1 /* 2 * Copyright (C) 2014 Red Hat 3 * Copyright (C) 2014 Intel Corp. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 21 * OTHER DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * Rob Clark <robdclark@gmail.com> 25 * Daniel Vetter <daniel.vetter@ffwll.ch> 26 */ 27 28 29 #include <drm/drmP.h> 30 #include <drm/drm_atomic.h> 31 #include <drm/drm_mode.h> 32 #include <drm/drm_plane_helper.h> 33 #include <drm/drm_print.h> 34 #include <linux/sync_file.h> 35 36 #include "drm_crtc_internal.h" 37 38 void __drm_crtc_commit_free(struct kref *kref) 39 { 40 struct drm_crtc_commit *commit = 41 container_of(kref, struct drm_crtc_commit, ref); 42 43 kfree(commit); 44 } 45 EXPORT_SYMBOL(__drm_crtc_commit_free); 46 47 /** 48 * drm_atomic_state_default_release - 49 * release memory initialized by drm_atomic_state_init 50 * @state: atomic state 51 * 52 * Free all the memory allocated by drm_atomic_state_init. 53 * This is useful for drivers that subclass the atomic state. 54 */ 55 void drm_atomic_state_default_release(struct drm_atomic_state *state) 56 { 57 kfree(state->connectors); 58 kfree(state->crtcs); 59 kfree(state->planes); 60 } 61 EXPORT_SYMBOL(drm_atomic_state_default_release); 62 63 /** 64 * drm_atomic_state_init - init new atomic state 65 * @dev: DRM device 66 * @state: atomic state 67 * 68 * Default implementation for filling in a new atomic state. 69 * This is useful for drivers that subclass the atomic state. 70 */ 71 int 72 drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state) 73 { 74 kref_init(&state->ref); 75 76 /* TODO legacy paths should maybe do a better job about 77 * setting this appropriately? 78 */ 79 state->allow_modeset = true; 80 81 state->crtcs = kcalloc(dev->mode_config.num_crtc, 82 sizeof(*state->crtcs), GFP_KERNEL); 83 if (!state->crtcs) 84 goto fail; 85 state->planes = kcalloc(dev->mode_config.num_total_plane, 86 sizeof(*state->planes), GFP_KERNEL); 87 if (!state->planes) 88 goto fail; 89 90 state->dev = dev; 91 92 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state); 93 94 return 0; 95 fail: 96 drm_atomic_state_default_release(state); 97 return -ENOMEM; 98 } 99 EXPORT_SYMBOL(drm_atomic_state_init); 100 101 /** 102 * drm_atomic_state_alloc - allocate atomic state 103 * @dev: DRM device 104 * 105 * This allocates an empty atomic state to track updates. 106 */ 107 struct drm_atomic_state * 108 drm_atomic_state_alloc(struct drm_device *dev) 109 { 110 struct drm_mode_config *config = &dev->mode_config; 111 struct drm_atomic_state *state; 112 113 if (!config->funcs->atomic_state_alloc) { 114 state = kzalloc(sizeof(*state), GFP_KERNEL); 115 if (!state) 116 return NULL; 117 if (drm_atomic_state_init(dev, state) < 0) { 118 kfree(state); 119 return NULL; 120 } 121 return state; 122 } 123 124 return config->funcs->atomic_state_alloc(dev); 125 } 126 EXPORT_SYMBOL(drm_atomic_state_alloc); 127 128 /** 129 * drm_atomic_state_default_clear - clear base atomic state 130 * @state: atomic state 131 * 132 * Default implementation for clearing atomic state. 133 * This is useful for drivers that subclass the atomic state. 134 */ 135 void drm_atomic_state_default_clear(struct drm_atomic_state *state) 136 { 137 struct drm_device *dev = state->dev; 138 struct drm_mode_config *config = &dev->mode_config; 139 int i; 140 141 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state); 142 143 for (i = 0; i < state->num_connector; i++) { 144 struct drm_connector *connector = state->connectors[i].ptr; 145 146 if (!connector) 147 continue; 148 149 connector->funcs->atomic_destroy_state(connector, 150 state->connectors[i].state); 151 state->connectors[i].ptr = NULL; 152 state->connectors[i].state = NULL; 153 drm_connector_put(connector); 154 } 155 156 for (i = 0; i < config->num_crtc; i++) { 157 struct drm_crtc *crtc = state->crtcs[i].ptr; 158 159 if (!crtc) 160 continue; 161 162 crtc->funcs->atomic_destroy_state(crtc, 163 state->crtcs[i].state); 164 165 if (state->crtcs[i].commit) { 166 kfree(state->crtcs[i].commit->event); 167 state->crtcs[i].commit->event = NULL; 168 drm_crtc_commit_put(state->crtcs[i].commit); 169 } 170 171 state->crtcs[i].commit = NULL; 172 state->crtcs[i].ptr = NULL; 173 state->crtcs[i].state = NULL; 174 } 175 176 for (i = 0; i < config->num_total_plane; i++) { 177 struct drm_plane *plane = state->planes[i].ptr; 178 179 if (!plane) 180 continue; 181 182 plane->funcs->atomic_destroy_state(plane, 183 state->planes[i].state); 184 state->planes[i].ptr = NULL; 185 state->planes[i].state = NULL; 186 } 187 } 188 EXPORT_SYMBOL(drm_atomic_state_default_clear); 189 190 /** 191 * drm_atomic_state_clear - clear state object 192 * @state: atomic state 193 * 194 * When the w/w mutex algorithm detects a deadlock we need to back off and drop 195 * all locks. So someone else could sneak in and change the current modeset 196 * configuration. Which means that all the state assembled in @state is no 197 * longer an atomic update to the current state, but to some arbitrary earlier 198 * state. Which could break assumptions the driver's 199 * &drm_mode_config_funcs.atomic_check likely relies on. 200 * 201 * Hence we must clear all cached state and completely start over, using this 202 * function. 203 */ 204 void drm_atomic_state_clear(struct drm_atomic_state *state) 205 { 206 struct drm_device *dev = state->dev; 207 struct drm_mode_config *config = &dev->mode_config; 208 209 if (config->funcs->atomic_state_clear) 210 config->funcs->atomic_state_clear(state); 211 else 212 drm_atomic_state_default_clear(state); 213 } 214 EXPORT_SYMBOL(drm_atomic_state_clear); 215 216 /** 217 * __drm_atomic_state_free - free all memory for an atomic state 218 * @ref: This atomic state to deallocate 219 * 220 * This frees all memory associated with an atomic state, including all the 221 * per-object state for planes, crtcs and connectors. 222 */ 223 void __drm_atomic_state_free(struct kref *ref) 224 { 225 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref); 226 struct drm_mode_config *config = &state->dev->mode_config; 227 228 drm_atomic_state_clear(state); 229 230 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state); 231 232 if (config->funcs->atomic_state_free) { 233 config->funcs->atomic_state_free(state); 234 } else { 235 drm_atomic_state_default_release(state); 236 kfree(state); 237 } 238 } 239 EXPORT_SYMBOL(__drm_atomic_state_free); 240 241 /** 242 * drm_atomic_get_crtc_state - get crtc state 243 * @state: global atomic state object 244 * @crtc: crtc to get state object for 245 * 246 * This function returns the crtc state for the given crtc, allocating it if 247 * needed. It will also grab the relevant crtc lock to make sure that the state 248 * is consistent. 249 * 250 * Returns: 251 * 252 * Either the allocated state or the error code encoded into the pointer. When 253 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the 254 * entire atomic sequence must be restarted. All other errors are fatal. 255 */ 256 struct drm_crtc_state * 257 drm_atomic_get_crtc_state(struct drm_atomic_state *state, 258 struct drm_crtc *crtc) 259 { 260 int ret, index = drm_crtc_index(crtc); 261 struct drm_crtc_state *crtc_state; 262 263 WARN_ON(!state->acquire_ctx); 264 265 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); 266 if (crtc_state) 267 return crtc_state; 268 269 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx); 270 if (ret) 271 return ERR_PTR(ret); 272 273 crtc_state = crtc->funcs->atomic_duplicate_state(crtc); 274 if (!crtc_state) 275 return ERR_PTR(-ENOMEM); 276 277 state->crtcs[index].state = crtc_state; 278 state->crtcs[index].old_state = crtc->state; 279 state->crtcs[index].new_state = crtc_state; 280 state->crtcs[index].ptr = crtc; 281 crtc_state->state = state; 282 283 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n", 284 crtc->base.id, crtc->name, crtc_state, state); 285 286 return crtc_state; 287 } 288 EXPORT_SYMBOL(drm_atomic_get_crtc_state); 289 290 static void set_out_fence_for_crtc(struct drm_atomic_state *state, 291 struct drm_crtc *crtc, s32 __user *fence_ptr) 292 { 293 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; 294 } 295 296 static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state, 297 struct drm_crtc *crtc) 298 { 299 s32 __user *fence_ptr; 300 301 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; 302 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; 303 304 return fence_ptr; 305 } 306 307 /** 308 * drm_atomic_set_mode_for_crtc - set mode for CRTC 309 * @state: the CRTC whose incoming state to update 310 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable 311 * 312 * Set a mode (originating from the kernel) on the desired CRTC state and update 313 * the enable property. 314 * 315 * RETURNS: 316 * Zero on success, error code on failure. Cannot return -EDEADLK. 