C++ (Cpp) v4l2_fwnode_endpoint_parse Examples

Example #1

File: rcar-core.c Project: mdamt/linux

static int rvin_digitial_parse_v4l2(struct rvin_dev *vin,
				    struct device_node *ep,
				    struct v4l2_mbus_config *mbus_cfg)
{
	struct v4l2_fwnode_endpoint v4l2_ep;
	int ret;

	ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &v4l2_ep);
	if (ret) {
		vin_err(vin, "Could not parse v4l2 endpoint\n");
		return -EINVAL;
	}

	mbus_cfg->type = v4l2_ep.bus_type;

	switch (mbus_cfg->type) {
	case V4L2_MBUS_PARALLEL:
		vin_dbg(vin, "Found PARALLEL media bus\n");
		mbus_cfg->flags = v4l2_ep.bus.parallel.flags;
		break;
	case V4L2_MBUS_BT656:
		vin_dbg(vin, "Found BT656 media bus\n");
		mbus_cfg->flags = 0;
		break;
	default:
		vin_err(vin, "Unknown media bus type\n");
		return -EINVAL;
	}

	return 0;
}

Example #2

File: imx7-media-csi.c Project: grate-driver/linux

static int imx7_csi_get_upstream_endpoint(struct imx7_csi *csi,
					  struct v4l2_fwnode_endpoint *ep,
					  bool skip_mux)
{
	struct device_node *endpoint, *port;
	struct media_entity *src;
	struct v4l2_subdev *sd;
	struct media_pad *pad;

	if (!csi->src_sd)
		return -EPIPE;

	src = &csi->src_sd->entity;

skip_video_mux:
	/* get source pad of entity directly upstream from src */
	pad = imx_media_pipeline_pad(src, 0, 0, true);
	if (IS_ERR(pad))
		return PTR_ERR(pad);

	sd = media_entity_to_v4l2_subdev(pad->entity);

	/* To get bus type we may need to skip video mux */
	if (skip_mux && src->function == MEDIA_ENT_F_VID_MUX) {
		src = &sd->entity;
		goto skip_video_mux;
	}

	/*
	 * NOTE: this assumes an OF-graph port id is the same as a
	 * media pad index.
	 */
	port = of_graph_get_port_by_id(sd->dev->of_node, pad->index);
	if (!port)
		return -ENODEV;

	endpoint = of_get_next_child(port, NULL);
	of_node_put(port);
	if (!endpoint)
		return -ENODEV;

	v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint), ep);
	of_node_put(endpoint);

	return 0;
}