media: uvcvideo: Send a control event when a Control Change interrupt arrives

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UVC defines a method of handling asynchronous controls, which sends a
USB packet over the interrupt pipe. This patch implements support for
such packets by sending a control event to the user. Since this can
involve USB traffic and, therefore, scheduling, this has to be done
in a work queue.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@intel.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

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Guennadi Liakhovetski 2018-07-26 04:17:53 -04:00 • committed by Mauro Carvalho Chehab

parent 8e7a1dbc7b

commit e5225c820c

5 changed files with 286 additions and 67 deletions

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include/uapi/linux/uvcvideo.h

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