linux-kernel - [PATCH 1/2] media: rcar-csi2: Fix registering camera endpoint to VIN

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Date:   Fri, 28 Feb 2020 16:50:10 +0000
From:   Lad Prabhakar <prabhakar.csengg@...il.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Niklas <niklas.soderlund@...natech.se>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH 1/2] media: rcar-csi2: Fix registering camera endpoint to VIN

CSI2 registers camera/sensor as v4l2 async sub device with fwnode is
remote endpoint and the camera/sensor register itself as v4l2 sub device
with fwnode is remote device as a result the match.fwnode should be
fwnode_graph_get_remote_port_parent and not
fwnode_graph_get_remote_endpoint.

This patch makes use of v4l2 helper function
v4l2_async_notifier_add_fwnode_remote_subdev() which uses
fwnode_graph_get_remote_port_parent as match.fwnode fixing the issue
of registering camera endpoint to the driver.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 drivers/media/platform/rcar-vin/rcar-csi2.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/rcar-vin/rcar-csi2.c b/drivers/media/platform/rcar-vin/rcar-csi2.c
index faa9fb23a2e9..5b04e4768eb1 100644
--- a/drivers/media/platform/rcar-vin/rcar-csi2.c
+++ b/drivers/media/platform/rcar-vin/rcar-csi2.c
@@ -833,20 +833,18 @@ static int rcsi2_parse_dt(struct rcar_csi2 *priv)
 		return ret;
 	}
 
-	priv->asd.match.fwnode =
-		fwnode_graph_get_remote_endpoint(of_fwnode_handle(ep));
-	priv->asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
-
-	of_node_put(ep);
-
 	v4l2_async_notifier_init(&priv->notifier);
 
-	ret = v4l2_async_notifier_add_subdev(&priv->notifier, &priv->asd);
+	ret = v4l2_async_notifier_add_fwnode_remote_subdev(&priv->notifier,
+							   of_fwnode_handle(ep),
+							   &priv->asd);
 	if (ret) {
-		fwnode_handle_put(priv->asd.match.fwnode);
+		of_node_put(ep);
 		return ret;
 	}
 
+	of_node_put(ep);
+
 	priv->notifier.ops = &rcar_csi2_notify_ops;
 
 	dev_dbg(priv->dev, "Found '%pOF'\n",
-- 
2.20.1