| /* |
| * Copyright (C) 2014 Red Hat |
| * Copyright (C) 2014 Intel Corp. |
| * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: |
| * Rob Clark <robdclark@gmail.com> |
| * Daniel Vetter <daniel.vetter@ffwll.ch> |
| */ |
| |
| |
| #include <linux/sync_file.h> |
| |
| #include <drm/drm_atomic.h> |
| #include <drm/drm_atomic_uapi.h> |
| #include <drm/drm_blend.h> |
| #include <drm/drm_bridge.h> |
| #include <drm/drm_debugfs.h> |
| #include <drm/drm_device.h> |
| #include <drm/drm_drv.h> |
| #include <drm/drm_file.h> |
| #include <drm/drm_fourcc.h> |
| #include <drm/drm_framebuffer.h> |
| #include <drm/drm_mode.h> |
| #include <drm/drm_print.h> |
| #include <drm/drm_writeback.h> |
| |
| #include "drm_crtc_internal.h" |
| #include "drm_internal.h" |
| |
| void __drm_crtc_commit_free(struct kref *kref) |
| { |
| struct drm_crtc_commit *commit = |
| container_of(kref, struct drm_crtc_commit, ref); |
| |
| kfree(commit); |
| } |
| EXPORT_SYMBOL(__drm_crtc_commit_free); |
| |
| /** |
| * drm_crtc_commit_wait - Waits for a commit to complete |
| * @commit: &drm_crtc_commit to wait for |
| * |
| * Waits for a given &drm_crtc_commit to be programmed into the |
| * hardware and flipped to. |
| * |
| * Returns: |
| * |
| * 0 on success, a negative error code otherwise. |
| */ |
| int drm_crtc_commit_wait(struct drm_crtc_commit *commit) |
| { |
| unsigned long timeout = 10 * HZ; |
| int ret; |
| |
| if (!commit) |
| return 0; |
| |
| ret = wait_for_completion_timeout(&commit->hw_done, timeout); |
| if (!ret) { |
| drm_err(commit->crtc->dev, "hw_done timed out\n"); |
| return -ETIMEDOUT; |
| } |
| |
| /* |
| * Currently no support for overwriting flips, hence |
| * stall for previous one to execute completely. |
| */ |
| ret = wait_for_completion_timeout(&commit->flip_done, timeout); |
| if (!ret) { |
| drm_err(commit->crtc->dev, "flip_done timed out\n"); |
| return -ETIMEDOUT; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_crtc_commit_wait); |
| |
| /** |
| * drm_atomic_state_default_release - |
| * release memory initialized by drm_atomic_state_init |
| * @state: atomic state |
| * |
| * Free all the memory allocated by drm_atomic_state_init. |
| * This should only be used by drivers which are still subclassing |
| * &drm_atomic_state and haven't switched to &drm_private_state yet. |
| */ |
| void drm_atomic_state_default_release(struct drm_atomic_state *state) |
| { |
| kfree(state->connectors); |
| kfree(state->crtcs); |
| kfree(state->planes); |
| kfree(state->private_objs); |
| } |
| EXPORT_SYMBOL(drm_atomic_state_default_release); |
| |
| /** |
| * drm_atomic_state_init - init new atomic state |
| * @dev: DRM device |
| * @state: atomic state |
| * |
| * Default implementation for filling in a new atomic state. |
| * This should only be used by drivers which are still subclassing |
| * &drm_atomic_state and haven't switched to &drm_private_state yet. |
| */ |
| int |
| drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state) |
| { |
| kref_init(&state->ref); |
| |
| /* TODO legacy paths should maybe do a better job about |
| * setting this appropriately? |
| */ |
| state->allow_modeset = true; |
| |
| state->crtcs = kcalloc(dev->mode_config.num_crtc, |
| sizeof(*state->crtcs), GFP_KERNEL); |
| if (!state->crtcs) |
| goto fail; |
| state->planes = kcalloc(dev->mode_config.num_total_plane, |
| sizeof(*state->planes), GFP_KERNEL); |
| if (!state->planes) |
| goto fail; |
| |
| state->dev = dev; |
| |
| drm_dbg_atomic(dev, "Allocated atomic state %p\n", state); |
| |
| return 0; |
| fail: |
| drm_atomic_state_default_release(state); |
| return -ENOMEM; |
| } |
| EXPORT_SYMBOL(drm_atomic_state_init); |
| |
| /** |
| * drm_atomic_state_alloc - allocate atomic state |
| * @dev: DRM device |
| * |
| * This allocates an empty atomic state to track updates. |
| */ |
| struct drm_atomic_state * |
| drm_atomic_state_alloc(struct drm_device *dev) |
| { |
| struct drm_mode_config *config = &dev->mode_config; |
| |
| if (!config->funcs->atomic_state_alloc) { |
| struct drm_atomic_state *state; |
| |
| state = kzalloc(sizeof(*state), GFP_KERNEL); |
| if (!state) |
| return NULL; |
| if (drm_atomic_state_init(dev, state) < 0) { |
| kfree(state); |
| return NULL; |
| } |
| return state; |
| } |
| |
| return config->funcs->atomic_state_alloc(dev); |
| } |
| EXPORT_SYMBOL(drm_atomic_state_alloc); |
| |
| /** |
| * drm_atomic_state_default_clear - clear base atomic state |
| * @state: atomic state |
| * |
| * Default implementation for clearing atomic state. |
| * This should only be used by drivers which are still subclassing |
| * &drm_atomic_state and haven't switched to &drm_private_state yet. |
| */ |
| void drm_atomic_state_default_clear(struct drm_atomic_state *state) |
| { |
| struct drm_device *dev = state->dev; |
| struct drm_mode_config *config = &dev->mode_config; |
| int i; |
| |
| drm_dbg_atomic(dev, "Clearing atomic state %p\n", state); |
| |
| for (i = 0; i < state->num_connector; i++) { |
| struct drm_connector *connector = state->connectors[i].ptr; |
| |
| if (!connector) |
| continue; |
| |
| connector->funcs->atomic_destroy_state(connector, |
| state->connectors[i].state); |
| state->connectors[i].ptr = NULL; |
| state->connectors[i].state = NULL; |
| state->connectors[i].old_state = NULL; |
| state->connectors[i].new_state = NULL; |
| drm_connector_put(connector); |
| } |
| |
| for (i = 0; i < config->num_crtc; i++) { |
| struct drm_crtc *crtc = state->crtcs[i].ptr; |
| |
| if (!crtc) |
| continue; |
| |
| crtc->funcs->atomic_destroy_state(crtc, |
| state->crtcs[i].state); |
| |
| state->crtcs[i].ptr = NULL; |
| state->crtcs[i].state = NULL; |
| state->crtcs[i].old_state = NULL; |
| state->crtcs[i].new_state = NULL; |
| |
| if (state->crtcs[i].commit) { |
| drm_crtc_commit_put(state->crtcs[i].commit); |
| state->crtcs[i].commit = NULL; |
| } |
| } |
| |
| for (i = 0; i < config->num_total_plane; i++) { |
| struct drm_plane *plane = state->planes[i].ptr; |
| |
| if (!plane) |
| continue; |
| |
| plane->funcs->atomic_destroy_state(plane, |
| state->planes[i].state); |
| state->planes[i].ptr = NULL; |
| state->planes[i].state = NULL; |
| state->planes[i].old_state = NULL; |
| state->planes[i].new_state = NULL; |
| } |
| |
| for (i = 0; i < state->num_private_objs; i++) { |
| struct drm_private_obj *obj = state->private_objs[i].ptr; |
| |
| obj->funcs->atomic_destroy_state(obj, |
| state->private_objs[i].state); |
| state->private_objs[i].ptr = NULL; |
| state->private_objs[i].state = NULL; |
| state->private_objs[i].old_state = NULL; |
| state->private_objs[i].new_state = NULL; |
| } |
| state->num_private_objs = 0; |
| |
| if (state->fake_commit) { |
| drm_crtc_commit_put(state->fake_commit); |
| state->fake_commit = NULL; |
| } |
| } |
| EXPORT_SYMBOL(drm_atomic_state_default_clear); |
| |
| /** |
| * drm_atomic_state_clear - clear state object |
| * @state: atomic state |
| * |
| * When the w/w mutex algorithm detects a deadlock we need to back off and drop |
| * all locks. So someone else could sneak in and change the current modeset |
| * configuration. Which means that all the state assembled in @state is no |
| * longer an atomic update to the current state, but to some arbitrary earlier |
| * state. Which could break assumptions the driver's |
