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 drm_atomic_crtc_set_property(struct drm_crtc *crtc, 366 struct drm_crtc_state *state, struct drm_property *property, 367 uint64_t val) 368{ 369 struct drm_device *dev = crtc->dev; 370 struct drm_mode_config *config = &dev->mode_config; 371 bool replaced = false; 372 int ret; 373 374 if (property == config->prop_active) 375 state->active = val; 376 else if (property == config->prop_mode_id) { 377 struct drm_property_blob *mode = 378 drm_property_lookup_blob(dev, val); 379 ret = drm_atomic_set_mode_prop_for_crtc(state, mode); 380 drm_property_blob_put(mode); 381 return ret; 382 } else if (property == config->prop_vrr_enabled) { 383 state->vrr_enabled = val; 384 } else if (property == config->degamma_lut_property) { 385 ret = drm_property_replace_blob_from_id(dev, 386 &state->degamma_lut, 387 val, 388 -1, sizeof(struct drm_color_lut), 389 &replaced); 390 state->color_mgmt_changed |= replaced; 391 return ret; 392 } else if (property == config->ctm_property) { 393 ret = drm_property_replace_blob_from_id(dev, 394 &state->ctm, 395 val, 396 sizeof(struct drm_color_ctm), -1, 397 &replaced); 398 state->color_mgmt_changed |= replaced; 399 return ret; 400 } else if (property == config->gamma_lut_property) { 401 ret = drm_property_replace_blob_from_id(dev, 402 &state->gamma_lut, 403 val, 404 -1, sizeof(struct drm_color_lut), 405 &replaced); 406 state->color_mgmt_changed |= replaced; 407 return ret; 408 } else if (property == config->prop_out_fence_ptr) { 409 s32 __user *fence_ptr = u64_to_user_ptr(val); 410 411 if (!fence_ptr) 412 return 0; 413 414 if (put_user(-1, fence_ptr)) 415 return -EFAULT; 416 417 set_out_fence_for_crtc(state->state, crtc, fence_ptr); 418 } else if (property == crtc->scaling_filter_property) { 419 state->scaling_filter = val; 420 } else if (crtc->funcs->atomic_set_property) { 421 return crtc->funcs->atomic_set_property(crtc, state, property, val); 422 } else { 423 drm_dbg_atomic(crtc->dev, 424 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n", 425 crtc->base.id, crtc->name, 426 property->base.id, property->name); 427 return -EINVAL; 428 } 429 430 return 0; 431} 432 433static int 434drm_atomic_crtc_get_property(struct drm_crtc *crtc, 435 const struct drm_crtc_state *state, 436 struct drm_property *property, uint64_t *val) 437{ 438 struct drm_device *dev = crtc->dev; 439 struct drm_mode_config *config = &dev->mode_config; 440 441 if (property == config->prop_active) 442 *val = drm_atomic_crtc_effectively_active(state); 443 else if (property == config->prop_mode_id) 444 *val = (state->mode_blob) ? state->mode_blob->base.id : 0; 445 else if (property == config->prop_vrr_enabled) 446 *val = state->vrr_enabled; 447 else if (property == config->degamma_lut_property) 448 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; 449 else if (property == config->ctm_property) 450 *val = (state->ctm) ? state->ctm->base.id : 0; 451 else if (property == config->gamma_lut_property) 452 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; 453 else if (property == config->prop_out_fence_ptr) 454 *val = 0; 455 else if (property == crtc->scaling_filter_property) 456 *val = state->scaling_filter; 457 else if (crtc->funcs->atomic_get_property) 458 return crtc->funcs->atomic_get_property(crtc, state, property, val); 459 else { 460 drm_dbg_atomic(dev, 461 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n", 462 crtc->base.id, crtc->name, 463 property->base.id, property->name); 464 return -EINVAL; 465 } 466 467 return 0; 468} 469 470static int drm_atomic_plane_set_property(struct drm_plane *plane, 471 struct drm_plane_state *state, struct drm_file *file_priv, 472 struct drm_property *property, uint64_t val) 473{ 474 struct drm_device *dev = plane->dev; 475 struct drm_mode_config *config = &dev->mode_config; 476 bool replaced = false; 477 int ret; 478 479 if (property == config->prop_fb_id) { 480 struct drm_framebuffer *fb; 481 482 fb = drm_framebuffer_lookup(dev, file_priv, val); 483 drm_atomic_set_fb_for_plane(state, fb); 484 if (fb) 485 drm_framebuffer_put(fb); 486 } else if (property == config->prop_in_fence_fd) { 487 if (state->fence) 488 return -EINVAL; 489 490 if (U642I64(val) == -1) 491 return 0; 492 493 state->fence = sync_file_get_fence(val); 494 if (!state->fence) 495 return -EINVAL; 496 497 } else if (property == config->prop_crtc_id) { 498 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 499 500 if (val && !crtc) { 501 drm_dbg_atomic(dev, 502 "[PROP:%d:%s] cannot find CRTC with ID %llu\n", 503 property->base.id, property->name, val); 504 return -EACCES; 505 } 506 return drm_atomic_set_crtc_for_plane(state, crtc); 507 } else if (property == config->prop_crtc_x) { 508 state->crtc_x = U642I64(val); 509 } else if (property == config->prop_crtc_y) { 510 state->crtc_y = U642I64(val); 511 } else if (property == config->prop_crtc_w) { 512 state->crtc_w = val; 513 } else if (property == config->prop_crtc_h) { 514 state->crtc_h = val; 515 } else if (property == config->prop_src_x) { 516 state->src_x = val; 517 } else if (property == config->prop_src_y) { 518 state->src_y = val; 519 } else if (property == config->prop_src_w) { 520 state->src_w = val; 521 } else if (property == config->prop_src_h) { 522 state->src_h = val; 523 } else if (property == plane->alpha_property) { 524 state->alpha = val; 525 } else if (property == plane->blend_mode_property) { 526 state->pixel_blend_mode = val; 527 } else if (property == plane->rotation_property) { 528 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) { 529 drm_dbg_atomic(plane->dev, 530 "[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n", 531 plane->base.id, plane->name, val); 532 return -EINVAL; 533 } 534 state->rotation = val; 535 } else if (property == plane->zpos_property) { 536 state->zpos = val; 537 } else if (property == plane->color_encoding_property) { 538 state->color_encoding = val; 539 } else if (property == plane->color_range_property) { 540 state->color_range = val; 541 } else if (property == config->prop_fb_damage_clips) { 542 ret = drm_property_replace_blob_from_id(dev, 543 &state->fb_damage_clips, 544 val, 545 -1, 546 sizeof(struct drm_rect), 547 &replaced); 548 return ret; 549 } else if (property == plane->scaling_filter_property) { 550 state->scaling_filter = val; 551 } else if (plane->funcs->atomic_set_property) { 552 return plane->funcs->atomic_set_property(plane, state, 553 property, val); 554 } else if (property == plane->hotspot_x_property) { 555 if (plane->type != DRM_PLANE_TYPE_CURSOR) { 556 drm_dbg_atomic(plane->dev, 557 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n", 558 plane->base.id, plane->name, val); 559 return -EINVAL; 560 } 561 state->hotspot_x = val; 562 } else if (property == plane->hotspot_y_property) { 563 if (plane->type != DRM_PLANE_TYPE_CURSOR) { 564 drm_dbg_atomic(plane->dev, 565 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n", 566 plane->base.id, plane->name, val); 567 return -EINVAL; 568 } 569 state->hotspot_y = val; 570 } else { 571 drm_dbg_atomic(plane->dev, 572 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n", 573 plane->base.id, plane->name, 574 property->base.id, property->name); 575 return -EINVAL; 576 } 577 578 return 0; 579} 580 581static int 582drm_atomic_plane_get_property(struct drm_plane *plane, 583 const struct drm_plane_state *state, 584 struct drm_property *property, uint64_t *val) 585{ 586 struct drm_device *dev = plane->dev; 587 struct drm_mode_config *config = &dev->mode_config; 588 589 if (property == config->prop_fb_id) { 590 *val = (state->fb) ? state->fb->base.id : 0; 591 } else if (property == config->prop_in_fence_fd) { 592 *val = -1; 593 } else if (property == config->prop_crtc_id) { 594 *val = (state->crtc) ? state->crtc->base.id : 0; 595 } else if (property == config->prop_crtc_x) { 596 *val = I642U64(state->crtc_x); 597 } else if (property == config->prop_crtc_y) { 598 *val = I642U64(state->crtc_y); 599 } else if (property == config->prop_crtc_w) { 600 *val = state->crtc_w; 601 } else if (property == config->prop_crtc_h) { 602 *val = state->crtc_h; 603 } else if (property == config->prop_src_x) { 604 *val = state->src_x; 605 } else if (property == config->prop_src_y) { 606 *val = state->src_y; 607 } else if (property == config->prop_src_w) { 608 *val = state->src_w; 609 } else if (property == config->prop_src_h) { 610 *val = state->src_h; 611 } else if (property == plane->alpha_property) { 612 *val = state->alpha; 613 } else if (property == plane->blend_mode_property) { 614 *val = state->pixel_blend_mode; 615 } else if (property == plane->rotation_property) { 616 *val = state->rotation; 617 } else if (property == plane->zpos_property) { 618 *val = state->zpos; 619 } else if (property == plane->color_encoding_property) { 620 *val = state->color_encoding; 621 } else if (property == plane->color_range_property) { 622 *val = state->color_range; 623 } else if (property == config->prop_fb_damage_clips) { 624 *val = (state->fb_damage_clips) ? 