drivers/gpu/drm/msm/dsi/dsi.c

   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 struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
  10 {
  11         if (!msm_dsi || !msm_dsi_device_connected(msm_dsi))
  12                 return NULL;
  13
  14         return msm_dsi->encoder;
  15 }
  16
  17 bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi)
  18 {
  19         unsigned long host_flags = msm_dsi_host_get_mode_flags(msm_dsi->host);
  20
  21         return !(host_flags & MIPI_DSI_MODE_VIDEO);
  22 }
  23
  24 struct msm_display_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi)
  25 {
  26         return msm_dsi_host_get_dsc_config(msm_dsi->host);
  27 }
  28
  29 static int dsi_get_phy(struct msm_dsi *msm_dsi)
  30 {
  31         struct platform_device *pdev = msm_dsi->pdev;
  32         struct platform_device *phy_pdev;
  33         struct device_node *phy_node;
  34
  35         phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
  36         if (!phy_node) {
  37                 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n");
  38                 return -ENXIO;
  39         }
  40
  41         phy_pdev = of_find_device_by_node(phy_node);
  42         if (phy_pdev) {
  43                 msm_dsi->phy = platform_get_drvdata(phy_pdev);
  44                 msm_dsi->phy_dev = &phy_pdev->dev;
  45         }
  46
  47         of_node_put(phy_node);
  48
  49         if (!phy_pdev) {
  50                 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
  51                 return -EPROBE_DEFER;
  52         }
  53         if (!msm_dsi->phy) {
  54                 put_device(&phy_pdev->dev);
  55                 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
  56                 return -EPROBE_DEFER;
  57         }
  58
  59         return 0;
  60 }
  61
  62 static void dsi_destroy(struct msm_dsi *msm_dsi)
  63 {
  64         if (!msm_dsi)
  65                 return;
  66
  67         msm_dsi_manager_unregister(msm_dsi);
  68
  69         if (msm_dsi->phy_dev) {
  70                 put_device(msm_dsi->phy_dev);
  71                 msm_dsi->phy = NULL;
  72                 msm_dsi->phy_dev = NULL;
  73         }
  74
  75         if (msm_dsi->host) {
  76                 msm_dsi_host_destroy(msm_dsi->host);
  77                 msm_dsi->host = NULL;
  78         }
  79
  80         platform_set_drvdata(msm_dsi->pdev, NULL);
  81 }
  82
  83 static struct msm_dsi *dsi_init(struct platform_device *pdev)
  84 {
  85         struct msm_dsi *msm_dsi;
  86         int ret;
  87
  88         if (!pdev)
  89                 return ERR_PTR(-ENXIO);
  90
  91         msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
  92         if (!msm_dsi)
  93                 return ERR_PTR(-ENOMEM);
  94         DBG("dsi probed=%p", msm_dsi);
  95
  96         msm_dsi->id = -1;
  97         msm_dsi->pdev = pdev;
  98         platform_set_drvdata(pdev, msm_dsi);
  99
 100         /* Init dsi host */
 101         ret = msm_dsi_host_init(msm_dsi);
 102         if (ret)
 103                 goto destroy_dsi;
 104
 105         /* GET dsi PHY */
 106         ret = dsi_get_phy(msm_dsi);
 107         if (ret)
 108                 goto destroy_dsi;
 109
 110         /* Register to dsi manager */
 111         ret = msm_dsi_manager_register(msm_dsi);
 112         if (ret)
 113                 goto destroy_dsi;
 114
 115         return msm_dsi;
 116
 117 destroy_dsi:
 118         dsi_destroy(msm_dsi);
 119         return ERR_PTR(ret);
 120 }
 121
 122 static int dsi_bind(struct device *dev, struct device *master, void *data)
 123 {
 124         struct msm_drm_private *priv = dev_get_drvdata(master);
 125         struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
 126
 127         priv->dsi[msm_dsi->id] = msm_dsi;
 128
 129         return 0;
 130 }
 131
 132 static void dsi_unbind(struct device *dev, struct device *master,
 133                 void *data)
 134 {
 135         struct msm_drm_private *priv = dev_get_drvdata(master);
 136         struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
 137
 138         priv->dsi[msm_dsi->id] = NULL;
 139 }
 140
 141 static const struct component_ops dsi_ops = {
 142         .bind   = dsi_bind,
 143         .unbind = dsi_unbind,
 144 };
 145
 146 int dsi_dev_attach(struct platform_device *pdev)
 147 {
 148         return component_add(&pdev->dev, &dsi_ops);
 149 }
 150
 151 void dsi_dev_detach(struct platform_device *pdev)
 152 {
 153         component_del(&pdev->dev, &dsi_ops);
 154 }
 155
 156 static int dsi_dev_probe(struct platform_device *pdev)
 157 {
 158         struct msm_dsi *msm_dsi;
 159
 160         DBG("");
 161         msm_dsi = dsi_init(pdev);
 162         if (IS_ERR(msm_dsi)) {
 163                 /* Don't fail the bind if the dsi port is not connected */
 164                 if (PTR_ERR(msm_dsi) == -ENODEV)
