1 /* 2 * Copyright (C) 2014 Red Hat 3 * Copyright (C) 2014 Intel Corp. 4 * Copyright (C) 2018 Intel Corp. 5 * Copyright (c) 2020, The Linux Foundation. All rights reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 * OTHER DEALINGS IN THE SOFTWARE. 24 * 25 * Authors: 26 * Rob Clark <robdclark@gmail.com> 27 * Daniel Vetter <daniel.vetter@ffwll.ch> 28 */ 29 30 #include <drm/drm_atomic_uapi.h> 31 #include <drm/drm_atomic.h> 32 #include <drm/drm_framebuffer.h> 33 #include <drm/drm_print.h> 34 #include <drm/drm_drv.h> 35 #include <drm/drm_writeback.h> 36 #include <drm/drm_vblank.h> 37 38 #include <linux/dma-fence.h> 39 #include <linux/uaccess.h> 40 #include <linux/sync_file.h> 41 #include <linux/file.h> 42 43 #include "drm_crtc_internal.h" 44 45 /** 46 * DOC: overview 47 * 48 * This file contains the marshalling and demarshalling glue for the atomic UAPI 49 * in all its forms: The monster ATOMIC IOCTL itself, code for GET_PROPERTY and 50 * SET_PROPERTY IOCTLs. Plus interface functions for compatibility helpers and 51 * drivers which have special needs to construct their own atomic updates, e.g. 52 * for load detect or similar. 53 */ 54 55 /** 56 * drm_atomic_set_mode_for_crtc - set mode for CRTC 57 * @state: the CRTC whose incoming state to update 58 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable 59 * 60 * Set a mode (originating from the kernel) on the desired CRTC state and update 61 * the enable property. 62 * 63 * RETURNS: 64 * Zero on success, error code on failure. Cannot return -EDEADLK. 65 */ 66 int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state, 67 const struct drm_display_mode *mode) 68 { 69 struct drm_crtc *crtc = state->crtc; 70 struct drm_mode_modeinfo umode; 71 72 /* Early return for no change. */ 73 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0) 74 return 0; 75 76 drm_property_blob_put(state->mode_blob); 77 state->mode_blob = NULL; 78 79 if (mode) { 80 struct drm_property_blob *blob; 81 82 drm_mode_convert_to_umode(&umode, mode); 83 blob = drm_property_create_blob(crtc->dev, 84 sizeof(umode), &umode); 85 if (IS_ERR(blob)) 86 return PTR_ERR(blob); 87 88 drm_mode_copy(&state->mode, mode); 89 90 state->mode_blob = blob; 91 state->enable = true; 92 drm_dbg_atomic(crtc->dev, 93 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 94 mode->name, crtc->base.id, crtc->name, state); 95 } else { 96 memset(&state->mode, 0, sizeof(state->mode)); 97 state->enable = false; 98 drm_dbg_atomic(crtc->dev, 99 "Set [NOMODE] for [CRTC:%d:%s] state %p\n", 100 crtc->base.id, crtc->name, state); 101 } 102 103 return 0; 104 } 105 EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc); 106 107 /** 108 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC 109 * @state: the CRTC whose incoming state to update 110 * @blob: pointer to blob property to use for mode 111 * 112 * Set a mode (originating from a blob property) on the desired CRTC state. 113 * This function will take a reference on the blob property for the CRTC state, 114 * and release the reference held on the state's existing mode property, if any 115 * was set. 116 * 117 * RETURNS: 118 * Zero on success, error code on failure. Cannot return -EDEADLK. 119 */ 120 int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, 121 struct drm_property_blob *blob) 122 { 123 struct drm_crtc *crtc = state->crtc; 124 125 if (blob == state->mode_blob) 126 return 0; 127 128 drm_property_blob_put(state->mode_blob); 129 state->mode_blob = NULL; 130 131 memset(&state->mode, 0, sizeof(state->mode)); 132 133 if (blob) { 134 int ret; 135 136 if (blob->length != sizeof(struct drm_mode_modeinfo)) { 137 drm_dbg_atomic(crtc->dev, 138 "[CRTC:%d:%s] bad mode blob length: %zu\n", 139 crtc->base.id, crtc->name, 140 blob->length); 141 return -EINVAL; 142 } 143 144 ret = drm_mode_convert_umode(crtc->dev, 145 &state->mode, blob->data); 146 if (ret) { 147 drm_dbg_atomic(crtc->dev, 148 "[CRTC:%d:%s] invalid mode (%s, %pe): " DRM_MODE_FMT "\n", 149 crtc->base.id, crtc->name, 150 drm_get_mode_status_name(state->mode.status), 151 ERR_PTR(ret), DRM_MODE_ARG(&state->mode)); 152 return -EINVAL; 153 } 154 155 state->mode_blob = drm_property_blob_get(blob); 156 state->enable = true; 157 drm_dbg_atomic(crtc->dev, 158 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n", 159 state->mode.name, crtc->base.id, crtc->name, 160 state); 161 } else { 162 state->enable = false; 163 drm_dbg_atomic(crtc->dev, 164 "Set [NOMODE] for [CRTC:%d:%s] state %p\n", 165 crtc->base.id, crtc->name, state); 166 } 167 168 return 0; 169 } 170 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); 171 172 /** 173 * drm_atomic_set_crtc_for_plane - set CRTC for plane 174 * @plane_state: the plane whose incoming state to update 175 * @crtc: CRTC to use for the plane 176 * 177 * Changing the assigned CRTC for a plane requires us to grab the lock and state 178 * for the new CRTC, as needed. This function takes care of all these details 179 * besides updating the pointer in the state object itself. 180 * 181 * Returns: 182 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 183 * then the w/w mutex code has detected a deadlock and the entire atomic 184 * sequence must be restarted. All other errors are fatal. 185 */ 186 int 187 drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, 188 struct drm_crtc *crtc) 189 { 190 struct drm_plane *plane = plane_state->plane; 191 struct drm_crtc_state *crtc_state; 192 /* Nothing to do for same crtc*/ 193 if (plane_state->crtc == crtc) 194 return 0; 195 if (plane_state->crtc) { 196 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 197 plane_state->crtc); 198 if (WARN_ON(IS_ERR(crtc_state))) 199 return PTR_ERR(crtc_state); 200 201 crtc_state->plane_mask &= ~drm_plane_mask(plane); 202 } 203 204 plane_state->crtc = crtc; 205 206 if (crtc) { 207 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 208 crtc); 209 if (IS_ERR(crtc_state)) 210 return PTR_ERR(crtc_state); 211 crtc_state->plane_mask |= drm_plane_mask(plane); 212 } 213 214 if (crtc) 215 drm_dbg_atomic(plane->dev, 216 "Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n", 217 plane->base.id, plane->name, plane_state, 218 crtc->base.id, crtc->name); 219 else 220 drm_dbg_atomic(plane->dev, 221 "Link [PLANE:%d:%s] state %p to [NOCRTC]\n", 222 plane->base.id, plane->name, plane_state); 223 224 return 0; 225 } 226 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane); 227 228 /** 229 * drm_atomic_set_fb_for_plane - set framebuffer for plane 230 * @plane_state: atomic state object for the plane 231 * @fb: fb to use for the plane 232 * 233 * Changing the assigned framebuffer for a plane requires us to grab a reference 234 * to the new fb and drop the reference to the old fb, if there is one. This 235 * function takes care of all these details besides updating the pointer in the 236 * state object itself. 