625 state->fb_damage_clips->base.id : 0; 626 } else if (property == plane->scaling_filter_property) { 627 *val = state->scaling_filter; 628 } else if (plane->funcs->atomic_get_property) { 629 return plane->funcs->atomic_get_property(plane, state, property, val); 630 } else if (property == plane->hotspot_x_property) { 631 *val = state->hotspot_x; 632 } else if (property == plane->hotspot_y_property) { 633 *val = state->hotspot_y; 634 } else { 635 drm_dbg_atomic(dev, 636 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n", 637 plane->base.id, plane->name, 638 property->base.id, property->name); 639 return -EINVAL; 640 } 641 642 return 0; 643} 644 645static int drm_atomic_set_writeback_fb_for_connector( 646 struct drm_connector_state *conn_state, 647 struct drm_framebuffer *fb) 648{ 649 int ret; 650 struct drm_connector *conn = conn_state->connector; 651 652 ret = drm_writeback_set_fb(conn_state, fb); 653 if (ret < 0) 654 return ret; 655 656 if (fb) 657 drm_dbg_atomic(conn->dev, 658 "Set [FB:%d] for connector state %p\n", 659 fb->base.id, conn_state); 660 else 661 drm_dbg_atomic(conn->dev, 662 "Set [NOFB] for connector state %p\n", 663 conn_state); 664 665 return 0; 666} 667 668static int drm_atomic_connector_set_property(struct drm_connector *connector, 669 struct drm_connector_state *state, struct drm_file *file_priv, 670 struct drm_property *property, uint64_t val) 671{ 672 struct drm_device *dev = connector->dev; 673 struct drm_mode_config *config = &dev->mode_config; 674 bool replaced = false; 675 int ret; 676 677 if (property == config->prop_crtc_id) { 678 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 679 680 if (val && !crtc) { 681 drm_dbg_atomic(dev, 682 "[PROP:%d:%s] cannot find CRTC with ID %llu\n", 683 property->base.id, property->name, val); 684 return -EACCES; 685 } 686 return drm_atomic_set_crtc_for_connector(state, crtc); 687 } else if (property == config->dpms_property) { 688 /* setting DPMS property requires special handling, which 689 * is done in legacy setprop path for us. Disallow (for 690 * now?) atomic writes to DPMS property: 691 */ 692 drm_dbg_atomic(dev, 693 "legacy [PROP:%d:%s] can only be set via legacy uAPI\n", 694 property->base.id, property->name); 695 return -EINVAL; 696 } else if (property == config->tv_select_subconnector_property) { 697 state->tv.select_subconnector = val; 698 } else if (property == config->tv_subconnector_property) { 699 state->tv.subconnector = val; 700 } else if (property == config->tv_left_margin_property) { 701 state->tv.margins.left = val; 702 } else if (property == config->tv_right_margin_property) { 703 state->tv.margins.right = val; 704 } else if (property == config->tv_top_margin_property) { 705 state->tv.margins.top = val; 706 } else if (property == config->tv_bottom_margin_property) { 707 state->tv.margins.bottom = val; 708 } else if (property == config->legacy_tv_mode_property) { 709 state->tv.legacy_mode = val; 710 } else if (property == config->tv_mode_property) { 711 state->tv.mode = val; 712 } else if (property == config->tv_brightness_property) { 713 state->tv.brightness = val; 714 } else if (property == config->tv_contrast_property) { 715 state->tv.contrast = val; 716 } else if (property == config->tv_flicker_reduction_property) { 717 state->tv.flicker_reduction = val; 718 } else if (property == config->tv_overscan_property) { 719 state->tv.overscan = val; 720 } else if (property == config->tv_saturation_property) { 721 state->tv.saturation = val; 722 } else if (property == config->tv_hue_property) { 723 state->tv.hue = val; 724 } else if (property == config->link_status_property) { 725 /* Never downgrade from GOOD to BAD on userspace's request here, 726 * only hw issues can do that. 727 * 728 * For an atomic property the userspace doesn't need to be able 729 * to understand all the properties, but needs to be able to 730 * restore the state it wants on VT switch. So if the userspace 731 * tries to change the link_status from GOOD to BAD, driver 732 * silently rejects it and returns a 0. This prevents userspace 733 * from accidentally breaking the display when it restores the 734 * state. 735 */ 736 if (state->link_status != DRM_LINK_STATUS_GOOD) 737 state->link_status = val; 738 } else if (property == config->hdr_output_metadata_property) { 739 ret = drm_property_replace_blob_from_id(dev, 740 &state->hdr_output_metadata, 741 val, 742 sizeof(struct hdr_output_metadata), -1, 743 &replaced); 744 return ret; 745 } else if (property == config->aspect_ratio_property) { 746 state->picture_aspect_ratio = val; 747 } else if (property == config->content_type_property) { 748 state->content_type = val; 749 } else if (property == connector->scaling_mode_property) { 750 state->scaling_mode = val; 751 } else if (property == config->content_protection_property) { 752 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) { 753 drm_dbg_kms(dev, "only drivers can set CP Enabled\n"); 754 return -EINVAL; 755 } 756 state->content_protection = val; 757 } else if (property == config->hdcp_content_type_property) { 