1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
8 struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
10 if (!msm_dsi || !msm_dsi_device_connected(msm_dsi))
13 return msm_dsi->encoder;
16 bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi)
18 unsigned long host_flags = msm_dsi_host_get_mode_flags(msm_dsi->host);
20 return !(host_flags & MIPI_DSI_MODE_VIDEO);
23 static int dsi_get_phy(struct msm_dsi *msm_dsi)
25 struct platform_device *pdev = msm_dsi->pdev;
26 struct platform_device *phy_pdev;
27 struct device_node *phy_node;
29 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
31 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n");
35 phy_pdev = of_find_device_by_node(phy_node);
37 msm_dsi->phy = platform_get_drvdata(phy_pdev);
38 msm_dsi->phy_dev = &phy_pdev->dev;
41 of_node_put(phy_node);
43 if (!phy_pdev || !msm_dsi->phy) {
44 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
51 static void dsi_destroy(struct msm_dsi *msm_dsi)
56 msm_dsi_manager_unregister(msm_dsi);
58 if (msm_dsi->phy_dev) {
59 put_device(msm_dsi->phy_dev);
61 msm_dsi->phy_dev = NULL;
65 msm_dsi_host_destroy(msm_dsi->host);
69 platform_set_drvdata(msm_dsi->pdev, NULL);
72 static struct msm_dsi *dsi_init(struct platform_device *pdev)
74 struct msm_dsi *msm_dsi;
78 return ERR_PTR(-ENXIO);
80 msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
82 return ERR_PTR(-ENOMEM);
83 DBG("dsi probed=%p", msm_dsi);
87 platform_set_drvdata(pdev, msm_dsi);
90 ret = msm_dsi_host_init(msm_dsi);
95 ret = dsi_get_phy(msm_dsi);
99 /* Register to dsi manager */
100 ret = msm_dsi_manager_register(msm_dsi);
107 dsi_destroy(msm_dsi);
111 static int dsi_bind(struct device *dev, struct device *master, void *data)
113 struct drm_device *drm = dev_get_drvdata(master);
114 struct msm_drm_private *priv = drm->dev_private;
115 struct platform_device *pdev = to_platform_device(dev);
116 struct msm_dsi *msm_dsi;
119 msm_dsi = dsi_init(pdev);
120 if (IS_ERR(msm_dsi)) {
121 /* Don't fail the bind if the dsi port is not connected */
122 if (PTR_ERR(msm_dsi) == -ENODEV)
125 return PTR_ERR(msm_dsi);
128 priv->dsi[msm_dsi->id] = msm_dsi;
133 static void dsi_unbind(struct device *dev, struct device *master,
136 struct drm_device *drm = dev_get_drvdata(master);
137 struct msm_drm_private *priv = drm->dev_private;
138 struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
139 int id = msm_dsi->id;
142 dsi_destroy(msm_dsi);
143 priv->dsi[id] = NULL;
147 static const struct component_ops dsi_ops = {
149 .unbind = dsi_unbind,
152 static int dsi_dev_probe(struct platform_device *pdev)
154 return component_add(&pdev->dev, &dsi_ops);
157 static int dsi_dev_remove(struct platform_device *pdev)
160 component_del(&pdev->dev, &dsi_ops);
164 static const struct of_device_id dt_match[] = {
165 { .compatible = "qcom,mdss-dsi-ctrl" },
169 static const struct dev_pm_ops dsi_pm_ops = {
170 SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL)
171 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
172 pm_runtime_force_resume)
175 static struct platform_driver dsi_driver = {
176 .probe = dsi_dev_probe,
177 .remove = dsi_dev_remove,
180 .of_match_table = dt_match,
185 void __init msm_dsi_register(void)
188 msm_dsi_phy_driver_register();
189 platform_driver_register(&dsi_driver);
192 void __exit msm_dsi_unregister(void)
195 msm_dsi_phy_driver_unregister();
196 platform_driver_unregister(&dsi_driver);
199 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
200 struct drm_encoder *encoder)
202 struct msm_drm_private *priv;
203 struct drm_bridge *ext_bridge;
206 if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev))
209 priv = dev->dev_private;
212 ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
214 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret);
218 if (!msm_dsi_manager_validate_current_config(msm_dsi->id))
221 msm_dsi->encoder = encoder;
223 msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id);
224 if (IS_ERR(msm_dsi->bridge)) {
225 ret = PTR_ERR(msm_dsi->bridge);
226 DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret);
227 msm_dsi->bridge = NULL;
232 * check if the dsi encoder output is connected to a panel or an
233 * external bridge. We create a connector only if we're connected to a
234 * drm_panel device. When we're connected to an external bridge, we
235 * assume that the drm_bridge driver will create the connector itself.
237 ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
241 msm_dsi_manager_ext_bridge_init(msm_dsi->id);
244 msm_dsi_manager_connector_init(msm_dsi->id);
246 if (IS_ERR(msm_dsi->connector)) {
247 ret = PTR_ERR(msm_dsi->connector);
248 DRM_DEV_ERROR(dev->dev,
249 "failed to create dsi connector: %d\n", ret);
250 msm_dsi->connector = NULL;
254 priv->bridges[priv->num_bridges++] = msm_dsi->bridge;
255 priv->connectors[priv->num_connectors++] = msm_dsi->connector;
259 /* bridge/connector are normally destroyed by drm: */
260 if (msm_dsi->bridge) {
261 msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
262 msm_dsi->bridge = NULL;
265 /* don't destroy connector if we didn't make it */
266 if (msm_dsi->connector && !msm_dsi->external_bridge)
267 msm_dsi->connector->funcs->destroy(msm_dsi->connector);
269 msm_dsi->connector = NULL;
274 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi)
276 msm_dsi_host_snapshot(disp_state, msm_dsi->host);
277 msm_dsi_phy_snapshot(disp_state, msm_dsi->phy);