config->degamma_lut_property) 490 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; 491 else if (property == config->ctm_property) 492 *val = (state->ctm) ? state->ctm->base.id : 0; 493 else if (property == config->gamma_lut_property) 494 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; 495 else if (property == config->prop_out_fence_ptr) 496 *val = 0; 497 else if (property == crtc->scaling_filter_property) 498 *val = state->scaling_filter; 499 else if (crtc->funcs->atomic_get_property) 500 return crtc->funcs->atomic_get_property(crtc, state, property, val); 501 else { 502 drm_dbg_atomic(dev, 503 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n", 504 crtc->base.id, crtc->name, 505 property->base.id, property->name); 506 return -EINVAL; 507 } 508 509 return 0; 510} 511 512static int drm_atomic_plane_set_property(struct drm_plane *plane, 513 struct drm_plane_state *state, struct drm_file *file_priv, 514 struct drm_property *property, uint64_t val) 515{ 516 struct drm_device *dev = plane->dev; 517 struct drm_mode_config *config = &dev->mode_config; 518 bool replaced = false; 519 int ret; 520 521 if (property == config->prop_fb_id) { 522 struct drm_framebuffer *fb; 523 524 fb = drm_framebuffer_lookup(dev, file_priv, val); 525 drm_atomic_set_fb_for_plane(state, fb); 526 if (fb) 527 drm_framebuffer_put(fb); 528 } else if (property == config->prop_in_fence_fd) { 529 if (state->fence) 530 return -EINVAL; 531 532 if (U642I64(val) == -1) 533 return 0; 534 535 state->fence = sync_file_get_fence(val); 536 if (!state->fence) 537 return -EINVAL; 538 539 } else if (property == config->prop_crtc_id) { 540 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 541 542 if (val && !crtc) { 543 drm_dbg_atomic(dev, 544 "[PROP:%d:%s] cannot find CRTC with ID %llu\n", 545 property->base.id, property->name, val); 546 return -EACCES; 547 } 548 return drm_atomic_set_crtc_for_plane(state, crtc); 549 } else if (property == config->prop_crtc_x) { 550 state->crtc_x = U642I64(val); 551 } else if (property == config->prop_crtc_y) { 552 state->crtc_y = U642I64(val); 553 } else if (property == config->prop_crtc_w) { 554 state->crtc_w = val; 555 } else if (property == config->prop_crtc_h) { 556 state->crtc_h = val; 557 } else if (property == config->prop_src_x) { 558 state->src_x = val; 559 } else if (property == config->prop_src_y) { 560 state->src_y = val; 561 } else if (property == config->prop_src_w) { 562 state->src_w = val; 563 } else if (property == config->prop_src_h) { 564 state->src_h = val; 565 } else if (property == plane->alpha_property) { 566 state->alpha = val; 567 } else if (property == plane->blend_mode_property) { 568 state->pixel_blend_mode = val; 569 } else if (property == plane->rotation_property) { 570 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) { 571 drm_dbg_atomic(plane->dev, 572 "[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n", 573 plane->base.id, plane->name, val); 574 return -EINVAL; 575 } 576 state->rotation = val; 577 } else if (property == plane->zpos_property) { 578 state->zpos = val; 579 } else if (property == plane->color_encoding_property) { 580 state->color_encoding = val; 581 } else if (property == plane->color_range_property) { 582 state->color_range = val; 583 } else if (property == config->prop_fb_damage_clips) { 584 ret = drm_atomic_replace_property_blob_from_id(dev, 585 &state->fb_damage_clips, 586 val, 587 -1, 588 sizeof(struct drm_rect), 589 &replaced); 590 return ret; 591 } else if (property == plane->scaling_filter_property) { 592 state->scaling_filter = val; 593 } else if (plane->funcs->atomic_set_property) { 594 return plane->funcs->atomic_set_property(plane, state, 595 property, val); 596 } else { 597 drm_dbg_atomic(plane->dev, 