From b08d8d26f4520187e09191f0c45374383b5a74eb Mon Sep 17 00:00:00 2001 From: Ricardo Ribalda Date: Fri, 20 Mar 2015 10:30:46 -0300 Subject: [PATCH] [media] media/v4l2-ctrls: volatiles should not generate CH_VALUE Volatile controls should not generate CH_VALUE events. Set has_changed to false to prevent this happening. Signed-off-by: Ricardo Ribalda Delgado Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/v4l2-core/v4l2-ctrls.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c index 45c5b47..2ebc33e 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls.c +++ b/drivers/media/v4l2-core/v4l2-ctrls.c @@ -1609,6 +1609,15 @@ static int cluster_changed(struct v4l2_ctrl *master) if (ctrl == NULL) continue; + /* + * Set has_changed to false to avoid generating + * the event V4L2_EVENT_CTRL_CH_VALUE + */ + if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) { + ctrl->has_changed = false; + continue; + } + for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++) ctrl_changed = !ctrl->type_ops->equal(ctrl, idx, ctrl->p_cur, ctrl->p_new); -- 2.7.4