317 */ 318 int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state, 319 struct drm_display_mode *mode) 320 { 321 struct drm_mode_modeinfo umode; 322 323 /* Early return for no change. */ 324 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0) 325 return 0; 326 327 drm_property_blob_put(state->mode_blob); 328 state->mode_blob = NULL; 329 330 if (mode) { 331 drm_mode_convert_to_umode(&umode, mode); 332 state->mode_blob = 333 drm_property_create_blob(state->crtc->dev, 334 sizeof(umode), 335 &umode); 336 if (IS_ERR(state->mode_blob)) 337 return PTR_ERR(state->mode_blob); 338 339 drm_mode_copy(&state->mode, mode); 340 state->enable = true; 341 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n", 342 mode->name, state); 343 } else { 344 memset(&state->mode, 0, sizeof(state->mode)); 345 state->enable = false; 346 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n", 347 state); 348 } 349 350 return 0; 351 } 352 EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc); 353 354 /** 355 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC 356 * @state: the CRTC whose incoming state to update 357 * @blob: pointer to blob property to use for mode 358 * 359 * Set a mode (originating from a blob property) on the desired CRTC state. 360 * This function will take a reference on the blob property for the CRTC state, 361 * and release the reference held on the state's existing mode property, if any 362 * was set. 363 * 364 * RETURNS: 365 * Zero on success, error code on failure. Cannot return -EDEADLK. 366 */ 367 int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, 368 struct drm_property_blob *blob) 369 { 370 if (blob == state->mode_blob) 371 return 0; 372 373 drm_property_blob_put(state->mode_blob); 374 state->mode_blob = NULL; 375 376 memset(&state->mode, 0, sizeof(state->mode)); 377 378 if (blob) { 379 if (blob->length != sizeof(struct drm_mode_modeinfo) || 380 drm_mode_convert_umode(&state->mode, 381 (const struct drm_mode_modeinfo *) 382 blob->data)) 383 return -EINVAL; 384 385 state->mode_blob = drm_property_blob_get(blob); 386 state->enable = true; 387 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n", 388 state->mode.name, state); 389 } else { 390 state->enable = false; 391 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n", 392 state); 393 } 394 395 return 0; 396 } 397 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); 398 399 /** 400 * drm_atomic_replace_property_blob - replace a blob property 401 * @blob: a pointer to the member blob to be replaced 402 * @new_blob: the new blob to replace with 403 * @replaced: whether the blob has been replaced 404 * 405 * RETURNS: 406 * Zero on success, error code on failure 407 */ 408 static void 409 drm_atomic_replace_property_blob(struct drm_property_blob **blob, 410 struct drm_property_blob *new_blob, 411 bool *replaced) 412 { 413 struct drm_property_blob *old_blob = *blob; 414 415 if (old_blob == new_blob) 416 return; 417 418 drm_property_blob_put(old_blob); 419 if (new_blob) 420 drm_property_blob_get(new_blob); 421 *blob = new_blob; 422 *replaced = true; 423 424 return; 425 } 426 427 static int 428 drm_atomic_replace_property_blob_from_id(struct drm_crtc *crtc, 429 struct drm_property_blob **blob, 430 uint64_t blob_id, 431 ssize_t expected_size, 432 bool *replaced) 433 { 434 struct drm_property_blob *new_blob = NULL; 435 436 if (blob_id != 0) { 437 new_blob = drm_property_lookup_blob(crtc->dev, blob_id); 438 if (new_blob == NULL) 439 return -EINVAL; 440 441 if (expected_size > 0 && expected_size != new_blob->length) { 442 drm_property_blob_put(new_blob); 443 return -EINVAL; 444 } 445 } 446 447 drm_atomic_replace_property_blob(blob, new_blob, replaced); 448 drm_property_blob_put(new_blob); 449 450 return 0; 451 } 452 453 /** 454 * drm_atomic_crtc_set_property - set property on CRTC 455 * @crtc: the drm CRTC to set a property on 456 * @state: the state object to update with the new property value 457 * @property: the property to set 458 * @val: the new property value 459 * 460 * This function handles generic/core properties and calls out to driver's 461 * &drm_crtc_funcs.atomic_set_property for driver properties. To ensure 462 * consistent behavior you must call this function rather than the driver hook 463 * directly. 464 * 465 * RETURNS: 466 * Zero on success, error code on failure 467 */ 468 int drm_atomic_crtc_set_property(struct drm_crtc *crtc, 469 struct drm_crtc_state *state, struct drm_property *property, 470 uint64_t val) 471 { 472 struct drm_device *dev = crtc->dev; 473 struct drm_mode_config *config = &dev->mode_config; 474 bool replaced = false; 475 int ret; 476 477 if (property == config->prop_active) 478 state->active = val; 479 else if (property == config->prop_mode_id) { 480 struct drm_property_blob *mode = 481 drm_property_lookup_blob(dev, val); 482 ret = drm_atomic_set_mode_prop_for_crtc(state, mode); 483 drm_property_blob_put(mode); 484 return ret; 485 } else if (property == config->degamma_lut_property) { 486 ret = drm_atomic_replace_property_blob_from_id(crtc, 487 &state->degamma_lut, 488 val, 489 -1, 490 &replaced); 491 state->color_mgmt_changed |= replaced; 492 return ret; 493 } else if (property == config->ctm_property) { 494 ret = drm_atomic_replace_property_blob_from_id(crtc, 495 &state->ctm, 496 val, 497 sizeof(struct drm_color_ctm), 498 &replaced); 499 state->color_mgmt_changed |= replaced; 500 return ret; 501 } else if (property == config->gamma_lut_property) { 502 ret = drm_atomic_replace_property_blob_from_id(crtc, 503 &state->gamma_lut, 504 val, 505 -1, 506 &replaced); 507 state->color_mgmt_changed |= replaced; 508 return ret; 509 } else if (property == config->prop_out_fence_ptr) { 510 s32 __user *fence_ptr = u64_to_user_ptr(val); 511 512 if (!fence_ptr) 513 return 0; 514 515 if (put_user(-1, fence_ptr)) 516 return -EFAULT; 517 518 set_out_fence_for_crtc(state->state, crtc, fence_ptr); 519 } else if (crtc->funcs->atomic_set_property) 520 return crtc->funcs->atomic_set_property(crtc, state, property, val); 521 else 522 return -EINVAL; 523 524 return 0; 525 } 526 EXPORT_SYMBOL(drm_atomic_crtc_set_property); 527 528 /** 529 * drm_atomic_crtc_get_property - get property value from CRTC state 530 * @crtc: the drm CRTC to set a property on 531 * @state: the state object to get the property value from 532 * @property: the property to set 533 * @val: return location for the property value 534 * 535 * This function handles generic/core properties and calls out to driver's 536 * &drm_crtc_funcs.atomic_get_property for driver properties. To ensure 537 * consistent behavior you must call this function rather than the driver hook 538 * directly. 539 * 540 * RETURNS: 541 * Zero on success, error code on failure 542 */ 543 static int 544 drm_atomic_crtc_get_property(struct drm_crtc *crtc, 545 const struct drm_crtc_state *state, 546 struct drm_property *property, uint64_t *val) 547 { 548 struct drm_device *dev = crtc->dev; 549 struct drm_mode_config *config = &dev->mode_config; 550 551 if (property == config->prop_active) 552 *val = state->active; 553 else if (property == config->prop_mode_id) 554 *val = (state->mode_blob) ? state->mode_blob->base.id : 0; 555 else if (property == config->degamma_lut_property) 556 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; 557 else if (property == config->ctm_property) 558 *val = (state->ctm) ? state->ctm->base.id : 0; 559 else if (property == config->gamma_lut_property) 560 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; 561 else if (property == config->prop_out_fence_ptr) 562 *val = 0; 563 else if (crtc->funcs->atomic_get_property) 564 return crtc->funcs->atomic_get_property(crtc, state, property, val); 565 else 566 return -EINVAL; 567 568 return 0; 569 } 570 571 /** 572 * drm_atomic_crtc_check - check crtc state 573 * @crtc: crtc to check 574 * @state: crtc state to check 575 * 576 * Provides core sanity checks for crtc state. 577 * 578 * RETURNS: 579 * Zero on success, error code on failure 580 */ 581 static int drm_atomic_crtc_check(struct drm_crtc *crtc, 582 struct drm_crtc_state *state) 583 { 584 /* NOTE: we explicitly don't enforce constraints such as primary 585 * layer covering entire screen, since that is something we want 586 * to allow (on hw that supports it). For hw that does not, it 587 * should be checked in driver's crtc->atomic_check() vfunc. 588 * 589 * TODO: Add generic modeset state checks once we support those. 