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 bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi) 17 { 18 unsigned long host_flags = msm_dsi_host_get_mode_flags(msm_dsi->host); 19 20 return !(host_flags & MIPI_DSI_MODE_VIDEO); 21 } 22 23 static int dsi_get_phy(struct msm_dsi *msm_dsi) 24 { 25 struct platform_device *pdev = msm_dsi->pdev; 26 struct platform_device *phy_pdev; 27 struct device_node *phy_node; 28 29 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0); 30 if (!phy_node) { 31 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n"); 32 return -ENXIO; 33 } 34 35 phy_pdev = of_find_device_by_node(phy_node); 36 if (phy_pdev) { 37 msm_dsi->phy = platform_get_drvdata(phy_pdev); 38 msm_dsi->phy_dev = &phy_pdev->dev; 39 } 40 41 of_node_put(phy_node); 42 43 if (!phy_pdev) { 44 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__); 45 return -EPROBE_DEFER; 46 } 47 if (!msm_dsi->phy) { 48 put_device(&phy_pdev->dev); 49 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__); 50 return -EPROBE_DEFER; 51 } 52 53 return 0; 54 } 55 56 static void dsi_destroy(struct msm_dsi *msm_dsi) 57 { 58 if (!msm_dsi) 59 return; 60 61 msm_dsi_manager_unregister(msm_dsi); 62 63 if (msm_dsi->phy_dev) { 64 put_device(msm_dsi->phy_dev); 65 msm_dsi->phy = NULL; 66 msm_dsi->phy_dev = NULL; 67 } 68 69 if (msm_dsi->host) { 70 msm_dsi_host_destroy(msm_dsi->host); 71 msm_dsi->host = NULL; 72 } 73 74 platform_set_drvdata(msm_dsi->pdev, NULL); 75 } 76 77 static struct msm_dsi *dsi_init(struct platform_device *pdev) 78 { 79 struct msm_dsi *msm_dsi; 80 int ret; 81 82 if (!pdev) 83 return ERR_PTR(-ENXIO); 84 85 msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL); 86 if (!msm_dsi) 87 return ERR_PTR(-ENOMEM); 88 DBG("dsi probed=%p", msm_dsi); 89 90 msm_dsi->id = -1; 91 msm_dsi->pdev = pdev; 92 platform_set_drvdata(pdev, msm_dsi); 93 94 /* Init dsi host */ 95 ret = msm_dsi_host_init(msm_dsi); 96 if (ret) 97 goto destroy_dsi; 98 99 /* GET dsi PHY */ 100 ret = dsi_get_phy(msm_dsi); 101 if (ret) 102 goto destroy_dsi; 103 104 /* Register to dsi manager */ 105 ret = msm_dsi_manager_register(msm_dsi); 106 if (ret) 107 goto destroy_dsi; 108 109 return msm_dsi; 110 111 destroy_dsi: 112 dsi_destroy(msm_dsi); 113 return ERR_PTR(ret); 114 } 115 116 static int dsi_bind(struct device *dev, struct device *master, void *data) 117 { 118 struct msm_drm_private *priv = dev_get_drvdata(master); 119 struct msm_dsi *msm_dsi = dev_get_drvdata(dev); 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 msm_drm_private *priv = dev_get_drvdata(master); 130 struct msm_dsi *msm_dsi = dev_get_drvdata(dev); 131 132 priv->dsi[msm_dsi->id] = NULL; 133 } 134 135 static const struct component_ops dsi_ops = { 136 .bind = dsi_bind, 137 .unbind = dsi_unbind, 138 }; 139 140 int dsi_dev_attach(struct platform_device *pdev) 141 { 142 return component_add(&pdev->dev, &dsi_ops); 143 } 144 145 void dsi_dev_detach(struct platform_device *pdev) 146 { 147 component_del(&pdev->dev, &dsi_ops); 148 } 149 150 static int dsi_dev_probe(struct platform_device *pdev) 151 { 152 struct msm_dsi *msm_dsi; 153 154 DBG(""); 155 msm_dsi = dsi_init(pdev); 156 if (IS_ERR(msm_dsi)) { 157 /* Don't fail the bind if the dsi port is not connected */ 158 if (PTR_ERR(msm_dsi) == -ENODEV) 159 return 0; 160 else 161 return PTR_ERR(msm_dsi); 162 } 163 164 return 0; 165 } 166 167 static int dsi_dev_remove(struct platform_device *pdev) 168 { 169 