From: Martin Rubli <martin_rubli@logitech.com>
Date: Sat, 2 Oct 2010 22:10:16 +0000 (-0300)
Subject: [media] uvcvideo: Add UVCIOC_CTRL_QUERY ioctl
X-Git-Tag: v3.0-rc1~322^2~95
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fe78d187fe792fac5d190b19a2806c23df28891e;p=pandora-kernel.git

[media] uvcvideo: Add UVCIOC_CTRL_QUERY ioctl

This ioctl extends UVCIOC_CTRL_GET/SET by not only allowing to get/set
XU controls but to also send arbitrary UVC commands to XU controls,
namely GET_CUR, SET_CUR, GET_MIN, GET_MAX, GET_RES, GET_LEN, GET_INFO
and GET_DEF. This is required for applications to work with XU controls,
so that they can properly query the size and allocate the necessary
buffers.

Signed-off-by: Martin Rubli <martin_rubli@logitech.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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