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
  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 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
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		else
180			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 = 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