| /* |
| * Copyright (C) 2014 Red Hat |
| * Copyright (C) 2014 Intel Corp. |
| * |
| * 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 <drm/drmP.h> |
| #include <drm/drm_atomic.h> |
| #include <drm/drm_mode.h> |
| #include <drm/drm_plane_helper.h> |
| |
| #include "drm_crtc_internal.h" |
| |
| static void crtc_commit_free(struct kref *kref) |
| { |
| struct drm_crtc_commit *commit = |
| container_of(kref, struct drm_crtc_commit, ref); |
| |
| kfree(commit); |
| } |
| |
| void drm_crtc_commit_put(struct drm_crtc_commit *commit) |
| { |
| kref_put(&commit->ref, crtc_commit_free); |
| } |
| EXPORT_SYMBOL(drm_crtc_commit_put); |
| |
| /** |
| * 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 is useful for drivers that subclass the atomic state. |
| */ |
| void drm_atomic_state_default_release(struct drm_atomic_state *state) |
| { |
| kfree(state->connectors); |
| kfree(state->crtcs); |
| kfree(state->planes); |
| } |
| 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 is useful for drivers that subclass the atomic state. |
| */ |
| int |
| drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state) |
| { |
| /* 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_DEBUG_ATOMIC("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; |
| struct drm_atomic_state *state; |
| |
| if (!config->funcs->atomic_state_alloc) { |
| 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 is useful for drivers that subclass the atomic state. |
| */ |
| 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_DEBUG_ATOMIC("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; |
| drm_connector_unreference(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); |
| |
| if (state->crtcs[i].commit) { |
| kfree(state->crtcs[i].commit->event); |
| state->crtcs[i].commit->event = NULL; |
| drm_crtc_commit_put(state->crtcs[i].commit); |
| } |
| |
| state->crtcs[i].commit = NULL; |
| state->crtcs[i].ptr = NULL; |
| state->crtcs[i].state = 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; |
| } |
| } |
| 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 ->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 |
| * @state: 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 drm_atomic_state *state) |
| { |
| struct drm_device *dev; |
| struct drm_mode_config *config; |
| |
| if (!state) |
| return; |
| |
| dev = state->dev; |
| config = &dev->mode_config; |
| |
| drm_atomic_state_clear(state); |
| |
| DRM_DEBUG_ATOMIC("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. |
| * |
| * 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].ptr = crtc; |
| crtc_state->state = state; |
| |
| DRM_DEBUG_ATOMIC("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); |
| |
| /** |
| * drm_atomic_set_mode_for_crtc - set mode for CRTC |
| * @state: the CRTC whose incoming state to update |
| * @mode: kernel-internal mode to use for the CRTC, or NULL to disable |
| * |
| * Set a mode (originating from the kernel) on the desired CRTC state. Does |
| * not change any other state properties, including enable, active, or |
| * mode_changed. |
| * |
| * RETURNS: |
| * Zero on success, error code on failure. Cannot return -EDEADLK. |
| */ |
| int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state, |
| struct drm_display_mode *mode) |
| { |
| struct drm_mode_modeinfo umode; |
| |
| /* Early return for no change. */ |
| if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0) |
| return 0; |
| |
| drm_property_unreference_blob(state->mode_blob); |
| state->mode_blob = NULL; |
| |
| if (mode) { |
| drm_mode_convert_to_umode(&umode, mode); |
| state->mode_blob = |
| drm_property_create_blob(state->crtc->dev, |
| sizeof(umode), |
| &umode); |
| if (IS_ERR(state->mode_blob)) |
| return PTR_ERR(state->mode_blob); |
| |
| drm_mode_copy(&state->mode, mode); |
| state->enable = true; |
| DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n", |
| mode->name, state); |
| } else { |
| memset(&state->mode, 0, sizeof(state->mode)); |
| state->enable = false; |
| DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n", |
| state); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc); |
| |
| /** |
| * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC |
| * @state: the CRTC whose incoming state to update |
| * @blob: pointer to blob property to use for mode |
| * |
| * Set a mode (originating from a blob property) on the desired CRTC state. |
| * This function will take a reference on the blob property for the CRTC state, |
| * and release the reference held on the state's existing mode property, if any |
| * was set. |
| * |
| * RETURNS: |
| * Zero on success, error code on failure. Cannot return -EDEADLK. |
| */ |
| int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, |
| struct drm_property_blob *blob) |
| { |
| if (blob == state->mode_blob) |
| return 0; |
| |
| drm_property_unreference_blob(state->mode_blob); |
| state->mode_blob = NULL; |
| |
| memset(&state->mode, 0, sizeof(state->mode)); |
| |
| if (blob) { |
| if (blob->length != sizeof(struct drm_mode_modeinfo) || |
| drm_mode_convert_umode(&state->mode, |
| (const struct drm_mode_modeinfo *) |
| blob->data)) |
| return -EINVAL; |
| |
