media: v4l: async: Support fwnode endpoint list matching for subdevs

Support matching V4L2 async sub-devices based on particular fwnode
endpoint. This makes it possible to instantiate multiple V4L2 sub-devices
based on given fwnode endpoints from a single device, based on driver
needs.

Signed-off-by: Sakari Ailus <[email protected]>
Tested-by: Philipp Zabel <[email protected]> # imx6qp
Tested-by: Niklas Söderlund <[email protected]> # rcar + adv746x
Tested-by: Aishwarya Kothari <[email protected]> # Apalis i.MX6Q with TC358743
Tested-by: Lad Prabhakar <[email protected]> # Renesas RZ/G2L SMARC
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 2ec179cd1264..217b8019fb9b 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -1467,8 +1467,20 @@ EXPORT_SYMBOL_GPL(__v4l2_subdev_init_finalize);
 
 void v4l2_subdev_cleanup(struct v4l2_subdev *sd)
 {
+	struct v4l2_async_subdev_endpoint *ase, *ase_tmp;
+
 	__v4l2_subdev_state_free(sd->active_state);
 	sd->active_state = NULL;
+
+	if (list_empty(&sd->async_subdev_endpoint_list))
+		return;
+
+	list_for_each_entry_safe(ase, ase_tmp, &sd->async_subdev_endpoint_list,
+				 async_subdev_endpoint_entry) {
+		list_del(&ase->async_subdev_endpoint_entry);
+
+		kfree(ase);
+	}
 }
 EXPORT_SYMBOL_GPL(v4l2_subdev_cleanup);
 
@@ -2182,6 +2194,7 @@ void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
 	sd->dev_priv = NULL;
 	sd->host_priv = NULL;
 	sd->privacy_led = NULL;
+	INIT_LIST_HEAD(&sd->async_subdev_endpoint_list);
 #if defined(CONFIG_MEDIA_CONTROLLER)
 	sd->entity.name = sd->name;
 	sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV;