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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020 Unisoc Inc.
*/
#include <linux/component.h>
#include <linux/dma-mapping.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/mutex.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_gem_dma_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 "sprd_drm.h"
#define DRIVER_NAME "sprd"
#define DRIVER_DESC "Spreadtrum SoCs' DRM Driver"
#define DRIVER_DATE "20200201"
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
static const struct drm_mode_config_helper_funcs sprd_drm_mode_config_helper = {
.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
};
static const struct drm_mode_config_funcs sprd_drm_mode_config_funcs = {
.fb_create = drm_gem_fb_create,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
static void sprd_drm_mode_config_init(struct drm_device *drm)
{
drm->mode_config.min_width = 0;
drm->mode_config.min_height = 0;
drm->mode_config.max_width = 8192;
drm->mode_config.max_height = 8192;
drm->mode_config.funcs = &sprd_drm_mode_config_funcs;
drm->mode_config.helper_private = &sprd_drm_mode_config_helper;
}
DEFINE_DRM_GEM_DMA_FOPS(sprd_drm_fops);
static struct drm_driver sprd_drm_drv = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
.fops = &sprd_drm_fops,
/* GEM Operations */
DRM_GEM_DMA_DRIVER_OPS,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
};
static int sprd_drm_bind(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm;
struct sprd_drm *sprd;
int ret;
sprd = devm_drm_dev_alloc(dev, &sprd_drm_drv, struct sprd_drm, drm);
if (IS_ERR(sprd))
return PTR_ERR(sprd);
drm = &sprd->drm;
platform_set_drvdata(pdev, drm);
ret = drmm_mode_config_init(drm);
if (ret)
return ret;
sprd_drm_mode_config_init(drm);
/* bind and init sub drivers */
ret = component_bind_all(drm->dev, drm);
if (ret) {
drm_err(drm, "failed to bind all component.\n");
return ret;
}
/* vblank init */
ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
if (ret) {
drm_err(drm, "failed to initialize vblank.\n");
goto err_unbind_all;
}
/* reset all the states of crtc/plane/encoder/connector */
drm_mode_config_reset(drm);
/* init kms poll for handling hpd */
drm_kms_helper_poll_init(drm);
ret = drm_dev_register(drm, 0);
if (ret < 0)
goto err_kms_helper_poll_fini;
return 0;
err_kms_helper_poll_fini:
drm_kms_helper_poll_fini(drm);
err_unbind_all:
component_unbind_all(drm->dev, drm);
return ret;
}
static void sprd_drm_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
drm_dev_unregister(drm);
drm_kms_helper_poll_fini(drm);
component_unbind_all(drm->dev, drm);
}
static const struct component_master_ops drm_component_ops = {
.bind = sprd_drm_bind,
.unbind = sprd_drm_unbind,
};
static int sprd_drm_probe(struct platform_device *pdev)
{
return drm_of_component_probe(&pdev->dev, component_compare_of, &drm_component_ops);
}
static void sprd_drm_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &drm_component_ops);
}
static void sprd_drm_shutdown(struct platform_device *pdev)
{
struct drm_device *drm = platform_get_drvdata(pdev);
if (!drm) {
dev_warn(&pdev->dev, "drm device is not available, no shutdown\n");
return;
}
drm_atomic_helper_shutdown(drm);
}
static const struct of_device_id drm_match_table[] = {
{ .compatible = "sprd,display-subsystem", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, drm_match_table);
static struct platform_driver sprd_drm_driver = {
.probe = sprd_drm_probe,
.remove = sprd_drm_remove,
.shutdown = sprd_drm_shutdown,
.driver = {
.name = "sprd-drm-drv",
.of_match_table = drm_match_table,
},
};
static struct platform_driver *sprd_drm_drivers[] = {
&sprd_drm_driver,
&sprd_dpu_driver,
&sprd_dsi_driver,
};
static int __init sprd_drm_init(void)
{
if (drm_firmware_drivers_only())
return -ENODEV;
return platform_register_drivers(sprd_drm_drivers,
ARRAY_SIZE(sprd_drm_drivers));
}
static void __exit sprd_drm_exit(void)
{
platform_unregister_drivers(sprd_drm_drivers,
ARRAY_SIZE(sprd_drm_drivers));
}
module_init(sprd_drm_init);
module_exit(sprd_drm_exit);
MODULE_AUTHOR("Leon He <leon.he@unisoc.com>");
MODULE_AUTHOR("Kevin Tang <kevin.tang@unisoc.com>");
MODULE_DESCRIPTION("Unisoc DRM KMS Master Driver");
MODULE_LICENSE("GPL v2");
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