[PATCH] media: i2c: ov5693: Support control events

[PATCH] media: i2c: ov5693: Support control events

[Simon Kruse]

The sensor subdev exposes controls but does not implement the control
event operations, so VIDIOC_SUBSCRIBE_EVENT fails and v4l2-compliance
reports:

  fail: v4l2-test-controls.cpp(1128): subscribe event for control 'User Controls' failed
  test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: FAIL

Add the standard control event subdev operations and set
V4L2_SUBDEV_FL_HAS_EVENTS.

Signed-off-by: Simon Kruse <simon0x+git@proton.me>
---
Tested on a Microsoft Surface Pro 9 (Intel Alder Lake, IPU6, OVTI5693) with
media-committers next at d7e7bca71. v4l2-compliance 1.32.0 on the sensor
subdev node: 45/46 without this patch, 46/46 with it.

 drivers/media/i2c/ov5693.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/ov5693.c b/drivers/media/i2c/ov5693.c
index 56599f9ca..5cddd46b3 100644
--- a/drivers/media/i2c/ov5693.c
+++ b/drivers/media/i2c/ov5693.c
@@ -26,6 +26,7 @@
 #include <media/v4l2-cci.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
 #include <media/v4l2-fwnode.h>
 
 /* System Control */
@@ -1095,7 +1096,13 @@ static const struct v4l2_subdev_pad_ops ov5693_pad_ops = {
 	.get_frame_interval = ov5693_get_frame_interval,
 };
 
+static const struct v4l2_subdev_core_ops ov5693_core_ops = {
+	.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
 static const struct v4l2_subdev_ops ov5693_ops = {
+	.core = &ov5693_core_ops,
 	.video = &ov5693_video_ops,
 	.pad = &ov5693_pad_ops,
 };
@@ -1336,7 +1343,8 @@ static int ov5693_probe(struct i2c_client *client)
 		return dev_err_probe(&client->dev, ret,
 				     "Error fetching regulators\n");
 
-	ov5693->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	ov5693->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
+			     V4L2_SUBDEV_FL_HAS_EVENTS;
 	ov5693->pad.flags = MEDIA_PAD_FL_SOURCE;
 	ov5693->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
 

base-commit: d7e7bca7169873b46e857c025c10f3336c1258d8
-- 
2.53.0