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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 * Daniel Vetter */ #ifndef DRM_ATOMIC_H_ #define DRM_ATOMIC_H_ #include #include /** * struct drm_crtc_commit - track modeset commits on a CRTC * * This structure is used to track pending modeset changes and atomic commit on * a per-CRTC basis. Since updating the list should never block this structure * is reference counted to allow waiters to safely wait on an event to complete, * without holding any locks. * * It has 3 different events in total to allow a fine-grained synchronization * between outstanding updates:: * * atomic commit thread hardware * * write new state into hardware ----> ... * signal hw_done * switch to new state on next * ... v/hblank * * wait for buffers to show up ... * * ... send completion irq * irq handler signals flip_done * cleanup old buffers * * signal cleanup_done * * wait for flip_done <---- * clean up atomic state * * The important bit to know is that cleanup_done is the terminal event, but the * ordering between flip_done and hw_done is entirely up to the specific driver * and modeset state change. * * For an implementation of how to use this look at * drm_atomic_helper_setup_commit() from the atomic helper library. */ struct drm_crtc_commit { /** * @crtc: * * DRM CRTC for this commit. */ struct drm_crtc *crtc; /** * @ref: * * Reference count for this structure. Needed to allow blocking on * completions without the risk of the completion disappearing * meanwhile. */ struct kref ref; /** * @flip_done: * * Will be signaled when the hardware has flipped to the new set of * buffers. Signals at the same time as when the drm event for this * commit is sent to userspace, or when an out-fence is singalled. Note * that for most hardware, in most cases this happens after @hw_done is * signalled. */ struct completion flip_done; /** * @hw_done: * * Will be signalled when all hw register changes for this commit have * been written out. Especially when disabling a pipe this can be much * later than than @flip_done, since that can signal already when the * screen goes black, whereas to fully shut down a pipe more register * I/O is required. * * Note that this does not need to include separately reference-counted * resources like backing storage buffer pinning, or runtime pm * management. */ struct completion hw_done; /** * @cleanup_done: * * Will be signalled after old buffers have been cleaned up by calling * drm_atomic_helper_cleanup_planes(). Since this can only happen after * a vblank wait completed it might be a bit later. This completion is * useful to throttle updates and avoid hardware updates getting ahead * of the buffer cleanup too much. */ struct completion cleanup_done; /** * @commit_entry: * * Entry on the per-CRTC &drm_crtc.commit_list. Protected by * $drm_crtc.commit_lock. */ struct list_head commit_entry; /** * @event: * * &drm_pending_vblank_event pointer to clean up private events. */ struct drm_pending_vblank_event *event; /** * @abort_completion: * * A flag that's set after drm_atomic_helper_setup_commit() takes a * second reference for the completion of $drm_crtc_state.event. It's * used by the free code to remove the second reference if commit fails. */ bool abort_completion; }; struct __drm_planes_state { struct drm_plane *ptr; struct drm_plane_state *state, *old_state, *new_state; }; struct __drm_crtcs_state { struct drm_crtc *ptr; struct drm_crtc_state *state, *old_state, *new_state; /** * @commit: * * A reference to the CRTC commit object that is kept for use by * drm_atomic_helper_wait_for_flip_done() after * drm_atomic_helper_commit_hw_done() is called. This ensures that a * concurrent commit won't free a commit object that is still in use. */ struct drm_crtc_commit *commit; s32 __user *out_fence_ptr; u64 last_vblank_count; }; struct __drm_connnectors_state { struct drm_connector *ptr; struct drm_connector_state *state, *old_state, *new_state; /** * @out_fence_ptr: * * User-provided pointer which the kernel uses to return a sync_file * file descriptor. Used by writeback connectors to signal completion of * the writeback. */ s32 __user *out_fence_ptr; }; struct drm_private_obj; struct drm_private_state; /** * struct drm_private_state_funcs - atomic state functions for private objects * * These hooks are used by atomic helpers to create, swap and destroy states of * private objects. The structure itself is used as a vtable to identify the * associated private object type. Each private object type that needs to be * added to the atomic states is expected to have an implementation of these * hooks and pass a pointer to its drm_private_state_funcs