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 struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi) 9 { 10 if (!msm_dsi || !msm_dsi_device_connected(msm_dsi)) 11 return NULL; 12 13 return msm_dsi->encoder; 14 } 15 16 static int dsi_get_phy(struct msm_dsi *msm_dsi) 17 { 18 struct platform_device *pdev = msm_dsi->pdev; 19 struct platform_device *phy_pdev; 20 struct device_node *phy_node; 21 22 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0); 23 if (!phy_node) { 24 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n"); 25 return -ENXIO; 26 } 27 28 phy_pdev = of_find_device_by_node(phy_node); 29 if (phy_pdev) 30 msm_dsi->phy = platform_get_drvdata(phy_pdev); 31 32 of_node_put(phy_node); 33 34 if (!phy_pdev || !msm_dsi->phy) { 35 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__); 36 return -EPROBE_DEFER; 37 } 38 39 msm_dsi->phy_dev = get_device(&phy_pdev->dev); 40 41 return 0; 42 } 43 44 static void dsi_destroy(struct msm_dsi *msm_dsi) 45 { 46 if (!msm_dsi) 47 return; 48 49 msm_dsi_manager_unregister(msm_dsi); 50 51 if (msm_dsi->phy_dev) { 52 put_device(msm_dsi->phy_dev); 53 msm_dsi->phy = NULL; 54 msm_dsi->phy_dev = NULL; 55 } 56 57 if (msm_dsi->host) { 58 msm_dsi_host_destroy(msm_dsi->host); 59 msm_dsi->host = NULL; 60 } 61 62 platform_set_drvdata(msm_dsi->pdev, NULL); 63 } 64 65 static struct msm_dsi *dsi_init(struct platform_device *pdev) 66 { 67 struct msm_dsi *msm_dsi; 68 int ret; 69 70 if (!pdev) 71 return ERR_PTR(-ENXIO); 72 73 msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL); 74 if (!msm_dsi) 75 return ERR_PTR(-ENOMEM); 76 DBG("dsi probed=%p", msm_dsi); 77 78 msm_dsi->id = -1; 79 msm_dsi->pdev = pdev; 80 platform_set_drvdata(pdev, msm_dsi); 81 82 /* Init dsi host */ 83 ret = msm_dsi_host_init(msm_dsi); 84 if (ret) 85 goto destroy_dsi; 86 87 /* GET dsi PHY */ 88 ret = dsi_get_phy(msm_dsi); 89 if (ret) 90 goto destroy_dsi; 91 92 /* Register to dsi manager */ 93 ret = msm_dsi_manager_register(msm_dsi); 94 if (ret) 95 goto destroy_dsi; 96 97 return msm_dsi; 98 99 destroy_dsi: 100 dsi_destroy(msm_dsi); 101 return ERR_PTR(ret); 102 } 103 104 static int dsi_bind(struct device *dev, struct device *master, void *data) 105 { 106 struct drm_device *drm = dev_get_drvdata(master); 107 struct msm_drm_private *priv = drm->dev_private; 108 struct platform_device *pdev = to_platform_device(dev); 109 struct msm_dsi *msm_dsi; 110 111 DBG(""); 112 msm_dsi = dsi_init(pdev); 113 if (IS_ERR(msm_dsi)) { 114 /* Don't fail the bind if the dsi port is not connected */ 115 if (PTR_ERR(msm_dsi) == -ENODEV) 116 return 0; 117 else 118 return PTR_ERR(msm_dsi); 119 } 120 121 priv->dsi[msm_dsi->id] = msm_dsi; 122 123 return 0; 124 } 125 126 static void dsi_unbind(struct device *dev, struct device *master, 127 void *data) 128 { 129 struct drm_device *drm = dev_get_drvdata(master); 130 struct msm_drm_private *priv = drm->dev_private; 131 struct msm_dsi *msm_dsi = dev_get_drvdata(dev); 132 int id = msm_dsi->id; 133 134 if (priv->dsi[id]) { 135 dsi_destroy(msm_dsi); 136 priv->dsi[id] = NULL; 137 } 138 } 139 140 static const struct component_ops dsi_ops = { 141 .bind = dsi_bind, 142 .unbind = dsi_unbind, 143 }; 144 145 static int dsi_dev_probe(struct platform_device *pdev) 146 { 147 return component_add(&pdev->dev, &dsi_ops); 148 } 149 150 static int dsi_dev_remove(struct platform_device *pdev) 151 { 152 DBG(""); 153 component_del(&pdev->dev, &dsi_ops); 154 return 0; 155 } 156 157 static const struct of_device_id dt_match[] = { 158 { .compatible = "qcom,mdss-dsi-ctrl" }, 159 {} 160 }; 161 162 static const struct dev_pm_ops dsi_pm_ops = { 163 SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL) 164 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 165 pm_runtime_force_resume) 166 }; 167 168 static struct platform_driver dsi_driver = { 169 .probe = dsi_dev_probe, 170 .remove = dsi_dev_remove, 171 .driver = { 172 .name = "msm_dsi", 173 .of_match_table = dt_match, 174 .pm = &dsi_pm_ops, 175 }, 176 }; 177 178 void __init msm_dsi_register(void) 179 { 180 DBG(""); 181 msm_dsi_phy_driver_register(); 182 platform_driver_register(&dsi_driver); 183 } 184 185 void __exit msm_dsi_unregister(void) 186 { 187 DBG(""); 188 msm_dsi_phy_driver_unregister(); 189 platform_driver_unregister(&dsi_driver); 190 } 191 192 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev, 193 struct drm_encoder *encoder) 194 { 195 struct msm_drm_private *priv; 196 struct drm_bridge *ext_bridge; 197 int ret; 198 199 if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev)) 200 return -EINVAL; 201 202 priv = dev->dev_private; 203 msm_dsi->dev = dev; 204 205 ret = msm_dsi_host_modeset_init(msm_dsi->host, dev); 206 if (ret) { 207 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret); 208 goto fail; 209 } 210 211 if (!msm_dsi_manager_validate_current_config(msm_dsi->id)) 212 goto fail; 213 214 msm_dsi->encoder = encoder; 215 216 msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id); 217 if (IS_ERR(msm_dsi->bridge)) { 218 ret = PTR_ERR(msm_dsi->bridge); 219 DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret); 220 msm_dsi->bridge = NULL; 221 goto fail; 222 } 223 224 /* 225 * check if the dsi encoder output is connected to a panel or an 226 * external bridge. We create a connector only if we're connected to a 227 * drm_panel device. When we're connected to an external bridge, we 228 * assume that the drm_bridge driver will create the connector itself. 229 */ 230 ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host); 231 232 if (ext_bridge) 233 msm_dsi->connector = 234 msm_dsi_manager_ext_bridge_init(msm_dsi->id); 235 else 236 msm_dsi->connector = 237 msm_dsi_manager_connector_init(msm_dsi->id); 238 239 if (IS_ERR(msm_dsi->connector)) { 240 ret = PTR_ERR(msm_dsi->connector); 241 DRM_DEV_ERROR(dev->dev, 242 "failed to create dsi connector: %d\n", ret); 243 msm_dsi->connector = NULL; 244 goto fail; 245 } 246 247 msm_dsi_manager_setup_encoder(msm_dsi->id); 248 249 priv->bridges[priv->num_bridges++] = msm_dsi->bridge; 250 priv->connectors[priv->num_connectors++] = msm_dsi->connector; 251 252 return 0; 253 fail: 254 /* bridge/connector are normally destroyed by drm: */ 255 if (msm_dsi->bridge) { 256 msm_dsi_manager_bridge_destroy(msm_dsi->bridge); 257 msm_dsi->bridge = NULL; 258 } 259 260 /* don't destroy connector if we didn't make it */ 261 if (msm_dsi->connector && !msm_dsi->external_bridge) 262 msm_dsi->connector->funcs->destroy(msm_dsi->connector); 263 264 msm_dsi->connector = NULL; 265 266 return ret; 267 } 268 269 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi) 270 { 271 msm_dsi_host_snapshot(disp_state, msm_dsi->host); 272 msm_dsi_phy_snapshot(disp_state, msm_dsi->phy); 273 } 274 275