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
msm_hdmi_phy_resource_init(struct hdmi_phy * phy)11 static 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, cfg->num_regs, sizeof(phy->regs[0]),
18 GFP_KERNEL);
19 if (!phy->regs)
20 return -ENOMEM;
21
22 phy->clks = devm_kcalloc(dev, cfg->num_clks, 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, cfg->num_regs, 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(clk)) {
43 ret = PTR_ERR(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
msm_hdmi_phy_resource_enable(struct hdmi_phy * phy)55 int 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(cfg->num_regs, 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(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
msm_hdmi_phy_resource_disable(struct hdmi_phy * phy)79 void 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(phy->clks[i]);
87
88 regulator_bulk_disable(cfg->num_regs, phy->regs);
89
90 pm_runtime_put_sync(dev);
91 }
92
msm_hdmi_phy_powerup(struct hdmi_phy * phy,unsigned long int pixclock)93 void 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
msm_hdmi_phy_powerdown(struct hdmi_phy * phy)101 void 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
msm_hdmi_phy_pll_init(struct platform_device * pdev,enum hdmi_phy_type type)109 static 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 case MSM_HDMI_PHY_8998:
122 ret = msm_hdmi_pll_8998_init(pdev);
123 break;
124 /*
125 * we don't have PLL support for these, don't report an error for now
126 */
127 case MSM_HDMI_PHY_8x60:
128 case MSM_HDMI_PHY_8x74:
129 default:
130 ret = 0;
131 break;
132 }
133
134 return ret;
135 }
136
msm_hdmi_phy_probe(struct platform_device * pdev)137 static int msm_hdmi_phy_probe(struct platform_device *pdev)
138 {
139 struct device *dev = &pdev->dev;
140 struct hdmi_phy *phy;
141 int ret;
142
143 phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
144 if (!phy)
145 return -ENODEV;
146
147 phy->cfg = (struct hdmi_phy_cfg *)of_device_get_match_data(dev);
148 if (!phy->cfg)
149 return -ENODEV;
150
151 phy->mmio = msm_ioremap(pdev, "hdmi_phy");
152 if (IS_ERR(phy->mmio)) {
153 DRM_DEV_ERROR(dev, "%s: failed to map phy base\n", __func__);
154 return -ENOMEM;
155 }
156
157 phy->pdev = pdev;
158
159 ret = msm_hdmi_phy_resource_init(phy);
160 if (ret)
161 return ret;
162
163 pm_runtime_enable(&pdev->dev);
164
165 ret = msm_hdmi_phy_resource_enable(phy);
166 if (ret)
167 return ret;
168
169 ret = msm_hdmi_phy_pll_init(pdev, phy->cfg->type);
170 if (ret) {
171 DRM_DEV_ERROR(dev, "couldn't init PLL\n");
172 msm_hdmi_phy_resource_disable(phy);
173 return ret;
174 }
175
176 msm_hdmi_phy_resource_disable(phy);
177
178 platform_set_drvdata(pdev, phy);
179
180 return 0;
181 }
182
msm_hdmi_phy_remove(struct platform_device * pdev)183 static void msm_hdmi_phy_remove(struct platform_device *pdev)
184 {
185 pm_runtime_disable(&pdev->dev);
186 }
187
188 static const struct of_device_id msm_hdmi_phy_dt_match[] = {
189 { .compatible = "qcom,hdmi-phy-8660",
190 .data = &msm_hdmi_phy_8x60_cfg },
191 { .compatible = "qcom,hdmi-phy-8960",
192 .data = &msm_hdmi_phy_8960_cfg },
193 { .compatible = "qcom,hdmi-phy-8974",
194 .data = &msm_hdmi_phy_8x74_cfg },
195 { .compatible = "qcom,hdmi-phy-8084",
196 .data = &msm_hdmi_phy_8x74_cfg },
197 { .compatible = "qcom,hdmi-phy-8996",
198 .data = &msm_hdmi_phy_8996_cfg },
199 { .compatible = "qcom,hdmi-phy-8998",
200 .data = &msm_hdmi_phy_8998_cfg },
201 {}
202 };
203
204 static struct platform_driver msm_hdmi_phy_platform_driver = {
205 .probe = msm_hdmi_phy_probe,
206 .remove = msm_hdmi_phy_remove,
207 .driver = {
208 .name = "msm_hdmi_phy",
209 .of_match_table = msm_hdmi_phy_dt_match,
210 },
211 };
212
msm_hdmi_phy_driver_register(void)213 void __init msm_hdmi_phy_driver_register(void)
214 {
215 platform_driver_register(&msm_hdmi_phy_platform_driver);
216 }
217
msm_hdmi_phy_driver_unregister(void)218 void __exit msm_hdmi_phy_driver_unregister(void)
219 {
220 platform_driver_unregister(&msm_hdmi_phy_platform_driver);
221 }
222