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 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 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 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 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 } 100 101 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 } 108 109 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 /* 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 } 133 134 static 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, 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(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, 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, phy); 176 177 return 0; 178 } 179 180 static void msm_hdmi_phy_remove(struct platform_device *pdev) 181 { 182 pm_runtime_disable(&pdev->dev); 183 } 184 185 static 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 }; 198 199 static 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 }; 207 208 void __init msm_hdmi_phy_driver_register(void) 209 { 210 platform_driver_register(&msm_hdmi_phy_platform_driver); 211 } 212 213 void __exit msm_hdmi_phy_driver_unregister(void) 214 { 215 platform_driver_unregister(&msm_hdmi_phy_platform_driver); 216 } 217