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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-09-23 GuEe-GUI first version
*/
#include "rockchip-display.h"
#define DBG_TAG "display.route"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
static const char *display_route_node_name(struct rt_ofw_node *np)
{
return np ? rt_ofw_node_full_name(np) : "<no-node>";
}
static struct rt_ofw_node *display_graph_remote(struct rt_ofw_node *ep_np)
{
return rt_ofw_parse_phandle(ep_np, "remote-endpoint", 0);
}
static struct rt_ofw_node *display_graph_device_from_ep(struct rt_ofw_node *ep_np,
struct rt_ofw_node **out_port_np)
{
struct rt_ofw_node *port_np, *dev_np;
port_np = rt_ofw_get_parent(ep_np);
if (out_port_np)
{
*out_port_np = port_np;
}
if (!port_np)
{
return RT_NULL;
}
dev_np = rt_ofw_get_parent(port_np);
if (dev_np && rt_ofw_node_tag_equ(dev_np, "ports"))
{
dev_np = rt_ofw_get_parent(dev_np);
}
return dev_np;
}
static struct rt_ofw_node *display_graph_find_sink(struct rt_ofw_node *connector_np,
struct rt_ofw_node *source_np)
{
struct rt_ofw_node *child, *ports_np = RT_NULL;
struct rt_ofw_node *port_np, *ep_np, *remote_ep, *sink_np;
if (!connector_np)
{
return RT_NULL;
}
/* A DSI panel is commonly represented as a direct child of the host. */
rt_ofw_foreach_available_child_node(connector_np, child)
{
if (rt_ofw_node_is_compatible(child, "simple-panel-dsi") ||
rt_ofw_node_is_compatible(child, "simple-panel") ||
rt_ofw_node_is_compatible(child, "rockchip,panel-simple"))
{
return child;
}
if (rt_ofw_node_tag_equ(child, "ports"))
{
ports_np = child;
}
}
if (!ports_np)
{
return RT_NULL;
}
rt_ofw_foreach_available_child_node(ports_np, port_np)
{
rt_ofw_foreach_available_child_node(port_np, ep_np)
{
remote_ep = display_graph_remote(ep_np);
if (!remote_ep)
{
continue;
}
sink_np = display_graph_device_from_ep(remote_ep, RT_NULL);
if (sink_np && sink_np != source_np && sink_np != connector_np)
{
rt_ofw_node_put(remote_ep);
return sink_np;
}
rt_ofw_node_put(remote_ep);
}
}
return RT_NULL;
}
rt_err_t display_route_get_vp_id(struct rt_ofw_node *vp_port_np, rt_uint32_t *vp_id)
{
rt_uint32_t reg;
if (!vp_port_np || !vp_id)
{
return -RT_EINVAL;
}
if (!rt_ofw_prop_read_u32(vp_port_np, "reg", ®))
{
*vp_id = reg;
return RT_EOK;
}
*vp_id = 0;
return RT_EOK;
}
rt_err_t display_route_resolve(struct rt_ofw_node *route_np, struct display_route *route)
{
struct rt_ofw_node *ep_np, *port_np, *remote_ep, *remote_port;
const char *route_name = display_route_node_name(route_np);
if (!route_np || !route)
{
return -RT_EINVAL;
}
rt_memset(route, 0, sizeof(*route));
route->route_np = route_np;
ep_np = rt_ofw_parse_phandle(route_np, "connect", 0);
if (!ep_np)
{
LOG_W("route %s: missing connect phandle", route_name);
return -RT_EINVAL;
}
route->vop_np = display_graph_device_from_ep(ep_np, &port_np);
if (!port_np)
{
LOG_W("route %s: endpoint %s has no port parent",
route_name, display_route_node_name(ep_np));
return -RT_ENOENT;
}
route->vp_port_np = port_np;
if (!route->vop_np)
{
LOG_W("route %s: failed to resolve vop node", route_name);
return -RT_ENOENT;
}
display_route_get_vp_id(route->vp_port_np, &route->vp_id);
remote_ep = display_graph_remote(ep_np);
if (!remote_ep)
{
LOG_W("route %s: endpoint %s missing remote-endpoint",
route_name, display_route_node_name(ep_np));
return -RT_ENOENT;
}
route->connector_np = display_graph_device_from_ep(remote_ep, &remote_port);
if (!remote_port)
{
LOG_W("route %s: remote endpoint %s has no port parent",
route_name, display_route_node_name(remote_ep));
return -RT_ENOENT;
}
if (!route->connector_np)
{
LOG_W("route %s: remote port %s has no connector parent",
route_name, display_route_node_name(remote_port));
return -RT_ENOENT;
}
route->panel_np = display_graph_find_sink(route->connector_np, route->vop_np);
LOG_D("route %s: resolved vop=%s vp%u connector=%s panel=%s",
route_name, display_route_node_name(route->vop_np), route->vp_id,
display_route_node_name(route->connector_np),
display_route_node_name(route->panel_np));
return RT_EOK;
}
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