| * &drm_mode_config_funcs.atomic_check likely relies on. |
| * |
| * Hence we must clear all cached state and completely start over, using this |
| * function. |
| */ |
| void drm_atomic_state_clear(struct drm_atomic_state *state) |
| { |
| struct drm_device *dev = state->dev; |
| struct drm_mode_config *config = &dev->mode_config; |
| |
| if (config->funcs->atomic_state_clear) |
| config->funcs->atomic_state_clear(state); |
| else |
| drm_atomic_state_default_clear(state); |
| } |
| EXPORT_SYMBOL(drm_atomic_state_clear); |
| |
| /** |
| * __drm_atomic_state_free - free all memory for an atomic state |
| * @ref: This atomic state to deallocate |
| * |
| * This frees all memory associated with an atomic state, including all the |
| * per-object state for planes, CRTCs and connectors. |
| */ |
| void __drm_atomic_state_free(struct kref *ref) |
| { |
| struct drm_atomic_state *state = container_of(ref, typeof(*state), ref); |
| struct drm_mode_config *config = &state->dev->mode_config; |
| |
| drm_atomic_state_clear(state); |
| |
| drm_dbg_atomic(state->dev, "Freeing atomic state %p\n", state); |
| |
| if (config->funcs->atomic_state_free) { |
| config->funcs->atomic_state_free(state); |
| } else { |
| drm_atomic_state_default_release(state); |
| kfree(state); |
| } |
| } |
| EXPORT_SYMBOL(__drm_atomic_state_free); |
| |
| /** |
| * drm_atomic_get_crtc_state - get CRTC state |
| * @state: global atomic state object |
| * @crtc: CRTC to get state object for |
| * |
| * This function returns the CRTC state for the given CRTC, allocating it if |
| * needed. It will also grab the relevant CRTC lock to make sure that the state |
| * is consistent. |
| * |
| * WARNING: Drivers may only add new CRTC states to a @state if |
| * drm_atomic_state.allow_modeset is set, or if it's a driver-internal commit |
| * not created by userspace through an IOCTL call. |
| * |
| * Returns: |
| * |
| * Either the allocated state or the error code encoded into the pointer. When |
| * the error is EDEADLK then the w/w mutex code has detected a deadlock and the |
| * entire atomic sequence must be restarted. All other errors are fatal. |
| */ |
| struct drm_crtc_state * |
| drm_atomic_get_crtc_state(struct drm_atomic_state *state, |
| struct drm_crtc *crtc) |
| { |
| int ret, index = drm_crtc_index(crtc); |
| struct drm_crtc_state *crtc_state; |
| |
| WARN_ON(!state->acquire_ctx); |
| |
| crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); |
| if (crtc_state) |
| return crtc_state; |
| |
| ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx); |
| if (ret) |
| return ERR_PTR(ret); |
| |
| crtc_state = crtc->funcs->atomic_duplicate_state(crtc); |
| if (!crtc_state) |
| return ERR_PTR(-ENOMEM); |
| |
| state->crtcs[index].state = crtc_state; |
| state->crtcs[index].old_state = crtc->state; |
| state->crtcs[index].new_state = crtc_state; |
| state->crtcs[index].ptr = crtc; |
| crtc_state->state = state; |
| |
| drm_dbg_atomic(state->dev, "Added [CRTC:%d:%s] %p state to %p\n", |
| crtc->base.id, crtc->name, crtc_state, state); |
| |
| return crtc_state; |
| } |
| EXPORT_SYMBOL(drm_atomic_get_crtc_state); |
| |
| static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state, |
| const struct drm_crtc_state *new_crtc_state) |
| { |
| struct drm_crtc *crtc = new_crtc_state->crtc; |
| |
| /* NOTE: we explicitly don't enforce constraints such as primary |
| * layer covering entire screen, since that is something we want |
| * to allow (on hw that supports it). For hw that does not, it |
| * should be checked in driver's crtc->atomic_check() vfunc. |
| * |
| * TODO: Add generic modeset state checks once we support those. |
| */ |
| |
| if (new_crtc_state->active && !new_crtc_state->enable) { |
| drm_dbg_atomic(crtc->dev, |
| "[CRTC:%d:%s] active without enabled\n", |
| crtc->base.id, crtc->name); |
| return -EINVAL; |
| } |
| |
| /* The state->enable vs. state->mode_blob checks can be WARN_ON, |
| * as this is a kernel-internal detail that userspace should never |
| * be able to trigger. |
| */ |
| if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && |
| WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) { |
| drm_dbg_atomic(crtc->dev, |
| "[CRTC:%d:%s] enabled without mode blob\n", |
| crtc->base.id, crtc->name); |
| return -EINVAL; |
| } |
| |
| if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && |
| WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) { |
| drm_dbg_atomic(crtc->dev, |
| "[CRTC:%d:%s] disabled with mode blob\n", |
| crtc->base.id, crtc->name); |
| return -EINVAL; |
| } |
| |
| /* |
| * Reject event generation for when a CRTC is off and stays off. |
| * It wouldn't be hard to implement this, but userspace has a track |
| * record of happily burning through 100% cpu (or worse, crash) when the |
| * display pipe is suspended. To avoid all that fun just reject updates |
| * that ask for events since likely that indicates a bug in the |
| * compositor's drawing loop. This is consistent with the vblank IOCTL |
| * and legacy page_flip IOCTL which also reject service on a disabled |
| * pipe. |
| */ |
| if (new_crtc_state->event && |
| !new_crtc_state->active && !old_crtc_state->active) { |
| drm_dbg_atomic(crtc->dev, |
| "[CRTC:%d:%s] requesting event but off\n", |
| crtc->base.id, crtc->name); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static void drm_atomic_crtc_print_state(struct drm_printer *p, |
| const struct drm_crtc_state *state) |
| { |
| struct drm_crtc *crtc = state->crtc; |
| |
| drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name); |
| drm_printf(p, "\tenable=%d\n", state->enable); |
| drm_printf(p, "\tactive=%d\n", state->active); |
| drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active); |
| drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed); |
| drm_printf(p, "\tmode_changed=%d\n", state->mode_changed); |
| drm_printf(p, "\tactive_changed=%d\n", state->active_changed); |
| drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed); |
| drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed); |
| drm_printf(p, "\tplane_mask=%x\n", state->plane_mask); |
| drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask); |
| drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask); |
| drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode)); |
| |
| if (crtc->funcs->atomic_print_state) |
| crtc->funcs->atomic_print_state(p, state); |
| } |
| |
| static int drm_atomic_connector_check(struct drm_connector *connector, |
| struct drm_connector_state *state) |
| { |
| struct drm_crtc_state *crtc_state; |
| struct drm_writeback_job *writeback_job = state->writeback_job; |
| const struct drm_display_info *info = &connector->display_info; |
| |
| state->max_bpc = info->bpc ? info->bpc : 8; |
| if (connector->max_bpc_property) |
| state->max_bpc = min(state->max_bpc, state->max_requested_bpc); |
| |
| if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job) |
| return 0; |
| |
| if (writeback_job->fb && !state->crtc) { |
| drm_dbg_atomic(connector->dev, |
| "[CONNECTOR:%d:%s] framebuffer without CRTC\n", |
| connector->base.id, connector->name); |
| return -EINVAL; |
| } |
| |
| if (state->crtc) |
| crtc_state = drm_atomic_get_existing_crtc_state(state->state, |
| state->crtc); |