598 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n", 599 plane->base.id, plane->name, 600 property->base.id, property->name); 601 return -EINVAL; 602 } 603 604 return 0; 605} 606 607static int 608drm_atomic_plane_get_property(struct drm_plane *plane, 609 const struct drm_plane_state *state, 610 struct drm_property *property, uint64_t *val) 611{ 612 struct drm_device *dev = plane->dev; 613 struct drm_mode_config *config = &dev->mode_config; 614 615 if (property == config->prop_fb_id) { 616 *val = (state->fb) ? state->fb->base.id : 0; 617 } else if (property == config->prop_in_fence_fd) { 618 *val = -1; 619 } else if (property == config->prop_crtc_id) { 620 *val = (state->crtc) ? state->crtc->base.id : 0; 621 } else if (property == config->prop_crtc_x) { 622 *val = I642U64(state->crtc_x); 623 } else if (property == config->prop_crtc_y) { 624 *val = I642U64(state->crtc_y); 625 } else if (property == config->prop_crtc_w) { 626 *val = state->crtc_w; 627 } else if (property == config->prop_crtc_h) { 628 *val = state->crtc_h; 629 } else if (property == config->prop_src_x) { 630 *val = state->src_x; 631 } else if (property == config->prop_src_y) { 632 *val = state->src_y; 633 } else if (property == config->prop_src_w) { 634 *val = state->src_w; 635 } else if (property == config->prop_src_h) { 636 *val = state->src_h; 637 } else if (property == plane->alpha_property) { 638 *val = state->alpha; 639 } else if (property == plane->blend_mode_property) { 640 *val = state->pixel_blend_mode; 641 } else if (property == plane->rotation_property) { 642 *val = state->rotation; 643 } else if (property == plane->zpos_property) { 644 *val = state->zpos; 645 } else if (property == plane->color_encoding_property) { 646 *val = state->color_encoding; 647 } else if (property == plane->color_range_property) { 648 *val = state->color_range; 649 } else if (property == config->prop_fb_damage_clips) { 650 *val = (state->fb_damage_clips) ? 651 state->fb_damage_clips->base.id : 0; 652 } else if (property == plane->scaling_filter_property) { 653 *val = state->scaling_filter; 654 } else if (plane->funcs->atomic_get_property) { 655 return plane->funcs->atomic_get_property(plane, state, property, val); 656 } else { 657 drm_dbg_atomic(dev, 658 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n", 659 plane->base.id, plane->name, 660 property->base.id, property->name); 661 return -EINVAL; 662 } 663 664 return 0; 665} 666 667static int drm_atomic_set_writeback_fb_for_connector( 668 struct drm_connector_state *conn_state, 669 struct drm_framebuffer *fb) 670{ 671 int ret; 672 struct drm_connector *conn = conn_state->connector; 673 674 ret = drm_writeback_set_fb(conn_state, fb); 675 if (ret < 0) 676 return ret; 677 678 if (fb) 679 drm_dbg_atomic(conn->dev, 680 "Set [FB:%d] for connector state %p\n", 681 fb->base.id, conn_state); 682 else 683 drm_dbg_atomic(conn->dev, 684 "Set [NOFB] for connector state %p\n", 685 conn_state); 686 687 return 0; 688} 689 690static int drm_atomic_connector_set_property(struct drm_connector *connector, 691 struct drm_connector_state *state, struct drm_file *file_priv, 692 struct drm_property *property, uint64_t val) 693{ 694 struct drm_device *dev = connector->dev; 695 struct drm_mode_config *config = &dev->mode_config; 696 bool replaced = false; 697 int ret; 698 699 if (property == config->prop_crtc_id) { 700 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 701 702 if (val && !crtc) { 703 drm_dbg_atomic(dev, 704 "[PROP:%d:%s] cannot find CRTC with ID %llu\n", 705 property->base.id, property->name, val); 706 return -EACCES; 707 } 708 return drm_atomic_set_crtc_for_connector(state, crtc); 709 } else if (property == config->dpms_property) { 710 /* setting DPMS property requires