1/* $NetBSD: drm_atomic_uapi.c,v 1.7 2021/12/19 10:45:49 riastradh Exp $ */ 2 3/* 4 * Copyright (C) 2014 Red Hat 5 * Copyright (C) 2014 Intel Corp. 6 * Copyright (C) 2018 Intel Corp. 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a 9 * copy of this software and associated documentation files (the "Software"), 10 * to deal in the Software without restriction, including without limitation 11 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 12 * and/or sell copies of the Software, and to permit persons to whom the 13 * Software is furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in 16 * all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 24 * OTHER DEALINGS IN THE SOFTWARE. 25 * 26 * Authors: 27 * Rob Clark <robdclark@gmail.com> 28 * Daniel Vetter <daniel.vetter@ffwll.ch> 29 */ 30 31#include <sys/cdefs.h> 32__KERNEL_RCSID(0, "$NetBSD: drm_atomic_uapi.c,v 1.7 2021/12/19 10:45:49 riastradh Exp $"); 33 34#include <drm/drm_atomic_uapi.h> 35#include <drm/drm_atomic.h> 36#include <drm/drm_print.h> 37#include <drm/drm_drv.h> 38#include <drm/drm_writeback.h> 39#include <drm/drm_vblank.h> 40 41#include <linux/dma-fence.h> 42#include <linux/uaccess.h> 43#include <linux/sync_file.h> 44#include <linux/file.h> 45 46#include "drm_crtc_internal.h" 47 48/** 49 * DOC: overview 50 * 51 * This file contains the marshalling and demarshalling glue for the atomic UAPI 52 * in all its forms: The monster ATOMIC IOCTL itself, code for GET_PROPERTY and 53 * SET_PROPERTY IOCTLs. Plus interface functions for compatibility helpers and 54 * drivers which have special needs to construct their own atomic updates, e.g. 55 * for load detect or similiar. 56 */ 57 58/** 59 * drm_atomic_set_mode_for_crtc - set mode for CRTC 60 * @state: the CRTC whose incoming state to update 61 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable 62 * 63 * Set a mode (originating from the kernel) on the desired CRTC state and update 64 * the enable property. 65 * 66 * RETURNS: 67 * Zero on success, error code on failure. Cannot return -EDEADLK. 68 */ 69int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state, 70 const struct drm_display_mode *mode) 71{ 72 struct drm_crtc *crtc = state->crtc; 73 struct drm_mode_modeinfo umode; 74 75 /* Early return for no change. */ 76 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0) 77 return 0; 78 79 drm_property_blob_put(state->mode_blob); 80 state->mode_blob = NULL; 81 82 if (mode) { 83 drm_mode_convert_to_umode(&umode, mode); 84 state->mode_blob = 85 drm_property_create_blob(state->crtc->dev, 86 sizeof(umode), 87 &umode); 88 if (IS_ERR(state->mode_blob)) 89 return PTR_ERR(state->mode_blob); 90 91 drm_mode_copy(&state->mode, mode); 92 state->enable = true; 93 DRM_DEBUG_ATOMIC("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_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n", 99 crtc->base.id, crtc->name, state); 100 } 101 102 return 0; 103} 104EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc); 105 106/** 107 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC 108 * @state: the CRTC whose incoming state to update 109 * @blob: pointer to blob property to use for mode 110 * 111 * Set a mode (originating from a blob property) on the desired CRTC state. 112 * This function will take a reference on the blob property for the CRTC state, 113 * and release the reference held on the state's existing mode property, if any 114 * was set. 115 * 116 * RETURNS: 117 * Zero on success, error code on failure. Cannot return -EDEADLK. 118 */ 119int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, 120 struct drm_property_blob *blob) 121{ 122 struct drm_crtc *crtc = state->crtc; 123 124 if (blob == state->mode_blob) 125 return 0; 126 127 drm_property_blob_put(state->mode_blob); 128 state->mode_blob = NULL; 129 130 memset(&state->mode, 0, sizeof(state->mode)); 131 132 if (blob) { 133 int ret; 134 135 if (blob->length != sizeof(struct drm_mode_modeinfo)) { 136 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] bad mode blob length: %zu\n", 137 crtc->base.id, crtc->name, 138 blob->length); 139 return -EINVAL; 140 } 141 142 ret = drm_mode_convert_umode(crtc->dev, 143 &state->mode, blob->data); 144 if (ret) { 145 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n", 146 crtc->base.id, crtc->name, 147 ret, drm_get_mode_status_name(state->mode.status)); 148 drm_mode_debug_printmodeline(&state->mode); 149 return -EINVAL; 150 } 151 152 state->mode_blob = drm_property_blob_get(blob); 153 state->enable = true; 154 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 155 state->mode.name, crtc->base.id, crtc->name, 156 state); 157 } else { 158 state->enable = false; 159 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n", 160 crtc->base.id, crtc->name, state); 161 } 162 163 return 0; 164} 165EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); 166 167/** 168 * drm_atomic_set_crtc_for_plane - set CRTC for plane 169 * @plane_state: the plane whose incoming state to update 170 * @crtc: CRTC to use for the plane 171 * 172 * Changing the assigned CRTC for a plane requires us to grab the lock and state 173 * for the new CRTC, as needed. This function takes care of all these details 174 * besides updating the pointer in the state object itself. 175 * 176 * Returns: 177 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 178 * then the w/w mutex code has detected a deadlock and the entire atomic 179 * sequence must be restarted. All other errors are fatal. 