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