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- /*
- * Copyright (C) 2018 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/drm_atomic.h>
- #include <drm/drm_atomic_state_helper.h>
- #include <drm/drm_bridge.h>
- #include <drm/drm_connector.h>
- #include <drm/drm_crtc.h>
- #include <drm/drm_device.h>
- #include <drm/drm_plane.h>
- #include <drm/drm_print.h>
- #include <drm/drm_vblank.h>
- #include <drm/drm_writeback.h>
- #include <linux/slab.h>
- #include <linux/dma-fence.h>
- /**
- * DOC: atomic state reset and initialization
- *
- * Both the drm core and the atomic helpers assume that there is always the full
- * and correct atomic software state for all connectors, CRTCs and planes
- * available. Which is a bit a problem on driver load and also after system
- * suspend. One way to solve this is to have a hardware state read-out
- * infrastructure which reconstructs the full software state (e.g. the i915
- * driver).
- *
- * The simpler solution is to just reset the software state to everything off,
- * which is easiest to do by calling drm_mode_config_reset(). To facilitate this
- * the atomic helpers provide default reset implementations for all hooks.
- *
- * On the upside the precise state tracking of atomic simplifies system suspend
- * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe
- * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume().
- * For other drivers the building blocks are split out, see the documentation
- * for these functions.
- */
- /**
- * __drm_atomic_helper_crtc_state_reset - reset the CRTC state
- * @crtc_state: atomic CRTC state, must not be NULL
- * @crtc: CRTC object, must not be NULL
- *
- * Initializes the newly allocated @crtc_state with default
- * values. This is useful for drivers that subclass the CRTC state.
- */
- void
- __drm_atomic_helper_crtc_state_reset(struct drm_crtc_state *crtc_state,
- struct drm_crtc *crtc)
- {
- crtc_state->crtc = crtc;
- }
- EXPORT_SYMBOL(__drm_atomic_helper_crtc_state_reset);
- /**
- * __drm_atomic_helper_crtc_reset - reset state on CRTC
- * @crtc: drm CRTC
- * @crtc_state: CRTC state to assign
- *
- * Initializes the newly allocated @crtc_state and assigns it to
- * the &drm_crtc->state pointer of @crtc, usually required when
- * initializing the drivers or when called from the &drm_crtc_funcs.reset
- * hook.
- *
- * This is useful for drivers that subclass the CRTC state.
- */
- void
- __drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
- struct drm_crtc_state *crtc_state)
- {
- if (crtc_state)
- __drm_atomic_helper_crtc_state_reset(crtc_state, crtc);
- if (drm_dev_has_vblank(crtc->dev))
- drm_crtc_vblank_reset(crtc);
- crtc->state = crtc_state;
- }
- EXPORT_SYMBOL(__drm_atomic_helper_crtc_reset);
- /**
- * drm_atomic_helper_crtc_reset - default &drm_crtc_funcs.reset hook for CRTCs
- * @crtc: drm CRTC
- *
- * Resets the atomic state for @crtc by freeing the state pointer (which might
- * be NULL, e.g. at driver load time) and allocating a new empty state object.
- */
- void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc)
- {
- struct drm_crtc_state *crtc_state =
- kzalloc(sizeof(*crtc->state), GFP_KERNEL);
- if (crtc->state)
- crtc->funcs->atomic_destroy_state(crtc, crtc->state);
- __drm_atomic_helper_crtc_reset(crtc, crtc_state);
- }
- EXPORT_SYMBOL(drm_atomic_helper_crtc_reset);
- /**
- * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state
- * @crtc: CRTC object
- * @state: atomic CRTC state
- *
- * Copies atomic state from a CRTC's current state and resets inferred values.
- * This is useful for drivers that subclass the CRTC state.
