[media] uvcvideo: Support allocating buffers larger than the current frame size
authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Tue, 18 Feb 2014 13:40:47 +0000 (10:40 -0300)
committerMauro Carvalho Chehab <m.chehab@samsung.com>
Fri, 28 Feb 2014 16:24:00 +0000 (13:24 -0300)
commitbddb9d0e97f20dfd614d3dd56043418766703936
tree3a2bfc75e83a9d981e705ccbffca290faa960193
parentccc135c380338ccc6643f6dd7f16000ae7384a13
[media] uvcvideo: Support allocating buffers larger than the current frame size

The queue_setup handler takes an optional format argument that can be
used to allocate buffers for a format different than the current format.
The uvcvideo driver doesn't support changing the format when buffers
have been allocated, but there's no reason not to support allocating
buffers larger than the minimum size.

When the format argument isn't NULL verify that the requested image size
is large enough for the current format and use it for the buffer size.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
drivers/media/usb/uvc/uvc_queue.c