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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