| |
| if (writeback_job->fb && !crtc_state->active) { |
| drm_dbg_atomic(connector->dev, |
| "[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n", |
| connector->base.id, connector->name, |
| state->crtc->base.id); |
| return -EINVAL; |
| } |
| |
| if (!writeback_job->fb) { |
| if (writeback_job->out_fence) { |
| drm_dbg_atomic(connector->dev, |
| "[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n", |
| connector->base.id, connector->name); |
| return -EINVAL; |
| } |
| |
| drm_writeback_cleanup_job(writeback_job); |
| state->writeback_job = NULL; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * drm_atomic_get_plane_state - get plane state |
| * @state: global atomic state object |
| * @plane: plane to get state object for |
| * |
| * This function returns the plane state for the given plane, allocating it if |
| * needed. It will also grab the relevant plane lock to make sure that the state |
| * is consistent. |
| * |
| * Returns: |
| * |
| * Either the allocated state or the error code encoded into the pointer. When |
| * the error is EDEADLK then the w/w mutex code has detected a deadlock and the |
| * entire atomic sequence must be restarted. All other errors are fatal. |
| */ |
| struct drm_plane_state * |
| drm_atomic_get_plane_state(struct drm_atomic_state *state, |
| struct drm_plane *plane) |
| { |
| int ret, index = drm_plane_index(plane); |
| struct drm_plane_state *plane_state; |
| |
| WARN_ON(!state->acquire_ctx); |
| |
| /* the legacy pointers should never be set */ |
| WARN_ON(plane->fb); |
| WARN_ON(plane->old_fb); |
| WARN_ON(plane->crtc); |
| |
| plane_state = drm_atomic_get_existing_plane_state(state, plane); |
| if (plane_state) |
| return plane_state; |
| |
| ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx); |
| if (ret) |
| return ERR_PTR(ret); |
| |
| plane_state = plane->funcs->atomic_duplicate_state(plane); |
| if (!plane_state) |
| return ERR_PTR(-ENOMEM); |
| |
| state->planes[index].state = plane_state; |
| state->planes[index].ptr = plane; |
| state->planes[index].old_state = plane->state; |
| state->planes[index].new_state = plane_state; |
| plane_state->state = state; |
| |
| drm_dbg_atomic(plane->dev, "Added [PLANE:%d:%s] %p state to %p\n", |
| plane->base.id, plane->name, plane_state, state); |
| |
| if (plane_state->crtc) { |
| struct drm_crtc_state *crtc_state; |
| |
| crtc_state = drm_atomic_get_crtc_state(state, |
| plane_state->crtc); |
| if (IS_ERR(crtc_state)) |
| return ERR_CAST(crtc_state); |
| } |
| |
| return plane_state; |
| } |
| EXPORT_SYMBOL(drm_atomic_get_plane_state); |
| |
| static bool |
| plane_switching_crtc(const struct drm_plane_state *old_plane_state, |
| const struct drm_plane_state *new_plane_state) |
| { |
| if (!old_plane_state->crtc || !new_plane_state->crtc) |
| return false; |
| |
| if (old_plane_state->crtc == new_plane_state->crtc) |
| return false; |
| |
| /* This could be refined, but currently there's no helper or driver code |
| * to implement direct switching of active planes nor userspace to take |
| * advantage of more direct plane switching without the intermediate |
| * full OFF state. |
| */ |
| return true; |
| } |
| |
| /** |
| * drm_atomic_plane_check - check plane state |
| * @old_plane_state: old plane state to check |
| * @new_plane_state: new plane state to check |
| * |
| * Provides core sanity checks for plane state. |
| * |
| * RETURNS: |
| * Zero on success, error code on failure |
| */ |
| static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state, |
| const struct drm_plane_state *new_plane_state) |
| { |
| struct drm_plane *plane = new_plane_state->plane; |
| struct drm_crtc *crtc = new_plane_state->crtc; |
| const struct drm_framebuffer *fb = new_plane_state->fb; |
| unsigned int fb_width, fb_height; |
| struct drm_mode_rect *clips; |
| uint32_t num_clips; |
| int ret; |
| |
| /* either *both* CRTC and FB must be set, or neither */ |
| if (crtc && !fb) { |
| drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] CRTC set but no FB\n", |
| plane->base.id, plane->name); |
| return -EINVAL; |
| } else if (fb && !crtc) { |
| drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] FB set but no CRTC\n", |
| plane->base.id, plane->name); |
| return -EINVAL; |
| } |
| |
| /* if disabled, we don't care about the rest of the state: */ |
| if (!crtc) |
| return 0; |
| |
| /* Check whether this plane is usable on this CRTC */ |
| if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { |
| drm_dbg_atomic(plane->dev, |
| "Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n", |
| crtc->base.id, crtc->name, |
| plane->base.id, plane->name); |
| return -EINVAL; |
| } |
| |
| /* Check whether this plane supports the fb pixel format. */ |
| ret = drm_plane_check_pixel_format(plane, fb->format->format, |
| fb->modifier); |
| if (ret) { |
| drm_dbg_atomic(plane->dev, |
| "[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n", |
| plane->base.id, plane->name, |
| &fb->format->format, fb->modifier); |
| return ret; |
| } |
| |
| /* Give drivers some help against integer overflows */ |
| if (new_plane_state->crtc_w > INT_MAX || |
| new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w || |
| new_plane_state->crtc_h > INT_MAX || |
| new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) { |
| drm_dbg_atomic(plane->dev, |
| "[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n", |
| plane->base.id, plane->name, |
| new_plane_state->crtc_w, new_plane_state->crtc_h, |
| new_plane_state->crtc_x, new_plane_state->crtc_y); |
| return -ERANGE; |
| } |
| |
| fb_width = fb->width << 16; |
| fb_height = fb->height << 16; |
| |
| /* Make sure source coordinates are inside the fb. */ |
| if (new_plane_state->src_w > fb_width || |
| new_plane_state->src_x > fb_width - new_plane_state->src_w || |
| new_plane_state->src_h > fb_height || |
| new_plane_state->src_y > fb_height - new_plane_state->src_h) { |
| drm_dbg_atomic(plane->dev, |
| "[PLANE:%d:%s] invalid source coordinates " |
| "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n", |
| plane->base.id, plane->name, |
| new_plane_state->src_w >> 16, |
| ((new_plane_state->src_w & 0xffff) * 15625) >> 10, |
| new_plane_state->src_h >> 16, |
| ((new_plane_state->src_h & 0xffff) * 15625) >> 10, |
| new_plane_state->src_x >> 16, |
| ((new_plane_state->src_x & 0xffff) * 15625) >> 10, |
| new_plane_state->src_y >> 16, |
| ((new_plane_state->src_y & 0xffff) * 15625) >> 10, |
| fb->width, fb->height); |
| return -ENOSPC; |
| } |
| |
| clips = __drm_plane_get_damage_clips(new_plane_state); |
| num_clips = drm_plane_get_damage_clips_count(new_plane_state); |
| |
| /* Make sure damage clips are valid and inside the fb. */ |
| while (num_clips > 0) { |
| if (clips->x1 >= clips->x2 || |
| clips->y1 >= clips->y2 || |
| clips->x1 < 0 || |
| clips->y1 < 0 || |
| clips->x2 > fb_width || |
| clips->y2 > fb_height) { |
| drm_dbg_atomic(plane->dev, |
| "[PLANE:%d:%s] invalid damage clip %d %d %d %d\n", |
| plane->base.id, plane->name, clips->x1, |
| clips->y1, clips->x2, clips->y2); |
| return -EINVAL; |
| } |
| clips++; |
| num_clips--; |
| } |
| |
| if (plane_switching_crtc(old_plane_state, new_plane_state)) { |
| drm_dbg_atomic(plane->dev, |
| "[PLANE:%d:%s] switching CRTC directly\n", |
