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 void 270 drm_atomic_set_colorop_for_plane(struct drm_plane_state *plane_state, 271 struct drm_colorop *colorop) 272 { 273 struct drm_plane *plane = plane_state->plane; 274 275 if (colorop) 276 drm_dbg_atomic(plane->dev, 277 "Set [COLOROP:%d] for [PLANE:%d:%s] state %p\n", 278 colorop->base.id, plane->base.id, plane->name, 279 plane_state); 280 else 281 drm_dbg_atomic(plane->dev, 282 "Set [NOCOLOROP] for [PLANE:%d:%s] state %p\n", 283 plane->base.id, plane->name, plane_state); 284 285 plane_state->color_pipeline = colorop; 286 } 287 EXPORT_SYMBOL(drm_atomic_set_colorop_for_plane); 288 289 /** 290 * drm_atomic_set_crtc_for_connector - set CRTC for connector 291 * @conn_state: atomic state object for the connector 292 * @crtc: CRTC to use for the connector 293 * 294 * Changing the assigned CRTC for a connector requires us to grab the lock and 295 * state for the new CRTC, as needed. This function takes care of all these 296 * details besides updating the pointer in the state object itself. 297 * 298 * Returns: 299 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 300 * then the w/w mutex code has detected a deadlock and the entire atomic 301 * sequence must be restarted. All other errors are fatal. 302 */ 303 int 304 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, 305 struct drm_crtc *crtc) 306 { 307 struct drm_connector *connector = conn_state->connector; 308 struct drm_crtc_state *crtc_state; 309 310 if (conn_state->crtc == crtc) 311 return 0; 312 313 if (conn_state->crtc) { 314 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state, 315 conn_state->crtc); 316 317 crtc_state->connector_mask &= 318 ~drm_connector_mask(conn_state->connector); 319 320 drm_connector_put(conn_state->connector); 321 conn_state->crtc = NULL; 322 } 323 324 if (crtc) { 325 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); 326 if (IS_ERR(crtc_state)) 327 return PTR_ERR(crtc_state); 328 329 crtc_state->connector_mask |= 330 drm_connector_mask(conn_state->connector); 331 332 drm_connector_get(conn_state->connector); 333 conn_state->crtc = crtc; 334 335 drm_dbg_atomic(connector->dev, 336 "Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n", 337 connector->base.id, connector->name, 338 conn_state, crtc->base.id, crtc->name); 339 } else { 340 drm_dbg_atomic(connector->dev, 341 "Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n", 342 connector->base.id, connector->name, 343 conn_state); 344 } 345 346 return 0; 347 } 348 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); 349 350 static void set_out_fence_for_crtc(struct drm_atomic_state *state, 351 struct drm_crtc *crtc, s32 __user *fence_ptr) 352 { 353 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; 354 } 355 356 static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state, 357 struct drm_crtc *crtc) 358 { 359 s32 __user *fence_ptr; 360 361 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; 362 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; 363 364 return fence_ptr; 365 } 366 367 static int set_out_fence_for_connector(struct drm_atomic_state *state, 368 struct drm_connector *connector, 369 s32 __user *fence_ptr) 370 { 371 unsigned int index = drm_connector_index(connector); 372 373 if (!fence_ptr) 374 return 0; 375 376 if (put_user(-1, fence_ptr)) 377 return -EFAULT; 378 379 state->connectors[index].out_fence_ptr = fence_ptr; 380 381 return 0; 382 } 383 384 static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state, 385 struct drm_connector *connector) 386 { 387 unsigned int index = drm_connector_index(connector); 388 s32 __user *fence_ptr; 389 390 fence_ptr = state->connectors[index].out_fence_ptr; 391 state->connectors[index].out_fence_ptr = NULL; 392 393 return fence_ptr; 394 } 395 396 static int drm_atomic_crtc_set_property(struct drm_crtc *crtc, 397 struct drm_crtc_state *state, struct drm_property *property, 398 uint64_t val) 399 { 400 struct drm_device *dev = crtc->dev; 401 struct drm_mode_config *config = &dev->mode_config; 402 bool replaced = false; 403 int ret; 404 405 if (property == config->prop_active) 406 state->active = val; 407 else if (property == config->prop_mode_id) { 408 struct drm_property_blob *mode = 409 drm_property_lookup_blob(dev, val); 410 ret = drm_atomic_set_mode_prop_for_crtc(state, mode); 411 drm_property_blob_put(mode); 412 return ret; 413 } else if (property == config->prop_vrr_enabled) { 414 state->vrr_enabled = val; 415 } else if (property == config->degamma_lut_property) { 416 ret = drm_property_replace_blob_from_id(dev, 417 &state->degamma_lut, 418 val, 419 -1, sizeof(struct drm_color_lut), 420 &replaced); 421 state->color_mgmt_changed |= replaced; 422 return ret; 423 } else if (property == config->ctm_property) { 424 ret = drm_property_replace_blob_from_id(dev, 425 &state->ctm, 426 val, 427 sizeof(struct drm_color_ctm), -1, 428 &replaced); 429 state->color_mgmt_changed |= replaced; 430 return ret; 431 } else if (property == config->gamma_lut_property) { 432 ret = drm_property_replace_blob_from_id(dev, 433 &state->gamma_lut, 434 val, 435 -1, sizeof(struct drm_color_lut), 436 &replaced); 437 state->color_mgmt_changed |= replaced; 438 return ret; 439 } else if (property == config->prop_out_fence_ptr) { 440 s32 __user *fence_ptr = u64_to_user_ptr(val); 441 442 if (!fence_ptr) 443 return 0; 444 445 if (put_user(-1, fence_ptr)) 446 return -EFAULT; 447 448 set_out_fence_for_crtc(state->state, crtc, fence_ptr); 449 } else if (property == crtc->scaling_filter_property) { 450 state->scaling_filter = val; 451 } else if (property == crtc->sharpness_strength_property) { 452 state->sharpness_strength = val; 453 } else if (crtc->funcs->atomic_set_property) { 454 