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media: imx: csi: Implement get_fwnode_pad op
The CSI does not have a 1:1 relationship between fwnode port numbers and pad indexes. In fact the CSI fwnode device is itself a port which is the sink, containing only a single fwnode endpoint. Implement media_entity operation get_fwnode_pad to first verify the given endpoint is the CSI's sink endpoint, and if so return the CSI sink pad index. Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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1 changed files with 23 additions and 0 deletions
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@ -1832,9 +1832,32 @@ static void csi_unregistered(struct v4l2_subdev *sd)
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ipu_csi_put(priv->csi);
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}
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/*
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* The CSI has only one fwnode endpoint, at the sink pad. Verify the
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* endpoint belongs to us, and return CSI_SINK_PAD.
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*/
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static int csi_get_fwnode_pad(struct media_entity *entity,
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struct fwnode_endpoint *endpoint)
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{
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struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
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struct csi_priv *priv = v4l2_get_subdevdata(sd);
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struct fwnode_handle *csi_port = dev_fwnode(priv->dev);
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struct fwnode_handle *csi_ep;
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int ret;
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csi_ep = fwnode_get_next_child_node(csi_port, NULL);
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ret = endpoint->local_fwnode == csi_ep ? CSI_SINK_PAD : -ENXIO;
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fwnode_handle_put(csi_ep);
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return ret;
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}
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static const struct media_entity_operations csi_entity_ops = {
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.link_setup = csi_link_setup,
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.link_validate = v4l2_subdev_link_validate,
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.get_fwnode_pad = csi_get_fwnode_pad,
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};
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static const struct v4l2_subdev_core_ops csi_core_ops = {
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