1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2015, The Linux Foundation. All rights reserved. 4 */ 5 6 #include "dsi.h" 7 8 bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi) 9 { 10 unsigned long host_flags = msm_dsi_host_get_mode_flags(msm_dsi->host); 11 12 return !(host_flags & MIPI_DSI_MODE_VIDEO); 13 } 14 15 struct drm_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi) 16 { 17 return msm_dsi_host_get_dsc_config(msm_dsi->host); 18 } 19 20 bool msm_dsi_wide_bus_enabled(struct msm_dsi *msm_dsi) 21 { 22 return msm_dsi_host_is_wide_bus_enabled(msm_dsi->host); 23 } 24 25 static int dsi_get_phy(struct msm_dsi *msm_dsi) 26 { 27 struct platform_device *pdev = msm_dsi->pdev; 28 struct platform_device *phy_pdev; 29 struct device_node *phy_node; 30 31 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0); 32 if (!phy_node) { 33 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n"); 34 return -ENXIO; 35 } 36 37 phy_pdev = of_find_device_by_node(phy_node); 38 if (phy_pdev) { 39 msm_dsi->phy = platform_get_drvdata(phy_pdev); 40 msm_dsi->phy_dev = &phy_pdev->dev; 41 } 42 43 of_node_put(phy_node); 44 45 if (!phy_pdev) { 46 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__); 47 return -EPROBE_DEFER; 48 } 49 if (!msm_dsi->phy) { 50 put_device(&phy_pdev->dev); 51 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__); 52 return -EPROBE_DEFER; 53 } 54 55 return 0; 56 } 57 58 static void dsi_destroy(struct msm_dsi *msm_dsi) 59 { 60 if (!msm_dsi) 61 return; 62 63 msm_dsi_manager_unregister(msm_dsi); 64 65 if (msm_dsi->phy_dev) { 66 put_device(msm_dsi->phy_dev); 67 msm_dsi->phy = NULL; 68 msm_dsi->phy_dev = NULL; 69 } 70 71 if (msm_dsi->host) { 72 msm_dsi_host_destroy(msm_dsi->host); 73 msm_dsi->host = NULL; 74 } 75 76 platform_set_drvdata(msm_dsi->pdev, NULL); 77 } 78 79 static struct msm_dsi *dsi_init(struct platform_device *pdev) 80 { 81 struct msm_dsi *msm_dsi; 82 int ret; 83 84 if (!pdev) 85 return ERR_PTR(-ENXIO); 86 87 msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL); 88 if (!msm_dsi) 89 return ERR_PTR(-ENOMEM); 90 DBG("dsi probed=%p", msm_dsi); 91 92 msm_dsi->id = -1; 93 msm_dsi->pdev = pdev; 94 platform_set_drvdata(pdev, msm_dsi); 95 96 /* Init dsi host */ 97 ret = msm_dsi_host_init(msm_dsi); 98 if (ret) 99 goto destroy_dsi; 100 101 /* GET dsi PHY */ 102 ret = dsi_get_phy(msm_dsi); 103 if (ret) 104 goto destroy_dsi; 105 106 /* Register to dsi manager */ 107 ret = msm_dsi_manager_register(msm_dsi); 108 if (ret) 109 goto destroy_dsi; 110 111 return msm_dsi; 112 113 destroy_dsi: 114 dsi_destroy(msm_dsi); 115 return ERR_PTR(ret); 116 } 117 118 static int dsi_bind(struct device *dev, struct device *master, void *data) 119 { 120 struct msm_drm_private *priv = dev_get_drvdata(master); 121 struct msm_dsi *msm_dsi = dev_get_drvdata(dev); 122 123 priv->dsi[msm_dsi->id] = msm_dsi; 124 125 return 0; 126 } 127 128 static void dsi_unbind(struct device *dev, struct device *master, 129 void *data) 130 { 131 struct msm_drm_private *priv = dev_get_drvdata(master); 132 struct msm_dsi *msm_dsi = dev_get_drvdata(dev); 133 134 priv->dsi[msm_dsi->id] = NULL; 135 } 136 137 static const struct component_ops dsi_ops = { 138 .bind = dsi_bind, 139 .unbind = dsi_unbind, 140 }; 141 142 int dsi_dev_attach(struct platform_device *pdev) 143 { 144 return component_add(&pdev->dev, &dsi_ops); 145 } 146 147 void dsi_dev_detach(struct platform_device *pdev) 148 { 149 component_del(&pdev->dev, &dsi_ops); 150 } 151 152 static int dsi_dev_probe(struct platform_device *pdev) 153 { 154 struct msm_dsi *msm_dsi; 155 156 DBG(""); 157 msm_dsi = dsi_init(pdev); 158 if (IS_ERR(msm_dsi)) { 159 /* Don't fail the bind if the dsi port is not connected */ 160 if (PTR_ERR(msm_dsi) == -ENODEV) 161 return 0; 162 else 163 return PTR_ERR(msm_dsi); 164 } 165 166 return 0; 167 } 168 169 static int dsi_dev_remove(struct platform_device *pdev) 170 { 171 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev); 172 173 DBG(""); 174 dsi_destroy(msm_dsi); 175 176 return 0; 177 } 178 179 static const struct of_device_id dt_match[] = { 180 { .compatible = "qcom,mdss-dsi-ctrl" }, 181 182 /* Deprecated, don't use */ 183 { .compatible = "qcom,dsi-ctrl-6g-qcm2290" }, 184 {} 185 }; 186 187 static const struct dev_pm_ops dsi_pm_ops = { 188 SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL) 189 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 190 pm_runtime_force_resume) 191 }; 192 193 static struct platform_driver dsi_driver = { 194 .probe = dsi_dev_probe, 195 .remove = dsi_dev_remove, 196 .driver = { 197 .name = "msm_dsi", 198 .of_match_table = dt_match, 199 .pm = &dsi_pm_ops, 200 }, 201 }; 202 203 void __init msm_dsi_register(void) 204 { 205 DBG(""); 206 msm_dsi_phy_driver_register(); 207 platform_driver_register(&dsi_driver); 208 } 209 210 void __exit msm_dsi_unregister(void) 211 { 212 DBG(""); 213 msm_dsi_phy_driver_unregister(); 214 platform_driver_unregister(&dsi_driver); 215 } 216 217 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev, 218 struct drm_encoder *encoder) 219 { 220 int ret; 221 222 msm_dsi->dev = dev; 223 224 ret = msm_dsi_host_modeset_init(msm_dsi->host, dev); 225 if (ret) { 226 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret); 227 return ret; 228 } 229 230 if (msm_dsi_is_bonded_dsi(msm_dsi) && 231 !msm_dsi_is_master_dsi(msm_dsi)) { 232 /* 233 * Do not return an eror here, 234 * Just skip creating encoder/connector for the slave-DSI. 235 */ 236 return 0; 237 } 238 239 msm_dsi->encoder = encoder; 240 241 ret = msm_dsi_manager_bridge_init(msm_dsi); 242 if (ret) { 243 DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret); 244 return ret; 245 } 246 247 ret = msm_dsi_manager_ext_bridge_init(msm_dsi->id); 248 if (ret) { 249 DRM_DEV_ERROR(dev->dev, 250 "failed to create dsi connector: %d\n", ret); 251 return ret; 252 } 253 254 return 0; 255 } 256 257 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi) 258 { 259 msm_dsi_host_snapshot(disp_state, msm_dsi->host); 260 msm_dsi_phy_snapshot(disp_state, msm_dsi->phy); 261 } 262 263