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.h> 31 #include <drm/drm_atomic_helper.h> 32 #include <drm/drm_atomic_uapi.h> 33 #include <drm/drm_framebuffer.h> 34 #include <drm/drm_print.h> 35 #include <drm/drm_drv.h> 36 #include <drm/drm_writeback.h> 37 #include <drm/drm_vblank.h> 38 #include <drm/drm_colorop.h> 39 40 #include <linux/export.h> 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 similar. 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 */ 69 int 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 struct drm_property_blob *blob; 84 85 drm_mode_convert_to_umode(&umode, mode); 86 blob = drm_property_create_blob(crtc->dev, 87 sizeof(umode), &umode); 88 if (IS_ERR(blob)) 89 return PTR_ERR(blob); 90 91 drm_mode_copy(&state->mode, mode); 92 93 state->mode_blob = blob; 94 state->enable = true; 95 drm_dbg_atomic(crtc->dev, 96 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 97 mode->name, crtc->base.id, crtc->name, state); 98 } else { 99 memset(&state->mode, 0, sizeof(state->mode)); 100 state->enable = false; 101 drm_dbg_atomic(crtc->dev, 102 "Set [NOMODE] for [CRTC:%d:%s] state %p\n", 103 crtc->base.id, crtc->name, state); 104 } 105 106 return 0; 107 } 108 EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc); 109 110 /** 111 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC 112 * @state: the CRTC whose incoming state to update 113 * @blob: pointer to blob property to use for mode 114 * 115 * Set a mode (originating from a blob property) on the desired CRTC state. 116 * This function will take a reference on the blob property for the CRTC state, 117 * and release the reference held on the state's existing mode property, if any 118 * was set. 119 * 120 * RETURNS: 121 * Zero on success, error code on failure. Cannot return -EDEADLK. 122 */ 123 int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, 124 struct drm_property_blob *blob) 125 { 126 struct drm_crtc *crtc = state->crtc; 127 128 if (blob == state->mode_blob) 129 return 0; 130 131 drm_property_blob_put(state->mode_blob); 132 state->mode_blob = NULL; 133 134 memset(&state->mode, 0, sizeof(state->mode)); 135 136 if (blob) { 137 int ret; 138 139 if (blob->length != sizeof(struct drm_mode_modeinfo)) { 140 drm_dbg_atomic(crtc->dev, 141 "[CRTC:%d:%s] bad mode blob length: %zu\n", 142 crtc->base.id, crtc->name, 143 blob->length); 144 return -EINVAL; 145 } 146 147 ret = drm_mode_convert_umode(crtc->dev, 148 &state->mode, blob->data); 149 if (ret) { 150 drm_dbg_atomic(crtc->dev, 151 "[CRTC:%d:%s] invalid mode (%s, %pe): " DRM_MODE_FMT "\n", 152 crtc->base.id, crtc->name, 153 drm_get_mode_status_name(state->mode.status), 154 ERR_PTR(ret), DRM_MODE_ARG(&state->mode)); 155 return -EINVAL; 156 } 157 158 state->mode_blob = drm_property_blob_get(blob); 159 state->enable = true; 160 drm_dbg_atomic(crtc->dev, 161 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 162 state->mode.name, crtc->base.id, crtc->name, 163 state); 164 } else { 165 state->enable = false; 166 drm_dbg_atomic(crtc->dev, 167 "Set [NOMODE] for [CRTC:%d:%s] state %p\n", 168 crtc->base.id, crtc->name, state); 169 } 170 171 return 0; 172 } 173 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); 174 175 /** 176 * drm_atomic_set_crtc_for_plane - set CRTC for plane 177 * @plane_state: the plane whose incoming state to update 178 * @crtc: CRTC to use for the plane 179 * 180 * Changing the assigned CRTC for a plane requires us to grab the lock and state 181 * for the new CRTC, as needed. This function takes care of all these details 182 * besides updating the pointer in the state object itself. 183 * 184 * Returns: 185 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 186 * then the w/w mutex code has detected a deadlock and the entire atomic 187 * sequence must be restarted. All other errors are fatal. 188 */ 189 int 190 drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, 191 struct drm_crtc *crtc) 192 { 193 struct drm_plane *plane = plane_state->plane; 194 struct drm_crtc_state *crtc_state; 195 /* Nothing to do for same crtc*/ 196 if (plane_state->crtc == crtc) 197 return 0; 198 if (plane_state->crtc) { 199 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 200 plane_state->crtc); 201 if (WARN_ON(IS_ERR(crtc_state))) 202 return PTR_ERR(crtc_state); 203 204 crtc_state->plane_mask &= ~drm_plane_mask(plane); 205 } 206 207 plane_state->crtc = crtc; 208 209 if (crtc) { 210 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 211 crtc); 212 if (IS_ERR(crtc_state)) 213 return PTR_ERR(crtc_state); 214 crtc_state->plane_mask |= drm_plane_mask(plane); 215 } 216 217 if (crtc) 218 drm_dbg_atomic(plane->dev, 219 "Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n", 220 plane->base.id, plane->name, plane_state, 221 crtc->base.id, crtc->name); 222 else 223 drm_dbg_atomic(plane->dev, 224 "Link [PLANE:%d:%s] state %p to [NOCRTC]\n", 225 plane->base.id, plane->name, plane_state); 226 227 return 0; 228 } 229 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane); 230 231 /** 232 * drm_atomic_set_fb_for_plane - set framebuffer for plane 233 * @plane_state: atomic state object for the plane 234 * @fb: fb to use for the plane 235 * 236 * Changing the assigned framebuffer for a plane requires us to grab a reference 237 * to the new fb and drop the reference to the old fb, if there is one. This 238 * function takes care of all these details besides updating the pointer in the 239 * state object itself. 240 */ 241 void 242 drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, 243 struct drm_framebuffer *fb) 244 { 245 struct drm_plane *plane = plane_state->plane; 246 247 if (fb) 248 drm_dbg_atomic(plane->dev, 249 "Set [FB:%d] for [PLANE:%d:%s] state %p\n", 250 fb->base.id, plane->base.id, plane->name, 251 plane_state); 252 else 253 drm_dbg_atomic(plane->dev, 254 "Set [NOFB] for [PLANE:%d:%s] state %p\n", 255 plane->base.id, plane->name, plane_state); 256 257 drm_framebuffer_assign(&plane_state->fb, fb); 258 } 259 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); 260 261 /** 262 * drm_atomic_set_colorop_for_plane - set colorop for plane 263 * @plane_state: atomic state object for the plane 264 * @colorop: colorop to use for the plane 265 * 266 * Helper function to select the color pipeline on a plane by setting 267 * it to the first drm_colorop element of the pipeline. 268 * 269 * Return: true if plane color pipeline value changed, false otherwise. 