- */
- void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
- struct drm_crtc_state *state)
- {
- memcpy(state, crtc->state, sizeof(*state));
- if (state->mode_blob)
- drm_property_blob_get(state->mode_blob);
- if (state->degamma_lut)
- drm_property_blob_get(state->degamma_lut);
- if (state->ctm)
- drm_property_blob_get(state->ctm);
- if (state->gamma_lut)
- drm_property_blob_get(state->gamma_lut);
- state->mode_changed = false;
- state->active_changed = false;
- state->planes_changed = false;
- state->connectors_changed = false;
- state->color_mgmt_changed = false;
- state->zpos_changed = false;
- state->commit = NULL;
- state->event = NULL;
- state->async_flip = false;
- /* Self refresh should be canceled when a new update is available */
- state->active = drm_atomic_crtc_effectively_active(state);
- state->self_refresh_active = false;
- }
- EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state);
- /**
- * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook
- * @crtc: drm CRTC
- *
- * Default CRTC state duplicate hook for drivers which don't have their own
- * subclassed CRTC state structure.
- */
- struct drm_crtc_state *
- drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc)
- {
- struct drm_crtc_state *state;
- if (WARN_ON(!crtc->state))
- return NULL;
- state = kmalloc(sizeof(*state), GFP_KERNEL);
- if (state)
- __drm_atomic_helper_crtc_duplicate_state(crtc, state);
- return state;
- }
- EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state);
- /**
- * __drm_atomic_helper_crtc_destroy_state - release CRTC state
- * @state: CRTC state object to release
- *
- * Releases all resources stored in the CRTC state without actually freeing
- * the memory of the CRTC state. This is useful for drivers that subclass the
- * CRTC state.
- */
- void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state)
- {
- if (state->commit) {
- /*
- * In the event that a non-blocking commit returns
- * -ERESTARTSYS before the commit_tail work is queued, we will
- * have an extra reference to the commit object. Release it, if
- * the event has not been consumed by the worker.
- *
- * state->event may be freed, so we can't directly look at
- * state->event->base.completion.
- */
- if (state->event && state->commit->abort_completion)
- drm_crtc_commit_put(state->commit);
- kfree(state->commit->event);
- state->commit->event = NULL;
- drm_crtc_commit_put(state->commit);
- }
- drm_property_blob_put(state->mode_blob);
- drm_property_blob_put(state->degamma_lut);
- drm_property_blob_put(state->ctm);
- drm_property_blob_put(state->gamma_lut);
- }
- EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state);
- /**
- * drm_atomic_helper_crtc_destroy_state - default state destroy hook
- * @crtc: drm CRTC
- * @state: CRTC state object to release
- *
- * Default CRTC state destroy hook for drivers which don't have their own
- * subclassed CRTC state structure.
- */
- void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
- struct drm_crtc_state *state)
- {
- __drm_atomic_helper_crtc_destroy_state(state);
- kfree(state);
- }
- EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state);
- /**
- * __drm_atomic_helper_plane_state_reset - resets plane state to default values
- * @plane_state: atomic plane state, must not be NULL
- * @plane: plane object, must not be NULL
- *
- * Initializes the newly allocated @plane_state with default
- * values. This is useful for drivers that subclass the CRTC state.
- */
- void __drm_atomic_helper_plane_state_reset(struct drm_plane_state *plane_state,
- struct drm_plane *plane)
- {
- plane_state->plane = plane;
- plane_state->rotation = DRM_MODE_ROTATE_0;
- plane_state->alpha = DRM_BLEND_ALPHA_OPAQUE;
- plane_state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
- }
- EXPORT_SYMBOL(__drm_atomic_helper_plane_state_reset);
- /**
- * __drm_atomic_helper_plane_reset - reset state on plane
- * @plane: drm plane
- * @plane_state: plane state to assign
- *
- * Initializes the newly allocated @plane_state and assigns it to
- * the &drm_crtc->state pointer of @plane, usually required when
- * initializing the drivers or when called from the &drm_plane_funcs.reset
- * hook.
- *
- * This is useful for drivers that subclass the plane state.
