1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2016, The Linux Foundation. All rights reserved.
4 */
5
6#include <linux/of.h>
7#include <linux/platform_device.h>
8
9#include "hdmi.h"
10
11static int msm_hdmi_phy_resource_init(struct hdmi_phy *phy)
12{
13 struct hdmi_phy_cfg *cfg = phy->cfg;
14 struct device *dev = &phy->pdev->dev;
15 int i, ret;
16
17 phy->regs = devm_kcalloc(dev, n: cfg->num_regs, size: sizeof(phy->regs[0]),
18 GFP_KERNEL);
19 if (!phy->regs)
20 return -ENOMEM;
21
22 phy->clks = devm_kcalloc(dev, n: cfg->num_clks, size: sizeof(phy->clks[0]),
23 GFP_KERNEL);
24 if (!phy->clks)
25 return -ENOMEM;
26
27 for (i = 0; i < cfg->num_regs; i++)
28 phy->regs[i].supply = cfg->reg_names[i];
29
30 ret = devm_regulator_bulk_get(dev, num_consumers: cfg->num_regs, consumers: phy->regs);
31 if (ret) {
32 if (ret != -EPROBE_DEFER)
33 DRM_DEV_ERROR(dev, "failed to get phy regulators: %d\n", ret);
34
35 return ret;
36 }
37
38 for (i = 0; i < cfg->num_clks; i++) {
39 struct clk *clk;
40
41 clk = msm_clk_get(phy->pdev, cfg->clk_names[i]);
42 if (IS_ERR(ptr: clk)) {
43 ret = PTR_ERR(ptr: clk);
44 DRM_DEV_ERROR(dev, "failed to get phy clock: %s (%d)\n",
45 cfg->clk_names[i], ret);
46 return ret;
47 }
48
49 phy->clks[i] = clk;
50 }
51
52 return 0;
53}
54
55int msm_hdmi_phy_resource_enable(struct hdmi_phy *phy)
56{
57 struct hdmi_phy_cfg *cfg = phy->cfg;
58 struct device *dev = &phy->pdev->dev;
59 int i, ret = 0;
60
61 pm_runtime_get_sync(dev);
62
63 ret = regulator_bulk_enable(num_consumers: cfg->num_regs, consumers: phy->regs);
64 if (ret) {
65 DRM_DEV_ERROR(dev, "failed to enable regulators: (%d)\n", ret);
66 return ret;
67 }
68
69 for (i = 0; i < cfg->num_clks; i++) {
70 ret = clk_prepare_enable(clk: phy->clks[i]);
71 if (ret)
72 DRM_DEV_ERROR(dev, "failed to enable clock: %s (%d)\n",
73 cfg->clk_names[i], ret);
74 }
75
76 return ret;
77}
78
79void msm_hdmi_phy_resource_disable(struct hdmi_phy *phy)
80{
81 struct hdmi_phy_cfg *cfg = phy->cfg;
82 struct device *dev = &phy->pdev->dev;
83 int i;
84
85 for (i = cfg->num_clks - 1; i >= 0; i--)
86 clk_disable_unprepare(clk: phy->clks[i]);
87
88 regulator_bulk_disable(num_consumers: cfg->num_regs, consumers: phy->regs);
89
90 pm_runtime_put_sync(dev);
91}
92
93void msm_hdmi_phy_powerup(struct hdmi_phy *phy, unsigned long int pixclock)
94{
95 if (!phy || !phy->cfg->powerup)
96 return;
97
98 phy->cfg->powerup(phy, pixclock);
99}
100
101void msm_hdmi_phy_powerdown(struct hdmi_phy *phy)
102{
103 if (!phy || !phy->cfg->powerdown)
104 return;
105
106 phy->cfg->powerdown(phy);
107}
108
109static int msm_hdmi_phy_pll_init(struct platform_device *pdev,
110 enum hdmi_phy_type type)
111{
112 int ret;
113
114 switch (type) {
115 case MSM_HDMI_PHY_8960:
116 ret = msm_hdmi_pll_8960_init(pdev);
117 break;
118 case MSM_HDMI_PHY_8996:
119 ret = msm_hdmi_pll_8996_init(pdev);
120 break;
121 /*
122 * we don't have PLL support for these, don't report an error for now
123 */
124 case MSM_HDMI_PHY_8x60:
125 case MSM_HDMI_PHY_8x74:
126 default:
127 ret = 0;
128 break;
129 }
130
131 return ret;
132}
133
134static int msm_hdmi_phy_probe(struct platform_device *pdev)
135{
136 struct device *dev = &pdev->dev;
137 struct hdmi_phy *phy;
138 int ret;
139
140 phy = devm_kzalloc(dev, size: sizeof(*phy), GFP_KERNEL);
141 if (!phy)
142 return -ENODEV;
143
144 phy->cfg = (struct hdmi_phy_cfg *)of_device_get_match_data(dev);
145 if (!phy->cfg)
146 return -ENODEV;
147
148 phy->mmio = msm_ioremap(pdev, "hdmi_phy");
149 if (IS_ERR(ptr: phy->mmio)) {
150 DRM_DEV_ERROR(dev, "%s: failed to map phy base\n", __func__);
151 return -ENOMEM;
152 }
153
154 phy->pdev = pdev;
155
156 ret = msm_hdmi_phy_resource_init(phy);
157 if (ret)
158 return ret;
159
160 pm_runtime_enable(&pdev->dev);
161
162 ret = msm_hdmi_phy_resource_enable(phy);
163 if (ret)
164 return ret;
165
166 ret = msm_hdmi_phy_pll_init(pdev, type: phy->cfg->type);
167 if (ret) {
168 DRM_DEV_ERROR(dev, "couldn't init PLL\n");
169 msm_hdmi_phy_resource_disable(phy);
170 return ret;
171 }
172
173 msm_hdmi_phy_resource_disable(phy);
174
175 platform_set_drvdata(pdev, data: phy);
176
177 return 0;
178}
179
180static void msm_hdmi_phy_remove(struct platform_device *pdev)
181{
182 pm_runtime_disable(&pdev->dev);
183}
184
185static const struct of_device_id msm_hdmi_phy_dt_match[] = {
186 { .compatible = "qcom,hdmi-phy-8660",
187 .data = &msm_hdmi_phy_8x60_cfg },
188 { .compatible = "qcom,hdmi-phy-8960",
189 .data = &msm_hdmi_phy_8960_cfg },
190 { .compatible = "qcom,hdmi-phy-8974",
191 .data = &msm_hdmi_phy_8x74_cfg },
192 { .compatible = "qcom,hdmi-phy-8084",
193 .data = &msm_hdmi_phy_8x74_cfg },
194 { .compatible = "qcom,hdmi-phy-8996",
195 .data = &msm_hdmi_phy_8996_cfg },
196 {}
197};
198
199static struct platform_driver msm_hdmi_phy_platform_driver = {
200 .probe = msm_hdmi_phy_probe,
201 .remove_new = msm_hdmi_phy_remove,
202 .driver = {
203 .name = "msm_hdmi_phy",
204 .of_match_table = msm_hdmi_phy_dt_match,
205 },
206};
207
208void __init msm_hdmi_phy_driver_register(void)
209{
210 platform_driver_register(&msm_hdmi_phy_platform_driver);
211}
212
213void __exit msm_hdmi_phy_driver_unregister(void)
214{
215 platform_driver_unregister(&msm_hdmi_phy_platform_driver);
216}
217

source code of linux/drivers/gpu/drm/msm/hdmi/hdmi_phy.c