758 state->hdcp_content_type = val; 759 } else if (property == connector->colorspace_property) { 760 state->colorspace = val; 761 } else if (property == config->writeback_fb_id_property) { 762 struct drm_framebuffer *fb; 763 int ret; 764 765 fb = drm_framebuffer_lookup(dev, file_priv, val); 766 ret = drm_atomic_set_writeback_fb_for_connector(state, fb); 767 if (fb) 768 drm_framebuffer_put(fb); 769 return ret; 770 } else if (property == config->writeback_out_fence_ptr_property) { 771 s32 __user *fence_ptr = u64_to_user_ptr(val); 772 773 return set_out_fence_for_connector(state->state, connector, 774 fence_ptr); 775 } else if (property == connector->max_bpc_property) { 776 state->max_requested_bpc = val; 777 } else if (property == connector->privacy_screen_sw_state_property) { 778 state->privacy_screen_sw_state = val; 779 } else if (connector->funcs->atomic_set_property) { 780 return connector->funcs->atomic_set_property(connector, 781 state, property, val); 782 } else { 783 drm_dbg_atomic(connector->dev, 784 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n", 785 connector->base.id, connector->name, 786 property->base.id, property->name); 787 return -EINVAL; 788 } 789 790 return 0; 791} 792 793static int 794drm_atomic_connector_get_property(struct drm_connector *connector, 795 const struct drm_connector_state *state, 796 struct drm_property *property, uint64_t *val) 797{ 798 struct drm_device *dev = connector->dev; 799 struct drm_mode_config *config = &dev->mode_config; 800 801 if (property == config->prop_crtc_id) { 802 *val = (state->crtc) ? state->crtc->base.id : 0; 803 } else if (property == config->dpms_property) { 804 if (state->crtc && state->crtc->state->self_refresh_active) 805 *val = DRM_MODE_DPMS_ON; 806 else 807 *val = connector->dpms; 808 } else if (property == config->tv_select_subconnector_property) { 809 *val = state->tv.select_subconnector; 810 } else if (property == config->tv_subconnector_property) { 811 *val = state->tv.subconnector; 812 } else if (property == config->tv_left_margin_property) { 813 *val = state->tv.margins.left; 814 } else if (property == config->tv_right_margin_property) { 815 *val = state->tv.margins.right; 816 } else if (property == config->tv_top_margin_property) { 817 *val = state->tv.margins.top; 818 } else if (property == config->tv_bottom_margin_property) { 819 *val = state->tv.margins.bottom; 820 } else if (property == config->legacy_tv_mode_property) { 821 *val = state->tv.legacy_mode; 822 } else if (property == config->tv_mode_property) { 823 *val = state->tv.mode; 824 } else if (property == config->tv_brightness_property) { 825 *val = state->tv.brightness; 826 } else if (property == config->tv_contrast_property) { 827 *val = state->tv.contrast; 828 } else if (property == config->tv_flicker_reduction_property) { 829 *val = state->tv.flicker_reduction; 830 } else if (property == config->tv_overscan_property) { 831 *val = state->tv.overscan; 832 } else if (property == config->tv_saturation_property) { 833 *val = state->tv.saturation; 834 } else if (property == config->tv_hue_property) { 835 *val = state->tv.hue; 836 } else if (property == config->link_status_property) { 837 *val = state->link_status; 838 } else if (property == config->aspect_ratio_property) { 839 *val = state->picture_aspect_ratio; 840 } else if (property == config->content_type_property) { 841 *val = state->content_type; 842 } else if (property == connector->colorspace_property) { 843 *val = state->colorspace; 844 } else if (property == connector->scaling_mode_property) { 845 *val = state->scaling_mode; 846 } else if (property == config->hdr_output_metadata_property) { 847 *val = state->hdr_output_metadata ? 848 state->hdr_output_metadata->base.id : 0; 849 } else if (property == config->content_protection_property) { 850 *val = state->content_protection; 851 } else if (property == config->hdcp_content_type_property) { 852 *val = state->hdcp_content_type; 853 } else if (property == config->writeback_fb_id_property) { 854 /* Writeback framebuffer is one-shot, write and forget */ 855 *val = 0; 856 } else if (property == config->writeback_out_fence_ptr_property) { 857 *val = 0; 858 } else if (property == connector->max_bpc_property) { 859 *val = state->max_requested_bpc; 860 } else if (property == connector->privacy_screen_sw_state_property) { 861 *val = state->privacy_screen_sw_state; 862 } else if (connector->funcs->atomic_get_property) { 863 return connector->funcs->atomic_get_property(connector, 864 state, property, val); 865 } else { 866 drm_dbg_atomic(dev, 867 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n", 868 connector->base.id, connector->name, 869 