1862 lines · c
1/*2 * Copyright (C) 2014 Red Hat3 * Copyright (C) 2014 Intel Corp.4 * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.5 *6 * Permission is hereby granted, free of charge, to any person obtaining a7 * copy of this software and associated documentation files (the "Software"),8 * to deal in the Software without restriction, including without limitation9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,10 * and/or sell copies of the Software, and to permit persons to whom the11 * Software is furnished to do so, subject to the following conditions:12 *13 * The above copyright notice and this permission notice shall be included in14 * all copies or substantial portions of the Software.15 *16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR22 * OTHER DEALINGS IN THE SOFTWARE.23 *24 * Authors:25 * Rob Clark <robdclark@gmail.com>26 * Daniel Vetter <daniel.vetter@ffwll.ch>27 */28 29 30#include <linux/sync_file.h>31 32#include <drm/drm_atomic.h>33#include <drm/drm_atomic_uapi.h>34#include <drm/drm_blend.h>35#include <drm/drm_bridge.h>36#include <drm/drm_debugfs.h>37#include <drm/drm_device.h>38#include <drm/drm_drv.h>39#include <drm/drm_file.h>40#include <drm/drm_fourcc.h>41#include <drm/drm_framebuffer.h>42#include <drm/drm_mode.h>43#include <drm/drm_print.h>44#include <drm/drm_writeback.h>45 46#include "drm_crtc_internal.h"47#include "drm_internal.h"48 49void __drm_crtc_commit_free(struct kref *kref)50{51 struct drm_crtc_commit *commit =52 container_of(kref, struct drm_crtc_commit, ref);53 54 kfree(commit);55}56EXPORT_SYMBOL(__drm_crtc_commit_free);57 58/**59 * drm_crtc_commit_wait - Waits for a commit to complete60 * @commit: &drm_crtc_commit to wait for61 *62 * Waits for a given &drm_crtc_commit to be programmed into the63 * hardware and flipped to.64 *65 * Returns:66 * 0 on success, a negative error code otherwise.67 */68int drm_crtc_commit_wait(struct drm_crtc_commit *commit)69{70 unsigned long timeout = 10 * HZ;71 int ret;72 73 if (!commit)74 return 0;75 76 ret = wait_for_completion_timeout(&commit->hw_done, timeout);77 if (!ret) {78 drm_err(commit->crtc->dev, "hw_done timed out\n");79 return -ETIMEDOUT;80 }81 82 /*83 * Currently no support for overwriting flips, hence84 * stall for previous one to execute completely.85 */86 ret = wait_for_completion_timeout(&commit->flip_done, timeout);87 if (!ret) {88 drm_err(commit->crtc->dev, "flip_done timed out\n");89 return -ETIMEDOUT;90 }91 92 return 0;93}94EXPORT_SYMBOL(drm_crtc_commit_wait);95 96/**97 * drm_atomic_state_default_release -98 * release memory initialized by drm_atomic_state_init99 * @state: atomic state100 *101 * Free all the memory allocated by drm_atomic_state_init.102 * This should only be used by drivers which are still subclassing103 * &drm_atomic_state and haven't switched to &drm_private_state yet.104 */105void drm_atomic_state_default_release(struct drm_atomic_state *state)106{107 kfree(state->connectors);108 kfree(state->crtcs);109 kfree(state->planes);110 kfree(state->private_objs);111}112EXPORT_SYMBOL(drm_atomic_state_default_release);113 114/**115 * drm_atomic_state_init - init new atomic state116 * @dev: DRM device117 * @state: atomic state118 *119 * Default implementation for filling in a new atomic state.120 * This should only be used by drivers which are still subclassing121 * &drm_atomic_state and haven't switched to &drm_private_state yet.122 */123int124drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)125{126 kref_init(&state->ref);127 128 /* TODO legacy paths should maybe do a better job about129 * setting this appropriately?130 */131 state->allow_modeset = true;132 133 state->crtcs = kcalloc(dev->mode_config.num_crtc,134 sizeof(*state->crtcs), GFP_KERNEL);135 if (!state->crtcs)136 goto fail;137 state->planes = kcalloc(dev->mode_config.num_total_plane,138 sizeof(*state->planes), GFP_KERNEL);139 if (!state->planes)140 goto fail;141 142 /*143 * Because drm_atomic_state can be committed asynchronously we need our144 * own reference and cannot rely on the on implied by drm_file in the145 * ioctl call.146 */147 drm_dev_get(dev);148 state->dev = dev;149 150 drm_dbg_atomic(dev, "Allocated atomic state %p\n", state);151 152 return 0;153fail:154 drm_atomic_state_default_release(state);155 return -ENOMEM;156}157EXPORT_SYMBOL(drm_atomic_state_init);158 159/**160 * drm_atomic_state_alloc - allocate atomic state161 * @dev: DRM device162 *163 * This allocates an empty atomic state to track updates.164 */165struct drm_atomic_state *166drm_atomic_state_alloc(struct drm_device *dev)167{168 struct drm_mode_config *config = &dev->mode_config;169 170 if (!config->funcs->atomic_state_alloc) {171 struct drm_atomic_state *state;172 173 state = kzalloc(sizeof(*state), GFP_KERNEL);174 if (!state)175 return NULL;176 if (drm_atomic_state_init(dev, state) < 0) {177 kfree(state);178 return NULL;179 }180 return state;181 }182 183 return config->funcs->atomic_state_alloc(dev);184}185EXPORT_SYMBOL(drm_atomic_state_alloc);186 187/**188 * drm_atomic_state_default_clear - clear base atomic state189 * @state: atomic state190 *191 * Default implementation for clearing atomic state.192 * This should only be used by drivers which are still subclassing193 * &drm_atomic_state and haven't switched to &drm_private_state yet.194 */195void drm_atomic_state_default_clear(struct drm_atomic_state *state)196{197 struct drm_device *dev = state->dev;198 struct drm_mode_config *config = &dev->mode_config;199 int i;200 201 drm_dbg_atomic(dev, "Clearing atomic state %p\n", state);202 203 for (i = 0; i < state->num_connector; i++) {204 struct drm_connector *connector = state->connectors[i].ptr;205 206 if (!connector)207 continue;208 209 connector->funcs->atomic_destroy_state(connector,210 state->connectors[i].state);211 state->connectors[i].ptr = NULL;212 state->connectors[i].state = NULL;213 state->connectors[i].old_state = NULL;214 state->connectors[i].new_state = NULL;215 drm_connector_put(connector);216 }217 218 for (i = 0; i < config->num_crtc; i++) {219 struct drm_crtc *crtc = state->crtcs[i].ptr;220 221 if (!crtc)222 continue;223 224 crtc->funcs->atomic_destroy_state(crtc,225 state->crtcs[i].state);226 227 state->crtcs[i].ptr = NULL;228 state->crtcs[i].state = NULL;229 state->crtcs[i].old_state = NULL;230 state->crtcs[i].new_state = NULL;231 232 if (state->crtcs[i].commit) {233 drm_crtc_commit_put(state->crtcs[i].commit);234 state->crtcs[i].commit = NULL;235 }236 }237 238 for (i = 0; i < config->num_total_plane; i++) {239 struct drm_plane *plane = state->planes[i].ptr;240 241 if (!plane)242 continue;243 244 plane->funcs->atomic_destroy_state(plane,245 state->planes[i].state);246 state->planes[i].ptr = NULL;247 state->planes[i].state = NULL;248 state->planes[i].old_state = NULL;249 state->planes[i].new_state = NULL;250 }251 252 for (i = 0; i < state->num_private_objs; i++) {253 struct drm_private_obj *obj = state->private_objs[i].ptr;254 255 obj->funcs->atomic_destroy_state(obj,256 state->private_objs[i].state);257 state->private_objs[i].ptr = NULL;258 state->private_objs[i].state = NULL;259 state->private_objs[i].old_state = NULL;260 state->private_objs[i].new_state = NULL;261 }262 state->num_private_objs = 0;263 264 if (state->fake_commit) {265 drm_crtc_commit_put(state->fake_commit);266 state->fake_commit = NULL;267 }268}269EXPORT_SYMBOL(drm_atomic_state_default_clear);270 271/**272 * drm_atomic_state_clear - clear state object273 * @state: atomic state274 *275 * When the w/w mutex algorithm detects a deadlock we need to back off and drop276 * all locks. So someone else could sneak in and