180 */ 181int 182drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, 183 struct drm_crtc *crtc) 184{ 185 struct drm_plane *plane = plane_state->plane; 186 struct drm_crtc_state *crtc_state; 187 /* Nothing to do for same crtc*/ 188 if (plane_state->crtc == crtc) 189 return 0; 190 if (plane_state->crtc) { 191 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 192 plane_state->crtc); 193 if (WARN_ON(IS_ERR(crtc_state))) 194 return PTR_ERR(crtc_state); 195 196 crtc_state->plane_mask &= ~drm_plane_mask(plane); 197 } 198 199 plane_state->crtc = crtc; 200 201 if (crtc) { 202 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 203 crtc); 204 if (IS_ERR(crtc_state)) 205 return PTR_ERR(crtc_state); 206 crtc_state->plane_mask |= drm_plane_mask(plane); 207 } 208 209 if (crtc) 210 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n", 211 plane->base.id, plane->name, plane_state, 212 crtc->base.id, crtc->name); 213 else 214 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [NOCRTC]\n", 215 plane->base.id, plane->name, plane_state); 216 217 return 0; 218} 219EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane); 220 221/** 222 * drm_atomic_set_fb_for_plane - set framebuffer for plane 223 * @plane_state: atomic state object for the plane 224 * @fb: fb to use for the plane 225 * 226 * Changing the assigned framebuffer for a plane requires us to grab a reference 227 * to the new fb and drop the reference to the old fb, if there is one. This 228 * function takes care of all these details besides updating the pointer in the 229 * state object itself. 230 */ 231void 232drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, 233 struct drm_framebuffer *fb) 234{ 235 struct drm_plane *plane = plane_state->plane; 236 237 if (fb) 238 DRM_DEBUG_ATOMIC("Set [FB:%d] for [PLANE:%d:%s] state %p\n", 239 fb->base.id, plane->base.id, plane->name, 240 plane_state); 241 else 242 DRM_DEBUG_ATOMIC("Set [NOFB] for [PLANE:%d:%s] state %p\n", 243 plane->base.id, plane->name, plane_state); 244 245 drm_framebuffer_assign(&plane_state->fb, fb); 246} 247EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); 248 249/** 250 * drm_atomic_set_fence_for_plane - set fence for plane 251 * @plane_state: atomic state object for the plane 252 * @fence: dma_fence to use for the plane 253 * 254 * Helper to setup the plane_state fence in case it is not set yet. 255 * By using this drivers doesn't need to worry if the user choose 256 * implicit or explicit fencing. 257 * 258 * This function will not set the fence to the state if it was set 259 * via explicit fencing interfaces on the atomic ioctl. In that case it will 260 * drop the reference to the fence as we are not storing it anywhere. 261 * Otherwise, if &drm_plane_state.fence is not set this function we just set it 262 * with the received implicit fence. In both cases this function consumes a 263 * reference for @fence. 264 * 265 * This way explicit fencing can be used to overrule implicit fencing, which is 266 * important to make explicit fencing use-cases work: One example is using one 267 * buffer for 2 screens with different refresh rates. Implicit fencing will 268 * clamp rendering to the refresh rate of the slower screen, whereas explicit 269 * fence allows 2 independent render and display loops on a single buffer. If a 270 * driver allows obeys both implicit and explicit fences for plane updates, then 271 * it will break all the benefits of explicit fencing. 272 */ 273void 274drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state, 275 struct dma_fence *fence) 276{ 277 if (plane_state->fence) { 278 dma_fence_put(fence); 279 return; 280 } 281 282 plane_state->fence = fence; 283} 284EXPORT_SYMBOL(drm_atomic_set_fence_for_plane); 285 286/** 287 * drm_atomic_set_crtc_for_connector - set CRTC for connector 288 * @conn_state: atomic state object for the connector 289 * @crtc: CRTC to use for the connector 290 * 291 * Changing the assigned CRTC for a connector requires us to grab the lock and 292 * state for the new CRTC, as needed. This function takes care of all these 293 * details besides updating the pointer in the state object itself. 294 * 295 * Returns: 296 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 297 * then the w/w mutex code has detected a deadlock and the entire atomic 298 * sequence must be restarted. All other errors are fatal. 299 */ 300int 301drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, 302 struct drm_crtc *crtc) 303{ 304 struct drm_connector *connector = conn_state->connector; 305 struct drm_crtc_state *crtc_state; 306 307 if (conn_state->crtc == crtc) 308 return 0; 309 310 if (conn_state->crtc) { 311 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state, 312 conn_state->crtc); 313 314 crtc_state->connector_mask &= 315 ~drm_connector_mask(conn_state->connector); 316 317 drm_connector_put(conn_state->connector); 318 conn_state->crtc = NULL; 319 } 320 321 if (crtc) { 322 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); 323 if (IS_ERR(crtc_state)) 324 return PTR_ERR(crtc_state); 325 326 crtc_state->connector_mask |= 327 drm_connector_mask(conn_state->connector); 328 329 drm_connector_get(conn_state->connector); 330 conn_state->crtc = crtc; 331 332 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n", 333 connector->base.id, connector->name, 334 conn_state, crtc->base.id, crtc->name); 335 } else { 336 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n", 337 connector->base.id, connector->name, 338 conn_state); 339 } 340 341 return 0; 342} 343EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); 344 345static void set_out_fence_for_crtc(struct drm_atomic_state *state, 346 struct drm_crtc *crtc, s32 __user *fence_ptr) 347{ 348 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; 349} 350 351static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state, 352 struct drm_crtc *crtc) 353{ 354 s32 __user *fence_ptr; 355 356 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; 357 