270 */ 271 bool 272 drm_atomic_set_colorop_for_plane(struct drm_plane_state *plane_state, 273 struct drm_colorop *colorop) 274 { 275 struct drm_plane *plane = plane_state->plane; 276 277 /* Color pipeline didn't change */ 278 if (plane_state->color_pipeline == colorop) 279 return false; 280 281 if (colorop) 282 drm_dbg_atomic(plane->dev, 283 "Set [COLOROP:%d] for [PLANE:%d:%s] state %p\n", 284 colorop->base.id, plane->base.id, plane->name, 285 plane_state); 286 else 287 drm_dbg_atomic(plane->dev, 288 "Set [NOCOLOROP] for [PLANE:%d:%s] state %p\n", 289 plane->base.id, plane->name, plane_state); 290 291 plane_state->color_pipeline = colorop; 292 293 return true; 294 } 295 EXPORT_SYMBOL(drm_atomic_set_colorop_for_plane); 296 297 /** 298 * drm_atomic_set_crtc_for_connector - set CRTC for connector 299 * @conn_state: atomic state object for the connector 300 * @crtc: CRTC to use for the connector 301 * 302 * Changing the assigned CRTC for a connector requires us to grab the lock and 303 * state for the new CRTC, as needed. This function takes care of all these 304 * details besides updating the pointer in the state object itself. 305 * 306 * Returns: 307 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 308 * then the w/w mutex code has detected a deadlock and the entire atomic 309 * sequence must be restarted. All other errors are fatal. 310 */ 311 int 312 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, 313 struct drm_crtc *crtc) 314 { 315 struct drm_connector *connector = conn_state->connector; 316 struct drm_crtc_state *crtc_state; 317 318 if (conn_state->crtc == crtc) 319 return 0; 320 321 if (conn_state->crtc) { 322 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state, 323 conn_state->crtc); 324 325 crtc_state->connector_mask &= 326 ~drm_connector_mask(conn_state->connector); 327 328 drm_connector_put(conn_state->connector); 329 conn_state->crtc = NULL; 330 } 331 332 if (crtc) { 333 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); 334 if (IS_ERR(crtc_state)) 335 return PTR_ERR(crtc_state); 336 337 crtc_state->connector_mask |= 338 drm_connector_mask(conn_state->connector); 339 340 drm_connector_get(conn_state->connector); 341 conn_state->crtc = crtc; 342 343 drm_dbg_atomic(connector->dev, 344 "Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n", 345 connector->base.id, connector->name, 346 conn_state, crtc->base.id, crtc->name); 347 } else { 348 drm_dbg_atomic(connector->dev, 349 "Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n", 350 connector->base.id, connector->name, 351 conn_state); 352 } 353 354 return 0; 355 } 356 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); 357 358 static void set_out_fence_for_crtc(struct drm_atomic_commit *state, 359 struct drm_crtc *crtc, s32 __user *fence_ptr) 360 { 361 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; 362 } 363 364 static s32 __user *get_out_fence_for_crtc(struct drm_atomic_commit *state, 365 struct drm_crtc *crtc) 366 { 367 s32 __user *fence_ptr; 368 369 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; 370 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; 371 372 return fence_ptr; 373 } 374 375 static int set_out_fence_for_connector(struct drm_atomic_commit *state, 376 struct drm_connector *connector, 377 s32 __user *fence_ptr) 378 { 379 unsigned int index = drm_connector_index(connector); 380 381 if (!fence_ptr) 382 return 0; 383 384 if (put_user(-1, fence_ptr)) 385 return -EFAULT; 386 387 state->connectors[index].out_fence_ptr = fence_ptr; 388 389 return 0; 390 } 391 392 static s32 __user *get_out_fence_for_connector(struct drm_atomic_commit *state, 393 struct drm_connector *connector) 394 { 395 unsigned int index = drm_connector_index(connector); 396 s32 __user *fence_ptr; 397 398 fence_ptr = state->connectors[index].out_fence_ptr; 399 state->connectors[index].out_fence_ptr = NULL; 400 401 return fence_ptr; 402 } 403 404 static int drm_atomic_crtc_set_property(struct drm_crtc *crtc, 405 struct drm_crtc_state *state, struct drm_property *property, 406 uint64_t val) 407 { 408 struct drm_device *dev = crtc->dev; 409 struct drm_mode_config *config = &dev->mode_config; 410 bool replaced = false; 411 int ret; 412 413 if (property == config->prop_active) 414 state->active = val; 415 else if (property == config->prop_mode_id) { 416 struct drm_property_blob *mode = 417 drm_property_lookup_blob(dev, val); 418 ret = drm_atomic_set_mode_prop_for_crtc(state, mode); 419 drm_property_blob_put(mode); 420 return ret; 421 } else if (property == config->prop_vrr_enabled) { 422 state->vrr_enabled = val; 423 } else if (property == config->degamma_lut_property) { 424 const size_t elem_size = sizeof(struct drm_color_lut); 425 u64 lut_size; 426 427 ret = drm_object_immutable_property_get_value(&crtc->base, 428 config->degamma_lut_size_property, 429 &lut_size); 430 if (ret) 431 return ret; 432 433 ret = drm_property_replace_blob_from_id(dev, 434 &state->degamma_lut, 435 val, 436 elem_size * lut_size, -1, elem_size, 437 &replaced); 438 state->color_mgmt_changed |= replaced; 439 return ret; 440 } else if (property == config->ctm_property) { 441 ret = drm_property_replace_blob_from_id(dev, 442 &state->ctm, 443 val, 444 -1, sizeof(struct drm_color_ctm), -1, 445 &replaced); 446 state->color_mgmt_changed |= replaced; 447 return ret; 448 } else if (property == config->gamma_lut_property) { 449 const size_t elem_size = sizeof(struct drm_color_lut); 450 u64 lut_size; 451 452 ret = drm_object_immutable_property_get_value(&crtc->base, 453 config->gamma_lut_size_property, 454 &lut_size); 455 if (ret) 456 return ret; 457 458 ret = drm_property_replace_blob_from_id(dev, 459 &state->gamma_lut, 460 val, 461 elem_size * lut_size, -1, elem_size, 462 &replaced); 463 state->color_mgmt_changed |= replaced; 464 return ret; 465 } else if (property == config->background_color_property) { 466 state->background_color = val; 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 (property == crtc->scaling_filter_property) { 478 state->scaling_filter = val; 479 } else if (property == crtc->sharpness_strength_property) { 480 state->sharpness_strength = val; 481 } else if (crtc->funcs->atomic_set_property) { 482 return crtc->funcs->atomic_set_property(crtc, state, property, val); 483 } else { 484 drm_dbg_atomic(crtc->dev, 485 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n", 486 crtc->base.id, crtc->name, 487 property->base.id, property->name); 488 return -EINVAL; 489 } 490 491 return 0; 492 } 493 494 static int 495 drm_atomic_crtc_get_property(struct drm_crtc *crtc, 496 const struct drm_crtc_state *state, 497 struct drm_property *property, uint64_t *val) 498 { 499 struct drm_device *dev = crtc->dev; 500 struct drm_mode_config *config = &dev->mode_config; 501 502 if (property == config->prop_active) 503 *val = drm_atomic_crtc_effectively_active(state); 504 else if (property == config->prop_mode_id) 505 *val = (state->mode_blob) ? state->mode_blob->base.id : 0; 506 else if (property == config->prop_vrr_enabled) 507 *val = state->vrr_enabled; 508 else if (property == config->degamma_lut_property) 509 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; 510 else if (property == config->ctm_property) 511 *val = (state->ctm) ? state->ctm->base.id : 0; 512 else if (property == config->gamma_lut_property) 513 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; 514 else if (property == config->background_color_property) 515 *val = state->background_color; 516 else if (property == config->prop_out_fence_ptr) 517 *val = 0; 518 else if (property == crtc->scaling_filter_property) 519 *val = state->scaling_filter; 520 else if (property == crtc->sharpness_strength_property) 521 *val = state->sharpness_strength; 522 else if (crtc->funcs->atomic_get_property) 523 return crtc->funcs->atomic_get_property(crtc, state, property, val); 524 else { 525 drm_dbg_atomic(dev, 526 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n", 527 crtc->base.id, crtc->name, 528 property->base.id, property->name); 529 return -EINVAL; 530 } 531 532 return 0; 533 } 534 535 static int drm_atomic_plane_set_property(struct drm_plane *plane, 536 struct drm_plane_state *state, struct drm_file *file_priv, 537 struct drm_property *property, uint64_t val) 538 { 539 struct drm_device *dev = plane->dev; 540 struct drm_mode_config *config = &dev->mode_config; 541 bool replaced = false; 542 int ret; 543 544 if (property == config->prop_fb_id) { 545 struct drm_framebuffer *fb; 546 547 fb = drm_framebuffer_lookup(dev, file_priv, val); 548 drm_atomic_set_fb_for_plane(state, fb); 549 if (fb) 550 drm_framebuffer_put(fb); 551 } else if (property == config->prop_in_fence_fd) { 552 if (state->fence) 553 return -EINVAL; 554 555 if (U642I64(val) == -1) 556 return 0; 557 558 state->fence = sync_file_get_fence(val); 559 if (!state->fence) 560 return -EINVAL; 561 562 } else if (property == config->prop_crtc_id) { 563 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 564 565 if (val && !crtc) { 566 drm_dbg_atomic(dev, 567 "[PROP:%d:%s] cannot find CRTC with ID %llu\n", 568 property->base.id, property->name, val); 569 return -EACCES; 570 } 571 return drm_atomic_set_crtc_for_plane(state, crtc); 572 } else if (property == config->prop_crtc_x) { 573 state->crtc_x = U642I64(val); 574 } else if (property == config->prop_crtc_y) { 575 state->crtc_y = U642I64(val); 576 } else if (property == config->prop_crtc_w) { 577 state->crtc_w = val; 578 } else if (property == config->prop_crtc_h) { 579 state->crtc_h = val; 580 } else if (property == config->prop_src_x) { 581 state->src_x = val; 582 } else if (property == config->prop_src_y) { 583 state->src_y = val; 584 } else if (property == config->prop_src_w) { 585 state->src_w = val; 586 } else if (property == config->prop_src_h) { 587 state->src_h = val; 588 } else if (property == plane->alpha_property) { 589 state->alpha = val; 590 } else if (property == plane->blend_mode_property) { 591 state->pixel_blend_mode = val; 592 } else if (property == plane->rotation_property) { 593 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) { 594 drm_dbg_atomic(plane->dev, 595 "[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n", 596 plane->base.id, plane->name, val); 597 return -EINVAL; 598 } 599 state->rotation = val; 600 } else if (property == plane->zpos_property) { 601 state->zpos = val; 602 } else if (property == plane->color_encoding_property) { 603 state->color_encoding = val; 604 } else if (property == plane->color_range_property) { 605 state->color_range = val; 606 } else if (property == plane->color_pipeline_property) { 607 /* find DRM colorop object */ 608 struct drm_colorop *colorop = NULL; 609 610 colorop = drm_colorop_find(dev, file_priv, val); 611 612 if (val && !colorop) 613 return -EACCES; 614 615 state->color_mgmt_changed |= drm_atomic_set_colorop_for_plane(state, colorop); 616 } else if (property == config->prop_fb_damage_clips) { 617 ret = drm_property_replace_blob_from_id(dev, 618 &state->fb_damage_clips, 619 val, 620 -1, -1, sizeof(struct drm_mode_rect), 621 &replaced); 622 return ret; 623 } else if (property == plane->scaling_filter_property) { 624 state->scaling_filter = val; 625 } else if (plane->funcs->atomic_set_property) { 626 return plane->funcs->atomic_set_property(plane, state, 627 property, val); 628 } else if (property == plane->hotspot_x_property) { 629 if (plane->type != DRM_PLANE_TYPE_CURSOR) { 630 drm_dbg_atomic(plane->dev, 631 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n", 632 plane->base.id, plane->name, val); 633 return -EINVAL; 634 } 635 state->hotspot_x = val; 636 } else if (property == plane->hotspot_y_property) { 637 if (plane->type != DRM_PLANE_TYPE_CURSOR) { 638 drm_dbg_atomic(plane->dev, 639 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n", 640 plane->base.id, plane->name, val); 641 return -EINVAL; 642 } 643 state->hotspot_y = val; 644 } else { 645 drm_dbg_atomic(plane->dev, 646 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n", 647 plane->base.id, plane->name, 648 property->base.id, property->name); 649 return -EINVAL; 650 } 651 652 return 0; 653 } 654 655 static int 656 drm_atomic_plane_get_property(struct drm_plane *plane, 657 const struct drm_plane_state *state, 658 struct drm_property *property, uint64_t *val) 659 { 660 struct drm_device *dev = plane->dev; 661 struct drm_mode_config *config = &dev->mode_config; 662 663 if (property == config->prop_fb_id) { 664 *val = (state->fb) ? state->fb->base.id : 0; 665 } else if (property == config->prop_in_fence_fd) { 666 *val = -1; 667 } else if (property == config->prop_crtc_id) { 668 *val = (state->crtc) ? state->crtc->base.id : 0; 669 } else if (property == config->prop_crtc_x) { 670 *val = I642U64(state->crtc_x); 671 } else if (property == config->prop_crtc_y) { 672 *val = I642U64(state->crtc_y); 673 } else if (property == config->prop_crtc_w) { 674 *val = state->crtc_w; 675 } else if (property == config->prop_crtc_h) { 676 *val = state->crtc_h; 677 } else if (property == config->prop_src_x) { 678 *val = state->src_x; 679 } else if (property == config->prop_src_y) { 680 *val = state->src_y; 681 } else if (property == config->prop_src_w) { 682 *val = state->src_w; 683 } else if (property == config->prop_src_h) { 684 *val = state->src_h; 685 } else if (property == plane->alpha_property) { 686 *val = state->alpha; 687 } else if (property == plane->blend_mode_property) { 688 *val = state->pixel_blend_mode; 689 } else if (property == plane->rotation_property) { 690 *val = state->rotation; 691 } else if (property == plane->zpos_property) { 692 *val = state->zpos; 693 } else if (property == plane->color_encoding_property) { 694 *val = state->color_encoding; 695 } else if (property == plane->color_range_property) { 696 *val = state->color_range; 697 } else if (property == plane->color_pipeline_property) { 698 *val = (state->color_pipeline) ? state->color_pipeline->base.id : 0; 699 } else if (property == config->prop_fb_damage_clips) { 700 *val = (state->fb_damage_clips) ? 