change the current modeset277 * configuration. Which means that all the state assembled in @state is no278 * longer an atomic update to the current state, but to some arbitrary earlier279 * state. Which could break assumptions the driver's280 * &drm_mode_config_funcs.atomic_check likely relies on.281 *282 * Hence we must clear all cached state and completely start over, using this283 * function.284 */285void drm_atomic_state_clear(struct drm_atomic_state *state)286{287 struct drm_device *dev = state->dev;288 struct drm_mode_config *config = &dev->mode_config;289 290 if (config->funcs->atomic_state_clear)291 config->funcs->atomic_state_clear(state);292 else293 drm_atomic_state_default_clear(state);294}295EXPORT_SYMBOL(drm_atomic_state_clear);296 297/**298 * __drm_atomic_state_free - free all memory for an atomic state299 * @ref: This atomic state to deallocate300 *301 * This frees all memory associated with an atomic state, including all the302 * per-object state for planes, CRTCs and connectors.303 */304void __drm_atomic_state_free(struct kref *ref)305{306 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);307 struct drm_device *dev = state->dev;308 struct drm_mode_config *config = &dev->mode_config;309 310 drm_atomic_state_clear(state);311 312 drm_dbg_atomic(state->dev, "Freeing atomic state %p\n", state);313 314 if (config->funcs->atomic_state_free) {315 config->funcs->atomic_state_free(state);316 } else {317 drm_atomic_state_default_release(state);318 kfree(state);319 }320 321 drm_dev_put(dev);322}323EXPORT_SYMBOL(__drm_atomic_state_free);324 325/**326 * drm_atomic_get_crtc_state - get CRTC state327 * @state: global atomic state object328 * @crtc: CRTC to get state object for329 *330 * This function returns the CRTC state for the given CRTC, allocating it if331 * needed. It will also grab the relevant CRTC lock to make sure that the state332 * is consistent.333 *334 * WARNING: Drivers may only add new CRTC states to a @state if335 * drm_atomic_state.allow_modeset is set, or if it's a driver-internal commit336 * not created by userspace through an IOCTL call.337 *338 * Returns:339 * Either the allocated state or the error code encoded into the pointer. When340 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the341 * entire atomic sequence must be restarted. All other errors are fatal.342 */343struct drm_crtc_state *344drm_atomic_get_crtc_state(struct drm_atomic_state *state,345 struct drm_crtc *crtc)346{347 int ret, index = drm_crtc_index(crtc);348 struct drm_crtc_state *crtc_state;349 350 WARN_ON(!state->acquire_ctx);351 352 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);353 if (crtc_state)354 return crtc_state;355 356 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);357 if (ret)358 return ERR_PTR(ret);359 360 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);361 if (!crtc_state)362 return ERR_PTR(-ENOMEM);363 364 state->crtcs[index].state = crtc_state;365 state->crtcs[index].old_state = crtc->state;366 state->crtcs[index].new_state = crtc_state;367 state->crtcs[index].ptr = crtc;368 crtc_state->state = state;369 370 drm_dbg_atomic(state->dev, "Added [CRTC:%d:%s] %p state to %p\n",371 crtc->base.id, crtc->name, crtc_state, state);372 373 return crtc_state;374}375EXPORT_SYMBOL(drm_atomic_get_crtc_state);376 377static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,378 const struct drm_crtc_state *new_crtc_state)379{380 struct drm_crtc *crtc = new_crtc_state->crtc;381 382 /* NOTE: we explicitly don't enforce constraints such as primary383 * layer covering entire screen, since that is something we want384 * to allow (on hw that supports it). For hw that does not, it385 * should be checked in driver's crtc->atomic_check() vfunc.386 *387 * TODO: Add generic modeset state checks once we support those.388 */389 390 if (new_crtc_state->active && !new_crtc_state->enable) {391 drm_dbg_atomic(crtc->dev,392 "[CRTC:%d:%s] active without enabled\n",393 crtc->base.id, crtc->name);394 return -EINVAL;395 }396 397 /* The state->enable vs. state->mode_blob checks can be WARN_ON,398 * as this is a kernel-internal detail that userspace should never399 * be able to trigger.400 */401 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&402 WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {403 drm_dbg_atomic(crtc->dev,404 "[CRTC:%d:%s] enabled without mode blob\n",405 crtc->base.id, crtc->name);406 return -EINVAL;407 }408 409 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&410 WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {411 drm_dbg_atomic(crtc->dev,412 "[CRTC:%d:%s] disabled with mode blob\n",413 crtc->base.id, crtc->name);414 return -EINVAL;415 }416 417 /*418 * Reject event generation for when a CRTC is off and stays off.419 * It wouldn't be hard to implement this, but userspace has a track420 * record of happily burning through 100% cpu (or worse, crash) when the421 * display pipe is suspended. To avoid all that fun just reject updates422 * that ask for events since likely that indicates a bug in the423 * compositor's drawing loop. This is consistent with the vblank IOCTL424 * and legacy page_flip IOCTL which also reject service on a disabled425 * pipe.426 */427 if (new_crtc_state->event &&428 !new_crtc_state->active && !old_crtc_state->active) {429 drm_dbg_atomic(crtc->dev,430 "[CRTC:%d:%s] requesting event but off\n",431 crtc->base.id, crtc->name);432 return -EINVAL;433 }434 435 return 0;436}437 438static void drm_atomic_crtc_print_state(struct drm_printer *p,439 const struct drm_crtc_state *state)440{441 struct drm_crtc *crtc = state->crtc;442 443 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);444 drm_printf(p, "\tenable=%d\n", state->enable);445 drm_printf(p, "\tactive=%d\n", state->active);446 drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active);447 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);448 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);449 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);450 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);451 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);452 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);453 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);454 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);455 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));456 457 if (crtc->funcs->atomic_print_state)458 crtc->funcs->atomic_print_state(p, state);459}460 461static int drm_atomic_connector_check(struct drm_connector *connector,462 struct drm_connector_state *state)463{464 struct drm_crtc_state *crtc_state;465 struct drm_writeback_job *writeback_job = state->writeback_job;466 const struct drm_display_info *info = &connector->display_info;467 468 state->max_bpc = info->bpc ? info->bpc : 8;469 if (connector->max_bpc_property)470 state->max_bpc = min(state->max_bpc, state->max_requested_bpc);471 472 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)473 return 0;474 475 if (writeback_job->fb && !state->crtc) {476 drm_dbg_atomic(connector->dev,477 "[CONNECTOR:%d:%s] framebuffer without CRTC\n",478 connector->base.id, connector->name);479 return -EINVAL;480 }481 482 if (state->crtc)483 crtc_state = drm_atomic_get_existing_crtc_state(state->state,484 state->crtc);485 486 if (writeback_job->fb && !crtc_state->active) {487 drm_dbg_atomic(connector->dev,488 "[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",489 connector->base.id, connector->name,490 state->crtc->base.id);491 return -EINVAL;492 }493 494 if (!writeback_job->fb) {495 if (writeback_job->out_fence) {496 drm_dbg_atomic(connector->dev,497 "[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",498 connector->base.id, connector->name);499 return -EINVAL;500 }501 502 drm_writeback_cleanup_job(writeback_job);503 state->writeback_job = NULL;504 }505 506 return 0;507}508 509/**510 * drm_atomic_get_plane_state - get plane state511 * @state: global atomic state object512 * @plane: plane to get state object for513 *514 * This function returns the plane state for the given plane, allocating it if515 * needed. It will also grab the relevant plane lock to make sure that the state516 * is consistent.517 *518 * Returns:519 * Either the allocated state or the error code encoded into the pointer. When520 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the521 * entire atomic sequence must be restarted. All other errors are fatal.522 */523struct drm_plane_state *524drm_atomic_get_plane_state(struct drm_atomic_state *state,525 struct drm_plane *plane)526{527 int ret, index = drm_plane_index(plane);528 struct drm_plane_state *plane_state;529 530 WARN_ON(!state->acquire_ctx);531 532 /* the legacy pointers should never be set */533 WARN_ON(plane->fb);534 WARN_ON(plane->old_fb);535 WARN_ON(plane->crtc);536 537 plane_state = drm_atomic_get_existing_plane_state(state, plane);538 if (plane_state)539 return plane_state;540 541 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);542 if (ret)543 return ERR_PTR(ret);544 545 plane_state = plane->funcs->atomic_duplicate_state(plane);546 if (!plane_state)547 return ERR_PTR(-ENOMEM);548 549 state->planes[index].state = plane_state;550 state->planes[index].ptr = plane;551 state->planes[index].old_state = plane->state;552 state->planes[index].new_state = plane_state;553 plane_state->state = state;554 555 drm_dbg_atomic(plane->dev, "Added [PLANE:%d:%s] %p state to %p\n",556 plane->base.id, plane->name, plane_state, state);557 558 if (plane_state->crtc) {559 struct drm_crtc_state *crtc_state;560 561 crtc_state = drm_atomic_get_crtc_state(state,562 plane_state->crtc);563 if (IS_ERR(crtc_state))564 return ERR_CAST(crtc_state);565 }566 567 return plane_state;568}569EXPORT_SYMBOL(drm_atomic_get_plane_state);570 571static bool572plane_switching_crtc(const struct drm_plane_state *old_plane_state,573 const struct drm_plane_state *new_plane_state)574{575 if (!old_plane_state->crtc || !new_plane_state->crtc)576 return false;577 578 if (old_plane_state->crtc == new_plane_state->crtc)579 return false;580 581 /* This could be refined, but currently there's no helper or driver code582 * to implement direct switching of active planes nor userspace to take583 * advantage of more direct plane switching without the intermediate584 * full OFF state.585 */586 return true;587}588 589/**590 * drm_atomic_plane_check - check plane state591 * @old_plane_state: old plane state to check592 * @new_plane_state: new plane state to check593 *594 * Provides core sanity checks for plane state.595 *596 * RETURNS:597 * Zero on success, error code on failure598 */599static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,600 const struct drm_plane_state *new_plane_state)601{602 struct drm_plane *plane = new_plane_state->plane;603 struct drm_crtc *crtc = new_plane_state->crtc;604 const struct drm_framebuffer *fb = new_plane_state->fb;605 unsigned int fb_width, fb_height;606 struct drm_mode_rect *clips;607 uint32_t num_clips;608 609 /* either *both* CRTC and FB must be set, or neither */610 if (crtc && !fb) {611 drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] CRTC set but no FB\n",612 plane->base.id, plane->name);613 return -EINVAL;614 } else if (fb && !crtc) {615 drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] FB set but no CRTC\n",616 plane->base.id, plane->name);617 return -EINVAL;618 }619 620 /* if disabled, we don't care about the rest of the state: */621 if (!crtc)622 return 0;623 624 /* Check whether this plane is usable on this CRTC */625 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {626 drm_dbg_atomic(plane->dev,627 "Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",628 crtc->base.id, crtc->name,629 plane->base.id, plane->name);630 return -EINVAL;631 }632 633 /* Check whether this plane supports the fb pixel format. */634 if (!drm_plane_has_format(plane, fb->format->format, fb->modifier)) {635 drm_dbg_atomic(plane->dev,636 "[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n",637 plane->base.id, plane->name,638 &fb->format->format, fb->modifier);639 return -EINVAL;640 }641 642 /* Give drivers some help against integer overflows */643 if (new_plane_state->crtc_w > INT_MAX ||644 new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||645 new_plane_state->crtc_h > INT_MAX ||646 new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {647 drm_dbg_atomic(plane->dev,648 "[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",649 plane->base.id, plane->name,650 new_plane_state->crtc_w, new_plane_state->crtc_h,651 new_plane_state->crtc_x, new_plane_state->crtc_y);652 return -ERANGE;653 }654 655 fb_width = fb->width << 16;656 fb_height = fb->height << 16;657 658 /* Make sure source coordinates are inside the fb. */659 if (new_plane_state->src_w > fb_width ||660 new_plane_state->src_x > fb_width - new_plane_state->src_w ||661 new_plane_state->src_h > fb_height ||662 new_plane_state->src_y > fb_height - new_plane_state->src_h) {663 drm_dbg_atomic(plane->dev,664 "[PLANE:%d:%s] invalid source coordinates "665 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",666 plane->base.id, plane->name,667 new_plane_state->src_w >> 16,668 ((new_plane_state->src_w & 0xffff) * 15625) >> 10,669 new_plane_state->src_h >> 16,670 ((new_plane_state->src_h & 0xffff) * 15625) >> 10,671 new_plane_state->src_x >> 16,672 ((new_plane_state->src_x & 0xffff) * 15625) >> 10,673 new_plane_state->src_y >> 16,674 ((new_plane_state->src_y & 0xffff) * 15625) >> 10,675 fb->width, fb->height);676 return -ENOSPC;677 }678 679 clips = __drm_plane_get_damage_clips(new_plane_state);680 num_clips = drm_plane_get_damage_clips_count(new_plane_state);681 682 /* Make sure damage clips are valid and inside the fb. */683 while (num_clips > 0) {684 if (clips->x1 >= clips->x2 ||685 clips->y1 >= clips->y2 ||686 clips->x1 < 0 ||687 clips->y1 < 0 ||688 clips->x2 > fb_width ||689 clips->y2 > fb_height) {690 drm_dbg_atomic(plane->dev,691 "[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",692 plane->base.id, plane->name, clips->x1,693 clips->y1, clips->x2, clips->y2);694 return -EINVAL;695 }696 clips++;697 num_clips--;698 }699 700 if (plane_switching_crtc(old_plane_state, new_plane_state)) {701 drm_dbg_atomic(plane->dev,702 "[PLANE:%d:%s] switching CRTC directly\n",703 plane->base.id, plane->name);704 return -EINVAL;705 }706 707 return 0;708}709 710static void drm_atomic_plane_print_state(struct drm_printer *p,711 const struct drm_plane_state *state)712{713 struct drm_plane *plane = state->plane;714 struct drm_rect src = drm_plane_state_src(state);715 struct drm_rect dest = drm_plane_state_dest(state);716 717 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);718 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");719 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);720 if (state->fb)721 drm_framebuffer_print_info(p, 2, state->fb);722 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));723 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));724 drm_printf(p, "\trotation=%x\n", state->rotation);725 drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos);726 drm_printf(p, "\tcolor-encoding=%s\n",727 drm_get_color_encoding_name(state->color_encoding));728 drm_printf(p, "\tcolor-range=%s\n",729 