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media: imx: csi: Implement get_fwnode_pad op

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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>
This commit is contained in:
Steve Longerbeam 2020-05-01 19:15:41 +02:00 committed by Mauro Carvalho Chehab
parent acee6033c5
commit 596e5c5801
1 changed files with 23 additions and 0 deletions
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23
drivers/staging/media/imx/imx-media-csi.c
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@ -1832,9 +1832,32 @@ static void csi_unregistered(struct v4l2_subdev *sd)
ipu_csi_put(priv->csi);
}
/*
* The CSI has only one fwnode endpoint, at the sink pad. Verify the
* endpoint belongs to us, and return CSI_SINK_PAD.
*/
static int csi_get_fwnode_pad(struct media_entity *entity,
struct fwnode_endpoint *endpoint)
{
struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
struct csi_priv *priv = v4l2_get_subdevdata(sd);
struct fwnode_handle *csi_port = dev_fwnode(priv->dev);
struct fwnode_handle *csi_ep;
int ret;
csi_ep = fwnode_get_next_child_node(csi_port, NULL);
ret = endpoint->local_fwnode == csi_ep ? CSI_SINK_PAD : -ENXIO;
fwnode_handle_put(csi_ep);
return ret;
}
static const struct media_entity_operations csi_entity_ops = {
.link_setup = csi_link_setup,
.link_validate = v4l2_subdev_link_validate,
.get_fwnode_pad = csi_get_fwnode_pad,
};
static const struct v4l2_subdev_core_ops csi_core_ops = {