237 */ 238 void 239 drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, 240 struct drm_framebuffer *fb) 241 { 242 struct drm_plane *plane = plane_state->plane; 243 244 if (fb) 245 drm_dbg_atomic(plane->dev, 246 "Set [FB:%d] for [PLANE:%d:%s] state %p\n", 247 fb->base.id, plane->base.id, plane->name, 248 plane_state); 249 else 250 drm_dbg_atomic(plane->dev, 251 "Set [NOFB] for [PLANE:%d:%s] state %p\n", 252 plane->base.id, plane->name, plane_state); 253 254 drm_framebuffer_assign(&plane_state->fb, fb); 255 } 256 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); 257 258 /** 259 * drm_atomic_set_crtc_for_connector - set CRTC for connector 260 * @conn_state: atomic state object for the connector 261 * @crtc: CRTC to use for the connector 262 * 263 * Changing the assigned CRTC for a connector requires us to grab the lock and 264 * state for the new CRTC, as needed. This function takes care of all these 265 * details besides updating the pointer in the state object itself. 266 * 267 * Returns: 268 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 269 * then the w/w mutex code has detected a deadlock and the entire atomic 270 * sequence must be restarted. All other errors are fatal. 271 */ 272 int 273 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, 274 struct drm_crtc *crtc) 275 { 276 struct drm_connector *connector = conn_state->connector; 277 struct drm_crtc_state *crtc_state; 278 279 if (conn_state->crtc == crtc) 280 return 0; 281 282 if (conn_state->crtc) { 283 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state, 284 conn_state->crtc); 285 286 crtc_state->connector_mask &= 287 ~drm_connector_mask(conn_state->connector); 288 289 drm_connector_put(conn_state->connector); 290 conn_state->crtc = NULL; 291 } 292 293 if (crtc) { 294 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); 295 if (IS_ERR(crtc_state)) 296 return PTR_ERR(crtc_state); 297 298 crtc_state->connector_mask |= 299 drm_connector_mask(conn_state->connector); 300 301 drm_connector_get(conn_state->connector); 302 conn_state->crtc = crtc; 303 304 drm_dbg_atomic(connector->dev, 305 "Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n", 306 connector->base.id, connector->name, 307 conn_state, crtc->base.id, crtc->name); 308 } else { 309 drm_dbg_atomic(connector->dev, 310 "Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n", 311 connector->base.id, connector->name, 312 conn_state); 313 } 314 315 return 0; 316 } 317 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); 318 319 static void set_out_fence_for_crtc(struct drm_atomic_state *state, 320 struct drm_crtc *crtc, s32 __user *fence_ptr) 321 { 322 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; 323 } 324 325 static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state, 326 struct drm_crtc *crtc) 327 { 328 s32 __user *fence_ptr; 329 330 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; 331 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; 332 333 return fence_ptr; 334 } 335 336 static int set_out_fence_for_connector(struct drm_atomic_state *state, 337 struct drm_connector *connector, 338 s32 __user *fence_ptr) 339 { 340 unsigned int index = drm_connector_index(connector); 341 342 if (!fence_ptr) 343 return 0; 344 345 if (put_user(-1, fence_ptr)) 346 return -EFAULT; 347 348 state->connectors[index].out_fence_ptr = fence_ptr; 349 350 return 0; 351 } 352 353 static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state, 354 struct drm_connector *connector) 355 { 356 unsigned int index = drm_connector_index(connector); 357 s32 __user *fence_ptr; 358 359 fence_ptr = state->connectors[index].out_fence_ptr; 360 state->connectors[index].out_fence_ptr = NULL; 361 362 return fence_ptr; 363 } 364 365 static int drm_atomic_crtc_set_property(struct drm_crtc *crtc, 366 struct drm_crtc_state *state, struct drm_property *property, 367 uint64_t val) 368 { 369 struct drm_device *dev = crtc->dev; 370 struct drm_mode_config *config = &dev->mode_config; 371 bool replaced = false; 372 int ret; 373 374 if (property == config->prop_active) 375 state->active = val; 376 else if (property == config->prop_mode_id) { 377 struct drm_property_blob *mode = 378 drm_property_lookup_blob(dev, val); 379 ret = drm_atomic_set_mode_prop_for_crtc(state, mode); 380 drm_property_blob_put(mode); 381 return ret; 382 } else if (property == config->prop_vrr_enabled) { 383 state->vrr_enabled = val; 384 } else if (property == config->degamma_lut_property) { 385 ret = drm_property_replace_blob_from_id(dev, 386 &state->degamma_lut, 387 val, 388 -1, sizeof(struct drm_color_lut), 389 &replaced); 390 state->color_mgmt_changed |= replaced; 391 return ret; 392 } else if (property == config->ctm_property) { 393 ret = drm_property_replace_blob_from_id(dev, 394 &state->ctm, 395 val, 396 sizeof(struct drm_color_ctm), -1, 397 &replaced); 398 state->color_mgmt_changed |= replaced; 399 return ret; 400 } else if (property == config->gamma_lut_property) { 401 ret = drm_property_replace_blob_from_id(dev, 402 &state->gamma_lut, 403 val, 404 -1, sizeof(struct drm_color_lut), 405 &replaced); 406 state->color_mgmt_changed |= replaced; 407 return ret; 408 } else if (property == config->prop_out_fence_ptr) { 409 s32 __user *fence_ptr = u64_to_user_ptr(val); 410 411 if (!fence_ptr) 412 return 0; 413 414 if (put_user(-1, fence_ptr)) 