drm_get_color_range_name(state->color_range));730 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);731 732 if (plane->funcs->atomic_print_state)733 plane->funcs->atomic_print_state(p, state);734}735 736/**737 * DOC: handling driver private state738 *739 * Very often the DRM objects exposed to userspace in the atomic modeset api740 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the741 * underlying hardware. Especially for any kind of shared resources (e.g. shared742 * clocks, scaler units, bandwidth and fifo limits shared among a group of743 * planes or CRTCs, and so on) it makes sense to model these as independent744 * objects. Drivers then need to do similar state tracking and commit ordering for745 * such private (since not exposed to userspace) objects as the atomic core and746 * helpers already provide for connectors, planes and CRTCs.747 *748 * To make this easier on drivers the atomic core provides some support to track749 * driver private state objects using struct &drm_private_obj, with the750 * associated state struct &drm_private_state.751 *752 * Similar to userspace-exposed objects, private state structures can be753 * acquired by calling drm_atomic_get_private_obj_state(). This also takes care754 * of locking, hence drivers should not have a need to call drm_modeset_lock()755 * directly. Sequence of the actual hardware state commit is not handled,756 * drivers might need to keep track of struct drm_crtc_commit within subclassed757 * structure of &drm_private_state as necessary, e.g. similar to758 * &drm_plane_state.commit. See also &drm_atomic_state.fake_commit.759 *760 * All private state structures contained in a &drm_atomic_state update can be761 * iterated using for_each_oldnew_private_obj_in_state(),762 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().763 * Drivers are recommended to wrap these for each type of driver private state764 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at765 * least if they want to iterate over all objects of a given type.766 *767 * An earlier way to handle driver private state was by subclassing struct768 * &drm_atomic_state. But since that encourages non-standard ways to implement769 * the check/commit split atomic requires (by using e.g. "check and rollback or770 * commit instead" of "duplicate state, check, then either commit or release771 * duplicated state) it is deprecated in favour of using &drm_private_state.772 */773 774/**775 * drm_atomic_private_obj_init - initialize private object776 * @dev: DRM device this object will be attached to777 * @obj: private object778 * @state: initial private object state779 * @funcs: pointer to the struct of function pointers that identify the object780 * type781 *782 * Initialize the private object, which can be embedded into any783 * driver private object that needs its own atomic state.784 */785void786drm_atomic_private_obj_init(struct drm_device *dev,787 struct drm_private_obj *obj,788 struct drm_private_state *state,789 const struct drm_private_state_funcs *funcs)790{791 memset(obj, 0, sizeof(*obj));792 793 drm_modeset_lock_init(&obj->lock);794 795 obj->state = state;796 obj->funcs = funcs;797 list_add_tail(&obj->head, &dev->mode_config.privobj_list);798 799 state->obj = obj;800}801EXPORT_SYMBOL(drm_atomic_private_obj_init);802 803/**804 * drm_atomic_private_obj_fini - finalize private object805 * @obj: private object806 *807 * Finalize the private object.808 */809void810drm_atomic_private_obj_fini(struct drm_private_obj *obj)811{812 list_del(&obj->head);813 obj->funcs->atomic_destroy_state(obj, obj->state);814 drm_modeset_lock_fini(&obj->lock);815}816EXPORT_SYMBOL(drm_atomic_private_obj_fini);817 818/**819 * drm_atomic_get_private_obj_state - get private object state820 * @state: global atomic state821 * @obj: private object to get the state for822 *823 * This function returns the private object state for the given private object,824 * allocating the state if needed. It will also grab the relevant private825 * object lock to make sure that the state is consistent.826 *827 * RETURNS:828 * Either the allocated state or the error code encoded into a pointer.829 */830struct drm_private_state *831drm_atomic_get_private_obj_state(struct drm_atomic_state *state,832 struct drm_private_obj *obj)833{834 int index, num_objs, i, ret;835 size_t size;836 struct __drm_private_objs_state *arr;837 struct drm_private_state *obj_state;838 839 for (i = 0; i < state->num_private_objs; i++)840 if (obj == state->private_objs[i].ptr)841 return state->private_objs[i].state;842 843 ret = drm_modeset_lock(&obj->lock, state->acquire_ctx);844 if (ret)845 return ERR_PTR(ret);846 847 num_objs = state->num_private_objs + 1;848 size = sizeof(*state->private_objs) * num_objs;849 arr = krealloc(state->private_objs, size, GFP_KERNEL);850 if (!arr)851 return ERR_PTR(-ENOMEM);852 853 state->private_objs = arr;854 index = state->num_private_objs;855 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));856 857 obj_state = obj->funcs->atomic_duplicate_state(obj);858 if (!obj_state)859 return ERR_PTR(-ENOMEM);860 861 state->private_objs[index].state = obj_state;862 state->private_objs[index].old_state = obj->state;863 state->private_objs[index].new_state = obj_state;864 state->private_objs[index].ptr = obj;865 obj_state->state = state;866 867 state->num_private_objs = num_objs;868 869 drm_dbg_atomic(state->dev,870 "Added new private object %p state %p to %p\n",871 obj, obj_state, state);872 873 return obj_state;874}875EXPORT_SYMBOL(drm_atomic_get_private_obj_state);876 877/**878 * drm_atomic_get_old_private_obj_state879 * @state: global atomic state object880 * @obj: private_obj to grab881 *882 * This function returns the old private object state for the given private_obj,883 * or NULL if the private_obj is not part of the global atomic state.884 */885struct drm_private_state *886drm_atomic_get_old_private_obj_state(const struct drm_atomic_state *state,887 struct drm_private_obj *obj)888{889 int i;890 891 for (i = 0; i < state->num_private_objs; i++)892 if (obj == state->private_objs[i].ptr)893 return state->private_objs[i].old_state;894 895 return NULL;896}897EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);898 899/**900 * drm_atomic_get_new_private_obj_state901 * @state: global atomic state object902 * @obj: private_obj to grab903 *904 * This function returns the new private object state for the given private_obj,905 * or NULL if the private_obj is not part of the global atomic state.906 */907struct drm_private_state *908drm_atomic_get_new_private_obj_state(const struct drm_atomic_state *state,909 struct drm_private_obj *obj)910{911 int i;912 913 for (i = 0; i < state->num_private_objs; i++)914 if (obj == state->private_objs[i].ptr)915 return state->private_objs[i].new_state;916 917 return NULL;918}919EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);920 921/**922 * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder923 * @state: Atomic state924 * @encoder: The encoder to fetch the connector state for925 *926 * This function finds and returns the connector that was connected to @encoder927 * as specified by the @state.928 *929 * If there is no connector in @state which previously had @encoder connected to930 * it, this function will return NULL. While this may seem like an invalid use931 * case, it is sometimes useful to differentiate commits which had no prior932 * connectors attached to @encoder vs ones that did (and to inspect their933 * state). This is especially true in enable hooks because the pipeline has934 * changed.935 *936 * Returns: The old connector connected to @encoder, or NULL if the encoder is937 * not connected.938 */939struct drm_connector *940drm_atomic_get_old_connector_for_encoder(const struct drm_atomic_state *state,941 struct drm_encoder *encoder)942{943 struct drm_connector_state *conn_state;944 struct drm_connector *connector;945 unsigned int i;946 947 for_each_old_connector_in_state(state, connector, conn_state, i) {948 if (conn_state->best_encoder == encoder)949 return connector;950 }951 952 return NULL;953}954EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);955 956/**957 * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder958 * @state: Atomic state959 * @encoder: The encoder to fetch the connector state for960 *961 * This function finds and returns the connector that will be connected to962 * @encoder as specified by the @state.963 *964 * If there is no connector in @state which will have @encoder connected to it,965 * this function will return NULL. While this may seem like an invalid use case,966 * it is sometimes useful to differentiate commits which have no connectors967 * attached to @encoder vs ones that do (and to inspect their state). This is968 * especially true in disable hooks because the pipeline will change.969 *970 * Returns: The new connector connected to @encoder, or NULL if the encoder is971 * not connected.972 */973struct drm_connector *974drm_atomic_get_new_connector_for_encoder(const struct drm_atomic_state *state,975 struct drm_encoder *encoder)976{977 struct drm_connector_state *conn_state;978 struct drm_connector *connector;979 unsigned int i;980 981 for_each_new_connector_in_state(state, connector, conn_state, i) {982 if (conn_state->best_encoder == encoder)983 return connector;984 }985 986 return NULL;987}988EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);989 990/**991 * drm_atomic_get_old_crtc_for_encoder - Get old crtc for an encoder992 * @state: Atomic state993 * @encoder: The encoder to fetch the crtc state for994 *995 * This function finds and returns the crtc that was connected to @encoder996 * as specified by the @state.997 *998 * Returns: The old crtc connected to @encoder, or NULL if the encoder is999 * not connected.1000 */1001struct drm_crtc *1002drm_atomic_get_old_crtc_for_encoder(struct drm_atomic_state *state,1003 struct drm_encoder *encoder)1004{1005 struct drm_connector *connector;1006 struct drm_connector_state *conn_state;1007 1008 connector = drm_atomic_get_old_connector_for_encoder(state, encoder);1009 if (!connector)1010 return NULL;1011 1012 conn_state = drm_atomic_get_old_connector_state(state, connector);1013 if (!conn_state)1014 return NULL;1015 1016 return conn_state->crtc;1017}1018EXPORT_SYMBOL(drm_atomic_get_old_crtc_for_encoder);1019 1020/**1021 * drm_atomic_get_new_crtc_for_encoder - Get new crtc for an encoder1022 * @state: Atomic state1023 * @encoder: The encoder to fetch the crtc state for1024 *1025 * This function finds and returns the crtc that will be connected to @encoder1026 * as specified by the @state.1027 *1028 * Returns: The new crtc connected to @encoder, or NULL if the encoder is1029 * not connected.1030 */1031struct drm_crtc *1032drm_atomic_get_new_crtc_for_encoder(struct drm_atomic_state *state,1033 struct drm_encoder *encoder)1034{1035 struct drm_connector *connector;1036 struct drm_connector_state *conn_state;1037 1038 connector = drm_atomic_get_new_connector_for_encoder(state, encoder);1039 if (!connector)1040 return NULL;1041 1042 conn_state = drm_atomic_get_new_connector_state(state, connector);1043 if (!conn_state)1044 return NULL;1045 1046 return conn_state->crtc;1047}1048EXPORT_SYMBOL(drm_atomic_get_new_crtc_for_encoder);1049 1050/**1051 * drm_atomic_get_connector_state - get connector state1052 * @state: global atomic state object1053 * @connector: connector to get state object for1054 *1055 * This function returns the connector state for the given connector,1056 * allocating it if needed. It will also grab the relevant connector lock to1057 * make sure that the state is consistent.1058 *1059 * Returns:1060 * Either the allocated state or the error code encoded into the pointer. When1061 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the1062 * entire atomic sequence must be restarted. All other errors are fatal.1063 */1064struct drm_connector_state *1065drm_atomic_get_connector_state(struct drm_atomic_state *state,1066 struct drm_connector *connector)1067{1068 int ret, index;1069 struct drm_mode_config *config = &connector->dev->mode_config;1070 struct drm_connector_state *connector_state;1071 1072 WARN_ON(!state->acquire_ctx);1073 1074 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);1075 if (ret)1076 return ERR_PTR(ret);1077 1078 index = drm_connector_index(connector);1079 1080 if (index >= state->num_connector) {1081 struct __drm_connnectors_state *c;1082 int alloc = max(index + 1, config->num_connector);1083 1084 c = krealloc_array(state->connectors, alloc,1085 sizeof(*state->connectors), GFP_KERNEL);1086 if (!c)1087 return ERR_PTR(-ENOMEM);1088 1089 state->connectors = c;1090 memset(&state->connectors[state->num_connector], 0,1091 sizeof(*state->connectors) * (alloc - state->num_connector));1092 1093 state->num_connector = alloc;1094 }1095 1096 if (state->connectors[index].state)1097 return state->connectors[index].state;1098 1099 connector_state = connector->funcs->atomic_duplicate_state(connector);1100 if (!connector_state)1101 return ERR_PTR(-ENOMEM);1102 1103 drm_connector_get(connector);1104 state->connectors[index].state = connector_state;1105 state->connectors[index].old_state = connector->state;1106 state->connectors[index].new_state = connector_state;1107 state->connectors[index].ptr = connector;1108 connector_state->state = state;1109 1110 drm_dbg_atomic(connector->dev, "Added [CONNECTOR:%d:%s] %p state to %p\n",1111 connector->base.id, connector->name,1112 connector_state, state);1113 1114 if (connector_state->crtc) {1115 struct drm_crtc_state *crtc_state;1116 1117 crtc_state = drm_atomic_get_crtc_state(state,1118 connector_state->crtc);1119 if (IS_ERR(crtc_state))1120 return ERR_CAST(crtc_state);1121 }1122 1123 return connector_state;1124}1125EXPORT_SYMBOL(drm_atomic_get_connector_state);1126 1127static void drm_atomic_connector_print_state(struct drm_printer *p,1128 const struct drm_connector_state *state)1129{1130 struct drm_connector *connector = state->connector;1131 1132 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);1133 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");1134 drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware);1135 drm_printf(p, "\tmax_requested_bpc=%d\n", state->max_requested_bpc);1136 drm_printf(p, "\tcolorspace=%s\n", drm_get_colorspace_name(state->colorspace));1137 1138 if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||1139 connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) {1140 drm_printf(p, "\tbroadcast_rgb=%s\n",1141 drm_hdmi_connector_get_broadcast_rgb_name(state->hdmi.broadcast_rgb));1142 drm_printf(p, "\tis_limited_range=%c\n", state->hdmi.is_limited_range ? 