[PATCH v6 3/8] media: uvcvideo: Support minimum for V4L2_CTRL_TYPE_MENU

[Ricardo Ribalda]

Currently all mappings of type V4L2_CTRL_TYPE_MENU, have a minimum of 0,
but there are some controls (limited powerline), that start with a value
different than 0.

Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
---
 drivers/media/usb/uvc/uvc_ctrl.c | 2 +-
 drivers/media/usb/uvc/uvcvideo.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 092decfdaa62..0d89d239e881 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -1144,7 +1144,7 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
 
 	switch (mapping->v4l2_type) {
 	case V4L2_CTRL_TYPE_MENU:
-		v4l2_ctrl->minimum = 0;
+		v4l2_ctrl->minimum = mapping->menu_min;
 		v4l2_ctrl->maximum = mapping->menu_count - 1;
 		v4l2_ctrl->step = 1;
 
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index fff5c5c99a3d..6ceb7f7b964d 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -254,6 +254,7 @@ struct uvc_control_mapping {
 	u32 data_type;
 
 	const struct uvc_menu_info *menu_info;
+	u32 menu_min;
 	u32 menu_count;
 
 	u32 master_id;
-- 
2.36.1.476.g0c4daa206d-goog