return crtc->funcs->atomic_set_property(crtc, state, property, val); 455 } else { 456 drm_dbg_atomic(crtc->dev, 457 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n", 458 crtc->base.id, crtc->name, 459 property->base.id, property->name); 460 return -EINVAL; 461 } 462 463 return 0; 464 } 465 466 static int 467 drm_atomic_crtc_get_property(struct drm_crtc *crtc, 468 const struct drm_crtc_state *state, 469 struct drm_property *property, uint64_t *val) 470 { 471 struct drm_device *dev = crtc->dev; 472 struct drm_mode_config *config = &dev->mode_config; 473 474 if (property == config->prop_active) 475 *val = drm_atomic_crtc_effectively_active(state); 476 else if (property == config->prop_mode_id) 477 *val = (state->mode_blob) ? state->mode_blob->base.id : 0; 478 else if (property == config->prop_vrr_enabled) 479 *val = state->vrr_enabled; 480 else if (property == config->degamma_lut_property) 481 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; 482 else if (property == config->ctm_property) 483 *val = (state->ctm) ? state->ctm->base.id : 0; 484 else if (property == config->gamma_lut_property) 485 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; 486 else if (property == config->prop_out_fence_ptr) 487 *val = 0; 488 else if (property == crtc->scaling_filter_property) 489 *val = state->scaling_filter; 490 else if (property == crtc->sharpness_strength_property) 491 *val = state->sharpness_strength; 492 else if (crtc->funcs->atomic_get_property) 493 return crtc->funcs->atomic_get_property(crtc, state, property, val); 494 else { 495 drm_dbg_atomic(dev, 496 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n", 497 crtc->base.id, crtc->name, 498 property->base.id, property->name); 499 return -EINVAL; 500 } 501 502 return 0; 503 } 504 505 static int drm_atomic_plane_set_property(struct drm_plane *plane, 506 struct drm_plane_state *state, struct drm_file *file_priv, 507 struct drm_property *property, uint64_t val) 508 { 509 struct drm_device *dev = plane->dev; 510 struct drm_mode_config *config = &dev->mode_config; 511 bool replaced = false; 512 int ret; 513 514 if (property == config->prop_fb_id) { 515 struct drm_framebuffer *fb; 516 517 fb = drm_framebuffer_lookup(dev, file_priv, val); 518 drm_atomic_set_fb_for_plane(state, fb); 519 if (fb) 520 drm_framebuffer_put(fb); 521 } else if (property == config->prop_in_fence_fd) { 522 if (state->fence) 523 return -EINVAL; 524 525 if (U642I64(val) == -1) 526 return 0; 527 528 state->fence = sync_file_get_fence(val); 529 if (!state->fence) 530 return -EINVAL; 531 532 } else if (property == config->prop_crtc_id) { 533 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 534 535 if (val && !crtc) { 536 drm_dbg_atomic(dev, 537 "[PROP:%d:%s] cannot find CRTC with ID %llu\n", 538 property->base.id, property->name, val); 539 return -EACCES; 540 } 541 return drm_atomic_set_crtc_for_plane(state, crtc); 542 } else if (property == config->prop_crtc_x) { 543 state->crtc_x = U642I64(val); 544 } else if (property == config->prop_crtc_y) { 545 state->crtc_y = U642I64(val); 546 } else if (property == config->prop_crtc_w) { 547 state->crtc_w = val; 548 } else if (property == config->prop_crtc_h) { 549 state->crtc_h = val; 550 } else if (property == config->prop_src_x) { 551 state->src_x = val; 552 } else if (property == config->prop_src_y) { 553 state->src_y = val; 554 } else if (property == config->prop_src_w) { 555 state->src_w = val; 556 } else if (property == config->prop_src_h) { 557 state->src_h = val; 558 } else if (property == plane->alpha_property) { 559 state->alpha = val; 560 } else if (property == plane->blend_mode_property) { 561 state->pixel_blend_mode = val; 562 } else if (property == plane->rotation_property) { 563 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) { 564 drm_dbg_atomic(plane->dev, 565 "[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n", 566 plane->base.id, plane->name, val); 567 return -EINVAL; 568 } 569 state->rotation = val; 570 } else if (property == plane->zpos_property) { 571 state->zpos = val; 572 } else if (property == plane->color_encoding_property) { 573 state->color_encoding = val; 574 } else if (property == plane->color_range_property) { 575 state->color_range = val; 576 } else if (property == plane->color_pipeline_property) { 577 /* find DRM colorop object */ 578 struct drm_colorop *colorop = NULL; 579 580 colorop = drm_colorop_find(dev, file_priv, val); 581 582 if (val && !colorop) 583 return -EACCES; 584 585 drm_atomic_set_colorop_for_plane(state, colorop); 586 } else if (property == config->prop_fb_damage_clips) { 587 ret = drm_property_replace_blob_from_id(dev, 588 &state->fb_damage_clips, 589 val, 590 -1, 591 sizeof(struct drm_mode_rect), 592 &replaced); 593 return ret; 594 } else if (property == plane->scaling_filter_property) { 595 state->scaling_filter = val; 596 } else if (plane->funcs->atomic_set_property) { 597 return plane->funcs->atomic_set_property(plane, state, 598 property, val); 599 } else if (property == plane->hotspot_x_property) { 600 if (plane->type != DRM_PLANE_TYPE_CURSOR) { 601 drm_dbg_atomic(plane->dev, 602 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n", 603 plane->base.id, plane->name, val); 604 return -EINVAL; 605 } 606 state->hotspot_x = val; 607 } else if (property == plane->hotspot_y_property) { 608 if (plane->type != DRM_PLANE_TYPE_CURSOR) { 609 drm_dbg_atomic(plane->dev, 610 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n", 611 plane->base.id, plane->name, val); 612 return -EINVAL; 613 } 614 state->hotspot_y = val; 615 } else { 616 drm_dbg_atomic(plane->dev, 617 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n", 618 plane->base.id, plane->name, 619 property->base.id, property->name); 620 return -EINVAL; 621 } 622 623 return 0; 624 } 625 626 static int 627 drm_atomic_plane_get_property(struct drm_plane *plane, 628 const struct drm_plane_state *state, 629 struct drm_property *property, uint64_t *val) 630 { 631 struct drm_device *dev = plane->dev; 632 struct drm_mode_config *config = &dev->mode_config; 633 634 if (property == config->prop_fb_id) { 635 *val = (state->fb) ? state->fb->base.id : 0; 636 } else if (property == config->prop_in_fence_fd) { 637 *val = -1; 638 } else if (property == config->prop_crtc_id) { 639 *val = (state->crtc) ? state->crtc->base.id : 0; 640 } else if (property == config->prop_crtc_x) { 641 *val = I642U64(state->crtc_x); 642 } else if (property == config->prop_crtc_y) { 643 *val = I642U64(state->crtc_y); 644 } else if (property == config->prop_crtc_w) { 645 *val = state->crtc_w; 646 } else if (property == config->prop_crtc_h) { 647 *val = state->crtc_h; 648 } else if (property == config->prop_src_x) { 649 *val = state->src_x; 650 } else if (property == config->prop_src_y) { 651 *val = state->src_y; 652 } else if (property == config->prop_src_w) { 653 *val = state->src_w; 654 } else if (property == config->prop_src_h) { 655 *val = state->src_h; 656 } else if (property == plane->alpha_property) { 657 *val = state->alpha; 658 } else if (property == plane->blend_mode_property) { 659 *val = state->pixel_blend_mode; 660 } else if (property == plane->rotation_property) { 661 *val = state->rotation; 662 } else if (property == plane->zpos_property) { 663 *val = state->zpos; 664 } else if (property == plane->color_encoding_property) { 665 *val = state->color_encoding; 666 } else if (property == plane->color_range_property) { 667 *val = state->color_range; 668 } else if (property == plane->color_pipeline_property) { 669 *val = (state->color_pipeline) ? state->color_pipeline->base.id : 0; 670 } else if (property == config->prop_fb_damage_clips) { 671 *val = (state->fb_damage_clips) ? 672 state->fb_damage_clips->base.id : 0; 673 } else if (property == plane->scaling_filter_property) { 674 *val = state->scaling_filter; 675 } else if (plane->funcs->atomic_get_property) { 676 return plane->funcs->atomic_get_property(plane, state, property, val); 677 } else if (property == plane->hotspot_x_property) { 678 *val = state->hotspot_x; 679 } else if (property == plane->hotspot_y_property) { 680 *val = state->hotspot_y; 681 } else { 682 drm_dbg_atomic(dev, 683 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n", 684 plane->base.id, plane->name, 685 property->base.id, property->name); 686 return -EINVAL; 687 } 688 689 return 0; 690 } 691 692 static int drm_atomic_color_set_data_property(struct drm_colorop *colorop, 693 struct drm_colorop_state *state, 694 struct drm_property *property, 695 uint64_t val) 696 { 697 ssize_t elem_size = -1; 698 ssize_t size = -1; 699 bool replaced = false; 700 701 switch (colorop->type) { 702 case DRM_COLOROP_CTM_3X4: 703 size = sizeof(struct drm_color_ctm_3x4); 704 break; 705 default: 706 /* should never get here */ 707 return -EINVAL; 708 } 709 710 return drm_property_replace_blob_from_id(colorop->dev, 711 &state->data, 712 val, 713 size, 714 elem_size, 715 &replaced); 716 } 717 718 static int drm_atomic_colorop_set_property(struct drm_colorop *colorop, 719 struct drm_colorop_state *state, 720 struct drm_file *file_priv, 721 struct drm_property *property, 722 uint64_t val) 723 { 724 if (property == colorop->bypass_property) { 725 state->bypass = val; 726 } else if (property == colorop->curve_1d_type_property) { 727 state->curve_1d_type = val; 728 } else if (property == colorop->data_property) { 729 return drm_atomic_color_set_data_property(colorop, state, 730 property, val); 731 } else { 732 drm_dbg_atomic(colorop->dev, 733 "[COLOROP:%d:%d] unknown property [PROP:%d:%s]\n", 734 colorop->base.id, colorop->type, 735 property->base.id, property->name); 736 return -EINVAL; 737 } 738 739 return 0; 740 } 741 742 static int 743 drm_atomic_colorop_get_property(struct drm_colorop *colorop, 744 const struct drm_colorop_state *state, 745 struct drm_property *property, uint64_t *val) 746 { 747 if (property == colorop->type_property) 748 *val = colorop->type; 749 else if (property == colorop->bypass_property) 750 *val = state->bypass; 751 else if (property == colorop->curve_1d_type_property) 752 *val = state->curve_1d_type; 753 else if (property == colorop->data_property) 754 *val = (state->data) ? state->data->base.id : 0; 755 else 756 return -EINVAL; 757 758 return 0; 759 } 760 761 static int drm_atomic_set_writeback_fb_for_connector( 762 struct drm_connector_state *conn_state, 763 struct drm_framebuffer *fb) 764 { 765 int ret; 766 struct drm_connector *conn = conn_state->connector; 767 768 ret = drm_writeback_set_fb(conn_state, fb); 769 if (ret < 0) 770 return ret; 771 772 if (fb) 773 drm_dbg_atomic(conn->dev, 774 "Set [FB:%d] for connector state %p\n", 775 fb->base.id, conn_state); 776 else 777 drm_dbg_atomic(conn->dev, 778 "Set [NOFB] for connector state %p\n", 779 conn_state); 780 781 return 0; 782 } 783 784 static int drm_atomic_connector_set_property(struct drm_connector *connector, 785 struct drm_connector_state *state, struct drm_file *file_priv, 786 struct drm_property *property, uint64_t val) 787 { 788 struct drm_device *dev = connector->dev; 789 struct drm_mode_config *config = &dev->mode_config; 790 bool replaced = false; 791 int ret; 792 793 if (property == config->prop_crtc_id) { 794 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); 795 796 if (val && !crtc) { 797 drm_dbg_atomic(dev, 798 "[PROP:%d:%s] cannot find CRTC with ID %llu\n", 799 property->base.id, property->name, val); 800 return -EACCES; 801 } 802 return drm_atomic_set_crtc_for_connector(state, crtc); 