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media: v4l2-device.h: add v4l2_device_supports_requests() helper 

Add a simple helper function that tests if the driver supports
the request API.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Hans Verkuil 2018-05-23 07:11:06 -04:00 committed by Mauro Carvalho Chehab
parent 0ca0e8442d
commit 93a9d9008d
1 changed files with 11 additions and 0 deletions
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11
include/media/v4l2-device.h
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@ -211,6 +211,17 @@ static inline void v4l2_subdev_notify(struct v4l2_subdev *sd,
sd->v4l2_dev->notify(sd, notification, arg);
}
/**
* v4l2_device_supports_requests - Test if requests are supported.
*
* @v4l2_dev: pointer to struct v4l2_device
*/
static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev)
{
return v4l2_dev->mdev && v4l2_dev->mdev->ops &&
v4l2_dev->mdev->ops->req_queue;
}
/* Helper macros to iterate over all subdevs. */
/**