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 #include "dsi_cfg.h"
8
msm_dsi_get_encoder(struct msm_dsi * msm_dsi)9 struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
10 {
11 if (!msm_dsi || !msm_dsi_device_connected(msm_dsi))
12 return NULL;
13
14 return msm_dsi->encoder;
15 }
16
msm_dsi_is_cmd_mode(struct msm_dsi * msm_dsi)17 bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi)
18 {
19 unsigned long host_flags = msm_dsi_host_get_mode_flags(msm_dsi->host);
20
21 return !(host_flags & MIPI_DSI_MODE_VIDEO);
22 }
23
msm_dsi_get_dsc_config(struct msm_dsi * msm_dsi)24 struct msm_display_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi)
25 {
26 return msm_dsi_host_get_dsc_config(msm_dsi->host);
27 }
28
dsi_get_phy(struct msm_dsi * msm_dsi)29 static int dsi_get_phy(struct msm_dsi *msm_dsi)
30 {
31 struct platform_device *pdev = msm_dsi->pdev;
32 struct platform_device *phy_pdev;
33 struct device_node *phy_node;
34
35 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
36 if (!phy_node) {
37 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n");
38 return -ENXIO;
39 }
40
41 phy_pdev = of_find_device_by_node(phy_node);
42 if (phy_pdev) {
43 msm_dsi->phy = platform_get_drvdata(phy_pdev);
44 msm_dsi->phy_dev = &phy_pdev->dev;
45 }
46
47 of_node_put(phy_node);
48
49 if (!phy_pdev) {
50 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
51 return -EPROBE_DEFER;
52 }
53 if (!msm_dsi->phy) {
54 put_device(&phy_pdev->dev);
55 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
56 return -EPROBE_DEFER;
57 }
58
59 return 0;
60 }
61
dsi_destroy(struct msm_dsi * msm_dsi)62 static void dsi_destroy(struct msm_dsi *msm_dsi)
63 {
64 if (!msm_dsi)
65 return;
66
67 msm_dsi_manager_unregister(msm_dsi);
68
69 if (msm_dsi->phy_dev) {
70 put_device(msm_dsi->phy_dev);
71 msm_dsi->phy = NULL;
72 msm_dsi->phy_dev = NULL;
73 }
74
75 if (msm_dsi->host) {
76 msm_dsi_host_destroy(msm_dsi->host);
77 msm_dsi->host = NULL;
78 }
79
80 platform_set_drvdata(msm_dsi->pdev, NULL);
81 }
82
dsi_init(struct platform_device * pdev)83 static struct msm_dsi *dsi_init(struct platform_device *pdev)
84 {
85 struct msm_dsi *msm_dsi;
86 int ret;
87
88 if (!pdev)
89 return ERR_PTR(-ENXIO);
90
91 msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
92 if (!msm_dsi)
93 return ERR_PTR(-ENOMEM);
94 DBG("dsi probed=%p", msm_dsi);
95
96 msm_dsi->id = -1;
97 msm_dsi->pdev = pdev;
98 platform_set_drvdata(pdev, msm_dsi);
99
100 /* Init dsi host */
101 ret = msm_dsi_host_init(msm_dsi);
102 if (ret)
103 goto destroy_dsi;
104
105 /* GET dsi PHY */
106 ret = dsi_get_phy(msm_dsi);
107 if (ret)
108 goto destroy_dsi;
109
110 /* Register to dsi manager */
111 ret = msm_dsi_manager_register(msm_dsi);
112 if (ret)
113 goto destroy_dsi;
114
115 return msm_dsi;
116
117 destroy_dsi:
118 dsi_destroy(msm_dsi);
119 return ERR_PTR(ret);
120 }
121
dsi_bind(struct device * dev,struct device * master,void * data)122 static int dsi_bind(struct device *dev, struct device *master, void *data)
123 {
124 struct msm_drm_private *priv = dev_get_drvdata(master);
125 struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
126
127 priv->dsi[msm_dsi->id] = msm_dsi;
128
129 return 0;
130 }
131
dsi_unbind(struct device * dev,struct device * master,void * data)132 static void dsi_unbind(struct device *dev, struct device *master,
133 void *data)
134 {
135 struct msm_drm_private *priv = dev_get_drvdata(master);
136 struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
137
138 priv->dsi[msm_dsi->id] = NULL;
139 }
140
141 static const struct component_ops dsi_ops = {
142 .bind = dsi_bind,
143 .unbind = dsi_unbind,
144 };
145
dsi_dev_attach(struct platform_device * pdev)146 int dsi_dev_attach(struct platform_device *pdev)
147 {
148 return component_add(&pdev->dev, &dsi_ops);
149 }
150
dsi_dev_detach(struct platform_device * pdev)151 void dsi_dev_detach(struct platform_device *pdev)
152 {
153 component_del(&pdev->dev, &dsi_ops);
154 }
155
dsi_dev_probe(struct platform_device * pdev)156 static int dsi_dev_probe(struct platform_device *pdev)
157 {
158 struct msm_dsi *msm_dsi;
159
160 DBG("");