- */
- void __drm_atomic_helper_plane_reset(struct drm_plane *plane,
- struct drm_plane_state *plane_state)
- {
- if (plane_state)
- __drm_atomic_helper_plane_state_reset(plane_state, plane);
- plane->state = plane_state;
- }
- EXPORT_SYMBOL(__drm_atomic_helper_plane_reset);
- /**
- * drm_atomic_helper_plane_reset - default &drm_plane_funcs.reset hook for planes
- * @plane: drm plane
- *
- * Resets the atomic state for @plane by freeing the state pointer (which might
- * be NULL, e.g. at driver load time) and allocating a new empty state object.
- */
- void drm_atomic_helper_plane_reset(struct drm_plane *plane)
- {
- if (plane->state)
- __drm_atomic_helper_plane_destroy_state(plane->state);
- kfree(plane->state);
- plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL);
- if (plane->state)
- __drm_atomic_helper_plane_reset(plane, plane->state);
- }
- EXPORT_SYMBOL(drm_atomic_helper_plane_reset);
- /**
- * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state
- * @plane: plane object
- * @state: atomic plane state
- *
- * Copies atomic state from a plane's current state. This is useful for
- * drivers that subclass the plane state.
- */
- void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
- struct drm_plane_state *state)
- {
- memcpy(state, plane->state, sizeof(*state));
- if (state->fb)
- drm_framebuffer_get(state->fb);
- state->fence = NULL;
- state->commit = NULL;
- state->fb_damage_clips = NULL;
- }
- EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state);
- /**
- * drm_atomic_helper_plane_duplicate_state - default state duplicate hook
- * @plane: drm plane
- *
- * Default plane state duplicate hook for drivers which don't have their own
- * subclassed plane state structure.
- */
- struct drm_plane_state *
- drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane)
- {
- struct drm_plane_state *state;
- if (WARN_ON(!plane->state))
- return NULL;
- state = kmalloc(sizeof(*state), GFP_KERNEL);
- if (state)
- __drm_atomic_helper_plane_duplicate_state(plane, state);
- return state;
- }
- EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state);
- /**
- * __drm_atomic_helper_plane_destroy_state - release plane state
- * @state: plane state object to release
- *
- * Releases all resources stored in the plane state without actually freeing
- * the memory of the plane state. This is useful for drivers that subclass the
- * plane state.
- */
- void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state)
- {
- if (state->fb)
- drm_framebuffer_put(state->fb);
- if (state->fence)
- dma_fence_put(state->fence);
- if (state->commit)
- drm_crtc_commit_put(state->commit);
- drm_property_blob_put(state->fb_damage_clips);
- }
- EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state);
- /**
- * drm_atomic_helper_plane_destroy_state - default state destroy hook
- * @plane: drm plane
- * @state: plane state object to release
- *
- * Default plane state destroy hook for drivers which don't have their own
- * subclassed plane state structure.
- */
- void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
- struct drm_plane_state *state)
- {
- __drm_atomic_helper_plane_destroy_state(state);
- kfree(state);
- }
- EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state);
- /**
- * __drm_atomic_helper_connector_state_reset - reset the connector state
- * @conn_state: atomic connector state, must not be NULL
- * @connector: connectotr object, must not be NULL
- *
- * Initializes the newly allocated @conn_state with default
- * values. This is useful for drivers that subclass the connector state.
- */
- void
- __drm_atomic_helper_connector_state_reset(struct drm_connector_state *conn_state,
- struct drm_connector *connector)
- {
- conn_state->connector = connector;
- }
- EXPORT_SYMBOL(__drm_atomic_helper_connector_state_reset);
- /**
- * __drm_atomic_helper_connector_reset - reset state on connector
- * @connector: drm connector
- * @conn_state: connector state to assign
- *
- * Initializes the newly allocated @conn_state and assigns it to
- * the &drm_connector->state pointer of @connector, usually required when
- * initializing the drivers or when called from the &drm_connector_funcs.reset
- * hook.
- *
- * This is useful for drivers that subclass the connector state.
- */
- void
- __drm_atomic_helper_connector_reset(struct drm_connector *connector,
- struct drm_connector_state *conn_state)
- {
- if (conn_state)
- __drm_atomic_helper_connector_state_reset(conn_state, connector);
- connector->state = conn_state;
- }
- EXPORT_SYMBOL(__drm_atomic_helper_connector_reset);
- /**
- * drm_atomic_helper_connector_reset - default &drm_connector_funcs.reset hook for connectors
- * @connector: drm connector
- *
- * Resets the atomic state for @connector by freeing the state pointer (which
- * might be NULL, e.g. at driver load time) and allocating a new empty state
- * object.