590 */ 591 592 if (state->active && !state->enable) { 593 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n", 594 crtc->base.id, crtc->name); 595 return -EINVAL; 596 } 597 598 /* The state->enable vs. state->mode_blob checks can be WARN_ON, 599 * as this is a kernel-internal detail that userspace should never 600 * be able to trigger. */ 601 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && 602 WARN_ON(state->enable && !state->mode_blob)) { 603 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n", 604 crtc->base.id, crtc->name); 605 return -EINVAL; 606 } 607 608 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && 609 WARN_ON(!state->enable && state->mode_blob)) { 610 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n", 611 crtc->base.id, crtc->name); 612 return -EINVAL; 613 } 614 615 /* 616 * Reject event generation for when a CRTC is off and stays off. 617 * It wouldn't be hard to implement this, but userspace has a track 618 * record of happily burning through 100% cpu (or worse, crash) when the 619 * display pipe is suspended. To avoid all that fun just reject updates 620 * that ask for events since likely that indicates a bug in the 621 * compositor's drawing loop. This is consistent with the vblank IOCTL 622 * and legacy page_flip IOCTL which also reject service on a disabled 623 * pipe. 624 */ 625 if (state->event && !state->active && !crtc->state->active) { 626 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n", 627 crtc->base.id, crtc->name); 628 return -EINVAL; 629 } 630 631 return 0; 632 } 633 634 static void drm_atomic_crtc_print_state(struct drm_printer *p, 635 const struct drm_crtc_state *state) 636 { 637 struct drm_crtc *crtc = state->crtc; 638 639 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name); 640 drm_printf(p, "\tenable=%d\n", state->enable); 641 drm_printf(p, "\tactive=%d\n", state->active); 642 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed); 643 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed); 644 drm_printf(p, "\tactive_changed=%d\n", state->active_changed); 645 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed); 646 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed); 647 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask); 648 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask); 649 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask); 650 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode)); 651 652 if (crtc->funcs->atomic_print_state) 653 crtc->funcs->atomic_print_state(p, state); 654 } 655 656 /** 657 * drm_atomic_get_plane_state - get plane state 658 * @state: global atomic state object 659 * @plane: plane to get state object for 660 * 661 * This function returns the plane state for the given plane, allocating it if 662 * needed. It will also grab the relevant plane lock to make sure that the state 663 * is consistent. 664 * 665 * Returns: 666 * 667 * Either the allocated state or the error code encoded into the pointer. When 668 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the 669 * entire atomic sequence must be restarted. All other errors are fatal. 670 */ 671 struct drm_plane_state * 672 drm_atomic_get_plane_state(struct drm_atomic_state *state, 673 struct drm_plane *plane) 674 { 675 int ret, index = drm_plane_index(plane); 676 struct drm_plane_state *plane_state; 677 678 WARN_ON(!state->acquire_ctx); 679 680 plane_state = drm_atomic_get_existing_plane_state(state, plane); 681 if (plane_state) 682 return plane_state; 683 684 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx); 685 if (ret) 686 return ERR_PTR(ret); 687 688 plane_state = plane->funcs->atomic_duplicate_state(plane); 689 if (!plane_state) 690 return ERR_PTR(-ENOMEM); 691 692 state->planes[index].state = plane_state; 693 state->planes[index].ptr = plane; 694 state->planes[index].old_state = plane->state; 695 state->planes[index].new_state = plane_state; 696 plane_state->state = state; 697 698 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n", 699 plane->base.id, plane->name, plane_state, state); 700 701 if (plane_state->crtc) { 702 struct drm_crtc_state *crtc_state; 703 704 crtc_state = drm_atomic_get_crtc_state(state, 705 plane_state->crtc); 706 if (IS_ERR(crtc_state)) 707 return ERR_CAST(crtc_state); 708 } 709 710 return plane_state; 711 } 712 EXPORT_SYMBOL(drm_atomic_get_plane_state); 713 714 /** 715 * drm_atomic_plane_set_property - set property on plane 716 * @plane: the drm plane to set a property on 717 * @state: the state object to update with the new property value 718 * @property: the property to set 719 * @val: the new property value 720 * 721 * This function handles generic/core properties and calls out to driver's 722 * &drm_plane_funcs.atomic_set_property for driver properties. To ensure 723 * consistent behavior you must call this function rather than the driver hook 724 * directly. 725 * 726 * RETURNS: 727 * Zero on success, error code on failure 728 */ 729 int drm_atomic_plane_set_property(struct drm_plane *plane, 730 struct drm_plane_state *state, struct drm_property *property, 731 uint64_t val) 732 { 733 struct drm_device *dev = plane->dev; 734 struct drm_mode_config *config = &dev->mode_config; 735 736 if (property == config->prop_fb_id) { 737 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, val); 738 drm_atomic_set_fb_for_plane(state, fb); 739 if (fb) 740 drm_framebuffer_put(fb); 741 } else if (property == config->prop_in_fence_fd) { 742 if (state->fence) 743 return -EINVAL; 744 745 if (U642I64(val) == -1) 746 return 0; 747 748 state->fence = sync_file_get_fence(val); 749 if (!state->fence) 750 return -EINVAL; 751 752 } else if (property == config->prop_crtc_id) { 753 struct drm_crtc *crtc = drm_crtc_find(dev, val); 754 return drm_atomic_set_crtc_for_plane(state, crtc); 755 } else if (property == config->prop_crtc_x) { 756 state->crtc_x = U642I64(val); 757 } else if (property == config->prop_crtc_y) { 758 state->crtc_y = U642I64(val); 759 } else if (property == config->prop_crtc_w) { 760 state->crtc_w = val; 761 } else if (property == config->prop_crtc_h) { 762 state->crtc_h = val; 763 } else if (property == config->prop_src_x) { 764 state->src_x = val; 765 } else if (property == config->prop_src_y) { 766 state->src_y = val; 767 } else if (property == config->prop_src_w) { 768 state->src_w = val; 769 } else if (property == config->prop_src_h) { 770 state->src_h = val; 771 } else if (property == plane->rotation_property) { 772 if (!is_power_of_2(val & DRM_ROTATE_MASK)) 773 return -EINVAL; 774 state->rotation = val; 775 } else if (property == plane->zpos_property) { 776 state->zpos = val; 777 } else if (plane->funcs->atomic_set_property) { 778 return plane->funcs->atomic_set_property(plane, state, 779 property, val); 780 } else { 781 return -EINVAL; 782 } 783 784 return 0; 785 } 786 EXPORT_SYMBOL(drm_atomic_plane_set_property); 787 788 /** 789 * drm_atomic_plane_get_property - get property value from plane state 790 * @plane: the drm plane to set a property on 791 * @state: the state object to get the property value from 792 * @property: the property to set 793 * @val: return location for the property value 794 * 795 * This function handles generic/core properties and calls out to driver's 796 * &drm_plane_funcs.atomic_get_property for driver properties. To ensure 797 * consistent behavior you must call this function rather than the driver hook 798 * directly. 799 * 800 * RETURNS: 801 * Zero on success, error code on failure 802 */ 803 static int 804 drm_atomic_plane_get_property(struct drm_plane *plane, 805 const struct drm_plane_state *state, 806 struct drm_property *property, uint64_t *val) 807 { 808 struct drm_device *dev = plane->dev; 809 struct drm_mode_config *config = &dev->mode_config; 810 811 if (property == config->prop_fb_id) { 812 *val = (state->fb) ? state->fb->base.id : 0; 813 } else if (property == config->prop_in_fence_fd) { 814 *val = -1; 815 } else if (property == config->prop_crtc_id) { 816 *val = (state->crtc) ? state->crtc->base.id : 0; 817 } else if (property == config->prop_crtc_x) { 818 *val = I642U64(state->crtc_x); 819 } else if (property == config->prop_crtc_y) { 820 *val = I642U64(state->crtc_y); 821 } else if (property == config->prop_crtc_w) { 822 *val = state->crtc_w; 823 } else if (property == config->prop_crtc_h) { 824 *val = state->crtc_h; 825 } else if (property == config->prop_src_x) { 826 *val = state->src_x; 827 } else if (property == config->prop_src_y) { 828 *val = state->src_y; 829 } else if (property == config->prop_src_w) { 830 *val = state->src_w; 831 } else if (property == config->prop_src_h) { 832 *val = state->src_h; 833 } else if (property == plane->rotation_property) { 834 *val = state->rotation; 835 } else if (property == plane->zpos_property) { 836 *val = state->zpos; 837 } else if (plane->funcs->atomic_get_property) { 838 return plane->funcs->atomic_get_property(plane, state, property, val); 839 } else { 840 return -EINVAL; 841 } 842 843 return 0; 844 } 845 846 static bool 847 plane_switching_crtc(struct drm_atomic_state *state, 848 struct drm_plane *plane, 849 struct drm_plane_state *plane_state) 850 { 851 if (!plane->state->crtc || !plane_state->crtc) 852 return false; 853 854 if (plane->state->crtc == plane_state->crtc) 855 return false; 856 857 /* This could be refined, but currently there's no helper or driver code 858 * to implement direct switching of active planes nor userspace to take 859 * advantage of more direct plane switching without the intermediate 860 * full OFF state. 861 */ 862 return true; 863 } 864 865 /** 866 * drm_atomic_plane_check - check plane state 867 * @plane: plane to check 868 * @state: plane state to check 869 * 870 * Provides core sanity checks for plane state. 