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media: v4l2-dev: document video_device flags

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Convert #defines to enums and add kernel-doc markups for V4L2
video_device flags.

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 14:05:25 -04:00
parent 468fde0b79
commit 63b31ffd1c
1 changed files with 18 additions and 7 deletions
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25
include/media/v4l2-dev.h
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@ -62,12 +62,22 @@ struct video_device;
struct v4l2_device;
struct v4l2_ctrl_handler;
/* Flag to mark the video_device struct as registered.
Drivers can clear this flag if they want to block all future
device access. It is cleared by video_unregister_device. */
#define V4L2_FL_REGISTERED (0)
/* file->private_data points to struct v4l2_fh */
#define V4L2_FL_USES_V4L2_FH (1)
/**
* enum v4l2_video_device_flags - Flags used by &struct video_device
*
* @V4L2_FL_REGISTERED:
* indicates that a &struct video_device is registered.
* Drivers can clear this flag if they want to block all future
* device access. It is cleared by video_unregister_device.
* @V4L2_FL_USES_V4L2_FH:
* indicates that file->private_data points to &struct v4l2_fh.
* This flag is set by the core when v4l2_fh_init() is called.
* All new drivers should use it.
*/
enum v4l2_video_device_flags {
V4L2_FL_REGISTERED = 0,
V4L2_FL_USES_V4L2_FH = 1,
};
/* Priority helper functions */
@ -215,7 +225,8 @@ struct v4l2_file_operations {
* @vfl_dir: V4L receiver, transmitter or m2m
* @minor: device node 'minor'. It is set to -1 if the registration failed
* @num: number of the video device node
* @flags: video device flags. Use bitops to set/clear/test flags
* @flags: video device flags. Use bitops to set/clear/test flags.
* Contains a set of &enum v4l2_video_device_flags.
* @index: attribute to differentiate multiple indices on one physical device
* @fh_lock: Lock for all v4l2_fhs
* @fh_list: List of &struct v4l2_fh