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