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev); 170 171 DBG(""); 172 dsi_destroy(msm_dsi); 173 174 return 0; 175 } 176 177 static const struct of_device_id dt_match[] = { 178 { .compatible = "qcom,mdss-dsi-ctrl" }, 179 {} 180 }; 181 182 static const struct dev_pm_ops dsi_pm_ops = { 183 SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL) 184 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 185 pm_runtime_force_resume) 186 }; 187 188 static struct platform_driver dsi_driver = { 189 .probe = dsi_dev_probe, 190 .remove = dsi_dev_remove, 191 .driver = { 192 .name = "msm_dsi", 193 .of_match_table = dt_match, 194 .pm = &dsi_pm_ops, 195 }, 196 }; 197 198 void __init msm_dsi_register(void) 199 { 200 DBG(""); 201 msm_dsi_phy_driver_register(); 202 platform_driver_register(&dsi_driver); 203 } 204 205 void __exit msm_dsi_unregister(void) 206 { 207 DBG(""); 208 msm_dsi_phy_driver_unregister(); 209 platform_driver_unregister(&dsi_driver); 210 } 211 212 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev, 213 struct drm_encoder *encoder) 214 { 215 struct msm_drm_private *priv; 216 struct drm_bridge *ext_bridge; 217 int ret; 218 219 if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev)) 220 return -EINVAL; 221 222 priv = dev->dev_private; 223 msm_dsi->dev = dev; 224 225 ret = msm_dsi_host_modeset_init(msm_dsi->host, dev); 226 if (ret) { 227 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret); 228 goto fail; 229 } 230 231 if (msm_dsi_is_bonded_dsi(msm_dsi) && 232 !msm_dsi_is_master_dsi(msm_dsi)) { 233 /* 234 * Do not return an eror here, 235 * Just skip creating encoder/connector for the slave-DSI. 236 */ 237 return 0; 238 } 239 240 msm_dsi->encoder = encoder; 241 242 msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id); 243 if (IS_ERR(msm_dsi->bridge)) { 244 ret = PTR_ERR(msm_dsi->bridge); 245 DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret); 246 msm_dsi->bridge = NULL; 247 goto fail; 248 } 249 250 /* 251 * check if the dsi encoder output is connected to a panel or an 252 * external bridge. We create a connector only if we're connected to a 253 * drm_panel device. When we're connected to an external bridge, we 254 * assume that the drm_bridge driver will create the connector itself. 255 */ 256 ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host); 257 258 if (ext_bridge) 259 msm_dsi->connector = 260 msm_dsi_manager_ext_bridge_init(msm_dsi->id); 261 else 262 msm_dsi->connector = 263 msm_dsi_manager_connector_init(msm_dsi->id); 264 265 if (IS_ERR(msm_dsi->connector)) { 266 ret = PTR_ERR(msm_dsi->connector); 267 DRM_DEV_ERROR(dev->dev, 268 "failed to create dsi connector: %d\n", ret); 269 msm_dsi->connector = NULL; 270 goto fail; 271 } 272 273 priv->bridges[priv->num_bridges++] = msm_dsi->bridge; 274 priv->connectors[priv->num_connectors++] = msm_dsi->connector; 275 276 return 0; 277 fail: 278 /* bridge/connector are normally destroyed by drm: */ 279 if (msm_dsi->bridge) { 280 msm_dsi_manager_bridge_destroy(msm_dsi->bridge); 281 msm_dsi->bridge = NULL; 282 } 283 284 /* don't destroy connector if we didn't make it */ 285 if (msm_dsi->connector && !msm_dsi->external_bridge) 286 msm_dsi->connector->funcs->destroy(msm_dsi->connector); 287 288 msm_dsi->connector = NULL; 289 290 return ret; 291 } 292 293 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi) 294 { 295 msm_dsi_host_snapshot(disp_state, msm_dsi->host); 296 msm_dsi_phy_snapshot(disp_state, msm_dsi->phy); 297 } 298 299