special handling, which 711 * is done in legacy setprop path for us. Disallow (for 712 * now?) atomic writes to DPMS property: 713 */ 714 drm_dbg_atomic(dev, 715 "legacy [PROP:%d:%s] can only be set via legacy uAPI\n", 716 property->base.id, property->name); 717 return -EINVAL; 718 } else if (property == config->tv_select_subconnector_property) { 719 state->tv.select_subconnector = val; 720 } else if (property == config->tv_subconnector_property) { 721 state->tv.subconnector = val; 722 } else if (property == config->tv_left_margin_property) { 723 state->tv.margins.left = val; 724 } else if (property == config->tv_right_margin_property) { 725 state->tv.margins.right = val; 726 } else if (property == config->tv_top_margin_property) { 727 state->tv.margins.top = val; 728 } else if (property == config->tv_bottom_margin_property) { 729 state->tv.margins.bottom = val; 730 } else if (property == config->legacy_tv_mode_property) { 731 state->tv.legacy_mode = 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 accidentally 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_dbg_kms(dev, "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 (property == connector->privacy_screen_sw_state_property) { 800 state->privacy_screen_sw_state = val; 801 } else if (connector->funcs->atomic_set_property) { 802 return connector->funcs->atomic_set_property(connector, 803 state, property, val); 804 } else { 805 drm_dbg_atomic(connector->dev, 806 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n", 807 connector->base.id, connector->name, 808 property->base.id, property->name); 809 return -EINVAL; 810 } 811 812 return 0; 813} 814 815static int 816drm_atomic_connector_get_property(struct drm_connector *connector, 817 const struct drm_connector_state *state, 818 struct drm_property *property, uint64_t *val) 819{ 820 struct drm_device *dev = connector->dev; 821 struct drm_mode_config *config = &dev->mode_config; 822 823 if (property == config->prop_crtc_id) { 824 *val = (state->crtc) ? state->crtc->base.id : 0; 825 } else if (property == config->dpms_property) { 826 if (state->crtc && state->crtc->state->self_refresh_active) 827 *val = DRM_MODE_DPMS_ON; 828 else 829 *val = connector->dpms; 830 } else if (property == config->tv_select_subconnector_property) { 831 *val = state->tv.select_subconnector; 832 } else if (property == config->tv_subconnector_property) { 833 *val = state->tv.subconnector; 834 } else if (property == config->tv_left_margin_property) { 835 *val = state->tv.margins.left; 836 } else if (property == config->tv_right_margin_property) { 837 *val = state->tv.margins.right; 838 } else if (property == config->tv_top_margin_property) { 839 *val = state->tv.margins.top; 840 } else if (property == config->tv_bottom_margin_property) { 841 *val = state->tv.margins.bottom; 842 } else if (property == config->legacy_tv_mode_property) { 843 *val = state->tv.legacy_mode; 844 } else if (property == config->tv_mode_property) { 845 *val = state->tv.mode; 846 } else if (property == config->tv_brightness_property) { 847 *val = state->tv.brightness; 848 } else if (property == config->tv_contrast_property) { 849 *val = state->tv.contrast; 850 } else if (property == config->tv_flicker_reduction_property) { 851 *val = state->tv.flicker_reduction; 852 } else if (property == config->tv_overscan_property) { 853 *val = state->tv.overscan; 854 } else if (property == config->tv_saturation_property) { 855 *val = state->tv.saturation; 856 } else if (property == config->tv_hue_property) { 857 *val = state->tv.hue; 858 } else if (property == config->link_status_property) { 859 *val = state->link_status; 860 } else if (property == config->aspect_ratio_property) { 861 *val = state->picture_aspect_ratio; 862 } else if (property == config->content_type_property) { 863 *val = state->content_type; 864 } else if (property == connector->colorspace_property) { 865 *val = state->colorspace; 866 } else if (property == connector->scaling_mode_property) { 867 *val = state->scaling_mode; 868 } else if (property == config->hdr_output_metadata_property) { 869 *val = state->hdr_output_metadata ? 