| plane->base.id, plane->name); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static void drm_atomic_plane_print_state(struct drm_printer *p, |
| const struct drm_plane_state *state) |
| { |
| struct drm_plane *plane = state->plane; |
| struct drm_rect src = drm_plane_state_src(state); |
| struct drm_rect dest = drm_plane_state_dest(state); |
| |
| drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name); |
| drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); |
| drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0); |
| if (state->fb) |
| drm_framebuffer_print_info(p, 2, state->fb); |
| drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest)); |
| drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src)); |
| drm_printf(p, "\trotation=%x\n", state->rotation); |
| drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos); |
| drm_printf(p, "\tcolor-encoding=%s\n", |
| drm_get_color_encoding_name(state->color_encoding)); |
| drm_printf(p, "\tcolor-range=%s\n", |
| drm_get_color_range_name(state->color_range)); |
| |
| if (plane->funcs->atomic_print_state) |
| plane->funcs->atomic_print_state(p, state); |
| } |
| |
| /** |
| * DOC: handling driver private state |
| * |
| * Very often the DRM objects exposed to userspace in the atomic modeset api |
| * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the |
| * underlying hardware. Especially for any kind of shared resources (e.g. shared |
| * clocks, scaler units, bandwidth and fifo limits shared among a group of |
| * planes or CRTCs, and so on) it makes sense to model these as independent |
| * objects. Drivers then need to do similar state tracking and commit ordering for |
| * such private (since not exposed to userspace) objects as the atomic core and |
| * helpers already provide for connectors, planes and CRTCs. |
| * |
| * To make this easier on drivers the atomic core provides some support to track |
| * driver private state objects using struct &drm_private_obj, with the |
| * associated state struct &drm_private_state. |
| * |
| * Similar to userspace-exposed objects, private state structures can be |
| * acquired by calling drm_atomic_get_private_obj_state(). This also takes care |
| * of locking, hence drivers should not have a need to call drm_modeset_lock() |
| * directly. Sequence of the actual hardware state commit is not handled, |
| * drivers might need to keep track of struct drm_crtc_commit within subclassed |
| * structure of &drm_private_state as necessary, e.g. similar to |
| * &drm_plane_state.commit. See also &drm_atomic_state.fake_commit. |
| * |
| * All private state structures contained in a &drm_atomic_state update can be |
| * iterated using for_each_oldnew_private_obj_in_state(), |
| * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state(). |
| * Drivers are recommended to wrap these for each type of driver private state |
| * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at |
| * least if they want to iterate over all objects of a given type. |
| * |
| * An earlier way to handle driver private state was by subclassing struct |
| * &drm_atomic_state. But since that encourages non-standard ways to implement |
| * the check/commit split atomic requires (by using e.g. "check and rollback or |
| * commit instead" of "duplicate state, check, then either commit or release |
| * duplicated state) it is deprecated in favour of using &drm_private_state. |
| */ |
| |
| /** |
| * drm_atomic_private_obj_init - initialize private object |
| * @dev: DRM device this object will be attached to |
| * @obj: private object |
| * @state: initial private object state |
| * @funcs: pointer to the struct of function pointers that identify the object |
| * type |
| * |
| * Initialize the private object, which can be embedded into any |
| * driver private object that needs its own atomic state. |
| */ |
| void |
| drm_atomic_private_obj_init(struct drm_device *dev, |
| struct drm_private_obj *obj, |
| struct drm_private_state *state, |
| const struct drm_private_state_funcs *funcs) |
| { |
| memset(obj, 0, sizeof(*obj)); |
| |
| drm_modeset_lock_init(&obj->lock); |
| |
| obj->state = state; |
| obj->funcs = funcs; |
| list_add_tail(&obj->head, &dev->mode_config.privobj_list); |
| |
| state->obj = obj; |
| } |
| EXPORT_SYMBOL(drm_atomic_private_obj_init); |
| |
| /** |
| * drm_atomic_private_obj_fini - finalize private object |
| * @obj: private object |
| * |
| * Finalize the private object. |
| */ |
| void |
| drm_atomic_private_obj_fini(struct drm_private_obj *obj) |
| { |
| list_del(&obj->head); |
| obj->funcs->atomic_destroy_state(obj, obj->state); |
| drm_modeset_lock_fini(&obj->lock); |
| } |
| EXPORT_SYMBOL(drm_atomic_private_obj_fini); |
| |
| /** |
| * drm_atomic_get_private_obj_state - get private object state |
| * @state: global atomic state |
| * @obj: private object to get the state for |
| * |
| * This function returns the private object state for the given private object, |
| * allocating the state if needed. It will also grab the relevant private |
| * object lock to make sure that the state is consistent. |
| * |
| * RETURNS: |
| * |
| * Either the allocated state or the error code encoded into a pointer. |
| */ |
| struct drm_private_state * |
| drm_atomic_get_private_obj_state(struct drm_atomic_state *state, |
| struct drm_private_obj *obj) |
| { |
| int index, num_objs, i, ret; |
| size_t size; |
| struct __drm_private_objs_state *arr; |
| struct drm_private_state *obj_state; |
| |
| for (i = 0; i < state->num_private_objs; i++) |
| if (obj == state->private_objs[i].ptr) |
| return state->private_objs[i].state; |
| |
| ret = drm_modeset_lock(&obj->lock, state->acquire_ctx); |
| if (ret) |
| return ERR_PTR(ret); |
| |
| num_objs = state->num_private_objs + 1; |
| size = sizeof(*state->private_objs) * num_objs; |
| arr = krealloc(state->private_objs, size, GFP_KERNEL); |
| if (!arr) |
| return ERR_PTR(-ENOMEM); |
| |
| state->private_objs = arr; |
| index = state->num_private_objs; |
| memset(&state->private_objs[index], 0, sizeof(*state->private_objs)); |
| |
| obj_state = obj->funcs->atomic_duplicate_state(obj); |
| if (!obj_state) |
| return ERR_PTR(-ENOMEM); |
| |
| state->private_objs[index].state = obj_state; |
| state->private_objs[index].old_state = obj->state; |
| state->private_objs[index].new_state = obj_state; |
| state->private_objs[index].ptr = obj; |
| obj_state->state = state; |
| |
| state->num_private_objs = num_objs; |
| |
| drm_dbg_atomic(state->dev, |
| "Added new private object %p state %p to %p\n", |
| obj, obj_state, state); |
| |
| return obj_state; |
| } |
| EXPORT_SYMBOL(drm_atomic_get_private_obj_state); |
| |
| /** |
| * drm_atomic_get_old_private_obj_state |
| * @state: global atomic state object |
| * @obj: private_obj to grab |
| * |
| * This function returns the old private object state for the given private_obj, |
| * or NULL if the private_obj is not part of the global atomic state. |
| */ |
| struct drm_private_state * |
| drm_atomic_get_old_private_obj_state(const struct drm_atomic_state *state, |
| struct drm_private_obj *obj) |
| { |
| int i; |
| |
| for (i = 0; i < state->num_private_objs; i++) |
| if (obj == state->private_objs[i].ptr) |
| return state->private_objs[i].old_state; |
| |