property->base.id, property->name); 870 return -EINVAL; 871 } 872 873 return 0; 874} 875 876int drm_atomic_get_property(struct drm_mode_object *obj, 877 struct drm_property *property, uint64_t *val) 878{ 879 struct drm_device *dev = property->dev; 880 int ret; 881 882 switch (obj->type) { 883 case DRM_MODE_OBJECT_CONNECTOR: { 884 struct drm_connector *connector = obj_to_connector(obj); 885 886 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 887 ret = drm_atomic_connector_get_property(connector, 888 connector->state, property, val); 889 break; 890 } 891 case DRM_MODE_OBJECT_CRTC: { 892 struct drm_crtc *crtc = obj_to_crtc(obj); 893 894 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 895 ret = drm_atomic_crtc_get_property(crtc, 896 crtc->state, property, val); 897 break; 898 } 899 case DRM_MODE_OBJECT_PLANE: { 900 struct drm_plane *plane = obj_to_plane(obj); 901 902 WARN_ON(!drm_modeset_is_locked(&plane->mutex)); 903 ret = drm_atomic_plane_get_property(plane, 904 plane->state, property, val); 905 break; 906 } 907 default: 908 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties\n", obj->id); 909 ret = -EINVAL; 910 break; 911 } 912 913 return ret; 914} 915 916/* 917 * The big monster ioctl 918 */ 919 920static struct drm_pending_vblank_event *create_vblank_event( 921 struct drm_crtc *crtc, uint64_t user_data) 922{ 923 struct drm_pending_vblank_event *e = NULL; 924 925 e = kzalloc(sizeof *e, GFP_KERNEL); 926 if (!e) 927 return NULL; 928 929 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 930 e->event.base.length = sizeof(e->event); 931 e->event.vbl.crtc_id = crtc->base.id; 932 e->event.vbl.user_data = user_data; 933 934 return e; 935} 936 937int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state, 938 struct drm_connector *connector, 939 int mode) 940{ 941 struct drm_connector *tmp_connector; 942 struct drm_connector_state *new_conn_state; 943 struct drm_crtc *crtc; 944 struct drm_crtc_state *crtc_state; 945 int i, ret, old_mode = connector->dpms; 946 bool active = false; 947 948 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, 949 state->acquire_ctx); 950 if (ret) 951 return ret; 952 953 if (mode != DRM_MODE_DPMS_ON) 954 mode = DRM_MODE_DPMS_OFF; 955 connector->dpms = mode; 956 957 crtc = connector->state->crtc; 958 if (!crtc) 959 goto out; 960 ret = drm_atomic_add_affected_connectors(state, crtc); 961 if (ret) 962 goto out; 963 964 crtc_state = drm_atomic_get_crtc_state(state, crtc); 965 if (IS_ERR(crtc_state)) { 966 ret = PTR_ERR(crtc_state); 967 goto out; 968 } 969 970 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) { 971 if (new_conn_state->crtc != crtc) 972 continue; 973 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { 974 active = true; 975 break; 976 } 977 } 978 979 crtc_state->active = active; 980 ret = drm_atomic_commit(state); 981out: 982 if (ret != 0) 983 connector->dpms = old_mode; 984 return ret; 985} 986 987static int drm_atomic_check_prop_changes(int ret, uint64_t old_val, uint64_t prop_value, 988 struct drm_property *prop) 989{ 990 if (ret != 0 || old_val != prop_value) { 991 drm_dbg_atomic(prop->dev, 992 "[PROP:%d:%s] No prop can be changed during async flip\n", 993 prop->base.id, prop->name); 994 return -EINVAL; 995 } 996 997 return 0; 998} 999 1000int drm_atomic_set_property(struct drm_atomic_state *state, 1001 struct drm_file *file_priv, 1002 struct drm_mode_object *obj, 1003 struct drm_property *prop, 1004 u64 prop_value, 1005 bool async_flip) 1006{ 1007 struct drm_mode_object *ref; 1008 u64 old_val; 1009 int ret; 1010 1011 if (!drm_property_change_valid_get(prop, prop_value, &ref)) 1012 return -EINVAL; 1013 1014 switch (obj->type) { 1015 case DRM_MODE_OBJECT_CONNECTOR: { 1016 struct drm_connector *connector = obj_to_connector(obj); 1017 struct drm_connector_state *connector_state; 1018 1019 connector_state = drm_atomic_get_connector_state(state, connector); 1020 if (IS_ERR(connector_state)) { 1021 ret = PTR_ERR(connector_state); 1022 break; 1023 } 1024 1025 if (async_flip) { 1026 ret = drm_atomic_connector_get_property(connector, connector_state, 1027 prop, &old_val); 1028 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 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 if (async_flip) { 1048 ret = drm_atomic_crtc_get_property(crtc, crtc_state, 1049 prop, &old_val); 1050 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 1051 break; 1052 } 1053 1054 ret = drm_atomic_crtc_set_property(crtc, 1055 crtc_state, prop, prop_value); 1056 break; 1057 } 1058 case DRM_MODE_OBJECT_PLANE: { 1059 struct drm_plane *plane = obj_to_plane(obj); 1060 struct drm_plane_state *plane_state; 1061 struct drm_mode_config *config = &plane->dev->mode_config; 1062 1063 