| state->mode_blob = drm_property_reference_blob(blob); |
| state->enable = true; |
| DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n", |
| state->mode.name, state); |
| } else { |
| state->enable = false; |
| DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n", |
| state); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); |
| |
| /** |
| * drm_atomic_replace_property_blob - replace a blob property |
| * @blob: a pointer to the member blob to be replaced |
| * @new_blob: the new blob to replace with |
| * @replaced: whether the blob has been replaced |
| * |
| * RETURNS: |
| * Zero on success, error code on failure |
| */ |
| static void |
| drm_atomic_replace_property_blob(struct drm_property_blob **blob, |
| struct drm_property_blob *new_blob, |
| bool *replaced) |
| { |
| struct drm_property_blob *old_blob = *blob; |
| |
| if (old_blob == new_blob) |
| return; |
| |
| if (old_blob) |
| drm_property_unreference_blob(old_blob); |
| if (new_blob) |
| drm_property_reference_blob(new_blob); |
| *blob = new_blob; |
| *replaced = true; |
| |
| return; |
| } |
| |
| static int |
| drm_atomic_replace_property_blob_from_id(struct drm_crtc *crtc, |
| struct drm_property_blob **blob, |
| uint64_t blob_id, |
| ssize_t expected_size, |
| bool *replaced) |
| { |
| struct drm_device *dev = crtc->dev; |
| struct drm_property_blob *new_blob = NULL; |
| |
| if (blob_id != 0) { |
| new_blob = drm_property_lookup_blob(dev, blob_id); |
| if (new_blob == NULL) |
| return -EINVAL; |
| if (expected_size > 0 && expected_size != new_blob->length) |
| return -EINVAL; |
| } |
| |
| drm_atomic_replace_property_blob(blob, new_blob, replaced); |
| |
| return 0; |
| } |
| |
| /** |
| * drm_atomic_crtc_set_property - set property on CRTC |
| * @crtc: the drm CRTC to set a property on |
| * @state: the state object to update with the new property value |
| * @property: the property to set |
| * @val: the new property value |
| * |
| * Use this instead of calling crtc->atomic_set_property directly. |
| * This function handles generic/core properties and calls out to |
| * driver's ->atomic_set_property() for driver properties. To ensure |
| * consistent behavior you must call this function rather than the |
| * driver hook directly. |
| * |
| * RETURNS: |
| * Zero on success, error code on failure |
| */ |
| int drm_atomic_crtc_set_property(struct drm_crtc *crtc, |
| struct drm_crtc_state *state, struct drm_property *property, |
| uint64_t val) |
| { |
| struct drm_device *dev = crtc->dev; |
| struct drm_mode_config *config = &dev->mode_config; |
| bool replaced = false; |
| int ret; |
| |
| if (property == config->prop_active) |
| state->active = val; |
| else if (property == config->prop_mode_id) { |
| struct drm_property_blob *mode = |
| drm_property_lookup_blob(dev, val); |
| ret = drm_atomic_set_mode_prop_for_crtc(state, mode); |
| drm_property_unreference_blob(mode); |
| return ret; |
| } else if (property == config->degamma_lut_property) { |
| ret = drm_atomic_replace_property_blob_from_id(crtc, |
| &state->degamma_lut, |
| val, |
| -1, |
| &replaced); |
| state->color_mgmt_changed = replaced; |
| return ret; |
| } else if (property == config->ctm_property) { |
| ret = drm_atomic_replace_property_blob_from_id(crtc, |
| &state->ctm, |
| val, |
| sizeof(struct drm_color_ctm), |
| &replaced); |
| state->color_mgmt_changed = replaced; |
| return ret; |
| } else if (property == config->gamma_lut_property) { |
| ret = drm_atomic_replace_property_blob_from_id(crtc, |
| &state->gamma_lut, |
| val, |
| -1, |
| &replaced); |
| state->color_mgmt_changed = replaced; |
| return ret; |
| } else if (crtc->funcs->atomic_set_property) |
| return crtc->funcs->atomic_set_property(crtc, state, property, val); |
| else |
| return -EINVAL; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_atomic_crtc_set_property); |
| |
| /** |
| * drm_atomic_crtc_get_property - get property value from CRTC state |
| * @crtc: the drm CRTC to set a property on |
| * @state: the state object to get the property value from |
| * @property: the property to set |
| * @val: return location for the property value |
| * |
| * This function handles generic/core properties and calls out to |
| * driver's ->atomic_get_property() for driver properties. To ensure |
| * consistent behavior you must call this function rather than the |
| * driver hook directly. |
| * |
| * RETURNS: |
| * Zero on success, error code on failure |
| */ |
| static int |
| drm_atomic_crtc_get_property(struct drm_crtc *crtc, |
| const struct drm_crtc_state *state, |
| struct drm_property *property, uint64_t *val) |
| { |
| struct drm_device *dev = crtc->dev; |
| struct drm_mode_config *config = &dev->mode_config; |
| |
| if (property == config->prop_active) |
| *val = state->active; |
| else if (property == config->prop_mode_id) |
| *val = (state->mode_blob) ? state->mode_blob->base.id : 0; |
| else if (property == config->degamma_lut_property) |
| *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; |
| else if (property == config->ctm_property) |
| *val = (state->ctm) ? state->ctm->base.id : 0; |
| else if (property == config->gamma_lut_property) |
| *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; |
