V4L/DVB (10087): Add new enum_input function on soc_camera

This patch presents new method to be able to select V4L2 input type
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/soc_camera.c

@@ -125,14 +125,23 @@ static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
 static int soc_camera_enum_input(struct file *file, void *priv,
 				 struct v4l2_input *inp)
 {
+	struct soc_camera_file *icf = file->private_data;
+	struct soc_camera_device *icd = icf->icd;
+	int ret = 0;
+
 	if (inp->index != 0)
 		return -EINVAL;
 
-	inp->type = V4L2_INPUT_TYPE_CAMERA;
-	inp->std = V4L2_STD_UNKNOWN;
-	strcpy(inp->name, "Camera");
+	if (icd->ops->enum_input)
+		ret = icd->ops->enum_input(icd, inp);
+	else {
+		/* default is camera */
+		inp->type = V4L2_INPUT_TYPE_CAMERA;
+		inp->std  = V4L2_STD_UNKNOWN;
+		strcpy(inp->name, "Camera");
+	}
 
-	return 0;
+	return ret;
 }
 
 static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i)

include/media/soc_camera.h

@@ -166,6 +166,7 @@ struct soc_camera_ops {
 	int (*get_chip_id)(struct soc_camera_device *,
 			   struct v4l2_chip_ident *);
 	int (*set_std)(struct soc_camera_device *, v4l2_std_id *);
+	int (*enum_input)(struct soc_camera_device *, struct v4l2_input *);
 #ifdef CONFIG_VIDEO_ADV_DEBUG
 	int (*get_register)(struct soc_camera_device *, struct v4l2_register *);
 	int (*set_register)(struct soc_camera_device *, struct v4l2_register *);