701 state->fb_damage_clips->base.id : 0; 702 } else if (property == plane->scaling_filter_property) { 703 *val = state->scaling_filter; 704 } else if (plane->funcs->atomic_get_property) { 705 return plane->funcs->atomic_get_property(plane, state, property, val); 706 } else if (property == plane->hotspot_x_property) { 707 *val = state->hotspot_x; 708 } else if (property == plane->hotspot_y_property) { 709 *val = state->hotspot_y; 710 } else { 711 drm_dbg_atomic(dev, 712 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n", 713 plane->base.id, plane->name, 714 property->base.id, property->name); 715 return -EINVAL; 716 } 717 718 return 0; 719 } 720 721 static int drm_atomic_color_set_data_property(struct drm_colorop *colorop, 722 struct drm_colorop_state *state, 723 struct drm_property *property, 724 uint64_t val, 725 bool *replaced) 726 { 727 ssize_t elem_size = -1; 728 ssize_t size = -1; 729 730 switch (colorop->type) { 731 case DRM_COLOROP_1D_LUT: 732 size = colorop->size * sizeof(struct drm_color_lut32); 733 break; 734 case DRM_COLOROP_CTM_3X4: 735 size = sizeof(struct drm_color_ctm_3x4); 736 break; 737 case DRM_COLOROP_3D_LUT: 738 size = colorop->size * colorop->size * colorop->size * 739 sizeof(struct drm_color_lut32); 740 break; 741 default: 742 /* should never get here */ 743 return -EINVAL; 744 } 745 746 return drm_property_replace_blob_from_id(colorop->dev, 747 &state->data, 748 val, 749 -1, size, elem_size, 750 replaced); 751 } 752 753 static int drm_atomic_colorop_set_property(struct drm_colorop *colorop, 754 struct drm_colorop_state *state, 755 struct drm_file *file_priv, 756 struct drm_property *property, 757 uint64_t val, 758 bool *replaced) 759 { 760 if (property == colorop->bypass_property) { 761 if (state->bypass != val) { 762 state->bypass = val; 763 *replaced = true; 764 } 765 } else if (property == colorop->lut1d_interpolation_property) { 766 if (state->lut1d_interpolation != val) { 767 state->lut1d_interpolation = val; 768 *replaced = true; 769 } 770 } else if (property == colorop->curve_1d_type_property) { 771 if (state->curve_1d_type != val) { 772 state->curve_1d_type = val; 773 *replaced = true; 774 } 775 } else if (property == colorop->multiplier_property) { 776 if (state->multiplier != val) { 777 state->multiplier = val; 778 *replaced = true; 779 } 780 } else if (property == colorop->lut3d_interpolation_property) { 781 if (state->lut3d_interpolation != val) { 782 state->lut3d_interpolation = val; 783 *replaced = true; 784 } 785 } else if (property == colorop->data_property) { 786 return drm_atomic_color_set_data_property(colorop, state, 787 property, val, 788 replaced); 789 } else { 790 drm_dbg_atomic(colorop->dev, 791 "[COLOROP:%d:%d] unknown property [PROP:%d:%s]\n", 792 colorop->base.id, colorop->type, 793 property->base.id, property->name); 794 return -EINVAL; 795 } 796 797 return 0; 798 } 799 800 static int 801 drm_atomic_colorop_get_property(struct drm_colorop *colorop, 802 const struct drm_colorop_state *state, 803 struct drm_property *property, uint64_t *val) 804 { 805 if (property == colorop->type_property) 806 *val = colorop->type; 807 else if (property == colorop->bypass_property) 808 *val = state->bypass; 809 else if (property == colorop->lut1d_interpolation_property) 810 *val = state->lut1d_interpolation; 811 else if (property == colorop->curve_1d_type_property) 812 *val = state->curve_1d_type; 813 else if (property == colorop->multiplier_property) 814 *val = state->multiplier; 815 else if (property == colorop->size_property) 816 *val = colorop->size; 817 else if (property == colorop->lut3d_interpolation_property) 818 *val = state->lut3d_interpolation; 819 else if (property == colorop->data_property) 820 *val = (state->data) ? state->data->base.id : 0; 821 else 822 return -EINVAL; 823 824 return 0; 825 } 826 827 static int drm_atomic_set_writeback_fb_for_connector( 828 struct drm_connector_state *conn_state, 829 struct drm_framebuffer *fb) 830 { 831 int ret; 832 struct drm_connector *conn = conn_state->connector; 833 834 ret = drm_writeback_set_fb(conn_state, fb); 835 if (ret < 0) 836 return ret; 837 838 if (fb) 839 drm_dbg_atomic(conn->dev, 840 "Set [FB:%d] for connector state %p\n", 841 fb->base.id, conn_state); 842 else 843 drm_dbg_atomic(conn->dev, 844 "Set [NOFB] for connector state %p\n", 845 conn_state); 846 847 return 0; 848 } 849 850 static int drm_atomic_connector_set_property(struct drm_connector *connector, 851 struct drm_connector_state *state, struct drm_file *file_priv, 852 struct drm_property *property, uint64_t val) 853 { 854 struct drm_device *dev = connector->dev; 855 struct drm_mode_config *config = &dev->mode_config; 856 bool replaced = false; 857 int ret; 858 859 if (property == config->prop_crtc_id) { 860 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 861 862 if (val && !crtc) { 863 drm_dbg_atomic(dev, 864 "[PROP:%d:%s] cannot find CRTC with ID %llu\n", 865 property->base.id, property->name, val); 866 return -EACCES; 867 } 868 return drm_atomic_set_crtc_for_connector(state, crtc); 869 } else if (property == config->dpms_property) { 870 /* setting DPMS property requires special handling, which 871 * is done in legacy setprop path for us. Disallow (for 872 * now?) atomic writes to DPMS property: 873 */ 874 drm_dbg_atomic(dev, 875 "legacy [PROP:%d:%s] can only be set via legacy uAPI\n", 876 property->base.id, property->name); 877 return -EINVAL; 878 } else if (property == config->tv_select_subconnector_property) { 879 state->tv.select_subconnector = val; 880 } else if (property == config->tv_subconnector_property) { 881 state->tv.subconnector = val; 882 } else if (property == config->tv_left_margin_property) { 883 state->tv.margins.left = val; 884 } else if (property == config->tv_right_margin_property) { 885 state->tv.margins.right = val; 886 } else if (property == config->tv_top_margin_property) { 887 state->tv.margins.top = val; 888 } else if (property == config->tv_bottom_margin_property) { 889 state->tv.margins.bottom = val; 890 } else if (property == config->legacy_tv_mode_property) { 891 state->tv.legacy_mode = val; 892 } else if (property == config->tv_mode_property) { 893 state->tv.mode = val; 894 } else if (property == config->tv_brightness_property) { 895 state->tv.brightness = val; 896 } else if (property == config->tv_contrast_property) { 897 state->tv.contrast = val; 898 } else if (property == config->tv_flicker_reduction_property) { 899 state->tv.flicker_reduction = val; 900 } else if (property == config->tv_overscan_property) { 901 state->tv.overscan = val; 902 } else if (property == config->tv_saturation_property) { 903 state->tv.saturation = val; 904 } else if (property == config->tv_hue_property) { 905 state->tv.hue = val; 906 } else if (property == config->link_status_property) { 907 /* Never downgrade from GOOD to BAD on userspace's request here, 908 * only hw issues can do that. 909 * 910 * For an atomic property the userspace doesn't need to be able 911 * to understand all the properties, but needs to be able to 912 * restore the state it wants on VT switch. So if the userspace 913 * tries to change the link_status from GOOD to BAD, driver 914 * silently rejects it and returns a 0. This prevents userspace 915 * from accidentally breaking the display when it restores the 916 * state. 