870 state->hdr_output_metadata->base.id : 0; 871 } else if (property == config->content_protection_property) { 872 *val = state->content_protection; 873 } else if (property == config->hdcp_content_type_property) { 874 *val = state->hdcp_content_type; 875 } else if (property == config->writeback_fb_id_property) { 876 /* Writeback framebuffer is one-shot, write and forget */ 877 *val = 0; 878 } else if (property == config->writeback_out_fence_ptr_property) { 879 *val = 0; 880 } else if (property == connector->max_bpc_property) { 881 *val = state->max_requested_bpc; 882 } else if (property == connector->privacy_screen_sw_state_property) { 883 *val = state->privacy_screen_sw_state; 884 } else if (connector->funcs->atomic_get_property) { 885 return connector->funcs->atomic_get_property(connector, 886 state, property, val); 887 } else { 888 drm_dbg_atomic(dev, 889 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n", 890 connector->base.id, connector->name, 891 property->base.id, property->name); 892 return -EINVAL; 893 } 894 895 return 0; 896} 897 898int drm_atomic_get_property(struct drm_mode_object *obj, 899 struct drm_property *property, uint64_t *val) 900{ 901 struct drm_device *dev = property->dev; 902 int ret; 903 904 switch (obj->type) { 905 case DRM_MODE_OBJECT_CONNECTOR: { 906 struct drm_connector *connector = obj_to_connector(obj); 907 908 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 909 ret = drm_atomic_connector_get_property(connector, 910 connector->state, property, val); 911 break; 912 } 913 case DRM_MODE_OBJECT_CRTC: { 914 struct drm_crtc *crtc = obj_to_crtc(obj); 915 916 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 917 ret = drm_atomic_crtc_get_property(crtc, 918 crtc->state, property, val); 919 break; 920 } 921 case DRM_MODE_OBJECT_PLANE: { 922 struct drm_plane *plane = obj_to_plane(obj); 923 924 WARN_ON(!drm_modeset_is_locked(&plane->mutex)); 925 ret = drm_atomic_plane_get_property(plane, 926 plane->state, property, val); 927 break; 928 } 929 default: 930 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties\n", obj->id); 931 ret = -EINVAL; 932 break; 933 } 934 935 return ret; 936} 937 938/* 939 * The big monster ioctl 940 */ 941 942static struct drm_pending_vblank_event *create_vblank_event( 943 struct drm_crtc *crtc, uint64_t user_data) 944{ 945 struct drm_pending_vblank_event *e = NULL; 946 947 e = kzalloc(sizeof *e, GFP_KERNEL); 948 if (!e) 949 return NULL; 950 951 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 952 e->event.base.length = sizeof(e->event); 953 e->event.vbl.crtc_id = crtc->base.id; 954 e->event.vbl.user_data = user_data; 955 956 return e; 957} 958 959int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state, 960 struct drm_connector *connector, 961 int mode) 962{ 963 struct drm_connector *tmp_connector; 964 struct drm_connector_state *new_conn_state; 965 struct drm_crtc *crtc; 966 struct drm_crtc_state *crtc_state; 967 int i, ret, old_mode = connector->dpms; 968 bool active = false; 969 970 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, 971 state->acquire_ctx); 972 if (ret) 973 return ret; 974 975 if (mode != DRM_MODE_DPMS_ON) 976 mode = DRM_MODE_DPMS_OFF; 977 connector->dpms = mode; 978 979 crtc = connector->state->crtc; 980 if (!crtc) 981 goto out; 982 ret = drm_atomic_add_affected_connectors(state, crtc); 983 if (ret) 984 goto