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Subject: media: imx: csi: Implement get_fwnode_pad op Author: Steve Longerbeam <[email protected]> Date: Fri May 1 19:15:41 2020 +0200 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 <[email protected]> Reviewed-by: Laurent Pinchart <[email protected]> Signed-off-by: Sakari Ailus <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> drivers/staging/media/imx/imx-media-csi.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) --- diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c index 905b1ee27db6..08f698af4797 100644 --- a/drivers/staging/media/imx/imx-media-csi.c +++ b/drivers/staging/media/imx/imx-media-csi.c @@ -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 = { _______________________________________________ linuxtv-commits mailing list [email protected] https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
