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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2012-05-14 07:34:34 (GMT)
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-07-06 18:26:45 (GMT)
commit7078daa020db5ba501fa3de64b8653c221a640b4 (patch)
treea059d8428a04afe29e9bdce18b52b13b2d738651 /include
parent257ee97eeb90aaf70cc891577d69afa63d81ceea (diff)
downloadlinux-7078daa020db5ba501fa3de64b8653c221a640b4.tar.xz
[media] uvcvideo: Document the struct uvc_xu_control_query query field
Several developers have reported that the lack of macros for the struct uvc_xu_control_query query field in uvcvideo.h was confusing and forced them to look at the driver source code to find out what applications were supposed to pass in that field. Add a comment to the header to clarify the expected usage of the query field. Reported-by: Paulo Assis <pj.assis@gmail.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/uvcvideo.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/uvcvideo.h b/include/linux/uvcvideo.h
index f46a53f..3b08186 100644
--- a/include/linux/uvcvideo.h
+++ b/include/linux/uvcvideo.h
@@ -58,7 +58,8 @@ struct uvc_xu_control_mapping {
struct uvc_xu_control_query {
__u8 unit;
__u8 selector;
- __u8 query;
+ __u8 query; /* Video Class-Specific Request Code, */
+ /* defined in linux/usb/video.h A.8. */
__u16 size;
__u8 __user *data;
};