| return NULL; |
| } |
| EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state); |
| |
| /** |
| * drm_atomic_get_new_private_obj_state |
| * @state: global atomic state object |
| * @obj: private_obj to grab |
| * |
| * This function returns the new private object state for the given private_obj, |
| * or NULL if the private_obj is not part of the global atomic state. |
| */ |
| struct drm_private_state * |
| drm_atomic_get_new_private_obj_state(const struct drm_atomic_state *state, |
| struct drm_private_obj *obj) |
| { |
| int i; |
| |
| for (i = 0; i < state->num_private_objs; i++) |
| if (obj == state->private_objs[i].ptr) |
| return state->private_objs[i].new_state; |
| |
| return NULL; |
| } |
| EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state); |
| |
| /** |
| * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder |
| * @state: Atomic state |
| * @encoder: The encoder to fetch the connector state for |
| * |
| * This function finds and returns the connector that was connected to @encoder |
| * as specified by the @state. |
| * |
| * If there is no connector in @state which previously had @encoder connected to |
| * it, this function will return NULL. While this may seem like an invalid use |
| * case, it is sometimes useful to differentiate commits which had no prior |
| * connectors attached to @encoder vs ones that did (and to inspect their |
| * state). This is especially true in enable hooks because the pipeline has |
| * changed. |
| * |
| * Returns: The old connector connected to @encoder, or NULL if the encoder is |
| * not connected. |
| */ |
| struct drm_connector * |
| drm_atomic_get_old_connector_for_encoder(const struct drm_atomic_state *state, |
| struct drm_encoder *encoder) |
| { |
| struct drm_connector_state *conn_state; |
| struct drm_connector *connector; |
| unsigned int i; |
| |
| for_each_old_connector_in_state(state, connector, conn_state, i) { |
| if (conn_state->best_encoder == encoder) |
| return connector; |
| } |
| |
| return NULL; |
| } |
| EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder); |
| |
| /** |
| * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder |
| * @state: Atomic state |
| * @encoder: The encoder to fetch the connector state for |
| * |
| * This function finds and returns the connector that will be connected to |
| * @encoder as specified by the @state. |
| * |
| * If there is no connector in @state which will have @encoder connected to it, |
| * this function will return NULL. While this may seem like an invalid use case, |
| * it is sometimes useful to differentiate commits which have no connectors |
| * attached to @encoder vs ones that do (and to inspect their state). This is |
| * especially true in disable hooks because the pipeline will change. |
| * |
| * Returns: The new connector connected to @encoder, or NULL if the encoder is |
| * not connected. |
| */ |
| struct drm_connector * |
| drm_atomic_get_new_connector_for_encoder(const struct drm_atomic_state *state, |
| struct drm_encoder *encoder) |
| { |
| struct drm_connector_state *conn_state; |
| struct drm_connector *connector; |
| unsigned int i; |
| |
| for_each_new_connector_in_state(state, connector, conn_state, i) { |
| if (conn_state->best_encoder == encoder) |
| return connector; |
| } |
| |
| return NULL; |
| } |
| EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder); |
| |
| /** |
| * drm_atomic_get_connector_state - get connector state |
| * @state: global atomic state object |
| * @connector: connector to get state object for |
| * |
| * This function returns the connector state for the given connector, |
| * allocating it if needed. It will also grab the relevant connector lock to |
| * make sure that the state is consistent. |
| * |
| * Returns: |
| * |
| * Either the allocated state or the error code encoded into the pointer. When |
| * the error is EDEADLK then the w/w mutex code has detected a deadlock and the |
| * entire atomic sequence must be restarted. All other errors are fatal. |
| */ |
| struct drm_connector_state * |
| drm_atomic_get_connector_state(struct drm_atomic_state *state, |
| struct drm_connector *connector) |
| { |
| int ret, index; |
| struct drm_mode_config *config = &connector->dev->mode_config; |
| struct drm_connector_state *connector_state; |
| |
| WARN_ON(!state->acquire_ctx); |
| |
| ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); |
| if (ret) |
| return ERR_PTR(ret); |
| |
| index = drm_connector_index(connector); |
| |
| if (index >= state->num_connector) { |
| struct __drm_connnectors_state *c; |
| int alloc = max(index + 1, config->num_connector); |
| |
| c = krealloc_array(state->connectors, alloc, |
| sizeof(*state->connectors), GFP_KERNEL); |
| if (!c) |
| return ERR_PTR(-ENOMEM); |
| |
| state->connectors = c; |
| memset(&state->connectors[state->num_connector], 0, |
| sizeof(*state->connectors) * (alloc - state->num_connector)); |
| |
| state->num_connector = alloc; |
| } |
| |
| if (state->connectors[index].state) |
| return state->connectors[index].state; |
| |
| connector_state = connector->funcs->atomic_duplicate_state(connector); |
| if (!connector_state) |
| return ERR_PTR(-ENOMEM); |
| |
| drm_connector_get(connector); |
| state->connectors[index].state = connector_state; |
| state->connectors[index].old_state = connector->state; |
| state->connectors[index].new_state = connector_state; |
| state->connectors[index].ptr = connector; |
| connector_state->state = state; |
| |
| drm_dbg_atomic(connector->dev, "Added [CONNECTOR:%d:%s] %p state to %p\n", |
| connector->base.id, connector->name, |
| connector_state, state); |
| |
| if (connector_state->crtc) { |
| struct drm_crtc_state *crtc_state; |
| |
| crtc_state = drm_atomic_get_crtc_state(state, |
| connector_state->crtc); |
| if (IS_ERR(crtc_state)) |
| return ERR_CAST(crtc_state); |
| } |
| |
| return connector_state; |
| } |
| EXPORT_SYMBOL(drm_atomic_get_connector_state); |
| |
| static void drm_atomic_connector_print_state(struct drm_printer *p, |
| const struct drm_connector_state *state) |
| { |
| struct drm_connector *connector = state->connector; |
| |
| drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name); |
| drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); |
| drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware); |
| |
| if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) |
| if (state->writeback_job && state->writeback_job->fb) |
| drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id); |
| |
| if (connector->funcs->atomic_print_state) |
| connector->funcs->atomic_print_state(p, state); |
| } |
| |
| /** |
| * drm_atomic_get_bridge_state - get bridge state |
| * @state: global atomic state object |
| * @bridge: bridge to get state object for |
| * |
| * This function returns the bridge state for the given bridge, allocating it |
| * if needed. It will also grab the relevant bridge lock to make sure that the |
| * state is consistent. |
| * |
| * Returns: |
| * |
| * Either the allocated state or the error code encoded into the pointer. When |
| * the error is EDEADLK then the w/w mutex code has detected a deadlock and the |
| * entire atomic sequence must be restarted. |
| */ |
| struct drm_bridge_state * |
