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