415 return -EFAULT; 416 417 set_out_fence_for_crtc(state->state, crtc, fence_ptr); 418 } else if (property == crtc->scaling_filter_property) { 419 state->scaling_filter = val; 420 } else if (crtc->funcs->atomic_set_property) { 421 return crtc->funcs->atomic_set_property(crtc, state, property, val); 422 } else { 423 drm_dbg_atomic(crtc->dev, 424 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n", 425 crtc->base.id, crtc->name, 426 property->base.id, property->name); 427 return -EINVAL; 428 } 429 430 return 0; 431 } 432 433 static int 434 drm_atomic_crtc_get_property(struct drm_crtc *crtc, 435 const struct drm_crtc_state *state, 436 struct drm_property *property, uint64_t *val) 437 { 438 struct drm_device *dev = crtc->dev; 439 struct drm_mode_config *config = &dev->mode_config; 440 441 if (property == config->prop_active) 442 *val = drm_atomic_crtc_effectively_active(state); 443 else if (property == config->prop_mode_id) 444 *val = (state->mode_blob) ? state->mode_blob->base.id : 0; 445 else if (property == config->prop_vrr_enabled) 446 *val = state->vrr_enabled; 447 else if (property == config->degamma_lut_property) 448 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; 449 else if (property == config->ctm_property) 450 *val = (state->ctm) ? state->ctm->base.id : 0; 451 else if (property == config->gamma_lut_property) 452 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; 453 else if (property == config->prop_out_fence_ptr) 454 *val = 0; 455 else if (property == crtc->scaling_filter_property) 456 *val = state->scaling_filter; 457 else if (crtc->funcs->atomic_get_property) 458 return crtc->funcs->atomic_get_property(crtc, state, property, val); 459 else { 460 drm_dbg_atomic(dev, 461 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n", 462 crtc->base.id, crtc->name, 463 property->base.id, property->name); 464 return -EINVAL; 465 } 466 467 return 0; 468 } 469 470 static int drm_atomic_plane_set_property(struct drm_plane *plane, 471 struct drm_plane_state *state, struct drm_file *file_priv, 472 struct drm_property *property, uint64_t val) 473 { 474 struct drm_device *dev = plane->dev; 475 struct drm_mode_config *config = &dev->mode_config; 476 bool replaced = false; 477 int ret; 478 479 if (property == config->prop_fb_id) { 480 struct drm_framebuffer *fb; 481 482 fb = drm_framebuffer_lookup(dev, file_priv, val); 483 drm_atomic_set_fb_for_plane(state, fb); 484 if (fb) 485 drm_framebuffer_put(fb); 486 } else if (property == config->prop_in_fence_fd) { 487 if (state->fence) 488 return -EINVAL; 489 490 if (U642I64(val) == -1) 491 return 0; 492 493 state->fence = sync_file_get_fence(val); 494 if (!state->fence) 495 return -EINVAL; 496 497 } else if (property == config->prop_crtc_id) { 498 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 499 500 if (val && !crtc) { 501 drm_dbg_atomic(dev, 502 "[PROP:%d:%s] cannot find CRTC with ID %llu\n", 503 property->base.id, property->name, val); 504 return -EACCES; 505 } 506 return drm_atomic_set_crtc_for_plane(state, crtc); 507 } else if (property == config->prop_crtc_x) { 508 state->crtc_x = U642I64(val); 509 } else if (property == config->prop_crtc_y) { 510 state->crtc_y = U642I64(val); 511 } else if (property == config->prop_crtc_w) { 512 state->crtc_w = val; 513 } else if (property == config->prop_crtc_h) { 514 state->crtc_h = val; 515 } else if (property == config->prop_src_x) { 516 state->src_x = val; 517 } else if (property == config->prop_src_y) { 518 state->src_y = val; 519 } else if (property == config->prop_src_w) { 520 state->src_w = val; 521 } else if (property == config->prop_src_h) { 522 state->src_h = val; 523 } else if (property == plane->alpha_property) { 524 state->alpha = val; 525 } else if (property == plane->blend_mode_property) { 526 state->pixel_blend_mode = val; 527 } else if (property == plane->rotation_property) { 528 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) { 529 drm_dbg_atomic(plane->dev, 530 "[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n", 531 plane->base.id, plane->name, val); 532 return -EINVAL; 533 } 534 state->rotation = val; 535 } else if (property == plane->zpos_property) { 536 state->zpos = val; 537 } else if (property == plane->color_encoding_property) { 538 state->color_encoding = val; 539 } else if (property == plane->color_range_property) { 540 state->color_range = val; 541 } else if (property == config->prop_fb_damage_clips) { 542 ret = drm_property_replace_blob_from_id(dev, 543 &state->fb_damage_clips, 544 val, 545 -1, 546 sizeof(struct drm_rect), 547 &replaced); 548 return ret; 549 } else if (property == plane->scaling_filter_property) { 550 state->scaling_filter = val; 551 } else if (plane->funcs->atomic_set_property) { 552 return plane->funcs->atomic_set_property(plane, state, 553 property, val); 554 } else if (property == plane->hotspot_x_property) { 555 if (plane->type != DRM_PLANE_TYPE_CURSOR) { 556 drm_dbg_atomic(plane->dev, 557 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n", 558 plane->base.id, plane->name, val); 559 return -EINVAL; 560 } 561 state->hotspot_x = val; 562 } else if (property == plane->hotspot_y_property) { 563 if (plane->type != DRM_PLANE_TYPE_CURSOR) { 564 drm_dbg_atomic(plane->dev, 565 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n", 566 plane->base.id, plane->name, val); 567 return -EINVAL; 568 } 569 state->hotspot_y = val; 570 } else { 571 drm_dbg_atomic(plane->dev, 572 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n", 573 plane->base.id, plane->name, 574 property->base.id, property->name); 575 return -EINVAL; 576 } 577 578 return 0; 579 } 580 581 static int 582 drm_atomic_plane_get_property(struct drm_plane *plane, 583 const struct drm_plane_state *state, 584 struct drm_property *property, uint64_t *val) 585 { 586 struct drm_device *dev = plane->dev; 587 struct drm_mode_config *config = &dev->mode_config; 588 589 if (property == config->prop_fb_id) { 590 *val = (state->fb) ? state->fb->base.id : 0; 591 } else if (property == config->prop_in_fence_fd) { 592 *val = -1; 593 } else if (property == config->prop_crtc_id) { 594 *val = (state->crtc) ? state->crtc->base.id : 0; 595 } else if (property == config->prop_crtc_x) { 596 *val = I642U64(state->crtc_x); 597 } else if (property == config->prop_crtc_y) { 598 *val = I642U64(state->crtc_y); 599 } else if (property == config->prop_crtc_w) { 600 *val = state->crtc_w; 601 } else if (property == config->prop_crtc_h) { 602 *val = state->crtc_h; 603 } else if (property == config->prop_src_x) { 604 *val = state->src_x; 605 } else if (property == config->prop_src_y) { 606 *val = state->src_y; 607 } else if (property == config->prop_src_w) { 608 *val = state->src_w; 609 } else if (property == config->prop_src_h) { 610 *val = state->src_h; 611 } else if (property == plane->alpha_property) { 612 *val = state->alpha; 613 } else if (property == plane->blend_mode_property) { 614 *val = state->pixel_blend_mode; 615 } else if (property == plane->rotation_property) { 616 *val = state->rotation; 617 } else if (property == plane->zpos_property) { 618 *val = state->zpos; 619 } else if (property == plane->color_encoding_property) { 620 *val = state->color_encoding; 621 } else if (property == plane->color_range_property) { 622 *val = state->color_range; 623 } else if (property == config->prop_fb_damage_clips) { 624 *val = (state->fb_damage_clips) ? 625 state->fb_damage_clips->base.id : 0; 626 } else if (property == plane->scaling_filter_property) { 627 *val = state->scaling_filter; 628 } else if (plane->funcs->atomic_get_property) { 629 return plane->funcs->atomic_get_property(plane, state, property, val); 630 } else if (property == plane->hotspot_x_property) { 631 *val = state->hotspot_x; 632 } else if (property == plane->hotspot_y_property) { 633 *val = state->hotspot_y; 634 } else { 635 drm_dbg_atomic(dev, 636 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n", 637 plane->base.id, plane->name, 638 property->base.id, property->name); 639 return -EINVAL; 640 } 641 642 return 0; 643 } 644 645 static int drm_atomic_set_writeback_fb_for_connector( 646 struct drm_connector_state *conn_state, 647 struct drm_framebuffer *fb) 648 { 649 int ret; 650 struct drm_connector *conn = conn_state->connector; 651 652 ret = drm_writeback_set_fb(conn_state, fb); 653 if (ret < 0) 654 return ret; 655 656 if (fb) 657 drm_dbg_atomic(conn->dev, 658 "Set [FB:%d] for connector state %p\n", 659 fb->base.id, conn_state); 660 else 661 drm_dbg_atomic(conn->dev, 662 "Set [NOFB] for connector state %p\n", 663 conn_state); 664 665 return 0; 666 } 667 668 static int drm_atomic_connector_set_property(struct drm_connector *connector, 669 struct drm_connector_state *state, struct drm_file *file_priv, 670 struct drm_property *property, uint64_t val) 671 { 672 struct drm_device *dev = connector->dev; 673 struct drm_mode_config *config = &dev->mode_config; 674 bool replaced = false; 675 int ret; 676 677 if (property == config->prop_crtc_id) { 678 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 679 680 if (val && !crtc) { 681 drm_dbg_atomic(dev, 682 "[PROP:%d:%s] cannot find CRTC with ID %llu\n", 683 property->base.id, property->name, val); 684 return -EACCES; 685 } 686 return drm_atomic_set_crtc_for_connector(state, crtc); 687 } else if (property == config->dpms_property) { 688 /* setting DPMS property requires special handling, which 689 * is done in legacy setprop path for us. Disallow (for 690 * now?) atomic writes to DPMS property: 691 */ 692 drm_dbg_atomic(dev, 693 "legacy [PROP:%d:%s] can only be set via legacy uAPI\n", 694 property->base.id, property->name); 695 return -EINVAL; 696 } else if (property == config->tv_select_subconnector_property) { 697 state->tv.select_subconnector = val; 698 } else if (property == config->tv_subconnector_property) { 699 state->tv.subconnector = val; 700 } else if (property == config->tv_left_margin_property) { 701 state->tv.margins.left = val; 702 } else if (property == config->tv_right_margin_property) { 703 state->tv.margins.right = val; 704 } else if (property == config->tv_top_margin_property) { 705 state->tv.margins.top = val; 706 } else if (property == config->tv_bottom_margin_property) { 707 state->tv.margins.bottom = val; 708 } else if (property == config->legacy_tv_mode_property) { 709 state->tv.legacy_mode = val; 710 } else if (property == config->tv_mode_property) { 711 state->tv.mode = val; 712 } else if (property == config->tv_brightness_property) { 713 state->tv.brightness = val; 714 } else if (property == config->tv_contrast_property) { 715 state->tv.contrast = val; 716 } else if (property == config->tv_flicker_reduction_property) { 717 state->tv.flicker_reduction = val; 718 } else if (property == config->tv_overscan_property) { 719 state->tv.overscan = val; 720 } else if (property == config->tv_saturation_property) { 721 state->tv.saturation = val; 722 } else if (property == config->tv_hue_property) { 723 state->tv.hue = val; 724 } else if (property == config->link_status_property) { 725 /* Never downgrade from GOOD to BAD on userspace's request here, 726 * only hw issues can do that. 727 * 728 * For an atomic property the userspace doesn't need to be able 729 * to understand all the properties, but needs to be able to 730 * restore the state it wants on VT switch. So if the userspace 731 * tries to change the link_status from GOOD to BAD, driver 732 * silently rejects it and returns a 0. This prevents userspace 733 * from accidentally breaking the display when it restores the 734 * state. 