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/*
* OMAP Display Subsystem Base
*
* Copyright (C) 2015-2017 Texas Instruments Incorporated - http://www.ti.com/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/list.h>
#include "dss.h"
#include "omapdss.h"
static struct dss_device *dss_device;
static struct list_head omapdss_comp_list;
struct omapdss_comp_node {
struct list_head list;
struct device_node *node;
bool dss_core_component;
};
struct dss_device *omapdss_get_dss(void)
{
return dss_device;
}
EXPORT_SYMBOL(omapdss_get_dss);
void omapdss_set_dss(struct dss_device *dss)
{
dss_device = dss;
}
EXPORT_SYMBOL(omapdss_set_dss);
struct dispc_device *dispc_get_dispc(struct dss_device *dss)
{
return dss->dispc;
}
EXPORT_SYMBOL(dispc_get_dispc);
const struct dispc_ops *dispc_get_ops(struct dss_device *dss)
{
return dss->dispc_ops;
}
EXPORT_SYMBOL(dispc_get_ops);
static bool omapdss_list_contains(const struct device_node *node)
{
struct omapdss_comp_node *comp;
list_for_each_entry(comp, &omapdss_comp_list, list) {
if (comp->node == node)
return true;
}
return false;
}
static void omapdss_walk_device(struct device *dev, struct device_node *node,
bool dss_core)
{
struct device_node *n;
struct omapdss_comp_node *comp = devm_kzalloc(dev, sizeof(*comp),
GFP_KERNEL);
if (comp) {
comp->node = node;
comp->dss_core_component = dss_core;
list_add(&comp->list, &omapdss_comp_list);
}
/*
* of_graph_get_remote_port_parent() prints an error if there is no
* port/ports node. To avoid that, check first that there's the node.
*/
n = of_get_child_by_name(node, "ports");
if (!n)
n = of_get_child_by_name(node, "port");
if (!n)
return;
of_node_put(n);
n = NULL;
while ((n = of_graph_get_next_endpoint(node, n)) != NULL) {
struct device_node *pn = of_graph_get_remote_port_parent(n);
if (!pn)
continue;
if (!of_device_is_available(pn) || omapdss_list_contains(pn)) {
of_node_put(pn);
continue;
}
omapdss_walk_device(dev, pn, false);
}
}
void omapdss_gather_components(struct device *dev)
{
struct device_node *child;
INIT_LIST_HEAD(&omapdss_comp_list);
omapdss_walk_device(dev, dev->of_node, true);
for_each_available_child_of_node(dev->of_node, child) {
if (!of_find_property(child, "compatible", NULL))
continue;
omapdss_walk_device(dev, child, true);
}
}
EXPORT_SYMBOL(omapdss_gather_components);
static bool omapdss_component_is_loaded(struct omapdss_comp_node *comp)
{
if (comp->dss_core_component)
return true;
if (omapdss_component_is_display(comp->node))
return true;
if (omapdss_component_is_output(comp->node))
return true;
return false;
}
bool omapdss_stack_is_ready(void)
{
struct omapdss_comp_node *comp;
list_for_each_entry(comp, &omapdss_comp_list, list) {
if (!omapdss_component_is_loaded(comp))
return false;
}
return true;
}
EXPORT_SYMBOL(omapdss_stack_is_ready);
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
MODULE_DESCRIPTION("OMAP Display Subsystem Base");
MODULE_LICENSE("GPL v2");
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