871 * 872 * RETURNS: 873 * Zero on success, error code on failure 874 */ 875 static int drm_atomic_plane_check(struct drm_plane *plane, 876 struct drm_plane_state *state) 877 { 878 unsigned int fb_width, fb_height; 879 int ret; 880 881 /* either *both* CRTC and FB must be set, or neither */ 882 if (WARN_ON(state->crtc && !state->fb)) { 883 DRM_DEBUG_ATOMIC("CRTC set but no FB\n"); 884 return -EINVAL; 885 } else if (WARN_ON(state->fb && !state->crtc)) { 886 DRM_DEBUG_ATOMIC("FB set but no CRTC\n"); 887 return -EINVAL; 888 } 889 890 /* if disabled, we don't care about the rest of the state: */ 891 if (!state->crtc) 892 return 0; 893 894 /* Check whether this plane is usable on this CRTC */ 895 if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) { 896 DRM_DEBUG_ATOMIC("Invalid crtc for plane\n"); 897 return -EINVAL; 898 } 899 900 /* Check whether this plane supports the fb pixel format. */ 901 ret = drm_plane_check_pixel_format(plane, state->fb->format->format); 902 if (ret) { 903 struct drm_format_name_buf format_name; 904 DRM_DEBUG_ATOMIC("Invalid pixel format %s\n", 905 drm_get_format_name(state->fb->format->format, 906 &format_name)); 907 return ret; 908 } 909 910 /* Give drivers some help against integer overflows */ 911 if (state->crtc_w > INT_MAX || 912 state->crtc_x > INT_MAX - (int32_t) state->crtc_w || 913 state->crtc_h > INT_MAX || 914 state->crtc_y > INT_MAX - (int32_t) state->crtc_h) { 915 DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n", 916 state->crtc_w, state->crtc_h, 917 state->crtc_x, state->crtc_y); 918 return -ERANGE; 919 } 920 921 fb_width = state->fb->width << 16; 922 fb_height = state->fb->height << 16; 923 924 /* Make sure source coordinates are inside the fb. */ 925 if (state->src_w > fb_width || 926 state->src_x > fb_width - state->src_w || 927 state->src_h > fb_height || 928 state->src_y > fb_height - state->src_h) { 929 DRM_DEBUG_ATOMIC("Invalid source coordinates " 930 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 931 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10, 932 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10, 933 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10, 934 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10); 935 return -ENOSPC; 936 } 937 938 if (plane_switching_crtc(state->state, plane, state)) { 939 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n", 940 plane->base.id, plane->name); 941 return -EINVAL; 942 } 943 944 return 0; 945 } 946 947 static void drm_atomic_plane_print_state(struct drm_printer *p, 948 const struct drm_plane_state *state) 949 { 950 struct drm_plane *plane = state->plane; 951 struct drm_rect src = drm_plane_state_src(state); 952 struct drm_rect dest = drm_plane_state_dest(state); 953 954 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name); 955 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); 956 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0); 957 if (state->fb) { 958 struct drm_framebuffer *fb = state->fb; 959 int i, n = fb->format->num_planes; 960 struct drm_format_name_buf format_name; 961 962 drm_printf(p, "\t\tformat=%s\n", 963 drm_get_format_name(fb->format->format, &format_name)); 964 drm_printf(p, "\t\t\tmodifier=0x%lx\n", fb->modifier); 965 drm_printf(p, "\t\tsize=%dx%d\n", fb->width, fb->height); 966 drm_printf(p, "\t\tlayers:\n"); 967 for (i = 0; i < n; i++) { 968 drm_printf(p, "\t\t\tpitch[%d]=%u\n", i, fb->pitches[i]); 969 drm_printf(p, "\t\t\toffset[%d]=%u\n", i, fb->offsets[i]); 970 } 971 } 972 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest)); 973 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src)); 974 drm_printf(p, "\trotation=%x\n", state->rotation); 975 976 if (plane->funcs->atomic_print_state) 977 plane->funcs->atomic_print_state(p, state); 978 } 979 980 /** 981 * drm_atomic_get_connector_state - get connector state 982 * @state: global atomic state object 983 * @connector: connector to get state object for 984 * 985 * This function returns the connector state for the given connector, 986 * allocating it if needed. It will also grab the relevant connector lock to 987 * make sure that the state is consistent. 988 * 989 * Returns: 990 * 991 * Either the allocated state or the error code encoded into the pointer. When 992 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the 993 * entire atomic sequence must be restarted. All other errors are fatal. 994 */ 995 struct drm_connector_state * 996 drm_atomic_get_connector_state(struct drm_atomic_state *state, 997 struct drm_connector *connector) 998 { 999 int ret, index; 1000 struct drm_mode_config *config = &connector->dev->mode_config; 1001 struct drm_connector_state *connector_state; 1002 1003 WARN_ON(!state->acquire_ctx); 1004 1005 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); 1006 if (ret) 1007 return ERR_PTR(ret); 1008 1009 index = drm_connector_index(connector); 1010 1011 if (index >= state->num_connector) { 1012 struct __drm_connnectors_state *c; 1013 int alloc = max(index + 1, config->num_connector); 1014 1015 c = krealloc(state->connectors, 1016 alloc * sizeof(*state->connectors), M_DRM, 1017 GFP_KERNEL); 1018 if (!c) 1019 return ERR_PTR(-ENOMEM); 1020 1021 state->connectors = c; 1022 memset(&state->connectors[state->num_connector], 0, 1023 sizeof(*state->connectors) * (alloc - state->num_connector)); 1024 1025 state->num_connector = alloc; 1026 } 1027 1028 if (state->connectors[index].state) 1029 return state->connectors[index].state; 1030 1031 connector_state = connector->funcs->atomic_duplicate_state(connector); 1032 if (!connector_state) 1033 return ERR_PTR(-ENOMEM); 1034 1035 drm_connector_get(connector); 1036 state->connectors[index].state = connector_state; 1037 state->connectors[index].old_state = connector->state; 1038 state->connectors[index].new_state = connector_state; 1039 state->connectors[index].ptr = connector; 1040 connector_state->state = state; 1041 1042 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n", 1043 connector->base.id, connector->name, 1044 connector_state, state); 1045 1046 if (connector_state->crtc) { 1047 struct drm_crtc_state *crtc_state; 1048 1049 crtc_state = drm_atomic_get_crtc_state(state, 1050 connector_state->crtc); 1051 if (IS_ERR(crtc_state)) 1052 return ERR_CAST(crtc_state); 1053 } 1054 1055 return connector_state; 1056 } 1057 EXPORT_SYMBOL(drm_atomic_get_connector_state); 1058 1059 /** 1060 * drm_atomic_connector_set_property - set property on connector. 1061 * @connector: the drm connector to set a property on 1062 * @state: the state object to update with the new property value 1063 * @property: the property to set 1064 * @val: the new property value 1065 * 1066 * This function handles generic/core properties and calls out to driver's 1067 * &drm_connector_funcs.atomic_set_property for driver properties. To ensure 1068 * consistent behavior you must call this function rather than the driver hook 1069 * directly. 1070 * 1071 * RETURNS: 1072 * Zero on success, error code on failure 1073 */ 1074 int drm_atomic_connector_set_property(struct drm_connector *connector, 1075 struct drm_connector_state *state, struct drm_property *property, 1076 uint64_t val) 1077 { 1078 struct drm_device *dev = connector->dev; 1079 struct drm_mode_config *config = &dev->mode_config; 1080 1081 if (property == config->prop_crtc_id) { 1082 struct drm_crtc *crtc = drm_crtc_find(dev, val); 1083 return drm_atomic_set_crtc_for_connector(state, crtc); 1084 } else if (property == config->dpms_property) { 1085 /* setting DPMS property requires special handling, which 1086 * is done in legacy setprop path for us. Disallow (for 1087 * now?) atomic writes to DPMS property: 1088 */ 1089 return -EINVAL; 1090 } else if (property == config->tv_select_subconnector_property) { 1091 state->tv.subconnector = val; 1092 } else if (property == config->tv_left_margin_property) { 1093 state->tv.margins.left = val; 1094 } else if (property == config->tv_right_margin_property) { 1095 state->tv.margins.right = val; 1096 } else if (property == config->tv_top_margin_property) { 1097 state->tv.margins.top = val; 1098 } else if (property == config->tv_bottom_margin_property) { 1099 state->tv.margins.bottom = val; 1100 } else if (property == config->tv_mode_property) { 1101 state->tv.mode = val; 1102 } else if (property == config->tv_brightness_property) { 1103 state->tv.brightness = val; 1104 } else if (property == config->tv_contrast_property) { 1105 state->tv.contrast = val; 1106 } else if (property == config->tv_flicker_reduction_property) { 1107 state->tv.flicker_reduction = val; 1108 } else if (property == config->tv_overscan_property) { 1109 state->tv.overscan = val; 1110 } else if (property == config->tv_saturation_property) { 1111 state->tv.saturation = val; 1112 } else if (property == config->tv_hue_property) { 1113 state->tv.hue = val; 1114 } else if (property == config->link_status_property) { 1115 /* Never downgrade from GOOD to BAD on userspace's request here, 1116 * only hw issues can do that. 1117 * 1118 * For an atomic property the userspace doesn't need to be able 1119 * to understand all the properties, but needs to be able to 1120 * restore the state it wants on VT switch. So if the userspace 1121 * tries to change the link_status from GOOD to BAD, driver 1122 * silently rejects it and returns a 0. This prevents userspace 1123 * from accidently breaking the display when it restores the 1124 * state. 