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1/*2 * Copyright (C) 2014 Red Hat3 * 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 a8 * copy of this software and associated documentation files (the "Software"),9 * to deal in the Software without restriction, including without limitation10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,11 * and/or sell copies of the Software, and to permit persons to whom the12 * Software is furnished to do so, subject to the following conditions:13 *14 * The above copyright notice and this permission notice shall be included in15 * all copies or substantial portions of the Software.16 *17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL20 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR21 * 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 OR23 * OTHER DEALINGS IN THE SOFTWARE.24 *25 * Authors:26 * Rob Clark <robdclark@gmail.com>27 * Daniel Vetter <daniel.vetter@ffwll.ch>28 */29 30#include <drm/drm_atomic_uapi.h>31#include <drm/drm_atomic.h>32#include <drm/drm_framebuffer.h>33#include <drm/drm_print.h>34#include <drm/drm_drv.h>35#include <drm/drm_writeback.h>36#include <drm/drm_vblank.h>37 38#include <linux/dma-fence.h>39#include <linux/uaccess.h>40#include <linux/sync_file.h>41#include <linux/file.h>42 43#include "drm_crtc_internal.h"44 45/**46 * DOC: overview47 *48 * This file contains the marshalling and demarshalling glue for the atomic UAPI49 * in all its forms: The monster ATOMIC IOCTL itself, code for GET_PROPERTY and50 * SET_PROPERTY IOCTLs. Plus interface functions for compatibility helpers and51 * drivers which have special needs to construct their own atomic updates, e.g.52 * for load detect or similar.53 */54 55/**56 * drm_atomic_set_mode_for_crtc - set mode for CRTC57 * @state: the CRTC whose incoming state to update58 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable59 *60 * Set a mode (originating from the kernel) on the desired CRTC state and update61 * the enable property.62 *63 * RETURNS:64 * Zero on success, error code on failure. Cannot return -EDEADLK.65 */66int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,67 const struct drm_display_mode *mode)68{69 struct drm_crtc *crtc = state->crtc;70 struct drm_mode_modeinfo umode;71 72 /* Early return for no change. */73 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)74 return 0;75 76 drm_property_blob_put(state->mode_blob);77 state->mode_blob = NULL;78 79 if (mode) {80 struct drm_property_blob *blob;81 82 drm_mode_convert_to_umode(&umode, mode);83 blob = drm_property_create_blob(crtc->dev,84 sizeof(umode), &umode);85 if (IS_ERR(blob))86 return PTR_ERR(blob);87 88 drm_mode_copy(&state->mode, mode);89 90 state->mode_blob = blob;91 state->enable = true;92 drm_dbg_atomic(crtc->dev,93 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n",94 mode->name, crtc->base.id, crtc->name, state);95 } else {96 memset(&state->mode, 0, sizeof(state->mode));97 state->enable = false;98 drm_dbg_atomic(crtc->dev,99 "Set [NOMODE] for [CRTC:%d:%s] state %p\n",100 crtc->base.id, crtc->name, state);101 }102 103 return 0;104}105EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);106 107/**108 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC109 * @state: the CRTC whose incoming state to update110 * @blob: pointer to blob property to use for mode111 *112 * Set a mode (originating from a blob property) on the desired CRTC state.113 * This function will take a reference on the blob property for the CRTC state,114 * and release the reference held on the state's existing mode property, if any115 * was set.116 *117 * RETURNS:118 * Zero on success, error code on failure. Cannot return -EDEADLK.119 */120int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,121 struct drm_property_blob *blob)122{123 struct drm_crtc *crtc = state->crtc;124 125 if (blob == state->mode_blob)126 return 0;127 128 drm_property_blob_put(state->mode_blob);129 state->mode_blob = NULL;130 131 memset(&state->mode, 0, sizeof(state->mode));132 133 if (blob) {134 int ret;135 136 if (blob->length != sizeof(struct drm_mode_modeinfo)) {137 drm_dbg_atomic(crtc->dev,138 "[CRTC:%d:%s] bad mode blob length: %zu\n",139 crtc->base.id, crtc->name,140 blob->length);141 return -EINVAL;142 }143 144 ret = drm_mode_convert_umode(crtc->dev,145 &state->mode, blob->data);146 if (ret) {147 drm_dbg_atomic(crtc->dev,148 "[CRTC:%d:%s] invalid mode (%s, %pe): " DRM_MODE_FMT "\n",149 crtc->base.id, crtc->name,150 drm_get_mode_status_name(state->mode.status),151 ERR_PTR(ret), DRM_MODE_ARG(&state->mode));152 return -EINVAL;153 }154 155 state->mode_blob = drm_property_blob_get(blob);156 state->enable = true;157 drm_dbg_atomic(crtc->dev,158 "Set [MODE:%s] for [CRTC:%d:%s] state %p\n",159 state->mode.name, crtc->base.id, crtc->name,160 state);161 } else {162 state->enable = false;163 drm_dbg_atomic(crtc->dev,164 "Set [NOMODE] for [CRTC:%d:%s] state %p\n",165 crtc->base.id, crtc->name, state);166 }167 168 return 0;169}170EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);171 172/**173 * drm_atomic_set_crtc_for_plane - set CRTC for plane174 * @plane_state: the plane whose incoming state to update175 * @crtc: CRTC to use for the plane176 *177 * Changing the assigned CRTC for a plane requires us to grab the lock and state178 * for the new CRTC, as needed. This function takes care of all these details179 * besides updating the pointer in the state object itself.180 *181 * Returns:182 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK183 * then the w/w mutex code has detected a deadlock and the entire atomic184 * sequence must be restarted. All other errors are fatal.185 */186int187drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,188 struct drm_crtc *crtc)189{190 struct drm_plane *plane = plane_state->plane;191 struct drm_crtc_state *crtc_state;192 /* Nothing to do for same crtc*/193 if (plane_state->crtc == crtc)194 return 0;195 if (plane_state->crtc) {196 crtc_state = drm_atomic_get_crtc_state(plane_state->state,197 plane_state->crtc);198 if (WARN_ON(IS_ERR(crtc_state)))199 return PTR_ERR(crtc_state);200 201 crtc_state->plane_mask &= ~drm_plane_mask(plane);202 }203 204 plane_state->crtc = crtc;205 206 if (crtc) {207 crtc_state = drm_atomic_get_crtc_state(plane_state->state,208 crtc);209 if (IS_ERR(crtc_state))210 return PTR_ERR(crtc_state);211 crtc_state->plane_mask |= drm_plane_mask(plane);212 }213 214 if (crtc)215 drm_dbg_atomic(plane->dev,216 "Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n",217 plane->base.id, plane->name, plane_state,218 crtc->base.id, crtc->name);219 else220 drm_dbg_atomic(plane->dev,221 "Link [PLANE:%d:%s] state %p to [NOCRTC]\n",222 plane->base.id, plane->name, plane_state);223 224 return 0;225}226EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);227 228/**229 * drm_atomic_set_fb_for_plane - set framebuffer for plane230 * @plane_state: atomic state object for the plane231 * @fb: fb to use for the plane232 *233 * Changing the assigned framebuffer for a plane requires us to grab a reference234 * to the new fb and drop the reference to the old fb, if there is one. This235 * function takes care of all these details besides updating the pointer in the236 * state object itself.237 */238void239drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,240 struct drm_framebuffer *fb)241{242 struct drm_plane *plane = plane_state->plane;243 244 if (fb)245 drm_dbg_atomic(plane->dev,246 "Set [FB:%d] for [PLANE:%d:%s] state %p\n",247 fb->base.id, plane->base.id, plane->name,248 plane_state);249 else250 drm_dbg_atomic(plane->dev,251 "Set [NOFB] for [PLANE:%d:%s] state %p\n",252 plane->base.id, plane->name, plane_state);253 254 drm_framebuffer_assign(&plane_state->fb, fb);255}256EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);257 258/**259 * drm_atomic_set_crtc_for_connector - set CRTC for connector260 * @conn_state: atomic state object for the connector261 * @crtc: CRTC to use for the connector262 *263 * Changing the assigned CRTC for a connector requires us to grab the lock and264 * state for the new CRTC, as needed. This function takes care of all these265 * details besides updating the pointer in the state object itself.266 *267 * Returns:268 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK269 * then the w/w mutex code has detected a deadlock and the entire atomic270 * sequence must be restarted. All other errors are fatal.271 */272int273drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,274 struct drm_crtc *crtc)275{276 struct drm_connector *connector = conn_state->connector;277 struct drm_crtc_state *crtc_state;278 279 if (conn_state->crtc == crtc)280 return 0;281 282 if (conn_state->crtc) {283 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,284 conn_state->crtc);285 286 crtc_state->connector_mask &=287 ~drm_connector_mask(conn_state->connector);288 289 drm_connector_put(conn_state->connector);290 conn_state->crtc = NULL;291 }292 293 if (crtc) {294 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);295 if (IS_ERR(crtc_state))296 return PTR_ERR(crtc_state);297 298 crtc_state->connector_mask |=299 drm_connector_mask(conn_state->connector);300 301 drm_connector_get(conn_state->connector);302 conn_state->crtc = crtc;303 304 drm_dbg_atomic(connector->dev,305 "Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n",306 connector->base.id, connector->name,307 conn_state, crtc->base.id, crtc->name);308 } else {309 drm_dbg_atomic(connector->dev,310 "Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n",311 connector->base.id, connector->name,312 conn_state);313 }314 315 return 0;316}317EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);318 319static void set_out_fence_for_crtc(struct drm_atomic_state *state,320 struct drm_crtc *crtc, s32 __user *fence_ptr)321{322 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr;323}324 325static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state,326 struct drm_crtc *crtc)327{328 s32 __user *fence_ptr;329 330 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr;331 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL;332 333 return fence_ptr;334}335 336static int set_out_fence_for_connector(struct drm_atomic_state *state,337 struct drm_connector *connector,338 s32 __user *fence_ptr)339{340 unsigned int index = drm_connector_index(connector);341 342 if (!fence_ptr)343 return 0;344 345 if (put_user(-1, fence_ptr))346 return -EFAULT;347 348 state->connectors[index].out_fence_ptr = fence_ptr;349 350 return 0;351}352 353static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state,354 struct drm_connector *connector)355{356 unsigned int index = drm_connector_index(connector);357 s32 __user *fence_ptr;358 359 fence_ptr = state->connectors[index].out_fence_ptr;360 state->connectors[index].out_fence_ptr = NULL;361 362 return fence_ptr;363}364 365static int drm_atomic_crtc_set_property(struct drm_crtc *crtc,366 struct drm_crtc_state *state, struct drm_property *property,367 uint64_t val)368{369 struct drm_device *dev = crtc->dev;370 struct drm_mode_config *config = &dev->mode_config;371 bool replaced = false;372 int ret;373 374 if (property == config->prop_active)375 state->active = val;376 else if (property == config->prop_mode_id) {377 struct drm_property_blob *mode =378 drm_property_lookup_blob(dev, val);379 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);380 drm_property_blob_put(mode);381 return ret;382 } else if (property == config->prop_vrr_enabled) {383 state->vrr_enabled = val;384 } else if (property == config->degamma_lut_property) {385 ret = drm_property_replace_blob_from_id(dev,386 &state->degamma_lut,387 val,388 -1, sizeof(struct drm_color_lut),389 &replaced);390 state->color_mgmt_changed |= replaced;391 return ret;392 } else if (property == config->ctm_property) {393 ret = drm_property_replace_blob_from_id(dev,394 &state->ctm,395 val,396 sizeof(struct drm_color_ctm), -1,397 &replaced);398 state->color_mgmt_changed |= replaced;399 