This allows standalone connectors to be registered and found again through their devicetree node when going through their connection graph.
Setting the of_node property is of course still optional, as it is not necessary in most cases to lookup connectors that are part of a bigger component.
Signed-off-by: Heiko Stuebner heiko@sntech.de --- drivers/gpu/drm/drm_crtc.c | 41 +++++++++++++++++++++++++++++++++++++++++ include/drm/drm_crtc.h | 7 +++++++ 2 files changed, 48 insertions(+)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index b63e69d..8b49ea7 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -852,6 +852,47 @@ static void drm_connector_get_cmdline_mode(struct drm_connector *connector) mode->interlace ? " interlaced" : ""); }
+static DEFINE_MUTEX(connector_lock); +static LIST_HEAD(connector_list); + +int drm_connector_add(struct drm_connector *connector) +{ + mutex_lock(&connector_lock); + list_add_tail(&connector->list, &connector_list); + mutex_unlock(&connector_lock); + + return 0; +} +EXPORT_SYMBOL(drm_connector_add); + +void drm_connector_remove(struct drm_connector *connector) +{ + mutex_lock(&connector_lock); + list_del_init(&connector->list); + mutex_unlock(&connector_lock); +} +EXPORT_SYMBOL(drm_connector_remove); + +#ifdef CONFIG_OF +struct drm_connector *of_drm_find_connector(struct device_node *np) +{ + struct drm_connector *connector; + + mutex_lock(&connector_lock); + + list_for_each_entry(connector, &connector_list, list) { + if (connector->of_node == np) { + mutex_unlock(&connector_lock); + return connector; + } + } + + mutex_unlock(&connector_lock); + return NULL; +} +EXPORT_SYMBOL(of_drm_find_connector); +#endif + /** * drm_connector_init - Init a preallocated connector * @dev: DRM device diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 76994ba..37b230b 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -671,6 +671,10 @@ struct drm_encoder { */ struct drm_connector { struct drm_device *dev; +#ifdef CONFIG_OF + struct device_node *of_node; +#endif + struct list_head list; struct device *kdev; struct device_attribute *attr; struct list_head head; @@ -1213,6 +1217,9 @@ static inline uint32_t drm_crtc_mask(struct drm_crtc *crtc)
extern void drm_connector_ida_init(void); extern void drm_connector_ida_destroy(void); +extern int drm_connector_add(struct drm_connector *connector); +extern void drm_connector_remove(struct drm_connector *connector); +extern struct drm_connector *of_drm_find_connector(struct device_node *np); extern int drm_connector_init(struct drm_device *dev, struct drm_connector *connector, const struct drm_connector_funcs *funcs,