917 */ 918 if (state->link_status != DRM_LINK_STATUS_GOOD) 919 state->link_status = val; 920 } else if (property == config->hdr_output_metadata_property) { 921 ret = drm_property_replace_blob_from_id(dev, 922 &state->hdr_output_metadata, 923 val, 924 -1, sizeof(struct hdr_output_metadata), -1, 925 &replaced); 926 return ret; 927 } else if (property == config->aspect_ratio_property) { 928 state->picture_aspect_ratio = val; 929 } else if (property == config->content_type_property) { 930 state->content_type = val; 931 } else if (property == connector->scaling_mode_property) { 932 state->scaling_mode = val; 933 } else if (property == config->content_protection_property) { 934 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) { 935 drm_dbg_kms(dev, "only drivers can set CP Enabled\n"); 936 return -EINVAL; 937 } 938 state->content_protection = val; 939 } else if (property == config->hdcp_content_type_property) { 940 state->hdcp_content_type = val; 941 } else if (property == connector->colorspace_property) { 942 state->colorspace = val; 943 } else if (property == config->writeback_fb_id_property) { 944 struct drm_framebuffer *fb; 945 int ret; 946 947 fb = drm_framebuffer_lookup(dev, file_priv, val); 948 ret = drm_atomic_set_writeback_fb_for_connector(state, fb); 949 if (fb) 950 drm_framebuffer_put(fb); 951 return ret; 952 } else if (property == config->writeback_out_fence_ptr_property) { 953 s32 __user *fence_ptr = u64_to_user_ptr(val); 954 955 return set_out_fence_for_connector(state->state, connector, 956 fence_ptr); 957 } else if (property == connector->max_bpc_property) { 958 state->max_requested_bpc = val; 959 } else if (property == connector->privacy_screen_sw_state_property) { 960 state->privacy_screen_sw_state = val; 961 } else if (property == connector->broadcast_rgb_property) { 962 state->hdmi.broadcast_rgb = val; 963 } else if (connector->funcs->atomic_set_property) { 964 return connector->funcs->atomic_set_property(connector, 965 state, property, val); 966 } else { 967 drm_dbg_atomic(connector->dev, 968 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n", 969 connector->base.id, connector->name, 970 property->base.id, property->name); 971 return -EINVAL; 972 } 973 974 return 0; 975 } 976 977 static int 978 drm_atomic_connector_get_property(struct drm_connector *connector, 979 const struct drm_connector_state *state, 980 struct drm_property *property, uint64_t *val) 981 { 982 struct drm_device *dev = connector->dev; 983 struct drm_mode_config *config = &dev->mode_config; 984 985 if (property == config->prop_crtc_id) { 986 *val = (state->crtc) ? state->crtc->base.id : 0; 987 } else if (property == config->dpms_property) { 988 if (state->crtc && state->crtc->state->self_refresh_active) 989 *val = DRM_MODE_DPMS_ON; 990 else 991 *val = connector->dpms; 992 } else if (property == config->tv_select_subconnector_property) { 993 *val = state->tv.select_subconnector; 994 } else if (property == config->tv_subconnector_property) { 995 *val = state->tv.subconnector; 996 } else if (property == config->tv_left_margin_property) { 997 *val = state->tv.margins.left; 998 } else if (property == config->tv_right_margin_property) { 999 *val = state->tv.margins.right; 1000 } else if (property == config->tv_top_margin_property) { 1001 *val = state->tv.margins.top; 1002 } else if (property == config->tv_bottom_margin_property) { 1003 *val = state->tv.margins.bottom; 1004 } else if (property == config->legacy_tv_mode_property) { 1005 *val = state->tv.legacy_mode; 1006 } else if (property == config->tv_mode_property) { 1007 *val = state->tv.mode; 1008 } else if (property == config->tv_brightness_property) { 1009 *val = state->tv.brightness; 1010 } else if (property == config->tv_contrast_property) { 1011 *val = state->tv.contrast; 1012 } else if (property == config->tv_flicker_reduction_property) { 1013 *val = state->tv.flicker_reduction; 1014 } else if (property == config->tv_overscan_property) { 1015 *val = state->tv.overscan; 1016 } else if (property == config->tv_saturation_property) { 1017 *val = state->tv.saturation; 1018 } else if (property == config->tv_hue_property) { 1019 *val = state->tv.hue; 1020 } else if (property == config->link_status_property) { 1021 *val = state->link_status; 1022 } else if (property == config->aspect_ratio_property) { 1023 *val = state->picture_aspect_ratio; 1024 } else if (property == config->content_type_property) { 1025 *val = state->content_type; 1026 } else if (property == connector->colorspace_property) { 1027 *val = state->colorspace; 1028 } else if (property == connector->scaling_mode_property) { 1029 *val = state->scaling_mode; 1030 } else if (property == config->hdr_output_metadata_property) { 1031 *val = state->hdr_output_metadata ? 1032 state->hdr_output_metadata->base.id : 0; 1033 } else if (property == config->content_protection_property) { 1034 *val = state->content_protection; 1035 } else if (property == config->hdcp_content_type_property) { 1036 *val = state->hdcp_content_type; 1037 } else if (property == config->writeback_fb_id_property) { 1038 /* Writeback framebuffer is one-shot, write and forget */ 1039 *val = 0; 1040 } else if (property == config->writeback_out_fence_ptr_property) { 1041 *val = 0; 1042 } else if (property == connector->max_bpc_property) { 1043 *val = state->max_requested_bpc; 1044 } else if (property == connector->privacy_screen_sw_state_property) { 1045 *val = state->privacy_screen_sw_state; 1046 } else if (property == connector->broadcast_rgb_property) { 1047 *val = state->hdmi.broadcast_rgb; 1048 } else if (connector->funcs->atomic_get_property) { 1049 return connector->funcs->atomic_get_property(connector, 1050 state, property, val); 1051 } else { 1052 drm_dbg_atomic(dev, 1053 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n", 1054 connector->base.id, connector->name, 1055 property->base.id, property->name); 1056 return -EINVAL; 1057 } 1058 1059 return 0; 1060 } 1061 1062 int drm_atomic_get_property(struct drm_mode_object *obj, 1063 struct drm_property *property, uint64_t *val) 1064 { 1065 struct drm_device *dev = property->dev; 1066 int ret; 1067 1068 switch (obj->type) { 1069 case DRM_MODE_OBJECT_CONNECTOR: { 1070 struct drm_connector *connector = obj_to_connector(obj); 1071 1072 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 1073 ret = drm_atomic_connector_get_property(connector, 