1 /* 2 * Copyright (c) 2015, The Linux Foundation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 and 6 * only version 2 as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #include "dsi.h" 15 16 struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi) 17 { 18 if (!msm_dsi || !msm_dsi_device_connected(msm_dsi)) 19 return NULL; 20 21 return (msm_dsi->device_flags & MIPI_DSI_MODE_VIDEO) ? 22 msm_dsi->encoders[MSM_DSI_VIDEO_ENCODER_ID] : 23 msm_dsi->encoders[MSM_DSI_CMD_ENCODER_ID]; 24 } 25 26 static int dsi_get_phy(struct msm_dsi *msm_dsi) 27 { 28 struct platform_device *pdev = msm_dsi->pdev; 29 struct platform_device *phy_pdev; 30 struct device_node *phy_node; 31 32 phy_node = of_parse_phandle(pdev->dev.of_node, "qcom,dsi-phy", 0); 33 if (!phy_node) { 34 dev_err(&pdev->dev, "cannot find phy device\n"); 35 return -ENXIO; 36 } 37 38 phy_pdev = of_find_device_by_node(phy_node); 39 if (phy_pdev) 40 msm_dsi->phy = platform_get_drvdata(phy_pdev); 41 42 of_node_put(phy_node); 43 44 if (!phy_pdev || !msm_dsi->phy) { 45 dev_err(&pdev->dev, "%s: phy driver is not ready\n", __func__); 46 return -EPROBE_DEFER; 47 } 48 49 msm_dsi->phy_dev = get_device(&phy_pdev->dev); 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->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 drm_device *drm = dev_get_drvdata(master); 116 struct msm_drm_private *priv = drm->dev_private; 117 struct platform_device *pdev = to_platform_device(dev); 118 struct msm_dsi *msm_dsi; 119 120 DBG(""); 121 msm_dsi = dsi_init(pdev); 122 if (IS_ERR(msm_dsi)) 123 return PTR_ERR(msm_dsi); 124 125 priv->dsi[msm_dsi->id] = msm_dsi; 126 127 return 0; 128 } 129 130 static void dsi_unbind(struct device *dev, struct device *master, 131 void *data) 132 { 133 struct drm_device *drm = dev_get_drvdata(master); 134 struct msm_drm_private *priv = drm->dev_private; 135 struct msm_dsi *msm_dsi = dev_get_drvdata(dev); 136 int id = msm_dsi->id; 137 138 if (priv->dsi[id]) { 139 dsi_destroy(msm_dsi); 140 priv->dsi[id] = NULL; 141 } 142 } 143 144 static const struct component_ops dsi_ops = { 145 .bind = dsi_bind, 146 .unbind = dsi_unbind, 147 }; 148 149 static int dsi_dev_probe(struct platform_device *pdev) 150 { 151 return component_add(&pdev->dev, &dsi_ops); 152 } 153 154 static int dsi_dev_remove(struct platform_device *pdev) 155 { 156 DBG(""); 157 component_del(&pdev->dev, &dsi_ops); 158 return 0; 159 } 160 161 static const struct of_device_id dt_match[] = { 162 { .compatible = "qcom,mdss-dsi-ctrl" }, 163 {} 164 }; 165 166 static struct platform_driver dsi_driver = { 167 .probe = dsi_dev_probe, 168 .remove = dsi_dev_remove, 169 .driver = { 170 .name = "msm_dsi", 171 .of_match_table = dt_match, 172 }, 173 }; 174 175 void __init msm_dsi_register(void) 176 { 177 DBG(""); 178 msm_dsi_phy_driver_register(); 179 platform_driver_register(&dsi_driver); 180 } 181 182 void __exit msm_dsi_unregister(void) 183 { 184 DBG(""); 185 msm_dsi_phy_driver_unregister(); 186 platform_driver_unregister(&dsi_driver); 187 } 188 189 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev, 190 struct drm_encoder *encoders[MSM_DSI_ENCODER_NUM]) 191 { 192 struct msm_drm_private *priv = dev->dev_private; 193 struct drm_bridge *ext_bridge; 194 int ret, i; 195 196 if (WARN_ON(!encoders[MSM_DSI_VIDEO_ENCODER_ID] || 197 !encoders[MSM_DSI_CMD_ENCODER_ID])) 198 return -EINVAL; 199 200 msm_dsi->dev = dev; 201 202 ret = msm_dsi_host_modeset_init(msm_dsi->host, dev); 203 if (ret) { 204 dev_err(dev->dev, "failed to modeset init host: %d\n", ret); 205 goto fail; 206 } 207 208 msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id); 209 if (IS_ERR(msm_dsi->bridge)) { 210 ret = PTR_ERR(msm_dsi->bridge); 211 dev_err(dev->dev, "failed to create dsi bridge: %d\n", ret); 212 msm_dsi->bridge = NULL; 213 goto fail; 214 } 215 216 for (i = 0; i < MSM_DSI_ENCODER_NUM; i++) { 217 encoders[i]->bridge = msm_dsi->bridge; 218 msm_dsi->encoders[i] = encoders[i]; 219 } 220 221 /* 222 * check if the dsi encoder output is connected to a panel or an 223 * external bridge. We create a connector only if we're connected to a 224 * drm_panel device. When we're connected to an external bridge, we 225 * assume that the drm_bridge driver will create the connector itself. 226 */ 227 ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host); 228 229 if (ext_bridge) 230 msm_dsi->connector = 231 msm_dsi_manager_ext_bridge_init(msm_dsi->id); 232 else 233 msm_dsi->connector = 234 msm_dsi_manager_connector_init(msm_dsi->id); 235 236 if (IS_ERR(msm_dsi->connector)) { 237 ret = PTR_ERR(msm_dsi->connector); 238 dev_err(dev->dev, 239 "failed to create dsi connector: %d\n", ret); 240 msm_dsi->connector = NULL; 241 goto fail; 242 } 243 244 priv->bridges[priv->num_bridges++] = msm_dsi->bridge; 245 priv->connectors[priv->num_connectors++] = msm_dsi->connector; 246 247 return 0; 248 fail: 249 if (msm_dsi) { 250 /* bridge/connector are normally destroyed by drm: */ 251 if (msm_dsi->bridge) { 252 msm_dsi_manager_bridge_destroy(msm_dsi->bridge); 253 msm_dsi->bridge = NULL; 254 } 255 256 /* don't destroy connector if we didn't make it */ 257 if (msm_dsi->connector && !msm_dsi->external_bridge) 258 msm_dsi->connector->funcs->destroy(msm_dsi->connector); 259 260 msm_dsi->connector = NULL; 261 } 262 263 return ret; 264 } 265 266