Some code needing to know whether a bridge is the last in a chain currently call drm_bridge_get_next_bridge(). However drm_bridge_get_next_bridge() will soon increment the refcount of the returned bridge, which would make such code more annoying to write.
In preparation for drm_bridge_get_next_bridge() to increment the refcount, as well as to simplify such code, introduce a simple bool function to tell whether a bridge is the last in the chain. Signed-off-by: Luca Ceresoli <[email protected]> --- include/drm/drm_bridge.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 9a7e9dd8cbfa54eedb82981032a25009e845a037..c2a7a7d2dfc420e9dcf7ea4c093ce1f1b939c820 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -1264,6 +1264,11 @@ static inline struct drm_bridge *of_drm_find_bridge(struct device_node *np) } #endif +static inline bool drm_bridge_is_last(struct drm_bridge *bridge) +{ + return list_is_last(&bridge->chain_node, &bridge->encoder->bridge_chain); +} + /** * drm_bridge_get_current_state() - Get the current bridge state * @bridge: bridge object -- 2.50.0
