drivers/gpu/drm/mediatek/mtk_disp_color.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2017 MediaTek Inc.
 */

#include <linux/clk.h>
#include <linux/component.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/soc/mediatek/mtk-cmdq.h>

#include "mtk_crtc.h"
#include "mtk_ddp_comp.h"
#include "mtk_disp_drv.h"
#include "mtk_drm_drv.h"

#define DISP_COLOR_CFG_MAIN			0x0400
#define DISP_COLOR_START_MT2701			0x0f00
#define DISP_COLOR_START_MT8167			0x0400
#define DISP_COLOR_START_MT8173			0x0c00
#define DISP_COLOR_START(comp)			((comp)->data->color_offset)
#define DISP_COLOR_WIDTH(comp)			(DISP_COLOR_START(comp) + 0x50)
#define DISP_COLOR_HEIGHT(comp)			(DISP_COLOR_START(comp) + 0x54)

#define COLOR_BYPASS_ALL			BIT(7)
#define COLOR_SEQ_SEL				BIT(13)

struct mtk_disp_color_data {
	unsigned int color_offset;
};

/*
 * struct mtk_disp_color - DISP_COLOR driver structure
 * @crtc: associated crtc to report irq events to
 * @data: platform colour driver data
 */
struct mtk_disp_color {
	struct drm_crtc				*crtc;
	struct clk				*clk;
	void __iomem				*regs;
	struct cmdq_client_reg			cmdq_reg;
	const struct mtk_disp_color_data	*data;
};

int mtk_color_clk_enable(struct device *dev)
{
	struct mtk_disp_color *color = dev_get_drvdata(dev);

	return clk_prepare_enable(color->clk);
}

void mtk_color_clk_disable(struct device *dev)
{
	struct mtk_disp_color *color = dev_get_drvdata(dev);

	clk_disable_unprepare(color->clk);
}

void mtk_color_config(struct device *dev, unsigned int w,
		      unsigned int h, unsigned int vrefresh,
		      unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
{
	struct mtk_disp_color *color = dev_get_drvdata(dev);

	mtk_ddp_write(cmdq_pkt, w, &color->cmdq_reg, color->regs, DISP_COLOR_WIDTH(color));
	mtk_ddp_write(cmdq_pkt, h, &color->cmdq_reg, color->regs, DISP_COLOR_HEIGHT(color));
}

void mtk_color_start(struct device *dev)
{
	struct mtk_disp_color *color = dev_get_drvdata(dev);

	writel(COLOR_BYPASS_ALL | COLOR_SEQ_SEL,
	       color->regs + DISP_COLOR_CFG_MAIN);
	writel(0x1, color->regs + DISP_COLOR_START(color));
}

static int mtk_disp_color_bind(struct device *dev, struct device *master,
			       void *data)
{
	return 0;
}

static void mtk_disp_color_unbind(struct device *dev, struct device *master,
				  void *data)
{
}

static const struct component_ops mtk_disp_color_component_ops = {
	.bind	= mtk_disp_color_bind,
	.unbind = mtk_disp_color_unbind,
};

static int mtk_disp_color_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct mtk_disp_color *priv;
	struct resource *res;
	int ret;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->clk = devm_clk_get(dev, NULL);
	if (IS_ERR(priv->clk))
		return dev_err_probe(dev, PTR_ERR(priv->clk),
				     "failed to get color clk\n");

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	priv->regs = devm_ioremap_resource(dev, res);
	if (IS_ERR(priv->regs))
		return dev_err_probe(dev, PTR_ERR(priv->regs),
				     "failed to ioremap color\n");
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
	ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
	if (ret)
		dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
#endif

	priv->data = of_device_get_match_data(dev);
	platform_set_drvdata(pdev, priv);

	ret = component_add(dev, &mtk_disp_color_component_ops);
	if (ret)
		return dev_err_probe(dev, ret, "Failed to add component\n");

	return 0;
}

static void mtk_disp_color_remove(struct platform_device *pdev)
{
	component_del(&pdev->dev, &mtk_disp_color_component_ops);
}

static const struct mtk_disp_color_data mt2701_color_driver_data = {
	.color_offset = DISP_COLOR_START_MT2701,
};

static const struct mtk_disp_color_data mt8167_color_driver_data = {
	.color_offset = DISP_COLOR_START_MT8167,
};

static const struct mtk_disp_color_data mt8173_color_driver_data = {
	.color_offset = DISP_COLOR_START_MT8173,
};

static const struct of_device_id mtk_disp_color_driver_dt_match[] = {
	{ .compatible = "mediatek,mt2701-disp-color",
	  .data = &mt2701_color_driver_data},
	{ .compatible = "mediatek,mt8167-disp-color",
	  .data = &mt8167_color_driver_data},
	{ .compatible = "mediatek,mt8173-disp-color",
	  .data = &mt8173_color_driver_data},
	{},
};
MODULE_DEVICE_TABLE(of, mtk_disp_color_driver_dt_match);

struct platform_driver mtk_disp_color_driver = {
	.probe		= mtk_disp_color_probe,
	.remove_new	= mtk_disp_color_remove,
	.driver		= {
		.name	= "mediatek-disp-color",
		.of_match_table = mtk_disp_color_driver_dt_match,
	},
};