plane_state = drm_atomic_get_plane_state(state, plane); 1064 if (IS_ERR(plane_state)) { 1065 ret = PTR_ERR(plane_state); 1066 break; 1067 } 1068 1069 if (async_flip && prop != config->prop_fb_id) { 1070 ret = drm_atomic_plane_get_property(plane, plane_state, 1071 prop, &old_val); 1072 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 1073 break; 1074 } 1075 1076 if (async_flip && plane_state->plane->type != DRM_PLANE_TYPE_PRIMARY) { 1077 drm_dbg_atomic(prop->dev, 1078 "[OBJECT:%d] Only primary planes can be changed during async flip\n", 1079 obj->id); 1080 ret = -EINVAL; 1081 break; 1082 } 1083 1084 ret = drm_atomic_plane_set_property(plane, 1085 plane_state, file_priv, 1086 prop, prop_value); 1087 break; 1088 } 1089 default: 1090 drm_dbg_atomic(prop->dev, "[OBJECT:%d] has no properties\n", obj->id); 1091 ret = -EINVAL; 1092 break; 1093 } 1094 1095 drm_property_change_valid_put(prop, ref); 1096 return ret; 1097} 1098 1099/** 1100 * DOC: explicit fencing properties 1101 * 1102 * Explicit fencing allows userspace to control the buffer synchronization 1103 * between devices. A Fence or a group of fences are transferred to/from 1104 * userspace using Sync File fds and there are two DRM properties for that. 1105 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and 1106 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. 1107 * 1108 * As a contrast, with implicit fencing the kernel keeps track of any 1109 * ongoing rendering, and automatically ensures that the atomic update waits 1110 * for any pending rendering to complete. This is usually tracked in &struct 1111 * dma_resv which can also contain mandatory kernel fences. Implicit syncing 1112 * is how Linux traditionally worked (e.g. DRI2/3 on X.org), whereas explicit 1113 * fencing is what Android wants. 1114 * 1115 * "IN_FENCE_FD���: 1116 * Use this property to pass a fence that DRM should wait on before 1117 * proceeding with the Atomic Commit request and show the framebuffer for 1118 * the plane on the screen. The fence can be either a normal fence or a 1119 * merged one, the sync_file framework will handle both cases and use a 1120 * fence_array if a merged fence is received. Passing -1 here means no 1121 * fences to wait on. 1122 * 1123 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag 1124 * it will only check if the Sync File is a valid one. 1125 * 1126 * On the driver side the fence is stored on the @fence parameter of 1127 * &struct drm_plane_state. Drivers which also support implicit fencing 1128 * should extract the implicit fence using drm_gem_plane_helper_prepare_fb(), 1129 * to make sure there's consistent behaviour between drivers in precedence 1130 * of implicit vs. explicit fencing. 1131 * 1132 * "OUT_FENCE_PTR���: 1133 * Use this property to pass a file descriptor pointer to DRM. Once the 1134 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with 1135 * the file descriptor number of a Sync File. This Sync File contains the 1136 * CRTC fence that will be signaled when all framebuffers present on the 1137 * Atomic Commit * request for that given CRTC are scanned out on the 1138 * screen. 1139 * 1140 * The Atomic Commit request fails if a invalid pointer is passed. If the 1141 * Atomic Commit request fails for any other reason the out fence fd 1142 * returned will be -1. On a Atomic Commit with the 1143 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. 1144 * 1145 * Note that out-fences don't have a special interface to drivers and are 1146 * internally represented by a &struct drm_pending_vblank_event in struct 1147 * &drm_crtc_state, which is also used by the nonblocking atomic commit 1148 * helpers and for the DRM event handling for existing userspace. 1149 */ 1150 1151struct drm_out_fence_state { 1152 s32 __user *out_fence_ptr; 1153 struct sync_file *sync_file; 1154 int fd; 1155}; 1156 1157static int setup_out_fence(struct drm_out_fence_state *fence_state, 1158 struct dma_fence *fence) 1159{ 1160 fence_state->fd = get_unused_fd_flags(O_CLOEXEC); 1161 if (fence_state->fd < 0) 1162 return fence_state->fd; 1163 1164 if (put_user(fence_state->fd, fence_state->out_fence_ptr)) 1165 return -EFAULT; 1166 1167 fence_state->sync_file = sync_file_create(fence); 1168 if (!fence_state->sync_file) 1169 return -ENOMEM; 1170 1171 return 0; 1172} 1173 1174static int prepare_signaling(struct drm_device *dev, 1175 struct drm_atomic_state *state, 1176 struct drm_mode_atomic *arg, 1177 struct drm_file *file_priv, 1178 struct drm_out_fence_state **fence_state, 1179 unsigned int *num_fences) 1180{ 1181 struct drm_crtc *crtc; 1182 struct drm_crtc_state *crtc_state; 1183 struct drm_connector *conn; 1184 struct drm_connector_state *conn_state; 1185 int i, c = 0, ret; 1186 1187 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) 1188 return 0; 1189 1190 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1191 s32 __user *fence_ptr; 1192 1193 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); 1194 1195 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { 1196 struct drm_pending_vblank_event *e; 1197 1198 e = create_vblank_event(crtc, arg->user_data); 1199 if (!e) 1200 return -ENOMEM; 1201 1202 crtc_state->event = e; 1203 } 1204 1205 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { 1206 struct drm_pending_vblank_event *e = crtc_state->event; 1207 1208 if (!file_priv) 1209 continue; 1210 1211 ret = drm_event_reserve_init(dev, file_priv, &e->base, 1212 &e->event.base); 1213 if (ret) { 1214 kfree(e); 1215 crtc_state->event = NULL; 1216 return ret; 1217 } 1218 } 1219 1220 if (fence_ptr) { 1221 struct dma_fence *fence; 1222 struct drm_out_fence_state *f; 1223 1224 f = krealloc(*fence_state, sizeof(**fence_state) * 1225 (*num_fences + 1), GFP_KERNEL); 1226 if (!f) 1227 return -ENOMEM; 1228 1229 memset(&f[*num_fences], 0, sizeof(*f)); 1230 1231 f[*num_fences].out_fence_ptr = fence_ptr; 1232 *fence_state = f; 1233 1234 fence = drm_crtc_create_fence(crtc); 1235 if (!fence) 1236 return -ENOMEM; 1237 1238 ret = setup_out_fence(&f[(*num_fences)++], fence); 1239 if (ret) { 1240 dma_fence_put(fence); 1241 return ret; 1242 } 1243 1244 crtc_state->event->base.fence = fence; 1245 } 1246 1247 c++; 1248 } 1249 1250 for_each_new_connector_in_state(state, conn, conn_state, i) { 1251 struct drm_writeback_connector *wb_conn; 1252 struct drm_out_fence_state *f; 1253 struct dma_fence *fence; 1254 s32 __user *fence_ptr; 1255 1256 if (!conn_state->writeback_job) 1257 continue; 1258 1259 fence_ptr = get_out_fence_for_connector(state, conn); 1260 if (!fence_ptr) 1261 continue; 1262 1263 f = krealloc(*fence_state, sizeof(**fence_state) * 1264 (*num_fences + 1), GFP_KERNEL); 1265 if (!f) 1266 return -ENOMEM; 1267 1268 memset(&f[*num_fences], 0, sizeof(*f)); 1269 1270 f[*num_fences].out_fence_ptr = fence_ptr; 1271 *fence_state = f; 1272 1273 wb_conn = drm_connector_to_writeback(conn); 1274 fence = drm_writeback_get_out_fence(wb_conn); 1275 if (!fence) 1276 return -ENOMEM; 1277 1278 ret = setup_out_fence(&f[(*num_fences)++], fence); 1279 if (ret) { 1280 dma_fence_put(fence); 1281 return ret; 1282 } 1283 1284 conn_state->writeback_job->out_fence = fence; 1285 } 1286 1287 /* 1288 * Having this flag means user mode pends on event which will never 1289 * reach due to lack of at least one CRTC for signaling 1290 */ 1291 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { 1292 drm_dbg_atomic(dev, "need at least one CRTC for DRM_MODE_PAGE_FLIP_EVENT"); 1293 return -EINVAL; 1294 } 1295 1296 return 0; 1297} 1298 1299static void complete_signaling(struct drm_device *dev, 1300 struct drm_atomic_state *state, 1301 struct drm_out_fence_state *fence_state, 1302 unsigned int num_fences, 1303 bool install_fds) 1304{ 1305 struct drm_crtc *crtc; 1306 struct drm_crtc_state *crtc_state; 1307 int i; 1308 1309 if (install_fds) { 1310 for (i = 0; i < num_fences; i++) 1311 fd_install(fence_state[i].fd, 1312 fence_state[i].sync_file->file); 1313 1314 kfree(fence_state); 1315 return; 1316 } 1317 1318 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1319 struct drm_pending_vblank_event *event = crtc_state->event; 1320 /* 1321 * Free the allocated event. drm_atomic_helper_setup_commit 1322 * can allocate an event too, so only free it if it's ours 1323 * to prevent a double free in drm_atomic_state_clear. 1324 */ 1325 if (event && (event->base.fence || event->base.file_priv)) { 1326 drm_event_cancel_free(dev, &event->base); 1327 crtc_state->event = NULL; 1328 } 1329 } 1330 1331 if (!fence_state) 1332 return; 1333 1334 for (i = 0; i < num_fences; i++) { 1335 if (fence_state[i].sync_file) 1336 fput(fence_state[i].sync_file->file); 1337 if (fence_state[i].fd >= 0) 1338 put_unused_fd(fence_state[i].fd); 1339 1340 /* If this fails log error to the user */ 1341 if (fence_state[i].out_fence_ptr && 1342 put_user(-1, fence_state[i].out_fence_ptr)) 1343 drm_dbg_atomic(dev, "Couldn't clear out_fence_ptr\n"); 1344 } 1345 1346 kfree(fence_state); 1347} 1348 1349static void 1350set_async_flip(struct drm_atomic_state *state) 1351{ 1352 struct drm_crtc *crtc; 1353 struct drm_crtc_state *crtc_state; 1354 int i; 1355 1356 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1357 crtc_state->async_flip = true; 1358 } 1359} 1360 1361int drm_mode_atomic_ioctl(struct drm_device *dev, 1362 void *data, struct drm_file *file_priv) 1363{ 1364 struct drm_mode_atomic *arg = data; 1365 