735 */ 736 if (state->link_status != DRM_LINK_STATUS_GOOD) 737 state->link_status = val; 738 } else if (property == config->hdr_output_metadata_property) { 739 ret = drm_property_replace_blob_from_id(dev, 740 &state->hdr_output_metadata, 741 val, 742 sizeof(struct hdr_output_metadata), -1, 743 &replaced); 744 return ret; 745 } else if (property == config->aspect_ratio_property) { 746 state->picture_aspect_ratio = val; 747 } else if (property == config->content_type_property) { 748 state->content_type = val; 749 } else if (property == connector->scaling_mode_property) { 750 state->scaling_mode = val; 751 } else if (property == config->content_protection_property) { 752 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) { 753 drm_dbg_kms(dev, "only drivers can set CP Enabled\n"); 754 return -EINVAL; 755 } 756 state->content_protection = val; 757 } else if (property == config->hdcp_content_type_property) { 758 state->hdcp_content_type = val; 759 } else if (property == connector->colorspace_property) { 760 state->colorspace = val; 761 } else if (property == config->writeback_fb_id_property) { 762 struct drm_framebuffer *fb; 763 int ret; 764 765 fb = drm_framebuffer_lookup(dev, file_priv, val); 766 ret = drm_atomic_set_writeback_fb_for_connector(state, fb); 767 if (fb) 768 drm_framebuffer_put(fb); 769 return ret; 770 } else if (property == config->writeback_out_fence_ptr_property) { 771 s32 __user *fence_ptr = u64_to_user_ptr(val); 772 773 return set_out_fence_for_connector(state->state, connector, 774 fence_ptr); 775 } else if (property == connector->max_bpc_property) { 776 state->max_requested_bpc = val; 777 } else if (property == connector->privacy_screen_sw_state_property) { 778 state->privacy_screen_sw_state = val; 779 } else if (property == connector->broadcast_rgb_property) { 780 state->hdmi.broadcast_rgb = val; 781 } else if (connector->funcs->atomic_set_property) { 782 return connector->funcs->atomic_set_property(connector, 783 state, property, val); 784 } else { 785 drm_dbg_atomic(connector->dev, 786 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n", 787 connector->base.id, connector->name, 788 property->base.id, property->name); 789 return -EINVAL; 790 } 791 792 return 0; 793 } 794 795 static int 796 drm_atomic_connector_get_property(struct drm_connector *connector, 797 const struct drm_connector_state *state, 798 struct drm_property *property, uint64_t *val) 799 { 800 struct drm_device *dev = connector->dev; 801 struct drm_mode_config *config = &dev->mode_config; 802 803 if (property == config->prop_crtc_id) { 804 *val = (state->crtc) ? state->crtc->base.id : 0; 805 } else if (property == config->dpms_property) { 806 if (state->crtc && state->crtc->state->self_refresh_active) 807 *val = DRM_MODE_DPMS_ON; 808 else 809 *val = connector->dpms; 810 } else if (property == config->tv_select_subconnector_property) { 811 *val = state->tv.select_subconnector; 812 } else if (property == config->tv_subconnector_property) { 813 *val = state->tv.subconnector; 814 } else if (property == config->tv_left_margin_property) { 815 *val = state->tv.margins.left; 816 } else if (property == config->tv_right_margin_property) { 817 *val = state->tv.margins.right; 818 } else if (property == config->tv_top_margin_property) { 819 *val = state->tv.margins.top; 820 } else if (property == config->tv_bottom_margin_property) { 821 *val = state->tv.margins.bottom; 822 } else if (property == config->legacy_tv_mode_property) { 823 *val = state->tv.legacy_mode; 824 } else if (property == config->tv_mode_property) { 825 *val = state->tv.mode; 826 } else if (property == config->tv_brightness_property) { 827 *val = state->tv.brightness; 828 } else if (property == config->tv_contrast_property) { 829 *val = state->tv.contrast; 830 } else if (property == config->tv_flicker_reduction_property) { 831 *val = state->tv.flicker_reduction; 832 } else if (property == config->tv_overscan_property) { 833 *val = state->tv.overscan; 834 } else if (property == config->tv_saturation_property) { 835 *val = state->tv.saturation; 836 } else if (property == config->tv_hue_property) { 837 *val = state->tv.hue; 838 } else if (property == config->link_status_property) { 839 *val = state->link_status; 840 } else if (property == config->aspect_ratio_property) { 841 *val = state->picture_aspect_ratio; 842 } else if (property == config->content_type_property) { 843 *val = state->content_type; 844 } else if (property == connector->colorspace_property) { 845 *val = state->colorspace; 846 } else if (property == connector->scaling_mode_property) { 847 *val = state->scaling_mode; 848 } else if (property == config->hdr_output_metadata_property) { 849 *val = state->hdr_output_metadata ? 850 state->hdr_output_metadata->base.id : 0; 851 } else if (property == config->content_protection_property) { 852 *val = state->content_protection; 853 } else if (property == config->hdcp_content_type_property) { 854 *val = state->hdcp_content_type; 855 } else if (property == config->writeback_fb_id_property) { 856 /* Writeback framebuffer is one-shot, write and forget */ 857 *val = 0; 858 } else if (property == config->writeback_out_fence_ptr_property) { 859 *val = 0; 860 } else if (property == connector->max_bpc_property) { 861 *val = state->max_requested_bpc; 862 } else if (property == connector->privacy_screen_sw_state_property) { 863 *val = state->privacy_screen_sw_state; 864 } else if (property == connector->broadcast_rgb_property) { 865 *val = state->hdmi.broadcast_rgb; 866 } else if (connector->funcs->atomic_get_property) { 867 return connector->funcs->atomic_get_property(connector, 868 state, property, val); 869 } else { 870 drm_dbg_atomic(dev, 871 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n", 872 connector->base.id, connector->name, 873 property->base.id, property->name); 874 return -EINVAL; 875 } 876 877 return 0; 878 } 879 880 int drm_atomic_get_property(struct drm_mode_object *obj, 881 struct drm_property *property, uint64_t *val) 882 { 883 struct drm_device *dev = property->dev; 884 int ret; 885 886 switch (obj->type) { 887 case DRM_MODE_OBJECT_CONNECTOR: { 888 struct drm_connector *connector = obj_to_connector(obj); 889 890 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 891 ret = drm_atomic_connector_get_property(connector, 892 connector->state, property, val); 893 break; 894 } 895 case DRM_MODE_OBJECT_CRTC: { 896 struct drm_crtc *crtc = obj_to_crtc(obj); 897 898 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 899 ret = drm_atomic_crtc_get_property(crtc, 900 crtc->state, property, val); 901 break; 902 } 903 case DRM_MODE_OBJECT_PLANE: { 904 struct drm_plane *plane = obj_to_plane(obj); 905 906 WARN_ON(!drm_modeset_is_locked(&plane->mutex)); 