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; 358 359 return fence_ptr; 360} 361 362static int set_out_fence_for_connector(struct drm_atomic_state *state, 363 struct drm_connector *connector, 364 s32 __user *fence_ptr) 365{ 366 unsigned int index = drm_connector_index(connector); 367 368 if (!fence_ptr) 369 return 0; 370 371 if (put_user(-1, fence_ptr)) 372 return -EFAULT; 373 374 state->connectors[index].out_fence_ptr = fence_ptr; 375 376 return 0; 377} 378 379static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state, 380 struct drm_connector *connector) 381{ 382 unsigned int index = drm_connector_index(connector); 383 s32 __user *fence_ptr; 384 385 fence_ptr = state->connectors[index].out_fence_ptr; 386 state->connectors[index].out_fence_ptr = NULL; 387 388 return fence_ptr; 389} 390 391static int 392drm_atomic_replace_property_blob_from_id(struct drm_device *dev, 393 struct drm_property_blob **blob, 394 uint64_t blob_id, 395 ssize_t expected_size, 396 ssize_t expected_elem_size, 397 bool *replaced) 398{ 399 struct drm_property_blob *new_blob = NULL; 400 401 if (blob_id != 0) { 402 new_blob = drm_property_lookup_blob(dev, blob_id); 403 if (new_blob == NULL) 404 return -EINVAL; 405 406 if (expected_size > 0 && 407 new_blob->length != expected_size) { 408 drm_property_blob_put(new_blob); 409 return -EINVAL; 410 } 411 if (expected_elem_size > 0 && 412 new_blob->length % expected_elem_size != 0) { 413 drm_property_blob_put(new_blob); 414 return -EINVAL; 415 } 416 } 417 418 *replaced |= drm_property_replace_blob(blob, new_blob); 419 drm_property_blob_put(new_blob); 420 421 return 0; 422} 423 424static int drm_atomic_crtc_set_property(struct drm_crtc *crtc, 425 struct drm_crtc_state *state, struct drm_property *property, 426 uint64_t val) 427{ 428 struct drm_device *dev = crtc->dev; 429 struct drm_mode_config *config = &dev->mode_config; 430 bool replaced = false; 431 int ret; 432 433 if (property == config->prop_active) 434 state->active = val; 435 else if (property == config->prop_mode_id) { 436 struct drm_property_blob *mode = 437 drm_property_lookup_blob(dev, val); 438 ret = drm_atomic_set_mode_prop_for_crtc(state, mode); 439 drm_property_blob_put(mode); 440 return ret; 441 } else if (property == config->prop_vrr_enabled) { 442 state->vrr_enabled = val; 443 } else if (property == config->degamma_lut_property) { 444 ret = drm_atomic_replace_property_blob_from_id(dev, 445 &state->degamma_lut, 446 val, 447 -1, sizeof(struct drm_color_lut), 448 &replaced); 449 state->color_mgmt_changed |= replaced; 450 return ret; 451 } else if (property == config->ctm_property) { 452 ret = drm_atomic_replace_property_blob_from_id(dev, 453 &state->ctm, 454 val, 455 sizeof(struct drm_color_ctm), -1, 456 &replaced); 457 state->color_mgmt_changed |= replaced; 458 return ret; 459 } else if (property == config->gamma_lut_property) { 460 ret = drm_atomic_replace_property_blob_from_id(dev, 461 &state->gamma_lut, 462 val, 463 -1, sizeof(struct drm_color_lut), 464 &replaced); 465 state->color_mgmt_changed |= replaced; 466 return ret; 467 } else if (property == config->prop_out_fence_ptr) { 468 s32 __user *fence_ptr = u64_to_user_ptr(val); 469 470 if (!fence_ptr) 471 return 0; 472 473 if (put_user(-1, fence_ptr)) 474 return -EFAULT; 475 476 set_out_fence_for_crtc(state->state, crtc, fence_ptr); 477 } else if (crtc->funcs->atomic_set_property) { 478 return crtc->funcs->atomic_set_property(crtc, state, property, val); 479 } else { 480 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n", 481 crtc->base.id, crtc->name, 482 property->base.id, property->name); 483 return -EINVAL; 484 } 485 486 return 0; 487} 488 489static int 490drm_atomic_crtc_get_property(struct drm_crtc *crtc, 491 const struct drm_crtc_state *state, 492 struct drm_property *property, uint64_t *val) 493{ 494 struct drm_device *dev = crtc->dev; 495 struct drm_mode_config *config = &dev->mode_config; 496 497 if (property == config->prop_active) 498 *val = drm_atomic_crtc_effectively_active(state); 499 else if (property == config->prop_mode_id) 500 *val = (state->mode_blob) ? state->mode_blob->base.id : 0; 501 else if (property == config->prop_vrr_enabled) 502 *val = state->vrr_enabled; 503 else if (property == config->degamma_lut_property) 504 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; 505 else if (property == config->ctm_property) 506 *val = (state->ctm) ? state->ctm->base.id : 0; 507 else if (property == config->gamma_lut_property) 508 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; 509 else if (property == config->prop_out_fence_ptr) 510 *val = 0; 511 else if (crtc->funcs->atomic_get_property) 512 return crtc->funcs->atomic_get_property(crtc, state, property, val); 513 else 514 return -EINVAL; 515 516 return 0; 517} 518 519static int drm_atomic_plane_set_property(struct drm_plane *plane, 520 struct drm_plane_state *state, struct drm_file *file_priv, 521 struct drm_property *property, uint64_t val) 522{ 523 struct drm_device *dev = plane->dev; 524 struct drm_mode_config *config = &dev->mode_config; 525 bool replaced = false; 526 int ret; 527 528 if (property == config->prop_fb_id) { 529 struct drm_framebuffer *fb; 530 fb = drm_framebuffer_lookup(dev, file_priv, val); 531 drm_atomic_set_fb_for_plane(state, fb); 532 if (fb) 533 drm_framebuffer_put(fb); 534 } else if (property == config->prop_in_fence_fd) { 535 if (state->fence) 536 return -EINVAL; 537 538 if (U642I64(val) == -1) 539 return 0; 540 541 state->fence = sync_file_get_fence(val); 542 if (!state->fence) 543 return -EINVAL; 544 545 } else if (property == config->prop_crtc_id) { 546 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 547 if (val && !crtc) 548 return -EACCES; 549 return drm_atomic_set_crtc_for_plane(state, crtc); 