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 #include "dsi_cfg.h" 8 9 struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi) 10 { 11 if (!msm_dsi || !msm_dsi_device_connected(msm_dsi)) 12 return NULL; 13 14 return msm_dsi->encoder; 15 } 16 17 bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi) 18 { 19 unsigned long host_flags = msm_dsi_host_get_mode_flags(msm_dsi->host); 20 21 return !(host_flags & MIPI_DSI_MODE_VIDEO); 22 } 23 24 static int dsi_get_phy(struct msm_dsi *msm_dsi) 25 { 26 struct platform_device *pdev = msm_dsi->pdev; 27 struct platform_device *phy_pdev; 28 struct device_node *phy_node; 29 30 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0); 31 if (!phy_node) { 32 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n"); 33 return -ENXIO; 34 } 35 36 phy_pdev = of_find_device_by_node(phy_node); 37 if (phy_pdev) { 38 msm_dsi->phy = platform_get_drvdata(phy_pdev); 39 msm_dsi->phy_dev = &phy_pdev->dev; 40 } 41 42 of_node_put(phy_node); 43 44 if (!phy_pdev) { 45 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__); 46 return -EPROBE_DEFER; 47 } 48 if (!msm_dsi->phy) { 49 put_device(&phy_pdev->dev); 50 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__); 51 return -EPROBE_DEFER; 52 } 53 54 return 0; 55 } 56 57 static void dsi_destroy(struct msm_dsi *msm_dsi) 58 { 59 if (!msm_dsi) 60 return; 61 62 msm_dsi_manager_unregister(msm_dsi); 63 64 if (msm_dsi->phy_dev) { 65 put_device(msm_dsi->phy_dev); 66 msm_dsi->phy = NULL; 67 msm_dsi->phy_dev = NULL; 68 } 69 70 if (msm_dsi->host) { 71 msm_dsi_host_destroy(msm_dsi->host); 72 msm_dsi->host = NULL; 73 } 74 75 platform_set_drvdata(msm_dsi->pdev, NULL); 76 } 77 78 static struct msm_dsi *dsi_init(struct platform_device *pdev) 79 { 80 struct msm_dsi *msm_dsi; 81 int ret; 82 83 if (!pdev) 84 return ERR_PTR(-ENXIO); 85 86 msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL); 87 if (!msm_dsi) 88 return ERR_PTR(-ENOMEM); 89 DBG("dsi probed=%p", msm_dsi); 90 91 msm_dsi->id = -1; 92 msm_dsi->pdev = pdev; 93 platform_set_drvdata(pdev, msm_dsi); 94 95 /* Init dsi host */ 96 ret = msm_dsi_host_init(msm_dsi); 97 if (ret) 98 goto destroy_dsi; 99 100 /* GET dsi PHY */ 101 ret = dsi_get_phy(msm_dsi); 102 if (ret) 103 goto destroy_dsi; 104 105 /* Register to dsi manager */ 106 ret = msm_dsi_manager_register(msm_dsi); 107 if (ret) 108 goto destroy_dsi; 109 110 return msm_dsi; 111 112 destroy_dsi: 113 dsi_destroy(msm_dsi); 114 return ERR_PTR(ret); 115 } 116 117 static int dsi_bind(struct device *dev, struct device *master, void *data) 118 { 119 struct msm_drm_private *priv = dev_get_drvdata(master); 120 struct msm_dsi *msm_dsi = dev_get_drvdata(dev); 121 122 priv->dsi[msm_dsi->id] = msm_dsi; 123 124 return 0; 125 } 126 127 static void dsi_unbind(struct device *dev, struct device *master, 128 void *data) 129 { 130 struct msm_drm_private *priv = dev_get_drvdata(master); 131 struct msm_dsi *msm_dsi = dev_get_drvdata(dev); 132 133 priv->dsi[msm_dsi->id] = NULL; 134 } 135 136 static const struct component_ops dsi_ops = { 137 .bind = dsi_bind, 138 .unbind = dsi_unbind, 139 }; 140 141 int dsi_dev_attach(struct platform_device *pdev) 142 { 143 return component_add(&pdev->dev, &dsi_ops); 144 } 145 146 void dsi_dev_detach(struct platform_device *pdev) 147 { 148 component_del(&pdev->dev, &dsi_ops); 149 } 150 151 static int dsi_dev_probe(struct platform_device *pdev) 152 { 153 struct msm_dsi *msm_dsi; 154 155 DBG(""); 156 msm_dsi = dsi_init(pdev); 157 if (IS_ERR(msm_dsi)) { 158 /* Don't fail the bind if the dsi port is not connected */ 159 if (PTR_ERR(msm_dsi) == -ENODEV) 160 return 0; 161 else 162 return PTR_ERR(msm_dsi); 163 } 164 165 return 0; 