media: v4l2-dev: Add v4l2_device_register_ro_subdev_node()

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Add to the V4L2 core a function to register device nodes for video
subdevices in read-only mode.

Registering a device node in read-only mode is useful to expose to
userspace the current sub-device configuration, without allowing
application to change it by using the V4L2 subdevice ioctls.

Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

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Jacopo Mondi 2020-05-07 17:12:50 +02:00 • committed by Mauro Carvalho Chehab

parent 3fb0ee8b3b

commit f75c431e54

4 changed files with 77 additions and 6 deletions

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7

include/media/v4l2-dev.h

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52

include/media/v4l2-device.h

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