1125 */ 1126 if (state->link_status != DRM_LINK_STATUS_GOOD) 1127 state->link_status = val; 1128 } else if (connector->funcs->atomic_set_property) { 1129 return connector->funcs->atomic_set_property(connector, 1130 state, property, val); 1131 } else { 1132 return -EINVAL; 1133 } 1134 1135 return 0; 1136 } 1137 EXPORT_SYMBOL(drm_atomic_connector_set_property); 1138 1139 static void drm_atomic_connector_print_state(struct drm_printer *p, 1140 const struct drm_connector_state *state) 1141 { 1142 struct drm_connector *connector = state->connector; 1143 1144 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name); 1145 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); 1146 1147 if (connector->funcs->atomic_print_state) 1148 connector->funcs->atomic_print_state(p, state); 1149 } 1150 1151 /** 1152 * drm_atomic_connector_get_property - get property value from connector state 1153 * @connector: the drm connector to set a property on 1154 * @state: the state object to get the property value from 1155 * @property: the property to set 1156 * @val: return location for the property value 1157 * 1158 * This function handles generic/core properties and calls out to driver's 1159 * &drm_connector_funcs.atomic_get_property for driver properties. To ensure 1160 * consistent behavior you must call this function rather than the driver hook 1161 * directly. 1162 * 1163 * RETURNS: 1164 * Zero on success, error code on failure 1165 */ 1166 static int 1167 drm_atomic_connector_get_property(struct drm_connector *connector, 1168 const struct drm_connector_state *state, 1169 struct drm_property *property, uint64_t *val) 1170 { 1171 struct drm_device *dev = connector->dev; 1172 struct drm_mode_config *config = &dev->mode_config; 1173 1174 if (property == config->prop_crtc_id) { 1175 *val = (state->crtc) ? state->crtc->base.id : 0; 1176 } else if (property == config->dpms_property) { 1177 *val = connector->dpms; 1178 } else if (property == config->tv_select_subconnector_property) { 1179 *val = state->tv.subconnector; 1180 } else if (property == config->tv_left_margin_property) { 1181 *val = state->tv.margins.left; 1182 } else if (property == config->tv_right_margin_property) { 1183 *val = state->tv.margins.right; 1184 } else if (property == config->tv_top_margin_property) { 1185 *val = state->tv.margins.top; 1186 } else if (property == config->tv_bottom_margin_property) { 1187 *val = state->tv.margins.bottom; 1188 } else if (property == config->tv_mode_property) { 1189 *val = state->tv.mode; 1190 } else if (property == config->tv_brightness_property) { 1191 *val = state->tv.brightness; 1192 } else if (property == config->tv_contrast_property) { 1193 *val = state->tv.contrast; 1194 } else if (property == config->tv_flicker_reduction_property) { 1195 *val = state->tv.flicker_reduction; 1196 } else if (property == config->tv_overscan_property) { 1197 *val = state->tv.overscan; 1198 } else if (property == config->tv_saturation_property) { 1199 *val = state->tv.saturation; 1200 } else if (property == config->tv_hue_property) { 1201 *val = state->tv.hue; 1202 } else if (property == config->link_status_property) { 1203 *val = state->link_status; 1204 } else if (connector->funcs->atomic_get_property) { 1205 return connector->funcs->atomic_get_property(connector, 1206 state, property, val); 1207 } else { 1208 return -EINVAL; 1209 } 1210 1211 return 0; 1212 } 1213 1214 int drm_atomic_get_property(struct drm_mode_object *obj, 1215 struct drm_property *property, uint64_t *val) 1216 { 1217 struct drm_device *dev = property->dev; 1218 int ret; 1219 1220 switch (obj->type) { 1221 case DRM_MODE_OBJECT_CONNECTOR: { 1222 struct drm_connector *connector = obj_to_connector(obj); 1223 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 1224 ret = drm_atomic_connector_get_property(connector, 1225 connector->state, property, val); 1226 break; 1227 } 1228 case DRM_MODE_OBJECT_CRTC: { 1229 struct drm_crtc *crtc = obj_to_crtc(obj); 1230 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 1231 ret = drm_atomic_crtc_get_property(crtc, 1232 crtc->state, property, val); 1233 break; 1234 } 1235 case DRM_MODE_OBJECT_PLANE: { 1236 struct drm_plane *plane = obj_to_plane(obj); 1237 WARN_ON(!drm_modeset_is_locked(&plane->mutex)); 1238 ret = drm_atomic_plane_get_property(plane, 1239 plane->state, property, val); 1240 break; 1241 } 1242 default: 1243 ret = -EINVAL; 1244 break; 1245 } 1246 1247 return ret; 1248 } 1249 1250 /** 1251 * drm_atomic_set_crtc_for_plane - set crtc for plane 1252 * @plane_state: the plane whose incoming state to update 1253 * @crtc: crtc to use for the plane 1254 * 1255 * Changing the assigned crtc for a plane requires us to grab the lock and state 1256 * for the new crtc, as needed. This function takes care of all these details 1257 * besides updating the pointer in the state object itself. 1258 * 1259 * Returns: 1260 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 1261 * then the w/w mutex code has detected a deadlock and the entire atomic 1262 * sequence must be restarted. All other errors are fatal. 1263 */ 1264 int 1265 drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, 1266 struct drm_crtc *crtc) 1267 { 1268 struct drm_plane *plane = plane_state->plane; 1269 struct drm_crtc_state *crtc_state; 1270 1271 if (plane_state->crtc) { 1272 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 1273 plane_state->crtc); 1274 if (WARN_ON(IS_ERR(crtc_state))) 1275 return PTR_ERR(crtc_state); 1276 1277 crtc_state->plane_mask &= ~(1 << drm_plane_index(plane)); 1278 } 1279 1280 plane_state->crtc = crtc; 1281 1282 if (crtc) { 1283 crtc_state = drm_atomic_get_crtc_state(plane_state->state, 1284 crtc); 1285 if (IS_ERR(crtc_state)) 1286 return PTR_ERR(crtc_state); 1287 crtc_state->plane_mask |= (1 << drm_plane_index(plane)); 1288 } 1289 1290 if (crtc) 1291 DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d:%s]\n", 1292 plane_state, crtc->base.id, crtc->name); 1293 else 1294 DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n", 1295 plane_state); 1296 1297 return 0; 1298 } 1299 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane); 1300 1301 /** 1302 * drm_atomic_set_fb_for_plane - set framebuffer for plane 1303 * @plane_state: atomic state object for the plane 1304 * @fb: fb to use for the plane 1305 * 1306 * Changing the assigned framebuffer for a plane requires us to grab a reference 1307 * to the new fb and drop the reference to the old fb, if there is one. This 1308 * function takes care of all these details besides updating the pointer in the 1309 * state object itself. 1310 */ 1311 void 1312 drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, 1313 struct drm_framebuffer *fb) 1314 { 1315 if (fb) 1316 DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n", 1317 fb->base.id, plane_state); 1318 else 1319 DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n", 1320 plane_state); 1321 1322 drm_framebuffer_assign(&plane_state->fb, fb); 1323 } 1324 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); 1325 1326 /** 1327 * drm_atomic_set_fence_for_plane - set fence for plane 1328 * @plane_state: atomic state object for the plane 1329 * @fence: dma_fence to use for the plane 1330 * 1331 * Helper to setup the plane_state fence in case it is not set yet. 1332 * By using this drivers doesn't need to worry if the user choose 1333 * implicit or explicit fencing. 1334 * 1335 * This function will not set the fence to the state if it was set 1336 * via explicit fencing interfaces on the atomic ioctl. In that case it will 1337 * drop the reference to the fence as we are not storing it anywhere. 1338 * Otherwise, if &drm_plane_state.fence is not set this function we just set it 1339 * with the received implicit fence. In both cases this function consumes a 1340 * reference for @fence. 1341 */ 1342 void 1343 drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state, 1344 struct dma_fence *fence) 1345 { 1346 if (plane_state->fence) { 1347 dma_fence_put(fence); 1348 return; 1349 } 1350 1351 plane_state->fence = fence; 1352 } 1353 EXPORT_SYMBOL(drm_atomic_set_fence_for_plane); 1354 1355 /** 1356 * drm_atomic_set_crtc_for_connector - set crtc for connector 1357 * @conn_state: atomic state object for the connector 1358 * @crtc: crtc to use for the connector 1359 * 1360 * Changing the assigned crtc for a connector requires us to grab the lock and 1361 * state for the new crtc, as needed. This function takes care of all these 1362 * details besides updating the pointer in the state object itself. 1363 * 1364 * Returns: 1365 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 1366 * then the w/w mutex code has detected a deadlock and the entire atomic 1367 * sequence must be restarted. All other errors are fatal. 