media: imx: csi: Create media links in bound notifier

Implement a notifier bound op to register media links from the remote
sub-device's source pad(s) to the CSI sink pad.

Signed-off-by: Steve Longerbeam <slongerbeam@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/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c
index 08f698a..a051a06 100644 (file)
--- a/drivers/staging/media/imx/imx-media-csi.c
+++ b/drivers/staging/media/imx/imx-media-csi.c
@@ -120,6 +120,11 @@ static inline struct csi_priv *sd_to_dev(struct v4l2_subdev *sdev)
        return container_of(sdev, struct csi_priv, sd);
 }
 
+static inline struct csi_priv *notifier_to_dev(struct v4l2_async_notifier *n)
+{
+       return container_of(n, struct csi_priv, notifier);
+}
+
 static inline bool is_parallel_bus(struct v4l2_fwnode_endpoint *ep)
 {
        return ep->bus_type != V4L2_MBUS_CSI2_DPHY;
@@ -1894,6 +1899,20 @@ static const struct v4l2_subdev_internal_ops csi_internal_ops = {
        .unregistered = csi_unregistered,
 };
 
+static int imx_csi_notify_bound(struct v4l2_async_notifier *notifier,
+                               struct v4l2_subdev *sd,
+                               struct v4l2_async_subdev *asd)
+{
+       struct csi_priv *priv = notifier_to_dev(notifier);
+       struct media_pad *sink = &priv->sd.entity.pads[CSI_SINK_PAD];
+
+       return v4l2_create_fwnode_links_to_pad(sd, sink);
+}
+
+static const struct v4l2_async_notifier_operations csi_notify_ops = {
+       .bound = imx_csi_notify_bound,
+};
+
 static int imx_csi_async_register(struct csi_priv *priv)
 {
        struct v4l2_async_subdev *asd = NULL;
@@ -1931,6 +1950,8 @@ static int imx_csi_async_register(struct csi_priv *priv)
                }
        }
 
+       priv->notifier.ops = &csi_notify_ops;
+
        ret = v4l2_async_subdev_notifier_register(&priv->sd,
                                                  &priv->notifier);
        if (ret)