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); 1366 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); 1367 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 1368 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); 1369 unsigned int copied_objs, copied_props; 1370 struct drm_atomic_state *state; 1371 struct drm_modeset_acquire_ctx ctx; 1372 struct drm_out_fence_state *fence_state; 1373 int ret = 0; 1374 unsigned int i, j, num_fences; 1375 bool async_flip = false; 1376 1377 /* disallow for drivers not supporting atomic: */ 1378 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 1379 return -EOPNOTSUPP; 1380 1381 /* disallow for userspace that has not enabled atomic cap (even 1382 * though this may be a bit overkill, since legacy userspace 1383 * wouldn't know how to call this ioctl) 1384 */ 1385 if (!file_priv->atomic) { 1386 drm_dbg_atomic(dev, 1387 "commit failed: atomic cap not enabled\n"); 1388 return -EINVAL; 1389 } 1390 1391 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) { 1392 drm_dbg_atomic(dev, "commit failed: invalid flag\n"); 1393 return -EINVAL; 1394 } 1395 1396 if (arg->reserved) { 1397 drm_dbg_atomic(dev, "commit failed: reserved field set\n"); 1398 return -EINVAL; 1399 } 1400 1401 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) { 1402 if (!dev->mode_config.async_page_flip) { 1403 drm_dbg_atomic(dev, 1404 "commit failed: DRM_MODE_PAGE_FLIP_ASYNC not supported\n"); 1405 return -EINVAL; 1406 } 1407 1408 async_flip = true; 1409 } 1410 1411 /* can't test and expect an event at the same time. */ 1412 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && 1413 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { 1414 drm_dbg_atomic(dev, 1415 "commit failed: page-flip event requested with test-only commit\n"); 1416 return -EINVAL; 1417 } 1418 1419 state = drm_atomic_state_alloc(dev); 1420 if (!state) 1421 return -ENOMEM; 1422 1423 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); 1424 state->acquire_ctx = &ctx; 1425 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); 1426 1427retry: 1428 copied_objs = 0; 1429 copied_props = 0; 1430 fence_state = NULL; 1431 num_fences = 0; 1432 1433 for (i = 0; i < arg->count_objs; i++) { 1434 uint32_t obj_id, count_props; 1435 struct drm_mode_object *obj; 1436 1437 if (get_user(obj_id, objs_ptr + copied_objs)) { 1438 ret = -EFAULT; 1439 goto out; 1440 } 1441 1442 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY); 1443 if (!obj) { 1444 drm_dbg_atomic(dev, "cannot find object ID %d", obj_id); 1445 ret = -ENOENT; 1446 goto out; 1447 } 1448 1449 if (!obj->properties) { 1450 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties", obj_id); 1451 drm_mode_object_put(obj); 1452 ret = -ENOENT; 1453 goto out; 1454 } 1455 1456 if (get_user(count_props, count_props_ptr + copied_objs)) { 1457 drm_mode_object_put(obj); 1458 ret = -EFAULT; 1459 goto out; 1460 } 1461 1462 copied_objs++; 1463 1464 for (j = 0; j < count_props; j++) { 1465 uint32_t prop_id; 1466 uint64_t prop_value; 1467 struct drm_property *prop; 1468 1469 if (get_user(prop_id, props_ptr + copied_props)) { 1470 drm_mode_object_put(obj); 1471 ret = -EFAULT; 1472 goto out; 1473 } 1474 1475 prop = drm_mode_obj_find_prop_id(obj, prop_id); 1476 if (!prop) { 1477 drm_dbg_atomic(dev, 1478 "[OBJECT:%d] cannot find property ID %d", 1479 obj_id, prop_id); 1480 drm_mode_object_put(obj); 1481 ret = -ENOENT; 1482 goto out; 1483 } 1484 1485 if (copy_from_user(&prop_value, 1486 prop_values_ptr + copied_props, 1487 sizeof(prop_value))) { 1488 drm_mode_object_put(obj); 1489 ret = -EFAULT; 1490 goto out; 1491 } 1492 1493 ret = drm_atomic_set_property(state, file_priv, obj, 1494 prop, prop_value, async_flip); 1495 if (ret) { 1496 drm_mode_object_put(obj); 1497 goto out; 1498 } 1499 1500 copied_props++; 1501 } 1502 1503 drm_mode_object_put(obj); 1504 } 1505 1506 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, 1507 &num_fences); 1508 if (ret) 1509 goto out; 1510 1511 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) 1512 set_async_flip(state); 1513 1514 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { 1515 ret = drm_atomic_check_only(state); 1516 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { 1517 ret = drm_atomic_nonblocking_commit(state); 1518 } else { 1519 ret = drm_atomic_commit(state); 1520 } 1521 1522out: 1523 complete_signaling(dev, state, fence_state, num_fences, !ret); 1524 1525 if (ret == -EDEADLK) { 1526 drm_atomic_state_clear(state); 1527 ret = drm_modeset_backoff(&ctx); 1528 if (!ret) 1529 goto retry; 1530 } 1531 1532 drm_atomic_state_put(state); 1533 1534 drm_modeset_drop_locks(&ctx); 1535 drm_modeset_acquire_fini(&ctx); 1536 1537 return ret; 1538} 1539