 165                         return 0;
 166                 else
 167                         return PTR_ERR(msm_dsi);
 168         }
 169
 170         return 0;
 171 }
 172
 173 static int dsi_dev_remove(struct platform_device *pdev)
 174 {
 175         struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
 176
 177         DBG("");
 178         dsi_destroy(msm_dsi);
 179
 180         return 0;
 181 }
 182
 183 static const struct of_device_id dt_match[] = {
 184         { .compatible = "qcom,mdss-dsi-ctrl", .data = NULL /* autodetect cfg */ },
 185         { .compatible = "qcom,dsi-ctrl-6g-qcm2290", .data = &qcm2290_dsi_cfg_handler },
 186         {}
 187 };
 188
 189 static const struct dev_pm_ops dsi_pm_ops = {
 190         SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL)
 191         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 192                                 pm_runtime_force_resume)
 193 };
 194
 195 static struct platform_driver dsi_driver = {
 196         .probe = dsi_dev_probe,
 197         .remove = dsi_dev_remove,
 198         .driver = {
 199                 .name = "msm_dsi",
 200                 .of_match_table = dt_match,
 201                 .pm = &dsi_pm_ops,
 202         },
 203 };
 204
 205 void __init msm_dsi_register(void)
 206 {
 207         DBG("");
 208         msm_dsi_phy_driver_register();
 209         platform_driver_register(&dsi_driver);
 210 }
 211
 212 void __exit msm_dsi_unregister(void)
 213 {
 214         DBG("");
 215         msm_dsi_phy_driver_unregister();
 216         platform_driver_unregister(&dsi_driver);
 217 }
 218
 219 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
 220                          struct drm_encoder *encoder)
 221 {
 222         struct msm_drm_private *priv;
 223         struct drm_bridge *ext_bridge;
 224         int ret;
 225
 226         if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev))
 227                 return -EINVAL;
 228
 229         priv = dev->dev_private;
 230         msm_dsi->dev = dev;
 231
 232         ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
 233         if (ret) {
 234                 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret);
 235                 goto fail;
 236         }
 237
 238         if (msm_dsi_is_bonded_dsi(msm_dsi) &&
 239             !msm_dsi_is_master_dsi(msm_dsi)) {
 240                 /*
 241                  * Do not return an eror here,
 242                  * Just skip creating encoder/connector for the slave-DSI.
 243                  */
 244                 return 0;
 245         }
 246
 247         msm_dsi->encoder = encoder;
 248
 249         msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id);
 250         if (IS_ERR(msm_dsi->bridge)) {
 251                 ret = PTR_ERR(msm_dsi->bridge);
 252                 DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret);
 253                 msm_dsi->bridge = NULL;
 254                 goto fail;
 255         }
 256
 257         /*
 258          * check if the dsi encoder output is connected to a panel or an
 259          * external bridge. We create a connector only if we're connected to a
 260          * drm_panel device. When we're connected to an external bridge, we
 261          * assume that the drm_bridge driver will create the connector itself.
 262          */
 263         ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
 264
 265         if (ext_bridge)
 266                 msm_dsi->connector =
 267                         msm_dsi_manager_ext_bridge_init(msm_dsi->id);
 268         else
 269                 msm_dsi->connector =
 270                         msm_dsi_manager_connector_init(msm_dsi->id);
 271
 272         if (IS_ERR(msm_dsi->connector)) {
 273                 ret = PTR_ERR(msm_dsi->connector);
 274                 DRM_DEV_ERROR(dev->dev,
 275                         "failed to create dsi connector: %d\n", ret);
 276                 msm_dsi->connector = NULL;
 277                 goto fail;
 278         }
 279
 280         priv->bridges[priv->num_bridges++]       = msm_dsi->bridge;
 281
 282         return 0;
 283 fail:
 284         /* bridge/connector are normally destroyed by drm: */
 285         if (msm_dsi->bridge) {
 286                 msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
 287                 msm_dsi->bridge = NULL;
 288         }
 289
 290         /* don't destroy connector if we didn't make it */
 291         if (msm_dsi->connector && !msm_dsi->external_bridge)
 292                 msm_dsi->connector->funcs->destroy(msm_dsi->connector);
 293
 294         msm_dsi->connector = NULL;
 295
 296         return ret;
 297 }
 298
 299 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi)
 300 {
 301         msm_dsi_host_snapshot(disp_state, msm_dsi->host);
 302         msm_dsi_phy_snapshot(disp_state, msm_dsi->phy);
 303 }
 304