dm: video: bridge: add operation to read EDID

Add an operation to read EDID, since bridge may have ability to read
EDID from the panel that is connected to it, for example LCD<->eDP bridge.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>

diff --git a/drivers/video/bridge/video-bridge-uclass.c b/drivers/video/bridge/video-bridge-uclass.c
index 07270ba..79facd0 100644 (file)
--- a/drivers/video/bridge/video-bridge-uclass.c
+++ b/drivers/video/bridge/video-bridge-uclass.c
@@ -8,6 +8,7 @@
 #include <common.h>
 #include <dm.h>
 #include <errno.h>
+#include <edid.h>
 #include <video_bridge.h>
 
 int video_bridge_set_backlight(struct udevice *dev, int percent)
@@ -45,6 +46,15 @@ int video_bridge_check_attached(struct udevice *dev)
        return ops->check_attached(dev);
 }
 
+int video_bridge_read_edid(struct udevice *dev, u8 *buf, int buf_size)
+{
+       struct video_bridge_ops *ops = video_bridge_get_ops(dev);
+
+       if (!ops || !ops->read_edid)
+               return -ENOSYS;
+       return ops->read_edid(dev, buf, buf_size);
+}
+
 static int video_bridge_pre_probe(struct udevice *dev)
 {
        struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev);

diff --git a/include/video_bridge.h b/include/video_bridge.h
index c7b8681..0699a8d 100644 (file)
--- a/include/video_bridge.h
+++ b/include/video_bridge.h
@@ -53,6 +53,16 @@ struct video_bridge_ops {
         * @return 0 if OK, -ve on error
         */
        int (*set_backlight)(struct udevice *dev, int percent);
+
+       /**
+        * read_edid() - Read information from EDID
+        *
+        * @dev:        Device to read from
+        * @buf:        Buffer to read into
+        * @buf_size:   Buffer size
+        * @return number of bytes read, <=0 for error
+        */
+       int (*read_edid)(struct udevice *dev, u8 *buf, int buf_size);
 };
 
 #define video_bridge_get_ops(dev) \
@@ -89,4 +99,14 @@ int video_bridge_set_active(struct udevice *dev, bool active);
  */
 int video_bridge_check_attached(struct udevice *dev);
 
+/**
+ * video_bridge_read_edid() - Read information from EDID
+ *
+ * @dev:       Device to read from
+ * @buf:       Buffer to read into
+ * @buf_size:  Buffer size
+ * @return number of bytes read, <=0 for error
+ */
+int video_bridge_read_edid(struct udevice *dev, u8 *buf, int buf_size);
+
 #endif