Volatile controls should not generate CH_VALUE events.
Set has_changed to false to prevent this happening.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.riba...@gmail.com>
---
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..627d4c7 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);
--
2.1.4
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