return ret;400 } else if (property == config->gamma_lut_property) {401 ret = drm_property_replace_blob_from_id(dev,402 &state->gamma_lut,403 val,404 -1, sizeof(struct drm_color_lut),405 &replaced);406 state->color_mgmt_changed |= replaced;407 return ret;408 } else if (property == config->prop_out_fence_ptr) {409 s32 __user *fence_ptr = u64_to_user_ptr(val);410 411 if (!fence_ptr)412 return 0;413 414 if (put_user(-1, fence_ptr))415 return -EFAULT;416 417 set_out_fence_for_crtc(state->state, crtc, fence_ptr);418 } else if (property == crtc->scaling_filter_property) {419 state->scaling_filter = val;420 } else if (crtc->funcs->atomic_set_property) {421 return crtc->funcs->atomic_set_property(crtc, state, property, val);422 } else {423 drm_dbg_atomic(crtc->dev,424 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n",425 crtc->base.id, crtc->name,426 property->base.id, property->name);427 return -EINVAL;428 }429 430 return 0;431}432 433static int434drm_atomic_crtc_get_property(struct drm_crtc *crtc,435 const struct drm_crtc_state *state,436 struct drm_property *property, uint64_t *val)437{438 struct drm_device *dev = crtc->dev;439 struct drm_mode_config *config = &dev->mode_config;440 441 if (property == config->prop_active)442 *val = drm_atomic_crtc_effectively_active(state);443 else if (property == config->prop_mode_id)444 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;445 else if (property == config->prop_vrr_enabled)446 *val = state->vrr_enabled;447 else if (property == config->degamma_lut_property)448 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;449 else if (property == config->ctm_property)450 *val = (state->ctm) ? state->ctm->base.id : 0;451 else if (property == config->gamma_lut_property)452 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;453 else if (property == config->prop_out_fence_ptr)454 *val = 0;455 else if (property == crtc->scaling_filter_property)456 *val = state->scaling_filter;457 else if (crtc->funcs->atomic_get_property)458 return crtc->funcs->atomic_get_property(crtc, state, property, val);459 else {460 drm_dbg_atomic(dev,461 "[CRTC:%d:%s] unknown property [PROP:%d:%s]\n",462 crtc->base.id, crtc->name,463 property->base.id, property->name);464 return -EINVAL;465 }466 467 return 0;468}469 470static int drm_atomic_plane_set_property(struct drm_plane *plane,471 struct drm_plane_state *state, struct drm_file *file_priv,472 struct drm_property *property, uint64_t val)473{474 struct drm_device *dev = plane->dev;475 struct drm_mode_config *config = &dev->mode_config;476 bool replaced = false;477 int ret;478 479 if (property == config->prop_fb_id) {480 struct drm_framebuffer *fb;481 482 fb = drm_framebuffer_lookup(dev, file_priv, val);483 drm_atomic_set_fb_for_plane(state, fb);484 if (fb)485 drm_framebuffer_put(fb);486 } else if (property == config->prop_in_fence_fd) {487 if (state->fence)488 return -EINVAL;489 490 if (U642I64(val) == -1)491 return 0;492 493 state->fence = sync_file_get_fence(val);494 if (!state->fence)495 return -EINVAL;496 497 } else if (property == config->prop_crtc_id) {498 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val);499 500 if (val && !crtc) {501 drm_dbg_atomic(dev,502 "[PROP:%d:%s] cannot find CRTC with ID %llu\n",503 property->base.id, property->name, val);504 return -EACCES;505 }506 return drm_atomic_set_crtc_for_plane(state, crtc);507 } else if (property == config->prop_crtc_x) {508 state->crtc_x = U642I64(val);509 } else if (property == config->prop_crtc_y) {510 state->crtc_y = U642I64(val);511 } else if (property == config->prop_crtc_w) {512 state->crtc_w = val;513 } else if (property == config->prop_crtc_h) {514 state->crtc_h = val;515 } else if (property == config->prop_src_x) {516 state->src_x = val;517 } else if (property == config->prop_src_y) {518 state->src_y = val;519 } else if (property == config->prop_src_w) {520 state->src_w = val;521 } else if (property == config->prop_src_h) {522 state->src_h = val;523 } else if (property == plane->alpha_property) {524 state->alpha = val;525 } else if (property == plane->blend_mode_property) {526 state->pixel_blend_mode = val;527 } else if (property == plane->rotation_property) {528 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) {529 drm_dbg_atomic(plane->dev,530 "[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n",531 plane->base.id, plane->name, val);532 return -EINVAL;533 }534 state->rotation = val;535 } else if (property == plane->zpos_property) {536 state->zpos = val;537 } else if (property == plane->color_encoding_property) {538 state->color_encoding = val;539 } else if (property == plane->color_range_property) {540 state->color_range = val;541 } else if (property == config->prop_fb_damage_clips) {542 ret = drm_property_replace_blob_from_id(dev,543 &state->fb_damage_clips,544 val,545 -1,546 sizeof(struct drm_mode_rect),547 &replaced);548 return ret;549 } else if (property == plane->scaling_filter_property) {550 state->scaling_filter = val;551 } else if (plane->funcs->atomic_set_property) {552 return plane->funcs->atomic_set_property(plane, state,553 property, val);554 } else if (property == plane->hotspot_x_property) {555 if (plane->type != DRM_PLANE_TYPE_CURSOR) {556 drm_dbg_atomic(plane->dev,557 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n",558 plane->base.id, plane->name, val);559 return -EINVAL;560 }561 state->hotspot_x = val;562 } else if (property == plane->hotspot_y_property) {563 if (plane->type != DRM_PLANE_TYPE_CURSOR) {564 drm_dbg_atomic(plane->dev,565 "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n",566 plane->base.id, plane->name, val);567 return -EINVAL;568 }569 state->hotspot_y = val;570 } else {571 drm_dbg_atomic(plane->dev,572 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n",573 plane->base.id, plane->name,574 property->base.id, property->name);575 return -EINVAL;576 }577 578 return 0;579}580 581static int582drm_atomic_plane_get_property(struct drm_plane *plane,583 const struct