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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (c) 2015, The Linux Foundation. All rights reserved.4 */5 6#include "dsi.h"7 8bool 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 15struct 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 20bool 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 25static 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 58static 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 79static 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 113destroy_dsi:114 dsi_destroy(msm_dsi);115 return ERR_PTR(ret);116}117 118static 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 bonded125 * 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 144static 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 154static const struct component_ops dsi_ops = {155 .bind = dsi_bind,156 .unbind = dsi_unbind,157};158 159int dsi_dev_attach(struct platform_device *pdev)160{161 return component_add(&pdev->dev, &dsi_ops);162}163 164void dsi_dev_detach(struct platform_device *pdev)165{166 component_del(&pdev->dev, &dsi_ops);167}168 169static 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 else180 return PTR_ERR(msm_dsi);181 }182 183 return 0;184}185 186static 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 194static 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 202static 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 208static 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 218void __init msm_dsi_register(void)219{220 DBG("");221 msm_dsi_phy_driver_register();222 platform_driver_register(&dsi_driver);223}224 225void __exit msm_dsi_unregister(void)226{227 DBG("");228 msm_dsi_phy_driver_unregister();229 platform_driver_unregister(&dsi_driver);230}231 232int 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 264void 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}269 270