'y' : 'n');1143 drm_printf(p, "\toutput_bpc=%u\n", state->hdmi.output_bpc);1144 drm_printf(p, "\toutput_format=%s\n",1145 drm_hdmi_connector_get_output_format_name(state->hdmi.output_format));1146 drm_printf(p, "\ttmds_char_rate=%llu\n", state->hdmi.tmds_char_rate);1147 }1148 1149 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)1150 if (state->writeback_job && state->writeback_job->fb)1151 drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);1152 1153 if (connector->funcs->atomic_print_state)1154 connector->funcs->atomic_print_state(p, state);1155}1156 1157/**1158 * drm_atomic_get_bridge_state - get bridge state1159 * @state: global atomic state object1160 * @bridge: bridge to get state object for1161 *1162 * This function returns the bridge state for the given bridge, allocating it1163 * if needed. It will also grab the relevant bridge lock to make sure that the1164 * state is consistent.1165 *1166 * Returns:1167 * Either the allocated state or the error code encoded into the pointer. When1168 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the1169 * entire atomic sequence must be restarted.1170 */1171struct drm_bridge_state *1172drm_atomic_get_bridge_state(struct drm_atomic_state *state,1173 struct drm_bridge *bridge)1174{1175 struct drm_private_state *obj_state;1176 1177 obj_state = drm_atomic_get_private_obj_state(state, &bridge->base);1178 if (IS_ERR(obj_state))1179 return ERR_CAST(obj_state);1180 1181 return drm_priv_to_bridge_state(obj_state);1182}1183EXPORT_SYMBOL(drm_atomic_get_bridge_state);1184 1185/**1186 * drm_atomic_get_old_bridge_state - get old bridge state, if it exists1187 * @state: global atomic state object1188 * @bridge: bridge to grab1189 *1190 * This function returns the old bridge state for the given bridge, or NULL if1191 * the bridge is not part of the global atomic state.1192 */1193struct drm_bridge_state *1194drm_atomic_get_old_bridge_state(const struct drm_atomic_state *state,1195 struct drm_bridge *bridge)1196{1197 struct drm_private_state *obj_state;1198 1199 obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base);1200 if (!obj_state)1201 return NULL;1202 1203 return drm_priv_to_bridge_state(obj_state);1204}1205EXPORT_SYMBOL(drm_atomic_get_old_bridge_state);1206 1207/**1208 * drm_atomic_get_new_bridge_state - get new bridge state, if it exists1209 * @state: global atomic state object1210 * @bridge: bridge to grab1211 *1212 * This function returns the new bridge state for the given bridge, or NULL if1213 * the bridge is not part of the global atomic state.1214 */1215struct drm_bridge_state *1216drm_atomic_get_new_bridge_state(const struct drm_atomic_state *state,1217 struct drm_bridge *bridge)1218{1219 struct drm_private_state *obj_state;1220 1221 obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base);1222 if (!obj_state)1223 return NULL;1224 1225 return drm_priv_to_bridge_state(obj_state);1226}1227EXPORT_SYMBOL(drm_atomic_get_new_bridge_state);1228 1229/**1230 * drm_atomic_add_encoder_bridges - add bridges attached to an encoder1231 * @state: atomic state1232 * @encoder: DRM encoder1233 *1234 * This function adds all bridges attached to @encoder. This is needed to add1235 * bridge states to @state and make them available when1236 * &drm_bridge_funcs.atomic_check(), &drm_bridge_funcs.atomic_pre_enable(),1237 * &drm_bridge_funcs.atomic_enable(),1238 * &drm_bridge_funcs.atomic_disable_post_disable() are called.1239 *1240 * Returns:1241 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK1242 * then the w/w mutex code has detected a deadlock and the entire atomic1243 * sequence must be restarted. All other errors are fatal.1244 */1245int1246drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,1247 struct drm_encoder *encoder)1248{1249 struct drm_bridge_state *bridge_state;1250 struct drm_bridge *bridge;1251 1252 if (!encoder)1253 return 0;1254 1255 drm_dbg_atomic(encoder->dev,1256 "Adding all bridges for [encoder:%d:%s] to %p\n",1257 encoder->base.id, encoder->name, state);1258 1259 drm_for_each_bridge_in_chain(encoder, bridge) {1260 /* Skip bridges that don't implement the atomic state hooks. */1261 if (!bridge->funcs->atomic_duplicate_state)1262 continue;1263 1264 bridge_state = drm_atomic_get_bridge_state(state, bridge);1265 if (IS_ERR(bridge_state))1266 return PTR_ERR(bridge_state);1267 }1268 1269 return 0;1270}1271EXPORT_SYMBOL(drm_atomic_add_encoder_bridges);1272 1273/**1274 * drm_atomic_add_affected_connectors - add connectors for CRTC1275 * @state: atomic state1276 * @crtc: DRM CRTC1277 *1278 * This function walks the current configuration and adds all connectors1279 * currently using @crtc to the atomic configuration @state. Note that this1280 * function must acquire the connection mutex. This can potentially cause1281 * unneeded serialization if the update is just for the planes on one CRTC. Hence1282 * drivers and helpers should only call this when really needed (e.g. when a1283 * full modeset needs to happen due to some change).1284 *1285 * Returns:1286 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK1287 * then the w/w mutex code has detected a deadlock and the entire atomic1288 * sequence must be restarted. All other errors are fatal.1289 */1290int1291drm_atomic_add_affected_connectors(struct drm_atomic_state *state,1292 struct drm_crtc *crtc)1293{1294 struct drm_mode_config *config = &state->dev->mode_config;1295 struct drm_connector *connector;1296 struct drm_connector_state *conn_state;1297 struct drm_connector_list_iter conn_iter;1298 struct drm_crtc_state *crtc_state;1299 int ret;1300 1301 crtc_state = drm_atomic_get_crtc_state(state, crtc);1302 if (IS_ERR(crtc_state))1303 return PTR_ERR(crtc_state);1304 1305 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);1306 if (ret)1307 return ret;1308 1309 drm_dbg_atomic(crtc->dev,1310 "Adding all current connectors for [CRTC:%d:%s] to %p\n",1311 crtc->base.id, crtc->name, state);1312 1313 /*1314 * Changed connectors are already in @state, so only need to look1315 * at the connector_mask in crtc_state.1316 */1317 drm_connector_list_iter_begin(state->dev, &conn_iter);1318 drm_for_each_connector_iter(connector, &conn_iter) {1319 if (!(crtc_state->connector_mask & drm_connector_mask(connector)))1320 continue;1321 1322 conn_state = drm_atomic_get_connector_state(state, connector);1323 if (IS_ERR(conn_state)) {1324 drm_connector_list_iter_end(&conn_iter);1325 return PTR_ERR(conn_state);1326 }1327 }1328 drm_connector_list_iter_end(&conn_iter);1329 1330 return 0;1331}1332EXPORT_SYMBOL(drm_atomic_add_affected_connectors);1333 1334/**1335 * drm_atomic_add_affected_planes - add planes for CRTC1336 * @state: atomic state1337 * @crtc: DRM CRTC1338 *1339 * This function walks the current configuration and adds all planes1340 * currently used by @crtc to the atomic configuration @state. This is useful1341 * when an atomic commit also needs to check all currently enabled plane on1342 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC1343 * to avoid special code to force-enable all planes.1344 *1345 * Since acquiring a plane state will always also acquire the w/w mutex of the1346 * current CRTC for that plane (if there is any) adding all the plane states for1347 * a CRTC will not reduce parallelism of atomic updates.1348 *1349 * Returns:1350 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK1351 * then the w/w mutex code has detected a deadlock and the entire atomic1352 * sequence must be restarted. All other errors are fatal.1353 */1354int1355drm_atomic_add_affected_planes(struct drm_atomic_state *state,1356 struct drm_crtc *crtc)1357{1358 const struct drm_crtc_state *old_crtc_state =1359 drm_atomic_get_old_crtc_state(state, crtc);1360 struct drm_plane *plane;1361 1362 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));1363 1364 drm_dbg_atomic(crtc->dev,1365 "Adding all current planes for [CRTC:%d:%s] to %p\n",1366 crtc->base.id, crtc->name, state);1367 1368 drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {1369 struct drm_plane_state *plane_state =1370 drm_atomic_get_plane_state(state, plane);1371 1372 if (IS_ERR(plane_state))1373 