mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-20 16:29:33 +07:00
1e08c82268
When omapdss is loaded (all core components are in place) create a list of devices used in the display graph. This list later can be used by omapdrm via the omapdss_stack_is_ready() function to check that these components are loaded. Based on this information, omapdrm can defer probe in case when the omapdss stack is not ready yet. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
141 lines
2.9 KiB
C
141 lines
2.9 KiB
C
#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_graph.h>
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#include <linux/list.h>
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#include "omapdss.h"
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static bool dss_initialized;
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static const struct dispc_ops *ops;
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static struct list_head omapdss_comp_list;
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struct omapdss_comp_node {
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struct list_head list;
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struct device_node *node;
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bool dss_core_component;
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};
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void omapdss_set_is_initialized(bool set)
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{
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dss_initialized = set;
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}
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EXPORT_SYMBOL(omapdss_set_is_initialized);
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bool omapdss_is_initialized(void)
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{
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return dss_initialized;
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}
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EXPORT_SYMBOL(omapdss_is_initialized);
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void dispc_set_ops(const struct dispc_ops *o)
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{
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ops = o;
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}
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EXPORT_SYMBOL(dispc_set_ops);
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const struct dispc_ops *dispc_get_ops(void)
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{
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return ops;
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}
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EXPORT_SYMBOL(dispc_get_ops);
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static bool omapdss_list_contains(const struct device_node *node)
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{
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struct omapdss_comp_node *comp;
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list_for_each_entry(comp, &omapdss_comp_list, list) {
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if (comp->node == node)
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return true;
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}
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return false;
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}
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static void omapdss_walk_device(struct device *dev, struct device_node *node,
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bool dss_core)
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{
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struct device_node *n;
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struct omapdss_comp_node *comp = devm_kzalloc(dev, sizeof(*comp),
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GFP_KERNEL);
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if (comp) {
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comp->node = node;
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comp->dss_core_component = dss_core;
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list_add(&comp->list, &omapdss_comp_list);
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}
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/*
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* of_graph_get_remote_port_parent() prints an error if there is no
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* port/ports node. To avoid that, check first that there's the node.
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*/
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n = of_get_child_by_name(node, "ports");
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if (!n)
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n = of_get_child_by_name(node, "port");
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if (!n)
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return;
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of_node_put(n);
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n = NULL;
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while ((n = of_graph_get_next_endpoint(node, n)) != NULL) {
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struct device_node *pn = of_graph_get_remote_port_parent(n);
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if (!pn)
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continue;
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if (!of_device_is_available(pn) || omapdss_list_contains(pn)) {
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of_node_put(pn);
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continue;
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}
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omapdss_walk_device(dev, pn, false);
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}
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}
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void omapdss_gather_components(struct device *dev)
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{
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struct device_node *child;
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INIT_LIST_HEAD(&omapdss_comp_list);
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omapdss_walk_device(dev, dev->of_node, true);
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for_each_available_child_of_node(dev->of_node, child) {
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if (!of_find_property(child, "compatible", NULL))
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continue;
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omapdss_walk_device(dev, child, true);
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}
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}
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EXPORT_SYMBOL(omapdss_gather_components);
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static bool omapdss_component_is_loaded(struct omapdss_comp_node *comp)
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{
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if (comp->dss_core_component)
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return true;
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if (omapdss_component_is_display(comp->node))
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return true;
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if (omapdss_component_is_output(comp->node))
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return true;
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return false;
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}
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bool omapdss_stack_is_ready(void)
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{
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struct omapdss_comp_node *comp;
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list_for_each_entry(comp, &omapdss_comp_list, list) {
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if (!omapdss_component_is_loaded(comp))
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return false;
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}
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return true;
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}
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EXPORT_SYMBOL(omapdss_stack_is_ready);
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MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
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MODULE_DESCRIPTION("OMAP Display Subsystem Base");
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MODULE_LICENSE("GPL v2");
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