1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2017 MediaTek Inc.
4 */
5
6#include <linux/clk.h>
7#include <linux/component.h>
8#include <linux/module.h>
9#include <linux/of.h>
10#include <linux/platform_device.h>
11#include <linux/soc/mediatek/mtk-cmdq.h>
12
13#include "mtk_disp_drv.h"
14#include "mtk_drm_crtc.h"
15#include "mtk_drm_ddp_comp.h"
16#include "mtk_drm_drv.h"
17
18#define DISP_COLOR_CFG_MAIN			0x0400
19#define DISP_COLOR_START_MT2701			0x0f00
20#define DISP_COLOR_START_MT8167			0x0400
21#define DISP_COLOR_START_MT8173			0x0c00
22#define DISP_COLOR_START(comp)			((comp)->data->color_offset)
23#define DISP_COLOR_WIDTH(comp)			(DISP_COLOR_START(comp) + 0x50)
24#define DISP_COLOR_HEIGHT(comp)			(DISP_COLOR_START(comp) + 0x54)
25
26#define COLOR_BYPASS_ALL			BIT(7)
27#define COLOR_SEQ_SEL				BIT(13)
28
29struct mtk_disp_color_data {
30	unsigned int color_offset;
31};
32
33/*
34 * struct mtk_disp_color - DISP_COLOR driver structure
35 * @crtc: associated crtc to report irq events to
36 * @data: platform colour driver data
37 */
38struct mtk_disp_color {
39	struct drm_crtc				*crtc;
40	struct clk				*clk;
41	void __iomem				*regs;
42	struct cmdq_client_reg			cmdq_reg;
43	const struct mtk_disp_color_data	*data;
44};
45
46int mtk_color_clk_enable(struct device *dev)
47{
48	struct mtk_disp_color *color = dev_get_drvdata(dev);
49
50	return clk_prepare_enable(color->clk);
51}
52
53void mtk_color_clk_disable(struct device *dev)
54{
55	struct mtk_disp_color *color = dev_get_drvdata(dev);
56
57	clk_disable_unprepare(color->clk);
58}
59
60void mtk_color_config(struct device *dev, unsigned int w,
61		      unsigned int h, unsigned int vrefresh,
62		      unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
63{
64	struct mtk_disp_color *color = dev_get_drvdata(dev);
65
66	mtk_ddp_write(cmdq_pkt, w, &color->cmdq_reg, color->regs, DISP_COLOR_WIDTH(color));
67	mtk_ddp_write(cmdq_pkt, h, &color->cmdq_reg, color->regs, DISP_COLOR_HEIGHT(color));
68}
69
70void mtk_color_start(struct device *dev)
71{
72	struct mtk_disp_color *color = dev_get_drvdata(dev);
73
74	writel(COLOR_BYPASS_ALL | COLOR_SEQ_SEL,
75	       color->regs + DISP_COLOR_CFG_MAIN);
76	writel(0x1, color->regs + DISP_COLOR_START(color));
77}
78
79static int mtk_disp_color_bind(struct device *dev, struct device *master,
80			       void *data)
81{
82	return 0;
83}
84
85static void mtk_disp_color_unbind(struct device *dev, struct device *master,
86				  void *data)
87{
88}
89
90static const struct component_ops mtk_disp_color_component_ops = {
91	.bind	= mtk_disp_color_bind,
92	.unbind = mtk_disp_color_unbind,
93};
94
95static int mtk_disp_color_probe(struct platform_device *pdev)
96{
97	struct device *dev = &pdev->dev;
98	struct mtk_disp_color *priv;
99	struct resource *res;
100	int ret;
101
102	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
103	if (!priv)
104		return -ENOMEM;
105
106	priv->clk = devm_clk_get(dev, NULL);
107	if (IS_ERR(priv->clk)) {
108		dev_err(dev, "failed to get color clk\n");
109		return PTR_ERR(priv->clk);
110	}
111
112	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
113	priv->regs = devm_ioremap_resource(dev, res);
114	if (IS_ERR(priv->regs)) {
115		dev_err(dev, "failed to ioremap color\n");
116		return PTR_ERR(priv->regs);
117	}
118#if IS_REACHABLE(CONFIG_MTK_CMDQ)
119	ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
120	if (ret)
121		dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
122#endif
123
124	priv->data = of_device_get_match_data(dev);
125	platform_set_drvdata(pdev, priv);
126
127	ret = component_add(dev, &mtk_disp_color_component_ops);
128	if (ret)
129		dev_err(dev, "Failed to add component: %d\n", ret);
130
131	return ret;
132}
133
134static void mtk_disp_color_remove(struct platform_device *pdev)
135{
136	component_del(&pdev->dev, &mtk_disp_color_component_ops);
137}
138
139static const struct mtk_disp_color_data mt2701_color_driver_data = {
140	.color_offset = DISP_COLOR_START_MT2701,
141};
142
143static const struct mtk_disp_color_data mt8167_color_driver_data = {
144	.color_offset = DISP_COLOR_START_MT8167,
145};
146
147static const struct mtk_disp_color_data mt8173_color_driver_data = {
148	.color_offset = DISP_COLOR_START_MT8173,
149};
150
151static const struct of_device_id mtk_disp_color_driver_dt_match[] = {
152	{ .compatible = "mediatek,mt2701-disp-color",
153	  .data = &mt2701_color_driver_data},
154	{ .compatible = "mediatek,mt8167-disp-color",
155	  .data = &mt8167_color_driver_data},
156	{ .compatible = "mediatek,mt8173-disp-color",
157	  .data = &mt8173_color_driver_data},
158	{},
159};
160MODULE_DEVICE_TABLE(of, mtk_disp_color_driver_dt_match);
161
162struct platform_driver mtk_disp_color_driver = {
163	.probe		= mtk_disp_color_probe,
164	.remove_new	= mtk_disp_color_remove,
165	.driver		= {
166		.name	= "mediatek-disp-color",
167		.owner	= THIS_MODULE,
168		.of_match_table = mtk_disp_color_driver_dt_match,
169	},
170};
171