diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index 6ee8897..95d1c91 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -26,6 +26,12 @@
 #define VFL_TYPE_SUBDEV		3
 #define VFL_TYPE_MAX		4
 
+/* Is this a receiver, transmitter or mem-to-mem? */
+/* Ignored for VFL_TYPE_SUBDEV. */
+#define VFL_DIR_RX		0
+#define VFL_DIR_TX		1
+#define VFL_DIR_M2M		2
+
 struct v4l2_ioctl_callbacks;
 struct video_device;
 struct v4l2_device;
@@ -105,7 +111,8 @@
 
 	/* device info */
 	char name[32];
-	int vfl_type;
+	int vfl_type;	/* device type */
+	int vfl_dir;	/* receiver, transmitter or m2m */
 	/* 'minor' is set to -1 if the registration failed */
 	int minor;
 	u16 num;