161 msm_dsi = dsi_init(pdev);
162 if (IS_ERR(msm_dsi)) {
163 /* Don't fail the bind if the dsi port is not connected */
164 if (PTR_ERR(msm_dsi) == -ENODEV)
165 return 0;
166 else
167 return PTR_ERR(msm_dsi);
168 }
169
170 return 0;
171 }
172
dsi_dev_remove(struct platform_device * pdev)173 static int dsi_dev_remove(struct platform_device *pdev)
174 {
175 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
176
177 DBG("");
178 dsi_destroy(msm_dsi);
179
180 return 0;
181 }
182
183 static const struct of_device_id dt_match[] = {
184 { .compatible = "qcom,mdss-dsi-ctrl", .data = NULL /* autodetect cfg */ },
185 { .compatible = "qcom,dsi-ctrl-6g-qcm2290", .data = &qcm2290_dsi_cfg_handler },
186 {}
187 };
188
189 static const struct dev_pm_ops dsi_pm_ops = {
190 SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL)
191 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
192 pm_runtime_force_resume)
193 };
194
195 static struct platform_driver dsi_driver = {
196 .probe = dsi_dev_probe,
197 .remove = dsi_dev_remove,
198 .driver = {
199 .name = "msm_dsi",
200 .of_match_table = dt_match,
201 .pm = &dsi_pm_ops,
202 },
203 };
204
msm_dsi_register(void)205 void __init msm_dsi_register(void)
206 {
207 DBG("");
208 msm_dsi_phy_driver_register();
209 platform_driver_register(&dsi_driver);
210 }
211
msm_dsi_unregister(void)212 void __exit msm_dsi_unregister(void)
213 {
214 DBG("");
215 msm_dsi_phy_driver_unregister();
216 platform_driver_unregister(&dsi_driver);
217 }
218
msm_dsi_modeset_init(struct msm_dsi * msm_dsi,struct drm_device * dev,struct drm_encoder * encoder)219 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
220 struct drm_encoder *encoder)
221 {
222 struct msm_drm_private *priv;
223 struct drm_bridge *ext_bridge;
224 int ret;
225
226 if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev))
227 return -EINVAL;
228
229 priv = dev->dev_private;
230 msm_dsi->dev = dev;
231
232 ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
233 if (ret) {
234 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret);
235 goto fail;
236 }
237
238 if (msm_dsi_is_bonded_dsi(msm_dsi) &&
239 !msm_dsi_is_master_dsi(msm_dsi)) {
240 /*
241 * Do not return an eror here,
242 * Just skip creating encoder/connector for the slave-DSI.
243 */
244 return 0;
245 }
246
247 msm_dsi->encoder = encoder;
248
249 msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id);
250 if (IS_ERR(msm_dsi->bridge)) {
251 ret = PTR_ERR(msm_dsi->bridge);
252 DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret);
253 msm_dsi->bridge = NULL;
254 goto fail;
255 }
256
257 /*
258 * check if the dsi encoder output is connected to a panel or an
259 * external bridge. We create a connector only if we're connected to a
260 * drm_panel device. When we're connected to an external bridge, we
261 * assume that the drm_bridge driver will create the connector itself.
262 */
263 ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
264
265 if (ext_bridge)
266 msm_dsi->connector =
267 msm_dsi_manager_ext_bridge_init(msm_dsi->id);
268 else
269 msm_dsi->connector =
270 msm_dsi_manager_connector_init(msm_dsi->id);
271
272 if (IS_ERR(msm_dsi->connector)) {
273 ret = PTR_ERR(msm_dsi->connector);
274 DRM_DEV_ERROR(dev->dev,
275 "failed to create dsi connector: %d\n", ret);
276 msm_dsi->connector = NULL;
277 goto fail;
278 }
279
280 priv->bridges[priv->num_bridges++] = msm_dsi->bridge;
281
282 return 0;
283 fail:
284 /* bridge/connector are normally destroyed by drm: */
285 if (msm_dsi->bridge) {
286 msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
287 msm_dsi->bridge = NULL;
288 }
289
290 /* don't destroy connector if we didn't make it */
291 if (msm_dsi->connector && !msm_dsi->external_bridge)
292 msm_dsi->connector->funcs->destroy(msm_dsi->connector);
293
294 msm_dsi->connector = NULL;
295
296 return ret;
297 }
298
msm_dsi_snapshot(struct msm_disp_state * disp_state,struct msm_dsi * msm_dsi)299 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi)
300 {
301 msm_dsi_host_snapshot(disp_state, msm_dsi->host);
302 msm_dsi_phy_snapshot(disp_state, msm_dsi->phy);
303 }
304
305