drm_plane_state *state,584 struct drm_property *property, uint64_t *val)585{586 struct drm_device *dev = plane->dev;587 struct drm_mode_config *config = &dev->mode_config;588 589 if (property == config->prop_fb_id) {590 *val = (state->fb) ? state->fb->base.id : 0;591 } else if (property == config->prop_in_fence_fd) {592 *val = -1;593 } else if (property == config->prop_crtc_id) {594 *val = (state->crtc) ? state->crtc->base.id : 0;595 } else if (property == config->prop_crtc_x) {596 *val = I642U64(state->crtc_x);597 } else if (property == config->prop_crtc_y) {598 *val = I642U64(state->crtc_y);599 } else if (property == config->prop_crtc_w) {600 *val = state->crtc_w;601 } else if (property == config->prop_crtc_h) {602 *val = state->crtc_h;603 } else if (property == config->prop_src_x) {604 *val = state->src_x;605 } else if (property == config->prop_src_y) {606 *val = state->src_y;607 } else if (property == config->prop_src_w) {608 *val = state->src_w;609 } else if (property == config->prop_src_h) {610 *val = state->src_h;611 } else if (property == plane->alpha_property) {612 *val = state->alpha;613 } else if (property == plane->blend_mode_property) {614 *val = state->pixel_blend_mode;615 } else if (property == plane->rotation_property) {616 *val = state->rotation;617 } else if (property == plane->zpos_property) {618 *val = state->zpos;619 } else if (property == plane->color_encoding_property) {620 *val = state->color_encoding;621 } else if (property == plane->color_range_property) {622 *val = state->color_range;623 } else if (property == config->prop_fb_damage_clips) {624 *val = (state->fb_damage_clips) ?625 state->fb_damage_clips->base.id : 0;626 } else if (property == plane->scaling_filter_property) {627 *val = state->scaling_filter;628 } else if (plane->funcs->atomic_get_property) {629 return plane->funcs->atomic_get_property(plane, state, property, val);630 } else if (property == plane->hotspot_x_property) {631 *val = state->hotspot_x;632 } else if (property == plane->hotspot_y_property) {633 *val = state->hotspot_y;634 } else {635 drm_dbg_atomic(dev,636 "[PLANE:%d:%s] unknown property [PROP:%d:%s]\n",637 plane->base.id, plane->name,638 property->base.id, property->name);639 return -EINVAL;640 }641 642 return 0;643}644 645static int drm_atomic_set_writeback_fb_for_connector(646 struct drm_connector_state *conn_state,647 struct drm_framebuffer *fb)648{649 int ret;650 struct drm_connector *conn = conn_state->connector;651 652 ret = drm_writeback_set_fb(conn_state, fb);653 if (ret < 0)654 return ret;655 656 if (fb)657 drm_dbg_atomic(conn->dev,658 "Set [FB:%d] for connector state %p\n",659 fb->base.id, conn_state);660 else661 drm_dbg_atomic(conn->dev,662 "Set [NOFB] for connector state %p\n",663 conn_state);664 665 return 0;666}667 668static int drm_atomic_connector_set_property(struct drm_connector *connector,669 struct drm_connector_state *state, struct drm_file *file_priv,670 struct drm_property *property, uint64_t val)671{672 struct drm_device *dev = connector->dev;673 struct drm_mode_config *config = &dev->mode_config;674 bool replaced = false;675 int ret;676 677 if (property == config->prop_crtc_id) {678 struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val);679 680 if (val && !crtc) {681 drm_dbg_atomic(dev,682 "[PROP:%d:%s] cannot find CRTC with ID %llu\n",683 property->base.id, property->name, val);684 return -EACCES;685 }686 return drm_atomic_set_crtc_for_connector(state, crtc);687 } else if (property == config->dpms_property) {688 /* setting DPMS property requires special handling, which689 * is done in legacy setprop path for us. Disallow (for690 * now?) atomic writes to DPMS property:691 */692 drm_dbg_atomic(dev,693 "legacy [PROP:%d:%s] can only be set via legacy uAPI\n",694 property->base.id, property->name);695 return -EINVAL;696 } else if (property == config->tv_select_subconnector_property) {697 state->tv.select_subconnector = val;698 } else if (property == config->tv_subconnector_property) {699 state->tv.subconnector = val;700 } else if (property == config->tv_left_margin_property) {701 state->tv.margins.left = val;702 } else if (property == config->tv_right_margin_property) {703 state->tv.margins.right = val;704 } else if (property == config->tv_top_margin_property) {705 state->tv.margins.top = val;706 } else if (property == config->tv_bottom_margin_property) {707 state->tv.margins.bottom = val;708 } else if (property == config->legacy_tv_mode_property) {709 state->tv.legacy_mode = val;710 } else if (property == config->tv_mode_property) {711 state->tv.mode = val;712 } else if (property == config->tv_brightness_property) {713 state->tv.brightness = val;714 } else if (property == config->tv_contrast_property) {715 state->tv.contrast = val;716 } else if (property == config->tv_flicker_reduction_property) {717 state->tv.flicker_reduction = val;718 } else if (property == config->tv_overscan_property) {719 state->tv.overscan = val;720 } else if (property == config->tv_saturation_property) {721 state->tv.saturation = val;722 } else if (property == config->tv_hue_property) {723 state->tv.hue = val;724 } else if (property == config->link_status_property) {725 /* Never downgrade from GOOD to BAD on userspace's request here,726 * only hw issues can do that.727 *728 * For an atomic property the userspace doesn't need to be able729 * to understand all the properties, but needs to be able to730 * restore the state it wants on VT switch. So if the userspace731 * tries to change the link_status from GOOD to BAD, driver732 * silently rejects it and returns a 0. This prevents userspace733 * from accidentally breaking the display when it restores the734 * state.735 */736 if (state->link_status != DRM_LINK_STATUS_GOOD)737 state->link_status = val;738 } else if (property == config->hdr_output_metadata_property) {739 ret = drm_property_replace_blob_from_id(dev,740 &state->hdr_output_metadata,741 val,742 sizeof(struct hdr_output_metadata), -1,743 &replaced);744 