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
msm_dsi_is_cmd_mode(struct msm_dsi * msm_dsi)8 bool 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
msm_dsi_get_dsc_config(struct msm_dsi * msm_dsi)15 struct 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
msm_dsi_wide_bus_enabled(struct msm_dsi * msm_dsi)20 bool 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
dsi_get_phy(struct msm_dsi * msm_dsi)25 static 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
dsi_destroy(struct msm_dsi * msm_dsi)58 static 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
dsi_init(struct platform_device * pdev)79 static 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
113 destroy_dsi:
114 dsi_destroy(msm_dsi);
115 return ERR_PTR(ret);
116 }
117
dsi_bind(struct device * dev,struct device * master,void * data)118 static 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
dsi_unbind(struct device * dev,struct device * master,void * data)144 static 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
154 static const struct component_ops dsi_ops = {
155 .bind = dsi_bind,
156 .unbind = dsi_unbind,
157 };
158
dsi_dev_attach(struct platform_device * pdev)159 int dsi_dev_attach(struct platform_device *pdev)
160 {
161 return component_add(&pdev->dev, &dsi_ops);
162 }
163
dsi_dev_detach(struct platform_device * pdev)164 void dsi_dev_detach(struct platform_device *pdev)
165 {
166 component_del(&pdev->dev, &dsi_ops);
167 }
168
dsi_dev_probe(struct platform_device * pdev)169 static 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
dsi_dev_remove(struct platform_device * pdev)186 static 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
194 static 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
202 static 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
208 static 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
msm_dsi_register(void)218 void __init msm_dsi_register(void)
219 {
220 DBG("");
221 msm_dsi_phy_driver_register();
222 platform_driver_register(&dsi_driver);
223 }
224
msm_dsi_unregister(void)225 void __exit msm_dsi_unregister(void)
226 {
227 DBG("");
228 msm_dsi_phy_driver_unregister();
229 platform_driver_unregister(&dsi_driver);
230 }
231
msm_dsi_modeset_init(struct msm_dsi * msm_dsi,struct drm_device * dev,struct drm_encoder * encoder)232 int 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
msm_dsi_snapshot(struct msm_disp_state * disp_state,struct msm_dsi * msm_dsi)264 void 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