1074 connector->state, property, val); 1075 break; 1076 } 1077 case DRM_MODE_OBJECT_CRTC: { 1078 struct drm_crtc *crtc = obj_to_crtc(obj); 1079 1080 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 1081 ret = drm_atomic_crtc_get_property(crtc, 1082 crtc->state, property, val); 1083 break; 1084 } 1085 case DRM_MODE_OBJECT_PLANE: { 1086 struct drm_plane *plane = obj_to_plane(obj); 1087 1088 WARN_ON(!drm_modeset_is_locked(&plane->mutex)); 1089 ret = drm_atomic_plane_get_property(plane, 1090 plane->state, property, val); 1091 break; 1092 } 1093 case DRM_MODE_OBJECT_COLOROP: { 1094 struct drm_colorop *colorop = obj_to_colorop(obj); 1095 1096 if (colorop->plane) 1097 WARN_ON(!drm_modeset_is_locked(&colorop->plane->mutex)); 1098 1099 ret = drm_atomic_colorop_get_property(colorop, colorop->state, property, val); 1100 break; 1101 } 1102 default: 1103 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties\n", obj->id); 1104 ret = -EINVAL; 1105 break; 1106 } 1107 1108 return ret; 1109 } 1110 1111 /* 1112 * The big monster ioctl 1113 */ 1114 1115 static struct drm_pending_vblank_event *create_vblank_event( 1116 struct drm_crtc *crtc, uint64_t user_data) 1117 { 1118 struct drm_pending_vblank_event *e = NULL; 1119 1120 e = kzalloc_obj(*e); 1121 if (!e) 1122 return NULL; 1123 1124 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 1125 e->event.base.length = sizeof(e->event); 1126 e->event.vbl.crtc_id = crtc->base.id; 1127 e->event.vbl.user_data = user_data; 1128 1129 return e; 1130 } 1131 1132 int drm_atomic_connector_commit_dpms(struct drm_atomic_commit *state, 1133 struct drm_connector *connector, 1134 int mode) 1135 { 1136 struct drm_connector *tmp_connector; 1137 struct drm_connector_state *new_conn_state; 1138 struct drm_crtc *crtc; 1139 struct drm_crtc_state *crtc_state; 1140 int i, ret, old_mode = connector->dpms; 1141 bool active = false; 1142 1143 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, 1144 state->acquire_ctx); 1145 if (ret) 1146 return ret; 1147 1148 if (mode != DRM_MODE_DPMS_ON) 1149 mode = DRM_MODE_DPMS_OFF; 1150 1151 if (connector->dpms == mode) 1152 goto out; 1153 1154 connector->dpms = mode; 1155 1156 crtc = connector->state->crtc; 1157 if (!crtc) 1158 goto out; 1159 ret = drm_atomic_add_affected_connectors(state, crtc); 1160 if (ret) 1161 goto out; 1162 1163 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1164 if (IS_ERR(crtc_state)) { 1165 ret = PTR_ERR(crtc_state); 1166 goto out; 1167 } 1168 1169 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) { 1170 if (new_conn_state->crtc != crtc) 1171 continue; 1172 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { 1173 active = true; 1174 break; 1175 } 1176 } 1177 1178 crtc_state->active = active; 1179 ret = drm_atomic_commit(state); 1180 out: 1181 if (ret != 0) 1182 connector->dpms = old_mode; 1183 return ret; 1184 } 1185 1186 static int drm_atomic_check_prop_changes(int ret, uint64_t old_val, uint64_t prop_value, 1187 struct drm_property *prop) 1188 { 1189 if (ret != 0 || old_val != prop_value) { 1190 drm_dbg_atomic(prop->dev, 1191 "[PROP:%d:%s] No prop can be changed during async flip\n", 1192 prop->base.id, prop->name); 1193 return -EINVAL; 1194 } 1195 1196 return 0; 1197 } 1198 1199 int drm_atomic_set_property(struct drm_atomic_commit *state, 1200 struct drm_file *file_priv, 1201 struct drm_mode_object *obj, 1202 struct drm_property *prop, 1203 u64 prop_value, 1204 bool async_flip) 1205 { 1206 struct drm_mode_object *ref; 1207 u64 old_val; 1208 int ret; 1209 1210 if (!drm_property_change_valid_get(prop, prop_value, &ref)) 1211 return -EINVAL; 1212 1213 switch (obj->type) { 1214 case DRM_MODE_OBJECT_CONNECTOR: { 1215 struct drm_connector *connector = obj_to_connector(obj); 1216 struct drm_connector_state *connector_state; 1217 1218 connector_state = drm_atomic_get_connector_state(state, connector); 1219 if (IS_ERR(connector_state)) { 1220 ret = PTR_ERR(connector_state); 1221 break; 1222 } 1223 1224 if (async_flip) { 1225 ret = drm_atomic_connector_get_property(connector, connector_state, 1226 prop, &old_val); 1227 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 1228 break; 1229 } 1230 1231 ret = drm_atomic_connector_set_property(connector, 1232 connector_state, file_priv, 1233 prop, prop_value); 1234 break; 1235 } 1236 case DRM_MODE_OBJECT_CRTC: { 1237 struct drm_crtc *crtc = obj_to_crtc(obj); 1238 struct drm_crtc_state *crtc_state; 1239 1240 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1241 if (IS_ERR(crtc_state)) { 1242 ret = PTR_ERR(crtc_state); 1243 break; 1244 } 1245 1246 if (async_flip) { 1247 ret = drm_atomic_crtc_get_property(crtc, crtc_state, 1248 prop, &old_val); 1249 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 1250 break; 1251 } 1252 1253 ret = drm_atomic_crtc_set_property(crtc, 1254 crtc_state, prop, prop_value); 1255 break; 1256 } 1257 case DRM_MODE_OBJECT_PLANE: { 1258 struct drm_plane *plane = obj_to_plane(obj); 1259 struct drm_plane_state *plane_state; 1260 struct drm_mode_config *config = &plane->dev->mode_config; 1261 const struct drm_plane_helper_funcs *plane_funcs = plane->helper_private; 1262 1263 plane_state = drm_atomic_get_plane_state(state, plane); 1264 if (IS_ERR(plane_state)) { 1265 ret = PTR_ERR(plane_state); 1266 break; 1267 } 1268 1269 if (async_flip) { 1270 /* no-op changes are always allowed */ 1271 ret = drm_atomic_plane_get_property(plane, plane_state, 1272 prop, &old_val); 1273 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 1274 1275 /* fail everything that isn't no-op or a pure flip */ 1276 if (ret && prop != config->prop_fb_id && 1277 prop != config->prop_in_fence_fd && 1278 prop != config->prop_fb_damage_clips) { 1279 break; 1280 } 1281 1282 if (ret && plane->type != DRM_PLANE_TYPE_PRIMARY) { 1283 /* ask the driver if this non-primary plane is supported */ 1284 if (plane_funcs && plane_funcs->atomic_async_check) 1285 ret = plane_funcs->atomic_async_check(plane, state, true); 1286 1287 if (ret) { 1288 drm_dbg_atomic(prop->dev, 1289 "[PLANE:%d:%s] does not support async flips\n", 1290 obj->id, plane->name); 1291 break; 1292 } 1293 } 1294 } 1295 1296 ret = drm_atomic_plane_set_property(plane, 1297 plane_state, file_priv, 1298 prop, prop_value); 1299 1300 break; 1301 } 1302 case DRM_MODE_OBJECT_COLOROP: { 1303 struct drm_plane_state *plane_state; 1304 struct drm_colorop *colorop = obj_to_colorop(obj); 1305 struct drm_colorop_state *colorop_state; 1306 bool replaced = false; 1307 1308 colorop_state = drm_atomic_get_colorop_state(state, colorop); 1309 if (IS_ERR(colorop_state)) { 1310 ret = PTR_ERR(colorop_state); 1311 break; 1312 } 1313 1314 ret = drm_atomic_colorop_set_property(colorop, colorop_state, 1315 file_priv, prop, prop_value, 1316 &replaced); 1317 if (ret || !replaced) 1318 break; 1319 1320 plane_state = drm_atomic_get_plane_state(state, colorop->plane); 1321 if (IS_ERR(plane_state)) { 1322 ret = PTR_ERR(plane_state); 1323 break; 1324 } 1325 plane_state->color_mgmt_changed |= replaced; 1326 1327 break; 1328 } 1329 default: 1330 drm_dbg_atomic(prop->dev, "[OBJECT:%d] has no properties\n", obj->id); 1331 ret = -EINVAL; 1332 break; 1333 } 1334 1335 drm_property_change_valid_put(prop, ref); 1336 return ret; 1337 } 1338 1339 /** 1340 * DOC: explicit fencing properties 1341 * 1342 * Explicit fencing allows userspace to control the buffer synchronization 1343 * between devices. A Fence or a group of fences are transferred to/from 1344 * userspace using Sync File fds and there are two DRM properties for that. 1345 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and 1346 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. 