| drm_atomic_get_bridge_state(struct drm_atomic_state *state, |
| struct drm_bridge *bridge) |
| { |
| struct drm_private_state *obj_state; |
| |
| obj_state = drm_atomic_get_private_obj_state(state, &bridge->base); |
| if (IS_ERR(obj_state)) |
| return ERR_CAST(obj_state); |
| |
| return drm_priv_to_bridge_state(obj_state); |
| } |
| EXPORT_SYMBOL(drm_atomic_get_bridge_state); |
| |
| /** |
| * drm_atomic_get_old_bridge_state - get old bridge state, if it exists |
| * @state: global atomic state object |
| * @bridge: bridge to grab |
| * |
| * This function returns the old bridge state for the given bridge, or NULL if |
| * the bridge is not part of the global atomic state. |
| */ |
| struct drm_bridge_state * |
| drm_atomic_get_old_bridge_state(const struct drm_atomic_state *state, |
| struct drm_bridge *bridge) |
| { |
| struct drm_private_state *obj_state; |
| |
| obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base); |
| if (!obj_state) |
| return NULL; |
| |
| return drm_priv_to_bridge_state(obj_state); |
| } |
| EXPORT_SYMBOL(drm_atomic_get_old_bridge_state); |
| |
| /** |
| * drm_atomic_get_new_bridge_state - get new bridge state, if it exists |
| * @state: global atomic state object |
| * @bridge: bridge to grab |
| * |
| * This function returns the new bridge state for the given bridge, or NULL if |
| * the bridge is not part of the global atomic state. |
| */ |
| struct drm_bridge_state * |
| drm_atomic_get_new_bridge_state(const struct drm_atomic_state *state, |
| struct drm_bridge *bridge) |
| { |
| struct drm_private_state *obj_state; |
| |
| obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base); |
| if (!obj_state) |
| return NULL; |
| |
| return drm_priv_to_bridge_state(obj_state); |
| } |
| EXPORT_SYMBOL(drm_atomic_get_new_bridge_state); |
| |
| /** |
| * drm_atomic_add_encoder_bridges - add bridges attached to an encoder |
| * @state: atomic state |
| * @encoder: DRM encoder |
| * |
| * This function adds all bridges attached to @encoder. This is needed to add |
| * bridge states to @state and make them available when |
| * &drm_bridge_funcs.atomic_check(), &drm_bridge_funcs.atomic_pre_enable(), |
| * &drm_bridge_funcs.atomic_enable(), |
| * &drm_bridge_funcs.atomic_disable_post_disable() are called. |
| * |
| * Returns: |
| * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK |
| * then the w/w mutex code has detected a deadlock and the entire atomic |
| * sequence must be restarted. All other errors are fatal. |
| */ |
| int |
| drm_atomic_add_encoder_bridges(struct drm_atomic_state *state, |
| struct drm_encoder *encoder) |
| { |
| struct drm_bridge_state *bridge_state; |
| struct drm_bridge *bridge; |
| |
| if (!encoder) |
| return 0; |
| |
| drm_dbg_atomic(encoder->dev, |
| "Adding all bridges for [encoder:%d:%s] to %p\n", |
| encoder->base.id, encoder->name, state); |
| |
| drm_for_each_bridge_in_chain(encoder, bridge) { |
| /* Skip bridges that don't implement the atomic state hooks. */ |
| if (!bridge->funcs->atomic_duplicate_state) |
| continue; |
| |
| bridge_state = drm_atomic_get_bridge_state(state, bridge); |
| if (IS_ERR(bridge_state)) |
| return PTR_ERR(bridge_state); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_atomic_add_encoder_bridges); |
| |
| /** |
| * drm_atomic_add_affected_connectors - add connectors for CRTC |
| * @state: atomic state |
| * @crtc: DRM CRTC |
| * |
| * This function walks the current configuration and adds all connectors |
| * currently using @crtc to the atomic configuration @state. Note that this |
| * function must acquire the connection mutex. This can potentially cause |
| * unneeded serialization if the update is just for the planes on one CRTC. Hence |
| * drivers and helpers should only call this when really needed (e.g. when a |
| * full modeset needs to happen due to some change). |
| * |
| * Returns: |
| * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK |
| * then the w/w mutex code has detected a deadlock and the entire atomic |
| * sequence must be restarted. All other errors are fatal. |
| */ |
| int |
| drm_atomic_add_affected_connectors(struct drm_atomic_state *state, |
| struct drm_crtc *crtc) |
| { |
| struct drm_mode_config *config = &state->dev->mode_config; |
| struct drm_connector *connector; |
| struct drm_connector_state *conn_state; |
| struct drm_connector_list_iter conn_iter; |
| struct drm_crtc_state *crtc_state; |
| int ret; |
| |
| crtc_state = drm_atomic_get_crtc_state(state, crtc); |
| if (IS_ERR(crtc_state)) |
| return PTR_ERR(crtc_state); |
| |
| ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); |
| if (ret) |
| return ret; |
| |
| drm_dbg_atomic(crtc->dev, |
| "Adding all current connectors for [CRTC:%d:%s] to %p\n", |
| crtc->base.id, crtc->name, state); |
| |
| /* |
| * Changed connectors are already in @state, so only need to look |
| * at the connector_mask in crtc_state. |
| */ |
| drm_connector_list_iter_begin(state->dev, &conn_iter); |
| drm_for_each_connector_iter(connector, &conn_iter) { |
| if (!(crtc_state->connector_mask & drm_connector_mask(connector))) |
| continue; |
| |
| conn_state = drm_atomic_get_connector_state(state, connector); |
| if (IS_ERR(conn_state)) { |
| drm_connector_list_iter_end(&conn_iter); |
| return PTR_ERR(conn_state); |
| } |
| } |
| drm_connector_list_iter_end(&conn_iter); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_atomic_add_affected_connectors); |
| |
| /** |
| * drm_atomic_add_affected_planes - add planes for CRTC |
| * @state: atomic state |
| * @crtc: DRM CRTC |
| * |
| * This function walks the current configuration and adds all planes |
| * currently used by @crtc to the atomic configuration @state. This is useful |
| * when an atomic commit also needs to check all currently enabled plane on |
| * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC |
| * to avoid special code to force-enable all planes. |
| * |
| * Since acquiring a plane state will always also acquire the w/w mutex of the |
| * current CRTC for that plane (if there is any) adding all the plane states for |
| * a CRTC will not reduce parallelism of atomic updates. |
| * |
| * Returns: |
| * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK |
| * then the w/w mutex code has detected a deadlock and the entire atomic |
| * sequence must be restarted. All other errors are fatal. |
| */ |
| int |
| drm_atomic_add_affected_planes(struct drm_atomic_state *state, |
| struct drm_crtc *crtc) |
| { |
| const struct drm_crtc_state *old_crtc_state = |
| drm_atomic_get_old_crtc_state(state, crtc); |
| struct drm_plane *plane; |
| |
| WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc)); |
| |
| drm_dbg_atomic(crtc->dev, |
| "Adding all current planes for [CRTC:%d:%s] to %p\n", |
| crtc->base.id, crtc->name, state); |
| |
| drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) { |
| struct drm_plane_state *plane_state = |
| drm_atomic_get_plane_state(state, plane); |
| |
| if (IS_ERR(plane_state)) |
| return PTR_ERR(plane_state); |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_atomic_add_affected_planes); |
| |
| /** |
| * drm_atomic_check_only - check whether a given config would work |
| * @state: atomic configuration to check |
| * |
| * Note that this function can return -EDEADLK if the driver needed to acquire |
