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// SPDX-License-Identifier: GPL-2.0
/*
* (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
* Author: James.Qian.Wang <james.qian.wang@arm.com>
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/component.h>
#include <linux/pm_runtime.h>
#include <drm/drm_of.h>
#include "komeda_dev.h"
#include "komeda_kms.h"
struct komeda_drv {
struct komeda_dev *mdev;
struct komeda_kms_dev *kms;
};
struct komeda_dev *dev_to_mdev(struct device *dev)
{
struct komeda_drv *mdrv = dev_get_drvdata(dev);
return mdrv ? mdrv->mdev : NULL;
}
static void komeda_unbind(struct device *dev)
{
struct komeda_drv *mdrv = dev_get_drvdata(dev);
if (!mdrv)
return;
komeda_kms_detach(mdrv->kms);
if (pm_runtime_enabled(dev))
pm_runtime_disable(dev);
else
komeda_dev_suspend(mdrv->mdev);
komeda_dev_destroy(mdrv->mdev);
dev_set_drvdata(dev, NULL);
devm_kfree(dev, mdrv);
}
static int komeda_bind(struct device *dev)
{
struct komeda_drv *mdrv;
int err;
mdrv = devm_kzalloc(dev, sizeof(*mdrv), GFP_KERNEL);
if (!mdrv)
return -ENOMEM;
mdrv->mdev = komeda_dev_create(dev);
if (IS_ERR(mdrv->mdev)) {
err = PTR_ERR(mdrv->mdev);
goto free_mdrv;
}
pm_runtime_enable(dev);
if (!pm_runtime_enabled(dev))
komeda_dev_resume(mdrv->mdev);
mdrv->kms = komeda_kms_attach(mdrv->mdev);
if (IS_ERR(mdrv->kms)) {
err = PTR_ERR(mdrv->kms);
goto destroy_mdev;
}
dev_set_drvdata(dev, mdrv);
return 0;
destroy_mdev:
if (pm_runtime_enabled(dev))
pm_runtime_disable(dev);
else
komeda_dev_suspend(mdrv->mdev);
komeda_dev_destroy(mdrv->mdev);
free_mdrv:
devm_kfree(dev, mdrv);
return err;
}
static const struct component_master_ops komeda_master_ops = {
.bind = komeda_bind,
.unbind = komeda_unbind,
};
static int compare_of(struct device *dev, void *data)
{
return dev->of_node == data;
}
static void komeda_add_slave(struct device *master,
struct component_match **match,
struct device_node *np,
u32 port, u32 endpoint)
{
struct device_node *remote;
remote = of_graph_get_remote_node(np, port, endpoint);
if (remote) {
drm_of_component_match_add(master, match, compare_of, remote);
of_node_put(remote);
}
}
static int komeda_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct component_match *match = NULL;
struct device_node *child;
if (!dev->of_node)
return -ENODEV;
for_each_available_child_of_node(dev->of_node, child) {
if (of_node_cmp(child->name, "pipeline") != 0)
continue;
/* add connector */
komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 0);
komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 1);
}
return component_master_add_with_match(dev, &komeda_master_ops, match);
}
static int komeda_platform_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &komeda_master_ops);
return 0;
}
static const struct of_device_id komeda_of_match[] = {
{ .compatible = "arm,mali-d71", .data = d71_identify, },
{ .compatible = "arm,mali-d32", .data = d71_identify, },
{},
};
MODULE_DEVICE_TABLE(of, komeda_of_match);
static int komeda_rt_pm_suspend(struct device *dev)
{
struct komeda_drv *mdrv = dev_get_drvdata(dev);
return komeda_dev_suspend(mdrv->mdev);
}
static int komeda_rt_pm_resume(struct device *dev)
{
struct komeda_drv *mdrv = dev_get_drvdata(dev);
return komeda_dev_resume(mdrv->mdev);
}
static int __maybe_unused komeda_pm_suspend(struct device *dev)
{
struct komeda_drv *mdrv = dev_get_drvdata(dev);
int res;
res = drm_mode_config_helper_suspend(&mdrv->kms->base);
if (!pm_runtime_status_suspended(dev))
komeda_dev_suspend(mdrv->mdev);
return res;
}
static int __maybe_unused komeda_pm_resume(struct device *dev)
{
struct komeda_drv *mdrv = dev_get_drvdata(dev);
if (!pm_runtime_status_suspended(dev))
komeda_dev_resume(mdrv->mdev);
return drm_mode_config_helper_resume(&mdrv->kms->base);
}
static const struct dev_pm_ops komeda_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(komeda_pm_suspend, komeda_pm_resume)
SET_RUNTIME_PM_OPS(komeda_rt_pm_suspend, komeda_rt_pm_resume, NULL)
};
static struct platform_driver komeda_platform_driver = {
.probe = komeda_platform_probe,
.remove = komeda_platform_remove,
.driver = {
.name = "komeda",
.of_match_table = komeda_of_match,
.pm = &komeda_pm_ops,
},
};
module_platform_driver(komeda_platform_driver);
MODULE_AUTHOR("James.Qian.Wang <james.qian.wang@arm.com>");
MODULE_DESCRIPTION("Komeda KMS driver");
MODULE_LICENSE("GPL v2");
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