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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2012-05-14 09:34:34 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-07-06 20:26:45 +0200 |
| commit | 7078daa020db5ba501fa3de64b8653c221a640b4 (patch) | |
| tree | a059d8428a04afe29e9bdce18b52b13b2d738651 /include | |
| parent | [media] drxk: Improve logging (diff) | |
| download | linux-7078daa020db5ba501fa3de64b8653c221a640b4.tar.xz linux-7078daa020db5ba501fa3de64b8653c221a640b4.zip | |
[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.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 { 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; }; |