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 struct msm_display_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi) 25 { 26 return msm_dsi_host_get_dsc_config(msm_dsi->host); 27 } 28 29 static int dsi_get_phy(struct msm_dsi *msm_dsi) 30 { 31 struct platform_device *pdev = msm_dsi->pdev; 32 struct platform_device *phy_pdev; 33 struct device_node *phy_node; 34 35 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0); 36 if (!phy_node) { 37 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n"); 38 return -ENXIO; 39 } 40 41 phy_pdev = of_find_device_by_node(phy_node); 42 if (phy_pdev) { 43 msm_dsi->phy = platform_get_drvdata(phy_pdev); 44 msm_dsi->phy_dev = &phy_pdev->dev; 45 } 46 47 of_node_put(phy_node); 48 49 if (!phy_pdev) { 50 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__); 51 return -EPROBE_DEFER; 52 } 53 if (!msm_dsi->phy) { 54 put_device(&phy_pdev->dev); 55 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__); 56 return -EPROBE_DEFER; 57 } 58 59 return 0; 60 } 61 62 static void dsi_destroy(struct msm_dsi *msm_dsi) 63 { 64 if (!msm_dsi) 65 return; 66 67 msm_dsi_manager_unregister(msm_dsi); 68 69 if (msm_dsi->phy_dev) { 70 put_device(msm_dsi->phy_dev); 71 msm_dsi->phy = NULL; 72 msm_dsi->phy_dev = NULL; 73 } 74 75 if (msm_dsi->host) { 76 msm_dsi_host_destroy(msm_dsi->host); 77 msm_dsi->host = NULL; 78 } 79 80 platform_set_drvdata(msm_dsi->pdev, NULL); 81 } 82 83 static struct msm_dsi *dsi_init(struct platform_device *pdev) 84 { 85 struct msm_dsi *msm_dsi; 86 int ret; 87 88 if (!pdev) 89 return ERR_PTR(-ENXIO); 90 91 msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL); 92 if (!msm_dsi) 93 return ERR_PTR(-ENOMEM); 94 DBG("dsi probed=%p", msm_dsi); 95 96 msm_dsi->id = -1; 97 msm_dsi->pdev = pdev; 98 platform_set_drvdata(pdev, msm_dsi); 99 100 /* Init dsi host */ 101 ret = msm_dsi_host_init(msm_dsi); 102 if (ret) 103 goto destroy_dsi; 104 105 /* GET dsi PHY */ 106 ret = dsi_get_phy(msm_dsi); 107 if (ret) 108 goto destroy_dsi; 109 110 /* Register to dsi manager */ 111 ret = msm_dsi_manager_register(msm_dsi); 112 if (ret) 113 goto destroy_dsi; 114 115 return msm_dsi; 116 117 destroy_dsi: 118 dsi_destroy(msm_dsi); 119 return ERR_PTR(ret); 120 } 121 122 static int dsi_bind(struct device *dev, struct device *master, void *data) 123 { 124 struct msm_drm_private *priv = dev_get_drvdata(master); 125 struct msm_dsi *msm_dsi = dev_get_drvdata(dev); 126 127 priv->dsi[msm_dsi->id] = msm_dsi; 128 129 return 0; 130 } 131 132 static void dsi_unbind(struct device *dev, struct device *master, 133 void *data) 134 { 135 struct msm_drm_private *priv = dev_get_drvdata(master); 136 struct msm_dsi *msm_dsi = dev_get_drvdata(dev); 137 138 priv->dsi[msm_dsi->id] = NULL; 139 } 140 141 static const struct component_ops dsi_ops = { 142 .bind = dsi_bind, 143 .unbind = dsi_unbind, 144 }; 145 146 int dsi_dev_attach(struct platform_device *pdev) 147 { 148 return component_add(&pdev->dev, &dsi_ops); 149 } 150 151 void dsi_dev_detach(struct platform_device *pdev) 152 { 153 component_del(&pdev->dev, &dsi_ops); 154 } 155 156 static int dsi_dev_probe(struct platform_device *pdev) 157 { 158 struct msm_dsi *msm_dsi; 159 160 DBG(""); 161 msm_dsi = dsi_init(pdev); 162 if (IS_ERR(msm_dsi)) { 163 /* Don't fail the bind if the dsi port is not connected */ 164 if (PTR_ERR(msm_dsi) == -ENODEV) 165 return 0; 166 else 167 return PTR_ERR(msm_dsi); 168 } 169 170 return 0; 171 } 172 173 static int dsi_dev_remove(struct platform_device *pdev) 174 { 175 