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// 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_device.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/soc/mediatek/mtk-cmdq.h>
#include "mtk_disp_drv.h"
#include "mtk_drm_crtc.h"
#include "mtk_drm_ddp_comp.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 - DISP_CCORR driver structure
* @ddp_comp - structure containing type enum and hardware resources
* @crtc - associated crtc to report irq events to
*/
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);
}
/* Converts a DRM S31.32 value to the HW S1.n format. */
static u16 mtk_ctm_s31_32_to_s1_n(u64 in, u32 n)
{
u16 r;
/* Sign bit. */
r = in & BIT_ULL(63) ? BIT(n + 1) : 0;
if ((in & GENMASK_ULL(62, 33)) > 0) {
/* identity value 0x100000000 -> 0x400(mt8183), */
/* identity value 0x100000000 -> 0x800(mt8192), */
/* if bigger this, set it to max 0x7ff. */
r |= GENMASK(n, 0);
} else {
/* take the n+1 most important bits. */
r |= (in >> (32 - n)) & GENMASK(n, 0);
}
return r;
}
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] = mtk_ctm_s31_32_to_s1_n(input[i], 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;
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)) {
dev_err(dev, "failed to get ccorr clk\n");
return PTR_ERR(priv->clk);
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
priv->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->regs)) {
dev_err(dev, "failed to ioremap ccorr\n");
return PTR_ERR(priv->regs);
}
#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)
dev_err(dev, "Failed to add component: %d\n", ret);
return ret;
}
static int mtk_disp_ccorr_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &mtk_disp_ccorr_component_ops);
return 0;
}
static const struct mtk_disp_ccorr_data mt8183_ccorr_driver_data = {
.matrix_bits = 10,
};
static const struct of_device_id mtk_disp_ccorr_driver_dt_match[] = {
{ .compatible = "mediatek,mt8183-disp-ccorr",
.data = &mt8183_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",
.owner = THIS_MODULE,
.of_match_table = mtk_disp_ccorr_driver_dt_match,
},
};
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