/* * 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 <[email protected]> * Daniel Vetter <[email protected]> */ #include <drm/drm_atomic.h> #include <drm/drm_atomic_state_helper.h> #include <drm/drm_blend.h> #include <drm/drm_bridge.h> #include <drm/drm_connector.h> #include <drm/drm_crtc.h> #include <drm/drm_device.h> #include <drm/drm_framebuffer.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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /** * drm_atomic_helper_connector_tv_margins_reset - Resets TV connector properties * @connector: DRM connector * * Resets the TV-related properties attached to a connector. */ void drm_atomic_helper_connector_tv_margins_reset(struct drm_connector *connector) { … } EXPORT_SYMBOL(…); /** * drm_atomic_helper_connector_tv_reset - Resets Analog TV connector properties * @connector: DRM connector * * Resets the analog TV properties attached to a connector */ void drm_atomic_helper_connector_tv_reset(struct drm_connector *connector) { … } EXPORT_SYMBOL(…); /** * drm_atomic_helper_connector_tv_check - Validate an analog TV connector state * @connector: DRM Connector * @state: the DRM State object * * Checks the state object to see if the requested state is valid for an * analog TV connector. * * Return: * %0 for success, a negative error code on error. */ int drm_atomic_helper_connector_tv_check(struct drm_connector *connector, struct drm_atomic_state *state) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /** * __drm_atomic_helper_private_obj_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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /** * __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) { … } EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…);
Codebase Browser
linux