| else if (crtc->funcs->atomic_get_property) |
| return crtc->funcs->atomic_get_property(crtc, state, property, val); |
| else |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| /** |
| * drm_atomic_crtc_check - check crtc state |
| * @crtc: crtc to check |
| * @state: crtc state to check |
| * |
| * Provides core sanity checks for crtc state. |
| * |
| * RETURNS: |
| * Zero on success, error code on failure |
| */ |
| static int drm_atomic_crtc_check(struct drm_crtc *crtc, |
| struct drm_crtc_state *state) |
| { |
| /* 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 (state->active && !state->enable) { |
| DRM_DEBUG_ATOMIC("[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(state->enable && !state->mode_blob)) { |
| DRM_DEBUG_ATOMIC("[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(!state->enable && state->mode_blob)) { |
| DRM_DEBUG_ATOMIC("[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 (state->event && !state->active && !crtc->state->active) { |
| DRM_DEBUG_ATOMIC("[CRTC:%d] requesting event but off\n", |
| crtc->base.id); |
| return -EINVAL; |
| } |
| |
| 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); |
| |
| 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; |
| plane_state->state = state; |
| |
| DRM_DEBUG_ATOMIC("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); |
| |
| /** |
| * drm_atomic_plane_set_property - set property on plane |
| * @plane: the drm plane to set a property on |
| * @state: the state object to update with the new property value |
| * @property: the property to set |
| * @val: the new property value |
| * |
| * Use this instead of calling plane->atomic_set_property directly. |
| * This function handles generic/core properties and calls out to |
| * driver's ->atomic_set_property() for driver properties. To ensure |
| * consistent behavior you must call this function rather than the |
| * driver hook directly. |
| * |
| * RETURNS: |
| * Zero on success, error code on failure |
| */ |
| int drm_atomic_plane_set_property(struct drm_plane *plane, |
| struct drm_plane_state *state, struct drm_property *property, |
| uint64_t val) |
| { |
| struct drm_device *dev = plane->dev; |
| struct drm_mode_config *config = &dev->mode_config; |
| |
| if (property == config->prop_fb_id) { |
| struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, val); |
| drm_atomic_set_fb_for_plane(state, fb); |
| if (fb) |
| drm_framebuffer_unreference(fb); |
| } else if (property == config->prop_crtc_id) { |
| struct drm_crtc *crtc = drm_crtc_find(dev, val); |
| return drm_atomic_set_crtc_for_plane(state, crtc); |
| } else if (property == config->prop_crtc_x) { |
| state->crtc_x = U642I64(val); |
| } else if (property == config->prop_crtc_y) { |
| state->crtc_y = U642I64(val); |
| } else if (property == config->prop_crtc_w) { |
| state->crtc_w = val; |
| } else if (property == config->prop_crtc_h) { |
| state->crtc_h = val; |
| } else if (property == config->prop_src_x) { |
| state->src_x = val; |
| } else if (property == config->prop_src_y) { |
| state->src_y = val; |
| } else if (property == config->prop_src_w) { |
| state->src_w = val; |
| } else if (property == config->prop_src_h) { |
| state->src_h = val; |
| } else if (property == config->rotation_property) { |
| state->rotation = val; |
| } else if (plane->funcs->atomic_set_property) { |
| return plane->funcs->atomic_set_property(plane, state, |
| property, val); |
| } else { |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_atomic_plane_set_property); |
| |
| /** |
| * drm_atomic_plane_get_property - get property value from plane state |
| * @plane: the drm plane to set a property on |
| * @state: the state object to get the property value from |
| * @property: the property to set |
| * @val: return location for the property value |
| * |
| * This function handles generic/core properties and calls out to |
| * driver's ->atomic_get_property() for driver properties. To ensure |
| * consistent behavior you must call this function rather than the |
| * driver hook directly. |
| * |
| * RETURNS: |
| * Zero on success, error code on failure |
| */ |
| static int |
| drm_atomic_plane_get_property(struct drm_plane *plane, |
| const struct drm_plane_state *state, |
| struct drm_property *property, uint64_t *val) |
| { |
| struct drm_device *dev = plane->dev; |
| struct drm_mode_config *config = &dev->mode_config; |
| |
| if (property == config->prop_fb_id) { |
| *val = (state->fb) ? state->fb->base.id : 0; |
| } else if (property == config->prop_crtc_id) { |
| *val = (state->crtc) ? state->crtc->base.id : 0; |
| } else if (property == config->prop_crtc_x) { |
| *val = I642U64(state->crtc_x); |
| } else if (property == config->prop_crtc_y) { |
| *val = I642U64(state->crtc_y); |
| } else if (property == config->prop_crtc_w) { |
| *val = state->crtc_w; |
| } else if (property == config->prop_crtc_h) { |
| *val = state->crtc_h; |
| } else if (property == config->prop_src_x) { |
| *val = state->src_x; |
| } else if (property == config->prop_src_y) { |
| *val = state->src_y; |
| } else if (property == config->prop_src_w) { |
| *val = state->src_w; |
| } else if (property == config->prop_src_h) { |