out; 985 986 crtc_state = drm_atomic_get_crtc_state(state, crtc); 987 if (IS_ERR(crtc_state)) { 988 ret = PTR_ERR(crtc_state); 989 goto out; 990 } 991 992 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) { 993 if (new_conn_state->crtc != crtc) 994 continue; 995 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { 996 active = true; 997 break; 998 } 999 } 1000 1001 crtc_state->active = active; 1002 ret = drm_atomic_commit(state); 1003out: 1004 if (ret != 0) 1005 connector->dpms = old_mode; 1006 return ret; 1007} 1008 1009int drm_atomic_set_property(struct drm_atomic_state *state, 1010 struct drm_file *file_priv, 1011 struct drm_mode_object *obj, 1012 struct drm_property *prop, 1013 uint64_t prop_value) 1014{ 1015 struct drm_mode_object *ref; 1016 int ret; 1017 1018 if (!drm_property_change_valid_get(prop, prop_value, &ref)) 1019 return -EINVAL; 1020 1021 switch (obj->type) { 1022 case DRM_MODE_OBJECT_CONNECTOR: { 1023 struct drm_connector *connector = obj_to_connector(obj); 1024 struct drm_connector_state *connector_state; 1025 1026 connector_state = drm_atomic_get_connector_state(state, connector); 1027 if (IS_ERR(connector_state)) { 1028 ret = PTR_ERR(connector_state); 1029 break; 1030 } 1031 1032 ret = drm_atomic_connector_set_property(connector, 1033 connector_state, file_priv, 1034 prop, prop_value); 1035 break; 1036 } 1037 case DRM_MODE_OBJECT_CRTC: { 1038 struct drm_crtc *crtc = obj_to_crtc(obj); 1039 struct drm_crtc_state *crtc_state; 1040 1041 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1042 if (IS_ERR(crtc_state)) { 1043 ret = PTR_ERR(crtc_state); 1044 break; 1045 } 1046 1047 ret = drm_atomic_crtc_set_property(crtc, 1048 crtc_state, prop, prop_value); 1049 break; 1050 } 1051 case DRM_MODE_OBJECT_PLANE: { 1052 struct drm_plane *plane = obj_to_plane(obj); 1053 struct drm_plane_state *plane_state; 1054 1055 plane_state = drm_atomic_get_plane_state(state, plane); 1056 if (IS_ERR(plane_state)) { 1057 ret = PTR_ERR(plane_state); 1058 break; 1059 } 1060 1061 ret = drm_atomic_plane_set_property(plane, 1062 plane_state, file_priv, 1063 prop, prop_value); 1064 break; 1065 } 1066 default: 1067 drm_dbg_atomic(prop->dev, "[OBJECT:%d] has no properties\n", obj->id); 1068 ret = -EINVAL; 1069 break; 1070 } 1071 1072 drm_property_change_valid_put(prop, ref); 1073 return ret; 1074} 1075 1076/** 1077 * DOC: explicit fencing properties 1078 * 1079 * Explicit fencing allows userspace to control the buffer synchronization 1080 * between devices. A Fence or a group of fences are transferred to/from 1081 * userspace using Sync File fds and there are two DRM properties for that. 1082 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and 1083 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. 1084 * 1085 * As a contrast, with implicit fencing the kernel keeps track of any 1086 * ongoing rendering, and automatically ensures that the atomic update waits 1087 * for any pending rendering to complete. This is usually tracked in &struct 1088 * dma_resv which can also contain mandatory kernel fences. Implicit syncing 1089 * is how Linux traditionally worked (e.g. DRI2/3 on X.org), whereas explicit 1090 * fencing is what Android wants. 1091 * 1092 * "IN_FENCE_FD”: 1093 * Use this property to pass a fence that DRM should wait on before 1094 * proceeding with the Atomic Commit request and show the framebuffer for 1095 * the plane on the screen. The fence can be either a normal fence or a 1096 * merged one, the sync_file framework will handle both cases and use a 1097 * fence_array if a merged fence is received. Passing -1 here means no 1098 * fences to wait on. 1099 * 1100 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag 1101 * it will only check if the Sync File is a valid one. 1102 * 1103 * On the driver side the fence is stored on the @fence parameter of 1104 * &struct drm_plane_state. Drivers which also support implicit fencing 1105 * should extract the implicit fence using drm_gem_plane_helper_prepare_fb(), 1106 * to make sure there's consistent behaviour between drivers in precedence 1107 * of implicit vs. explicit fencing. 