media: i2c: max96717: add HAS_EVENTS support

Controls can be exposed to userspace via a v4l-subdevX device, and
userspace has to be able to subscribe to control events so that it is
notified when the control changes value.
Add missing HAS_EVENTS support: flag and .(un)subscribe_event().

Signed-off-by: Tommaso Merciai <tomm.merciai@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/i2c/max96717.c b/drivers/media/i2c/max96717.c
index 4e85b8eb1e776772cde50aa445d2ee0d564b0ca4..755e27271b1b3e50ddb76b358d03e24f467de995 100644 (file)
--- a/drivers/media/i2c/max96717.c
+++ b/drivers/media/i2c/max96717.c
@@ -17,6 +17,7 @@
 
 #include <media/v4l2-cci.h>
 #include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
 #include <media/v4l2-fwnode.h>
 #include <media/v4l2-subdev.h>
 
@@ -576,6 +577,8 @@ static const struct v4l2_subdev_pad_ops max96717_pad_ops = {
 
 static const struct v4l2_subdev_core_ops max96717_subdev_core_ops = {
        .log_status = max96717_log_status,
+       .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+       .unsubscribe_event = v4l2_event_subdev_unsubscribe,
 };
 
 static const struct v4l2_subdev_internal_ops max96717_internal_ops = {
@@ -689,7 +692,8 @@ static int max96717_subdev_init(struct max96717_priv *priv)
                goto err_free_ctrl;
        }
 
-       priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_STREAMS;
+       priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
+                         V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_STREAMS;
        priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
        priv->sd.entity.ops = &max96717_entity_ops;