| *val = state->src_h; |
| } else if (property == config->rotation_property) { |
| *val = state->rotation; |
| } else if (plane->funcs->atomic_get_property) { |
| return plane->funcs->atomic_get_property(plane, state, property, val); |
| } else { |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static bool |
| plane_switching_crtc(struct drm_atomic_state *state, |
| struct drm_plane *plane, |
| struct drm_plane_state *plane_state) |
| { |
| if (!plane->state->crtc || !plane_state->crtc) |
| return false; |
| |
| if (plane->state->crtc == 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 |
| * @plane: plane to check |
| * @state: 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(struct drm_plane *plane, |
| struct drm_plane_state *state) |
| { |
| unsigned int fb_width, fb_height; |
| int ret; |
| |
| /* either *both* CRTC and FB must be set, or neither */ |
| if (WARN_ON(state->crtc && !state->fb)) { |
| DRM_DEBUG_ATOMIC("CRTC set but no FB\n"); |
| return -EINVAL; |
| } else if (WARN_ON(state->fb && !state->crtc)) { |
| DRM_DEBUG_ATOMIC("FB set but no CRTC\n"); |
| return -EINVAL; |
| } |
| |
| /* if disabled, we don't care about the rest of the state: */ |
| if (!state->crtc) |
| return 0; |
| |
| /* Check whether this plane is usable on this CRTC */ |
| if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) { |
| DRM_DEBUG_ATOMIC("Invalid crtc for plane\n"); |
| return -EINVAL; |
| } |
| |
| /* Check whether this plane supports the fb pixel format. */ |
| ret = drm_plane_check_pixel_format(plane, state->fb->pixel_format); |
| if (ret) { |
| DRM_DEBUG_ATOMIC("Invalid pixel format %s\n", |
| drm_get_format_name(state->fb->pixel_format)); |
| return ret; |
| } |
| |
| /* Give drivers some help against integer overflows */ |
| if (state->crtc_w > INT_MAX || |
| state->crtc_x > INT_MAX - (int32_t) state->crtc_w || |
| state->crtc_h > INT_MAX || |
| state->crtc_y > INT_MAX - (int32_t) state->crtc_h) { |
| DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n", |
| state->crtc_w, state->crtc_h, |
| state->crtc_x, state->crtc_y); |
| return -ERANGE; |
| } |
| |
| fb_width = state->fb->width << 16; |
| fb_height = state->fb->height << 16; |
| |
| /* Make sure source coordinates are inside the fb. */ |
| if (state->src_w > fb_width || |
| state->src_x > fb_width - state->src_w || |
| state->src_h > fb_height || |
| state->src_y > fb_height - state->src_h) { |
| DRM_DEBUG_ATOMIC("Invalid source coordinates " |
| "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", |
| state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10, |
| state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10, |
| state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10, |
| state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10); |
| return -ENOSPC; |
| } |
| |
| if (plane_switching_crtc(state->state, plane, state)) { |
| DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n", |
| plane->base.id, plane->name); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * 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(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_reference(connector); |
| state->connectors[index].state = connector_state; |
| state->connectors[index].ptr = connector; |
| connector_state->state = state; |
| |
| DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d] %p state to %p\n", |
| connector->base.id, 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); |
| |
| /** |
| * drm_atomic_connector_set_property - set property on connector. |
| * @connector: the drm connector to set a property on |
| * @state: the state object to update with the new property value |
| * @property: the property to set |
| * @val: the new property value |
| * |
| * Use this instead of calling connector->atomic_set_property directly. |
| * This function handles generic/core properties and calls out to |
| * driver's ->atomic_set_property() for driver properties. To ensure |
| * consistent behavior you must call this function rather than the |
| * driver hook directly. |
| * |
| * RETURNS: |
| * Zero on success, error code on failure |
| */ |
| int drm_atomic_connector_set_property(struct drm_connector *connector, |
| struct drm_connector_state *state, struct drm_property *property, |
| uint64_t val) |
| { |
| struct drm_device *dev = connector->dev; |
| struct drm_mode_config *config = &dev->mode_config; |
| |
| if (property == config->prop_crtc_id) { |
| struct drm_crtc *crtc = drm_crtc_find(dev, val); |
| return drm_atomic_set_crtc_for_connector(state, crtc); |
| } else if (property == config->dpms_property) { |
| /* setting DPMS property requires special handling, which |
| * is done in legacy setprop path for us. Disallow (for |
| * now?) atomic writes to DPMS property: |
| */ |
| return -EINVAL; |
| } else if (connector->funcs->atomic_set_property) { |
| return connector->funcs->atomic_set_property(connector, |
| state, property, val); |
| } else { |
| return -EINVAL; |
| } |
| } |
| EXPORT_SYMBOL(drm_atomic_connector_set_property); |
| |
| /** |
| * drm_atomic_connector_get_property - get property value from connector state |
| * @connector: the drm connector to set a property on |