1108 * 1109 * "OUT_FENCE_PTR”: 1110 * Use this property to pass a file descriptor pointer to DRM. Once the 1111 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with 1112 * the file descriptor number of a Sync File. This Sync File contains the 1113 * CRTC fence that will be signaled when all framebuffers present on the 1114 * Atomic Commit * request for that given CRTC are scanned out on the 1115 * screen. 1116 * 1117 * The Atomic Commit request fails if a invalid pointer is passed. If the 1118 * Atomic Commit request fails for any other reason the out fence fd 1119 * returned will be -1. On a Atomic Commit with the 1120 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. 1121 * 1122 * Note that out-fences don't have a special interface to drivers and are 1123 * internally represented by a &struct drm_pending_vblank_event in struct 1124 * &drm_crtc_state, which is also used by the nonblocking atomic commit 1125 * helpers and for the DRM event handling for existing userspace. 1126 */ 1127 1128struct drm_out_fence_state { 1129 s32 __user *out_fence_ptr; 1130 struct sync_file *sync_file; 1131 int fd; 1132}; 1133 1134static int setup_out_fence(struct drm_out_fence_state *fence_state, 1135 struct dma_fence *fence) 1136{ 1137 fence_state->fd = get_unused_fd_flags(O_CLOEXEC); 1138 if (fence_state->fd < 0) 1139 return fence_state->fd; 1140 1141 if (put_user(fence_state->fd, fence_state->out_fence_ptr)) 1142 return -EFAULT; 1143 1144 fence_state->sync_file = sync_file_create(fence); 1145 if (!fence_state->sync_file) 1146 return -ENOMEM; 1147 1148 return 0; 1149} 1150 1151static int prepare_signaling(struct drm_device *dev, 1152 struct drm_atomic_state *state, 1153 struct drm_mode_atomic *arg, 1154 struct drm_file *file_priv, 1155 struct drm_out_fence_state **fence_state, 1156 unsigned int *num_fences) 1157{ 1158 struct drm_crtc *crtc; 1159 struct drm_crtc_state *crtc_state; 1160 struct drm_connector *conn; 1161 struct drm_connector_state *conn_state; 1162 int i, c = 0, ret; 1163 1164 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) 1165 return 0; 1166 1167 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1168 s32 __user *fence_ptr; 1169 1170 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); 1171 1172 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { 1173 struct drm_pending_vblank_event *e; 1174 1175 e = create_vblank_event(crtc, arg->user_data); 1176 if (!e) 1177 return -ENOMEM; 1178 1179 crtc_state->event = e; 1180 } 1181 1182 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { 1183 struct drm_pending_vblank_event *e = crtc_state->event; 1184 1185 if (!file_priv) 1186 continue; 1187 1188 ret = drm_event_reserve_init(dev, file_priv, &e->base, 1189 &e->event.base); 1190 if (ret) { 1191 kfree(e); 1192 crtc_state->event = NULL; 1193 return ret; 1194 } 1195 } 1196 1197 if (fence_ptr) { 1198 struct dma_fence *fence; 1199 struct drm_out_fence_state *f; 1200 1201 f = krealloc(*fence_state, sizeof(**fence_state) * 1202 (*num_fences + 1), GFP_KERNEL); 1203 if (!f) 1204 return -ENOMEM; 1205 1206 memset(&f[*num_fences], 0, sizeof(*f)); 1207 1208 f[*num_fences].out_fence_ptr = fence_ptr; 1209 *fence_state = f; 1210 1211 fence = drm_crtc_create_fence(crtc); 1212 if (!fence) 1213 return -ENOMEM; 1214 1215 ret = setup_out_fence(&f[(*num_fences)++], fence); 1216 if (ret) { 1217 dma_fence_put(fence); 1218 return