550 } else if (property == config->prop_crtc_x) { 551 state->crtc_x = U642I64(val); 552 } else if (property == config->prop_crtc_y) { 553 state->crtc_y = U642I64(val); 554 } else if (property == config->prop_crtc_w) { 555 state->crtc_w = val; 556 } else if (property == config->prop_crtc_h) { 557 state->crtc_h = val; 558 } else if (property == config->prop_src_x) { 559 state->src_x = val; 560 } else if (property == config->prop_src_y) { 561 state->src_y = val; 562 } else if (property == config->prop_src_w) { 563 state->src_w = val; 564 } else if (property == config->prop_src_h) { 565 state->src_h = val; 566 } else if (property == plane->alpha_property) { 567 state->alpha = val; 568 } else if (property == plane->blend_mode_property) { 569 state->pixel_blend_mode = val; 570 } else if (property == plane->rotation_property) { 571 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) { 572 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] bad rotation bitmask: 0x%"PRIx64"\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 (plane->funcs->atomic_set_property) { 592 return plane->funcs->atomic_set_property(plane, state, 593 property, val); 594 } else { 595 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n", 596 plane->base.id, plane->name, 597 property->base.id, property->name); 598 return -EINVAL; 599 } 600 601 return 0; 602} 603 604static int 605drm_atomic_plane_get_property(struct drm_plane *plane, 606 const struct drm_plane_state *state, 607 struct drm_property *property, uint64_t *val) 608{ 609 struct drm_device *dev = plane->dev; 610 struct drm_mode_config *config = &dev->mode_config; 611 612 if (property == config->prop_fb_id) { 613 *val = (state->fb) ? state->fb->base.id : 0; 614 } else if (property == config->prop_in_fence_fd) { 615 *val = -1; 616 } else if (property == config->prop_crtc_id) { 617 *val = (state->crtc) ? state->crtc->base.id : 0; 618 } else if (property == config->prop_crtc_x) { 619 *val = I642U64(state->crtc_x); 620 } else if (property == config->prop_crtc_y) { 621 *val = I642U64(state->crtc_y); 622 } else if (property == config->prop_crtc_w) { 623 *val = state->crtc_w; 624 } else if (property == config->prop_crtc_h) { 625 *val = state->crtc_h; 626 } else if (property == config->prop_src_x) { 627 *val = state->src_x; 628 } else if (property == config->prop_src_y) { 629 *val = state->src_y; 630 } else if (property == config->prop_src_w) { 631 *val = state->src_w; 632 } else if (property == config->prop_src_h) { 633 *val = state->src_h; 634 } else if (property == plane->alpha_property) { 635 *val = state->alpha; 636 } else if (property == plane->blend_mode_property) { 637 *val = state->pixel_blend_mode; 638 } else if (property == plane->rotation_property) { 639 *val = state->rotation; 640 } else if (property == plane->zpos_property) { 641 *val = state->zpos; 642 } else if (property == plane->color_encoding_property) { 643 *val = state->color_encoding; 644 } else if (property == plane->color_range_property) { 645 *val = state->color_range; 646 } else if (property == config->prop_fb_damage_clips) { 647 *val = (state->fb_damage_clips) ? 648 state->fb_damage_clips->base.id : 0; 649 } else if (plane->funcs->atomic_get_property) { 650 return plane->funcs->atomic_get_property(plane, state, property, val); 651 } else { 652 return -EINVAL; 653 } 654 655 return 0; 656} 657 658static int drm_atomic_set_writeback_fb_for_connector( 659 struct drm_connector_state *conn_state, 660 struct drm_framebuffer *fb) 661{ 662 int ret; 663 664 ret = drm_writeback_set_fb(conn_state, fb); 665 if (ret < 0) 666 return ret; 667 668 if (fb) 669 DRM_DEBUG_ATOMIC("Set [FB:%d] for connector state %p\n", 670 fb->base.id, conn_state); 671 else 672 DRM_DEBUG_ATOMIC("Set [NOFB] for connector state %p\n", 673 conn_state); 674 675 return 0; 676} 677 678static int drm_atomic_connector_set_property(struct drm_connector *connector, 679 struct drm_connector_state *state, struct drm_file *file_priv, 680 struct drm_property *property, uint64_t val) 681{ 682 struct drm_device *dev = connector->dev; 683 struct drm_mode_config *config = &dev->mode_config; 684 bool replaced = false; 685 686 if (property == config->prop_crtc_id) { 687 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 688 if (val && !crtc) 689 return -EACCES; 690 return drm_atomic_set_crtc_for_connector(state, crtc); 691 } else if (property == config->dpms_property) { 692 /* setting DPMS property requires special handling, which 693 * is done in legacy setprop path for us. Disallow (for 694 * now?) atomic writes to DPMS property: 695 */ 696 return -EINVAL; 697 } else if (property == config->tv_select_subconnector_property) { 698 state->tv.subconnector = val; 699 } else if (property == config->tv_left_margin_property) { 700 state->tv.margins.left = val; 701 } else if (property == config->tv_right_margin_property) { 702 state->tv.margins.right = val; 703 } else if (property == config->tv_top_margin_property) { 704 state->tv.margins.top = val; 705 } else if (property == config->tv_bottom_margin_property) { 706 state->tv.margins.bottom = val; 707 } else if (property == config->tv_mode_property) { 708 state->tv.mode = val; 709 } else if (property == config->tv_brightness_property) { 710 state->tv.brightness = val; 711 } else if (property == config->tv_contrast_property) { 712 state->tv.contrast = val; 713 } else if (property == config->tv_flicker_reduction_property) { 714 state->tv.flicker_reduction = val; 715 } else if (property == config->tv_overscan_property) { 716 state->tv.overscan = val; 717 } else if (property == config->tv_saturation_property) { 718 state->tv.saturation = val; 719 } else if (property == config->tv_hue_property) { 720 state->tv.hue = val; 721 } else if (property == config->link_status_property) { 722 /* Never downgrade from GOOD to BAD on userspace's request here, 723 * only hw issues can do that. 724 * 725 * For an atomic property the userspace doesn't need to be able 726 * to understand all the properties, but needs to be able to 727 * restore the state it wants on VT switch. So if the userspace 728 * tries to change the link_status from GOOD to BAD, driver 729 * silently rejects it and returns a 0. This prevents userspace 730 * from accidently breaking the display when it restores the 731 * state. 