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 msm_dsi_tx_buf_free(msm_dsi->host); 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" }, 177 178 /* Deprecated, don't use */ 179 { .compatible = "qcom,dsi-ctrl-6g-qcm2290" }, 180 {} 181 }; 182 183 static const struct dev_pm_ops dsi_pm_ops = { 184 SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL) 185 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 186 pm_runtime_force_resume) 187 }; 188 189 static struct platform_driver dsi_driver = { 190 .probe = dsi_dev_probe, 191 .remove = dsi_dev_remove, 192 .driver = { 193 .name = "msm_dsi", 194 .of_match_table = dt_match, 195 .pm = &dsi_pm_ops, 196 }, 197 }; 198 199 void __init msm_dsi_register(void) 200 { 201 DBG(""); 202 msm_dsi_phy_driver_register(); 203 platform_driver_register(&dsi_driver); 204 } 205 206 void __exit msm_dsi_unregister(void) 207 { 208 DBG(""); 209 msm_dsi_phy_driver_unregister(); 210 platform_driver_unregister(&dsi_driver); 211 } 212 213 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev, 214 struct drm_encoder *encoder) 215 { 216 struct msm_drm_private *priv = dev->dev_private; 217 int ret; 218 219 if (priv->num_bridges == ARRAY_SIZE(priv->bridges)) { 220 DRM_DEV_ERROR(dev->dev, "too many bridges\n"); 221 return -ENOSPC; 222 } 223 224 msm_dsi->dev = dev; 225 226 ret = msm_dsi_host_modeset_init(msm_dsi->host, dev); 227 if (ret) { 228 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret); 229 goto fail; 230 } 231 232 if (msm_dsi_is_bonded_dsi(msm_dsi) && 233 !msm_dsi_is_master_dsi(msm_dsi)) { 234 /* 235 * Do not return an eror here, 236 * Just skip creating encoder/connector for the slave-DSI. 237 */ 238 return 0; 239 } 240 241 msm_dsi->encoder = encoder; 242 243 msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id); 244 if (IS_ERR(msm_dsi->bridge)) { 245 ret = PTR_ERR(msm_dsi->bridge); 246 DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret); 247 msm_dsi->bridge = NULL; 248 goto fail; 249 } 250 251 ret = msm_dsi_manager_ext_bridge_init(msm_dsi->id); 252 if (ret) { 253 DRM_DEV_ERROR(dev->dev, 254 "failed to create dsi connector: %d\n", ret); 255 goto fail; 256 } 257 258 priv->bridges[priv->num_bridges++] = msm_dsi->bridge; 259 260 return 0; 261 fail: 262 /* bridge/connector are normally destroyed by drm: */ 263 if (msm_dsi->bridge) { 264 msm_dsi_manager_bridge_destroy(msm_dsi->bridge); 265 msm_dsi->bridge = NULL; 266 } 267 268 return ret; 269 } 270 271 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi) 272 { 273 msm_dsi_host_snapshot(disp_state, msm_dsi->host); 274 msm_dsi_phy_snapshot(disp_state, msm_dsi->phy); 275 } 276 277