[media] v4l2-dev: add new VFL_DIR_ defines

These will be used by v4l2-dev.c to improve ioctl checking.
I.e. ioctls for capture should return -ENOTTY when called for
an output device.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index 6ee8897c47e9035ab491541e972395d094c91916..95d1c91770f4a4d37d6931b607ab4ae94d2a34a0 100644 (file)
--- 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 @@ struct video_device
 
        /* 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;