msm/dsi/dsi.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
0004  */
0005
0006 #include "dsi.h"
0007 #include "dsi_cfg.h"
0008
0009 struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
0010 {
0011     if (!msm_dsi || !msm_dsi_device_connected(msm_dsi))
0012         return NULL;
0013
0014     return msm_dsi->encoder;
0015 }
0016
0017 bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi)
0018 {
0019     unsigned long host_flags = msm_dsi_host_get_mode_flags(msm_dsi->host);
0020
0021     return !(host_flags & MIPI_DSI_MODE_VIDEO);
0022 }
0023
0024 struct msm_display_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi)
0025 {
0026     return msm_dsi_host_get_dsc_config(msm_dsi->host);
0027 }
0028
0029 static int dsi_get_phy(struct msm_dsi *msm_dsi)
0030 {
0031     struct platform_device *pdev = msm_dsi->pdev;
0032     struct platform_device *phy_pdev;
0033     struct device_node *phy_node;
0034
0035     phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
0036     if (!phy_node) {
0037         DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n");
0038         return -ENXIO;
0039     }
0040
0041     phy_pdev = of_find_device_by_node(phy_node);
0042     if (phy_pdev) {
0043         msm_dsi->phy = platform_get_drvdata(phy_pdev);
0044         msm_dsi->phy_dev = &phy_pdev->dev;
0045     }
0046
0047     of_node_put(phy_node);
0048
0049     if (!phy_pdev) {
0050         DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
0051         return -EPROBE_DEFER;
0052     }
0053     if (!msm_dsi->phy) {
0054         put_device(&phy_pdev->dev);
0055         DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
0056         return -EPROBE_DEFER;
0057     }
0058
0059     return 0;
0060 }
0061
0062 static void dsi_destroy(struct msm_dsi *msm_dsi)
0063 {
0064     if (!msm_dsi)
0065         return;
0066
0067     msm_dsi_manager_unregister(msm_dsi);
0068
0069     if (msm_dsi->phy_dev) {
0070         put_device(msm_dsi->phy_dev);
0071         msm_dsi->phy = NULL;
0072         msm_dsi->phy_dev = NULL;
0073     }
0074
0075     if (msm_dsi->host) {
0076         msm_dsi_host_destroy(msm_dsi->host);
0077         msm_dsi->host = NULL;
0078     }
0079
0080     platform_set_drvdata(msm_dsi->pdev, NULL);
0081 }
0082
0083 static struct msm_dsi *dsi_init(struct platform_device *pdev)
0084 {
0085     struct msm_dsi *msm_dsi;
0086     int ret;
0087
0088     if (!pdev)
0089         return ERR_PTR(-ENXIO);
0090
0091     msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
0092     if (!msm_dsi)
0093         return ERR_PTR(-ENOMEM);
0094     DBG("dsi probed=%p", msm_dsi);
0095
0096     msm_dsi->id = -1;
0097     msm_dsi->pdev = pdev;
0098     platform_set_drvdata(pdev, msm_dsi);
0099
0100     /* Init dsi host */
0101     ret = msm_dsi_host_init(msm_dsi);
0102     if (ret)
0103         goto destroy_dsi;
0104
0105     /* GET dsi PHY */
0106     ret = dsi_get_phy(msm_dsi);
0107     if (ret)
0108         goto destroy_dsi;
0109
0110     /* Register to dsi manager */
0111     ret = msm_dsi_manager_register(msm_dsi);
0112     if (ret)
0113         goto destroy_dsi;
0114
0115     return msm_dsi;
0116
0117 destroy_dsi:
0118     dsi_destroy(msm_dsi);
0119     return ERR_PTR(ret);
0120 }
0121
0122 static int dsi_bind(struct device *dev, struct device *master, void *data)
0123 {
0124     struct msm_drm_private *priv = dev_get_drvdata(master);
0125     struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
0126
0127     priv->dsi[msm_dsi->id] = msm_dsi;
0128
0129     return 0;
0130 }
0131
0132 static void dsi_unbind(struct device *dev, struct device *master,
0133         void *data)
0134 {
0135     struct msm_drm_private *priv = dev_get_drvdata(master);
0136     struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
0137
0138     priv->dsi[msm_dsi->id] = NULL;
0139 }
0140
0141 static const struct component_ops dsi_ops = {
0142     .bind   = dsi_bind,
0143     .unbind = dsi_unbind,
0144 };
0145
0146 int dsi_dev_attach(struct platform_device *pdev)
0147 {
0148     return component_add(&pdev->dev, &dsi_ops);
0149 }
0150
0151 void dsi_dev_detach(struct platform_device *pdev)
0152 {
0153     component_del(&pdev->dev, &dsi_ops);
0154 }
0155
0156 static int dsi_dev_probe(struct platform_device *pdev)
0157 {
0158     struct msm_dsi *msm_dsi;
0159
0160     DBG("");
0161     msm_dsi = dsi_init(pdev);
0162     if (IS_ERR(msm_dsi)) {
0163         /* Don't fail the bind if the dsi port is not connected */