- */
- void drm_atomic_helper_connector_reset(struct drm_connector *connector)
- {
- struct drm_connector_state *conn_state =
- kzalloc(sizeof(*conn_state), GFP_KERNEL);
- if (connector->state)
- __drm_atomic_helper_connector_destroy_state(connector->state);
- kfree(connector->state);
- __drm_atomic_helper_connector_reset(connector, conn_state);
- }
- EXPORT_SYMBOL(drm_atomic_helper_connector_reset);
- /**
- * drm_atomic_helper_connector_tv_reset - Resets TV connector properties
- * @connector: DRM connector
- *
- * Resets the TV-related properties attached to a connector.
- */
- void drm_atomic_helper_connector_tv_reset(struct drm_connector *connector)
- {
- struct drm_cmdline_mode *cmdline = &connector->cmdline_mode;
- struct drm_connector_state *state = connector->state;
- state->tv.margins.left = cmdline->tv_margins.left;
- state->tv.margins.right = cmdline->tv_margins.right;
- state->tv.margins.top = cmdline->tv_margins.top;
- state->tv.margins.bottom = cmdline->tv_margins.bottom;
- }
- EXPORT_SYMBOL(drm_atomic_helper_connector_tv_reset);
- /**
- * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
- * @connector: connector object
- * @state: atomic connector state
- *
- * Copies atomic state from a connector's current state. This is useful for
- * drivers that subclass the connector state.
- */
- void
- __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
- struct drm_connector_state *state)
- {
- memcpy(state, connector->state, sizeof(*state));
- if (state->crtc)
- drm_connector_get(connector);
- state->commit = NULL;
- if (state->hdr_output_metadata)
- drm_property_blob_get(state->hdr_output_metadata);
- /* Don't copy over a writeback job, they are used only once */
- state->writeback_job = NULL;
- }
- EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state);
- /**
- * drm_atomic_helper_connector_duplicate_state - default state duplicate hook
- * @connector: drm connector
- *
- * Default connector state duplicate hook for drivers which don't have their own
- * subclassed connector state structure.
- */
- struct drm_connector_state *
- drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector)
- {
- struct drm_connector_state *state;
- if (WARN_ON(!connector->state))
- return NULL;
- state = kmalloc(sizeof(*state), GFP_KERNEL);
- if (state)
- __drm_atomic_helper_connector_duplicate_state(connector, state);
- return state;
- }
- EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state);
- /**
- * __drm_atomic_helper_connector_destroy_state - release connector state
- * @state: connector state object to release
- *
- * Releases all resources stored in the connector state without actually
- * freeing the memory of the connector state. This is useful for drivers that
- * subclass the connector state.
- */
- void
- __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state)
- {
- if (state->crtc)
- drm_connector_put(state->connector);
- if (state->commit)
- drm_crtc_commit_put(state->commit);
- if (state->writeback_job)
- drm_writeback_cleanup_job(state->writeback_job);
- drm_property_blob_put(state->hdr_output_metadata);
- }
- EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state);
- /**
- * drm_atomic_helper_connector_destroy_state - default state destroy hook
- * @connector: drm connector
- * @state: connector state object to release
- *
- * Default connector state destroy hook for drivers which don't have their own
- * subclassed connector state structure.
- */
- void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
- struct drm_connector_state *state)
- {
- __drm_atomic_helper_connector_destroy_state(state);
- kfree(state);
- }
- EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state);
- /**
- * __drm_atomic_helper_private_duplicate_state - copy atomic private state
- * @obj: CRTC object
- * @state: new private object state
- *
- * Copies atomic state from a private objects's current state and resets inferred values.
- * This is useful for drivers that subclass the private state.