1368 */ 1369 int 1370 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, 1371 struct drm_crtc *crtc) 1372 { 1373 struct drm_crtc_state *crtc_state; 1374 1375 if (conn_state->crtc == crtc) 1376 return 0; 1377 1378 if (conn_state->crtc) { 1379 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state, 1380 conn_state->crtc); 1381 1382 crtc_state->connector_mask &= 1383 ~(1 << drm_connector_index(conn_state->connector)); 1384 1385 drm_connector_put(conn_state->connector); 1386 conn_state->crtc = NULL; 1387 } 1388 1389 if (crtc) { 1390 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); 1391 if (IS_ERR(crtc_state)) 1392 return PTR_ERR(crtc_state); 1393 1394 crtc_state->connector_mask |= 1395 1 << drm_connector_index(conn_state->connector); 1396 1397 drm_connector_get(conn_state->connector); 1398 conn_state->crtc = crtc; 1399 1400 DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n", 1401 conn_state, crtc->base.id, crtc->name); 1402 } else { 1403 DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n", 1404 conn_state); 1405 } 1406 1407 return 0; 1408 } 1409 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); 1410 1411 /** 1412 * drm_atomic_add_affected_connectors - add connectors for crtc 1413 * @state: atomic state 1414 * @crtc: DRM crtc 1415 * 1416 * This function walks the current configuration and adds all connectors 1417 * currently using @crtc to the atomic configuration @state. Note that this 1418 * function must acquire the connection mutex. This can potentially cause 1419 * unneeded seralization if the update is just for the planes on one crtc. Hence 1420 * drivers and helpers should only call this when really needed (e.g. when a 1421 * full modeset needs to happen due to some change). 1422 * 1423 * Returns: 1424 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 1425 * then the w/w mutex code has detected a deadlock and the entire atomic 1426 * sequence must be restarted. All other errors are fatal. 1427 */ 1428 int 1429 drm_atomic_add_affected_connectors(struct drm_atomic_state *state, 1430 struct drm_crtc *crtc) 1431 { 1432 struct drm_mode_config *config = &state->dev->mode_config; 1433 struct drm_connector *connector; 1434 struct drm_connector_state *conn_state; 1435 struct drm_connector_list_iter conn_iter; 1436 struct drm_crtc_state *crtc_state; 1437 int ret; 1438 1439 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1440 if (IS_ERR(crtc_state)) 1441 return PTR_ERR(crtc_state); 1442 1443 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); 1444 if (ret) 1445 return ret; 1446 1447 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n", 1448 crtc->base.id, crtc->name, state); 1449 1450 /* 1451 * Changed connectors are already in @state, so only need to look 1452 * at the connector_mask in crtc_state. 1453 */ 1454 drm_connector_list_iter_begin(state->dev, &conn_iter); 1455 drm_for_each_connector_iter(connector, &conn_iter) { 1456 if (!(crtc_state->connector_mask & (1 << drm_connector_index(connector)))) 1457 continue; 1458 1459 conn_state = drm_atomic_get_connector_state(state, connector); 1460 if (IS_ERR(conn_state)) { 1461 drm_connector_list_iter_end(&conn_iter); 1462 return PTR_ERR(conn_state); 1463 } 1464 } 1465 drm_connector_list_iter_end(&conn_iter); 1466 1467 return 0; 1468 } 1469 EXPORT_SYMBOL(drm_atomic_add_affected_connectors); 1470 1471 /** 1472 * drm_atomic_add_affected_planes - add planes for crtc 1473 * @state: atomic state 1474 * @crtc: DRM crtc 1475 * 1476 * This function walks the current configuration and adds all planes 1477 * currently used by @crtc to the atomic configuration @state. This is useful 1478 * when an atomic commit also needs to check all currently enabled plane on 1479 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC 1480 * to avoid special code to force-enable all planes. 1481 * 1482 * Since acquiring a plane state will always also acquire the w/w mutex of the 1483 * current CRTC for that plane (if there is any) adding all the plane states for 1484 * a CRTC will not reduce parallism of atomic updates. 1485 * 1486 * Returns: 1487 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK 1488 * then the w/w mutex code has detected a deadlock and the entire atomic 1489 * sequence must be restarted. All other errors are fatal. 1490 */ 1491 int 1492 drm_atomic_add_affected_planes(struct drm_atomic_state *state, 1493 struct drm_crtc *crtc) 1494 { 1495 struct drm_plane *plane; 1496 1497 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc)); 1498 1499 drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) { 1500 struct drm_plane_state *plane_state = 1501 drm_atomic_get_plane_state(state, plane); 1502 1503 if (IS_ERR(plane_state)) 1504 return PTR_ERR(plane_state); 1505 } 1506 return 0; 1507 } 1508 EXPORT_SYMBOL(drm_atomic_add_affected_planes); 1509 1510 /** 1511 * drm_atomic_legacy_backoff - locking backoff for legacy ioctls 1512 * @state: atomic state 1513 * 1514 * This function should be used by legacy entry points which don't understand 1515 * -EDEADLK semantics. For simplicity this one will grab all modeset locks after 1516 * the slowpath completed. 1517 */ 1518 void drm_atomic_legacy_backoff(struct drm_atomic_state *state) 1519 { 1520 struct drm_device *dev = state->dev; 1521 int ret; 1522 bool global = false; 1523 1524 if (WARN_ON(dev->mode_config.acquire_ctx == state->acquire_ctx)) { 1525 global = true; 1526 1527 dev->mode_config.acquire_ctx = NULL; 1528 } 1529 1530 retry: 1531 drm_modeset_backoff(state->acquire_ctx); 1532 1533 ret = drm_modeset_lock_all_ctx(dev, state->acquire_ctx); 1534 if (ret) 1535 goto retry; 1536 1537 if (global) 1538 dev->mode_config.acquire_ctx = state->acquire_ctx; 1539 } 1540 EXPORT_SYMBOL(drm_atomic_legacy_backoff); 1541 1542 /** 1543 * drm_atomic_check_only - check whether a given config would work 1544 * @state: atomic configuration to check 1545 * 1546 * Note that this function can return -EDEADLK if the driver needed to acquire 1547 * more locks but encountered a deadlock. The caller must then do the usual w/w 1548 * backoff dance and restart. All other errors are fatal. 1549 * 1550 * Returns: 1551 * 0 on success, negative error code on failure. 1552 */ 1553 int drm_atomic_check_only(struct drm_atomic_state *state) 1554 { 1555 struct drm_device *dev = state->dev; 1556 struct drm_mode_config *config = &dev->mode_config; 1557 struct drm_plane *plane; 1558 struct drm_plane_state *plane_state; 1559 struct drm_crtc *crtc; 1560 struct drm_crtc_state *crtc_state; 1561 int i, ret = 0; 1562 1563 DRM_DEBUG_ATOMIC("checking %p\n", state); 1564 1565 for_each_new_plane_in_state(state, plane, plane_state, i) { 1566 ret = drm_atomic_plane_check(plane, plane_state); 1567 if (ret) { 1568 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n", 1569 plane->base.id, plane->name); 1570 return ret; 1571 } 1572 } 1573 1574 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1575 ret = drm_atomic_crtc_check(crtc, crtc_state); 1576 if (ret) { 1577 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n", 1578 crtc->base.id, crtc->name); 1579 return ret; 1580 } 1581 } 1582 1583 if (config->funcs->atomic_check) 1584 ret = config->funcs->atomic_check(state->dev, state); 1585 1586 if (ret) 1587 return ret; 1588 1589 if (!state->allow_modeset) { 1590 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1591 if (drm_atomic_crtc_needs_modeset(crtc_state)) { 1592 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n", 1593 crtc->base.id, crtc->name); 1594 return -EINVAL; 1595 } 1596 } 1597 } 1598 1599 return 0; 1600 } 1601 EXPORT_SYMBOL(drm_atomic_check_only); 1602 1603 /** 1604 * drm_atomic_commit - commit configuration atomically 1605 * @state: atomic configuration to check 1606 * 1607 * Note that this function can return -EDEADLK if the driver needed to acquire 1608 * more locks but encountered a deadlock. The caller must then do the usual w/w 1609 * backoff dance and restart. All other errors are fatal. 1610 * 1611 * This function will take its own reference on @state. 1612 * Callers should always release their reference with drm_atomic_state_put(). 1613 * 1614 * Returns: 1615 * 0 on success, negative error code on failure. 1616 */ 1617 int drm_atomic_commit(struct drm_atomic_state *state) 1618 { 1619 struct drm_mode_config *config = &state->dev->mode_config; 1620 int ret; 1621 1622 ret = drm_atomic_check_only(state); 1623 if (ret) 1624 return ret; 1625 1626 DRM_DEBUG_ATOMIC("commiting %p\n", state); 1627 1628 return config->funcs->atomic_commit(state->dev, state, false); 1629 } 1630 EXPORT_SYMBOL(drm_atomic_commit); 1631 1632 /** 1633 * drm_atomic_nonblocking_commit - atomic nonblocking commit 1634 * @state: atomic configuration to check 1635 * 1636 * Note that this function can return -EDEADLK if the driver needed to acquire 1637 * more locks but encountered a deadlock. The caller must then do the usual w/w 1638 * backoff dance and restart. All other errors are fatal. 1639 * 1640 * This function will take its own reference on @state. 1641 * Callers should always release their reference with drm_atomic_state_put(). 1642 * 1643 * Returns: 1644 * 0 on success, negative error code on failure. 