1347 * 1348 * As a contrast, with implicit fencing the kernel keeps track of any 1349 * ongoing rendering, and automatically ensures that the atomic update waits 1350 * for any pending rendering to complete. This is usually tracked in &struct 1351 * dma_resv which can also contain mandatory kernel fences. Implicit syncing 1352 * is how Linux traditionally worked (e.g. DRI2/3 on X.org), whereas explicit 1353 * fencing is what Android wants. 1354 * 1355 * "IN_FENCE_FD”: 1356 * Use this property to pass a fence that DRM should wait on before 1357 * proceeding with the Atomic Commit request and show the framebuffer for 1358 * the plane on the screen. The fence can be either a normal fence or a 1359 * merged one, the sync_file framework will handle both cases and use a 1360 * fence_array if a merged fence is received. Passing -1 here means no 1361 * fences to wait on. 1362 * 1363 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag 1364 * it will only check if the Sync File is a valid one. 1365 * 1366 * On the driver side the fence is stored on the @fence parameter of 1367 * &struct drm_plane_state. Drivers which also support implicit fencing 1368 * should extract the implicit fence using drm_gem_plane_helper_prepare_fb(), 1369 * to make sure there's consistent behaviour between drivers in precedence 1370 * of implicit vs. explicit fencing. 1371 * 1372 * "OUT_FENCE_PTR”: 1373 * Use this property to pass a file descriptor pointer to DRM. Once the 1374 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with 1375 * the file descriptor number of a Sync File. This Sync File contains the 1376 * CRTC fence that will be signaled when all framebuffers present on the 1377 * Atomic Commit * request for that given CRTC are scanned out on the 1378 * screen. 1379 * 1380 * The Atomic Commit request fails if a invalid pointer is passed. If the 1381 * Atomic Commit request fails for any other reason the out fence fd 1382 * returned will be -1. On a Atomic Commit with the 1383 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. 1384 * 1385 * Note that out-fences don't have a special interface to drivers and are 1386 * internally represented by a &struct drm_pending_vblank_event in struct 1387 * &drm_crtc_state, which is also used by the nonblocking atomic commit 1388 * helpers and for the DRM event handling for existing userspace. 1389 */ 1390 1391 struct drm_out_fence_state { 1392 s32 __user *out_fence_ptr; 1393 struct sync_file *sync_file; 1394 int fd; 1395 }; 1396 1397 static int setup_out_fence(struct drm_out_fence_state *fence_state, 1398 struct dma_fence *fence) 1399 { 1400 fence_state->fd = get_unused_fd_flags(O_CLOEXEC); 1401 if (fence_state->fd < 0) 1402 return fence_state->fd; 1403 1404 if (put_user(fence_state->fd, fence_state->out_fence_ptr)) 1405 return -EFAULT; 1406 1407 fence_state->sync_file = sync_file_create(fence); 1408 if (!fence_state->sync_file) 1409 return -ENOMEM; 1410 1411 return 0; 1412 } 1413 1414 static int prepare_signaling(struct drm_device *dev, 1415 struct drm_atomic_commit *state, 1416 struct drm_mode_atomic *arg, 1417 struct drm_file *file_priv, 1418 struct drm_out_fence_state **fence_state, 1419 unsigned int *num_fences) 1420 { 1421 struct drm_crtc *crtc; 1422 struct drm_crtc_state *crtc_state; 1423 struct drm_connector *conn; 1424 struct drm_connector_state *conn_state; 1425 int i, c = 0, ret; 1426 1427 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) 1428 return 0; 1429 1430 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1431 s32 __user *fence_ptr; 1432 1433 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); 1434 1435 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { 1436 struct drm_pending_vblank_event *e; 1437 1438 e = create_vblank_event(crtc, arg->user_data); 1439 if (!e) 1440 return -ENOMEM; 1441 1442 crtc_state->event = e; 1443 } 1444 1445 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { 1446 struct drm_pending_vblank_event *e = crtc_state->event; 1447 1448 if (!file_priv) 1449 continue; 1450 1451 ret = drm_event_reserve_init(dev, file_priv, &e->base, 1452 &e->event.base); 1453 if (ret) { 1454 kfree(e); 1455 crtc_state->event = NULL; 1456 return ret; 1457 } 1458 } 1459 1460 if (fence_ptr) { 1461 struct dma_fence *fence; 1462 struct drm_out_fence_state *f; 1463 1464 f = krealloc(*fence_state, sizeof(**fence_state) * 1465 (*num_fences + 1), GFP_KERNEL); 1466 if (!f) 1467 return -ENOMEM; 1468 1469 memset(&f[*num_fences], 0, sizeof(*f)); 1470 1471 f[*num_fences].out_fence_ptr = fence_ptr; 1472 *fence_state = f; 1473 1474 fence = drm_crtc_create_fence(crtc); 1475 if (!fence) 1476 return -ENOMEM; 1477 1478 ret = setup_out_fence(&f[(*num_fences)++], fence); 1479 if (ret) { 1480 dma_fence_put(fence); 1481 return ret; 1482 } 1483 1484 crtc_state->event->base.fence = fence; 1485 } 1486 1487 c++; 1488 } 1489 1490 for_each_new_connector_in_state(state, conn, conn_state, i) { 1491 struct drm_writeback_connector *wb_conn; 1492 struct drm_out_fence_state *f; 1493 struct dma_fence *fence; 1494 s32 __user *fence_ptr; 1495 1496 if (!conn_state->writeback_job) 1497 continue; 1498 1499 fence_ptr = get_out_fence_for_connector(state, conn); 1500 if (!fence_ptr) 1501 continue; 1502 1503 f = krealloc(*fence_state, sizeof(**fence_state) * 1504 (*num_fences + 1), GFP_KERNEL); 1505 if (!f) 1506 return -ENOMEM; 1507 1508 memset(&f[*num_fences], 0, sizeof(*f)); 1509 1510 f[*num_fences].out_fence_ptr = fence_ptr; 1511 *fence_state = f; 1512 1513 wb_conn = drm_connector_to_writeback(conn); 1514 fence = drm_writeback_get_out_fence(wb_conn); 1515 if (!fence) 1516 return -ENOMEM; 1517 1518 ret = setup_out_fence(&f[(*num_fences)++], fence); 1519 if (ret) { 1520 dma_fence_put(fence); 1521 return ret; 1522 } 1523 1524 conn_state->writeback_job->out_fence = fence; 1525 } 1526 1527 /* 1528 * Having this flag means user mode pends on event which will never 1529 * reach due to lack of at least one CRTC for signaling 1530 */ 1531 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { 1532 drm_dbg_atomic(dev, "need at least one CRTC for DRM_MODE_PAGE_FLIP_EVENT"); 1533 return -EINVAL; 1534 } 1535 1536 return 0; 1537 } 1538 1539 static void complete_signaling(struct drm_device *dev, 1540 struct drm_atomic_commit *state, 1541 struct drm_out_fence_state *fence_state, 1542 unsigned int num_fences, 1543 bool install_fds) 1544 { 1545 struct drm_crtc *crtc; 1546 struct drm_crtc_state *crtc_state; 1547 int i; 1548 1549 if (install_fds) { 1550 for (i = 0; i < num_fences; i++) 1551 fd_install(fence_state[i].fd, 1552 fence_state[i].sync_file->file); 1553 1554 kfree(fence_state); 1555 return; 1556 } 1557 1558 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1559 struct drm_pending_vblank_event *event = crtc_state->event; 1560 /* 1561 * Free the allocated event. drm_atomic_helper_setup_commit 1562 * can allocate an event too, so only free it if it's ours 1563 * to prevent a double free in drm_atomic_commit_clear. 