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[media] v4l2: use new flag to enable core priority handling

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Rather than guess which driver supports core priority handling, require drivers
that do to explicitly set the V4L2_FL_USE_FH_PRIO flag in video_device.

Updated the core prio handling accordingly and set the flag in the three
drivers that do.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil
2011-03-22 10:14:07 -03:00
committed by Mauro Carvalho Chehab
parent 2f82441a86
commit b1a873a37b
8 changed files with 27 additions and 14 deletions
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3
include/media/v4l2-dev.h
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@@ -35,7 +35,10 @@ struct v4l2_ctrl_handler;
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)
/* Use the prio field of v4l2_fh for core priority checking */
#define V4L2_FL_USE_FH_PRIO (2)
/* Priority helper functions */