907 ret = drm_atomic_plane_get_property(plane, 908 plane->state, property, val); 909 break; 910 } 911 default: 912 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties\n", obj->id); 913 ret = -EINVAL; 914 break; 915 } 916 917 return ret; 918 } 919 920 /* 921 * The big monster ioctl 922 */ 923 924 static struct drm_pending_vblank_event *create_vblank_event( 925 struct drm_crtc *crtc, uint64_t user_data) 926 { 927 struct drm_pending_vblank_event *e = NULL; 928 929 e = kzalloc(sizeof *e, GFP_KERNEL); 930 if (!e) 931 return NULL; 932 933 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 934 e->event.base.length = sizeof(e->event); 935 e->event.vbl.crtc_id = crtc->base.id; 936 e->event.vbl.user_data = user_data; 937 938 return e; 939 } 940 941 int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state, 942 struct drm_connector *connector, 943 int mode) 944 { 945 struct drm_connector *tmp_connector; 946 struct drm_connector_state *new_conn_state; 947 struct drm_crtc *crtc; 948 struct drm_crtc_state *crtc_state; 949 int i, ret, old_mode = connector->dpms; 950 bool active = false; 951 952 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, 953 state->acquire_ctx); 954 if (ret) 955 return ret; 956 957 if (mode != DRM_MODE_DPMS_ON) 958 mode = DRM_MODE_DPMS_OFF; 959 connector->dpms = mode; 960 961 crtc = connector->state->crtc; 962 if (!crtc) 963 goto out; 964 ret = drm_atomic_add_affected_connectors(state, crtc); 965 if (ret) 966 goto out; 967 968 crtc_state = drm_atomic_get_crtc_state(state, crtc); 969 if (IS_ERR(crtc_state)) { 970 ret = PTR_ERR(crtc_state); 971 goto out; 972 } 973 974 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) { 975 if (new_conn_state->crtc != crtc) 976 continue; 977 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { 978 active = true; 979 break; 980 } 981 } 982 983 crtc_state->active = active; 984 ret = drm_atomic_commit(state); 985 out: 986 if (ret != 0) 987 connector->dpms = old_mode; 988 return ret; 989 } 990 991 static int drm_atomic_check_prop_changes(int ret, uint64_t old_val, uint64_t prop_value, 992 struct drm_property *prop) 993 { 994 if (ret != 0 || old_val != prop_value) { 995 drm_dbg_atomic(prop->dev, 996 "[PROP:%d:%s] No prop can be changed during async flip\n", 997 prop->base.id, prop->name); 998 return -EINVAL; 999 } 1000 1001 return 0; 1002 } 1003 1004 int drm_atomic_set_property(struct drm_atomic_state *state, 1005 struct drm_file *file_priv, 1006 struct drm_mode_object *obj, 1007 struct drm_property *prop, 1008 u64 prop_value, 1009 bool async_flip) 1010 { 1011 struct drm_mode_object *ref; 1012 u64 old_val; 1013 int ret; 1014 1015 if (!drm_property_change_valid_get(prop, prop_value, &ref)) 1016 return -EINVAL; 1017 1018 switch (obj->type) { 1019 case DRM_MODE_OBJECT_CONNECTOR: { 1020 struct drm_connector *connector = obj_to_connector(obj); 1021 struct drm_connector_state *connector_state; 1022 1023 connector_state = drm_atomic_get_connector_state(state, connector); 1024 if (IS_ERR(connector_state)) { 1025 ret = PTR_ERR(connector_state); 1026 break; 1027 } 1028 1029 if (async_flip) { 1030 ret = drm_atomic_connector_get_property(connector, connector_state, 1031 prop, &old_val); 1032 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 1033 break; 1034 } 1035 1036 ret = drm_atomic_connector_set_property(connector, 1037 connector_state, file_priv, 1038 prop, prop_value); 1039 break; 1040 } 1041 case DRM_MODE_OBJECT_CRTC: { 1042 struct drm_crtc *crtc = obj_to_crtc(obj); 1043 struct drm_crtc_state *crtc_state; 1044 1045 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1046 if (IS_ERR(crtc_state)) { 1047 ret = PTR_ERR(crtc_state); 1048 break; 1049 } 1050 1051 if (async_flip) { 1052 ret = drm_atomic_crtc_get_property(crtc, crtc_state, 1053 prop, &old_val); 1054 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 1055 break; 1056 } 1057 1058 ret = drm_atomic_crtc_set_property(crtc, 1059 crtc_state, prop, prop_value); 1060 break; 1061 } 1062 case DRM_MODE_OBJECT_PLANE: { 1063 struct drm_plane *plane = obj_to_plane(obj); 1064 struct drm_plane_state *plane_state; 1065 struct drm_mode_config *config = &plane->dev->mode_config; 1066 1067 plane_state = drm_atomic_get_plane_state(state, plane); 1068 if (IS_ERR(plane_state)) { 1069 ret = PTR_ERR(plane_state); 1070 break; 1071 } 1072 1073 if (async_flip && prop != config->prop_fb_id) { 1074 ret = drm_atomic_plane_get_property(plane, plane_state, 1075 prop, &old_val); 1076 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 1077 break; 1078 } 1079 1080 if (async_flip && plane_state->plane->type != DRM_PLANE_TYPE_PRIMARY) { 1081 drm_dbg_atomic(prop->dev, 1082 "[OBJECT:%d] Only primary planes can be changed during async flip\n", 1083 obj->id); 1084 ret = -EINVAL; 1085 break; 1086 } 1087 1088 ret = drm_atomic_plane_set_property(plane, 1089 plane_state, file_priv, 1090 prop, prop_value); 1091 break; 1092 } 1093 default: 1094 drm_dbg_atomic(prop->dev, "[OBJECT:%d] has no properties\n", obj->id); 1095 ret = -EINVAL; 1096 break; 1097 } 1098 1099 drm_property_change_valid_put(prop, ref); 1100 return ret; 1101 } 1102 1103 /** 1104 * DOC: explicit fencing properties 1105 * 1106 * Explicit fencing allows userspace to control the buffer synchronization 1107 * between devices. A Fence or a group of fences are transferred to/from 1108 * userspace using Sync File fds and there are two DRM properties for that. 1109 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and 1110 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. 1111 * 1112 * As a contrast, with implicit fencing the kernel keeps track of any 1113 * ongoing rendering, and automatically ensures that the atomic update waits 1114 * for any pending rendering to complete. This is usually tracked in &struct 1115 * dma_resv which can also contain mandatory kernel fences. Implicit syncing 1116 * is how Linux traditionally worked (e.g. DRI2/3 on X.org), whereas explicit 1117 * fencing is what Android wants. 