#include <linux/clk.h>
#include <linux/component.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <drm/clients/drm_client_setup.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_dma.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_managed.h>
#include <drm/drm_modeset_helper.h>
#include <drm/drm_of.h>
#include "dc-de.h"
#include "dc-drv.h"
#include "dc-pe.h"
struct dc_priv {
struct drm_device *drm;
struct clk *clk_cfg;
};
DEFINE_DRM_GEM_DMA_FOPS(dc_drm_driver_fops);
static struct drm_driver dc_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
DRM_GEM_DMA_DRIVER_OPS,
DRM_FBDEV_DMA_DRIVER_OPS,
.fops = &dc_drm_driver_fops,
.name = "imx8-dc",
.desc = "i.MX8 DC DRM graphics",
.major = 1,
.minor = 0,
.patchlevel = 0,
};
static void
dc_add_components(struct device *dev, struct component_match **matchptr)
{
struct device_node *child, *grandchild;
for_each_available_child_of_node(dev->of_node, child) {
if (of_device_is_compatible(child, "fsl,imx8qxp-dc-intc"))
continue;
drm_of_component_match_add(dev, matchptr, component_compare_of,
child);
for_each_available_child_of_node(child, grandchild)
drm_of_component_match_add(dev, matchptr,
component_compare_of,
grandchild);
}
}
static int dc_drm_component_bind_all(struct dc_drm_device *dc_drm)
{
struct drm_device *drm = &dc_drm->base;
int ret;
ret = component_bind_all(drm->dev, dc_drm);
if (ret)
return ret;
dc_de_post_bind(dc_drm);
dc_pe_post_bind(dc_drm);
return 0;
}
static void dc_drm_component_unbind_all(void *ptr)
{
struct dc_drm_device *dc_drm = ptr;
struct drm_device *drm = &dc_drm->base;
component_unbind_all(drm->dev, dc_drm);
}
static int dc_drm_bind(struct device *dev)
{
struct dc_priv *priv = dev_get_drvdata(dev);
struct dc_drm_device *dc_drm;
struct drm_device *drm;
int ret;
dc_drm = devm_drm_dev_alloc(dev, &dc_drm_driver, struct dc_drm_device,
base);
if (IS_ERR(dc_drm))
return PTR_ERR(dc_drm);
drm = &dc_drm->base;
ret = dc_drm_component_bind_all(dc_drm);
if (ret)
return ret;
ret = devm_add_action_or_reset(dev, dc_drm_component_unbind_all,
dc_drm);
if (ret)
return ret;
ret = dc_kms_init(dc_drm);
if (ret)
return ret;
ret = drm_dev_register(drm, 0);
if (ret) {
dev_err(dev, "failed to register drm device: %d\n", ret);
goto err;
}
drm_client_setup_with_fourcc(drm, DRM_FORMAT_XRGB8888);
priv->drm = drm;
return 0;
err:
dc_kms_uninit(dc_drm);
return ret;
}
static void dc_drm_unbind(struct device *dev)
{
struct dc_priv *priv = dev_get_drvdata(dev);
struct dc_drm_device *dc_drm = to_dc_drm_device(priv->drm);
struct drm_device *drm = &dc_drm->base;
priv->drm = NULL;
drm_dev_unplug(drm);
dc_kms_uninit(dc_drm);
drm_atomic_helper_shutdown(drm);
}
static const struct component_master_ops dc_drm_ops = {
.bind = dc_drm_bind,
.unbind = dc_drm_unbind,
};
static int dc_probe(struct platform_device *pdev)
{
struct component_match *match = NULL;
struct dc_priv *priv;
int ret;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->clk_cfg = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(priv->clk_cfg))
return dev_err_probe(&pdev->dev, PTR_ERR(priv->clk_cfg),
"failed to get cfg clock\n");
dev_set_drvdata(&pdev->dev, priv);
ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
return ret;
ret = devm_pm_runtime_enable(&pdev->dev);
if (ret)
return ret;
ret = devm_of_platform_populate(&pdev->dev);
if (ret)
return ret;
dc_add_components(&pdev->dev, &match);
ret = component_master_add_with_match(&pdev->dev, &dc_drm_ops, match);
if (ret)
return dev_err_probe(&pdev->dev, ret,
"failed to add component master\n");
return 0;
}
static void dc_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &dc_drm_ops);
}
static int dc_runtime_suspend(struct device *dev)
{
struct dc_priv *priv = dev_get_drvdata(dev);
clk_disable_unprepare(priv->clk_cfg);
return 0;
}
static int dc_runtime_resume(struct device *dev)
{
struct dc_priv *priv = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(priv->clk_cfg);
if (ret)
dev_err(dev, "failed to enable cfg clock: %d\n", ret);
return ret;
}
static int dc_suspend(struct device *dev)
{
struct dc_priv *priv = dev_get_drvdata(dev);
return drm_mode_config_helper_suspend(priv->drm);
}
static int dc_resume(struct device *dev)
{
struct dc_priv *priv = dev_get_drvdata(dev);
return drm_mode_config_helper_resume(priv->drm);
}
static void dc_shutdown(struct platform_device *pdev)
{
struct dc_priv *priv = dev_get_drvdata(&pdev->dev);
drm_atomic_helper_shutdown(priv->drm);
}
static const struct dev_pm_ops dc_pm_ops = {
RUNTIME_PM_OPS(dc_runtime_suspend, dc_runtime_resume, NULL)
SYSTEM_SLEEP_PM_OPS(dc_suspend, dc_resume)
};
static const struct of_device_id dc_dt_ids[] = {
{ .compatible = "fsl,imx8qxp-dc", },
{ }
};
MODULE_DEVICE_TABLE(of, dc_dt_ids);
static struct platform_driver dc_driver = {
.probe = dc_probe,
.remove = dc_remove,
.shutdown = dc_shutdown,
.driver = {
.name = "imx8-dc",
.of_match_table = dc_dt_ids,
.pm = pm_sleep_ptr(&dc_pm_ops),
},
};
static struct platform_driver * const dc_drivers[] = {
&dc_cf_driver,
&dc_de_driver,
&dc_ed_driver,
&dc_fg_driver,
&dc_fl_driver,
&dc_fw_driver,
&dc_ic_driver,
&dc_lb_driver,
&dc_pe_driver,
&dc_tc_driver,
&dc_driver,
};
static int __init dc_drm_init(void)
{
return platform_register_drivers(dc_drivers, ARRAY_SIZE(dc_drivers));
}
static void __exit dc_drm_exit(void)
{
platform_unregister_drivers(dc_drivers, ARRAY_SIZE(dc_drivers));
}
module_init(dc_drm_init);
module_exit(dc_drm_exit);
MODULE_DESCRIPTION("i.MX8 Display Controller DRM Driver");
MODULE_AUTHOR("Liu Ying <victor.liu@nxp.com>");
MODULE_LICENSE("GPL");
