video_device is initialized you *do* know which parent PCI device to use and
so you set dev_device to the correct PCI device.
-- flags: optional. Set to V4L2_FL_USE_FH_PRIO if you want to let the framework
- handle the VIDIOC_G/S_PRIORITY ioctls. This requires that you use struct
- v4l2_fh. Eventually this flag will disappear once all drivers use the core
- priority handling. But for now it has to be set explicitly.
-
If you use v4l2_ioctl_ops, then you should set .unlocked_ioctl to video_ioctl2
in your v4l2_file_operations struct.
struct v4l2_fh provides a way to easily keep file handle specific data
that is used by the V4L2 framework. New drivers must use struct v4l2_fh
-since it is also used to implement priority handling (VIDIOC_G/S_PRIORITY)
-if the video_device flag V4L2_FL_USE_FH_PRIO is also set.
+since it is also used to implement priority handling (VIDIOC_G/S_PRIORITY).
The users of v4l2_fh (in the V4L2 framework, not the driver) know
whether a driver uses v4l2_fh as its file->private_data pointer by