diff options
Diffstat (limited to 'include/drm/drm_bridge.h')
| -rw-r--r-- | include/drm/drm_bridge.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 8d9d4fd078e7..76e05930f50e 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -1321,6 +1321,11 @@ 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 @@ -1411,6 +1416,24 @@ drm_bridge_chain_get_first_bridge(struct drm_encoder *encoder) } /** + * drm_bridge_chain_get_last_bridge() - Get the last bridge in the chain + * @encoder: encoder object + * + * The refcount of the returned bridge is incremented. Use drm_bridge_put() + * when done with it. + * + * RETURNS: + * the last bridge in the chain, or NULL if @encoder has no bridge attached + * to it. + */ +static inline struct drm_bridge * +drm_bridge_chain_get_last_bridge(struct drm_encoder *encoder) +{ + return drm_bridge_get(list_last_entry_or_null(&encoder->bridge_chain, + struct drm_bridge, chain_node)); +} + +/** * drm_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 |