1118 * 1119 * "IN_FENCE_FD”: 1120 * Use this property to pass a fence that DRM should wait on before 1121 * proceeding with the Atomic Commit request and show the framebuffer for 1122 * the plane on the screen. The fence can be either a normal fence or a 1123 * merged one, the sync_file framework will handle both cases and use a 1124 * fence_array if a merged fence is received. Passing -1 here means no 1125 * fences to wait on. 1126 * 1127 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag 1128 * it will only check if the Sync File is a valid one. 1129 * 1130 * On the driver side the fence is stored on the @fence parameter of 1131 * &struct drm_plane_state. Drivers which also support implicit fencing 1132 * should extract the implicit fence using drm_gem_plane_helper_prepare_fb(), 1133 * to make sure there's consistent behaviour between drivers in precedence 1134 * of implicit vs. explicit fencing. 1135 * 1136 * "OUT_FENCE_PTR”: 1137 * Use this property to pass a file descriptor pointer to DRM. Once the 1138 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with 1139 * the file descriptor number of a Sync File. This Sync File contains the 1140 * CRTC fence that will be signaled when all framebuffers present on the 1141 * Atomic Commit * request for that given CRTC are scanned out on the 1142 * screen. 1143 * 1144 * The Atomic Commit request fails if a invalid pointer is passed. If the 1145 * Atomic Commit request fails for any other reason the out fence fd 1146 * returned will be -1. On a Atomic Commit with the 1147 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. 1148 * 1149 * Note that out-fences don't have a special interface to drivers and are 1150 * internally represented by a &struct drm_pending_vblank_event in struct 1151 * &drm_crtc_state, which is also used by the nonblocking atomic commit 1152 * helpers and for the DRM event handling for existing userspace. 1153 */ 1154 1155 struct drm_out_fence_state { 1156 s32 __user *out_fence_ptr; 1157 struct sync_file *sync_file; 1158 int fd; 1159 }; 1160 1161 static int setup_out_fence(struct drm_out_fence_state *fence_state, 1162 struct dma_fence *fence) 1163 { 1164 fence_state->fd = get_unused_fd_flags(O_CLOEXEC); 1165 if (fence_state->fd < 0) 1166 return fence_state->fd; 1167 1168 if (put_user(fence_state->fd, fence_state->out_fence_ptr)) 1169 return -EFAULT; 1170 1171 fence_state->sync_file = sync_file_create(fence); 1172 if (!fence_state->sync_file) 1173 return -ENOMEM; 1174 1175 return 0; 1176 } 1177 1178 static int prepare_signaling(struct drm_device *dev, 1179 struct drm_atomic_state *state, 1180 struct drm_mode_atomic *arg, 1181 struct drm_file *file_priv, 1182 struct drm_out_fence_state **fence_state, 1183 unsigned int *num_fences) 1184 { 1185 struct drm_crtc *crtc; 1186 struct drm_crtc_state *crtc_state; 1187 struct drm_connector *conn; 1188 struct drm_connector_state *conn_state; 1189 int i, c = 0, ret; 1190 1191 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) 1192 return 0; 1193 1194 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1195 s32 __user *fence_ptr; 1196 1197 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); 1198 1199 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { 1200 struct drm_pending_vblank_event *e; 1201 1202 e = create_vblank_event(crtc, arg->user_data); 1203 if (!e) 1204 return -ENOMEM; 1205 1206 crtc_state->event = e; 1207 } 1208 1209 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { 1210 struct drm_pending_vblank_event *e = crtc_state->event; 1211 1212 if (!file_priv) 1213 continue; 1214 1215 ret = drm_event_reserve_init(dev, file_priv, &e->base, 1216 &e->event.base); 1217 if (ret) { 1218 kfree(e); 1219 crtc_state->event = NULL; 1220 return ret; 1221 } 1222 } 1223 1224 if (fence_ptr) { 1225 struct dma_fence *fence; 1226 struct drm_out_fence_state *f; 1227 1228 f = krealloc(*fence_state, sizeof(**fence_state) * 1229 (*num_fences + 1), GFP_KERNEL); 1230 if (!f) 1231 return -ENOMEM; 1232 1233 memset(&f[*num_fences], 0, sizeof(*f)); 1234 1235 f[*num_fences].out_fence_ptr = fence_ptr; 1236 *fence_state = f; 1237 1238 fence = drm_crtc_create_fence(crtc); 1239 if (!fence) 1240 return -ENOMEM; 1241 1242 ret = setup_out_fence(&f[(*num_fences)++], fence); 1243 if (ret) { 1244 dma_fence_put(fence); 1245 return ret; 1246 } 1247 1248 crtc_state->event->base.fence = fence; 1249 } 1250 1251 c++; 1252 } 1253 1254 for_each_new_connector_in_state(state, conn, conn_state, i) { 1255 struct drm_writeback_connector *wb_conn; 1256 struct drm_out_fence_state *f; 1257 struct dma_fence *fence; 1258 s32 __user *fence_ptr; 1259 1260 if (!conn_state->writeback_job) 1261 continue; 1262 1263 fence_ptr = get_out_fence_for_connector(state, conn); 1264 if (!fence_ptr) 1265 continue; 1266 1267 f = krealloc(*fence_state, sizeof(**fence_state) * 1268 (*num_fences + 1), GFP_KERNEL); 1269 if (!f) 1270 return -ENOMEM; 1271 1272 memset(&f[*num_fences], 0, sizeof(*f)); 1273 1274 f[*num_fences].out_fence_ptr = fence_ptr; 1275 *fence_state = f; 1276 1277 wb_conn = drm_connector_to_writeback(conn); 1278 fence = drm_writeback_get_out_fence(wb_conn); 1279 if (!fence) 1280 return -ENOMEM; 1281 1282 ret = setup_out_fence(&f[(*num_fences)++], fence); 1283 if (ret) { 1284 dma_fence_put(fence); 1285 return ret; 1286 } 1287 1288 conn_state->writeback_job->out_fence = fence; 1289 } 1290 1291 /* 1292 * Having this flag means user mode pends on event which will never 1293 * reach due to lack of at least one CRTC for signaling 1294 */ 1295 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { 1296 drm_dbg_atomic(dev, "need at least one CRTC for DRM_MODE_PAGE_FLIP_EVENT"); 1297 return -EINVAL; 1298 } 1299 1300 return 0; 1301 } 1302 1303 static void complete_signaling(struct drm_device *dev, 1304 struct drm_atomic_state *state, 1305 struct drm_out_fence_state *fence_state, 1306 unsigned int num_fences, 1307 bool install_fds) 1308 { 1309 struct drm_crtc *crtc; 1310 struct drm_crtc_state *crtc_state; 1311 int i; 1312 1313 if (install_fds) { 1314 for (i = 0; i < num_fences; i++) 1315 fd_install(fence_state[i].fd, 1316 fence_state[i].sync_file->file); 1317 1318 kfree(fence_state); 1319 return; 1320 } 1321 1322 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1323 struct drm_pending_vblank_event *event = crtc_state->event; 1324 /* 1325 * Free the allocated event. drm_atomic_helper_setup_commit 1326 * can allocate an event too, so only free it if it's ours 1327 * to prevent a double free in drm_atomic_state_clear. 