Commit 596e5c58 authored by Steve Longerbeam's avatar Steve Longerbeam Committed by Mauro Carvalho Chehab
Browse files

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: default avatarSteve Longerbeam <slongerbeam@gmail.com>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent acee6033

drivers/staging/media/imx/imx-media-csi.c

+23 −0
Original line number Diff line number Diff line
@@ -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 = {