struct to * drm_atomic_get_private_obj_state(). */ struct drm_private_state_funcs { /** * @atomic_duplicate_state: * * Duplicate the current state of the private object and return it. It * is an error to call this before obj->state has been initialized. * * RETURNS: * * Duplicated atomic state or NULL when obj->state is not * initialized or allocation failed. */ struct drm_private_state *(*atomic_duplicate_state)(struct drm_private_obj *obj); /** * @atomic_destroy_state: * * Frees the private object state created with @atomic_duplicate_state. */ void (*atomic_destroy_state)(struct drm_private_obj *obj, struct drm_private_state *state); }; /** * struct drm_private_obj - base struct for driver private atomic object * * A driver private object is initialized by calling * drm_atomic_private_obj_init() and cleaned up by calling * drm_atomic_private_obj_fini(). * * Currently only tracks the state update functions and the opaque driver * private state itself, but in the future might also track which * &drm_modeset_lock is required to duplicate and update this object's state. * * All private objects must be initialized before the DRM device they are * attached to is registered to the DRM subsystem (call to drm_dev_register()) * and should stay around until this DRM device is unregistered (call to * drm_dev_unregister()). In other words, private objects lifetime is tied * to the DRM device lifetime. This implies that: * * 1/ all calls to drm_atomic_private_obj_init() must be done before calling * drm_dev_register() * 2/ all calls to drm_atomic_private_obj_fini() must be done after calling * drm_dev_unregister() */ struct drm_private_obj { /** * @head: List entry used to attach a private object to a &drm_device * (queued to &drm_mode_config.privobj_list). */ struct list_head head; /** * @lock: Modeset lock to protect the state object. */ struct drm_modeset_lock lock; /** * @state: Current atomic state for this driver private object. */ struct drm_private_state *state; /** * @funcs: * * Functions to manipulate the state of this driver private object, see * &drm_private_state_funcs. */ const struct drm_private_state_funcs *funcs; }; /** * drm_for_each_privobj() - private object iterator * * @privobj: pointer to the current private object. Updated after each * iteration * @dev: the DRM device we want get private objects from * * Allows one to iterate over all private objects attached to @dev */ #define drm_for_each_privobj(privobj, dev) \ list_for_each_entry(privobj, &(dev)->mode_config.privobj_list, head) /** * struct drm_private_state - base struct for driver private object state * @state: backpointer to global drm_atomic_state * * Currently only contains a backpointer to the overall atomic update, but in * the future also might hold synchronization information similar to e.g. * &drm_crtc.commit. */ struct drm_private_state { struct drm_atomic_state *state; }; struct __drm_private_objs_state { struct drm_private_obj *ptr; struct drm_private_state *state, *old_state, *new_state; }; /** * struct drm_atomic_state - the global state object for atomic updates * @ref: count of all references to this state (will not be freed until zero) * @dev: parent DRM device * @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics * @async_update: hint for asynchronous plane update * @planes: pointer to array of structures with per-plane data * @crtcs: pointer to array of CRTC pointers * @num_connector: size of the @connectors and @connector_states arrays * @connectors: pointer to array of structures with per-connector data * @num_private_objs: size of the @private_objs array * @private_objs: pointer to array of private object pointers * @acquire_ctx: acquire context for this atomic modeset state update * * States are added to an atomic update by calling drm_atomic_get_crtc_state(), * drm_atomic_get_plane_state(), drm_atomic_get_connector_state(), or for * private state structures, drm_atomic_get_private_obj_state(). */ struct drm_atomic_state { struct kref ref; struct drm_device *dev; /** * @allow_modeset: * * Allow full modeset. This is used by the ATOMIC IOCTL handler to * implement the DRM_MODE_ATOMIC_ALLOW_MODESET flag. Drivers should * never consult this flag, instead looking at the output of * drm_atomic_crtc_needs_modeset(). */ bool allow_modeset : 1; bool legacy_cursor_update : 1; bool async_update : 1; /** * @duplicated: * * Indicates whether or not this atomic state was duplicated using * drm_atomic_helper_duplicate_state(). Drivers and atomic helpers * should use this to fixup normal inconsistencies in duplicated * states. */ bool duplicated : 1; struct __drm_planes_state *planes; struct __drm_crtcs_state *crtcs; int num_connector; struct __drm_connnectors_state *connectors; int num_private_objs; struct __drm_private_objs_state *private_objs; struct drm_modeset_acquire_ctx *acquire_ctx; /** * @fake_commit: * * Used for signaling unbound planes/connectors. * When a connector or plane is not bound to any CRTC, it's still important * to preserve linearity to prevent the atomic states from being freed to early. * * This commit (if set) is not bound to any crtc, but will be completed when * drm_atomic_helper_commit_hw_done() is called. */ struct drm_crtc_commit *fake_commit; /** * @commit_work: * * Work item which can be used by the driver or helpers to execute the * commit without blocking. */ struct work_struct commit_work; }; void __drm_crtc_commit_free(struct kref *kref); /** * drm_crtc_commit_get - acquire a reference to the CRTC commit * @commit: CRTC commit * * Increases the reference of @commit. * * Returns: * The pointer to @commit, with reference increased. */ static inline struct drm_crtc_commit *drm_crtc_commit_get(struct drm_crtc_commit *commit) { kref_get(&commit->ref); return commit; } /** * drm_crtc_commit_put - release a reference to the CRTC commmit * @commit: CRTC commit * * This releases a reference to @commit which is freed after removing the * final reference. No locking required and callable from any context. */ static inline void drm_crtc_commit_put(struct drm_crtc_commit *commit) { kref_put(&commit->ref, __drm_crtc_commit_free); } struct drm_atomic_state * __must_check drm_atomic_state_alloc(struct drm_device *dev); void drm_atomic_state_clear(struct drm_atomic_state *state); /** * drm_atomic_state_get - acquire a reference to the atomic state * @state: The atomic state * * Returns a new reference to the @state */ static inline struct drm_atomic_state * drm_atomic_state_get(struct drm_atomic_state *state) { kref_get(&state->ref); return state; } void __drm_atomic_state_free(struct kref *ref); /** * drm_atomic_state_put - release a reference to the atomic state * @state: The atomic state * * This releases a reference to @state which is freed after removing the * final reference. No locking required and callable from any context. */ static inline void drm_atomic_state_put(struct drm_atomic_state *state) { kref_put(&state->ref, __drm_atomic_state_free); } int __must_check drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state); void drm_atomic_state_default_clear(struct drm_atomic_state *state); void drm_atomic_state_default_release(struct drm_atomic_state *state); struct drm_crtc_state * __must_check drm_atomic_get_crtc_state(struct drm_atomic_state *state, struct drm_crtc *crtc); struct drm_plane_state * __must_check drm_atomic_get_plane_state(struct drm_atomic_state *state, struct drm_plane *plane); struct drm_connector_state * __must_check drm_atomic_get_connector_state(struct drm_atomic_state *state, struct drm_connector *connector); void drm_atomic_private_obj_init(struct drm_device *dev, struct drm_private_obj *obj, struct drm_private_state *state, const struct drm_private_state_funcs *funcs); void drm_atomic_private_obj_fini(struct drm_private_obj *obj); struct drm_private_state * __must_check drm_atomic_get_private_obj_state(struct drm_atomic_state *state, struct drm_private_obj *obj); struct drm_private_state * drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state, struct drm_private_obj *obj); struct drm_private_state * drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state, struct drm_private_obj *obj); struct drm_connector * drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state, struct drm_encoder *encoder); struct drm_connector * drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state, struct drm_encoder *encoder); /** * drm_atomic_get_existing_crtc_state - get crtc state, if it exists * @state: global atomic state object * @crtc: crtc to grab * * This function returns the crtc state for the given crtc, or NULL * if the crtc is not part of the global atomic state. * * This function is deprecated, @drm_atomic_get_old_crtc_state or * @drm_atomic_get_new_crtc_state should be used instead. */ static inline struct drm_crtc_state * drm_atomic_get_existing_crtc_state(struct drm_atomic_state *state, struct drm_crtc *crtc) { return state->crtcs[drm_crtc_index(crtc)].state; } /** * drm_atomic_get_old_crtc_state - get old crtc state, if it exists * @state: global atomic state object * @crtc: crtc to grab * * This function returns the old crtc state for the given crtc, or * NULL if the crtc is not part of the global atomic state. */ static inline struct drm_crtc_state * drm_atomic_get_old_crtc_state(struct drm_atomic_state *state, struct drm_crtc *crtc) { return state->crtcs[drm_crtc_index(crtc)].old_state; } /** * drm_atomic_get_new_crtc_state - get new crtc state, if it exists * @state: global atomic state object * @crtc: crtc to grab * * This function returns the new crtc state for the given crtc, or * NULL if the crtc is not part of the global atomic state. */ static inline struct drm_crtc_state * drm_atomic_get_new_crtc_state(struct drm_atomic_state *state, struct drm_crtc *crtc) { return state->crtcs[drm_crtc_index(crtc)].new_state; } /** * drm_atomic_get_existing_plane_state - get plane state, if it exists * @state: global atomic state object * @plane: plane to grab * * This function returns the plane state for the given plane, or NULL * if the plane is not part of the global atomic state. * * This function is deprecated, @drm_atomic_get_old_plane_state or * @drm_atomic_get_new_plane_state should be used instead. */ static inline struct drm_plane_state * drm_atomic_get_existing_plane_state(struct drm_atomic_state *state, struct drm_plane *plane) { return state->planes[drm_plane_index(plane)].state; } /** * drm_atomic_get_old_plane_state - get plane state, if it exists * @state: global atomic state object * @plane: plane to grab * * This function returns the old plane state for the given plane, or * NULL if the plane is not part of the global atomic state. */ static inline struct drm_plane_state * drm_atomic_get_old_plane_state(struct drm_atomic_state *state, struct drm_plane *plane) { return state->planes[drm_plane_index(plane)].old_state; } /** * drm_atomic_get_new_plane_state - get plane state, if it exists * @state: global atomic state object * @plane: plane to grab * * This function returns the new plane state for the given plane, or * NULL if the plane is not part of the global atomic state. */ static inline struct drm_plane_state * drm_atomic_get_new_plane_state(struct drm_atomic_state *state, struct drm_plane *plane) { return state->planes[drm_plane_index(plane)].new_state; } /** * drm_atomic_get_existing_connector_state - get connector state, if it exists * @state: global atomic state object * @connector: connector to grab * * This function returns the connector state for the given connector, * or NULL if the connector is not part of the global atomic state. * * This function is deprecated, @drm_atomic_get_old_connector_state or * @drm_atomic_get_new_connector_state should be used instead. */ static inline struct drm_connector_state * drm_atomic_get_existing_connector_state(struct drm_atomic_state *state, struct drm_connector *connector) { int index = drm_connector_index(connector); if (index >= state->num_connector) return NULL; return state->connectors[index].state; } /** * drm_atomic_get_old_connector_state - get connector state, if it exists * @state: global atomic state object * @connector: connector to grab * * This function returns the old connector state for the given connector, * or NULL if the connector is not part of the global atomic state. */ static inline struct drm_connector_state * drm_atomic_get_old_connector_state(struct drm_atomic_state *state, struct drm_connector *connector) { int index = drm_connector_index(connector); if (index >= state->num_connector) return NULL; return state->connectors[index].old_state; } /** * drm_atomic_get_new_connector_state - get connector state, if it exists * @state: global atomic state object * @connector: connector to grab * * This function returns the new connector state for the given connector, * or NULL if the connector is not part of the global atomic state. */ static inline struct drm_connector_state * drm_atomic_get_new_connector_state(struct drm_atomic_state *state, struct drm_connector *connector) { int index = drm_connector_index(connector); if (index >= state->num_connector) return NULL; return state->connectors[index].new_state; } /** * __drm_atomic_get_current_plane_state - get current plane state * @state: global atomic state object * @plane: plane to grab * * This function returns the plane state for the given plane, either from * @state, or if the plane isn't part of the atomic state update, from @plane. * This is useful in atomic check callbacks, when drivers need to peek at, but * not change, state of other planes, since it avoids threading an error code * back up the call chain. * * WARNING: * * Note that this function is in general unsafe since it doesn't check for the * required locking for access state structures. Drivers must ensure that it is * safe to access the returned state structure through other means. One common * example is when planes are fixed to a single CRTC, and the driver knows that * the CRTC lock is held already. In that case