diff options
author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2012-05-14 03:34:34 -0400 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-07-06 14:26:45 -0400 |
commit | 7078daa020db5ba501fa3de64b8653c221a640b4 (patch) | |
tree | a059d8428a04afe29e9bdce18b52b13b2d738651 | |
parent | 257ee97eeb90aaf70cc891577d69afa63d81ceea (diff) |
[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>
-rw-r--r-- | include/linux/uvcvideo.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/uvcvideo.h b/include/linux/uvcvideo.h index f46a53f060d7..3b081862b9e8 100644 --- a/include/linux/uvcvideo.h +++ b/include/linux/uvcvideo.h | |||
@@ -58,7 +58,8 @@ struct uvc_xu_control_mapping { | |||
58 | struct uvc_xu_control_query { | 58 | struct uvc_xu_control_query { |
59 | __u8 unit; | 59 | __u8 unit; |
60 | __u8 selector; | 60 | __u8 selector; |
61 | __u8 query; | 61 | __u8 query; /* Video Class-Specific Request Code, */ |
62 | /* defined in linux/usb/video.h A.8. */ | ||
62 | __u16 size; | 63 | __u16 size; |
63 | __u8 __user *data; | 64 | __u8 __user *data; |
64 | }; | 65 | }; |