1564 */ 1565 if (event && (event->base.fence || event->base.file_priv)) { 1566 drm_event_cancel_free(dev, &event->base); 1567 crtc_state->event = NULL; 1568 } 1569 } 1570 1571 if (!fence_state) 1572 return; 1573 1574 for (i = 0; i < num_fences; i++) { 1575 if (fence_state[i].sync_file) 1576 fput(fence_state[i].sync_file->file); 1577 if (fence_state[i].fd >= 0) 1578 put_unused_fd(fence_state[i].fd); 1579 1580 /* If this fails log error to the user */ 1581 if (fence_state[i].out_fence_ptr && 1582 put_user(-1, fence_state[i].out_fence_ptr)) 1583 drm_dbg_atomic(dev, "Couldn't clear out_fence_ptr\n"); 1584 } 1585 1586 kfree(fence_state); 1587 } 1588 1589 static void 1590 set_async_flip(struct drm_atomic_commit *state) 1591 { 1592 struct drm_crtc *crtc; 1593 struct drm_crtc_state *crtc_state; 1594 int i; 1595 1596 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1597 crtc_state->async_flip = true; 1598 } 1599 } 1600 1601 int drm_mode_atomic_ioctl(struct drm_device *dev, 1602 void *data, struct drm_file *file_priv) 1603 { 1604 struct drm_mode_atomic *arg = data; 1605 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); 1606 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); 1607 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 1608 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); 1609 unsigned int copied_objs, copied_props; 1610 struct drm_atomic_commit *state; 1611 struct drm_modeset_acquire_ctx ctx; 1612 struct drm_out_fence_state *fence_state; 1613 int ret = 0; 1614 unsigned int i, j, num_fences; 1615 bool async_flip = false; 1616 1617 /* disallow for drivers not supporting atomic: */ 1618 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 1619 return -EOPNOTSUPP; 1620 1621 /* disallow for userspace that has not enabled atomic cap (even 1622 * though this may be a bit overkill, since legacy userspace 1623 * wouldn't know how to call this ioctl) 1624 */ 1625 if (!file_priv->atomic) { 1626 drm_dbg_atomic(dev, 1627 "commit failed: atomic cap not enabled\n"); 1628 return -EINVAL; 1629 } 1630 1631 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) { 1632 drm_dbg_atomic(dev, "commit failed: invalid flag\n"); 1633 return -EINVAL; 1634 } 1635 1636 if (arg->reserved) { 1637 drm_dbg_atomic(dev, "commit failed: reserved field set\n"); 1638 return -EINVAL; 1639 } 1640 1641 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) { 1642 if (!dev->mode_config.async_page_flip) { 1643 drm_dbg_atomic(dev, 1644 "commit failed: DRM_MODE_PAGE_FLIP_ASYNC not supported\n"); 1645 return -EINVAL; 1646 } 1647 1648 async_flip = true; 1649 } 1650 1651 /* can't test and expect an event at the same time. */ 1652 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && 1653 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { 1654 drm_dbg_atomic(dev, 1655 "commit failed: page-flip event requested with test-only commit\n"); 1656 return -EINVAL; 1657 } 1658 1659 state = drm_atomic_commit_alloc(dev); 1660 if (!state) 1661 return -ENOMEM; 1662 1663 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); 1664 state->acquire_ctx = &ctx; 1665 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); 1666 state->plane_color_pipeline = file_priv->plane_color_pipeline; 1667 1668 retry: 1669 copied_objs = 0; 1670 copied_props = 0; 1671 fence_state = NULL; 1672 num_fences = 0; 1673 1674 for (i = 0; i < arg->count_objs; i++) { 1675 uint32_t obj_id, count_props; 1676 struct drm_mode_object *obj; 1677 1678 if (get_user(obj_id, objs_ptr + copied_objs)) { 1679 ret = -EFAULT; 1680 goto out; 1681 } 1682 1683 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY); 1684 if (!obj) { 1685 drm_dbg_atomic(dev, "cannot find object ID %d", obj_id); 1686 ret = -ENOENT; 1687 goto out; 1688 } 1689 1690 if (!obj->properties) { 1691 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties", obj_id); 1692 drm_mode_object_put(obj); 1693 ret = -ENOENT; 1694 goto out; 1695 } 1696 1697 if (get_user(count_props, count_props_ptr + copied_objs)) { 1698 drm_mode_object_put(obj); 1699 ret = -EFAULT; 1700 goto out; 1701 } 1702 1703 copied_objs++; 1704 1705 for (j = 0; j < count_props; j++) { 1706 uint32_t prop_id; 1707 uint64_t prop_value; 1708 struct drm_property *prop; 1709 1710 if (get_user(prop_id, props_ptr + copied_props)) { 1711 drm_mode_object_put(obj); 1712 ret = -EFAULT; 1713 goto out; 1714 } 1715 1716 prop = drm_mode_obj_find_prop_id(obj, prop_id); 1717 if (!prop) { 1718 drm_dbg_atomic(dev, 1719 "[OBJECT:%d] cannot find property ID %d", 1720 obj_id, prop_id); 1721 drm_mode_object_put(obj); 1722 ret = -ENOENT; 1723 goto out; 1724 } 1725 1726 if (copy_from_user(&prop_value, 1727 prop_values_ptr + copied_props, 1728 sizeof(prop_value))) { 1729 drm_mode_object_put(obj); 1730 ret = -EFAULT; 1731 goto out; 1732 } 1733 1734 ret = drm_atomic_set_property(state, file_priv, obj, 1735 prop, prop_value, async_flip); 1736 if (ret) { 1737 drm_mode_object_put(obj); 1738 goto out; 1739 } 1740 1741 copied_props++; 1742 } 1743 1744 drm_mode_object_put(obj); 1745 } 1746 1747 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, 1748 &num_fences); 1749 if (ret) 1750 goto out; 1751 1752 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) 1753 set_async_flip(state); 1754 1755 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { 1756 ret = drm_atomic_check_only(state); 1757 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { 1758 ret = drm_atomic_nonblocking_commit(state); 1759 } else { 1760 ret = drm_atomic_commit(state); 1761 } 1762 1763 out: 1764 complete_signaling(dev, state, fence_state, num_fences, !ret); 1765 1766 if (ret == -EDEADLK) { 1767 drm_atomic_commit_clear(state); 1768 ret = drm_modeset_backoff(&ctx); 1769 if (!ret) 1770 goto retry; 1771 } 1772 1773 drm_atomic_commit_put(state); 1774 1775 drm_modeset_drop_locks(&ctx); 1776 drm_modeset_acquire_fini(&ctx); 1777 1778 return ret; 1779 } 1780