803 } else if (property == config->dpms_property) { 804 /* setting DPMS property requires special handling, which 805 * is done in legacy setprop path for us. Disallow (for 806 * now?) atomic writes to DPMS property: 807 */ 808 drm_dbg_atomic(dev, 809 "legacy [PROP:%d:%s] can only be set via legacy uAPI\n", 810 property->base.id, property->name); 811 return -EINVAL; 812 } else if (property == config->tv_select_subconnector_property) { 813 state->tv.select_subconnector = val; 814 } else if (property == config->tv_subconnector_property) { 815 state->tv.subconnector = val; 816 } else if (property == config->tv_left_margin_property) { 817 state->tv.margins.left = val; 818 } else if (property == config->tv_right_margin_property) { 819 state->tv.margins.right = val; 820 } else if (property == config->tv_top_margin_property) { 821 state->tv.margins.top = val; 822 } else if (property == config->tv_bottom_margin_property) { 823 state->tv.margins.bottom = val; 824 } else if (property == config->legacy_tv_mode_property) { 825 state->tv.legacy_mode = val; 826 } else if (property == config->tv_mode_property) { 827 state->tv.mode = val; 828 } else if (property == config->tv_brightness_property) { 829 state->tv.brightness = val; 830 } else if (property == config->tv_contrast_property) { 831 state->tv.contrast = val; 832 } else if (property == config->tv_flicker_reduction_property) { 833 state->tv.flicker_reduction = val; 834 } else if (property == config->tv_overscan_property) { 835 state->tv.overscan = val; 836 } else if (property == config->tv_saturation_property) { 837 state->tv.saturation = val; 838 } else if (property == config->tv_hue_property) { 839 state->tv.hue = val; 840 } else if (property == config->link_status_property) { 841 /* Never downgrade from GOOD to BAD on userspace's request here, 842 * only hw issues can do that. 843 * 844 * For an atomic property the userspace doesn't need to be able 845 * to understand all the properties, but needs to be able to 846 * restore the state it wants on VT switch. So if the userspace 847 * tries to change the link_status from GOOD to BAD, driver 848 * silently rejects it and returns a 0. This prevents userspace 849 * from accidentally breaking the display when it restores the 850 * state. 851 */ 852 if (state->link_status != DRM_LINK_STATUS_GOOD) 853 state->link_status = val; 854 } else if (property == config->hdr_output_metadata_property) { 855 ret = drm_property_replace_blob_from_id(dev, 856 &state->hdr_output_metadata, 857 val, 858 sizeof(struct hdr_output_metadata), -1, 859 &replaced); 860 return ret; 861 } else if (property == config->aspect_ratio_property) { 862 state->picture_aspect_ratio = val; 863 } else if (property == config->content_type_property) { 864 state->content_type = val; 865 } else if (property == connector->scaling_mode_property) { 866 state->scaling_mode = val; 867 } else if (property == config->content_protection_property) { 868 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) { 869 drm_dbg_kms(dev, "only drivers can set CP Enabled\n"); 870 return -EINVAL; 871 } 872 state->content_protection = val; 873 } else if (property == config->hdcp_content_type_property) { 874 state->hdcp_content_type = val; 875 } else if (property == connector->colorspace_property) { 876 state->colorspace = val; 877 } else if (property == config->writeback_fb_id_property) { 878 struct drm_framebuffer *fb; 879 int ret; 880 881 fb = drm_framebuffer_lookup(dev, file_priv, val); 882 ret = drm_atomic_set_writeback_fb_for_connector(state, fb); 883 if (fb) 884 drm_framebuffer_put(fb); 885 return ret; 886 } else if (property == config->writeback_out_fence_ptr_property) { 887 s32 __user *fence_ptr = u64_to_user_ptr(val); 888 889 return set_out_fence_for_connector(state->state, connector, 890 fence_ptr); 891 } else if (property == connector->max_bpc_property) { 892 state->max_requested_bpc = val; 893 } else if (property == connector->privacy_screen_sw_state_property) { 894 state->privacy_screen_sw_state = val; 895 } else if (property == connector->broadcast_rgb_property) { 896 state->hdmi.broadcast_rgb = val; 897 } else if (connector->funcs->atomic_set_property) { 898 return connector->funcs->atomic_set_property(connector, 899 state, property, val); 900 } else { 901 drm_dbg_atomic(connector->dev, 902 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n", 903 connector->base.id, connector->name, 904 property->base.id, property->name); 905 return -EINVAL; 906 } 907 908 return 0; 909 } 910 911 static int 912 drm_atomic_connector_get_property(struct drm_connector *connector, 913 const struct drm_connector_state *state, 914 struct drm_property *property, uint64_t *val) 915 { 916 struct drm_device *dev = connector->dev; 917 struct drm_mode_config *config = &dev->mode_config; 918 919 if (property == config->prop_crtc_id) { 920 *val = (state->crtc) ? state->crtc->base.id : 0; 921 } else if (property == config->dpms_property) { 922 if (state->crtc && state->crtc->state->self_refresh_active) 923 *val = DRM_MODE_DPMS_ON; 924 else 925 *val = connector->dpms; 926 } else if (property == config->tv_select_subconnector_property) { 927 *val = state->tv.select_subconnector; 928 } else if (property == config->tv_subconnector_property) { 929 *val = state->tv.subconnector; 930 } else if (property == config->tv_left_margin_property) { 931 *val = state->tv.margins.left; 932 } else if (property == config->tv_right_margin_property) { 933 *val = state->tv.margins.right; 934 } else if (property == config->tv_top_margin_property) { 935 *val = state->tv.margins.top; 936 } else if (property == config->tv_bottom_margin_property) { 937 *val = state->tv.margins.bottom; 938 } else if (property == config->legacy_tv_mode_property) { 939 *val = state->tv.legacy_mode; 940 } else if (property == config->tv_mode_property) { 941 *val = state->tv.mode; 942 } else if (property == config->tv_brightness_property) { 943 *val = state->tv.brightness; 944 } else if (property == config->tv_contrast_property) { 945 *val = state->tv.contrast; 946 } else if (property == config->tv_flicker_reduction_property) { 947 *val = state->tv.flicker_reduction; 948 } else if (property == config->tv_overscan_property) { 949 *val = state->tv.overscan; 950 } else if (property == config->tv_saturation_property) { 951 *val = state->tv.saturation; 952 } else if (property == config->tv_hue_property) { 953 *val = state->tv.hue; 954 } else if (property == config->link_status_property) { 955 *val = state->link_status; 956 } else if (property == config->aspect_ratio_property) { 957 *val = state->picture_aspect_ratio; 958 } else if (property == config->content_type_property) { 959 *val = state->content_type; 960 } else if (property == connector->colorspace_property) { 961 *val = state->colorspace; 962 } else if (property == connector->scaling_mode_property) { 963 *val = state->scaling_mode; 964 } else if (property == config->hdr_output_metadata_property) { 965 *val = state->hdr_output_metadata ? 966 state->hdr_output_metadata->base.id : 0; 967 } else if (property == config->content_protection_property) { 968 *val = state->content_protection; 969 } else if (property == config->hdcp_content_type_property) { 970 *val = state->hdcp_content_type; 971 } else if (property == config->writeback_fb_id_property) { 972 /* Writeback framebuffer is one-shot, write and forget */ 973 *val = 0; 974 } else if (property == config->writeback_out_fence_ptr_property) { 975 *val = 0; 976 } else if (property == connector->max_bpc_property) { 977 *val = state->max_requested_bpc; 978 } else if (property == connector->privacy_screen_sw_state_property) { 979 *val = state->privacy_screen_sw_state; 980 } else if (property == connector->broadcast_rgb_property) { 981 *val = state->hdmi.broadcast_rgb; 982 } else if (connector->funcs->atomic_get_property) { 983 return connector->funcs->atomic_get_property(connector, 984 state, property, val); 985 } else { 986 drm_dbg_atomic(dev, 987 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n", 988 connector->base.id, connector->name, 989 property->base.id, property->name); 990 return -EINVAL; 991 } 992 993 return 0; 994 } 995 996 int drm_atomic_get_property(struct drm_mode_object *obj, 997 struct drm_property *property, uint64_t *val) 998 { 999 struct drm_device *dev = property->dev; 1000 int ret; 1001 1002 switch (obj->type) { 1003 case DRM_MODE_OBJECT_CONNECTOR: { 1004 struct drm_connector *connector = obj_to_connector(obj); 1005 1006 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 1007 ret = drm_atomic_connector_get_property(connector, 1008 connector->state, property, val); 1009 break; 1010 } 1011 case DRM_MODE_OBJECT_CRTC: { 1012 struct drm_crtc *crtc = obj_to_crtc(obj); 1013 1014 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 1015 ret = drm_atomic_crtc_get_property(crtc, 1016 crtc->state, property, val); 1017 break; 1018 } 1019 case DRM_MODE_OBJECT_PLANE: { 1020 struct drm_plane *plane = obj_to_plane(obj); 1021 1022 WARN_ON(!drm_modeset_is_locked(&plane->mutex)); 1023 ret = drm_atomic_plane_get_property(plane, 1024 plane->state, property, val); 1025 break; 1026 } 1027 case DRM_MODE_OBJECT_COLOROP: { 1028 struct drm_colorop *colorop = obj_to_colorop(obj); 1029 1030 if (colorop->plane) 1031 WARN_ON(!drm_modeset_is_locked(&colorop->plane->mutex)); 1032 1033 ret = drm_atomic_colorop_get_property(colorop, colorop->state, property, val); 1034 break; 1035 } 1036 default: 1037 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties\n", obj->id); 1038 ret = -EINVAL; 1039 break; 1040 } 1041 1042 return ret; 1043 } 1044 1045 /* 1046 * The big monster ioctl 1047 */ 1048 1049 static struct drm_pending_vblank_event *create_vblank_event( 1050 struct drm_crtc *crtc, uint64_t user_data) 1051 { 1052 struct drm_pending_vblank_event *e = NULL; 1053 1054 e = kzalloc(sizeof *e, GFP_KERNEL); 1055 if (!e) 1056 return NULL; 1057 1058 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 1059 e->event.base.length = sizeof(e->event); 1060 e->event.vbl.crtc_id = crtc->base.id; 1061 e->event.vbl.user_data = user_data; 1062 1063 return e; 1064 } 1065 1066 int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state, 1067 struct drm_connector *connector, 1068 int mode) 1069 { 1070 struct drm_connector *tmp_connector; 1071 struct drm_connector_state *new_conn_state; 1072 struct drm_crtc *crtc; 1073 struct drm_crtc_state *crtc_state; 1074 int i, ret, old_mode = connector->dpms; 1075 bool active = false; 1076 1077 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, 1078 state->acquire_ctx); 1079 if (ret) 1080 return ret; 1081 1082 if (mode != DRM_MODE_DPMS_ON) 1083 mode = DRM_MODE_DPMS_OFF; 1084 1085 if (connector->dpms == mode) 1086 goto out; 1087 1088 connector->dpms = mode; 1089 1090 crtc = connector->state->crtc; 1091 if (!crtc) 1092 goto out; 1093 ret = drm_atomic_add_affected_connectors(state, crtc); 1094 if (ret) 1095 goto out; 1096 1097 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1098 if (IS_ERR(crtc_state)) { 1099 ret = PTR_ERR(crtc_state); 1100 goto out; 1101 } 1102 1103 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) { 1104 if (new_conn_state->crtc != crtc) 1105 continue; 1106 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { 1107 active = true; 1108 break; 1109 } 1110 } 1111 1112 crtc_state->active = active; 1113 ret = drm_atomic_commit(state); 1114 out: 1115 if (ret != 0) 1116 connector->dpms = old_mode; 1117 return ret; 1118 } 1119 1120 static int drm_atomic_check_prop_changes(int ret, uint64_t old_val, uint64_t prop_value, 1121 struct drm_property *prop) 1122 { 1123 if (ret != 0 || old_val != prop_value) { 1124 drm_dbg_atomic(prop->dev, 1125 "[PROP:%d:%s] No prop can be changed during async flip\n", 1126 prop->base.id, prop->name); 1127 return -EINVAL; 1128 } 1129 1130 return 0; 1131 } 1132 1133 int drm_atomic_set_property(struct drm_atomic_state *state, 1134 struct drm_file *file_priv, 1135 struct drm_mode_object *obj, 1136 struct drm_property *prop, 1137 u64 prop_value, 1138 bool async_flip) 1139 { 1140 struct drm_mode_object *ref; 1141 u64 old_val; 1142 int ret; 1143 1144 if (!drm_property_change_valid_get(prop, prop_value, &ref)) 1145 return -EINVAL; 1146 1147 switch (obj->type) { 1148 case DRM_MODE_OBJECT_CONNECTOR: { 1149 struct drm_connector *connector = obj_to_connector(obj); 1150 struct drm_connector_state *connector_state; 1151 1152 connector_state = drm_atomic_get_connector_state(state, connector); 1153 if (IS_ERR(connector_state)) { 1154 ret = PTR_ERR(connector_state); 1155 break; 1156 } 1157 1158 if (async_flip) { 1159 ret = drm_atomic_connector_get_property(connector, connector_state, 1160 prop, &old_val); 1161 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 1162 break; 1163 } 1164 1165 ret = drm_atomic_connector_set_property(connector, 1166 connector_state, file_priv, 1167 prop, prop_value); 1168 break; 1169 } 1170 case DRM_MODE_OBJECT_CRTC: { 1171 struct drm_crtc *crtc = obj_to_crtc(obj); 1172 struct drm_crtc_state *crtc_state; 1173 1174 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1175 if (IS_ERR(crtc_state)) { 1176 ret = PTR_ERR(crtc_state); 1177 break; 1178 } 1179 1180 if (async_flip) { 1181 ret = drm_atomic_crtc_get_property(crtc, crtc_state, 1182 prop, &old_val); 1183 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 1184 break; 1185 } 1186 1187 ret = drm_atomic_crtc_set_property(crtc, 1188 crtc_state, prop, prop_value); 1189 break; 1190 } 1191 case DRM_MODE_OBJECT_PLANE: { 1192 struct drm_plane *plane = obj_to_plane(obj); 1193 struct drm_plane_state *plane_state; 1194 struct drm_mode_config *config = &plane->dev->mode_config; 1195 const struct drm_plane_helper_funcs *plane_funcs = plane->helper_private; 1196 1197 plane_state = drm_atomic_get_plane_state(state, plane); 1198 if (IS_ERR(plane_state)) { 1199 ret = PTR_ERR(plane_state); 1200 break; 1201 } 1202 1203 if (async_flip) { 1204 /* no-op changes are always allowed */ 1205 ret = drm_atomic_plane_get_property(plane, plane_state, 1206 prop, &old_val); 1207 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop); 1208 1209 /* fail everything that isn't no-op or a pure flip */ 1210 if (ret && prop != config->prop_fb_id && 1211 prop != config->prop_in_fence_fd && 1212 prop != config->prop_fb_damage_clips) { 1213 break; 1214 } 1215 1216 if (ret && plane->type != DRM_PLANE_TYPE_PRIMARY) { 1217 /* ask the driver if this non-primary plane is supported */ 1218 if (plane_funcs && plane_funcs->atomic_async_check) 1219 ret = plane_funcs->atomic_async_check(plane, state, true); 1220 1221 if (ret) { 1222 drm_dbg_atomic(prop->dev, 1223 "[PLANE:%d:%s] does not support async flips\n", 1224 obj->id, plane->name); 1225 break; 1226 } 1227 } 1228 } 1229 1230 ret = drm_atomic_plane_set_property(plane, 1231 plane_state, file_priv, 1232 prop, prop_value); 1233 1234 break; 1235 } 1236 case DRM_MODE_OBJECT_COLOROP: { 1237 struct drm_colorop *colorop = obj_to_colorop(obj); 1238 struct drm_colorop_state *colorop_state; 1239 1240 colorop_state = drm_atomic_get_colorop_state(state, colorop); 1241 if (IS_ERR(colorop_state)) { 1242 ret = PTR_ERR(colorop_state); 1243 break; 1244 } 1245 1246 ret = drm_atomic_colorop_set_property(colorop, colorop_state, 1247 file_priv, prop, prop_value); 1248 break; 1249 } 1250 default: 1251 drm_dbg_atomic(prop->dev, "[OBJECT:%d] has no properties\n", obj->id); 1252 ret = -EINVAL; 1253 break; 1254 } 1255 1256 drm_property_change_valid_put(prop, ref); 1257 return ret; 1258 } 1259 1260 /** 1261 * DOC: explicit fencing properties 1262 * 1263 * Explicit fencing allows userspace to control the buffer synchronization 1264 * between devices. A Fence or a group of fences are transferred to/from 1265 * userspace using Sync File fds and there are two DRM properties for that. 1266 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and 1267 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. 1268 * 1269 * As a contrast, with implicit fencing the kernel keeps track of any 1270 * ongoing rendering, and automatically ensures that the atomic update waits 1271 * for any pending rendering to complete. This is usually tracked in &struct 1272 * dma_resv which can also contain mandatory kernel fences. Implicit syncing 1273 * is how Linux traditionally worked (e.g. DRI2/3 on X.org), whereas explicit 1274 * fencing is what Android wants. 1275 * 1276 * "IN_FENCE_FD”: 1277 * Use this property to pass a fence that DRM should wait on before 1278 * proceeding with the Atomic Commit request and show the framebuffer for 1279 * the plane on the screen. The fence can be either a normal fence or a 1280 * merged one, the sync_file framework will handle both cases and use a 1281 * fence_array if a merged fence is received. Passing -1 here means no 1282 * fences to wait on. 1283 * 1284 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag 1285 * it will only check if the Sync File is a valid one. 1286 * 1287 * On the driver side the fence is stored on the @fence parameter of 1288 * &struct drm_plane_state. Drivers which also support implicit fencing 1289 * should extract the implicit fence using drm_gem_plane_helper_prepare_fb(), 1290 * to make sure there's consistent behaviour between drivers in precedence 1291 * of implicit vs. explicit fencing. 