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