732 */ 733 if (state->link_status != DRM_LINK_STATUS_GOOD) 734 state->link_status = val; 735 } else if (property == config->hdr_output_metadata_property) { 736 int ret; 737 ret = drm_atomic_replace_property_blob_from_id(dev, 738 &state->hdr_output_metadata, 739 val, 740 sizeof(struct hdr_output_metadata), -1, 741 &replaced); 742 return ret; 743 } else if (property == config->aspect_ratio_property) { 744 state->picture_aspect_ratio = val; 745 } else if (property == config->content_type_property) { 746 state->content_type = val; 747 } else if (property == connector->scaling_mode_property) { 748 state->scaling_mode = val; 749 } else if (property == config->content_protection_property) { 750 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) { 751 DRM_DEBUG_KMS("only drivers can set CP Enabled\n"); 752 return -EINVAL; 753 } 754 state->content_protection = val; 755 } else if (property == config->hdcp_content_type_property) { 756 state->hdcp_content_type = val; 757 } else if (property == connector->colorspace_property) { 758 state->colorspace = val; 759 } else if (property == config->writeback_fb_id_property) { 760 struct drm_framebuffer *fb; 761 int ret; 762 fb = drm_framebuffer_lookup(dev, file_priv, val); 763 ret = drm_atomic_set_writeback_fb_for_connector(state, fb); 764 if (fb) 765 drm_framebuffer_put(fb); 766 return ret; 767 } else if (property == config->writeback_out_fence_ptr_property) { 768 s32 __user *fence_ptr = u64_to_user_ptr(val); 769 770 return set_out_fence_for_connector(state->state, connector, 771 fence_ptr); 772 } else if (property == connector->max_bpc_property) { 773 state->max_requested_bpc = val; 774 } else if (connector->funcs->atomic_set_property) { 775 return connector->funcs->atomic_set_property(connector, 776 state, property, val); 777 } else { 778 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n", 779 connector->base.id, connector->name, 780 property->base.id, property->name); 781 return -EINVAL; 782 } 783 784 return 0; 785} 786 787static int 788drm_atomic_connector_get_property(struct drm_connector *connector, 789 const struct drm_connector_state *state, 790 struct drm_property *property, uint64_t *val) 791{ 792 struct drm_device *dev = connector->dev; 793 struct drm_mode_config *config = &dev->mode_config; 794 795 if (property == config->prop_crtc_id) { 796 *val = (state->crtc) ? state->crtc->base.id : 0; 797 } else if (property == config->dpms_property) { 798 if (state->crtc && state->crtc->state->self_refresh_active) 799 *val = DRM_MODE_DPMS_ON; 800 else 801 *val = connector->dpms; 802 } else if (property == config->tv_select_subconnector_property) { 803 *val = state->tv.subconnector; 804 } else if (property == config->tv_left_margin_property) { 805 *val = state->tv.margins.left; 806 } else if (property == config->tv_right_margin_property) { 807 *val = state->tv.margins.right; 808 } else if (property == config->tv_top_margin_property) { 809 *val = state->tv.margins.top; 810 } else if (property == config->tv_bottom_margin_property) { 811 *val = state->tv.margins.bottom; 812 } else if (property == config->tv_mode_property) { 813 *val = state->tv.mode; 814 } else if (property == config->tv_brightness_property) { 815 *val = state->tv.brightness; 816 } else if (property == config->tv_contrast_property) { 817 *val = state->tv.contrast; 818 } else if (property == config->tv_flicker_reduction_property) { 819 *val = state->tv.flicker_reduction; 820 } else if (property == config->tv_overscan_property) { 821 *val = state->tv.overscan; 822 } else if (property == config->tv_saturation_property) { 823 *val = state->tv.saturation; 824 } else if (property == config->tv_hue_property) { 825 *val = state->tv.hue; 826 } else if (property == config->link_status_property) { 827 *val = state->link_status; 828 } else if (property == config->aspect_ratio_property) { 829 *val = state->picture_aspect_ratio; 830 } else if (property == config->content_type_property) { 831 *val = state->content_type; 832 } else if (property == connector->colorspace_property) { 833 *val = state->colorspace; 834 } else if (property == connector->scaling_mode_property) { 835 *val = state->scaling_mode; 836 } else if (property == config->hdr_output_metadata_property) { 837 *val = state->hdr_output_metadata ? 838 state->hdr_output_metadata->base.id : 0; 839 } else if (property == config->content_protection_property) { 840 *val = state->content_protection; 841 } else if (property == config->hdcp_content_type_property) { 842 *val = state->hdcp_content_type; 843 } else if (property == config->writeback_fb_id_property) { 844 /* Writeback framebuffer is one-shot, write and forget */ 845 *val = 0; 846 } else if (property == config->writeback_out_fence_ptr_property) { 847 *val = 0; 848 } else if (property == connector->max_bpc_property) { 849 *val = state->max_requested_bpc; 850 } else if (connector->funcs->atomic_get_property) { 851 return connector->funcs->atomic_get_property(connector, 852 state, property, val); 853 } else { 854 return -EINVAL; 855 } 856 857 return 0; 858} 859 860int drm_atomic_get_property(struct drm_mode_object *obj, 861 struct drm_property *property, uint64_t *val) 862{ 