1328 */ 1329 if (event && (event->base.fence || event->base.file_priv)) { 1330 drm_event_cancel_free(dev, &event->base); 1331 crtc_state->event = NULL; 1332 } 1333 } 1334 1335 if (!fence_state) 1336 return; 1337 1338 for (i = 0; i < num_fences; i++) { 1339 if (fence_state[i].sync_file) 1340 fput(fence_state[i].sync_file->file); 1341 if (fence_state[i].fd >= 0) 1342 put_unused_fd(fence_state[i].fd); 1343 1344 /* If this fails log error to the user */ 1345 if (fence_state[i].out_fence_ptr && 1346 put_user(-1, fence_state[i].out_fence_ptr)) 1347 drm_dbg_atomic(dev, "Couldn't clear out_fence_ptr\n"); 1348 } 1349 1350 kfree(fence_state); 1351 } 1352 1353 static void 1354 set_async_flip(struct drm_atomic_state *state) 1355 { 1356 struct drm_crtc *crtc; 1357 struct drm_crtc_state *crtc_state; 1358 int i; 1359 1360 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1361 crtc_state->async_flip = true; 1362 } 1363 } 1364 1365 int drm_mode_atomic_ioctl(struct drm_device *dev, 1366 void *data, struct drm_file *file_priv) 1367 { 1368 struct drm_mode_atomic *arg = data; 1369 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); 1370 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); 1371 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 1372 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); 1373 unsigned int copied_objs, copied_props; 1374 struct drm_atomic_state *state; 1375 struct drm_modeset_acquire_ctx ctx; 1376 struct drm_out_fence_state *fence_state; 1377 int ret = 0; 1378 unsigned int i, j, num_fences; 1379 bool async_flip = false; 1380 1381 /* disallow for drivers not supporting atomic: */ 1382 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 1383 return -EOPNOTSUPP; 1384 1385 /* disallow for userspace that has not enabled atomic cap (even 1386 * though this may be a bit overkill, since legacy userspace 1387 * wouldn't know how to call this ioctl) 1388 */ 1389 if (!file_priv->atomic) { 1390 drm_dbg_atomic(dev, 1391 "commit failed: atomic cap not enabled\n"); 1392 return -EINVAL; 1393 } 1394 1395 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) { 1396 drm_dbg_atomic(dev, "commit failed: invalid flag\n"); 1397 return -EINVAL; 1398 } 1399 1400 if (arg->reserved) { 1401 drm_dbg_atomic(dev, "commit failed: reserved field set\n"); 1402 return -EINVAL; 1403 } 1404 1405 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) { 1406 if (!dev->mode_config.async_page_flip) { 1407 drm_dbg_atomic(dev, 1408 "commit failed: DRM_MODE_PAGE_FLIP_ASYNC not supported\n"); 1409 return -EINVAL; 1410 } 1411 1412 async_flip = true; 1413 } 1414 1415 /* can't test and expect an event at the same time. */ 1416 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && 1417 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { 1418 drm_dbg_atomic(dev, 1419 "commit failed: page-flip event requested with test-only commit\n"); 1420 return -EINVAL; 1421 } 1422 1423 state = drm_atomic_state_alloc(dev); 1424 if (!state) 1425 return -ENOMEM; 1426 1427 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); 1428 state->acquire_ctx = &ctx; 1429 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); 1430 1431 retry: 1432 copied_objs = 0; 1433 copied_props = 0; 1434 fence_state = NULL; 1435 num_fences = 0; 1436 1437 for (i = 0; i < arg->count_objs; i++) { 1438 uint32_t obj_id, count_props; 1439 struct drm_mode_object *obj; 1440 1441 if (get_user(obj_id, objs_ptr + copied_objs)) { 1442 ret = -EFAULT; 1443 goto out; 1444 } 1445 1446 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY); 1447 if (!obj) { 1448 drm_dbg_atomic(dev, "cannot find object ID %d", obj_id); 1449 ret = -ENOENT; 1450 goto out; 1451 } 1452 1453 if (!obj->properties) { 1454 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties", obj_id); 1455 drm_mode_object_put(obj); 1456 ret = -ENOENT; 1457 goto out; 1458 } 1459 1460 if (get_user(count_props, count_props_ptr + copied_objs)) { 1461 drm_mode_object_put(obj); 1462 ret = -EFAULT; 1463 goto out; 1464 } 1465 1466 copied_objs++; 1467 1468 for (j = 0; j < count_props; j++) { 1469 uint32_t prop_id; 1470 uint64_t prop_value; 1471 struct drm_property *prop; 1472 1473 if (get_user(prop_id, props_ptr + copied_props)) { 1474 drm_mode_object_put(obj); 1475 ret = -EFAULT; 1476 goto out; 1477 } 1478 1479 prop = drm_mode_obj_find_prop_id(obj, prop_id); 1480 if (!prop) { 1481 drm_dbg_atomic(dev, 1482 "[OBJECT:%d] cannot find property ID %d", 1483 obj_id, prop_id); 1484 drm_mode_object_put(obj); 1485 ret = -ENOENT; 1486 goto out; 1487 } 1488 1489 if (copy_from_user(&prop_value, 1490 prop_values_ptr + copied_props, 1491 sizeof(prop_value))) { 1492 drm_mode_object_put(obj); 1493 ret = -EFAULT; 1494 goto out; 1495 } 1496 1497 ret = drm_atomic_set_property(state, file_priv, obj, 1498 prop, prop_value, async_flip); 1499 if (ret) { 1500 drm_mode_object_put(obj); 1501 goto out; 1502 } 1503 1504 copied_props++; 1505 } 1506 1507 drm_mode_object_put(obj); 1508 } 1509 1510 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, 1511 &num_fences); 1512 if (ret) 1513 goto out; 1514 1515 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) 1516 set_async_flip(state); 1517 1518 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { 1519 ret = drm_atomic_check_only(state); 1520 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { 1521 ret = drm_atomic_nonblocking_commit(state); 1522 } else { 1523 ret = drm_atomic_commit(state); 1524 } 1525 1526 out: 1527 complete_signaling(dev, state, fence_state, num_fences, !ret); 1528 1529 if (ret == -EDEADLK) { 1530 drm_atomic_state_clear(state); 1531 ret = drm_modeset_backoff(&ctx); 1532 if (!ret) 1533 goto retry; 1534 } 1535 1536 drm_atomic_state_put(state); 1537 1538 drm_modeset_drop_locks(&ctx); 1539 drm_modeset_acquire_fini(&ctx); 1540 1541 return ret; 1542 } 1543