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[media] uvcvideo: Fix reading the current exposure value of UVC 

V4L2_CID_EXPOSURE_ABSOLUTE property does not return an updated value when
autoexposure (V4L2_CID_EXPOSURE_AUTO) is turned on. This patch fixes this
issue by adding the UVC_CTRL_FLAG_AUTO_UPDATE flag.

Tested on a C920 camera.

Signed-off-by: Anton V. Shokurov <shokurov.anton.v@yandex.ru>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Anton V. Shokurov 2015-10-18 19:01:26 -02:00 committed by Mauro Carvalho Chehab
parent f0b0faff78
commit 1ab8c3fc75
1 changed files with 2 additions and 1 deletions
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3
drivers/media/usb/uvc/uvc_ctrl.c
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@ -227,7 +227,8 @@ static struct uvc_control_info uvc_ctrls[] = {
.size = 4,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE,
| UVC_CTRL_FLAG_RESTORE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,