863 struct drm_device *dev = property->dev; 864 int ret; 865 866 switch (obj->type) { 867 case DRM_MODE_OBJECT_CONNECTOR: { 868 struct drm_connector *connector = obj_to_connector(obj); 869 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 870 ret = drm_atomic_connector_get_property(connector, 871 connector->state, property, val); 872 break; 873 } 874 case DRM_MODE_OBJECT_CRTC: { 875 struct drm_crtc *crtc = obj_to_crtc(obj); 876 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 877 ret = drm_atomic_crtc_get_property(crtc, 878 crtc->state, property, val); 879 break; 880 } 881 case DRM_MODE_OBJECT_PLANE: { 882 struct drm_plane *plane = obj_to_plane(obj); 883 WARN_ON(!drm_modeset_is_locked(&plane->mutex)); 884 ret = drm_atomic_plane_get_property(plane, 885 plane->state, property, val); 886 break; 887 } 888 default: 889 ret = -EINVAL; 890 break; 891 } 892 893 return ret; 894} 895 896/* 897 * The big monster ioctl 898 */ 899 900static struct drm_pending_vblank_event *create_vblank_event( 901 struct drm_crtc *crtc, uint64_t user_data) 902{ 903 struct drm_pending_vblank_event *e = NULL; 904 905 e = kzalloc(sizeof *e, GFP_KERNEL); 906 if (!e) 907 return NULL; 908 909 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 910 e->event.base.length = sizeof(e->event); 911 e->event.vbl.crtc_id = crtc->base.id; 912 e->event.vbl.user_data = user_data; 913 914 return e; 915} 916 917int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state, 918 struct drm_connector *connector, 919 int mode) 920{ 921 struct drm_connector *tmp_connector; 922 struct drm_connector_state *new_conn_state; 923 struct drm_crtc *crtc; 924 struct drm_crtc_state *crtc_state; 925 int i, ret, old_mode = connector->dpms; 926 bool active = false; 927 928 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, 929 state->acquire_ctx); 930 if (ret) 931 return ret; 932 933 if (mode != DRM_MODE_DPMS_ON) 934 mode = DRM_MODE_DPMS_OFF; 935 connector->dpms = mode; 936 937 crtc = connector->state->crtc; 938 if (!crtc) 939 goto out; 940 ret = drm_atomic_add_affected_connectors(state, crtc); 941 if (ret) 942 goto out; 943 944 crtc_state = drm_atomic_get_crtc_state(state, crtc); 945 if (IS_ERR(crtc_state)) { 946 ret = PTR_ERR(crtc_state); 947 goto out; 948 } 949 950 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) { 951 if (new_conn_state->crtc != crtc) 952 continue; 953 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { 954 active = true; 955 break; 956 } 957 } 958 959 crtc_state->active = active; 960 ret = drm_atomic_commit(state); 961out: 962 if (ret != 0) 963 connector->dpms = old_mode; 964 return ret; 965} 966 967int drm_atomic_set_property(struct drm_atomic_state *state, 968 struct drm_file *file_priv, 969 struct drm_mode_object *obj, 970 struct drm_property *prop, 971 uint64_t prop_value) 972{ 973 struct drm_mode_object *ref; 974 int ret; 975 976 if (!drm_property_change_valid_get(prop, prop_value, &ref)) 977 return -EINVAL; 978 979 switch (obj->type) { 980 case DRM_MODE_OBJECT_CONNECTOR: { 981 struct drm_connector *connector = obj_to_connector(obj); 982 struct drm_connector_state *connector_state; 983 984 connector_state = drm_atomic_get_connector_state(state, connector); 985 if (IS_ERR(connector_state)) { 986 ret = PTR_ERR(connector_state); 987 break; 988 } 989 990 ret = drm_atomic_connector_set_property(connector, 991 connector_state, file_priv, 992 prop, prop_value); 993 break; 994 } 995 case DRM_MODE_OBJECT_CRTC: { 996 struct drm_crtc *crtc = obj_to_crtc(obj); 997 struct drm_crtc_state *crtc_state; 998 999 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1000 if (IS_ERR(crtc_state)) { 1001 ret = PTR_ERR(crtc_state); 1002 break; 1003 } 1004 1005 ret = drm_atomic_crtc_set_property(crtc, 1006 crtc_state, prop, prop_value); 1007 break; 1008 } 1009 case DRM_MODE_OBJECT_PLANE: { 1010 struct drm_plane *plane = obj_to_plane(obj); 1011 struct drm_plane_state *plane_state; 1012 1013 plane_state = drm_atomic_get_plane_state(state, plane); 1014 if (IS_ERR(plane_state)) { 1015 ret = PTR_ERR(plane_state); 1016 break; 1017 } 1018 1019 ret = drm_atomic_plane_set_property(plane, 1020 plane_state, file_priv, 1021 prop, prop_value); 1022 break; 1023 } 1024 default: 1025 ret = -EINVAL; 1026 break; 1027 } 1028 1029 drm_property_change_valid_put(prop, ref); 1030 return ret; 1031} 1032 1033/** 1034 * DOC: explicit fencing properties 1035 * 1036 * Explicit fencing allows userspace to control the buffer synchronization 1037 * between devices. A Fence or a group of fences are transfered to/from 1038 * userspace using Sync File fds and there are two DRM properties for that. 1039 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and 1040 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. 1041 * 1042 * As a contrast, with implicit fencing the kernel keeps track of any 1043 * ongoing rendering, and automatically ensures that the atomic update waits 1044 * for any pending rendering to complete. For shared buffers represented with 1045 * a &struct dma_buf this is tracked in &struct dma_resv. 1046 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org), 1047 * whereas explicit fencing is what Android wants. 1048 * 1049 * "IN_FENCE_FD���: 1050 * Use this property to pass a fence that DRM should wait on before 1051 * proceeding with the Atomic Commit request and show the framebuffer for 1052 * the plane on the screen. The fence can be either a normal fence or a 1053 * merged one, the sync_file framework will handle both cases and use a 1054 * fence_array if a merged fence is received. Passing -1 here means no 1055 * fences to wait on. 1056 * 1057 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag 1058 * it will only check if the Sync File is a valid one. 1059 * 1060 * On the driver side the fence is stored on the @fence parameter of 1061 * &struct drm_plane_state. Drivers which also support implicit fencing 1062 * should set the implicit fence using drm_atomic_set_fence_for_plane(), 1063 * to make sure there's consistent behaviour between drivers in precedence 1064 * of implicit vs. explicit fencing. 