| * more locks but encountered a deadlock. The caller must then do the usual w/w |
| * backoff dance and restart. All other errors are fatal. |
| * |
| * Returns: |
| * 0 on success, negative error code on failure. |
| */ |
| int drm_atomic_check_only(struct drm_atomic_state *state) |
| { |
| struct drm_device *dev = state->dev; |
| struct drm_mode_config *config = &dev->mode_config; |
| struct drm_plane *plane; |
| struct drm_plane_state *old_plane_state; |
| struct drm_plane_state *new_plane_state; |
| struct drm_crtc *crtc; |
| struct drm_crtc_state *old_crtc_state; |
| struct drm_crtc_state *new_crtc_state; |
| struct drm_connector *conn; |
| struct drm_connector_state *conn_state; |
| unsigned int requested_crtc = 0; |
| unsigned int affected_crtc = 0; |
| int i, ret = 0; |
| |
| drm_dbg_atomic(dev, "checking %p\n", state); |
| |
| for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
| if (new_crtc_state->enable) |
| requested_crtc |= drm_crtc_mask(crtc); |
| } |
| |
| for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
| ret = drm_atomic_plane_check(old_plane_state, new_plane_state); |
| if (ret) { |
| drm_dbg_atomic(dev, "[PLANE:%d:%s] atomic core check failed\n", |
| plane->base.id, plane->name); |
| return ret; |
| } |
| } |
| |
| for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
| ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state); |
| if (ret) { |
| drm_dbg_atomic(dev, "[CRTC:%d:%s] atomic core check failed\n", |
| crtc->base.id, crtc->name); |
| return ret; |
| } |
| } |
| |
| for_each_new_connector_in_state(state, conn, conn_state, i) { |
| ret = drm_atomic_connector_check(conn, conn_state); |
| if (ret) { |
| drm_dbg_atomic(dev, "[CONNECTOR:%d:%s] atomic core check failed\n", |
| conn->base.id, conn->name); |
| return ret; |
| } |
| } |
| |
| if (config->funcs->atomic_check) { |
| ret = config->funcs->atomic_check(state->dev, state); |
| |
| if (ret) { |
| drm_dbg_atomic(dev, "atomic driver check for %p failed: %d\n", |
| state, ret); |
| return ret; |
| } |
| } |
| |
| if (!state->allow_modeset) { |
| for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
| if (drm_atomic_crtc_needs_modeset(new_crtc_state)) { |
| drm_dbg_atomic(dev, "[CRTC:%d:%s] requires full modeset\n", |
| crtc->base.id, crtc->name); |
| return -EINVAL; |
| } |
| } |
| } |
| |
| for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
| if (new_crtc_state->enable) |
| affected_crtc |= drm_crtc_mask(crtc); |
| } |
| |
| /* |
| * For commits that allow modesets drivers can add other CRTCs to the |
| * atomic commit, e.g. when they need to reallocate global resources. |
| * This can cause spurious EBUSY, which robs compositors of a very |
| * effective sanity check for their drawing loop. Therefor only allow |
| * drivers to add unrelated CRTC states for modeset commits. |
| * |
| * FIXME: Should add affected_crtc mask to the ATOMIC IOCTL as an output |
| * so compositors know what's going on. |
| */ |
| if (affected_crtc != requested_crtc) { |
| drm_dbg_atomic(dev, |
| "driver added CRTC to commit: requested 0x%x, affected 0x%0x\n", |
| requested_crtc, affected_crtc); |
| WARN(!state->allow_modeset, "adding CRTC not allowed without modesets: requested 0x%x, affected 0x%0x\n", |
| requested_crtc, affected_crtc); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_atomic_check_only); |
| |
| /** |
| * drm_atomic_commit - commit configuration atomically |
| * @state: atomic configuration to check |
| * |
| * Note that this function can return -EDEADLK if the driver needed to acquire |
| * more locks but encountered a deadlock. The caller must then do the usual w/w |
| * backoff dance and restart. All other errors are fatal. |
| * |
| * This function will take its own reference on @state. |
| * Callers should always release their reference with drm_atomic_state_put(). |
| * |
| * Returns: |
| * 0 on success, negative error code on failure. |
| */ |
| int drm_atomic_commit(struct drm_atomic_state *state) |
| { |
| struct drm_mode_config *config = &state->dev->mode_config; |
| struct drm_printer p = drm_info_printer(state->dev->dev); |
| int ret; |
| |
| if (drm_debug_enabled(DRM_UT_STATE)) |
| drm_atomic_print_new_state(state, &p); |
| |
| ret = drm_atomic_check_only(state); |
| if (ret) |
| return ret; |
| |
| drm_dbg_atomic(state->dev, "committing %p\n", state); |
| |
| return config->funcs->atomic_commit(state->dev, state, false); |
| } |
| EXPORT_SYMBOL(drm_atomic_commit); |
| |
| /** |
| * drm_atomic_nonblocking_commit - atomic nonblocking commit |
| * @state: atomic configuration to check |
| * |
| * Note that this function can return -EDEADLK if the driver needed to acquire |
| * more locks but encountered a deadlock. The caller must then do the usual w/w |
| * backoff dance and restart. All other errors are fatal. |
| * |
| * This function will take its own reference on @state. |
| * Callers should always release their reference with drm_atomic_state_put(). |
| * |
| * Returns: |
| * 0 on success, negative error code on failure. |
| */ |
| int drm_atomic_nonblocking_commit(struct drm_atomic_state *state) |
| { |
| struct drm_mode_config *config = &state->dev->mode_config; |
| int ret; |
| |
| ret = drm_atomic_check_only(state); |
| if (ret) |
| return ret; |
| |
| drm_dbg_atomic(state->dev, "committing %p nonblocking\n", state); |
| |
| return config->funcs->atomic_commit(state->dev, state, true); |
| } |
| EXPORT_SYMBOL(drm_atomic_nonblocking_commit); |
| |
| /* just used from drm-client and atomic-helper: */ |
| int __drm_atomic_helper_disable_plane(struct drm_plane *plane, |
| struct drm_plane_state *plane_state) |
| { |
| int ret; |
| |
| ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
| if (ret != 0) |
| return ret; |
| |
| drm_atomic_set_fb_for_plane(plane_state, NULL); |
| plane_state->crtc_x = 0; |
| plane_state->crtc_y = 0; |
| plane_state->crtc_w = 0; |
| plane_state->crtc_h = 0; |
| plane_state->src_x = 0; |
| plane_state->src_y = 0; |
| plane_state->src_w = 0; |
| plane_state->src_h = 0; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(__drm_atomic_helper_disable_plane); |
| |
| static int update_output_state(struct drm_atomic_state *state, |
| struct drm_mode_set *set) |
| { |
| struct drm_device *dev = set->crtc->dev; |
| struct drm_crtc *crtc; |
| struct drm_crtc_state *new_crtc_state; |
| struct drm_connector *connector; |
| struct drm_connector_state *new_conn_state; |
| int ret, i; |
| |
| ret = drm_modeset_lock(&dev->mode_config.connection_mutex, |
| state->acquire_ctx); |
| if (ret) |
| return ret; |
| |
| /* First disable all connectors on the target crtc. */ |
| ret = drm_atomic_add_affected_connectors(state, set->crtc); |
| if (ret) |
| return ret; |
| |
| for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
| if (new_conn_state->crtc == set->crtc) { |
| ret = drm_atomic_set_crtc_for_connector(new_conn_state, |
| NULL); |
| if (ret) |
| return ret; |
| |
| /* Make sure legacy setCrtc always re-trains */ |
| new_conn_state->link_status = DRM_LINK_STATUS_GOOD; |
| } |
| } |
| |
| /* Then set all connectors from set->connectors on the target crtc */ |
| for (i = 0; i < set->num_connectors; i++) { |
| new_conn_state = drm_atomic_get_connector_state(state, |
| set->connectors[i]); |
