[PATCH v3 08/21] drm/bridge: Add the drm_for_each_bridge_in_chain() helper

[Boris Brezillon <boris.brezillon@collabora.com>]

To iterate over all bridges attached to a specific encoder.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
---
Changes in v3:
* None

Changes in v2:
* New patch
---
 include/drm/drm_bridge.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index 3ab16c95e59e..238e84ab63a3 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -441,6 +441,17 @@ drm_bridge_chain_get_first_bridge(struct drm_encoder *encoder)
 					struct drm_bridge, chain_node);
 }
 
+/**
+ * for_each_bridge_in_chain() - Iterate over all bridges present in a chain
+ * @encoder: the encoder to iterate bridges on
+ * @bridge: a bridge pointer updated to point to the current bridge at each
+ *	    iteration
+ *
+ * Iterate over all bridges present in the bridge chain attached to @encoder.
+ */
+#define drm_for_each_bridge_in_chain(encoder, bridge)			\
+	list_for_each_entry(bridge, &(encoder)->bridge_chain, chain_node)
+
 bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge,
 				 const struct drm_display_mode *mode,
 				 struct drm_display_mode *adjusted_mode);
-- 
2.21.0