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(clk: 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(clk: 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, value: w, cmdq_reg: &color->cmdq_reg, regs: color->regs, DISP_COLOR_WIDTH(color));
67 mtk_ddp_write(cmdq_pkt, value: h, cmdq_reg: &color->cmdq_reg, regs: 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 addr: color->regs + DISP_COLOR_CFG_MAIN);
76 writel(val: 0x1, addr: 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, size: sizeof(*priv), GFP_KERNEL);
103 if (!priv)
104 return -ENOMEM;
105
106 priv->clk = devm_clk_get(dev, NULL);
107 if (IS_ERR(ptr: priv->clk)) {
108 dev_err(dev, "failed to get color clk\n");
109 return PTR_ERR(ptr: 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(ptr: priv->regs)) {
115 dev_err(dev, "failed to ioremap color\n");
116 return PTR_ERR(ptr: priv->regs);
117 }
118#if IS_REACHABLE(CONFIG_MTK_CMDQ)
119 ret = cmdq_dev_get_client_reg(dev, client_reg: &priv->cmdq_reg, idx: 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, data: 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

source code of linux/drivers/gpu/drm/mediatek/mtk_disp_color.c