/**
* 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;
}