1065 * 1066 * "OUT_FENCE_PTR���: 1067 * Use this property to pass a file descriptor pointer to DRM. Once the 1068 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with 1069 * the file descriptor number of a Sync File. This Sync File contains the 1070 * CRTC fence that will be signaled when all framebuffers present on the 1071 * Atomic Commit * request for that given CRTC are scanned out on the 1072 * screen. 1073 * 1074 * The Atomic Commit request fails if a invalid pointer is passed. If the 1075 * Atomic Commit request fails for any other reason the out fence fd 1076 * returned will be -1. On a Atomic Commit with the 1077 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. 1078 * 1079 * Note that out-fences don't have a special interface to drivers and are 1080 * internally represented by a &struct drm_pending_vblank_event in struct 1081 * &drm_crtc_state, which is also used by the nonblocking atomic commit 1082 * helpers and for the DRM event handling for existing userspace. 1083 */ 1084 1085struct drm_out_fence_state { 1086 s32 __user *out_fence_ptr; 1087 struct sync_file *sync_file; 1088 int fd; 1089}; 1090 1091static int setup_out_fence(struct drm_out_fence_state *fence_state, 1092 struct dma_fence *fence) 1093{ 1094#ifdef __NetBSD__ 1095 int fd = -1; 1096 struct file *fp = NULL; 1097 int ret; 1098 1099 /* Allocate a file descriptor. */ 1100 /* XXX errno NetBSD->Linux */ 1101 ret = -fd_allocfile(&fp, &fd); 1102 if (ret) 1103 goto out; 1104 1105 /* Prepare to transmit it to user. */ 1106 /* XXX errno NetBSD->Linux */ 1107 ret = -copyout(&fd, fence_state->out_fence_ptr, sizeof fd); 1108 if (ret) 1109 goto out; 1110 1111 /* Create sync file. */ 1112 fence_state->sync_file = sync_file_create(fence, fp); 1113 if (fence_state->sync_file == NULL) { 1114 ret = -ENOMEM; 1115 goto out; 1116 } 1117 fd_affix(curproc, fp, fd); 1118 fp = NULL; /* sync_file consumes */ 1119 1120out: if (fp != NULL) { 1121 fd_abort(curproc, fp, fd); 1122 fd = -1; 1123 } 1124 fence_state->fd = fd; 1125 return ret; 1126#else 1127 fence_state->fd = get_unused_fd_flags(O_CLOEXEC); 1128 if (fence_state->fd < 0) 1129 return fence_state->fd; 1130 1131 if (put_user(fence_state->fd, fence_state->out_fence_ptr)) 1132 return -EFAULT; 1133 1134 fence_state->sync_file = sync_file_create(fence); 1135 if (!fence_state->sync_file) 1136 return -ENOMEM; 1137 1138 return 0; 1139#endif 1140} 1141 1142static int prepare_signaling(struct drm_device *dev, 1143 struct drm_atomic_state *state, 1144 struct drm_mode_atomic *arg, 1145 struct drm_file *file_priv, 1146 struct drm_out_fence_state **fence_state, 1147 unsigned int *num_fences) 1148{ 1149 struct drm_crtc *crtc; 1150 struct drm_crtc_state *crtc_state; 1151 struct drm_connector *conn; 1152 struct drm_connector_state *conn_state; 1153 int i, c = 0, ret; 1154 1155 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) 1156 return 0; 1157 1158 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1159 s32 __user *fence_ptr; 1160 1161 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); 1162 1163 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { 1164 struct drm_pending_vblank_event *e; 1165 1166 e = create_vblank_event(crtc, arg->user_data); 1167 if (!e) 1168 return -ENOMEM; 1169 1170 crtc_state->event = e; 1171 } 1172 1173 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { 1174 struct drm_pending_vblank_event *e = crtc_state->event; 1175 1176 if (!file_priv) 1177 continue; 1178 1179 ret = drm_event_reserve_init(dev, file_priv, &e->base, 1180 &e->event.base); 1181 if (ret) { 1182 kfree(e); 1183 crtc_state->event = NULL; 1184 return ret; 1185 } 1186 } 1187 1188 if (fence_ptr) { 1189 struct dma_fence *fence; 1190 struct drm_out_fence_state *f; 1191 1192 f = krealloc(*fence_state, sizeof(**fence_state) * 1193 (*num_fences + 1), GFP_KERNEL); 1194 if (!f) 1195 return -ENOMEM; 1196 1197 memset(&f[*num_fences], 0, sizeof(*f)); 1198 1199 f[*num_fences].out_fence_ptr = fence_ptr; 1200 *fence_state = f; 1201 1202 fence = drm_crtc_create_fence(crtc); 1203 if (!fence) 1204 return -ENOMEM; 1205 1206 ret = setup_out_fence(&f[(*num_fences)++], fence); 1207 if (ret) { 1208 dma_fence_put(fence); 1209 return ret; 1210 } 1211 1212 crtc_state->event->base.fence = fence; 1213 } 1214 1215 c++; 1216 } 1217 1218 for_each_new_connector_in_state(state, conn, conn_state, i) { 1219 struct drm_writeback_connector *wb_conn; 1220 struct drm_out_fence_state *f; 1221 struct dma_fence *fence; 1222 s32 __user *fence_ptr; 1223 1224 if (!conn_state->writeback_job) 1225 continue; 1226 1227 fence_ptr = get_out_fence_for_connector(state, conn); 1228 if (!fence_ptr) 1229 continue; 1230 1231 f = krealloc(*fence_state, sizeof(**fence_state) * 1232 (*num_fences + 1), GFP_KERNEL); 1233 if (!f) 1234 return -ENOMEM; 1235 1236 memset(&f[*num_fences], 0, sizeof(*f)); 1237 1238 f[*num_fences].out_fence_ptr = fence_ptr; 1239 *fence_state = f; 1240 1241 wb_conn = drm_connector_to_writeback(conn); 1242 fence = drm_writeback_get_out_fence(wb_conn); 1243 if (!fence) 1244 return -ENOMEM; 1245 1246 ret = setup_out_fence(&f[(*num_fences)++], fence); 1247 if (ret) { 1248 dma_fence_put(fence); 1249 return ret; 1250 } 1251 1252 conn_state->writeback_job->out_fence = fence; 1253 } 1254 1255 /* 1256 * Having this flag means user mode pends on event which will never 1257 * reach due to lack of at least one CRTC for signaling 1258 */ 1259 