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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2024 NXP
*/
#include <linux/component.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include "dc-de.h"
#include "dc-drv.h"
#define POLARITYCTRL 0xc
#define POLEN_HIGH BIT(2)
static const struct dc_subdev_info dc_de_info[] = {
{ .reg_start = 0x5618b400, .id = 0, },
{ .reg_start = 0x5618b420, .id = 1, },
};
static const struct regmap_range dc_de_regmap_ranges[] = {
regmap_reg_range(POLARITYCTRL, POLARITYCTRL),
};
static const struct regmap_access_table dc_de_regmap_access_table = {
.yes_ranges = dc_de_regmap_ranges,
.n_yes_ranges = ARRAY_SIZE(dc_de_regmap_ranges),
};
static const struct regmap_config dc_de_top_regmap_config = {
.name = "top",
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.fast_io = true,
.wr_table = &dc_de_regmap_access_table,
.rd_table = &dc_de_regmap_access_table,
.max_register = POLARITYCTRL,
};
static inline void dc_dec_init(struct dc_de *de)
{
regmap_write_bits(de->reg_top, POLARITYCTRL, POLARITYCTRL, POLEN_HIGH);
}
static int dc_de_bind(struct device *dev, struct device *master, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct dc_drm_device *dc_drm = data;
struct resource *res_top;
void __iomem *base_top;
struct dc_de *de;
int ret, id;
de = devm_kzalloc(dev, sizeof(*de), GFP_KERNEL);
if (!de)
return -ENOMEM;
base_top = devm_platform_get_and_ioremap_resource(pdev, 0, &res_top);
if (IS_ERR(base_top))
return PTR_ERR(base_top);
de->reg_top = devm_regmap_init_mmio(dev, base_top,
&dc_de_top_regmap_config);
if (IS_ERR(de->reg_top))
return PTR_ERR(de->reg_top);
de->irq_shdload = platform_get_irq_byname(pdev, "shdload");
if (de->irq_shdload < 0)
return de->irq_shdload;
de->irq_framecomplete = platform_get_irq_byname(pdev, "framecomplete");
if (de->irq_framecomplete < 0)
return de->irq_framecomplete;
de->irq_seqcomplete = platform_get_irq_byname(pdev, "seqcomplete");
if (de->irq_seqcomplete < 0)
return de->irq_seqcomplete;
de->dev = dev;
dev_set_drvdata(dev, de);
ret = devm_pm_runtime_enable(dev);
if (ret)
return ret;
id = dc_subdev_get_id(dc_de_info, ARRAY_SIZE(dc_de_info), res_top);
if (id < 0) {
dev_err(dev, "failed to get instance number: %d\n", id);
return id;
}
dc_drm->de[id] = de;
return 0;
}
/*
* It's possible to get the child device pointers from the child component
* bind callbacks, but it depends on the component helper behavior to bind
* the display engine component first. To avoid the dependency, post bind
* to get the pointers from dc_drm in a safe manner.
*/
void dc_de_post_bind(struct dc_drm_device *dc_drm)
{
struct dc_de *de;
int i;
for (i = 0; i < DC_DISPLAYS; i++) {
de = dc_drm->de[i];
de->fg = dc_drm->fg[i];
de->tc = dc_drm->tc[i];
}
}
static const struct component_ops dc_de_ops = {
.bind = dc_de_bind,
};
static int dc_de_probe(struct platform_device *pdev)
{
int ret;
ret = devm_of_platform_populate(&pdev->dev);
if (ret < 0)
return ret;
ret = component_add(&pdev->dev, &dc_de_ops);
if (ret)
return dev_err_probe(&pdev->dev, ret,
"failed to add component\n");
return 0;
}
static void dc_de_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &dc_de_ops);
}
static int dc_de_runtime_resume(struct device *dev)
{
struct dc_de *de = dev_get_drvdata(dev);
dc_dec_init(de);
dc_fg_init(de->fg);
dc_tc_init(de->tc);
return 0;
}
static const struct dev_pm_ops dc_de_pm_ops = {
RUNTIME_PM_OPS(NULL, dc_de_runtime_resume, NULL)
};
static const struct of_device_id dc_de_dt_ids[] = {
{ .compatible = "fsl,imx8qxp-dc-display-engine" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, dc_de_dt_ids);
struct platform_driver dc_de_driver = {
.probe = dc_de_probe,
.remove = dc_de_remove,
.driver = {
.name = "imx8-dc-display-engine",
.suppress_bind_attrs = true,
.of_match_table = dc_de_dt_ids,
.pm = pm_sleep_ptr(&dc_de_pm_ops),
},
};
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