drm/connector: add functionality to register connectors to a global list
From: Heiko Stuebner <heiko@...> Date: Sun, 22 Mar 2015 18:13:05 +0100
Commit-Message
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@...>
Patch-Comment
drivers/gpu/drm/drm_crtc.c | 41 +++++++++++++++++++++++++++++++++++++++++ include/drm/drm_crtc.h | 7 +++++++ 2 files changed, 48 insertions(+)
Statistics
- 48 lines added
- 0 lines removed
Changes
-------------------------- drivers/gpu/drm/drm_crtc.c --------------------------
index b63e69d..8b49ea7 100644
@@ -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
---------------------------- include/drm/drm_crtc.h ----------------------------
index 76994ba..37b230b 100644
@@ -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,