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