| * @state: the state object to get the property value from |
| * @property: the property to set |
| * @val: return location for the property value |
| * |
| * This function handles generic/core properties and calls out to |
| * driver's ->atomic_get_property() for driver properties. To ensure |
| * consistent behavior you must call this function rather than the |
| * driver hook directly. |
| * |
| * RETURNS: |
| * Zero on success, error code on failure |
| */ |
| static int |
| drm_atomic_connector_get_property(struct drm_connector *connector, |
| const struct drm_connector_state *state, |
| struct drm_property *property, uint64_t *val) |
| { |
| struct drm_device *dev = connector->dev; |
| struct drm_mode_config *config = &dev->mode_config; |
| |
| if (property == config->prop_crtc_id) { |
| *val = (state->crtc) ? state->crtc->base.id : 0; |
| } else if (property == config->dpms_property) { |
| *val = connector->dpms; |
| } else if (connector->funcs->atomic_get_property) { |
| return connector->funcs->atomic_get_property(connector, |
| state, property, val); |
| } else { |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| int drm_atomic_get_property(struct drm_mode_object *obj, |
| struct drm_property *property, uint64_t *val) |
| { |
| struct drm_device *dev = property->dev; |
| int ret; |
| |
| switch (obj->type) { |
| case DRM_MODE_OBJECT_CONNECTOR: { |
| struct drm_connector *connector = obj_to_connector(obj); |
| WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
| ret = drm_atomic_connector_get_property(connector, |
| connector->state, property, val); |
| break; |
| } |
| case DRM_MODE_OBJECT_CRTC: { |
| struct drm_crtc *crtc = obj_to_crtc(obj); |
| WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); |
| ret = drm_atomic_crtc_get_property(crtc, |
| crtc->state, property, val); |
| break; |
| } |
| case DRM_MODE_OBJECT_PLANE: { |
| struct drm_plane *plane = obj_to_plane(obj); |
| WARN_ON(!drm_modeset_is_locked(&plane->mutex)); |
| ret = drm_atomic_plane_get_property(plane, |
| plane->state, property, val); |
| break; |
| } |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * drm_atomic_set_crtc_for_plane - set crtc for plane |
| * @plane_state: the plane whose incoming state to update |
| * @crtc: crtc to use for the plane |
| * |
| * Changing the assigned crtc for a plane requires us to grab the lock and state |
| * for the new crtc, as needed. This function takes care of all these details |
| * besides updating the pointer in the state object itself. |
| * |
| * 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_set_crtc_for_plane(struct drm_plane_state *plane_state, |
| struct drm_crtc *crtc) |
| { |
| struct drm_plane *plane = plane_state->plane; |
| struct drm_crtc_state *crtc_state; |
| |
| if (plane_state->crtc) { |
| crtc_state = drm_atomic_get_crtc_state(plane_state->state, |
| plane_state->crtc); |
| if (WARN_ON(IS_ERR(crtc_state))) |
| return PTR_ERR(crtc_state); |
| |
| crtc_state->plane_mask &= ~(1 << drm_plane_index(plane)); |
| } |
| |
| plane_state->crtc = crtc; |
| |
| if (crtc) { |
| crtc_state = drm_atomic_get_crtc_state(plane_state->state, |
| crtc); |
| if (IS_ERR(crtc_state)) |
| return PTR_ERR(crtc_state); |
| crtc_state->plane_mask |= (1 << drm_plane_index(plane)); |
| } |
| |
| if (crtc) |
| DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d:%s]\n", |
| plane_state, crtc->base.id, crtc->name); |
| else |
| DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n", |
| plane_state); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane); |
| |
| /** |
| * drm_atomic_set_fb_for_plane - set framebuffer for plane |
| * @plane_state: atomic state object for the plane |
| * @fb: fb to use for the plane |
| * |
| * Changing the assigned framebuffer for a plane requires us to grab a reference |
| * to the new fb and drop the reference to the old fb, if there is one. This |
| * function takes care of all these details besides updating the pointer in the |
| * state object itself. |
| */ |
| void |
| drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, |
| struct drm_framebuffer *fb) |
| { |
| if (plane_state->fb) |
| drm_framebuffer_unreference(plane_state->fb); |
| if (fb) |
| drm_framebuffer_reference(fb); |
| plane_state->fb = fb; |
| |
| if (fb) |
| DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n", |
| fb->base.id, plane_state); |
| else |
| DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n", |
| plane_state); |
| } |
| EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); |
| |
| /** |
| * drm_atomic_set_crtc_for_connector - set crtc for connector |
| * @conn_state: atomic state object for the connector |
| * @crtc: crtc to use for the connector |
| * |
| * Changing the assigned crtc for a connector requires us to grab the lock and |
| * state for the new crtc, as needed. This function takes care of all these |
| * details besides updating the pointer in the state object itself. |
| * |
| * 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_set_crtc_for_connector(struct drm_connector_state *conn_state, |
| struct drm_crtc *crtc) |
| { |
| struct drm_crtc_state *crtc_state; |
| |
| if (conn_state->crtc == crtc) |
