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

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Message-Id: <20250115-bridge-connector-v1-24-9a2fecd886a6@kernel.org>
Date: Wed, 15 Jan 2025 22:05:31 +0100
From: Maxime Ripard <mripard@...nel.org>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>, Andrzej Hajda <andrzej.hajda@...el.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Douglas Anderson <dianders@...omium.org>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Maxime Ripard <mripard@...nel.org>
Subject: [PATCH 24/29] drm/bridge: Provide a helper to get the global state
 from a bridge state

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@...nel.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