diff options
| author | Ming Lei <tom.leiming@gmail.com> | 2011-07-16 00:51:00 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-08-06 10:42:15 -0300 |
| commit | d59a7b1dbce8b972ec2dc9fcaaae0bfa23687423 (patch) | |
| tree | 303869ee3064b3f8b31f020dc257bbc7599a5743 /drivers/media/video/uvc/uvc_video.c | |
| parent | 9bed77ee2fb46b74782d0d9d14b92e9d07f3df6e (diff) | |
[media] uvcvideo: Set alternate setting 0 on resume if the bus has been reset
If the bus has been reset on resume, set the alternate setting to 0.
This should be the default value, but some devices crash or otherwise
misbehave if they don't receive a SET_INTERFACE request before any other
video control request.
Microdia's 0c45:6437 camera has been found to require this change or it
will stop sending video data after resume.
uvc_video.c]
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: stable@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/uvc/uvc_video.c')
| -rw-r--r-- | drivers/media/video/uvc/uvc_video.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c index 8244167c8915..ffd1158628b6 100644 --- a/drivers/media/video/uvc/uvc_video.c +++ b/drivers/media/video/uvc/uvc_video.c @@ -1104,10 +1104,18 @@ int uvc_video_suspend(struct uvc_streaming *stream) * buffers, making sure userspace applications are notified of the problem * instead of waiting forever. */ -int uvc_video_resume(struct uvc_streaming *stream) +int uvc_video_resume(struct uvc_streaming *stream, int reset) { int ret; + /* If the bus has been reset on resume, set the alternate setting to 0. + * This should be the default value, but some devices crash or otherwise + * misbehave if they don't receive a SET_INTERFACE request before any + * other video control request. + */ + if (reset) + usb_set_interface(stream->dev->udev, stream->intfnum, 0); + stream->frozen = 0; ret = uvc_commit_video(stream, &stream->ctrl); |