| return 0; |
| |
| if (conn_state->crtc) { |
| crtc_state = drm_atomic_get_existing_crtc_state(conn_state->state, |
| conn_state->crtc); |
| |
| crtc_state->connector_mask &= |
| ~(1 << drm_connector_index(conn_state->connector)); |
| |
| drm_connector_unreference(conn_state->connector); |
| conn_state->crtc = NULL; |
| } |
| |
| if (crtc) { |
| crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); |
| if (IS_ERR(crtc_state)) |
| return PTR_ERR(crtc_state); |
| |
| crtc_state->connector_mask |= |
| 1 << drm_connector_index(conn_state->connector); |
| |
| drm_connector_reference(conn_state->connector); |
| conn_state->crtc = crtc; |
| |
| DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n", |
| conn_state, crtc->base.id, crtc->name); |
| } else { |
| DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n", |
| conn_state); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); |
| |
| /** |
| * 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 seralization 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; |
| int ret; |
| |
| ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); |
| if (ret) |
| return ret; |
| |
| DRM_DEBUG_ATOMIC("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 |
| * current configuration. |
| */ |
| drm_for_each_connector(connector, state->dev) { |
| if (connector->state->crtc != crtc) |
| continue; |
| |
| conn_state = drm_atomic_get_connector_state(state, connector); |
| if (IS_ERR(conn_state)) |
| return PTR_ERR(conn_state); |
| } |
| |
| 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 parallism 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) |
| { |
| struct drm_plane *plane; |
| |
| WARN_ON(!drm_atomic_get_existing_crtc_state(state, crtc)); |
| |
| drm_for_each_plane_mask(plane, state->dev, 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_legacy_backoff - locking backoff for legacy ioctls |
| * @state: atomic state |
| * |
| * This function should be used by legacy entry points which don't understand |
| * -EDEADLK semantics. For simplicity this one will grab all modeset locks after |
| * the slowpath completed. |
| */ |
| void drm_atomic_legacy_backoff(struct drm_atomic_state *state) |
| { |
| struct drm_device *dev = state->dev; |
| unsigned crtc_mask = 0; |
| struct drm_crtc *crtc; |
| int ret; |
| bool global = false; |
| |
| drm_for_each_crtc(crtc, dev) { |
| if (crtc->acquire_ctx != state->acquire_ctx) |
| continue; |
| |
| crtc_mask |= drm_crtc_mask(crtc); |
| crtc->acquire_ctx = NULL; |
| } |
| |
| if (WARN_ON(dev->mode_config.acquire_ctx == state->acquire_ctx)) { |
| global = true; |
| |
| dev->mode_config.acquire_ctx = NULL; |
| } |
| |
| retry: |
| drm_modeset_backoff(state->acquire_ctx); |
| |
| ret = drm_modeset_lock_all_ctx(dev, state->acquire_ctx); |
| if (ret) |
| goto retry; |
| |
| drm_for_each_crtc(crtc, dev) |
| if (drm_crtc_mask(crtc) & crtc_mask) |
| crtc->acquire_ctx = state->acquire_ctx; |
| |
| if (global) |
| dev->mode_config.acquire_ctx = state->acquire_ctx; |
| } |
| EXPORT_SYMBOL(drm_atomic_legacy_backoff); |
| |
| /** |
| * 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 *plane_state; |
| struct drm_crtc *crtc; |
| struct drm_crtc_state *crtc_state; |
| int i, ret = 0; |
| |
| DRM_DEBUG_ATOMIC("checking %p\n", state); |
| |
| for_each_plane_in_state(state, plane, plane_state, i) { |
| ret = drm_atomic_plane_check(plane, plane_state); |
| if (ret) { |
| DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n", |
| plane->base.id, plane->name); |
| return ret; |
| } |
| } |
| |
| for_each_crtc_in_state(state, crtc, crtc_state, i) { |
| ret = drm_atomic_crtc_check(crtc, crtc_state); |
| if (ret) { |
| DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n", |
| crtc->base.id, crtc->name); |
| return ret; |
| } |
| } |
| |
| if (config->funcs->atomic_check) |
| ret = config->funcs->atomic_check(state->dev, state); |
| |
| if (!state->allow_modeset) { |
| for_each_crtc_in_state(state, crtc, crtc_state, i) { |
| if (drm_atomic_crtc_needs_modeset(crtc_state)) { |
| DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n", |
| crtc->base.id, crtc->name); |
| return -EINVAL; |
| } |
| } |
| } |
| |
| return ret; |
| } |
| 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. |
| * |
| * Also note that on successful execution ownership of @state is transferred |
| * from the caller of this function to the function itself. The caller must not |
| * free or in any other way access @state. If the function fails then the caller |
| * must clean up @state itself. |
| * |
| * 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; |
| int ret; |
| |
| ret = drm_atomic_check_only(state); |
| if (ret) |
| return ret; |
| |
| DRM_DEBUG_ATOMIC("commiting %p\n", state); |
| |
| return config->funcs->atomic_commit(state->dev, state, false); |
| } |
| EXPORT_SYMBOL(drm_atomic_commit); |
| |
| /** |
| * drm_atomic_nonblocking_commit - atomic&nonblocking configuration 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. |
| * |
| * Also note that on successful execution ownership of @state is transferred |
| * from the caller of this function to the function itself. The caller must not |