ret; 1219 } 1220 1221 crtc_state->event->base.fence = fence; 1222 } 1223 1224 c++; 1225 } 1226 1227 for_each_new_connector_in_state(state, conn, conn_state, i) { 1228 struct drm_writeback_connector *wb_conn; 1229 struct drm_out_fence_state *f; 1230 struct dma_fence *fence; 1231 s32 __user *fence_ptr; 1232 1233 if (!conn_state->writeback_job) 1234 continue; 1235 1236 fence_ptr = get_out_fence_for_connector(state, conn); 1237 if (!fence_ptr) 1238 continue; 1239 1240 f = krealloc(*fence_state, sizeof(**fence_state) * 1241 (*num_fences + 1), GFP_KERNEL); 1242 if (!f) 1243 return -ENOMEM; 1244 1245 memset(&f[*num_fences], 0, sizeof(*f)); 1246 1247 f[*num_fences].out_fence_ptr = fence_ptr; 1248 *fence_state = f; 1249 1250 wb_conn = drm_connector_to_writeback(conn); 1251 fence = drm_writeback_get_out_fence(wb_conn); 1252 if (!fence) 1253 return -ENOMEM; 1254 1255 ret = setup_out_fence(&f[(*num_fences)++], fence); 1256 if (ret) { 1257 dma_fence_put(fence); 1258 return ret; 1259 } 1260 1261 conn_state->writeback_job->out_fence = fence; 1262 } 1263 1264 /* 1265 * Having this flag means user mode pends on event which will never 1266 * reach due to lack of at least one CRTC for signaling 1267 */ 1268 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { 1269 drm_dbg_atomic(dev, "need at least one CRTC for DRM_MODE_PAGE_FLIP_EVENT"); 1270 return -EINVAL; 1271 } 1272 1273 return 0; 1274} 1275 1276static void complete_signaling(struct drm_device *dev, 1277 struct drm_atomic_state *state, 1278 struct drm_out_fence_state *fence_state, 1279 unsigned int num_fences, 1280 bool install_fds) 1281{ 1282 struct drm_crtc *crtc; 1283 struct drm_crtc_state *crtc_state; 1284 int i; 1285 1286 if (install_fds) { 1287 for (i = 0; i < num_fences; i++) 1288 fd_install(fence_state[i].fd, 1289 fence_state[i].sync_file->file); 1290 1291 kfree(fence_state); 1292 return; 1293 } 1294 1295 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1296 struct drm_pending_vblank_event *event = crtc_state->event; 1297 /* 1298 * Free the allocated event. drm_atomic_helper_setup_commit 1299 * can allocate an event too, so only free it if it's ours 1300 * to prevent a double free in drm_atomic_state_clear. 1301 */ 1302 if (event && (event->base.fence || event->base.file_priv)) { 1303 drm_event_cancel_free(dev, &event->base); 1304 crtc_state->event = NULL; 1305 } 1306 } 1307 1308 if (!fence_state) 1309 return; 1310 1311 for (i = 0; i < num_fences; i++) { 1312 if (fence_state[i].sync_file) 1313 fput(fence_state[i].sync_file->file); 1314 if (fence_state[i].fd >= 0) 1315 put_unused_fd(fence_state[i].fd); 1316 1317 /* If this fails log error to the user */ 1318 if (fence_state[i].out_fence_ptr && 1319 put_user(-1, fence_state[i].out_fence_ptr)) 1320 drm_dbg_atomic(dev, "Couldn't clear out_fence_ptr\n"); 1321 } 1322 1323 kfree(fence_state); 1324} 1325 1326int drm_mode_atomic_ioctl(struct drm_device *dev, 1327 void *data, struct drm_file *file_priv) 1328{ 1329 struct drm_mode_atomic *arg = data; 1330 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); 1331 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); 1332 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 1333 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); 1334 unsigned int copied_objs, copied_props; 1335 struct drm_atomic_state *state; 1336 struct drm_modeset_acquire_ctx ctx; 1337 struct drm_out_fence_state *fence_state; 1338 int ret = 0; 1339 unsigned int i, j, num_fences; 1340 1341 /* disallow for drivers not supporting atomic: */ 1342 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 1343 return -EOPNOTSUPP; 1344 1345 /* disallow for userspace that has not enabled atomic cap (even 1346 * though this may be a bit overkill, since legacy userspace 