diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2011-06-29 08:56:22 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-07-27 17:53:34 -0300 |
| commit | 60c0732244164f14e376cfae493dba368f761514 (patch) | |
| tree | 104e04777d3239dabb1c4dba20ec17a7b1089c86 /drivers/media/video/v4l2-ctrls.c | |
| parent | 3ad57c33846d884cfeed770238b27f3dcf3742f1 (diff) | |
[media] v4l2-ctrls.c: add support for V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK
Normally no control events will go to the filehandle that called the
VIDIOC_S_CTRL/VIDIOC_S_EXT_CTRLS ioctls. This is to prevent a feedback
loop.
This can now be overridden by setting the new V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK
flag.
Based on suggestions from Mauro Carvalho Chehab <mchehab@redhat.com> and
Laurent Pinchart <laurent.pinchart@ideasonboard.com>.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/v4l2-ctrls.c')
| -rw-r--r-- | drivers/media/video/v4l2-ctrls.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c index a037739868e0..37a50e57f222 100644 --- a/drivers/media/video/v4l2-ctrls.c +++ b/drivers/media/video/v4l2-ctrls.c @@ -590,7 +590,8 @@ static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes) fill_event(&ev, ctrl, changes); list_for_each_entry(sev, &ctrl->ev_subs, node) - if (sev->fh && sev->fh != fh) + if (sev->fh && (sev->fh != fh || + (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))) v4l2_event_queue_fh(sev->fh, &ev); } |