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| author |   Hans Verkuil <hans.verkuil@cisco.com> | 2020-05-07 17:12:52 +0200 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-05-12 17:05:31 +0200 |
| commit | 6446ec6cbf46483737e832cd6050885fa8eb87fa (patch) | |
| tree | aa755171f8db869b92ecf646023c1d9e48cae10a /include/uapi/linux/v4l2-subdev.h | |
| parent | media: v4l2-subdev: Guard whole fops and ioctl hdlr (diff) | |
| download | wireguard-linux-6446ec6cbf46483737e832cd6050885fa8eb87fa.tar.xz wireguard-linux-6446ec6cbf46483737e832cd6050885fa8eb87fa.zip | |
media: v4l2-subdev: add VIDIOC_SUBDEV_QUERYCAP ioctl
While normal video/radio/vbi/swradio nodes have a proper QUERYCAP ioctl
that apps can call to determine that it is indeed a V4L2 device, there
is currently no equivalent for v4l-subdev nodes. Adding this ioctl will
solve that, and it will allow utilities like v4l2-compliance to be used
with these devices as well.
SUBDEV_QUERYCAP currently returns the version and capabilities of the
subdevice. Define a capability flag to report if the subdevice is
registered in read-only mode.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'include/uapi/linux/v4l2-subdev.h')
| -rw-r--r-- | include/uapi/linux/v4l2-subdev.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/uapi/linux/v4l2-subdev.h b/include/uapi/linux/v4l2-subdev.h index 03970ce30741..5d2a1dab7911 100644 --- a/include/uapi/linux/v4l2-subdev.h +++ b/include/uapi/linux/v4l2-subdev.h @@ -155,9 +155,25 @@ struct v4l2_subdev_selection { __u32 reserved[8]; }; +/** + * struct v4l2_subdev_capability - subdev capabilities + * @version: the driver versioning number + * @capabilities: the subdev capabilities, see V4L2_SUBDEV_CAP_* + * @reserved: for future use, set to zero for now + */ +struct v4l2_subdev_capability { + __u32 version; + __u32 capabilities; + __u32 reserved[14]; +}; + +/* The v4l2 sub-device video device node is registered in read-only mode. */ +#define V4L2_SUBDEV_CAP_RO_SUBDEV BIT(0) + /* Backwards compatibility define --- to be removed */ #define v4l2_subdev_edid v4l2_edid +#define VIDIOC_SUBDEV_QUERYCAP _IOR('V', 0, struct v4l2_subdev_capability) #define VIDIOC_SUBDEV_G_FMT _IOWR('V', 4, struct v4l2_subdev_format) #define VIDIOC_SUBDEV_S_FMT _IOWR('V', 5, struct v4l2_subdev_format) #define VIDIOC_SUBDEV_G_FRAME_INTERVAL _IOWR('V', 21, struct v4l2_subdev_frame_interval) |