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
   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