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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2016 Linaro Ltd.
* Copyright 2016 ZTE Corporation.
*/
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/spinlock.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.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 "zx_drm_drv.h"
#include "zx_vou.h"
static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
.fb_create = drm_gem_fb_create,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
static const struct drm_driver zx_drm_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
DRM_GEM_CMA_DRIVER_OPS,
.fops = &zx_drm_fops,
.name = "zx-vou",
.desc = "ZTE VOU Controller DRM",
.date = "20160811",
.major = 1,
.minor = 0,
};
static int zx_drm_bind(struct device *dev)
{
struct drm_device *drm;
int ret;
drm = drm_dev_alloc(&zx_drm_driver, dev);
if (IS_ERR(drm))
return PTR_ERR(drm);
dev_set_drvdata(dev, drm);
drm_mode_config_init(drm);
drm->mode_config.min_width = 16;
drm->mode_config.min_height = 16;
drm->mode_config.max_width = 4096;
drm->mode_config.max_height = 4096;
drm->mode_config.funcs = &zx_drm_mode_config_funcs;
ret = component_bind_all(dev, drm);
if (ret) {
DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
goto out_unregister;
}
ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
if (ret < 0) {
DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
goto out_unbind;
}
/*
* We will manage irq handler on our own. In this case, irq_enabled
* need to be true for using vblank core support.
*/
drm->irq_enabled = true;
drm_mode_config_reset(drm);
drm_kms_helper_poll_init(drm);
ret = drm_dev_register(drm, 0);
if (ret)
goto out_poll_fini;
drm_fbdev_generic_setup(drm, 32);
return 0;
out_poll_fini:
drm_kms_helper_poll_fini(drm);
drm_mode_config_cleanup(drm);
out_unbind:
component_unbind_all(dev, drm);
out_unregister:
dev_set_drvdata(dev, NULL);
drm_dev_put(drm);
return ret;
}
static void zx_drm_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
drm_dev_unregister(drm);
drm_kms_helper_poll_fini(drm);
drm_atomic_helper_shutdown(drm);
drm_mode_config_cleanup(drm);
component_unbind_all(dev, drm);
dev_set_drvdata(dev, NULL);
drm_dev_put(drm);
}
static const struct component_master_ops zx_drm_master_ops = {
.bind = zx_drm_bind,
.unbind = zx_drm_unbind,
};
static int compare_of(struct device *dev, void *data)
{
return dev->of_node == data;
}
static int zx_drm_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *parent = dev->of_node;
struct device_node *child;
struct component_match *match = NULL;
int ret;
ret = devm_of_platform_populate(dev);
if (ret)
return ret;
for_each_available_child_of_node(parent, child)
component_match_add(dev, &match, compare_of, child);
return component_master_add_with_match(dev, &zx_drm_master_ops, match);
}
static int zx_drm_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &zx_drm_master_ops);
return 0;
}
static const struct of_device_id zx_drm_of_match[] = {
{ .compatible = "zte,zx296718-vou", },
{ /* end */ },
};
MODULE_DEVICE_TABLE(of, zx_drm_of_match);
static struct platform_driver zx_drm_platform_driver = {
.probe = zx_drm_probe,
.remove = zx_drm_remove,
.driver = {
.name = "zx-drm",
.of_match_table = zx_drm_of_match,
},
};
static struct platform_driver *drivers[] = {
&zx_crtc_driver,
&zx_hdmi_driver,
&zx_tvenc_driver,
&zx_vga_driver,
&zx_drm_platform_driver,
};
static int zx_drm_init(void)
{
return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
}
module_init(zx_drm_init);
static void zx_drm_exit(void)
{
platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
}
module_exit(zx_drm_exit);
MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
MODULE_LICENSE("GPL v2");
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