holding the CRTC lock gives a * read-lock on all planes connected to that CRTC. But if planes can be * reassigned things get more tricky. In that case it's better to use * drm_atomic_get_plane_state and wire up full error handling. * * Returns: * * Read-only pointer to the current plane state. */ static inline const struct drm_plane_state * __drm_atomic_get_current_plane_state(struct drm_atomic_state *state, struct drm_plane *plane) { if (state->planes[drm_plane_index(plane)].state) return state->planes[drm_plane_index(plane)].state; return plane->state; } int __must_check drm_atomic_add_affected_connectors(struct drm_atomic_state *state, struct drm_crtc *crtc); int __must_check drm_atomic_add_affected_planes(struct drm_atomic_state *state, struct drm_crtc *crtc); int __must_check drm_atomic_check_only(struct drm_atomic_state *state); int __must_check drm_atomic_commit(struct drm_atomic_state *state); int __must_check drm_atomic_nonblocking_commit(struct drm_atomic_state *state); void drm_state_dump(struct drm_device *dev, struct drm_printer *p); /** * for_each_oldnew_connector_in_state - iterate over all connectors in an atomic update * @__state: &struct drm_atomic_state pointer * @connector: &struct drm_connector iteration cursor * @old_connector_state: &struct drm_connector_state iteration cursor for the * old state * @new_connector_state: &struct drm_connector_state iteration cursor for the * new state * @__i: int iteration cursor, for macro-internal use * * This iterates over all connectors in an atomic update, tracking both old and * new state. This is useful in places where the state delta needs to be * considered, for example in atomic check functions. */ #define for_each_oldnew_connector_in_state(__state, connector, old_connector_state, new_connector_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->num_connector; \ (__i)++) \ for_each_if ((__state)->connectors[__i].ptr && \ ((connector) = (__state)->connectors[__i].ptr, \ (old_connector_state) = (__state)->connectors[__i].old_state, \ (new_connector_state) = (__state)->connectors[__i].new_state, 1)) /** * for_each_old_connector_in_state - iterate over all connectors in an atomic update * @__state: &struct drm_atomic_state pointer * @connector: &struct drm_connector iteration cursor * @old_connector_state: &struct drm_connector_state iteration cursor for the * old state * @__i: int iteration cursor, for macro-internal use * * This iterates over all connectors in an atomic update, tracking only the old * state. This is useful in disable functions, where we need the old state the * hardware is still in. */ #define for_each_old_connector_in_state(__state, connector, old_connector_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->num_connector; \ (__i)++) \ for_each_if ((__state)->connectors[__i].ptr && \ ((connector) = (__state)->connectors[__i].ptr, \ (old_connector_state) = (__state)->connectors[__i].old_state, 1)) /** * for_each_new_connector_in_state - iterate over all connectors in an atomic update * @__state: &struct drm_atomic_state pointer * @connector: &struct drm_connector iteration cursor * @new_connector_state: &struct drm_connector_state iteration cursor for the * new state * @__i: int iteration cursor, for macro-internal use * * This iterates over all connectors in an atomic update, tracking only the new * state. This is useful in enable functions, where we need the new state the * hardware should be in when the atomic commit operation has completed. */ #define for_each_new_connector_in_state(__state, connector, new_connector_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->num_connector; \ (__i)++) \ for_each_if ((__state)->connectors[__i].ptr && \ ((connector) = (__state)->connectors[__i].ptr, \ (new_connector_state) = (__state)->connectors[__i].new_state, 1)) /** * for_each_oldnew_crtc_in_state - iterate over all CRTCs in an atomic update * @__state: &struct drm_atomic_state pointer * @crtc: &struct drm_crtc iteration cursor * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state * @__i: int iteration cursor, for macro-internal use * * This iterates over all CRTCs in an atomic update, tracking both old and * new state. This is useful in places where the state delta needs to be * considered, for example in atomic check functions. */ #define for_each_oldnew_crtc_in_state(__state, crtc, old_crtc_state, new_crtc_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->dev->mode_config.num_crtc; \ (__i)++) \ for_each_if ((__state)->crtcs[__i].ptr && \ ((crtc) = (__state)->crtcs[__i].ptr, \ (old_crtc_state) = (__state)->crtcs[__i].old_state, \ (new_crtc_state) = (__state)->crtcs[__i].new_state, 