1645 */ 1646 int drm_atomic_nonblocking_commit(struct drm_atomic_state *state) 1647 { 1648 struct drm_mode_config *config = &state->dev->mode_config; 1649 int ret; 1650 1651 ret = drm_atomic_check_only(state); 1652 if (ret) 1653 return ret; 1654 1655 DRM_DEBUG_ATOMIC("commiting %p nonblocking\n", state); 1656 1657 return config->funcs->atomic_commit(state->dev, state, true); 1658 } 1659 EXPORT_SYMBOL(drm_atomic_nonblocking_commit); 1660 1661 static void drm_atomic_print_state(const struct drm_atomic_state *state) 1662 { 1663 struct drm_printer p = drm_info_printer(state->dev->dev); 1664 struct drm_plane *plane; 1665 struct drm_plane_state *plane_state; 1666 struct drm_crtc *crtc; 1667 struct drm_crtc_state *crtc_state; 1668 struct drm_connector *connector; 1669 struct drm_connector_state *connector_state; 1670 int i; 1671 1672 DRM_DEBUG_ATOMIC("checking %p\n", state); 1673 1674 for_each_new_plane_in_state(state, plane, plane_state, i) 1675 drm_atomic_plane_print_state(&p, plane_state); 1676 1677 for_each_new_crtc_in_state(state, crtc, crtc_state, i) 1678 drm_atomic_crtc_print_state(&p, crtc_state); 1679 1680 for_each_new_connector_in_state(state, connector, connector_state, i) 1681 drm_atomic_connector_print_state(&p, connector_state); 1682 } 1683 1684 static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p, 1685 bool take_locks) 1686 { 1687 struct drm_mode_config *config = &dev->mode_config; 1688 struct drm_plane *plane; 1689 struct drm_crtc *crtc; 1690 struct drm_connector *connector; 1691 struct drm_connector_list_iter conn_iter; 1692 1693 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 1694 return; 1695 1696 list_for_each_entry(plane, &config->plane_list, head) { 1697 if (take_locks) 1698 drm_modeset_lock(&plane->mutex, NULL); 1699 drm_atomic_plane_print_state(p, plane->state); 1700 if (take_locks) 1701 drm_modeset_unlock(&plane->mutex); 1702 } 1703 1704 list_for_each_entry(crtc, &config->crtc_list, head) { 1705 if (take_locks) 1706 drm_modeset_lock(&crtc->mutex, NULL); 1707 drm_atomic_crtc_print_state(p, crtc->state); 1708 if (take_locks) 1709 drm_modeset_unlock(&crtc->mutex); 1710 } 1711 1712 drm_connector_list_iter_begin(dev, &conn_iter); 1713 if (take_locks) 1714 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 1715 drm_for_each_connector_iter(connector, &conn_iter) 1716 drm_atomic_connector_print_state(p, connector->state); 1717 if (take_locks) 1718 drm_modeset_unlock(&dev->mode_config.connection_mutex); 1719 drm_connector_list_iter_end(&conn_iter); 1720 } 1721 1722 /** 1723 * drm_state_dump - dump entire device atomic state 1724 * @dev: the drm device 1725 * @p: where to print the state to 1726 * 1727 * Just for debugging. Drivers might want an option to dump state 1728 * to dmesg in case of error irq's. (Hint, you probably want to 1729 * ratelimit this!) 1730 * 1731 * The caller must drm_modeset_lock_all(), or if this is called 1732 * from error irq handler, it should not be enabled by default. 1733 * (Ie. if you are debugging errors you might not care that this 1734 * is racey. But calling this without all modeset locks held is 1735 * not inherently safe.) 1736 */ 1737 void drm_state_dump(struct drm_device *dev, struct drm_printer *p) 1738 { 1739 __drm_state_dump(dev, p, false); 1740 } 1741 EXPORT_SYMBOL(drm_state_dump); 1742 1743 #ifdef CONFIG_DEBUG_FS 1744 static int drm_state_info(struct seq_file *m, void *data) 1745 { 1746 struct drm_info_node *node = (struct drm_info_node *) m->private; 1747 struct drm_device *dev = node->minor->dev; 1748 struct drm_printer p = drm_seq_file_printer(m); 1749 1750 __drm_state_dump(dev, &p, true); 1751 1752 return 0; 1753 } 1754 1755 /* any use in debugfs files to dump individual planes/crtc/etc? */ 1756 static const struct drm_info_list drm_atomic_debugfs_list[] = { 1757 {"state", drm_state_info, 0}, 1758 }; 1759 1760 int drm_atomic_debugfs_init(struct drm_minor *minor) 1761 { 1762 return drm_debugfs_create_files(drm_atomic_debugfs_list, 1763 ARRAY_SIZE(drm_atomic_debugfs_list), 1764 minor->debugfs_root, minor); 1765 } 1766 #endif 1767 1768 /* 1769 * The big monstor ioctl 1770 */ 1771 1772 static struct drm_pending_vblank_event *create_vblank_event( 1773 struct drm_device *dev, uint64_t user_data) 1774 { 1775 struct drm_pending_vblank_event *e = NULL; 1776 1777 e = kzalloc(sizeof *e, GFP_KERNEL); 1778 if (!e) 1779 return NULL; 1780 1781 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 1782 e->event.base.length = sizeof(e->event); 1783 e->event.user_data = user_data; 1784 1785 return e; 1786 } 1787 1788 static int atomic_set_prop(struct drm_atomic_state *state, 1789 struct drm_mode_object *obj, struct drm_property *prop, 1790 uint64_t prop_value) 1791 { 1792 struct drm_mode_object *ref; 1793 int ret; 1794 1795 if (!drm_property_change_valid_get(prop, prop_value, &ref)) 1796 return -EINVAL; 1797 1798 switch (obj->type) { 1799 case DRM_MODE_OBJECT_CONNECTOR: { 1800 struct drm_connector *connector = obj_to_connector(obj); 1801 struct drm_connector_state *connector_state; 1802 1803 connector_state = drm_atomic_get_connector_state(state, connector); 1804 if (IS_ERR(connector_state)) { 1805 ret = PTR_ERR(connector_state); 1806 break; 1807 } 1808 1809 ret = drm_atomic_connector_set_property(connector, 1810 connector_state, prop, prop_value); 1811 break; 1812 } 1813 case DRM_MODE_OBJECT_CRTC: { 1814 struct drm_crtc *crtc = obj_to_crtc(obj); 1815 struct drm_crtc_state *crtc_state; 1816 1817 crtc_state = drm_atomic_get_crtc_state(state, crtc); 1818 if (IS_ERR(crtc_state)) { 1819 ret = PTR_ERR(crtc_state); 1820 break; 1821 } 1822 1823 ret = drm_atomic_crtc_set_property(crtc, 1824 crtc_state, prop, prop_value); 1825 break; 1826 } 1827 case DRM_MODE_OBJECT_PLANE: { 1828 struct drm_plane *plane = obj_to_plane(obj); 1829 struct drm_plane_state *plane_state; 1830 1831 plane_state = drm_atomic_get_plane_state(state, plane); 1832 if (IS_ERR(plane_state)) { 1833 ret = PTR_ERR(plane_state); 1834 break; 1835 } 1836 1837 ret = drm_atomic_plane_set_property(plane, 1838 plane_state, prop, prop_value); 1839 break; 1840 } 1841 default: 1842 ret = -EINVAL; 1843 break; 1844 } 1845 1846 drm_property_change_valid_put(prop, ref); 1847 return ret; 1848 } 1849 1850 /** 1851 * drm_atomic_clean_old_fb -- Unset old_fb pointers and set plane->fb pointers. 1852 * 1853 * @dev: drm device to check. 1854 * @plane_mask: plane mask for planes that were updated. 1855 * @ret: return value, can be -EDEADLK for a retry. 1856 * 1857 * Before doing an update &drm_plane.old_fb is set to &drm_plane.fb, but before 1858 * dropping the locks old_fb needs to be set to NULL and plane->fb updated. This 1859 * is a common operation for each atomic update, so this call is split off as a 1860 * helper. 1861 */ 1862 void drm_atomic_clean_old_fb(struct drm_device *dev, 1863 unsigned plane_mask, 1864 int ret) 1865 { 1866 struct drm_plane *plane; 1867 1868 /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping 1869 * locks (ie. while it is still safe to deref plane->state). We 1870 * need to do this here because the driver entry points cannot 1871 * distinguish between legacy and atomic ioctls. 1872 */ 1873 drm_for_each_plane_mask(plane, dev, plane_mask) { 1874 if (ret == 0) { 1875 struct drm_framebuffer *new_fb = plane->state->fb; 1876 if (new_fb) 1877 drm_framebuffer_get(new_fb); 1878 plane->fb = new_fb; 1879 plane->crtc = plane->state->crtc; 1880 1881 if (plane->old_fb) 1882 drm_framebuffer_put(plane->old_fb); 1883 } 1884 plane->old_fb = NULL; 1885 } 1886 } 1887 EXPORT_SYMBOL(drm_atomic_clean_old_fb); 1888 1889 /** 1890 * DOC: explicit fencing properties 1891 * 1892 * Explicit fencing allows userspace to control the buffer synchronization 1893 * between devices. A Fence or a group of fences are transfered to/from 1894 * userspace using Sync File fds and there are two DRM properties for that. 1895 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and 1896 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel. 1897 * 1898 * As a contrast, with implicit fencing the kernel keeps track of any 1899 * ongoing rendering, and automatically ensures that the atomic update waits 1900 * for any pending rendering to complete. For shared buffers represented with 1901 * a &struct dma_buf this is tracked in &struct reservation_object. 1902 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org), 1903 * whereas explicit fencing is what Android wants. 1904 * 1905 * "IN_FENCE_FD”: 1906 * Use this property to pass a fence that DRM should wait on before 1907 * proceeding with the Atomic Commit request and show the framebuffer for 1908 * the plane on the screen. The fence can be either a normal fence or a 1909 * merged one, the sync_file framework will handle both cases and use a 1910 * fence_array if a merged fence is received. Passing -1 here means no 1911 * fences to wait on. 1912 * 1913 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag 1914 * it will only check if the Sync File is a valid one. 1915 * 1916 * On the driver side the fence is stored on the @fence parameter of 1917 * &struct drm_plane_state. Drivers which also support implicit fencing 1918 * should set the implicit fence using drm_atomic_set_fence_for_plane(), 1919 * to make sure there's consistent behaviour between drivers in precedence 1920 * of implicit vs. explicit fencing. 1921 * 1922 * "OUT_FENCE_PTR”: 1923 * Use this property to pass a file descriptor pointer to DRM. Once the 1924 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with 1925 * the file descriptor number of a Sync File. This Sync File contains the 1926 * CRTC fence that will be signaled when all framebuffers present on the 1927 * Atomic Commit * request for that given CRTC are scanned out on the 1928 * screen. 