From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
We need a common function to subscribe all the common events in drivers,
so far we had only V4L2_EVENT_CTRL, so such a function wasn't necessary,
but we are about to introduce a new event for the upcoming explicit fences
implementation, thus a common place is needed.
Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-event.c | 12 ++++++++++++
include/media/v4l2-event.h | 8 ++++++++
2 files changed, 20 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-event.c b/drivers/media/v4l2-core/v4l2-event.c
index 968c2eb08b5a..313ee9d1f9ee 100644
--- a/drivers/media/v4l2-core/v4l2-event.c
+++ b/drivers/media/v4l2-core/v4l2-event.c
@@ -20,6 +20,7 @@
#include <media/v4l2-dev.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
+#include <media/v4l2-ctrls.h>
#include <linux/mm.h>
#include <linux/sched.h>
@@ -354,3 +355,14 @@ int v4l2_src_change_event_subdev_subscribe(struct v4l2_subdev *sd,
return v4l2_src_change_event_subscribe(fh, sub);
}
EXPORT_SYMBOL_GPL(v4l2_src_change_event_subdev_subscribe);
+
+int v4l2_subscribe_event_v4l2(struct v4l2_fh *fh,
+ const struct v4l2_event_subscription *sub)
+{
+ switch (sub->type) {
+ case V4L2_EVENT_CTRL:
+ return v4l2_ctrl_subscribe_event(fh, sub);
+ }
+ return -EINVAL;
+}
+EXPORT_SYMBOL(v4l2_subscribe_event_v4l2);
diff --git a/include/media/v4l2-event.h b/include/media/v4l2-event.h
index 6741910c3a18..2b794f2ad824 100644
--- a/include/media/v4l2-event.h
+++ b/include/media/v4l2-event.h
@@ -236,4 +236,12 @@ int v4l2_src_change_event_subscribe(struct v4l2_fh *fh,
int v4l2_src_change_event_subdev_subscribe(struct v4l2_subdev *sd,
struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
+/**
+ * v4l2_subscribe_event_v4l2 - helper function that subscribe all v4l2 events
+ *
+ * @fh: pointer to struct v4l2_fh
+ * @sub: pointer to &struct v4l2_event_subscription
+ */
+int v4l2_subscribe_event_v4l2(struct v4l2_fh *fh,
+ const struct v4l2_event_subscription *sub);
#endif /* V4L2_EVENT_H */
--
2.13.6
