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_device.h>
10 #include <linux/of_irq.h>
11 #include <linux/platform_device.h>
12 #include <linux/soc/mediatek/mtk-cmdq.h>
13
14 #include "mtk_drm_crtc.h"
15 #include "mtk_drm_ddp_comp.h"
16
17 #define DISP_COLOR_CFG_MAIN 0x0400
18 #define DISP_COLOR_START_MT2701 0x0f00
19 #define DISP_COLOR_START_MT8173 0x0c00
20 #define DISP_COLOR_START(comp) ((comp)->data->color_offset)
21 #define DISP_COLOR_WIDTH(comp) (DISP_COLOR_START(comp) + 0x50)
22 #define DISP_COLOR_HEIGHT(comp) (DISP_COLOR_START(comp) + 0x54)
23
24 #define COLOR_BYPASS_ALL BIT(7)
25 #define COLOR_SEQ_SEL BIT(13)
26
27 struct mtk_disp_color_data {
28 unsigned int color_offset;
29 };
30
31 /**
32 * struct mtk_disp_color - DISP_COLOR driver structure
33 * @ddp_comp - structure containing type enum and hardware resources
34 * @crtc - associated crtc to report irq events to
35 */
36 struct mtk_disp_color {
37 struct mtk_ddp_comp ddp_comp;
38 struct drm_crtc *crtc;
39 const struct mtk_disp_color_data *data;
40 };
41
comp_to_color(struct mtk_ddp_comp * comp)42 static inline struct mtk_disp_color *comp_to_color(struct mtk_ddp_comp *comp)
43 {
44 return container_of(comp, struct mtk_disp_color, ddp_comp);
45 }
46
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)47 static void mtk_color_config(struct mtk_ddp_comp *comp, unsigned int w,
48 unsigned int h, unsigned int vrefresh,
49 unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
50 {
51 struct mtk_disp_color *color = comp_to_color(comp);
52
53 mtk_ddp_write(cmdq_pkt, w, comp, DISP_COLOR_WIDTH(color));
54 mtk_ddp_write(cmdq_pkt, h, comp, DISP_COLOR_HEIGHT(color));
55 }
56
mtk_color_start(struct mtk_ddp_comp * comp)57 static void mtk_color_start(struct mtk_ddp_comp *comp)
58 {
59 struct mtk_disp_color *color = comp_to_color(comp);
60
61 writel(COLOR_BYPASS_ALL | COLOR_SEQ_SEL,
62 comp->regs + DISP_COLOR_CFG_MAIN);
63 writel(0x1, comp->regs + DISP_COLOR_START(color));
64 }
65
66 static const struct mtk_ddp_comp_funcs mtk_disp_color_funcs = {
67 .config = mtk_color_config,
68 .start = mtk_color_start,
69 };
70
mtk_disp_color_bind(struct device * dev,struct device * master,void * data)71 static int mtk_disp_color_bind(struct device *dev, struct device *master,
72 void *data)
73 {
74 struct mtk_disp_color *priv = dev_get_drvdata(dev);
75 struct drm_device *drm_dev = data;
76 int ret;
77
78 ret = mtk_ddp_comp_register(drm_dev, &priv->ddp_comp);
79 if (ret < 0) {
80 dev_err(dev, "Failed to register component %pOF: %d\n",
81 dev->of_node, ret);
82 return ret;
83 }
84
85 return 0;
86 }
87
mtk_disp_color_unbind(struct device * dev,struct device * master,void * data)88 static void mtk_disp_color_unbind(struct device *dev, struct device *master,
89 void *data)
90 {
91 struct mtk_disp_color *priv = dev_get_drvdata(dev);
92 struct drm_device *drm_dev = data;
93
94 mtk_ddp_comp_unregister(drm_dev, &priv->ddp_comp);
95 }
96
97 static const struct component_ops mtk_disp_color_component_ops = {
98 .bind = mtk_disp_color_bind,
99 .unbind = mtk_disp_color_unbind,
100 };
101
mtk_disp_color_probe(struct platform_device * pdev)102 static int mtk_disp_color_probe(struct platform_device *pdev)
103 {
104 struct device *dev = &pdev->dev;
105 struct mtk_disp_color *priv;
106 int comp_id;
107 int ret;
108
109 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
110 if (!priv)
111 return -ENOMEM;
112
113 comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_COLOR);
114 if (comp_id < 0) {
115 dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
116 return comp_id;
117 }
118
119 ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
120 &mtk_disp_color_funcs);
121 if (ret) {
122 if (ret != -EPROBE_DEFER)
123 dev_err(dev, "Failed to initialize component: %d\n",
124 ret);
125
126 return ret;
127 }
128
129 priv->data = of_device_get_match_data(dev);
130
131 platform_set_drvdata(pdev, priv);
132
133 ret = component_add(dev, &mtk_disp_color_component_ops);
134 if (ret)
135 dev_err(dev, "Failed to add component: %d\n", ret);
136
137 return ret;
138 }
139
mtk_disp_color_remove(struct platform_device * pdev)140 static int mtk_disp_color_remove(struct platform_device *pdev)
141 {
142 component_del(&pdev->dev, &mtk_disp_color_component_ops);
143
144 return 0;
145 }
146
147 static const struct mtk_disp_color_data mt2701_color_driver_data = {
148 .color_offset = DISP_COLOR_START_MT2701,
149 };
150
151 static const struct mtk_disp_color_data mt8173_color_driver_data = {
152 .color_offset = DISP_COLOR_START_MT8173,
153 };
154
155 static const struct of_device_id mtk_disp_color_driver_dt_match[] = {
156 { .compatible = "mediatek,mt2701-disp-color",
157 .data = &mt2701_color_driver_data},
158 { .compatible = "mediatek,mt8173-disp-color",
159 .data = &mt8173_color_driver_data},
160 {},
161 };
162 MODULE_DEVICE_TABLE(of, mtk_disp_color_driver_dt_match);
163
164 struct platform_driver mtk_disp_color_driver = {
165 .probe = mtk_disp_color_probe,
166 .remove = mtk_disp_color_remove,
167 .driver = {
168 .name = "mediatek-disp-color",
169 .owner = THIS_MODULE,
170 .of_match_table = mtk_disp_color_driver_dt_match,
171 },
172 };
173
