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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2021 MediaTek Inc.
*/
#include <linux/bitfield.h>
#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_disp_drv.h"
#include "mtk_drm_crtc.h"
#include "mtk_drm_ddp_comp.h"
#include "mtk_drm_drv.h"
#define DISP_AAL_EN 0x0000
#define AAL_EN BIT(0)
#define DISP_AAL_CFG 0x0020
#define AAL_RELAY_MODE BIT(0)
#define AAL_GAMMA_LUT_EN BIT(1)
#define DISP_AAL_SIZE 0x0030
#define DISP_AAL_SIZE_HSIZE GENMASK(28, 16)
#define DISP_AAL_SIZE_VSIZE GENMASK(12, 0)
#define DISP_AAL_OUTPUT_SIZE 0x04d8
#define DISP_AAL_GAMMA_LUT 0x0700
#define DISP_AAL_GAMMA_LUT_R GENMASK(29, 20)
#define DISP_AAL_GAMMA_LUT_G GENMASK(19, 10)
#define DISP_AAL_GAMMA_LUT_B GENMASK(9, 0)
#define DISP_AAL_LUT_BITS 10
#define DISP_AAL_LUT_SIZE 512
struct mtk_disp_aal_data {
bool has_gamma;
};
/**
* struct mtk_disp_aal - Display Adaptive Ambient Light driver structure
* @clk: clock for DISP_AAL controller
* @regs: MMIO registers base
* @cmdq_reg: CMDQ Client register
* @data: platform specific data for DISP_AAL
*/
struct mtk_disp_aal {
struct clk *clk;
void __iomem *regs;
struct cmdq_client_reg cmdq_reg;
const struct mtk_disp_aal_data *data;
};
int mtk_aal_clk_enable(struct device *dev)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
return clk_prepare_enable(aal->clk);
}
void mtk_aal_clk_disable(struct device *dev)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
clk_disable_unprepare(aal->clk);
}
void mtk_aal_config(struct device *dev, unsigned int w,
unsigned int h, unsigned int vrefresh,
unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
u32 sz;
sz = FIELD_PREP(DISP_AAL_SIZE_HSIZE, w);
sz |= FIELD_PREP(DISP_AAL_SIZE_VSIZE, h);
mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE);
mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE);
}
/**
* mtk_aal_gamma_get_lut_size() - Get gamma LUT size for AAL
* @dev: Pointer to struct device
*
* Return: 0 if gamma control not supported in AAL or gamma LUT size
*/
unsigned int mtk_aal_gamma_get_lut_size(struct device *dev)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
if (aal->data && aal->data->has_gamma)
return DISP_AAL_LUT_SIZE;
return 0;
}
void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
struct drm_color_lut *lut;
unsigned int i;
u32 cfg_val;
/* If gamma is not supported in AAL, go out immediately */
if (!(aal->data && aal->data->has_gamma))
return;
/* Also, if there's no gamma lut there's nothing to do here. */
if (!state->gamma_lut)
return;
lut = (struct drm_color_lut *)state->gamma_lut->data;
for (i = 0; i < DISP_AAL_LUT_SIZE; i++) {
struct drm_color_lut hwlut = {
.red = drm_color_lut_extract(lut[i].red, DISP_AAL_LUT_BITS),
.green = drm_color_lut_extract(lut[i].green, DISP_AAL_LUT_BITS),
.blue = drm_color_lut_extract(lut[i].blue, DISP_AAL_LUT_BITS)
};
u32 word;
word = FIELD_PREP(DISP_AAL_GAMMA_LUT_R, hwlut.red);
word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_G, hwlut.green);
word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_B, hwlut.blue);
writel(word, aal->regs + DISP_AAL_GAMMA_LUT + i * 4);
}
cfg_val = readl(aal->regs + DISP_AAL_CFG);
/* Enable the gamma table */
cfg_val |= FIELD_PREP(AAL_GAMMA_LUT_EN, 1);
/* Disable RELAY mode to pass the processed image */
cfg_val &= ~AAL_RELAY_MODE;
writel(cfg_val, aal->regs + DISP_AAL_CFG);
}
void mtk_aal_start(struct device *dev)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
writel(AAL_EN, aal->regs + DISP_AAL_EN);
}
void mtk_aal_stop(struct device *dev)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
writel_relaxed(0x0, aal->regs + DISP_AAL_EN);
}
static int mtk_disp_aal_bind(struct device *dev, struct device *master,
void *data)
{
return 0;
}
static void mtk_disp_aal_unbind(struct device *dev, struct device *master,
void *data)
{
}
static const struct component_ops mtk_disp_aal_component_ops = {
.bind = mtk_disp_aal_bind,
.unbind = mtk_disp_aal_unbind,
};
static int mtk_disp_aal_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mtk_disp_aal *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)) {
dev_err(dev, "failed to get aal clk\n");
return PTR_ERR(priv->clk);
}
priv->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(priv->regs)) {
dev_err(dev, "failed to ioremap aal\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_aal_component_ops);
if (ret)
dev_err(dev, "Failed to add component: %d\n", ret);
return ret;
}
static void mtk_disp_aal_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &mtk_disp_aal_component_ops);
}
static const struct mtk_disp_aal_data mt8173_aal_driver_data = {
.has_gamma = true,
};
static const struct of_device_id mtk_disp_aal_driver_dt_match[] = {
{ .compatible = "mediatek,mt8173-disp-aal", .data = &mt8173_aal_driver_data },
{ .compatible = "mediatek,mt8183-disp-aal" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match);
struct platform_driver mtk_disp_aal_driver = {
.probe = mtk_disp_aal_probe,
.remove_new = mtk_disp_aal_remove,
.driver = {
.name = "mediatek-disp-aal",
.owner = THIS_MODULE,
.of_match_table = mtk_disp_aal_driver_dt_match,
},
};
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