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[media] uvcvideo: add support for VIDIOC_QUERY_EXT_CTRL 

Add support for the new VIDIOC_QUERY_EXT_CTRL ioctl. Since uvc doesn't use
the control framework, support for this ioctl isn't automatic.

This is makes v4l2-compliance happy as well.

[Added blank lines for improved readability]

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2015-03-14 14:04:00 -03:00 committed by Mauro Carvalho Chehab
parent 1461fe7ab6
commit e183201b9e
1 changed files with 30 additions and 0 deletions
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30
drivers/media/usb/uvc/uvc_v4l2.c
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@ -882,6 +882,35 @@ static int uvc_ioctl_queryctrl(struct file *file, void *fh,
return uvc_query_v4l2_ctrl(chain, qc);
}
static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh,
struct v4l2_query_ext_ctrl *qec)
{
struct uvc_fh *handle = fh;
struct uvc_video_chain *chain = handle->chain;
struct v4l2_queryctrl qc = { qec->id };
int ret;
ret = uvc_query_v4l2_ctrl(chain, &qc);
if (ret)
return ret;
qec->id = qc.id;
qec->type = qc.type;
strlcpy(qec->name, qc.name, sizeof(qec->name));
qec->minimum = qc.minimum;
qec->maximum = qc.maximum;
qec->step = qc.step;
qec->default_value = qc.default_value;
qec->flags = qc.flags;
qec->elem_size = 4;
qec->elems = 1;
qec->nr_of_dims = 0;
memset(qec->dims, 0, sizeof(qec->dims));
memset(qec->reserved, 0, sizeof(qec->reserved));
return 0;
}
static int uvc_ioctl_g_ctrl(struct file *file, void *fh,
struct v4l2_control *ctrl)
{
@ -1457,6 +1486,7 @@ const struct v4l2_ioctl_ops uvc_ioctl_ops = {
.vidioc_g_input = uvc_ioctl_g_input,
.vidioc_s_input = uvc_ioctl_s_input,
.vidioc_queryctrl = uvc_ioctl_queryctrl,
.vidioc_query_ext_ctrl = uvc_ioctl_query_ext_ctrl,
.vidioc_g_ctrl = uvc_ioctl_g_ctrl,
.vidioc_s_ctrl = uvc_ioctl_s_ctrl,
.vidioc_g_ext_ctrls = uvc_ioctl_g_ext_ctrls,