| * free or in any other way access @state. If the function fails then the caller |
| * must clean up @state itself. |
| * |
| * 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_DEBUG_ATOMIC("commiting %p nonblocking\n", state); |
| |
| return config->funcs->atomic_commit(state->dev, state, true); |
| } |
| EXPORT_SYMBOL(drm_atomic_nonblocking_commit); |
| |
| /* |
| * The big monstor ioctl |
| */ |
| |
| static struct drm_pending_vblank_event *create_vblank_event( |
| struct drm_device *dev, struct drm_file *file_priv, |
| struct fence *fence, uint64_t user_data) |
| { |
| struct drm_pending_vblank_event *e = NULL; |
| int ret; |
| |
| e = kzalloc(sizeof *e, GFP_KERNEL); |
| if (!e) |
| return NULL; |
| |
| e->event.base.type = DRM_EVENT_FLIP_COMPLETE; |
| e->event.base.length = sizeof(e->event); |
| e->event.user_data = user_data; |
| |
| if (file_priv) { |
| ret = drm_event_reserve_init(dev, file_priv, &e->base, |
| &e->event.base); |
| if (ret) { |
| kfree(e); |
| return NULL; |
| } |
| } |
| |
| e->base.fence = fence; |
| |
| return e; |
| } |
| |
| static int atomic_set_prop(struct drm_atomic_state *state, |
| struct drm_mode_object *obj, struct drm_property *prop, |
| uint64_t prop_value) |
| { |
| struct drm_mode_object *ref; |
| int ret; |
| |
| if (!drm_property_change_valid_get(prop, prop_value, &ref)) |
| return -EINVAL; |
| |
| switch (obj->type) { |
| case DRM_MODE_OBJECT_CONNECTOR: { |
| struct drm_connector *connector = obj_to_connector(obj); |
| struct drm_connector_state *connector_state; |
| |
| connector_state = drm_atomic_get_connector_state(state, connector); |
| if (IS_ERR(connector_state)) { |
| ret = PTR_ERR(connector_state); |
| break; |
| } |
| |
| ret = drm_atomic_connector_set_property(connector, |
| connector_state, prop, prop_value); |
| break; |
| } |
| case DRM_MODE_OBJECT_CRTC: { |
| struct drm_crtc *crtc = obj_to_crtc(obj); |
| struct drm_crtc_state *crtc_state; |
| |
| crtc_state = drm_atomic_get_crtc_state(state, crtc); |
| if (IS_ERR(crtc_state)) { |
| ret = PTR_ERR(crtc_state); |
| break; |
| } |
| |
| ret = drm_atomic_crtc_set_property(crtc, |
| crtc_state, prop, prop_value); |
| break; |
| } |
| case DRM_MODE_OBJECT_PLANE: { |
| struct drm_plane *plane = obj_to_plane(obj); |
| struct drm_plane_state *plane_state; |
| |
| plane_state = drm_atomic_get_plane_state(state, plane); |
| if (IS_ERR(plane_state)) { |
| ret = PTR_ERR(plane_state); |
| break; |
| } |
| |
| ret = drm_atomic_plane_set_property(plane, |
| plane_state, prop, prop_value); |
| break; |
| } |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| |
| drm_property_change_valid_put(prop, ref); |
| return ret; |
| } |
| |
| /** |
| * drm_atomic_clean_old_fb -- Unset old_fb pointers and set plane->fb pointers. |
| * |
| * @dev: drm device to check. |
| * @plane_mask: plane mask for planes that were updated. |
| * @ret: return value, can be -EDEADLK for a retry. |
| * |
| * Before doing an update plane->old_fb is set to plane->fb, |
| * but before dropping the locks old_fb needs to be set to NULL |
| * and plane->fb updated. This is a common operation for each |
| * atomic update, so this call is split off as a helper. |
| */ |
| void drm_atomic_clean_old_fb(struct drm_device *dev, |
| unsigned plane_mask, |
| int ret) |
| { |
| struct drm_plane *plane; |
| |
| /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping |
| * locks (ie. while it is still safe to deref plane->state). We |
| * need to do this here because the driver entry points cannot |
| * distinguish between legacy and atomic ioctls. |
| */ |
| drm_for_each_plane_mask(plane, dev, plane_mask) { |
| if (ret == 0) { |
| struct drm_framebuffer *new_fb = plane->state->fb; |
| if (new_fb) |
| drm_framebuffer_reference(new_fb); |
| plane->fb = new_fb; |
| plane->crtc = plane->state->crtc; |
| |
| if (plane->old_fb) |
| drm_framebuffer_unreference(plane->old_fb); |
| } |
| plane->old_fb = NULL; |
| } |
| } |
| EXPORT_SYMBOL(drm_atomic_clean_old_fb); |
| |
| int drm_atomic_remove_fb(struct drm_framebuffer *fb) |
| { |
| struct drm_modeset_acquire_ctx ctx; |
| struct drm_device *dev = fb->dev; |
| struct drm_atomic_state *state; |
| struct drm_plane *plane; |
| int ret = 0; |
| unsigned plane_mask; |
| |
| state = drm_atomic_state_alloc(dev); |
| if (!state) |
| return -ENOMEM; |
| |
| drm_modeset_acquire_init(&ctx, 0); |
| state->acquire_ctx = &ctx; |
| |
| retry: |
| plane_mask = 0; |
| ret = drm_modeset_lock_all_ctx(dev, &ctx); |
| if (ret) |
| goto unlock; |
| |
| drm_for_each_plane(plane, dev) { |
| struct drm_plane_state *plane_state; |
| |
| if (plane->state->fb != fb) |
| continue; |
| |
| plane_state = drm_atomic_get_plane_state(state, plane); |
| if (IS_ERR(plane_state)) { |
| ret = PTR_ERR(plane_state); |
| goto unlock; |
| } |
| |
| drm_atomic_set_fb_for_plane(plane_state, NULL); |
| ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
| if (ret) |
| goto unlock; |
| |
| plane_mask |= BIT(drm_plane_index(plane)); |
| |
| plane->old_fb = plane->fb; |
| plane->fb = NULL; |
| } |
| |
| if (plane_mask) |
| ret = drm_atomic_commit(state); |
| |
| unlock: |
| if (plane_mask) |
| drm_atomic_clean_old_fb(dev, plane_mask, ret); |
| |
| if (ret == -EDEADLK) { |
