/** * drm_of_find_possible_crtcs - find the possible CRTCs for an encoder port * @dev: DRM device * @port: encoder port to scan for endpoints * * Scan all endpoints attached to a port, locate their attached CRTCs, * and generate the DRM mask of CRTCs which may be attached to this * encoder. * * See Documentation/devicetree/bindings/graph.txt for the bindings. */ uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, struct device_node *port) { struct device_node *remote_port, *ep; uint32_t possible_crtcs = 0; for_each_endpoint_of_node(port, ep) { remote_port = of_graph_get_remote_port(ep); if (!remote_port) { of_node_put(ep); return 0; } possible_crtcs |= drm_of_crtc_port_mask(dev, remote_port); of_node_put(remote_port); }
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; }
struct coresight_platform_data *of_get_coresight_platform_data( struct device *dev, struct device_node *node) { int i = 0, ret = 0, cpu; struct coresight_platform_data *pdata; struct of_endpoint endpoint, rendpoint; struct device *rdev; struct device_node *dn; struct device_node *ep = NULL; struct device_node *rparent = NULL; struct device_node *rport = NULL; pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return ERR_PTR(-ENOMEM); /* Use device name as sysfs handle */ pdata->name = dev_name(dev); /* Get the number of input and output port for this component */ of_coresight_get_ports(node, &pdata->nr_inport, &pdata->nr_outport); if (pdata->nr_outport) { ret = of_coresight_alloc_memory(dev, pdata); if (ret) return ERR_PTR(ret); /* Iterate through each port to discover topology */ do { /* Get a handle on a port */ ep = of_graph_get_next_endpoint(node, ep); if (!ep) break; /* * No need to deal with input ports, processing for as * processing for output ports will deal with them. */ if (of_find_property(ep, "slave-mode", NULL)) continue; /* Get a handle on the local endpoint */ ret = of_graph_parse_endpoint(ep, &endpoint); if (ret) continue; /* The local out port number */ pdata->outports[i] = endpoint.id; /* * Get a handle on the remote port and parent * attached to it. */ rparent = of_graph_get_remote_port_parent(ep); rport = of_graph_get_remote_port(ep); if (!rparent || !rport) continue; if (of_graph_parse_endpoint(rport, &rendpoint)) continue; rdev = of_coresight_get_endpoint_device(rparent); if (!rdev) continue; pdata->child_names[i] = dev_name(rdev); pdata->child_ports[i] = rendpoint.id; i++; } while (ep); } /* Affinity defaults to CPU0 */ pdata->cpu = 0; dn = of_parse_phandle(node, "cpu", 0); for (cpu = 0; dn && cpu < nr_cpu_ids; cpu++) { if (dn == of_get_cpu_node(cpu, NULL)) { pdata->cpu = cpu; break; } } return pdata; }