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-rw-r--r--include/drm/drm_atomic.h95
1 files changed, 95 insertions, 0 deletions
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 788daf756f48..8645dcdef031 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -155,6 +155,53 @@ struct __drm_connnectors_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 it's drm_private_state_funcs struct to
+ * drm_atomic_get_private_obj_state().
+ */
+struct drm_private_state_funcs {
+ /**
+ * @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.
+ */
+ void *(*duplicate_state)(struct drm_atomic_state *state, void *obj);
+
+ /**
+ * @swap_state:
+ *
+ * This function swaps the existing state of a private object @obj with
+ * it's newly created state, the pointer to which is passed as
+ * @obj_state_ptr.
+ */
+ void (*swap_state)(void *obj, void **obj_state_ptr);
+
+ /**
+ * @destroy_state:
+ *
+ * Frees the private object state created with @duplicate_state.
+ */
+ void (*destroy_state)(void *obj_state);
+};
+
+struct __drm_private_objs_state {
+ void *obj;
+ void *obj_state;
+ const struct drm_private_state_funcs *funcs;
+};
+
+/**
* 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
@@ -164,6 +211,8 @@ struct __drm_connnectors_state {
* @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
*/
struct drm_atomic_state {
@@ -176,6 +225,8 @@ struct drm_atomic_state {
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;
@@ -268,6 +319,11 @@ int drm_atomic_connector_set_property(struct drm_connector *connector,
struct drm_connector_state *state, struct drm_property *property,
uint64_t val);
+void * __must_check
+drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
+ void *obj,
+ const struct drm_private_state_funcs *funcs);
+
/**
* drm_atomic_get_existing_crtc_state - get crtc state, if it exists
* @state: global atomic state object
@@ -753,6 +809,45 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
for_each_if (plane)
/**
+ * __for_each_private_obj - iterate over all private objects
+ * @__state: &struct drm_atomic_state pointer
+ * @obj: private object iteration cursor
+ * @obj_state: private object state iteration cursor
+ * @__i: int iteration cursor, for macro-internal use
+ * @__funcs: &struct drm_private_state_funcs iteration cursor
+ *
+ * This macro iterates over the array containing private object data in atomic
+ * state
+ */
+#define __for_each_private_obj(__state, obj, obj_state, __i, __funcs) \
+ for ((__i) = 0; \
+ (__i) < (__state)->num_private_objs && \
+ ((obj) = (__state)->private_objs[__i].obj, \
+ (__funcs) = (__state)->private_objs[__i].funcs, \
+ (obj_state) = (__state)->private_objs[__i].obj_state, \
+ 1); \
+ (__i)++) \
+
+/**
+ * for_each_private_obj - iterate over a specify type of private object
+ * @__state: &struct drm_atomic_state pointer
+ * @obj_funcs: &struct drm_private_state_funcs function table to filter
+ * private objects
+ * @obj: private object iteration cursor
+ * @obj_state: private object state iteration cursor
+ * @__i: int iteration cursor, for macro-internal use
+ * @__funcs: &struct drm_private_state_funcs iteration cursor
+ *
+ * This macro iterates over the private objects state array while filtering the
+ * objects based on the vfunc table that is passed as @obj_funcs. New macros
+ * can be created by passing in the vfunc table associated with a specific
+ * private object.
+ */
+#define for_each_private_obj(__state, obj_funcs, obj, obj_state, __i, __funcs) \
+ __for_each_private_obj(__state, obj, obj_state, __i, __funcs) \
+ for_each_if (__funcs == obj_funcs)
+
+/**
* drm_atomic_crtc_needs_modeset - compute combined modeset need
* @state: &drm_crtc_state for the CRTC
*