diff options
Diffstat (limited to 'include/drm/drm_bridge.h')
| -rw-r--r-- | include/drm/drm_bridge.h | 47 |
1 files changed, 44 insertions, 3 deletions
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index b0e6653ee42e..76e05930f50e 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -23,6 +23,7 @@ #ifndef __DRM_BRIDGE_H__ #define __DRM_BRIDGE_H__ +#include <linux/cleanup.h> #include <linux/ctype.h> #include <linux/list.h> #include <linux/mutex.h> @@ -1171,6 +1172,10 @@ struct drm_bridge { */ bool pre_enable_prev_first; /** + * @support_hdcp: Indicate that the bridge supports HDCP. + */ + bool support_hdcp; + /** * @ddc: Associated I2C adapter for DDC access, if any. */ struct i2c_adapter *ddc; @@ -1276,6 +1281,9 @@ drm_priv_to_bridge(struct drm_private_obj *priv) struct drm_bridge *drm_bridge_get(struct drm_bridge *bridge); void drm_bridge_put(struct drm_bridge *bridge); +/* Cleanup action for use with __free() */ +DEFINE_FREE(drm_bridge_put, struct drm_bridge *, if (_T) drm_bridge_put(_T)) + void *__devm_drm_bridge_alloc(struct device *dev, size_t size, size_t offset, const struct drm_bridge_funcs *funcs); @@ -1313,6 +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 @@ -1365,6 +1378,13 @@ drm_bridge_get_next_bridge(struct drm_bridge *bridge) * drm_bridge_get_prev_bridge() - Get the previous bridge in the chain * @bridge: bridge object * + * The caller is responsible of having a reference to @bridge via + * drm_bridge_get() or equivalent. This function leaves the refcount of + * @bridge unmodified. + * + * The refcount of the returned bridge is incremented. Use drm_bridge_put() + * when done with it. + * * RETURNS: * the previous bridge in the chain, or NULL if @bridge is the first. */ @@ -1374,13 +1394,16 @@ drm_bridge_get_prev_bridge(struct drm_bridge *bridge) if (list_is_first(&bridge->chain_node, &bridge->encoder->bridge_chain)) return NULL; - return list_prev_entry(bridge, chain_node); + return drm_bridge_get(list_prev_entry(bridge, chain_node)); } /** * drm_bridge_chain_get_first_bridge() - Get the first 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 first bridge in the chain, or NULL if @encoder has no bridge attached * to it. @@ -1388,8 +1411,26 @@ drm_bridge_get_prev_bridge(struct drm_bridge *bridge) static inline struct drm_bridge * drm_bridge_chain_get_first_bridge(struct drm_encoder *encoder) { - return list_first_entry_or_null(&encoder->bridge_chain, - struct drm_bridge, chain_node); + return drm_bridge_get(list_first_entry_or_null(&encoder->bridge_chain, + struct drm_bridge, chain_node)); +} + +/** + * 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)); } /** |