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