- */
- void __drm_atomic_helper_private_obj_duplicate_state(struct drm_private_obj *obj,
- struct drm_private_state *state)
- {
- memcpy(state, obj->state, sizeof(*state));
- }
- EXPORT_SYMBOL(__drm_atomic_helper_private_obj_duplicate_state);
- /**
- * __drm_atomic_helper_bridge_duplicate_state() - Copy atomic bridge state
- * @bridge: bridge object
- * @state: atomic bridge state
- *
- * Copies atomic state from a bridge's current state and resets inferred values.
- * This is useful for drivers that subclass the bridge state.
- */
- void __drm_atomic_helper_bridge_duplicate_state(struct drm_bridge *bridge,
- struct drm_bridge_state *state)
- {
- __drm_atomic_helper_private_obj_duplicate_state(&bridge->base,
- &state->base);
- state->bridge = bridge;
- }
- EXPORT_SYMBOL(__drm_atomic_helper_bridge_duplicate_state);
- /**
- * drm_atomic_helper_bridge_duplicate_state() - Duplicate a bridge state object
- * @bridge: bridge object
- *
- * Allocates a new bridge state and initializes it with the current bridge
- * state values. This helper is meant to be used as a bridge
- * &drm_bridge_funcs.atomic_duplicate_state hook for bridges that don't
- * subclass the bridge state.
- */
- struct drm_bridge_state *
- drm_atomic_helper_bridge_duplicate_state(struct drm_bridge *bridge)
- {
- struct drm_bridge_state *new;
- if (WARN_ON(!bridge->base.state))
- return NULL;
- new = kzalloc(sizeof(*new), GFP_KERNEL);
- if (new)
- __drm_atomic_helper_bridge_duplicate_state(bridge, new);
- return new;
- }
- EXPORT_SYMBOL(drm_atomic_helper_bridge_duplicate_state);
- /**
- * drm_atomic_helper_bridge_destroy_state() - Destroy a bridge state object
- * @bridge: the bridge this state refers to
- * @state: bridge state to destroy
- *
- * Destroys a bridge state previously created by
- * &drm_atomic_helper_bridge_reset() or
- * &drm_atomic_helper_bridge_duplicate_state(). This helper is meant to be
- * used as a bridge &drm_bridge_funcs.atomic_destroy_state hook for bridges
- * that don't subclass the bridge state.
- */
- void drm_atomic_helper_bridge_destroy_state(struct drm_bridge *bridge,
- struct drm_bridge_state *state)
- {
- kfree(state);
- }
- EXPORT_SYMBOL(drm_atomic_helper_bridge_destroy_state);
- /**
- * __drm_atomic_helper_bridge_reset() - Initialize a bridge state to its
- * default
- * @bridge: the bridge this state refers to
- * @state: bridge state to initialize
- *
- * Initializes the bridge state to default values. This is meant to be called
- * by the bridge &drm_bridge_funcs.atomic_reset hook for bridges that subclass
- * the bridge state.
- */
- void __drm_atomic_helper_bridge_reset(struct drm_bridge *bridge,
- struct drm_bridge_state *state)
- {
- memset(state, 0, sizeof(*state));
- state->bridge = bridge;
- }
- EXPORT_SYMBOL(__drm_atomic_helper_bridge_reset);
- /**
- * drm_atomic_helper_bridge_reset() - Allocate and initialize a bridge state
- * to its default
- * @bridge: the bridge this state refers to
- *
- * Allocates the bridge state and initializes it to default values. This helper
- * is meant to be used as a bridge &drm_bridge_funcs.atomic_reset hook for
- * bridges that don't subclass the bridge state.
- */
- struct drm_bridge_state *
- drm_atomic_helper_bridge_reset(struct drm_bridge *bridge)
- {
- struct drm_bridge_state *bridge_state;
- bridge_state = kzalloc(sizeof(*bridge_state), GFP_KERNEL);
- if (!bridge_state)
- return ERR_PTR(-ENOMEM);
- __drm_atomic_helper_bridge_reset(bridge, bridge_state);
- return bridge_state;
- }
- EXPORT_SYMBOL(drm_atomic_helper_bridge_reset);
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