| drm_modeset_backoff(&ctx); |
| goto retry; |
| } |
| |
| if (ret || !plane_mask) |
| drm_atomic_state_free(state); |
| |
| drm_modeset_drop_locks(&ctx); |
| drm_modeset_acquire_fini(&ctx); |
| |
| return ret; |
| } |
| |
| int drm_mode_atomic_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_atomic *arg = data; |
| uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); |
| uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); |
| uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); |
| uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); |
| unsigned int copied_objs, copied_props; |
| struct drm_atomic_state *state; |
| struct drm_modeset_acquire_ctx ctx; |
| struct drm_plane *plane; |
| struct drm_crtc *crtc; |
| struct drm_crtc_state *crtc_state; |
| unsigned plane_mask; |
| int ret = 0; |
| unsigned int i, j; |
| |
| /* disallow for drivers not supporting atomic: */ |
| if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) |
| return -EINVAL; |
| |
| /* disallow for userspace that has not enabled atomic cap (even |
| * though this may be a bit overkill, since legacy userspace |
| * wouldn't know how to call this ioctl) |
| */ |
| if (!file_priv->atomic) |
| return -EINVAL; |
| |
| if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) |
| return -EINVAL; |
| |
| if (arg->reserved) |
| return -EINVAL; |
| |
| if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) && |
| !dev->mode_config.async_page_flip) |
| return -EINVAL; |
| |
| /* can't test and expect an event at the same time. */ |
| if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && |
| (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) |
| return -EINVAL; |
| |
| drm_modeset_acquire_init(&ctx, 0); |
| |
| state = drm_atomic_state_alloc(dev); |
| if (!state) |
| return -ENOMEM; |
| |
| state->acquire_ctx = &ctx; |
| state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); |
| |
| retry: |
| plane_mask = 0; |
| copied_objs = 0; |
| copied_props = 0; |
| |
| for (i = 0; i < arg->count_objs; i++) { |
| uint32_t obj_id, count_props; |
| struct drm_mode_object *obj; |
| |
| if (get_user(obj_id, objs_ptr + copied_objs)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| obj = drm_mode_object_find(dev, obj_id, DRM_MODE_OBJECT_ANY); |
| if (!obj) { |
| ret = -ENOENT; |
| goto out; |
| } |
| |
| if (!obj->properties) { |
| drm_mode_object_unreference(obj); |
| ret = -ENOENT; |
| goto out; |
| } |
| |
| if (get_user(count_props, count_props_ptr + copied_objs)) { |
| drm_mode_object_unreference(obj); |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| copied_objs++; |
| |
| for (j = 0; j < count_props; j++) { |
| uint32_t prop_id; |
| uint64_t prop_value; |
| struct drm_property *prop; |
| |
| if (get_user(prop_id, props_ptr + copied_props)) { |
| drm_mode_object_unreference(obj); |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| prop = drm_property_find(dev, prop_id); |
| if (!prop) { |
| drm_mode_object_unreference(obj); |
| ret = -ENOENT; |
| goto out; |
| } |
| |
| if (copy_from_user(&prop_value, |
| prop_values_ptr + copied_props, |
| sizeof(prop_value))) { |
| drm_mode_object_unreference(obj); |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| ret = atomic_set_prop(state, obj, prop, prop_value); |
| if (ret) { |
| drm_mode_object_unreference(obj); |
| goto out; |
| } |
| |
| copied_props++; |
| } |
| |
| if (obj->type == DRM_MODE_OBJECT_PLANE && count_props && |
| !(arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)) { |
| plane = obj_to_plane(obj); |
| plane_mask |= (1 << drm_plane_index(plane)); |
| plane->old_fb = plane->fb; |
| } |
| drm_mode_object_unreference(obj); |
| } |
| |
| if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { |
| for_each_crtc_in_state(state, crtc, crtc_state, i) { |
| struct drm_pending_vblank_event *e; |
| |
| e = create_vblank_event(dev, file_priv, NULL, |
| arg->user_data); |
| if (!e) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| crtc_state->event = e; |
| } |
| } |
| |
| if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { |
| /* |
| * Unlike commit, check_only does not clean up state. |
| * Below we call drm_atomic_state_free for it. |
| */ |
| ret = drm_atomic_check_only(state); |
| } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) { |
| ret = drm_atomic_nonblocking_commit(state); |
| } else { |
| ret = drm_atomic_commit(state); |
| } |
| |
| out: |
| drm_atomic_clean_old_fb(dev, plane_mask, ret); |
| |
| if (ret && arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { |
| /* |
| * TEST_ONLY and PAGE_FLIP_EVENT are mutually exclusive, |
| * if they weren't, this code should be called on success |
| * for TEST_ONLY too. |
| */ |
| |
| for_each_crtc_in_state(state, crtc, crtc_state, i) { |
| if (!crtc_state->event) |
| continue; |
| |
| drm_event_cancel_free(dev, &crtc_state->event->base); |
| } |
| } |
| |
| if (ret == -EDEADLK) { |
| drm_atomic_state_clear(state); |
| drm_modeset_backoff(&ctx); |
| goto retry; |
| } |
| |
| if (ret || arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) |
| drm_atomic_state_free(state); |
| |
| drm_modeset_drop_locks(&ctx); |
| drm_modeset_acquire_fini(&ctx); |
| |
| return ret; |
| } |