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(host: 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(host: 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(host: 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(np: phy_node);
38 if (phy_pdev) {
39 msm_dsi->phy = platform_get_drvdata(pdev: 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(dev: &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(dev: 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(host: msm_dsi->host);
73 msm_dsi->host = NULL;
74 }
75
76 platform_set_drvdata(pdev: 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(error: -ENXIO);
86
87 msm_dsi = devm_kzalloc(dev: &pdev->dev, size: sizeof(*msm_dsi), GFP_KERNEL);
88 if (!msm_dsi)
89 return ERR_PTR(error: -ENOMEM);
90 DBG("dsi probed=%p", msm_dsi);
91
92 msm_dsi->id = -1;
93 msm_dsi->pdev = pdev;
94 platform_set_drvdata(pdev, data: 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(error: 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(dev: master);
121 struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
122
123 priv->dsi[msm_dsi->id] = msm_dsi;
124
125 return 0;
126}
127
128static void dsi_unbind(struct device *dev, struct device *master,
129 void *data)
130{
131 struct msm_drm_private *priv = dev_get_drvdata(dev: master);
132 struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
133
134 msm_dsi_tx_buf_free(mipi_host: msm_dsi->host);
135 priv->dsi[msm_dsi->id] = NULL;
136}
137
138static const struct component_ops dsi_ops = {
139 .bind = dsi_bind,
140 .unbind = dsi_unbind,
141};
142
143int dsi_dev_attach(struct platform_device *pdev)
144{
145 return component_add(&pdev->dev, &dsi_ops);
146}
147
148void dsi_dev_detach(struct platform_device *pdev)
149{
150 component_del(&pdev->dev, &dsi_ops);
151}
152
153static int dsi_dev_probe(struct platform_device *pdev)
154{
155 struct msm_dsi *msm_dsi;
156
157 DBG("");
158 msm_dsi = dsi_init(pdev);
159 if (IS_ERR(ptr: msm_dsi)) {
160 /* Don't fail the bind if the dsi port is not connected */
161 if (PTR_ERR(ptr: msm_dsi) == -ENODEV)
162 return 0;
163 else
164 return PTR_ERR(ptr: msm_dsi);
165 }
166
167 return 0;
168}
169
170static void dsi_dev_remove(struct platform_device *pdev)
171{
172 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
173
174 DBG("");
175 dsi_destroy(msm_dsi);
176}
177
178static const struct of_device_id dt_match[] = {
179 { .compatible = "qcom,mdss-dsi-ctrl" },
180
181 /* Deprecated, don't use */
182 { .compatible = "qcom,dsi-ctrl-6g-qcm2290" },
183 {}
184};
185
186static const struct dev_pm_ops dsi_pm_ops = {
187 SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL)
188 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
189 pm_runtime_force_resume)
190};
191
192static struct platform_driver dsi_driver = {
193 .probe = dsi_dev_probe,
194 .remove_new = dsi_dev_remove,
195 .driver = {
196 .name = "msm_dsi",
197 .of_match_table = dt_match,
198 .pm = &dsi_pm_ops,
199 },
200};
201
202void __init msm_dsi_register(void)
203{
204 DBG("");
205 msm_dsi_phy_driver_register();
206 platform_driver_register(&dsi_driver);
207}
208
209void __exit msm_dsi_unregister(void)
210{
211 DBG("");
212 msm_dsi_phy_driver_unregister();
213 platform_driver_unregister(&dsi_driver);
214}
215
216int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
217 struct drm_encoder *encoder)
218{
219 struct drm_bridge *bridge;
220 int ret;
221
222 msm_dsi->dev = dev;
223
224 ret = msm_dsi_host_modeset_init(host: msm_dsi->host, dev);
225 if (ret) {
226 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret);
227 return ret;
228 }
229
230 if (msm_dsi_is_bonded_dsi(msm_dsi) &&
231 !msm_dsi_is_master_dsi(msm_dsi)) {
232 /*
233 * Do not return an eror here,
234 * Just skip creating encoder/connector for the slave-DSI.
235 */
236 return 0;
237 }
238
239 bridge = msm_dsi_manager_bridge_init(msm_dsi, encoder);
240 if (IS_ERR(ptr: bridge)) {
241 ret = PTR_ERR(ptr: bridge);
242 DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret);
243 return ret;
244 }
245
246 ret = msm_dsi_manager_ext_bridge_init(id: msm_dsi->id, int_bridge: bridge);
247 if (ret) {
248 DRM_DEV_ERROR(dev->dev,
249 "failed to create dsi connector: %d\n", ret);
250 return ret;
251 }
252
253 return 0;
254}
255
256void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi)
257{
258 msm_dsi_host_snapshot(disp_state, host: msm_dsi->host);
259 msm_dsi_phy_snapshot(disp_state, phy: msm_dsi->phy);
260}
261
262

source code of linux/drivers/gpu/drm/msm/dsi/dsi.c