return ret;745 } else if (property == config->aspect_ratio_property) {746 state->picture_aspect_ratio = val;747 } else if (property == config->content_type_property) {748 state->content_type = val;749 } else if (property == connector->scaling_mode_property) {750 state->scaling_mode = val;751 } else if (property == config->content_protection_property) {752 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {753 drm_dbg_kms(dev, "only drivers can set CP Enabled\n");754 return -EINVAL;755 }756 state->content_protection = val;757 } else if (property == config->hdcp_content_type_property) {758 state->hdcp_content_type = val;759 } else if (property == connector->colorspace_property) {760 state->colorspace = val;761 } else if (property == config->writeback_fb_id_property) {762 struct drm_framebuffer *fb;763 int ret;764 765 fb = drm_framebuffer_lookup(dev, file_priv, val);766 ret = drm_atomic_set_writeback_fb_for_connector(state, fb);767 if (fb)768 drm_framebuffer_put(fb);769 return ret;770 } else if (property == config->writeback_out_fence_ptr_property) {771 s32 __user *fence_ptr = u64_to_user_ptr(val);772 773 return set_out_fence_for_connector(state->state, connector,774 fence_ptr);775 } else if (property == connector->max_bpc_property) {776 state->max_requested_bpc = val;777 } else if (property == connector->privacy_screen_sw_state_property) {778 state->privacy_screen_sw_state = val;779 } else if (property == connector->broadcast_rgb_property) {780 state->hdmi.broadcast_rgb = val;781 } else if (connector->funcs->atomic_set_property) {782 return connector->funcs->atomic_set_property(connector,783 state, property, val);784 } else {785 drm_dbg_atomic(connector->dev,786 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n",787 connector->base.id, connector->name,788 property->base.id, property->name);789 return -EINVAL;790 }791 792 return 0;793}794 795static int796drm_atomic_connector_get_property(struct drm_connector *connector,797 const struct drm_connector_state *state,798 struct drm_property *property, uint64_t *val)799{800 struct drm_device *dev = connector->dev;801 struct drm_mode_config *config = &dev->mode_config;802 803 if (property == config->prop_crtc_id) {804 *val = (state->crtc) ? state->crtc->base.id : 0;805 } else if (property == config->dpms_property) {806 if (state->crtc && state->crtc->state->self_refresh_active)807 *val = DRM_MODE_DPMS_ON;808 else809 *val = connector->dpms;810 } else if (property == config->tv_select_subconnector_property) {811 *val = state->tv.select_subconnector;812 } else if (property == config->tv_subconnector_property) {813 *val = state->tv.subconnector;814 } else if (property == config->tv_left_margin_property) {815 *val = state->tv.margins.left;816 } else if (property == config->tv_right_margin_property) {817 *val = state->tv.margins.right;818 } else if (property == config->tv_top_margin_property) {819 *val = state->tv.margins.top;820 } else if (property == config->tv_bottom_margin_property) {821 *val = state->tv.margins.bottom;822 } else if (property == config->legacy_tv_mode_property) {823 *val = state->tv.legacy_mode;824 } else if (property == config->tv_mode_property) {825 *val = state->tv.mode;826 } else if (property == config->tv_brightness_property) {827 *val = state->tv.brightness;828 } else if (property == config->tv_contrast_property) {829 *val = state->tv.contrast;830 } else if (property == config->tv_flicker_reduction_property) {831 *val = state->tv.flicker_reduction;832 } else if (property == config->tv_overscan_property) {833 *val = state->tv.overscan;834 } else if (property == config->tv_saturation_property) {835 *val = state->tv.saturation;836 } else if (property == config->tv_hue_property) {837 *val = state->tv.hue;838 } else if (property == config->link_status_property) {839 *val = state->link_status;840 } else if (property == config->aspect_ratio_property) {841 *val = state->picture_aspect_ratio;842 } else if (property == config->content_type_property) {843 *val = state->content_type;844 } else if (property == connector->colorspace_property) {845 *val = state->colorspace;846 } else if (property == connector->scaling_mode_property) {847 *val = state->scaling_mode;848 } else if (property == config->hdr_output_metadata_property) {849 *val = state->hdr_output_metadata ?850 state->hdr_output_metadata->base.id : 0;851 } else if (property == config->content_protection_property) {852 *val = state->content_protection;853 } else if (property == config->hdcp_content_type_property) {854 *val = state->hdcp_content_type;855 } else if (property == config->writeback_fb_id_property) {856 /* Writeback framebuffer is one-shot, write and forget */857 *val = 0;858 } else if (property == config->writeback_out_fence_ptr_property) {859 *val = 0;860 } else if (property == connector->max_bpc_property) {861 *val = state->max_requested_bpc;862 } else if (property == connector->privacy_screen_sw_state_property) {863 *val = state->privacy_screen_sw_state;864 } else if (property == connector->broadcast_rgb_property) {865 *val = state->hdmi.broadcast_rgb;866 } else if (connector->funcs->atomic_get_property) {867 return connector->funcs->atomic_get_property(connector,868 state, property, val);869 } else {870 drm_dbg_atomic(dev,871 "[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]\n",872 connector->base.id, connector->name,873 property->base.id, property->name);874 return -EINVAL;875 }876 877 return 0;878}879 880int drm_atomic_get_property(struct drm_mode_object *obj,881 struct drm_property *property, uint64_t *val)882{883 struct drm_device *dev = property->dev;884 int ret;885 886 switch (obj->type) {887 case DRM_MODE_OBJECT_CONNECTOR: {888 struct drm_connector *connector = obj_to_connector(obj);889 890 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));891 ret = drm_atomic_connector_get_property(connector,892 connector->state, property, val);893 break;894 }895 case DRM_MODE_OBJECT_CRTC: {896 struct drm_crtc *crtc = obj_to_crtc(obj);897 898 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));899 ret = drm_atomic_crtc_get_property(crtc,900 crtc->state, property, val);901 break;902 }903 case DRM_MODE_OBJECT_PLANE: {904 struct drm_plane *plane = obj_to_plane(obj);905 906 WARN_ON(!drm_modeset_is_locked(&plane->mutex));907 ret = drm_atomic_plane_get_property(plane,908 plane->state, property, val);909 break;910 }911 default:912 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties\n", obj->id);913 ret = -EINVAL;914 break;915 }916 917 return ret;918}919 920/*921 * The big monster ioctl922 */923 924static struct drm_pending_vblank_event *create_vblank_event(925 struct drm_crtc *crtc, uint64_t user_data)926{927 struct drm_pending_vblank_event *e = NULL;928 929 e = kzalloc(sizeof *e, GFP_KERNEL);930 if (!e)931 return NULL;932 933 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;934 e->event.base.length = sizeof(e->event);935 e->event.vbl.crtc_id = crtc->base.id;936 e->event.vbl.user_data = user_data;937 938 return e;939}940 941int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,942 struct drm_connector *connector,943 int mode)944{945 struct drm_connector *tmp_connector;946 struct drm_connector_state *new_conn_state;947 struct drm_crtc *crtc;948 struct drm_crtc_state *crtc_state;949 int i, ret, old_mode = connector->dpms;950 bool active = false;951 952 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,953 state->acquire_ctx);954 if (ret)955 return ret;956 957 if (mode != DRM_MODE_DPMS_ON)958 mode = DRM_MODE_DPMS_OFF;959 connector->dpms = mode;960 961 crtc = connector->state->crtc;962 if (!crtc)963 goto out;964 ret = drm_atomic_add_affected_connectors(state, crtc);965 if (ret)966 goto out;967 968 crtc_state = drm_atomic_get_crtc_state(state, crtc);969 if (IS_ERR(crtc_state)) {970 ret = PTR_ERR(crtc_state);971 goto out;972 }973 974 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {975 if (new_conn_state->crtc != crtc)976 continue;977 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {978 active = true;979 break;980 }981 }982 983 crtc_state->active = active;984 ret = drm_atomic_commit(state);985out:986 if (ret != 0)987 connector->dpms = old_mode;988 return ret;989}990 991static int drm_atomic_check_prop_changes(int ret, uint64_t old_val, uint64_t prop_value,992 struct drm_property *prop)993{994 if (ret != 0 || old_val != prop_value) {995 drm_dbg_atomic(prop->dev,996 "[PROP:%d:%s] No prop can be changed during async flip\n",997 prop->base.id, prop->name);998 return -EINVAL;999 }1000 1001 return 0;1002}1003 1004int drm_atomic_set_property(struct drm_atomic_state *state,1005 struct drm_file *file_priv,1006 struct drm_mode_object *obj,1007 struct drm_property *prop,1008 u64 prop_value,1009 bool async_flip)1010{1011 struct drm_mode_object *ref;1012 u64 old_val;1013 int ret;1014 1015 if (!drm_property_change_valid_get(prop, prop_value, &ref))1016 return -EINVAL;1017 1018 switch (obj->type) {1019 case DRM_MODE_OBJECT_CONNECTOR: {1020 struct drm_connector *connector = obj_to_connector(obj);1021 struct drm_connector_state *connector_state;1022 1023 connector_state = drm_atomic_get_connector_state(state, connector);1024 if (IS_ERR(connector_state)) {1025 ret = PTR_ERR(connector_state);1026 break;1027 }1028 1029 if (async_flip) {1030 ret = drm_atomic_connector_get_property(connector, connector_state,1031 prop, &old_val);1032 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop);1033 break;1034 }1035 1036 ret = drm_atomic_connector_set_property(connector,1037 connector_state, file_priv,1038 prop, prop_value);1039 break;1040 }1041 case DRM_MODE_OBJECT_CRTC: {1042 struct drm_crtc *crtc = obj_to_crtc(obj);1043 struct drm_crtc_state *crtc_state;1044 1045 crtc_state = drm_atomic_get_crtc_state(state, crtc);1046 if (IS_ERR(crtc_state)) {1047 ret = PTR_ERR(crtc_state);1048 break;1049 }1050 1051 if (async_flip) {1052 ret = drm_atomic_crtc_get_property(crtc, crtc_state,1053 prop, &old_val);1054 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop);1055 break;1056 }1057 1058 ret = drm_atomic_crtc_set_property(crtc,1059 crtc_state, prop, prop_value);1060 break;1061 }1062 case DRM_MODE_OBJECT_PLANE: {1063 struct drm_plane *plane = obj_to_plane(obj);1064 struct drm_plane_state *plane_state;1065 struct drm_mode_config *config = &plane->dev->mode_config;1066 1067 plane_state = drm_atomic_get_plane_state(state, plane);1068 if (IS_ERR(plane_state)) {1069 ret = PTR_ERR(plane_state);1070 break;1071 }1072 1073 if (async_flip &&1074 (plane_state->plane->type != DRM_PLANE_TYPE_PRIMARY ||1075 (prop != config->prop_fb_id &&1076 prop != config->prop_in_fence_fd &&1077 prop != config->prop_fb_damage_clips))) {1078 ret = drm_atomic_plane_get_property(plane, plane_state,1079 prop, &old_val);1080 ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop);1081 break;1082 }1083 1084 ret = drm_atomic_plane_set_property(plane,1085 plane_state, file_priv,1086 prop, prop_value);1087 break;1088 }1089 default:1090 drm_dbg_atomic(prop->dev, "[OBJECT:%d] has no properties\n", obj->id);1091 ret = -EINVAL;1092 break;1093 }1094 1095 drm_property_change_valid_put(prop, ref);1096 return ret;1097}1098 1099/**1100 * DOC: explicit fencing properties1101 *1102 * Explicit fencing allows userspace to control the buffer synchronization1103 * between devices. A Fence or a group of fences are transferred to/from1104 * userspace using Sync File fds and there are two DRM properties for that.1105 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and1106 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.1107 *1108 * As a contrast, with implicit fencing the kernel keeps track of any1109 * ongoing rendering, and automatically ensures that the atomic update waits1110 * for any pending rendering to complete. This is usually tracked in &struct1111 * dma_resv which can also contain mandatory kernel fences. Implicit syncing1112 * is how Linux traditionally worked (e.g. DRI2/3 on X.org), whereas explicit1113 * fencing is what Android