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 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         /*
 124          * Next bridge doesn't exist for the secondary DSI host in a bonded
 125          * pair.
 126          */
 127         if (!msm_dsi_is_bonded_dsi(msm_dsi) ||
 128             msm_dsi_is_master_dsi(msm_dsi)) {
 129                 struct drm_bridge *ext_bridge;
 130
 131                 ext_bridge = devm_drm_of_get_bridge(&msm_dsi->pdev->dev,
 132                                                     msm_dsi->pdev->dev.of_node, 1, 0);
 133                 if (IS_ERR(ext_bridge))
 134                         return PTR_ERR(ext_bridge);
 135
 136                 msm_dsi->next_bridge = ext_bridge;
 137         }
 138
 139         priv->dsi[msm_dsi->id] = msm_dsi;
 140
 141         return 0;
 142 }
 143
 144 static void dsi_unbind(struct device *dev, struct device *master,
 145                 void *data)
 146 {
 147         struct msm_drm_private *priv = dev_get_drvdata(master);
 148         struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
 149
 150         msm_dsi_tx_buf_free(msm_dsi->host);
 151         priv->dsi[msm_dsi->id] = NULL;
 152 }
 153
 154 static const struct component_ops dsi_ops = {
 155         .bind   = dsi_bind,
 156         .unbind = dsi_unbind,
 157 };
 158
 159 int dsi_dev_attach(struct platform_device *pdev)
 160 {
 161         return component_add(&pdev->dev, &dsi_ops);
 162 }
 163
 164 void dsi_dev_detach(struct platform_device *pdev)
 165 {
 166         component_del(&pdev->dev, &dsi_ops);
 167 }
 168
 169 static int dsi_dev_probe(struct platform_device *pdev)
 170 {
 171         struct msm_dsi *msm_dsi;
 172
 173         DBG("");
 174         msm_dsi = dsi_init(pdev);
 175         if (IS_ERR(msm_dsi)) {
 176                 /* Don't fail the bind if the dsi port is not connected */
 177                 if (PTR_ERR(msm_dsi) == -ENODEV)
 178                         return 0;
 179                 else
 180                         return PTR_ERR(msm_dsi);
 181         }
 182
 183         return 0;
 184 }
 185
 186 static void dsi_dev_remove(struct platform_device *pdev)
 187 {
 188         struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
 189
 190         DBG("");
 191         dsi_destroy(msm_dsi);
 192 }
 193
 194 static const struct of_device_id dt_match[] = {
 195         { .compatible = "qcom,mdss-dsi-ctrl" },
 196
 197         /* Deprecated, don't use */
 198         { .compatible = "qcom,dsi-ctrl-6g-qcm2290" },
 199         {}
 200 };
 201
 202 static const struct dev_pm_ops dsi_pm_ops = {
 203         SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL)
 204         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 205                                 pm_runtime_force_resume)
 206 };
 207
 208 static struct platform_driver dsi_driver = {
 209         .probe = dsi_dev_probe,
 210         .remove_new = dsi_dev_remove,
 211         .driver = {
 212                 .name = "msm_dsi",
 213                 .of_match_table = dt_match,
 214                 .pm = &dsi_pm_ops,
 215         },
 216 };
 217
 218 void __init msm_dsi_register(void)
 219 {
 220         DBG("");
 221         msm_dsi_phy_driver_register();
 222         platform_driver_register(&dsi_driver);
 223 }
 224
 225 void __exit msm_dsi_unregister(void)
 226 {
 227         DBG("");
 228         msm_dsi_phy_driver_unregister();
 229         platform_driver_unregister(&dsi_driver);
 230 }
 231
 232 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
 233                          struct drm_encoder *encoder)
 234 {
 235         int ret;
 236
 237         msm_dsi->dev = dev;
 238
 239         ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
 240         if (ret) {
 241                 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret);
 242                 return ret;
 243         }
 244
 245         if (msm_dsi_is_bonded_dsi(msm_dsi) &&
 246             !msm_dsi_is_master_dsi(msm_dsi)) {
 247                 /*
 248                  * Do not return an eror here,
 249                  * Just skip creating encoder/connector for the slave-DSI.
 250                  */
 251                 return 0;
 252         }
 253
 254         ret = msm_dsi_manager_connector_init(msm_dsi, encoder);
 255         if (ret) {
 256                 DRM_DEV_ERROR(dev->dev,
 257                         "failed to create dsi connector: %d\n", ret);
 258                 return ret;
 259         }
 260
 261         return 0;
 262 }
 263
 264 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi)
 265 {
 266         msm_dsi_host_snapshot(disp_state, msm_dsi->host);
 267         msm_dsi_phy_snapshot(disp_state, msm_dsi->phy);
 268 }
 269