diff options
| author | Steve Longerbeam <slongerbeam@gmail.com> | 2020-05-01 19:15:41 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-05-18 14:18:11 +0200 |
| commit | 596e5c5801cd97d3528b30447e23578656eba10b (patch) | |
| tree | 1e7b1fd80ecb54a836ac2e0954e4778c68bd9534 | |
| parent | acee6033c5c5b7758b521ea63bb9f989578aa9fd (diff) | |
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>
| -rw-r--r-- | drivers/staging/media/imx/imx-media-csi.c | 23 |
1 files changed, 23 insertions, 0 deletions
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 = { |