1292 * 1293 * "OUT_FENCE_PTR”: 1294 * Use this property to pass a file descriptor pointer to DRM. Once the 1295 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with 1296 * the file descriptor number of a Sync File. This Sync File contains the 1297 * CRTC fence that will be signaled when all framebuffers present on the 1298 * Atomic Commit * request for that given CRTC are scanned out on the 1299 * screen. 1300 * 1301 * The Atomic Commit request fails if a invalid pointer is passed. If the 1302 * Atomic Commit request fails for any other reason the out fence fd 1303 * returned will be -1. On a Atomic Commit with the 1304 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. 1305 * 1306 * Note that out-fences don't have a special interface to drivers and are 1307 * internally represented by a &struct drm_pending_vblank_event in struct 1308 * &drm_crtc_state, which is also used by the nonblocking atomic commit 1309 * helpers and for the DRM event handling for existing userspace. 1310 */ 1311 1312 struct drm_out_fence_state { 1313 s32 __user *out_fence_ptr; 1314 struct sync_file *sync_file; 1315 int fd; 1316 }; 1317 1318 static int setup_out_fence(struct drm_out_fence_state *fence_state, 1319 struct dma_fence *fence) 1320 { 1321 fence_state->fd = get_unused_fd_flags(O_CLOEXEC); 1322 if (fence_state->fd < 0) 1323 return fence_state->fd; 1324 1325 if (put_user(fence_state->fd, fence_state->out_fence_ptr)) 1326 return -EFAULT; 1327 1328 fence_state->sync_file = sync_file_create(fence); 1329 if (!fence_state->sync_file) 1330 return -ENOMEM; 1331 1332 return 0; 1333 } 1334 1335 static int prepare_signaling(struct drm_device *dev, 1336 struct drm_atomic_state *state, 1337 struct drm_mode_atomic *arg, 1338 struct drm_file *file_priv, 1339 struct drm_out_fence_state **fence_state, 1340 unsigned int *num_fences) 1341 { 1342 struct drm_crtc *crtc; 1343 struct drm_crtc_state *crtc_state; 1344 struct drm_connector *conn; 1345 struct drm_connector_state *conn_state; 1346 int i, c = 0, ret; 1347 1348 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) 1349 return 0; 1350 1351 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1352 s32 __user *fence_ptr; 1353 1354 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); 1355 1356 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { 1357 struct drm_pending_vblank_event *e; 1358 1359 e = create_vblank_event(crtc, arg->user_data); 1360 if (!e) 1361 return -ENOMEM; 1362 1363 crtc_state->event = e; 1364 } 1365 1366 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { 1367 struct drm_pending_vblank_event *e = crtc_state->event; 1368 1369 if (!file_priv) 1370 continue; 1371 1372 ret = drm_event_reserve_init(dev, file_priv, &e->base, 1373 &e->event.base); 1374 if (ret) { 1375 kfree(e); 1376 crtc_state->event = NULL; 1377 return ret; 1378 } 1379 } 1380 1381 if (fence_ptr) { 1382 struct dma_fence *fence; 1383 struct drm_out_fence_state *f; 1384 1385 f = krealloc(*fence_state, sizeof(**fence_state) * 1386 (*num_fences + 1), GFP_KERNEL); 1387 if (!f) 1388 return -ENOMEM; 1389 1390 memset(&f[*num_fences], 0, sizeof(*f)); 1391 1392 f[*num_fences].out_fence_ptr = fence_ptr; 1393 *fence_state = f; 1394 1395 fence = drm_crtc_create_fence(crtc); 1396 if (!fence) 1397 return -ENOMEM; 1398 1399 ret = setup_out_fence(&f[(*num_fences)++], fence); 1400 if (ret) { 1401 dma_fence_put(fence); 1402 return ret; 1403 } 1404 1405 crtc_state->event->base.fence = fence; 1406 } 1407 1408 c++; 1409 } 1410 1411 for_each_new_connector_in_state(state, conn, conn_state, i) { 1412 struct drm_writeback_connector *wb_conn; 1413 struct drm_out_fence_state *f; 1414 struct dma_fence *fence; 1415 s32 __user *fence_ptr; 1416 1417 if (!conn_state->writeback_job) 1418 continue; 1419 1420 fence_ptr = get_out_fence_for_connector(state, conn); 1421 if (!fence_ptr) 1422 continue; 1423 1424 f = krealloc(*fence_state, sizeof(**fence_state) * 1425 (*num_fences + 1), GFP_KERNEL); 1426 if (!f) 1427 return -ENOMEM; 1428 1429 memset(&f[*num_fences], 0, sizeof(*f)); 1430 1431 f[*num_fences].out_fence_ptr = fence_ptr; 1432 *fence_state = f; 1433 1434 wb_conn = drm_connector_to_writeback(conn); 1435 fence = drm_writeback_get_out_fence(wb_conn); 1436 if (!fence) 1437 return -ENOMEM; 1438 1439 ret = setup_out_fence(&f[(*num_fences)++], fence); 1440 if (ret) { 1441 dma_fence_put(fence); 1442 return ret; 1443 } 1444 1445 conn_state->writeback_job->out_fence = fence; 1446 } 1447 1448 /* 1449 * Having this flag means user mode pends on event which will never 1450 * reach due to lack of at least one CRTC for signaling 1451 */ 1452 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { 1453 drm_dbg_atomic(dev, "need at least one CRTC for DRM_MODE_PAGE_FLIP_EVENT"); 1454 return -EINVAL; 1455 } 1456 1457 return 0; 1458 } 1459 1460 static void complete_signaling(struct drm_device *dev, 1461 struct drm_atomic_state *state, 1462 struct drm_out_fence_state *fence_state, 1463 unsigned int num_fences, 1464 bool install_fds) 1465 { 1466 struct drm_crtc *crtc; 1467 struct drm_crtc_state *crtc_state; 1468 int i; 1469 1470 if (install_fds) { 1471 for (i = 0; i < num_fences; i++) 1472 fd_install(fence_state[i].fd, 1473 fence_state[i].sync_file->file); 1474 1475 kfree(fence_state); 1476 return; 1477 } 1478 1479 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1480 struct drm_pending_vblank_event *event = crtc_state->event; 1481 /* 1482 * Free the allocated event. drm_atomic_helper_setup_commit 1483 * can allocate an event too, so only free it if it's ours 1484 * to prevent a double free in drm_atomic_state_clear. 