1929 * 1930 * The Atomic Commit request fails if a invalid pointer is passed. If the 1931 * Atomic Commit request fails for any other reason the out fence fd 1932 * returned will be -1. On a Atomic Commit with the 1933 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1. 1934 * 1935 * Note that out-fences don't have a special interface to drivers and are 1936 * internally represented by a &struct drm_pending_vblank_event in struct 1937 * &drm_crtc_state, which is also used by the nonblocking atomic commit 1938 * helpers and for the DRM event handling for existing userspace. 1939 */ 1940 1941 struct drm_out_fence_state { 1942 s32 __user *out_fence_ptr; 1943 struct sync_file *sync_file; 1944 int fd; 1945 }; 1946 1947 static int setup_out_fence(struct drm_out_fence_state *fence_state, 1948 struct dma_fence *fence) 1949 { 1950 fence_state->fd = get_unused_fd_flags(O_CLOEXEC); 1951 if (fence_state->fd < 0) 1952 return fence_state->fd; 1953 1954 if (put_user(fence_state->fd, fence_state->out_fence_ptr)) 1955 return -EFAULT; 1956 1957 fence_state->sync_file = sync_file_create(fence); 1958 if (!fence_state->sync_file) 1959 return -ENOMEM; 1960 1961 return 0; 1962 } 1963 1964 static int prepare_crtc_signaling(struct drm_device *dev, 1965 struct drm_atomic_state *state, 1966 struct drm_mode_atomic *arg, 1967 struct drm_file *file_priv, 1968 struct drm_out_fence_state **fence_state, 1969 unsigned int *num_fences) 1970 { 1971 struct drm_crtc *crtc; 1972 struct drm_crtc_state *crtc_state; 1973 int i, ret; 1974 1975 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) 1976 return 0; 1977 1978 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 1979 s32 __user *fence_ptr; 1980 1981 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); 1982 1983 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { 1984 struct drm_pending_vblank_event *e; 1985 1986 e = create_vblank_event(dev, arg->user_data); 1987 if (!e) 1988 return -ENOMEM; 1989 1990 crtc_state->event = e; 1991 } 1992 1993 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { 1994 struct drm_pending_vblank_event *e = crtc_state->event; 1995 1996 if (!file_priv) 1997 continue; 1998 1999 ret = drm_event_reserve_init(dev, file_priv, &e->base, 2000 &e->event.base); 2001 if (ret) { 2002 kfree(e); 2003 crtc_state->event = NULL; 2004 return ret; 2005 } 2006 } 2007 2008 if (fence_ptr) { 2009 struct dma_fence *fence; 2010 struct drm_out_fence_state *f; 2011 2012 f = krealloc(*fence_state, 2013 sizeof(**fence_state) * (*num_fences + 1), 2014 M_DRM, GFP_KERNEL); 2015 if (!f) 2016 return -ENOMEM; 2017 2018 memset(&f[*num_fences], 0, sizeof(*f)); 2019 2020 f[*num_fences].out_fence_ptr = fence_ptr; 2021 *fence_state = f; 2022 2023 fence = drm_crtc_create_fence(crtc); 2024 if (!fence) 2025 return -ENOMEM; 2026 2027 ret = setup_out_fence(&f[(*num_fences)++], fence); 2028 if (ret) { 2029 dma_fence_put(fence); 2030 return ret; 2031 } 2032 2033 crtc_state->event->base.fence = fence; 2034 } 2035 } 2036 2037 return 0; 2038 } 2039 2040 static void complete_crtc_signaling(struct drm_device *dev, 2041 struct drm_atomic_state *state, 2042 struct drm_out_fence_state *fence_state, 2043 unsigned int num_fences, 2044 bool install_fds) 2045 { 2046 struct drm_crtc *crtc; 2047 struct drm_crtc_state *crtc_state; 2048 int i; 2049 2050 if (install_fds) { 2051 for (i = 0; i < num_fences; i++) 2052 fd_install(fence_state[i].fd, 2053 fence_state[i].sync_file->file); 2054 2055 kfree(fence_state); 2056 return; 2057 } 2058 2059 for_each_new_crtc_in_state(state, crtc, crtc_state, i) { 2060 struct drm_pending_vblank_event *event = crtc_state->event; 2061 /* 2062 * Free the allocated event. drm_atomic_helper_setup_commit 2063 * can allocate an event too, so only free it if it's ours 2064 * to prevent a double free in drm_atomic_state_clear. 2065 */ 2066 if (event && (event->base.fence || event->base.file_priv)) { 2067 drm_event_cancel_free(dev, &event->base); 2068 crtc_state->event = NULL; 2069 } 2070 } 2071 2072 if (!fence_state) 2073 return; 2074 2075 for (i = 0; i < num_fences; i++) { 2076 if (fence_state[i].sync_file) 2077 fput(fence_state[i].sync_file->file); 2078 if (fence_state[i].fd >= 0) 2079 put_unused_fd(fence_state[i].fd); 2080 2081 /* If this fails log error to the user */ 2082 if (fence_state[i].out_fence_ptr && 2083 put_user(-1, fence_state[i].out_fence_ptr)) 2084 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n"); 2085 } 2086 2087 kfree(fence_state); 2088 } 2089 2090 int drm_mode_atomic_ioctl(struct drm_device *dev, 2091 void *data, struct drm_file *file_priv) 2092 { 2093 struct drm_mode_atomic *arg = data; 2094 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); 2095 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); 2096 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 2097 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); 2098 unsigned int copied_objs, copied_props; 2099 struct drm_atomic_state *state; 2100 struct drm_modeset_acquire_ctx ctx; 2101 struct drm_plane *plane; 2102 struct drm_out_fence_state *fence_state; 2103 unsigned plane_mask; 2104 int ret = 0; 2105 unsigned int i, j, num_fences; 2106 2107 /* disallow for drivers not supporting atomic: */ 2108 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 2109 return -EINVAL; 2110 2111 /* disallow for userspace that has not enabled atomic cap (even 2112 * though this may be a bit overkill, since legacy userspace 2113 * wouldn't know how to call this ioctl) 2114 */ 2115 if (!file_priv->atomic) 2116 return -EINVAL; 2117 2118 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) 2119 return -EINVAL; 2120 2121 if (arg->reserved) 2122 return -EINVAL; 2123 2124 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) && 2125 !dev->mode_config.async_page_flip) 2126 return -EINVAL; 2127 2128 /* can't test and expect an event at the same time. */ 2129 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && 2130 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) 2131 return -EINVAL; 2132 2133 drm_modeset_acquire_init(&ctx, 0); 2134 2135 state = drm_atomic_state_alloc(dev); 2136 if (!state) 2137 return -ENOMEM; 2138 2139 state->acquire_ctx = &ctx; 2140 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); 2141 2142 retry: 2143 plane_mask = 0; 2144 copied_objs = 0; 2145 copied_props = 0; 2146 fence_state = NULL; 2147 num_fences = 0; 2148 2149 for (i = 0; i < arg->count_objs; i++) { 2150 uint32_t obj_id, count_props; 2151 struct drm_mode_object *obj; 2152 2153 if (get_user(obj_id, objs_ptr + copied_objs)) { 2154 ret = -EFAULT; 2155 goto out; 2156 } 2157 2158 obj = drm_mode_object_find(dev, obj_id, DRM_MODE_OBJECT_ANY); 2159 if (!obj) { 2160 ret = -ENOENT; 2161 goto out; 2162 } 2163 2164 if (!obj->properties) { 2165 drm_mode_object_put(obj); 2166 ret = -ENOENT; 2167 goto out; 2168 } 2169 2170 if (get_user(count_props, count_props_ptr + copied_objs)) { 2171 drm_mode_object_put(obj); 2172 ret = -EFAULT; 2173 goto out; 2174 } 2175 2176 copied_objs++; 2177 2178 for (j = 0; j < count_props; j++) { 2179 uint32_t prop_id; 2180 uint64_t prop_value; 2181 struct drm_property *prop; 2182 2183 if (get_user(prop_id, props_ptr + copied_props)) { 2184 drm_mode_object_put(obj); 2185 ret = -EFAULT; 2186 goto out; 2187 } 2188 2189 prop = drm_mode_obj_find_prop_id(obj, prop_id); 2190 if (!prop) { 2191 drm_mode_object_put(obj); 2192 ret = -ENOENT; 2193 goto out; 2194 } 2195 2196 if (copy_from_user(&prop_value, 2197 prop_values_ptr + copied_props, 2198 sizeof(prop_value))) { 2199 drm_mode_object_put(obj); 2200 ret = -EFAULT; 2201 goto out; 2202 } 2203 2204 ret = atomic_set_prop(state, obj, prop, prop_value); 2205 if (ret) { 2206 drm_mode_object_put(obj); 2207 goto out; 2208 } 2209 2210 copied_props++; 2211 } 2212 2213 if (obj->type == DRM_MODE_OBJECT_PLANE && count_props && 2214 !(arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)) { 2215 plane = obj_to_plane(obj); 2216 plane_mask |= (1 << drm_plane_index(plane)); 2217 plane->old_fb = plane->fb; 2218 } 2219 drm_mode_object_put(obj); 2220 } 2221 2222 ret = prepare_crtc_signaling(dev, state, arg, file_priv, &fence_state, 2223 &num_fences); 2224 if (ret) 2225 goto out; 2226 2227 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { 2228 ret = drm_atomic_check_only(state); 2229 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { 2230 ret = drm_atomic_nonblocking_commit(state); 2231 } else { 2232 if (unlikely(drm_debug & DRM_UT_STATE)) 2233 drm_atomic_print_state(state); 2234 2235 ret = drm_atomic_commit(state); 2236 } 2237 2238 out: 2239 drm_atomic_clean_old_fb(dev, plane_mask, ret); 2240 2241 complete_crtc_signaling(dev, state, fence_state, num_fences, !ret); 2242 2243 if (ret == -EDEADLK) { 2244 drm_atomic_state_clear(state); 2245 drm_modeset_backoff(&ctx); 2246 goto retry; 2247 } 2248 2249 drm_atomic_state_put(state); 2250 2251 drm_modeset_drop_locks(&ctx); 2252 drm_modeset_acquire_fini(&ctx); 2253 2254 return ret; 2255 } 2256