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.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/usb/uvc/uvc_v4l2.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 43e953f..100e5c1 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -882,6 +882,33 @@ 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)
{
@@ -1443,6 +1470,7 @@ 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,
--
2.1.4
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