1)) /** * for_each_old_crtc_in_state - iterate over all CRTCs in an atomic update * @__state: &struct drm_atomic_state pointer * @crtc: &struct drm_crtc iteration cursor * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state * @__i: int iteration cursor, for macro-internal use * * This iterates over all CRTCs in an atomic update, tracking only the old * state. This is useful in disable functions, where we need the old state the * hardware is still in. */ #define for_each_old_crtc_in_state(__state, crtc, old_crtc_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->dev->mode_config.num_crtc; \ (__i)++) \ for_each_if ((__state)->crtcs[__i].ptr && \ ((crtc) = (__state)->crtcs[__i].ptr, \ (old_crtc_state) = (__state)->crtcs[__i].old_state, 1)) /** * for_each_new_crtc_in_state - iterate over all CRTCs in an atomic update * @__state: &struct drm_atomic_state pointer * @crtc: &struct drm_crtc iteration cursor * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state * @__i: int iteration cursor, for macro-internal use * * This iterates over all CRTCs in an atomic update, tracking only the new * state. This is useful in enable functions, where we need the new state the * hardware should be in when the atomic commit operation has completed. */ #define for_each_new_crtc_in_state(__state, crtc, new_crtc_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->dev->mode_config.num_crtc; \ (__i)++) \ for_each_if ((__state)->crtcs[__i].ptr && \ ((crtc) = (__state)->crtcs[__i].ptr, \ (new_crtc_state) = (__state)->crtcs[__i].new_state, 1)) /** * for_each_oldnew_plane_in_state - iterate over all planes in an atomic update * @__state: &struct drm_atomic_state pointer * @plane: &struct drm_plane iteration cursor * @old_plane_state: &struct drm_plane_state iteration cursor for the old state * @new_plane_state: &struct drm_plane_state iteration cursor for the new state * @__i: int iteration cursor, for macro-internal use * * This iterates over all planes in an atomic update, tracking both old and * new state. This is useful in places where the state delta needs to be * considered, for example in atomic check functions. */ #define for_each_oldnew_plane_in_state(__state, plane, old_plane_state, new_plane_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->dev->mode_config.num_total_plane; \ (__i)++) \ for_each_if ((__state)->planes[__i].ptr && \ ((plane) = (__state)->planes[__i].ptr, \ (old_plane_state) = (__state)->planes[__i].old_state,\ (new_plane_state) = (__state)->planes[__i].new_state, 1)) /** * for_each_oldnew_plane_in_state_reverse - iterate over all planes in an atomic * update in reverse order * @__state: &struct drm_atomic_state pointer * @plane: &struct drm_plane iteration cursor * @old_plane_state: &struct drm_plane_state iteration cursor for the old state * @new_plane_state: &struct drm_plane_state iteration cursor for the new state * @__i: int iteration cursor, for macro-internal use * * This iterates over all planes in an atomic update in reverse order, * tracking both old and new state. This is useful in places where the * state delta needs to be considered, for example in atomic check functions. */ #define for_each_oldnew_plane_in_state_reverse(__state, plane, old_plane_state, new_plane_state, __i) \ for ((__i) = ((__state)->dev->mode_config.num_total_plane - 1); \ (__i) >= 0; \ (__i)--) \ for_each_if ((__state)->planes[__i].ptr && \ ((plane) = (__state)->planes[__i].ptr, \ (old_plane_state) = (__state)->planes[__i].old_state,\ (new_plane_state) = (__state)->planes[__i].new_state, 1)) /** * for_each_old_plane_in_state - iterate over all planes in an atomic update * @__state: &struct drm_atomic_state pointer * @plane: &struct drm_plane iteration cursor * @old_plane_state: &struct drm_plane_state iteration cursor for the old state * @__i: int iteration cursor, for macro-internal use * * This iterates over all planes in an atomic update, tracking only the old * state. This is useful in disable functions, where we need the old state the * hardware is still in. */ #define for_each_old_plane_in_state(__state, plane, old_plane_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->dev->mode_config.num_total_plane; \ (__i)++) \ for_each_if ((__state)->planes[__i].ptr && \ ((plane) = (__state)->planes[__i].ptr, \ (old_plane_state) = (__state)->planes[__i].old_state, 1)) /** * for_each_new_plane_in_state - iterate over all planes in an atomic update * @__state: &struct drm_atomic_state pointer * @plane: &struct drm_plane iteration cursor * @new_plane_state: &struct drm_plane_state iteration cursor for the new state * @__i: int iteration cursor, for macro-internal use * * This iterates over all planes in an atomic