media: vimc: fix control event handling

The sensor subdev didn't handle control events. Add support for this.
Found with v4l2-compliance.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
diff --git a/drivers/media/platform/vimc/vimc-sensor.c b/drivers/media/platform/vimc/vimc-sensor.c
index 457e211..54184cd 100644
--- a/drivers/media/platform/vimc/vimc-sensor.c
+++ b/drivers/media/platform/vimc/vimc-sensor.c
@@ -23,6 +23,7 @@
 #include <linux/v4l2-mediabus.h>
 #include <linux/vmalloc.h>
 #include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
 #include <media/v4l2-subdev.h>
 #include <media/tpg/v4l2-tpg.h>
 
@@ -284,11 +285,18 @@
 	return 0;
 }
 
+static struct v4l2_subdev_core_ops vimc_sen_core_ops = {
+	.log_status = v4l2_ctrl_subdev_log_status,
+	.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
 static const struct v4l2_subdev_video_ops vimc_sen_video_ops = {
 	.s_stream = vimc_sen_s_stream,
 };
 
 static const struct v4l2_subdev_ops vimc_sen_ops = {
+	.core = &vimc_sen_core_ops,
 	.pad = &vimc_sen_pad_ops,
 	.video = &vimc_sen_video_ops,
 };