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) 1260 return -EINVAL; 1261 1262 return 0; 1263} 1264 1265static void complete_signaling(struct drm_device *dev, 1266 struct drm_atomic_state *state, 1267 struct drm_out_fence_state *fence_state, 1268 unsigned int num_fences, 1269 bool install_fds) 1270{ 1271 struct drm_crtc *crtc; 1272 struct drm_crtc_state *crtc_state; 1273 int i; 1274 1275 if (install_fds) { 1276 for (i = 0; i < num_fences; i++) 1277 fd_install(fence_state[i].fd, 1278 fence_state[i].sync_file->file); 1279 1280 kfree(fence_state); 1281 return; 1282 } 1283 1284 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1285 struct drm_pending_vblank_event *event = crtc_state->event; 1286 /* 1287 * Free the allocated event. drm_atomic_helper_setup_commit 1288 * can allocate an event too, so only free it if it's ours 1289 * to prevent a double free in drm_atomic_state_clear. 1290 */ 1291 if (event && (event->base.fence || event->base.file_priv)) { 1292 drm_event_cancel_free(dev, &event->base); 1293 crtc_state->event = NULL; 1294 } 1295 } 1296 1297 if (!fence_state) 1298 return; 1299 1300 for (i = 0; i < num_fences; i++) { 1301#ifdef __NetBSD__ 1302 if (fd_getfile(fence_state[i].fd)) 1303 (void)fd_close(fence_state[i].fd); 1304#else 1305 if (fence_state[i].sync_file) 1306 fput(fence_state[i].sync_file->file); 1307 if (fence_state[i].fd >= 0) 1308 put_unused_fd(fence_state[i].fd); 1309#endif 1310 1311 /* If this fails log error to the user */ 1312 if (fence_state[i].out_fence_ptr && 1313 put_user(-1, fence_state[i].out_fence_ptr)) 1314 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n"); 1315 } 1316 1317 kfree(fence_state); 1318} 1319 1320int drm_mode_atomic_ioctl(struct drm_device *dev, 1321 void *data, struct drm_file *file_priv) 1322{ 1323 struct drm_mode_atomic *arg = data; 1324 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); 1325 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); 1326 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 1327 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); 1328 unsigned int copied_objs, copied_props; 1329 struct drm_atomic_state *state; 1330 struct drm_modeset_acquire_ctx ctx; 1331 struct drm_out_fence_state *fence_state; 1332 int ret = 0; 1333 unsigned int i, j, num_fences; 1334 1335 /* disallow for drivers not supporting atomic: */ 1336 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 1337 return -EOPNOTSUPP; 1338 1339 /* disallow for userspace that has not enabled atomic cap (even 1340 * though this may be a bit overkill, since legacy userspace 1341 * wouldn't know how to call this ioctl) 1342 */ 1343 if (!file_priv->atomic) 1344 return -EINVAL; 1345 1346 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) 1347 return -EINVAL; 1348 1349 if (arg->reserved) 1350 return -EINVAL; 1351 1352 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) 1353 return -EINVAL; 1354 1355 /* can't test and expect an event at the same time. */ 1356 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && 1357 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) 1358 return -EINVAL; 1359 1360 state = drm_atomic_state_alloc(dev); 1361 if (!state) 1362 return -ENOMEM; 1363 1364 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); 1365 state->acquire_ctx = &ctx; 1366 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); 1367 1368retry: 1369 copied_objs = 0; 1370 copied_props = 0; 1371 fence_state = NULL; 1372 num_fences = 0; 1373 1374 for (i = 0; i < arg->count_objs; i++) { 1375 uint32_t obj_id, count_props; 1376 struct drm_mode_object *obj; 1377 1378 if (get_user(obj_id, objs_ptr + copied_objs)) { 1379 ret = -EFAULT; 1380 goto out; 1381 } 1382 1383 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY); 1384 if (!obj) { 1385 ret = -ENOENT; 1386 goto out; 1387 } 1388 1389 if (!obj->properties) { 1390 drm_mode_object_put(obj); 1391 ret = -ENOENT; 1392 goto out; 1393 } 1394 1395 if (get_user(count_props, count_props_ptr + copied_objs)) { 1396 drm_mode_object_put(obj); 1397 ret = -EFAULT; 1398 goto out; 1399 } 1400 1401 copied_objs++; 1402 1403 for (j = 0; j < count_props; j++) { 1404 uint32_t prop_id; 1405 uint64_t prop_value; 1406 struct drm_property *prop; 1407 1408 if (get_user(prop_id, props_ptr + copied_props)) { 1409 drm_mode_object_put(obj); 1410 ret = -EFAULT; 1411 goto out; 1412 } 1413 1414 prop = drm_mode_obj_find_prop_id(obj, prop_id); 1415 if (!prop) { 1416 drm_mode_object_put(obj); 1417 ret = -ENOENT; 1418 goto out; 1419 } 1420 1421 if (copy_from_user(&prop_value, 1422 prop_values_ptr + copied_props, 1423 sizeof(prop_value))) { 1424 drm_mode_object_put(obj); 1425 ret = -EFAULT; 1426 goto out; 1427 } 1428 1429 ret = drm_atomic_set_property(state, file_priv, 1430 obj, prop, prop_value); 1431 if (ret) { 1432 drm_mode_object_put(obj); 1433 goto out; 1434 } 1435 1436 copied_props++; 1437 } 1438 1439 drm_mode_object_put(obj); 1440 } 1441 1442 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, 1443 &num_fences); 1444 if (ret) 1445 goto out; 1446 1447 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { 1448 ret = drm_atomic_check_only(state); 1449 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { 1450 ret = drm_atomic_nonblocking_commit(state); 1451 } else { 1452 if (drm_debug_enabled(DRM_UT_STATE)) 1453 drm_atomic_print_state(state); 1454 1455 ret = drm_atomic_commit(state); 1456 } 1457 1458out: 1459 complete_signaling(dev, state, fence_state, num_fences, !ret); 1460 1461 if (ret == -EDEADLK) { 1462 drm_atomic_state_clear(state); 1463 ret = drm_modeset_backoff(&ctx); 1464 if (!ret) 1465 goto retry; 1466 } 1467 1468 drm_atomic_state_put(state); 1469 1470 drm_modeset_drop_locks(&ctx); 1471 drm_modeset_acquire_fini(&ctx); 1472 1473 return ret; 1474} 1475