177 lines
4.7 KiB
C
177 lines
4.7 KiB
C
/*
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* Copyright (c) 2017 MediaTek Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <drm/drmP.h>
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/of_device.h>
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#include <linux/of_irq.h>
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#include <linux/platform_device.h>
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#include "mtk_drm_crtc.h"
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#include "mtk_drm_ddp_comp.h"
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#define DISP_COLOR_CFG_MAIN 0x0400
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#define DISP_COLOR_START_MT2701 0x0f00
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#define DISP_COLOR_START_MT8173 0x0c00
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#define DISP_COLOR_START(comp) ((comp)->data->color_offset)
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#define DISP_COLOR_WIDTH(comp) (DISP_COLOR_START(comp) + 0x50)
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#define DISP_COLOR_HEIGHT(comp) (DISP_COLOR_START(comp) + 0x54)
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#define COLOR_BYPASS_ALL BIT(7)
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#define COLOR_SEQ_SEL BIT(13)
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struct mtk_disp_color_data {
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unsigned int color_offset;
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};
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/**
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* struct mtk_disp_color - DISP_COLOR driver structure
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* @ddp_comp - structure containing type enum and hardware resources
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* @crtc - associated crtc to report irq events to
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*/
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struct mtk_disp_color {
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struct mtk_ddp_comp ddp_comp;
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struct drm_crtc *crtc;
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const struct mtk_disp_color_data *data;
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};
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static inline struct mtk_disp_color *comp_to_color(struct mtk_ddp_comp *comp)
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{
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return container_of(comp, struct mtk_disp_color, ddp_comp);
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}
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static void mtk_color_config(struct mtk_ddp_comp *comp, unsigned int w,
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unsigned int h, unsigned int vrefresh,
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unsigned int bpc)
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{
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struct mtk_disp_color *color = comp_to_color(comp);
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writel(w, comp->regs + DISP_COLOR_WIDTH(color));
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writel(h, comp->regs + DISP_COLOR_HEIGHT(color));
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}
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static void mtk_color_start(struct mtk_ddp_comp *comp)
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{
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struct mtk_disp_color *color = comp_to_color(comp);
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writel(COLOR_BYPASS_ALL | COLOR_SEQ_SEL,
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comp->regs + DISP_COLOR_CFG_MAIN);
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writel(0x1, comp->regs + DISP_COLOR_START(color));
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}
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static const struct mtk_ddp_comp_funcs mtk_disp_color_funcs = {
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.config = mtk_color_config,
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.start = mtk_color_start,
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};
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static int mtk_disp_color_bind(struct device *dev, struct device *master,
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void *data)
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{
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struct mtk_disp_color *priv = dev_get_drvdata(dev);
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struct drm_device *drm_dev = data;
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int ret;
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ret = mtk_ddp_comp_register(drm_dev, &priv->ddp_comp);
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if (ret < 0) {
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dev_err(dev, "Failed to register component %pOF: %d\n",
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dev->of_node, ret);
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return ret;
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}
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return 0;
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}
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static void mtk_disp_color_unbind(struct device *dev, struct device *master,
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void *data)
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{
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struct mtk_disp_color *priv = dev_get_drvdata(dev);
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struct drm_device *drm_dev = data;
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mtk_ddp_comp_unregister(drm_dev, &priv->ddp_comp);
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}
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static const struct component_ops mtk_disp_color_component_ops = {
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.bind = mtk_disp_color_bind,
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.unbind = mtk_disp_color_unbind,
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};
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static int mtk_disp_color_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct mtk_disp_color *priv;
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int comp_id;
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int ret;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_COLOR);
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if (comp_id < 0) {
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dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
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return comp_id;
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}
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ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
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&mtk_disp_color_funcs);
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if (ret) {
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dev_err(dev, "Failed to initialize component: %d\n", ret);
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return ret;
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}
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priv->data = of_device_get_match_data(dev);
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platform_set_drvdata(pdev, priv);
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ret = component_add(dev, &mtk_disp_color_component_ops);
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if (ret)
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dev_err(dev, "Failed to add component: %d\n", ret);
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return ret;
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}
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static int mtk_disp_color_remove(struct platform_device *pdev)
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{
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component_del(&pdev->dev, &mtk_disp_color_component_ops);
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return 0;
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}
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static const struct mtk_disp_color_data mt2701_color_driver_data = {
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.color_offset = DISP_COLOR_START_MT2701,
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};
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static const struct mtk_disp_color_data mt8173_color_driver_data = {
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.color_offset = DISP_COLOR_START_MT8173,
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};
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static const struct of_device_id mtk_disp_color_driver_dt_match[] = {
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{ .compatible = "mediatek,mt2701-disp-color",
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.data = &mt2701_color_driver_data},
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{ .compatible = "mediatek,mt8173-disp-color",
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.data = &mt8173_color_driver_data},
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{},
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};
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MODULE_DEVICE_TABLE(of, mtk_disp_color_driver_dt_match);
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struct platform_driver mtk_disp_color_driver = {
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.probe = mtk_disp_color_probe,
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.remove = mtk_disp_color_remove,
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.driver = {
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.name = "mediatek-disp-color",
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.owner = THIS_MODULE,
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.of_match_table = mtk_disp_color_driver_dt_match,
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},
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};
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