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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Copyright (c) 2017 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_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);
- }
- static void mtk_color_config(struct mtk_ddp_comp *comp, unsigned int w,
- unsigned int h, unsigned int vrefresh,
- unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
- {
- struct mtk_disp_color *color = comp_to_color(comp);
- mtk_ddp_write(cmdq_pkt, w, comp, DISP_COLOR_WIDTH(color));
- mtk_ddp_write(cmdq_pkt, h, comp, DISP_COLOR_HEIGHT(color));
- }
- 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));
- }
- 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;
- }
- 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);
- }
- 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) {
- if (ret != -EPROBE_DEFER)
- 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;
- }
- static int mtk_disp_color_remove(struct platform_device *pdev)
- {
- component_del(&pdev->dev, &mtk_disp_color_component_ops);
- return 0;
- }
- 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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