diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/drm/drm_panel.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h index c6cf75909389..d6c73f79c131 100644 --- a/include/drm/drm_panel.h +++ b/include/drm/drm_panel.h @@ -27,12 +27,14 @@ #include <linux/err.h> #include <linux/errno.h> #include <linux/list.h> +#include <linux/mutex.h> struct backlight_device; struct dentry; struct device_node; struct drm_connector; struct drm_device; +struct drm_panel_follower; struct drm_panel; struct display_timing; @@ -144,6 +146,45 @@ struct drm_panel_funcs { void (*debugfs_init)(struct drm_panel *panel, struct dentry *root); }; +struct drm_panel_follower_funcs { + /** + * @panel_prepared: + * + * Called after the panel has been powered on. + */ + int (*panel_prepared)(struct drm_panel_follower *follower); + + /** + * @panel_unpreparing: + * + * Called before the panel is powered off. + */ + int (*panel_unpreparing)(struct drm_panel_follower *follower); +}; + +struct drm_panel_follower { + /** + * @funcs: + * + * Dependent device callbacks; should be initted by the caller. + */ + const struct drm_panel_follower_funcs *funcs; + + /** + * @list + * + * Used for linking into panel's list; set by drm_panel_add_follower(). + */ + struct list_head list; + + /** + * @panel + * + * The panel we're dependent on; set by drm_panel_add_follower(). + */ + struct drm_panel *panel; +}; + /** * struct drm_panel - DRM panel object */ @@ -190,6 +231,20 @@ struct drm_panel { struct list_head list; /** + * @followers: + * + * A list of struct drm_panel_follower dependent on this panel. + */ + struct list_head followers; + + /** + * @followers_lock: + * + * Lock for followers list. + */ + struct mutex follower_lock; + + /** * @prepare_prev_first: * * The previous controller should be prepared first, before the prepare @@ -246,6 +301,33 @@ static inline int of_drm_get_panel_orientation(const struct device_node *np, } #endif +#if defined(CONFIG_DRM_PANEL) +bool drm_is_panel_follower(struct device *dev); +int drm_panel_add_follower(struct device *follower_dev, + struct drm_panel_follower *follower); +void drm_panel_remove_follower(struct drm_panel_follower *follower); +int devm_drm_panel_add_follower(struct device *follower_dev, + struct drm_panel_follower *follower); +#else +static inline bool drm_is_panel_follower(struct device *dev) +{ + return false; +} + +static inline int drm_panel_add_follower(struct device *follower_dev, + struct drm_panel_follower *follower) +{ + return -ENODEV; +} + +static inline void drm_panel_remove_follower(struct drm_panel_follower *follower) { } +static inline int devm_drm_panel_add_follower(struct device *follower_dev, + struct drm_panel_follower *follower) +{ + return -ENODEV; +} +#endif + #if IS_ENABLED(CONFIG_DRM_PANEL) && (IS_BUILTIN(CONFIG_BACKLIGHT_CLASS_DEVICE) || \ (IS_MODULE(CONFIG_DRM) && IS_MODULE(CONFIG_BACKLIGHT_CLASS_DEVICE))) int drm_panel_of_backlight(struct drm_panel *panel); |