166 } 167 168 static int dsi_dev_remove(struct platform_device *pdev) 169 { 170 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev); 171 172 DBG(""); 173 dsi_destroy(msm_dsi); 174 175 return 0; 176 } 177 178 static const struct of_device_id dt_match[] = { 179 { .compatible = "qcom,mdss-dsi-ctrl", .data = NULL /* autodetect cfg */ }, 180 { .compatible = "qcom,dsi-ctrl-6g-qcm2290", .data = &qcm2290_dsi_cfg_handler }, 181 {} 182 }; 183 184 static const struct dev_pm_ops dsi_pm_ops = { 185 SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL) 186 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 187 pm_runtime_force_resume) 188 }; 189 190 static struct platform_driver dsi_driver = { 191 .probe = dsi_dev_probe, 192 .remove = dsi_dev_remove, 193 .driver = { 194 .name = "msm_dsi", 195 .of_match_table = dt_match, 196 .pm = &dsi_pm_ops, 197 }, 198 }; 199 200 void __init msm_dsi_register(void) 201 { 202 DBG(""); 203 msm_dsi_phy_driver_register(); 204 platform_driver_register(&dsi_driver); 205 } 206 207 void __exit msm_dsi_unregister(void) 208 { 209 DBG(""); 210 msm_dsi_phy_driver_unregister(); 211 platform_driver_unregister(&dsi_driver); 212 } 213 214 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev, 215 struct drm_encoder *encoder) 216 { 217 struct msm_drm_private *priv; 218 struct drm_bridge *ext_bridge; 219 int ret; 220 221 if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev)) 222 return -EINVAL; 223 224 priv = dev->dev_private; 225 msm_dsi->dev = dev; 226 227 ret = msm_dsi_host_modeset_init(msm_dsi->host, dev); 228 if (ret) { 229 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret); 230 goto fail; 231 } 232 233 if (msm_dsi_is_bonded_dsi(msm_dsi) && 234 !msm_dsi_is_master_dsi(msm_dsi)) { 235 /* 236 * Do not return an eror here, 237 * Just skip creating encoder/connector for the slave-DSI. 238 */ 239 return 0; 240 } 241 242 msm_dsi->encoder = encoder; 243 244 msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id); 245 if (IS_ERR(msm_dsi->bridge)) { 246 ret = PTR_ERR(msm_dsi->bridge); 247 DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret); 248 msm_dsi->bridge = NULL; 249 goto fail; 250 } 251 252 /* 253 * check if the dsi encoder output is connected to a panel or an 254 * external bridge. We create a connector only if we're connected to a 255 * drm_panel device. When we're connected to an external bridge, we 256 * assume that the drm_bridge driver will create the connector itself. 257 */ 258 ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host); 259 260 if (ext_bridge) 261 msm_dsi->connector = 262 msm_dsi_manager_ext_bridge_init(msm_dsi->id); 263 else 264 msm_dsi->connector = 265 msm_dsi_manager_connector_init(msm_dsi->id); 266 267 if (IS_ERR(msm_dsi->connector)) { 268 ret = PTR_ERR(msm_dsi->connector); 269 DRM_DEV_ERROR(dev->dev, 270 "failed to create dsi connector: %d\n", ret); 271 msm_dsi->connector = NULL; 272 goto fail; 273 } 274 275 priv->bridges[priv->num_bridges++] = msm_dsi->bridge; 276 priv->connectors[priv->num_connectors++] = msm_dsi->connector; 277 278 return 0; 279 fail: 280 /* bridge/connector are normally destroyed by drm: */ 281 if (msm_dsi->bridge) { 282 msm_dsi_manager_bridge_destroy(msm_dsi->bridge); 283 msm_dsi->bridge = NULL; 284 } 285 286 /* don't destroy connector if we didn't make it */ 287 if (msm_dsi->connector && !msm_dsi->external_bridge) 288 msm_dsi->connector->funcs->destroy(msm_dsi->connector); 289 290 msm_dsi->connector = NULL; 291 292 return ret; 293 } 294 295 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi) 296 { 297 msm_dsi_host_snapshot(disp_state, msm_dsi->host); 298 msm_dsi_phy_snapshot(disp_state, msm_dsi->phy); 299 } 300 301