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 #include "mtk_drm_drv.h"
18
19 #define DISP_AAL_EN 0x0000
20 #define AAL_EN BIT(0)
21 #define DISP_AAL_SIZE 0x0030
22 #define DISP_AAL_OUTPUT_SIZE 0x04d8
23
24
25 struct mtk_disp_aal_data {
26 bool has_gamma;
27 };
28
29 /**
30 * struct mtk_disp_aal - DISP_AAL driver structure
31 * @ddp_comp - structure containing type enum and hardware resources
32 * @crtc - associated crtc to report irq events to
33 */
34 struct mtk_disp_aal {
35 struct clk *clk;
36 void __iomem *regs;
37 struct cmdq_client_reg cmdq_reg;
38 const struct mtk_disp_aal_data *data;
39 };
40
mtk_aal_clk_enable(struct device * dev)41 int mtk_aal_clk_enable(struct device *dev)
42 {
43 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
44
45 return clk_prepare_enable(aal->clk);
46 }
47
mtk_aal_clk_disable(struct device * dev)48 void mtk_aal_clk_disable(struct device *dev)
49 {
50 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
51
52 clk_disable_unprepare(aal->clk);
53 }
54
mtk_aal_config(struct device * dev,unsigned int w,unsigned int h,unsigned int vrefresh,unsigned int bpc,struct cmdq_pkt * cmdq_pkt)55 void mtk_aal_config(struct device *dev, unsigned int w,
56 unsigned int h, unsigned int vrefresh,
57 unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
58 {
59 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
60
61 mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE);
62 mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE);
63 }
64
mtk_aal_gamma_set(struct device * dev,struct drm_crtc_state * state)65 void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
66 {
67 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
68
69 if (aal->data && aal->data->has_gamma)
70 mtk_gamma_set_common(aal->regs, state, false);
71 }
72
mtk_aal_start(struct device * dev)73 void mtk_aal_start(struct device *dev)
74 {
75 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
76
77 writel(AAL_EN, aal->regs + DISP_AAL_EN);
78 }
79
mtk_aal_stop(struct device * dev)80 void mtk_aal_stop(struct device *dev)
81 {
82 struct mtk_disp_aal *aal = dev_get_drvdata(dev);
83
84 writel_relaxed(0x0, aal->regs + DISP_AAL_EN);
85 }
86
mtk_disp_aal_bind(struct device * dev,struct device * master,void * data)87 static int mtk_disp_aal_bind(struct device *dev, struct device *master,
88 void *data)
89 {
90 return 0;
91 }
92
mtk_disp_aal_unbind(struct device * dev,struct device * master,void * data)93 static void mtk_disp_aal_unbind(struct device *dev, struct device *master,
94 void *data)
95 {
96 }
97
98 static const struct component_ops mtk_disp_aal_component_ops = {
99 .bind = mtk_disp_aal_bind,
100 .unbind = mtk_disp_aal_unbind,
101 };
102
mtk_disp_aal_probe(struct platform_device * pdev)103 static int mtk_disp_aal_probe(struct platform_device *pdev)
104 {
105 struct device *dev = &pdev->dev;
106 struct mtk_disp_aal *priv;
107 struct resource *res;
108 int ret;
109
110 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
111 if (!priv)
112 return -ENOMEM;
113
114 priv->clk = devm_clk_get(dev, NULL);
115 if (IS_ERR(priv->clk)) {
116 dev_err(dev, "failed to get aal clk\n");
117 return PTR_ERR(priv->clk);
118 }
119
120 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
121 priv->regs = devm_ioremap_resource(dev, res);
122 if (IS_ERR(priv->regs)) {
123 dev_err(dev, "failed to ioremap aal\n");
124 return PTR_ERR(priv->regs);
125 }
126
127 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
128 ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
129 if (ret)
130 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
131 #endif
132
133 priv->data = of_device_get_match_data(dev);
134 platform_set_drvdata(pdev, priv);
135
136 ret = component_add(dev, &mtk_disp_aal_component_ops);
137 if (ret)
138 dev_err(dev, "Failed to add component: %d\n", ret);
139
140 return ret;
141 }
142
mtk_disp_aal_remove(struct platform_device * pdev)143 static int mtk_disp_aal_remove(struct platform_device *pdev)
144 {
145 component_del(&pdev->dev, &mtk_disp_aal_component_ops);
146
147 return 0;
148 }
149
150 static const struct mtk_disp_aal_data mt8173_aal_driver_data = {
151 .has_gamma = true,
152 };
153
154 static const struct of_device_id mtk_disp_aal_driver_dt_match[] = {
155 { .compatible = "mediatek,mt8173-disp-aal",
156 .data = &mt8173_aal_driver_data},
157 { .compatible = "mediatek,mt8183-disp-aal"},
158 {},
159 };
160 MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match);
161
162 struct platform_driver mtk_disp_aal_driver = {
163 .probe = mtk_disp_aal_probe,
164 .remove = mtk_disp_aal_remove,
165 .driver = {
166 .name = "mediatek-disp-aal",
167 .owner = THIS_MODULE,
168 .of_match_table = mtk_disp_aal_driver_dt_match,
169 },
170 };
171