1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2021 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_disp_drv.h"
15 #include "mtk_drm_crtc.h"
16 #include "mtk_drm_ddp_comp.h"
17
18 #define DISP_AAL_EN 0x0000
19 #define AAL_EN BIT(0)
20 #define DISP_AAL_SIZE 0x0030
21 #define DISP_AAL_OUTPUT_SIZE 0x04d8
22
23
24 struct mtk_disp_aal_data {
25 bool has_gamma;
26 };
27
28 /**
29 * struct mtk_disp_aal - DISP_AAL driver structure
30 * @ddp_comp - structure containing type enum and hardware resources
31 * @crtc - associated crtc to report irq events to
32 */
33 struct mtk_disp_aal {
34 struct clk *clk;
35 void __iomem *regs;
36 struct cmdq_client_reg cmdq_reg;
37 const struct mtk_disp_aal_data *data;
38 };
39
mtk_aal_clk_enable(struct device * dev)40 int mtk_aal_clk_enable(struct device *dev)
41 {
42 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
43
44 return clk_prepare_enable(aal->clk);
45 }
46
mtk_aal_clk_disable(struct device * dev)47 void mtk_aal_clk_disable(struct device *dev)
48 {
49 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
50
51 clk_disable_unprepare(aal->clk);
52 }
53
mtk_aal_config(struct device * dev,unsigned int w,unsigned int h,unsigned int vrefresh,unsigned int bpc,struct cmdq_pkt * cmdq_pkt)54 void mtk_aal_config(struct device *dev, unsigned int w,
55 unsigned int h, unsigned int vrefresh,
56 unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
57 {
58 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
59
60 mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE);
61 mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE);
62 }
63
mtk_aal_gamma_set(struct device * dev,struct drm_crtc_state * state)64 void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
65 {
66 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
67
68 if (aal->data && aal->data->has_gamma)
69 mtk_gamma_set_common(aal->regs, state, false);
70 }
71
mtk_aal_start(struct device * dev)72 void mtk_aal_start(struct device *dev)
73 {
74 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
75
76 writel(AAL_EN, aal->regs + DISP_AAL_EN);
77 }
78
mtk_aal_stop(struct device * dev)79 void mtk_aal_stop(struct device *dev)
80 {
81 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
82
83 writel_relaxed(0x0, aal->regs + DISP_AAL_EN);
84 }
85
mtk_disp_aal_bind(struct device * dev,struct device * master,void * data)86 static int mtk_disp_aal_bind(struct device *dev, struct device *master,
87 void *data)
88 {
89 return 0;
90 }
91
mtk_disp_aal_unbind(struct device * dev,struct device * master,void * data)92 static void mtk_disp_aal_unbind(struct device *dev, struct device *master,
93 void *data)
94 {
95 }
96
97 static const struct component_ops mtk_disp_aal_component_ops = {
98 .bind = mtk_disp_aal_bind,
99 .unbind = mtk_disp_aal_unbind,
100 };
101
mtk_disp_aal_probe(struct platform_device * pdev)102 static int mtk_disp_aal_probe(struct platform_device *pdev)
103 {
104 struct device *dev = &pdev->dev;
105 struct mtk_disp_aal *priv;
106 struct resource *res;
107 int ret;
108
109 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
110 if (!priv)
111 return -ENOMEM;
112
113 priv->clk = devm_clk_get(dev, NULL);
114 if (IS_ERR(priv->clk)) {
115 dev_err(dev, "failed to get aal clk\n");
116 return PTR_ERR(priv->clk);
117 }
118
119 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
120 priv->regs = devm_ioremap_resource(dev, res);
121 if (IS_ERR(priv->regs)) {
122 dev_err(dev, "failed to ioremap aal\n");
123 return PTR_ERR(priv->regs);
124 }
125
126 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
127 ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
128 if (ret)
129 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
130 #endif
131
132 priv->data = of_device_get_match_data(dev);
133 platform_set_drvdata(pdev, priv);
134
135 ret = component_add(dev, &mtk_disp_aal_component_ops);
136 if (ret)
137 dev_err(dev, "Failed to add component: %d\n", ret);
138
139 return ret;
140 }
141
mtk_disp_aal_remove(struct platform_device * pdev)142 static int mtk_disp_aal_remove(struct platform_device *pdev)
143 {
144 component_del(&pdev->dev, &mtk_disp_aal_component_ops);
145
146 return 0;
147 }
148
149 static const struct mtk_disp_aal_data mt8173_aal_driver_data = {
150 .has_gamma = true,
151 };
152
153 static const struct of_device_id mtk_disp_aal_driver_dt_match[] = {
154 { .compatible = "mediatek,mt8173-disp-aal",
155 .data = &mt8173_aal_driver_data},
156 { .compatible = "mediatek,mt8183-disp-aal"},
157 {},
158 };
159 MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match);
160
161 struct platform_driver mtk_disp_aal_driver = {
162 .probe = mtk_disp_aal_probe,
163 .remove = mtk_disp_aal_remove,
164 .driver = {
165 .name = "mediatek-disp-aal",
166 .owner = THIS_MODULE,
167 .of_match_table = mtk_disp_aal_driver_dt_match,
168 },
169 };
170