1347 * wouldn't know how to call this ioctl) 1348 */ 1349 if (!file_priv->atomic) { 1350 drm_dbg_atomic(dev, 1351 "commit failed: atomic cap not enabled\n"); 1352 return -EINVAL; 1353 } 1354 1355 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) { 1356 drm_dbg_atomic(dev, "commit failed: invalid flag\n"); 1357 return -EINVAL; 1358 } 1359 1360 if (arg->reserved) { 1361 drm_dbg_atomic(dev, "commit failed: reserved field set\n"); 1362 return -EINVAL; 1363 } 1364 1365 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) { 1366 drm_dbg_atomic(dev, 1367 "commit failed: invalid flag DRM_MODE_PAGE_FLIP_ASYNC\n"); 1368 return -EINVAL; 1369 } 1370 1371 /* can't test and expect an event at the same time. */ 1372 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && 1373 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { 1374 drm_dbg_atomic(dev, 1375 "commit failed: page-flip event requested with test-only commit\n"); 1376 return -EINVAL; 1377 } 1378 1379 state = drm_atomic_state_alloc(dev); 1380 if (!state) 1381 return -ENOMEM; 1382 1383 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); 1384 state->acquire_ctx = &ctx; 1385 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); 1386 1387retry: 1388 copied_objs = 0; 1389 copied_props = 0; 1390 fence_state = NULL; 1391 num_fences = 0; 1392 1393 for (i = 0; i < arg->count_objs; i++) { 1394 uint32_t obj_id, count_props; 1395 struct drm_mode_object *obj; 1396 1397 if (get_user(obj_id, objs_ptr + copied_objs)) { 1398 ret = -EFAULT; 1399 goto out; 1400 } 1401 1402 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY); 1403 if (!obj) { 1404 drm_dbg_atomic(dev, "cannot find object ID %d", obj_id); 1405 ret = -ENOENT; 1406 goto out; 1407 } 1408 1409 if (!obj->properties) { 1410 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties", obj_id); 1411 drm_mode_object_put(obj); 1412 ret = -ENOENT; 1413 goto out; 1414 } 1415 1416 if (get_user(count_props, count_props_ptr + copied_objs)) { 1417 drm_mode_object_put(obj); 1418 ret = -EFAULT; 1419 goto out; 1420 } 1421 1422 copied_objs++; 1423 1424 for (j = 0; j < count_props; j++) { 1425 uint32_t prop_id; 1426 uint64_t prop_value; 1427 struct drm_property *prop; 1428 1429 if (get_user(prop_id, props_ptr + copied_props)) { 1430 drm_mode_object_put(obj); 1431 ret = -EFAULT; 1432 goto out; 1433 } 1434 1435 prop = drm_mode_obj_find_prop_id(obj, prop_id); 1436 if (!prop) { 1437 drm_dbg_atomic(dev, 1438 "[OBJECT:%d] cannot find property ID %d", 1439 obj_id, prop_id); 1440 drm_mode_object_put(obj); 1441 ret = -ENOENT; 1442 goto out; 1443 } 1444 1445 if (copy_from_user(&prop_value, 1446 prop_values_ptr + copied_props, 1447 sizeof(prop_value))) { 1448 drm_mode_object_put(obj); 1449 ret = -EFAULT; 1450 goto out; 1451 } 1452 1453 ret = drm_atomic_set_property(state, file_priv, 1454 obj, prop, prop_value); 1455 if (ret) { 1456 drm_mode_object_put(obj); 1457 goto out; 1458 } 1459 1460 copied_props++; 1461 } 1462 1463 drm_mode_object_put(obj); 1464 } 1465 1466 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, 1467 &num_fences); 1468 if (ret) 1469 goto out; 1470 1471 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { 1472 ret = drm_atomic_check_only(state); 1473 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { 1474 ret = drm_atomic_nonblocking_commit(state); 1475 } else { 1476 ret = drm_atomic_commit(state); 1477 } 1478 1479out: 1480 complete_signaling(dev, state, fence_state, num_fences, !ret); 1481 1482 if (ret == -EDEADLK) { 1483 drm_atomic_state_clear(state); 1484 ret = drm_modeset_backoff(&ctx); 1485 if (!ret) 1486 goto retry; 1487 } 1488 1489 drm_atomic_state_put(state); 1490 1491 drm_modeset_drop_locks(&ctx); 1492 drm_modeset_acquire_fini(&ctx); 1493 1494 return ret; 1495} 1496