Release 4.17 drivers/gpu/drm/mediatek/mtk_disp_color.c
/*
* Copyright (c) 2017 MediaTek Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <drm/drmP.h>
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include "mtk_drm_crtc.h"
#include "mtk_drm_ddp_comp.h"
#define DISP_COLOR_CFG_MAIN 0x0400
#define DISP_COLOR_START_MT2701 0x0f00
#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
* @ddp_comp - structure containing type enum and hardware resources
* @crtc - associated crtc to report irq events to
*/
struct mtk_disp_color {
struct mtk_ddp_comp ddp_comp;
struct drm_crtc *crtc;
const struct mtk_disp_color_data *data;
};
static inline struct mtk_disp_color *comp_to_color(struct mtk_ddp_comp *comp)
{
return container_of(comp, struct mtk_disp_color, ddp_comp);
}
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static void mtk_color_config(struct mtk_ddp_comp *comp, unsigned int w,
unsigned int h, unsigned int vrefresh,
unsigned int bpc)
{
struct mtk_disp_color *color = comp_to_color(comp);
writel(w, comp->regs + DISP_COLOR_WIDTH(color));
writel(h, comp->regs + DISP_COLOR_HEIGHT(color));
}
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static void mtk_color_start(struct mtk_ddp_comp *comp)
{
struct mtk_disp_color *color = comp_to_color(comp);
writel(COLOR_BYPASS_ALL | COLOR_SEQ_SEL,
comp->regs + DISP_COLOR_CFG_MAIN);
writel(0x1, comp->regs + DISP_COLOR_START(color));
}
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static const struct mtk_ddp_comp_funcs mtk_disp_color_funcs = {
.config = mtk_color_config,
.start = mtk_color_start,
};
static int mtk_disp_color_bind(struct device *dev, struct device *master,
void *data)
{
struct mtk_disp_color *priv = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
int ret;
ret = mtk_ddp_comp_register(drm_dev, &priv->ddp_comp);
if (ret < 0) {
dev_err(dev, "Failed to register component %pOF: %d\n",
dev->of_node, ret);
return ret;
}
return 0;
}
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static void mtk_disp_color_unbind(struct device *dev, struct device *master,
void *data)
{
struct mtk_disp_color *priv = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
mtk_ddp_comp_unregister(drm_dev, &priv->ddp_comp);
}
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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;
int comp_id;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_COLOR);
if (comp_id < 0) {
dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
return comp_id;
}
ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
&mtk_disp_color_funcs);
if (ret) {
dev_err(dev, "Failed to initialize component: %d\n", ret);
return ret;
}
priv->data = of_device_get_match_data(dev);
platform_set_drvdata(pdev, priv);
ret = component_add(dev, &mtk_disp_color_component_ops);
if (ret)
dev_err(dev, "Failed to add component: %d\n", ret);
return ret;
}
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static int mtk_disp_color_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &mtk_disp_color_component_ops);
return 0;
}
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static const struct mtk_disp_color_data mt2701_color_driver_data = {
.color_offset = DISP_COLOR_START_MT2701,
};
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,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 = mtk_disp_color_remove,
.driver = {
.name = "mediatek-disp-color",
.owner = THIS_MODULE,
.of_match_table = mtk_disp_color_driver_dt_match,
},
};
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