0164         if (PTR_ERR(msm_dsi) == -ENODEV)
0165             return 0;
0166         else
0167             return PTR_ERR(msm_dsi);
0168     }
0169
0170     return 0;
0171 }
0172
0173 static int dsi_dev_remove(struct platform_device *pdev)
0174 {
0175     struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
0176
0177     DBG("");
0178     dsi_destroy(msm_dsi);
0179
0180     return 0;
0181 }
0182
0183 static const struct of_device_id dt_match[] = {
0184     { .compatible = "qcom,mdss-dsi-ctrl", .data = NULL /* autodetect cfg */ },
0185     { .compatible = "qcom,dsi-ctrl-6g-qcm2290", .data = &qcm2290_dsi_cfg_handler },
0186     {}
0187 };
0188
0189 static const struct dev_pm_ops dsi_pm_ops = {
0190     SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL)
0191     SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
0192                 pm_runtime_force_resume)
0193 };
0194
0195 static struct platform_driver dsi_driver = {
0196     .probe = dsi_dev_probe,
0197     .remove = dsi_dev_remove,
0198     .driver = {
0199         .name = "msm_dsi",
0200         .of_match_table = dt_match,
0201         .pm = &dsi_pm_ops,
0202     },
0203 };
0204
0205 void __init msm_dsi_register(void)
0206 {
0207     DBG("");
0208     msm_dsi_phy_driver_register();
0209     platform_driver_register(&dsi_driver);
0210 }
0211
0212 void __exit msm_dsi_unregister(void)
0213 {
0214     DBG("");
0215     msm_dsi_phy_driver_unregister();
0216     platform_driver_unregister(&dsi_driver);
0217 }
0218
0219 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
0220              struct drm_encoder *encoder)
0221 {
0222     struct msm_drm_private *priv;
0223     struct drm_bridge *ext_bridge;
0224     int ret;
0225
0226     if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev))
0227         return -EINVAL;
0228
0229     priv = dev->dev_private;
0230     msm_dsi->dev = dev;
0231
0232     ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
0233     if (ret) {
0234         DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret);
0235         goto fail;
0236     }
0237
0238     if (msm_dsi_is_bonded_dsi(msm_dsi) &&
0239         !msm_dsi_is_master_dsi(msm_dsi)) {
0240         /*
0241          * Do not return an eror here,
0242          * Just skip creating encoder/connector for the slave-DSI.
0243          */
0244         return 0;
0245     }
0246
0247     msm_dsi->encoder = encoder;
0248
0249     msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id);
0250     if (IS_ERR(msm_dsi->bridge)) {
0251         ret = PTR_ERR(msm_dsi->bridge);
0252         DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret);
0253         msm_dsi->bridge = NULL;
0254         goto fail;
0255     }
0256
0257     /*
0258      * check if the dsi encoder output is connected to a panel or an
0259      * external bridge. We create a connector only if we're connected to a
0260      * drm_panel device. When we're connected to an external bridge, we
0261      * assume that the drm_bridge driver will create the connector itself.
0262      */
0263     ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
0264
0265     if (ext_bridge)
0266         msm_dsi->connector =
0267             msm_dsi_manager_ext_bridge_init(msm_dsi->id);
0268     else
0269         msm_dsi->connector =
0270             msm_dsi_manager_connector_init(msm_dsi->id);
0271
0272     if (IS_ERR(msm_dsi->connector)) {
0273         ret = PTR_ERR(msm_dsi->connector);
0274         DRM_DEV_ERROR(dev->dev,
0275             "failed to create dsi connector: %d\n", ret);
0276         msm_dsi->connector = NULL;
0277         goto fail;
0278     }
0279
0280     priv->bridges[priv->num_bridges++]       = msm_dsi->bridge;
0281
0282     return 0;
0283 fail:
0284     /* bridge/connector are normally destroyed by drm: */
0285     if (msm_dsi->bridge) {
0286         msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
0287         msm_dsi->bridge = NULL;
0288     }
0289
0290     /* don't destroy connector if we didn't make it */
0291     if (msm_dsi->connector && !msm_dsi->external_bridge)
0292         msm_dsi->connector->funcs->destroy(msm_dsi->connector);
0293
0294     msm_dsi->connector = NULL;
0295
0296     return ret;
0297 }
0298
0299 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi)
0300 {
0301     msm_dsi_host_snapshot(disp_state, msm_dsi->host);
0302     msm_dsi_phy_snapshot(disp_state, msm_dsi->phy);
0303 }
0304