return PTR_ERR(plane_state);1374 }1375 return 0;1376}1377EXPORT_SYMBOL(drm_atomic_add_affected_planes);1378 1379/**1380 * drm_atomic_check_only - check whether a given config would work1381 * @state: atomic configuration to check1382 *1383 * Note that this function can return -EDEADLK if the driver needed to acquire1384 * more locks but encountered a deadlock. The caller must then do the usual w/w1385 * backoff dance and restart. All other errors are fatal.1386 *1387 * Returns:1388 * 0 on success, negative error code on failure.1389 */1390int drm_atomic_check_only(struct drm_atomic_state *state)1391{1392 struct drm_device *dev = state->dev;1393 struct drm_mode_config *config = &dev->mode_config;1394 struct drm_plane *plane;1395 struct drm_plane_state *old_plane_state;1396 struct drm_plane_state *new_plane_state;1397 struct drm_crtc *crtc;1398 struct drm_crtc_state *old_crtc_state;1399 struct drm_crtc_state *new_crtc_state;1400 struct drm_connector *conn;1401 struct drm_connector_state *conn_state;1402 unsigned int requested_crtc = 0;1403 unsigned int affected_crtc = 0;1404 int i, ret = 0;1405 1406 drm_dbg_atomic(dev, "checking %p\n", state);1407 1408 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {1409 if (new_crtc_state->enable)1410 requested_crtc |= drm_crtc_mask(crtc);1411 }1412 1413 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {1414 ret = drm_atomic_plane_check(old_plane_state, new_plane_state);1415 if (ret) {1416 drm_dbg_atomic(dev, "[PLANE:%d:%s] atomic core check failed\n",1417 plane->base.id, plane->name);1418 return ret;1419 }1420 }1421 1422 for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {1423 ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);1424 if (ret) {1425 drm_dbg_atomic(dev, "[CRTC:%d:%s] atomic core check failed\n",1426 crtc->base.id, crtc->name);1427 return ret;1428 }1429 }1430 1431 for_each_new_connector_in_state(state, conn, conn_state, i) {1432 ret = drm_atomic_connector_check(conn, conn_state);1433 if (ret) {1434 drm_dbg_atomic(dev, "[CONNECTOR:%d:%s] atomic core check failed\n",1435 conn->base.id, conn->name);1436 return ret;1437 }1438 }1439 1440 if (config->funcs->atomic_check) {1441 ret = config->funcs->atomic_check(state->dev, state);1442 1443 if (ret) {1444 drm_dbg_atomic(dev, "atomic driver check for %p failed: %d\n",1445 state, ret);1446 return ret;1447 }1448 }1449 1450 if (!state->allow_modeset) {1451 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {1452 if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {1453 drm_dbg_atomic(dev, "[CRTC:%d:%s] requires full modeset\n",1454 crtc->base.id, crtc->name);1455 return -EINVAL;1456 }1457 }1458 }1459 1460 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {1461 if (new_crtc_state->enable)1462 affected_crtc |= drm_crtc_mask(crtc);1463 }1464 1465 /*1466 * For commits that allow modesets drivers can add other CRTCs to the1467 * atomic commit, e.g. when they need to reallocate global resources.1468 * This can cause spurious EBUSY, which robs compositors of a very1469 * effective sanity check for their drawing loop. Therefor only allow1470 * drivers to add unrelated CRTC states for modeset commits.1471 *1472 * FIXME: Should add affected_crtc mask to the ATOMIC IOCTL as an output1473 * so compositors know what's going on.1474 */1475 if (affected_crtc != requested_crtc) {1476 drm_dbg_atomic(dev,1477 "driver added CRTC to commit: requested 0x%x, affected 0x%0x\n",1478 requested_crtc, affected_crtc);1479 WARN(!state->allow_modeset, "adding CRTC not allowed without modesets: requested 0x%x, affected 0x%0x\n",1480 requested_crtc, affected_crtc);1481 }1482 1483 return 0;1484}1485EXPORT_SYMBOL(drm_atomic_check_only);1486 1487/**1488 * drm_atomic_commit - commit configuration atomically1489 * @state: atomic configuration to check1490 *1491 * Note that this function can return -EDEADLK if the driver needed to acquire1492 * more locks but encountered a deadlock. The caller must then do the usual w/w1493 * backoff dance and restart. All other errors are fatal.1494 *1495 * This function will take its own reference on @state.1496 * Callers should always release their reference with drm_atomic_state_put().1497 *1498 * Returns:1499 * 0 on success, negative error code on failure.1500 */1501int drm_atomic_commit(struct drm_atomic_state *state)1502{1503 struct drm_mode_config *config = &state->dev->mode_config;1504 struct drm_printer p = drm_info_printer(state->dev->dev);1505 int ret;1506 1507 if (drm_debug_enabled(DRM_UT_STATE))1508 drm_atomic_print_new_state(state, &p);1509 1510 ret = drm_atomic_check_only(state);1511 if (ret)1512 return ret;1513 1514 drm_dbg_atomic(state->dev, "committing %p\n", state);1515 1516 return config->funcs->atomic_commit(state->dev, state, false);1517}1518EXPORT_SYMBOL(drm_atomic_commit);1519 1520/**1521 * drm_atomic_nonblocking_commit - atomic nonblocking commit1522 * @state: atomic configuration to check1523 *1524 * Note that this function can return -EDEADLK if the driver needed to acquire1525 * more locks but encountered a deadlock. The caller must then do the usual w/w1526 * backoff dance and restart. All other errors are fatal.1527 *1528 * This function will take its own reference on @state.1529 * Callers should always release their reference with drm_atomic_state_put().1530 *1531 * Returns:1532 * 0 on success, negative error code on failure.1533 */1534int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)1535{1536 struct drm_mode_config *config = &state->dev->mode_config;1537 int ret;1538 1539 ret = drm_atomic_check_only(state);1540 if (ret)1541 return ret;1542 1543 drm_dbg_atomic(state->dev, "committing %p nonblocking\n", state);1544 1545 return config->funcs->atomic_commit(state->dev, state, true);1546}1547EXPORT_SYMBOL(drm_atomic_nonblocking_commit);1548 1549/* just used from drm-client and atomic-helper: */1550int __drm_atomic_helper_disable_plane(struct drm_plane *plane,1551 struct drm_plane_state *plane_state)1552{1553 int ret;1554 1555 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);1556 if (ret != 0)1557 return ret;1558 1559 drm_atomic_set_fb_for_plane(plane_state, NULL);1560 plane_state->crtc_x = 0;1561 plane_state->crtc_y = 0;1562 plane_state->crtc_w = 0;1563 plane_state->crtc_h = 0;1564 plane_state->src_x = 0;1565 plane_state->src_y = 0;1566 plane_state->src_w = 0;1567 plane_state->src_h = 0;1568 1569 return 0;1570}1571EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);1572 1573static int update_output_state(struct drm_atomic_state *state,1574 struct drm_mode_set *set)1575{1576 struct drm_device *dev = set->crtc->dev;1577 struct drm_crtc *crtc;1578 struct drm_crtc_state *new_crtc_state;1579 struct drm_connector *connector;1580 struct drm_connector_state *new_conn_state;1581 int ret, i;1582 1583 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,1584 state->acquire_ctx);1585 if (ret)1586 return ret;1587 1588 /* First disable all connectors on the target crtc. */1589 ret = drm_atomic_add_affected_connectors(state, set->crtc);1590 if (ret)1591 return ret;1592 1593 for_each_new_connector_in_state(state, connector, new_conn_state, i) {1594 if (new_conn_state->crtc == set->crtc) {1595 ret = drm_atomic_set_crtc_for_connector(new_conn_state,1596 NULL);1597 if (ret)1598 return ret;1599 1600 /* Make sure legacy setCrtc always re-trains */1601 new_conn_state->link_status = DRM_LINK_STATUS_GOOD;1602 }1603 }1604 1605 /* Then set all connectors from set->connectors on the target crtc */1606 for (i = 0; i < set->num_connectors; i++) {1607 new_conn_state = drm_atomic_get_connector_state(state,1608 set->connectors[i]);1609 