diff options
| -rw-r--r-- | include/drm/drm_bridge.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 884ff1faa4c8..cdad3b78a195 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -958,6 +958,38 @@ static inline struct drm_bridge *of_drm_find_bridge(struct device_node *np) #endif /** + * drm_bridge_get_current_state() - Get the current bridge state + * @bridge: bridge object + * + * This function must be called with the modeset lock held. + * + * RETURNS: + * + * The current bridge state, or NULL if there is none. + */ +static inline struct drm_bridge_state * +drm_bridge_get_current_state(struct drm_bridge *bridge) +{ + if (!bridge) + return NULL; + + /* + * Only atomic bridges will have bridge->base initialized by + * drm_atomic_private_obj_init(), so we need to make sure we're + * working with one before we try to use the lock. + */ + if (!bridge->funcs || !bridge->funcs->atomic_reset) + return NULL; + + drm_modeset_lock_assert_held(&bridge->base.lock); + + if (!bridge->base.state) + return NULL; + + return drm_priv_to_bridge_state(bridge->base.state); +} + +/** * drm_bridge_get_next_bridge() - Get the next bridge in the chain * @bridge: bridge object * |