wants.1114 *1115 * "IN_FENCE_FD”:1116 * Use this property to pass a fence that DRM should wait on before1117 * proceeding with the Atomic Commit request and show the framebuffer for1118 * the plane on the screen. The fence can be either a normal fence or a1119 * merged one, the sync_file framework will handle both cases and use a1120 * fence_array if a merged fence is received. Passing -1 here means no1121 * fences to wait on.1122 *1123 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag1124 * it will only check if the Sync File is a valid one.1125 *1126 * On the driver side the fence is stored on the @fence parameter of1127 * &struct drm_plane_state. Drivers which also support implicit fencing1128 * should extract the implicit fence using drm_gem_plane_helper_prepare_fb(),1129 * to make sure there's consistent behaviour between drivers in precedence1130 * of implicit vs. explicit fencing.1131 *1132 * "OUT_FENCE_PTR”:1133 * Use this property to pass a file descriptor pointer to DRM. Once the1134 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with1135 * the file descriptor number of a Sync File. This Sync File contains the1136 * CRTC fence that will be signaled when all framebuffers present on the1137 * Atomic Commit * request for that given CRTC are scanned out on the1138 * screen.1139 *1140 * The Atomic Commit request fails if a invalid pointer is passed. If the1141 * Atomic Commit request fails for any other reason the out fence fd1142 * returned will be -1. On a Atomic Commit with the1143 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.1144 *1145 * Note that out-fences don't have a special interface to drivers and are1146 * internally represented by a &struct drm_pending_vblank_event in struct1147 * &drm_crtc_state, which is also used by the nonblocking atomic commit1148 * helpers and for the DRM event handling for existing userspace.1149 */1150 1151struct drm_out_fence_state {1152 s32 __user *out_fence_ptr;1153 struct sync_file *sync_file;1154 int fd;1155};1156 1157static int setup_out_fence(struct drm_out_fence_state *fence_state,1158 struct dma_fence *fence)1159{1160 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);1161 if (fence_state->fd < 0)1162 return fence_state->fd;1163 1164 if (put_user(fence_state->fd, fence_state->out_fence_ptr))1165 return -EFAULT;1166 1167 fence_state->sync_file = sync_file_create(fence);1168 if (!fence_state->sync_file)1169 return -ENOMEM;1170 1171 return 0;1172}1173 1174static int prepare_signaling(struct drm_device *dev,1175 struct drm_atomic_state *state,1176 struct drm_mode_atomic *arg,1177 struct drm_file *file_priv,1178 struct drm_out_fence_state **fence_state,1179 unsigned int *num_fences)1180{1181 struct drm_crtc *crtc;1182 struct drm_crtc_state *crtc_state;1183 struct drm_connector *conn;1184 struct drm_connector_state *conn_state;1185 int i, c = 0, ret;1186 1187 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)1188 return 0;1189 1190 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {1191 s32 __user *fence_ptr;1192 1193 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);1194 1195 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {1196 struct drm_pending_vblank_event *e;1197 1198 e = create_vblank_event(crtc, arg->user_data);1199 if (!e)1200 return -ENOMEM;1201 1202 crtc_state->event = e;1203 }1204 1205 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {1206 struct drm_pending_vblank_event *e = crtc_state->event;1207 1208 if (!file_priv)1209 continue;1210 1211 ret = drm_event_reserve_init(dev, file_priv, &e->base,1212 &e->event.base);1213 if (ret) {1214 kfree(e);1215 crtc_state->event = NULL;1216 return ret;1217 }1218 }1219 1220 if (fence_ptr) {1221 struct dma_fence *fence;1222 struct drm_out_fence_state *f;1223 1224 f = krealloc(*fence_state, sizeof(**fence_state) *1225 (*num_fences + 1), GFP_KERNEL);1226 if (!f)1227 return -ENOMEM;1228 1229 memset(&f[*num_fences], 0, sizeof(*f));1230 1231 f[*num_fences].out_fence_ptr = fence_ptr;1232 *fence_state = f;1233 1234 fence = drm_crtc_create_fence(crtc);1235 if (!fence)1236 return -ENOMEM;1237 1238 ret = setup_out_fence(&f[(*num_fences)++], fence);1239 if (ret) {1240 dma_fence_put(fence);1241 return ret;1242 }1243 1244 crtc_state->event->base.fence = fence;1245 }1246 1247 c++;1248 }1249 1250 for_each_new_connector_in_state(state, conn, conn_state, i) {1251 struct drm_writeback_connector *wb_conn;1252 struct drm_out_fence_state *f;1253 struct dma_fence *fence;1254 s32 __user *fence_ptr;1255 1256 if (!conn_state->writeback_job)1257 continue;1258 1259 fence_ptr = get_out_fence_for_connector(state, conn);1260 if (!fence_ptr)1261 continue;1262 1263 f = krealloc(*fence_state, sizeof(**fence_state) *1264 (*num_fences + 1), GFP_KERNEL);1265 if (!f)1266 return -ENOMEM;1267 1268 memset(&f[*num_fences], 0, sizeof(*f));1269 1270 f[*num_fences].out_fence_ptr = fence_ptr;1271 *fence_state = f;1272 1273 wb_conn = drm_connector_to_writeback(conn);1274 fence = drm_writeback_get_out_fence(wb_conn);1275 if (!fence)1276 return -ENOMEM;1277 1278 ret = setup_out_fence(&f[(*num_fences)++], fence);1279 if (ret) {1280 dma_fence_put(fence);1281 return ret;1282 }1283 1284 conn_state->writeback_job->out_fence = fence;1285 }1286 1287 /*1288 * Having this flag means user mode pends on event which will never1289 * reach due to lack of at least one CRTC for signaling1290 */1291 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) {1292 drm_dbg_atomic(dev, "need at least one CRTC for DRM_MODE_PAGE_FLIP_EVENT");1293 return -EINVAL;1294 }1295 1296 return 0;1297}1298 1299static void complete_signaling(struct drm_device *dev,1300 struct drm_atomic_state *state,1301 struct drm_out_fence_state *fence_state,1302 unsigned int num_fences,1303 bool install_fds)1304{1305 struct drm_crtc *crtc;1306 struct drm_crtc_state *crtc_state;1307 int i;1308 1309 if (install_fds) {1310 for (i = 0; i < num_fences; i++)1311 fd_install(fence_state[i].fd,1312 fence_state[i].sync_file->file);1313 