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// SPDX-License-Identifier: GPL-2.0-only
/*
* Hisilicon Kirin SoCs drm master driver
*
* Copyright (c) 2016 Linaro Limited.
* Copyright (c) 2014-2016 Hisilicon Limited.
*
* Author:
* Xinliang Liu <z.liuxinliang@hisilicon.com>
* Xinliang Liu <xinliang.liu@linaro.org>
* Xinwei Kong <kong.kongxinwei@hisilicon.com>
*/
#include <linux/of_platform.h>
#include <linux/component.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_of.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "kirin_drm_drv.h"
static struct kirin_drm_data *driver_data;
static int kirin_drm_kms_cleanup(struct drm_device *dev)
{
drm_kms_helper_poll_fini(dev);
driver_data->cleanup(to_platform_device(dev->dev));
drm_mode_config_cleanup(dev);
return 0;
}
static int kirin_drm_kms_init(struct drm_device *dev)
{
int ret;
dev_set_drvdata(dev->dev, dev);
/* dev->mode_config initialization */
drm_mode_config_init(dev);
dev->mode_config.min_width = 0;
dev->mode_config.min_height = 0;
dev->mode_config.max_width = driver_data->config_max_width;
dev->mode_config.max_height = driver_data->config_max_width;
dev->mode_config.funcs = driver_data->mode_config_funcs;
/* display controller init */
ret = driver_data->init(to_platform_device(dev->dev));
if (ret)
goto err_mode_config_cleanup;
/* bind and init sub drivers */
ret = component_bind_all(dev->dev, dev);
if (ret) {
DRM_ERROR("failed to bind all component.\n");
goto err_dc_cleanup;
}
/* vblank init */
ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
if (ret) {
DRM_ERROR("failed to initialize vblank.\n");
goto err_unbind_all;
}
/* with irq_enabled = true, we can use the vblank feature. */
dev->irq_enabled = true;
/* reset all the states of crtc/plane/encoder/connector */
drm_mode_config_reset(dev);
/* init kms poll for handling hpd */
drm_kms_helper_poll_init(dev);
return 0;
err_unbind_all:
component_unbind_all(dev->dev, dev);
err_dc_cleanup:
driver_data->cleanup(to_platform_device(dev->dev));
err_mode_config_cleanup:
drm_mode_config_cleanup(dev);
return ret;
}
static int compare_of(struct device *dev, void *data)
{
return dev->of_node == data;
}
static int kirin_drm_bind(struct device *dev)
{
struct drm_device *drm_dev;
int ret;
drm_dev = drm_dev_alloc(driver_data->driver, dev);
if (IS_ERR(drm_dev))
return PTR_ERR(drm_dev);
ret = kirin_drm_kms_init(drm_dev);
if (ret)
goto err_drm_dev_put;
ret = drm_dev_register(drm_dev, 0);
if (ret)
goto err_kms_cleanup;
drm_fbdev_generic_setup(drm_dev, 32);
return 0;
err_kms_cleanup:
kirin_drm_kms_cleanup(drm_dev);
err_drm_dev_put:
drm_dev_put(drm_dev);
return ret;
}
static void kirin_drm_unbind(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
drm_dev_unregister(drm_dev);
kirin_drm_kms_cleanup(drm_dev);
drm_dev_put(drm_dev);
}
static const struct component_master_ops kirin_drm_ops = {
.bind = kirin_drm_bind,
.unbind = kirin_drm_unbind,
};
static int kirin_drm_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct component_match *match = NULL;
struct device_node *remote;
driver_data = (struct kirin_drm_data *)of_device_get_match_data(dev);
if (!driver_data) {
DRM_ERROR("failed to get dt id data\n");
return -EINVAL;
}
remote = of_graph_get_remote_node(np, 0, 0);
if (!remote)
return -ENODEV;
drm_of_component_match_add(dev, &match, compare_of, remote);
of_node_put(remote);
return component_master_add_with_match(dev, &kirin_drm_ops, match);
}
static int kirin_drm_platform_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &kirin_drm_ops);
driver_data = NULL;
return 0;
}
static const struct of_device_id kirin_drm_dt_ids[] = {
{ .compatible = "hisilicon,hi6220-ade",
.data = &ade_driver_data,
},
{ /* end node */ },
};
MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
static struct platform_driver kirin_drm_platform_driver = {
.probe = kirin_drm_platform_probe,
.remove = kirin_drm_platform_remove,
.driver = {
.name = "kirin-drm",
.of_match_table = kirin_drm_dt_ids,
},
};
module_platform_driver(kirin_drm_platform_driver);
MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
MODULE_LICENSE("GPL v2");
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