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev); 176 177 DBG(""); 178 dsi_destroy(msm_dsi); 179 180 return 0; 181 } 182 183 static const struct of_device_id dt_match[] = { 184 { .compatible = "qcom,mdss-dsi-ctrl", .data = NULL /* autodetect cfg */ }, 185 { .compatible = "qcom,dsi-ctrl-6g-qcm2290", .data = &qcm2290_dsi_cfg_handler }, 186 {} 187 }; 188 189 static const struct dev_pm_ops dsi_pm_ops = { 190 SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL) 191 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 192 pm_runtime_force_resume) 193 }; 194 195 static struct platform_driver dsi_driver = { 196 .probe = dsi_dev_probe, 197 .remove = dsi_dev_remove, 198 .driver = { 199 .name = "msm_dsi", 200 .of_match_table = dt_match, 201 .pm = &dsi_pm_ops, 202 }, 203 }; 204 205 void __init msm_dsi_register(void) 206 { 207 DBG(""); 208 msm_dsi_phy_driver_register(); 209 platform_driver_register(&dsi_driver); 210 } 211 212 void __exit msm_dsi_unregister(void) 213 { 214 DBG(""); 215 msm_dsi_phy_driver_unregister(); 216 platform_driver_unregister(&dsi_driver); 217 } 218 219 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev, 220 struct drm_encoder *encoder) 221 { 222 struct msm_drm_private *priv; 223 struct drm_bridge *ext_bridge; 224 int ret; 225 226 if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev)) 227 return -EINVAL; 228 229 priv = dev->dev_private; 230 msm_dsi->dev = dev; 231 232 ret = msm_dsi_host_modeset_init(msm_dsi->host, dev); 233 if (ret) { 234 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret); 235 goto fail; 236 } 237 238 if (msm_dsi_is_bonded_dsi(msm_dsi) && 239 !msm_dsi_is_master_dsi(msm_dsi)) { 240 /* 241 * Do not return an eror here, 242 * Just skip creating encoder/connector for the slave-DSI. 243 */ 244 return 0; 245 } 246 247 msm_dsi->encoder = encoder; 248 249 msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id); 250 if (IS_ERR(msm_dsi->bridge)) { 251 ret = PTR_ERR(msm_dsi->bridge); 252 DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret); 253 msm_dsi->bridge = NULL; 254 goto fail; 255 } 256 257 /* 258 * check if the dsi encoder output is connected to a panel or an 259 * external bridge. We create a connector only if we're connected to a 260 * drm_panel device. When we're connected to an external bridge, we 261 * assume that the drm_bridge driver will create the connector itself. 262 */ 263 ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host); 264 265 if (ext_bridge) 266 msm_dsi->connector = 267 msm_dsi_manager_ext_bridge_init(msm_dsi->id); 268 else 269 msm_dsi->connector = 270 msm_dsi_manager_connector_init(msm_dsi->id); 271 272 if (IS_ERR(msm_dsi->connector)) { 273 ret = PTR_ERR(msm_dsi->connector); 274 DRM_DEV_ERROR(dev->dev, 275 "failed to create dsi connector: %d\n", ret); 276 msm_dsi->connector = NULL; 277 goto fail; 278 } 279 280 priv->bridges[priv->num_bridges++] = msm_dsi->bridge; 281 282 return 0; 283 fail: 284 /* bridge/connector are normally destroyed by drm: */ 285 if (msm_dsi->bridge) { 286 msm_dsi_manager_bridge_destroy(msm_dsi->bridge); 287 msm_dsi->bridge = NULL; 288 } 289 290 /* don't destroy connector if we didn't make it */ 291 if (msm_dsi->connector && !msm_dsi->external_bridge) 292 msm_dsi->connector->funcs->destroy(msm_dsi->connector); 293 294 msm_dsi->connector = NULL; 295 296 return ret; 297 } 298 299 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi) 300 { 301 msm_dsi_host_snapshot(disp_state, msm_dsi->host); 302 msm_dsi_phy_snapshot(disp_state, msm_dsi->phy); 303 } 304 305