1314 kfree(fence_state);1315 return;1316 }1317 1318 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {1319 struct drm_pending_vblank_event *event = crtc_state->event;1320 /*1321 * Free the allocated event. drm_atomic_helper_setup_commit1322 * can allocate an event too, so only free it if it's ours1323 * to prevent a double free in drm_atomic_state_clear.1324 */1325 if (event && (event->base.fence || event->base.file_priv)) {1326 drm_event_cancel_free(dev, &event->base);1327 crtc_state->event = NULL;1328 }1329 }1330 1331 if (!fence_state)1332 return;1333 1334 for (i = 0; i < num_fences; i++) {1335 if (fence_state[i].sync_file)1336 fput(fence_state[i].sync_file->file);1337 if (fence_state[i].fd >= 0)1338 put_unused_fd(fence_state[i].fd);1339 1340 /* If this fails log error to the user */1341 if (fence_state[i].out_fence_ptr &&1342 put_user(-1, fence_state[i].out_fence_ptr))1343 drm_dbg_atomic(dev, "Couldn't clear out_fence_ptr\n");1344 }1345 1346 kfree(fence_state);1347}1348 1349static void1350set_async_flip(struct drm_atomic_state *state)1351{1352 struct drm_crtc *crtc;1353 struct drm_crtc_state *crtc_state;1354 int i;1355 1356 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {1357 crtc_state->async_flip = true;1358 }1359}1360 1361int drm_mode_atomic_ioctl(struct drm_device *dev,1362 void *data, struct drm_file *file_priv)1363{1364 struct drm_mode_atomic *arg = data;1365 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);1366 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);1367 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);1368 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);1369 unsigned int copied_objs, copied_props;1370 struct drm_atomic_state *state;1371 struct drm_modeset_acquire_ctx ctx;1372 struct drm_out_fence_state *fence_state;1373 int ret = 0;1374 unsigned int i, j, num_fences;1375 bool async_flip = false;1376 1377 /* disallow for drivers not supporting atomic: */1378 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))1379 return -EOPNOTSUPP;1380 1381 /* disallow for userspace that has not enabled atomic cap (even1382 * though this may be a bit overkill, since legacy userspace1383 * wouldn't know how to call this ioctl)1384 */1385 if (!file_priv->atomic) {1386 drm_dbg_atomic(dev,1387 "commit failed: atomic cap not enabled\n");1388 return -EINVAL;1389 }1390 1391 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) {1392 drm_dbg_atomic(dev, "commit failed: invalid flag\n");1393 return -EINVAL;1394 }1395 1396 if (arg->reserved) {1397 drm_dbg_atomic(dev, "commit failed: reserved field set\n");1398 return -EINVAL;1399 }1400 1401 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) {1402 if (!dev->mode_config.async_page_flip) {1403 drm_dbg_atomic(dev,1404 "commit failed: DRM_MODE_PAGE_FLIP_ASYNC not supported\n");1405 return -EINVAL;1406 }1407 1408 async_flip = true;1409 }1410 1411 /* can't test and expect an event at the same time. */1412 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&1413 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) {1414 drm_dbg_atomic(dev,1415 "commit failed: page-flip event requested with test-only commit\n");1416 return -EINVAL;1417 }1418 1419 state = drm_atomic_state_alloc(dev);1420 if (!state)1421 return -ENOMEM;1422 1423 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);1424 state->acquire_ctx = &ctx;1425 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);1426 1427retry:1428 copied_objs = 0;1429 copied_props = 0;1430 fence_state = NULL;1431 num_fences = 0;1432 1433 for (i = 0; i < arg->count_objs; i++) {1434 uint32_t obj_id, count_props;1435 struct drm_mode_object *obj;1436 1437 if (get_user(obj_id, objs_ptr + copied_objs)) {1438 ret = -EFAULT;1439 goto out;1440 }1441 1442 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);1443 if (!obj) {1444 drm_dbg_atomic(dev, "cannot find object ID %d", obj_id);1445 ret = -ENOENT;1446 goto out;1447 }1448 1449 if (!obj->properties) {1450 drm_dbg_atomic(dev, "[OBJECT:%d] has no properties", obj_id);1451 drm_mode_object_put(obj);1452 ret = -ENOENT;1453 goto out;1454 }1455 1456 if (get_user(count_props, count_props_ptr + copied_objs)) {1457 drm_mode_object_put(obj);1458 ret = -EFAULT;1459 goto out;1460 }1461 1462 copied_objs++;1463 1464 for (j = 0; j < count_props; j++) {1465 uint32_t prop_id;1466 uint64_t prop_value;1467 struct drm_property *prop;1468 1469 if (get_user(prop_id, props_ptr + copied_props)) {1470 drm_mode_object_put(obj);1471 ret = -EFAULT;1472 goto out;1473 }1474 1475 prop = drm_mode_obj_find_prop_id(obj, prop_id);1476 if (!prop) {1477 drm_dbg_atomic(dev,1478 "[OBJECT:%d] cannot find property ID %d",1479 obj_id, prop_id);1480 drm_mode_object_put(obj);1481 ret = -ENOENT;1482 goto out;1483 }1484 1485 if (copy_from_user(&prop_value,1486 prop_values_ptr + copied_props,1487 sizeof(prop_value))) {1488 drm_mode_object_put(obj);1489 ret = -EFAULT;1490 goto out;1491 }1492 1493 ret = drm_atomic_set_property(state, file_priv, obj,1494 prop, prop_value, async_flip);1495 if (ret) {1496 drm_mode_object_put(obj);1497 goto out;1498 }1499 1500 copied_props++;1501 }1502 1503 drm_mode_object_put(obj);1504 }1505 1506 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state,1507 &num_fences);1508 if (ret)1509 goto out;1510 1511 if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC)1512 set_async_flip(state);1513 1514 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {1515 ret = drm_atomic_check_only(state);1516 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {1517 ret = drm_atomic_nonblocking_commit(state);1518 } else {1519 ret = drm_atomic_commit(state);1520 }1521 1522out:1523 complete_signaling(dev, state, fence_state, num_fences, !ret);1524 1525 if (ret == -EDEADLK) {1526 drm_atomic_state_clear(state);1527 ret = drm_modeset_backoff(&ctx);1528 if (!ret)1529 goto retry;1530 }1531 1532 drm_atomic_state_put(state);1533 1534 drm_modeset_drop_locks(&ctx);1535 drm_modeset_acquire_fini(&ctx);1536 1537 return ret;1538}1539