update, tracking only the new * state. This is useful in enable functions, where we need the new state the * hardware should be in when the atomic commit operation has completed. */ #define for_each_new_plane_in_state(__state, plane, new_plane_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->dev->mode_config.num_total_plane; \ (__i)++) \ for_each_if ((__state)->planes[__i].ptr && \ ((plane) = (__state)->planes[__i].ptr, \ (new_plane_state) = (__state)->planes[__i].new_state, 1)) /** * for_each_oldnew_private_obj_in_state - iterate over all private objects in an atomic update * @__state: &struct drm_atomic_state pointer * @obj: &struct drm_private_obj iteration cursor * @old_obj_state: &struct drm_private_state iteration cursor for the old state * @new_obj_state: &struct drm_private_state iteration cursor for the new state * @__i: int iteration cursor, for macro-internal use * * This iterates over all private objects in an atomic update, tracking both * old and new state. This is useful in places where the state delta needs * to be considered, for example in atomic check functions. */ #define for_each_oldnew_private_obj_in_state(__state, obj, old_obj_state, new_obj_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->num_private_objs && \ ((obj) = (__state)->private_objs[__i].ptr, \ (old_obj_state) = (__state)->private_objs[__i].old_state, \ (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \ (__i)++) /** * for_each_old_private_obj_in_state - iterate over all private objects in an atomic update * @__state: &struct drm_atomic_state pointer * @obj: &struct drm_private_obj iteration cursor * @old_obj_state: &struct drm_private_state iteration cursor for the old state * @__i: int iteration cursor, for macro-internal use * * This iterates over all private objects in an atomic update, tracking only * the old state. This is useful in disable functions, where we need the old * state the hardware is still in. */ #define for_each_old_private_obj_in_state(__state, obj, old_obj_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->num_private_objs && \ ((obj) = (__state)->private_objs[__i].ptr, \ (old_obj_state) = (__state)->private_objs[__i].old_state, 1); \ (__i)++) /** * for_each_new_private_obj_in_state - iterate over all private objects in an atomic update * @__state: &struct drm_atomic_state pointer * @obj: &struct drm_private_obj iteration cursor * @new_obj_state: &struct drm_private_state iteration cursor for the new state * @__i: int iteration cursor, for macro-internal use * * This iterates over all private objects in an atomic update, tracking only * the new state. This is useful in enable functions, where we need the new state the * hardware should be in when the atomic commit operation has completed. */ #define for_each_new_private_obj_in_state(__state, obj, new_obj_state, __i) \ for ((__i) = 0; \ (__i) < (__state)->num_private_objs && \ ((obj) = (__state)->private_objs[__i].ptr, \ (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \ (__i)++) /** * drm_atomic_crtc_needs_modeset - compute combined modeset need * @state: &drm_crtc_state for the CRTC * * To give drivers flexibility &struct drm_crtc_state has 3 booleans to track * whether the state CRTC changed enough to need a full modeset cycle: * mode_changed, active_changed and connectors_changed. This helper simply * combines these three to compute the overall need for a modeset for @state. * * The atomic helper code sets these booleans, but drivers can and should * change them appropriately to accurately represent whether a modeset is * really needed. In general, drivers should avoid full modesets whenever * possible. * * For example if the CRTC mode has changed, and the hardware is able to enact * the requested mode change without going through a full modeset, the driver * should clear mode_changed in its &drm_mode_config_funcs.atomic_check * implementation. */ static inline bool drm_atomic_crtc_needs_modeset(const struct drm_crtc_state *state) { return state->mode_changed || state->active_changed || state->connectors_changed; } /** * drm_atomic_crtc_effectively_active - compute whether crtc is actually active * @state: &drm_crtc_state for the CRTC * * When in self refresh mode, the crtc_state->active value will be false, since * the crtc is off. However in some cases we're interested in whether the crtc * is active, or effectively active (ie: it's connected to an active display). * In these cases, use this function instead of just checking active. */ static inline bool drm_atomic_crtc_effectively_active(const struct drm_crtc_state *state) { return state->active || state->self_refresh_active; } #endif /* DRM_ATOMIC_H_ */