1485 */ 1486 if (event && (event->base.fence || event->base.file_priv)) { 1487 drm_event_cancel_free(dev, &event->base); 1488 crtc_state->event = NULL; 1489 } 1490 } 1491 1492 if (!fence_state) 1493 return; 1494 1495 for (i = 0; i < num_fences; i++) { 1496 if (fence_state[i].sync_file) 1497 fput(fence_state[i].sync_file->file); 1498 if (fence_state[i].fd >= 0) 1499 put_unused_fd(fence_state[i].fd); 1500 1501 /* If this fails log error to the user */ 1502 if (fence_state[i].out_fence_ptr && 1503 put_user(-1, fence_state[i].out_fence_ptr)) 1504 drm_dbg_atomic(dev, "Couldn't clear out_fence_ptr\n"); 1505 } 1506 1507 kfree(fence_state); 1508 } 1509 1510 static void 1511 set_async_flip(struct drm_atomic_state *state) 1512 { 1513 struct drm_crtc *crtc; 1514 struct drm_crtc_state *crtc_state; 1515 int i; 1516 1517 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1518 crtc_state->async_flip = true; 1519 } 1520 } 1521 1522 int drm_mode_atomic_ioctl(struct drm_device *dev, 1523 void *data, struct drm_file *file_priv) 1524 { 1525 struct drm_mode_atomic *arg = data; 1526 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); 1527 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); 1528 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 1529 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); 1530 unsigned int copied_objs, copied_props; 1531 struct drm_atomic_state *state; 1532 struct drm_modeset_acquire_ctx ctx; 1533 struct drm_out_fence_state *fence_state; 1534 int ret = 0; 1535 unsigned int i, j, num_fences; 1536 bool async_flip = false; 1537 1538 /* disallow for drivers not supporting atomic: */ 1539 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 1540 return -EOPNOTSUPP; 1541 1542 /* disallow for userspace that has not enabled atomic cap (even 1543 * though this may be a bit overkill, since legacy userspace 1544 * wouldn't know how to call this ioctl) 1545 */ 1546 if (!file_priv->atomic) { 1547 drm_dbg_atomic(dev, 1548 "commit failed: atomic cap not enabled\n"); 1549 return -EINVAL; 1550 } 1551 1552 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) { 1553 drm_dbg_atomic(dev, "commit failed: invalid flag\n"); 1554 return -EINVAL; 1555 } 1556 1557 if (arg->reserved) { 1558 drm_dbg_atomic(dev, "commit failed: reserved field set\n"); 1559 return -EINVAL; 1560 } 1561 1562 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) { 1563 if (!dev->mode_config.async_page_flip) { 1564 drm_dbg_atomic(dev, 1565 "commit failed: DRM_MODE_PAGE_FLIP_ASYNC not supported\n"); 1566 return -EINVAL; 1567 } 1568 1569 async_flip = true; 1570 } 1571 1572 /* can't test and expect an event at the same time. */ 1573 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && 1574 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { 1575 drm_dbg_atomic(dev, 1576 "commit failed: page-flip event requested with test-only commit\n"); 1577 return -EINVAL; 1578 } 1579 1580 state = drm_atomic_state_alloc(dev); 1581 if (!state) 1582 return -ENOMEM; 1583 1584 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); 1585 state->acquire_ctx = &ctx; 1586 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); 1587 1588 retry: 1589 copied_objs = 0; 1590 copied_props = 0; 1591 fence_state = NULL; 1592 num_fences = 0; 1593 1594 for (i = 0; i < arg->count_objs; i++) { 1595 uint32_t obj_id, count_props; 1596 struct drm_mode_object *obj; 1597 1598 if (get_user(obj_id, objs_ptr + copied_objs)) { 1599 ret = -EFAULT; 1600 goto out; 1601 } 1602 1603 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY); 1604 if (!obj) { 1605 drm_dbg_atomic(dev, "cannot find object ID %d", obj_id); 1606 ret = -ENOENT; 1607 goto out; 1608 } 1609 1610 if (!obj->properties) { 1611 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties", obj_id); 1612 drm_mode_object_put(obj); 1613 ret = -ENOENT; 1614 goto out; 1615 } 1616 1617 if (get_user(count_props, count_props_ptr + copied_objs)) { 1618 drm_mode_object_put(obj); 1619 ret = -EFAULT; 1620 goto out; 1621 } 1622 1623 copied_objs++; 1624 1625 for (j = 0; j < count_props; j++) { 1626 uint32_t prop_id; 1627 uint64_t prop_value; 1628 struct drm_property *prop; 1629 1630 if (get_user(prop_id, props_ptr + copied_props)) { 1631 drm_mode_object_put(obj); 1632 ret = -EFAULT; 1633 goto out; 1634 } 1635 1636 prop = drm_mode_obj_find_prop_id(obj, prop_id); 1637 if (!prop) { 1638 drm_dbg_atomic(dev, 1639 "[OBJECT:%d] cannot find property ID %d", 1640 obj_id, prop_id); 1641 drm_mode_object_put(obj); 1642 ret = -ENOENT; 1643 goto out; 1644 } 1645 1646 if (copy_from_user(&prop_value, 1647 prop_values_ptr + copied_props, 1648 sizeof(prop_value))) { 1649 drm_mode_object_put(obj); 1650 ret = -EFAULT; 1651 goto out; 1652 } 1653 1654 ret = drm_atomic_set_property(state, file_priv, obj, 1655 prop, prop_value, async_flip); 1656 if (ret) { 1657 drm_mode_object_put(obj); 1658 goto out; 1659 } 1660 1661 copied_props++; 1662 } 1663 1664 drm_mode_object_put(obj); 1665 } 1666 1667 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, 1668 &num_fences); 1669 if (ret) 1670 goto out; 1671 1672 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) 1673 set_async_flip(state); 1674 1675 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { 1676 ret = drm_atomic_check_only(state); 1677 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { 1678 ret = drm_atomic_nonblocking_commit(state); 1679 } else { 1680 ret = drm_atomic_commit(state); 1681 } 1682 1683 out: 1684 complete_signaling(dev, state, fence_state, num_fences, !ret); 1685 1686 if (ret == -EDEADLK) { 1687 drm_atomic_state_clear(state); 1688 ret = drm_modeset_backoff(&ctx); 1689 if (!ret) 1690 goto retry; 1691 } 1692 1693 drm_atomic_state_put(state); 1694 1695 drm_modeset_drop_locks(&ctx); 1696 drm_modeset_acquire_fini(&ctx); 1697 1698 return ret; 1699 } 1700