| if (IS_ERR(new_conn_state)) |
| return PTR_ERR(new_conn_state); |
| |
| ret = drm_atomic_set_crtc_for_connector(new_conn_state, |
| set->crtc); |
| if (ret) |
| return ret; |
| } |
| |
| for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
| /* |
| * Don't update ->enable for the CRTC in the set_config request, |
| * since a mismatch would indicate a bug in the upper layers. |
| * The actual modeset code later on will catch any |
| * inconsistencies here. |
| */ |
| if (crtc == set->crtc) |
| continue; |
| |
| if (!new_crtc_state->connector_mask) { |
| ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state, |
| NULL); |
| if (ret < 0) |
| return ret; |
| |
| new_crtc_state->active = false; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* just used from drm-client and atomic-helper: */ |
| int __drm_atomic_helper_set_config(struct drm_mode_set *set, |
| struct drm_atomic_state *state) |
| { |
| struct drm_crtc_state *crtc_state; |
| struct drm_plane_state *primary_state; |
| struct drm_crtc *crtc = set->crtc; |
| int hdisplay, vdisplay; |
| int ret; |
| |
| crtc_state = drm_atomic_get_crtc_state(state, crtc); |
| if (IS_ERR(crtc_state)) |
| return PTR_ERR(crtc_state); |
| |
| primary_state = drm_atomic_get_plane_state(state, crtc->primary); |
| if (IS_ERR(primary_state)) |
| return PTR_ERR(primary_state); |
| |
| if (!set->mode) { |
| WARN_ON(set->fb); |
| WARN_ON(set->num_connectors); |
| |
| ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
| if (ret != 0) |
| return ret; |
| |
| crtc_state->active = false; |
| |
| ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
| if (ret != 0) |
| return ret; |
| |
| drm_atomic_set_fb_for_plane(primary_state, NULL); |
| |
| goto commit; |
| } |
| |
| WARN_ON(!set->fb); |
| WARN_ON(!set->num_connectors); |
| |
| ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
| if (ret != 0) |
| return ret; |
| |
| crtc_state->active = true; |
| |
| ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
| if (ret != 0) |
| return ret; |
| |
| drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
| |
| drm_atomic_set_fb_for_plane(primary_state, set->fb); |
| primary_state->crtc_x = 0; |
| primary_state->crtc_y = 0; |
| primary_state->crtc_w = hdisplay; |
| primary_state->crtc_h = vdisplay; |
| primary_state->src_x = set->x << 16; |
| primary_state->src_y = set->y << 16; |
| if (drm_rotation_90_or_270(primary_state->rotation)) { |
| primary_state->src_w = vdisplay << 16; |
| primary_state->src_h = hdisplay << 16; |
| } else { |
| primary_state->src_w = hdisplay << 16; |
| primary_state->src_h = vdisplay << 16; |
| } |
| |
| commit: |
| ret = update_output_state(state, set); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(__drm_atomic_helper_set_config); |
| |
| static void drm_atomic_private_obj_print_state(struct drm_printer *p, |
| const struct drm_private_state *state) |
| { |
| struct drm_private_obj *obj = state->obj; |
| |
| if (obj->funcs->atomic_print_state) |
| obj->funcs->atomic_print_state(p, state); |
| } |
| |
| /** |
| * drm_atomic_print_new_state - prints drm atomic state |
| * @state: atomic configuration to check |
| * @p: drm printer |
| * |
| * This functions prints the drm atomic state snapshot using the drm printer |
| * which is passed to it. This snapshot can be used for debugging purposes. |
| * |
| * Note that this function looks into the new state objects and hence its not |
| * safe to be used after the call to drm_atomic_helper_commit_hw_done(). |
| */ |
| void drm_atomic_print_new_state(const struct drm_atomic_state *state, |
| struct drm_printer *p) |
| { |
| struct drm_plane *plane; |
| struct drm_plane_state *plane_state; |
| struct drm_crtc *crtc; |
| struct drm_crtc_state *crtc_state; |
| struct drm_connector *connector; |
| struct drm_connector_state *connector_state; |
| struct drm_private_obj *obj; |
| struct drm_private_state *obj_state; |
| int i; |
| |
| if (!p) { |
| drm_err(state->dev, "invalid drm printer\n"); |
| return; |
| } |
| |
| drm_dbg_atomic(state->dev, "checking %p\n", state); |
| |
| for_each_new_plane_in_state(state, plane, plane_state, i) |
| drm_atomic_plane_print_state(p, plane_state); |
| |
| for_each_new_crtc_in_state(state, crtc, crtc_state, i) |
| drm_atomic_crtc_print_state(p, crtc_state); |
| |
| for_each_new_connector_in_state(state, connector, connector_state, i) |
| drm_atomic_connector_print_state(p, connector_state); |
| |
| for_each_new_private_obj_in_state(state, obj, obj_state, i) |
| drm_atomic_private_obj_print_state(p, obj_state); |
| } |
| EXPORT_SYMBOL(drm_atomic_print_new_state); |
| |
| static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p, |
| bool take_locks) |
| { |
| struct drm_mode_config *config = &dev->mode_config; |
| struct drm_plane *plane; |
| struct drm_crtc *crtc; |
| struct drm_connector *connector; |
| struct drm_connector_list_iter conn_iter; |
| |
| if (!drm_drv_uses_atomic_modeset(dev)) |
| return; |
| |
| list_for_each_entry(plane, &config->plane_list, head) { |
| if (take_locks) |
| drm_modeset_lock(&plane->mutex, NULL); |
| drm_atomic_plane_print_state(p, plane->state); |
| if (take_locks) |
| drm_modeset_unlock(&plane->mutex); |
| } |
| |
| list_for_each_entry(crtc, &config->crtc_list, head) { |
| if (take_locks) |
| drm_modeset_lock(&crtc->mutex, NULL); |
| drm_atomic_crtc_print_state(p, crtc->state); |
| if (take_locks) |
| drm_modeset_unlock(&crtc->mutex); |
| } |
| |
| drm_connector_list_iter_begin(dev, &conn_iter); |
| if (take_locks) |
| drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); |
| drm_for_each_connector_iter(connector, &conn_iter) |
| drm_atomic_connector_print_state(p, connector->state); |
| if (take_locks) |
| drm_modeset_unlock(&dev->mode_config.connection_mutex); |
| drm_connector_list_iter_end(&conn_iter); |
| } |
| |
| /** |
| * drm_state_dump - dump entire device atomic state |
| * @dev: the drm device |
| * @p: where to print the state to |
| * |
| * Just for debugging. Drivers might want an option to dump state |
| * to dmesg in case of error irq's. (Hint, you probably want to |
| * ratelimit this!) |
| * |
| * The caller must wrap this drm_modeset_lock_all_ctx() and |
| * drm_modeset_drop_locks(). If this is called from error irq handler, it should |
| * not be enabled by default - if you are debugging errors you might |
| * not care that this is racey, but calling this without all modeset locks held |
| * is inherently unsafe. |
| */ |
| void drm_state_dump(struct drm_device *dev, struct drm_printer *p) |
| { |
| __drm_state_dump(dev, p, false); |
| } |
| EXPORT_SYMBOL(drm_state_dump); |
| |
| #ifdef CONFIG_DEBUG_FS |
| static int drm_state_info(struct seq_file *m, void *data) |
| { |
| struct drm_debugfs_entry *entry = m->private; |
| struct drm_device *dev = entry->dev; |
| struct drm_printer p = drm_seq_file_printer(m); |
| |
| __drm_state_dump(dev, &p, true); |
| |
| return 0; |
| } |
| |
| /* any use in debugfs files to dump individual planes/crtc/etc? */ |
| static const struct drm_debugfs_info drm_atomic_debugfs_list[] = { |
| {"state", drm_state_info, 0}, |
| }; |
| |
| void drm_atomic_debugfs_init(struct drm_minor *minor) |
| { |
| drm_debugfs_add_files(minor->dev, drm_atomic_debugfs_list, |
| ARRAY_SIZE(drm_atomic_debugfs_list)); |
| } |
| #endif |