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media: v4l2-dev: document VFL_DIR_* direction defines 

The V4L_DIR_* direction flags document the direction for a
V4L2 device node. Convert them to enum and document.

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab 2017-10-05 13:52:19 -04:00
parent 1ac051631a
commit 468fde0b79
1 changed files with 16 additions and 6 deletions
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22
include/media/v4l2-dev.h
View File

@ -41,11 +41,21 @@ enum vfl_devnode_type {
};
#define VFL_TYPE_MAX VFL_TYPE_TOUCH
/* 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
/**
* enum vfl_direction - Identifies if a &struct video_device corresponds
* to a receiver, a transmitter or a mem-to-mem device.
*
* @VFL_DIR_RX: device is a receiver.
* @VFL_DIR_TX: device is a transmitter.
* @VFL_DIR_M2M: device is a memory to memory device.
*
* Note: Ignored if &enum vfl_devnode_type is %VFL_TYPE_SUBDEV.
*/
enum vfl_devnode_direction {
VFL_DIR_RX,
VFL_DIR_TX,
VFL_DIR_M2M,
};
struct v4l2_ioctl_callbacks;
struct video_device;
@ -250,7 +260,7 @@ struct video_device
/* device info */
char name[32];
enum vfl_devnode_type vfl_type;
int vfl_dir;
enum vfl_devnode_direction vfl_dir;
int minor;
u16 num;
unsigned long flags;