if (IS_ERR(new_conn_state))1610 return PTR_ERR(new_conn_state);1611 1612 ret = drm_atomic_set_crtc_for_connector(new_conn_state,1613 set->crtc);1614 if (ret)1615 return ret;1616 }1617 1618 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {1619 /*1620 * Don't update ->enable for the CRTC in the set_config request,1621 * since a mismatch would indicate a bug in the upper layers.1622 * The actual modeset code later on will catch any1623 * inconsistencies here.1624 */1625 if (crtc == set->crtc)1626 continue;1627 1628 if (!new_crtc_state->connector_mask) {1629 ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state,1630 NULL);1631 if (ret < 0)1632 return ret;1633 1634 new_crtc_state->active = false;1635 }1636 }1637 1638 return 0;1639}1640 1641/* just used from drm-client and atomic-helper: */1642int __drm_atomic_helper_set_config(struct drm_mode_set *set,1643 struct drm_atomic_state *state)1644{1645 struct drm_crtc_state *crtc_state;1646 struct drm_plane_state *primary_state;1647 struct drm_crtc *crtc = set->crtc;1648 int hdisplay, vdisplay;1649 int ret;1650 1651 crtc_state = drm_atomic_get_crtc_state(state, crtc);1652 if (IS_ERR(crtc_state))1653 return PTR_ERR(crtc_state);1654 1655 primary_state = drm_atomic_get_plane_state(state, crtc->primary);1656 if (IS_ERR(primary_state))1657 return PTR_ERR(primary_state);1658 1659 if (!set->mode) {1660 WARN_ON(set->fb);1661 WARN_ON(set->num_connectors);1662 1663 ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);1664 if (ret != 0)1665 return ret;1666 1667 crtc_state->active = false;1668 1669 ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);1670 if (ret != 0)1671 return ret;1672 1673 drm_atomic_set_fb_for_plane(primary_state, NULL);1674 1675 goto commit;1676 }1677 1678 WARN_ON(!set->fb);1679 WARN_ON(!set->num_connectors);1680 1681 ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);1682 if (ret != 0)1683 return ret;1684 1685 crtc_state->active = true;1686 1687 ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);1688 if (ret != 0)1689 return ret;1690 1691 drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay);1692 1693 drm_atomic_set_fb_for_plane(primary_state, set->fb);1694 primary_state->crtc_x = 0;1695 primary_state->crtc_y = 0;1696 primary_state->crtc_w = hdisplay;1697 primary_state->crtc_h = vdisplay;1698 primary_state->src_x = set->x << 16;1699 primary_state->src_y = set->y << 16;1700 if (drm_rotation_90_or_270(primary_state->rotation)) {1701 primary_state->src_w = vdisplay << 16;1702 primary_state->src_h = hdisplay << 16;1703 } else {1704 primary_state->src_w = hdisplay << 16;1705 primary_state->src_h = vdisplay << 16;1706 }1707 1708commit:1709 ret = update_output_state(state, set);1710 if (ret)1711 return ret;1712 1713 return 0;1714}1715EXPORT_SYMBOL(__drm_atomic_helper_set_config);1716 1717static void drm_atomic_private_obj_print_state(struct drm_printer *p,1718 const struct drm_private_state *state)1719{1720 struct drm_private_obj *obj = state->obj;1721 1722 if (obj->funcs->atomic_print_state)1723 obj->funcs->atomic_print_state(p, state);1724}1725 1726/**1727 * drm_atomic_print_new_state - prints drm atomic state1728 * @state: atomic configuration to check1729 * @p: drm printer1730 *1731 * This functions prints the drm atomic state snapshot using the drm printer1732 * which is passed to it. This snapshot can be used for debugging purposes.1733 *1734 * Note that this function looks into the new state objects and hence its not1735 * safe to be used after the call to drm_atomic_helper_commit_hw_done().1736 */1737void drm_atomic_print_new_state(const struct drm_atomic_state *state,1738 struct drm_printer *p)1739{1740 struct drm_plane *plane;1741 struct drm_plane_state *plane_state;1742 struct drm_crtc *crtc;1743 struct drm_crtc_state *crtc_state;1744 struct drm_connector *connector;1745 struct drm_connector_state *connector_state;1746 struct drm_private_obj *obj;1747 struct drm_private_state *obj_state;1748 int i;1749 1750 if (!p) {1751 drm_err(state->dev, "invalid drm printer\n");1752 return;1753 }1754 1755 drm_dbg_atomic(state->dev, "checking %p\n", state);1756 1757 for_each_new_plane_in_state(state, plane, plane_state, i)1758 drm_atomic_plane_print_state(p, plane_state);1759 1760 for_each_new_crtc_in_state(state, crtc, crtc_state, i)1761 drm_atomic_crtc_print_state(p, crtc_state);1762 1763 for_each_new_connector_in_state(state, connector, connector_state, i)1764 drm_atomic_connector_print_state(p, connector_state);1765 1766 for_each_new_private_obj_in_state(state, obj, obj_state, i)1767 drm_atomic_private_obj_print_state(p, obj_state);1768}1769EXPORT_SYMBOL(drm_atomic_print_new_state);1770 1771static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,1772 bool take_locks)1773{1774 struct drm_mode_config *config = &dev->mode_config;1775 struct drm_plane *plane;1776 struct drm_crtc *crtc;1777 struct drm_connector *connector;1778 struct drm_connector_list_iter conn_iter;1779 struct drm_private_obj *obj;1780 1781 if (!drm_drv_uses_atomic_modeset(dev))1782 return;1783 1784 list_for_each_entry(plane, &config->plane_list, head) {1785 if (take_locks)1786 drm_modeset_lock(&plane->mutex, NULL);1787 drm_atomic_plane_print_state(p, plane->state);1788 if (take_locks)1789 drm_modeset_unlock(&plane->mutex);1790 }1791 1792 list_for_each_entry(crtc, &config->crtc_list, head) {1793 if (take_locks)1794 drm_modeset_lock(&crtc->mutex, NULL);1795 drm_atomic_crtc_print_state(p, crtc->state);1796 if (take_locks)1797 drm_modeset_unlock(&crtc->mutex);1798 }1799 1800 drm_connector_list_iter_begin(dev, &conn_iter);1801 if (take_locks)1802 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);1803 drm_for_each_connector_iter(connector, &conn_iter)1804 drm_atomic_connector_print_state(p, connector->state);1805 if (take_locks)1806 drm_modeset_unlock(&dev->mode_config.connection_mutex);1807 drm_connector_list_iter_end(&conn_iter);1808 1809 list_for_each_entry(obj, &config->privobj_list, head) {1810 if (take_locks)1811 drm_modeset_lock(&obj->lock, NULL);1812 drm_atomic_private_obj_print_state(p, obj->state);1813 if (take_locks)1814 drm_modeset_unlock(&obj->lock);1815 }1816}1817 1818/**1819 * drm_state_dump - dump entire device atomic state1820 * @dev: the drm device1821 * @p: where to print the state to1822 *1823 * Just for debugging. Drivers might want an option to dump state1824 * to dmesg in case of error irq's. (Hint, you probably want to1825 * ratelimit this!)1826 *1827 * The caller must wrap this drm_modeset_lock_all_ctx() and1828 * drm_modeset_drop_locks(). If this is called from error irq handler, it should1829 * not be enabled by default - if you are debugging errors you might1830 * not care that this is racey, but calling this without all modeset locks held1831 * is inherently unsafe.1832 */1833void drm_state_dump(struct drm_device *dev, struct drm_printer *p)1834{1835 __drm_state_dump(dev, p, false);1836}1837EXPORT_SYMBOL(drm_state_dump);1838 1839#ifdef CONFIG_DEBUG_FS1840static int drm_state_info(struct seq_file *m, void *data)1841{1842 struct drm_debugfs_entry *entry = m->private;1843 struct drm_device *dev = entry->dev;1844 struct drm_printer p = drm_seq_file_printer(m);1845 1846 __drm_state_dump(dev, &p, true);1847 1848 return 0;1849}1850 1851/* any use in debugfs files to dump individual planes/crtc/etc? */1852static const struct drm_debugfs_info drm_atomic_debugfs_list[] = {1853 {"state", drm_state_info, 0},1854};1855 1856void drm_atomic_debugfs_init(struct drm_device *dev)1857{1858 drm_debugfs_add_files(dev, drm_atomic_debugfs_list,1859 ARRAY_SIZE(drm_atomic_debugfs_list));1860}1861#endif1862