// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2021 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_CCORR_EN                           0x0000
#define CCORR_EN                                        BIT(0)
#define DISP_CCORR_CFG                          0x0020
#define CCORR_RELAY_MODE                                BIT(0)
#define CCORR_ENGINE_EN                                 BIT(1)
#define CCORR_GAMMA_OFF                                 BIT(2)
#define CCORR_WGAMUT_SRC_CLIP                           BIT(3)
#define DISP_CCORR_SIZE                         0x0030
#define DISP_CCORR_COEF_0                       0x0080
#define DISP_CCORR_COEF_1                       0x0084
#define DISP_CCORR_COEF_2                       0x0088
#define DISP_CCORR_COEF_3                       0x008C
#define DISP_CCORR_COEF_4                       0x0090

struct mtk_disp_ccorr_data {
        u32 matrix_bits;
};

struct mtk_disp_ccorr {
        struct clk *clk;
        void __iomem *regs;
        struct cmdq_client_reg cmdq_reg;
        const struct mtk_disp_ccorr_data        *data;
};

int mtk_ccorr_clk_enable(struct device *dev)
{
        struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);

        return clk_prepare_enable(ccorr->clk);
}

void mtk_ccorr_clk_disable(struct device *dev)
{
        struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);

        clk_disable_unprepare(ccorr->clk);
}

void mtk_ccorr_config(struct device *dev, unsigned int w,
                             unsigned int h, unsigned int vrefresh,
                             unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
{
        struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);

        mtk_ddp_write(cmdq_pkt, w << 16 | h, &ccorr->cmdq_reg, ccorr->regs,
                      DISP_CCORR_SIZE);
        mtk_ddp_write(cmdq_pkt, CCORR_ENGINE_EN, &ccorr->cmdq_reg, ccorr->regs,
                      DISP_CCORR_CFG);
}

void mtk_ccorr_start(struct device *dev)
{
        struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);

        writel(CCORR_EN, ccorr->regs + DISP_CCORR_EN);
}

void mtk_ccorr_stop(struct device *dev)
{
        struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);

        writel_relaxed(0x0, ccorr->regs + DISP_CCORR_EN);
}

void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state)
{
        struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);
        struct drm_property_blob *blob = state->ctm;
        struct drm_color_ctm *ctm;
        const u64 *input;
        uint16_t coeffs[9] = { 0 };
        int i;
        struct cmdq_pkt *cmdq_pkt = NULL;
        u32 matrix_bits = ccorr->data->matrix_bits;

        if (!blob)
                return;

        ctm = (struct drm_color_ctm *)blob->data;
        input = ctm->matrix;

        for (i = 0; i < ARRAY_SIZE(coeffs); i++)
                coeffs[i] = drm_color_ctm_s31_32_to_qm_n(input[i], 2, matrix_bits);

        mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1],
                      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_0);
        mtk_ddp_write(cmdq_pkt, coeffs[2] << 16 | coeffs[3],
                      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_1);
        mtk_ddp_write(cmdq_pkt, coeffs[4] << 16 | coeffs[5],
                      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_2);
        mtk_ddp_write(cmdq_pkt, coeffs[6] << 16 | coeffs[7],
                      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_3);
        mtk_ddp_write(cmdq_pkt, coeffs[8] << 16,
                      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_4);
}

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

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

static const struct component_ops mtk_disp_ccorr_component_ops = {
        .bind   = mtk_disp_ccorr_bind,
        .unbind = mtk_disp_ccorr_unbind,
};

static int mtk_disp_ccorr_probe(struct platform_device *pdev)
{
        struct device *dev = &pdev->dev;
        struct mtk_disp_ccorr *priv;
        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 ccorr clk\n");

        priv->regs = devm_platform_ioremap_resource(pdev, 0);
        if (IS_ERR(priv->regs))
                return dev_err_probe(dev, PTR_ERR(priv->regs),
                                     "failed to ioremap ccorr\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_ccorr_component_ops);
        if (ret)
                return dev_err_probe(dev, ret, "Failed to add component\n");

        return 0;
}

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

static const struct mtk_disp_ccorr_data mt8183_ccorr_driver_data = {
        .matrix_bits = 10,
};

static const struct mtk_disp_ccorr_data mt8192_ccorr_driver_data = {
        .matrix_bits = 11,
};

static const struct of_device_id mtk_disp_ccorr_driver_dt_match[] = {
        { .compatible = "mediatek,mt8183-disp-ccorr",
          .data = &mt8183_ccorr_driver_data},
        { .compatible = "mediatek,mt8192-disp-ccorr",
          .data = &mt8192_ccorr_driver_data},
        {},
};
MODULE_DEVICE_TABLE(of, mtk_disp_ccorr_driver_dt_match);

struct platform_driver mtk_disp_ccorr_driver = {
        .probe          = mtk_disp_ccorr_probe,
        .remove         = mtk_disp_ccorr_remove,
        .driver         = {
                .name   = "mediatek-disp-ccorr",
                .of_match_table = mtk_disp_ccorr_driver_dt_match,
        },
};