From: John Bauer <johnebgood@xxxxxxxxxxxxxxxx>
Made additional recommended changes from Ricardo. Relative
controls are now checked with helper function is_relative_ptz_ctrl().
Signed-off-by: John Bauer <johnebgood@xxxxxxxxxxxxxxxx>
---
drivers/media/usb/uvc/uvc_ctrl.c | 40 +++++++++++++++++++---------------------
1 file changed, 19 insertions(+), 21 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 04300a782c81..34a9a29b0754 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -441,7 +441,6 @@ static s32 uvc_ctrl_get_rel_speed(struct uvc_control_mapping *mapping,
return (rel == 0) ? 0 : (rel > 0 ? data[first+1]
: -data[first+1]);
case UVC_GET_MIN:
- return -data[first+1];
case UVC_GET_MAX:
case UVC_GET_RES:
case UVC_GET_DEF:
@@ -1233,6 +1232,17 @@ static u32 uvc_get_ctrl_bitmap(struct uvc_control *ctrl,
return ~0;
}
+static bool is_relative_ptz_ctrl(__u32 ctrl_id)
+{
+ switch (ctrl_id) {
+ case V4L2_CID_ZOOM_CONTINUOUS:
+ case V4L2_CID_PAN_SPEED:
+ case V4L2_CID_TILT_SPEED:
+ return true;
+ }
+ return false;
+}
+
static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
@@ -1327,22 +1337,16 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) {
- switch (v4l2_ctrl->id) {
- case V4L2_CID_ZOOM_CONTINUOUS:
- case V4L2_CID_PAN_SPEED:
- case V4L2_CID_TILT_SPEED:
- /*
- * For the relative speed implementation the minimum
- * value cannot be probed so it becomes the additive
- * inverse of maximum.
- */
+ /*
+ * For the relative speed implementation the minimum
+ * value cannot be probed so it becomes the additive
+ * inverse of maximum.
+ */
+ if (is_relative_ptz_ctrl(v4l2_ctrl->id))
v4l2_ctrl->minimum = -v4l2_ctrl->maximum;
- break;
- default:
+ else
v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN));
- break;
- }
}
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)
@@ -1935,14 +1939,8 @@ int uvc_ctrl_set(struct uvc_fh *handle,
* value cannot be probed so it becomes the additive
* inverse of maximum.
*/
- switch (xctrl->id) {
- case V4L2_CID_ZOOM_CONTINUOUS:
- case V4L2_CID_PAN_SPEED:
- case V4L2_CID_TILT_SPEED:
+ if (is_relative_ptz_ctrl(xctrl->id))
min = -max;
- default:
- break;
- }
step = mapping->get(mapping, UVC_GET_RES,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
--
2.34.1
