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Commit 7078daa0 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Mauro Carvalho Chehab
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[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: default avatarPaulo Assis <pj.assis@gmail.com>
Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 257ee97e

include/linux/uvcvideo.h

+2 −1
Original line number Diff line number Diff line
@@ -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;

};