This pair of functions return the old/new private object state for the
given private_obj, or NULL if the private_obj is not part of the global
atomic state.
Reviewed-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@xxxxxxx>
Signed-off-by: James (Qian) Wang <james.qian.wang@xxxxxxx>
---
drivers/gpu/drm/drm_atomic.c | 45 +++++++++++++++++++++++++++++++++++-
include/drm/drm_atomic.h | 6 +++++
2 files changed, 50 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 9ac26437051b..6ff29f3862fc 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -764,6 +764,50 @@ drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
}
EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
+/**
+ * drm_atomic_get_old_private_obj_state
+ * @state: global atomic state object
+ * @obj: private_obj to grab
+ *
+ * This function returns the old private object state for the given private_obj,
+ * or NULL if the private_obj is not part of the global atomic state.
+ */
+struct drm_private_state *
+drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
+ struct drm_private_obj *obj)
+{
+ int i;
+
+ for (i = 0; i < state->num_private_objs; i++)
+ if (obj == state->private_objs[i].ptr)
+ return state->private_objs[i].old_state;
+
+ return NULL;
+}
+EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
+
+/**
+ * drm_atomic_get_new_private_obj_state
+ * @state: global atomic state object
+ * @obj: private_obj to grab
+ *
+ * This function returns the new private object state for the given private_obj,
+ * or NULL if the private_obj is not part of the global atomic state.
+ */
+struct drm_private_state *
+drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
+ struct drm_private_obj *obj)
+{
+ int i;
+
+ for (i = 0; i < state->num_private_objs; i++)
+ if (obj == state->private_objs[i].ptr)
+ return state->private_objs[i].new_state;
+
+ return NULL;
+}
+EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
+
/**
* drm_atomic_get_connector_state - get connector state
* @state: global atomic state object
@@ -1203,4 +1247,3 @@ int drm_atomic_debugfs_init(struct drm_minor *minor)
minor->debugfs_root, minor);
}
#endif
-
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index f9b35834c45d..beb7b7fb6067 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -408,6 +408,12 @@ 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);
/**
* drm_atomic_get_existing_crtc_state - get crtc state, if it exists
--
2.17.1
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