static int rvin_digital_graph_parse(struct rvin_dev *vin)
{
struct device_node *ep, *np;
int ret;
vin->digital.asd.match.fwnode.fwnode = NULL;
vin->digital.subdev = NULL;
/*
* Port 0 id 0 is local digital input, try to get it.
* Not all instances can or will have this, that is OK
*/
ep = of_graph_get_endpoint_by_regs(vin->dev->of_node, 0, 0);
if (!ep)
return 0;
np = of_graph_get_remote_port_parent(ep);
if (!np) {
vin_err(vin, "No remote parent for digital input\n");
of_node_put(ep);
return -EINVAL;
}
of_node_put(np);
ret = rvin_digitial_parse_v4l2(vin, ep, &vin->digital.mbus_cfg);
of_node_put(ep);
if (ret)
return ret;
vin->digital.asd.match.fwnode.fwnode = of_fwnode_handle(np);
vin->digital.asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
return 0;
}
static bool meson_hdmi_connector_is_available(struct device *dev)
{
struct device_node *ep, *remote;
/* HDMI Connector is on the second port, first endpoint */
ep = of_graph_get_endpoint_by_regs(dev->of_node, 1, 0);
if (!ep)
return false;
/* If the endpoint node exists, consider it enabled */
remote = of_graph_get_remote_port(ep);
if (remote) {
of_node_put(ep);
return true;
}
of_node_put(ep);
of_node_put(remote);
return false;
}
static int rcar_lvds_parse_dt(struct rcar_lvds *lvds)
{
struct device_node *local_output = NULL;
struct device_node *remote_input = NULL;
struct device_node *remote = NULL;
struct device_node *node;
bool is_bridge = false;
int ret = 0;
local_output = of_graph_get_endpoint_by_regs(lvds->dev->of_node, 1, 0);
if (!local_output) {
dev_dbg(lvds->dev, "unconnected port@1\n");
return -ENODEV;
}
/*
* Locate the connected entity and infer its type from the number of
* endpoints.
*/
remote = of_graph_get_remote_port_parent(local_output);
if (!remote) {
dev_dbg(lvds->dev, "unconnected endpoint %pOF\n", local_output);
ret = -ENODEV;
goto done;
}
if (!of_device_is_available(remote)) {
dev_dbg(lvds->dev, "connected entity %pOF is disabled\n",
remote);
ret = -ENODEV;
goto done;
}
remote_input = of_graph_get_remote_endpoint(local_output);
for_each_endpoint_of_node(remote, node) {
if (node != remote_input) {
/*
* We've found one endpoint other than the input, this
* must be a bridge.
*/
is_bridge = true;
of_node_put(node);
break;
}
}
if (is_bridge) {
lvds->next_bridge = of_drm_find_bridge(remote);
if (!lvds->next_bridge)
ret = -EPROBE_DEFER;
} else {
lvds->panel = of_drm_find_panel(remote);
if (!lvds->panel)
ret = -EPROBE_DEFER;
}
done:
of_node_put(local_output);
of_node_put(remote_input);
of_node_put(remote);
return ret;
}
