[PATCH 24/29] drm/bridge: Provide a helper to get the global state from a bridge state

[Maxime Ripard <mripard@kernel.org>]

We have access to the global drm_atomic_state from a drm_bridge_state,
but since it's fairly indirect it's not as obvious as it can be for
other KMS entities.

Provide a helper to make it easier to figure out.

Signed-off-by: Maxime Ripard <mripard@kernel.org>
---
 include/drm/drm_atomic.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 31ca88deb10d262fb3a3f8e14d2afe24f8410cb1..bd7959ae312c99c0a0034d36378ae44f04f6a374 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -1183,10 +1183,26 @@ static inline struct drm_bridge_state *
 drm_priv_to_bridge_state(struct drm_private_state *priv)
 {
 	return container_of(priv, struct drm_bridge_state, base);
 }
 
+/**
+ * @drm_bridge_state_get_atomic_state() - Get the atomic state from a bridge state
+ * @bridge_state: bridge state object
+ *
+ * RETURNS:
+ * The global atomic state @bridge_state is a part of, or NULL if there is none.
+ */
+static inline struct drm_atomic_state *
+drm_bridge_state_get_atomic_state(struct drm_bridge_state *bridge_state)
+{
+	if (!bridge_state)
+		return NULL;
+
+	return bridge_state->base.state;
+}
+
 struct drm_bridge_state *
 drm_atomic_get_bridge_state(struct drm_atomic_state *state,
 			    struct drm_bridge *bridge);
 struct drm_bridge_state *
 drm_atomic_get_old_bridge_state(const struct drm_atomic_state *state,

-- 
2.47.1