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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
8struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
9{
10 if (!msm_dsi || !msm_dsi_device_connected(msm_dsi))
11 return NULL;
12
13 return msm_dsi->encoder;
14}
15
16static int dsi_get_phy(struct msm_dsi *msm_dsi)
17{
18 struct platform_device *pdev = msm_dsi->pdev;
19 struct platform_device *phy_pdev;
20 struct device_node *phy_node;
21
22 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
23 if (!phy_node) {
24 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n");
25 return -ENXIO;
26 }
27
28 phy_pdev = of_find_device_by_node(phy_node);
29 if (phy_pdev)
30 msm_dsi->phy = platform_get_drvdata(phy_pdev);
31
32 of_node_put(phy_node);
33
34 if (!phy_pdev || !msm_dsi->phy) {
35 DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
36 return -EPROBE_DEFER;
37 }
38
39 msm_dsi->phy_dev = get_device(&phy_pdev->dev);
40
41 return 0;
42}
43
44static void dsi_destroy(struct msm_dsi *msm_dsi)
45{
46 if (!msm_dsi)
47 return;
48
49 msm_dsi_manager_unregister(msm_dsi);
50
51 if (msm_dsi->phy_dev) {
52 put_device(msm_dsi->phy_dev);
53 msm_dsi->phy = NULL;
54 msm_dsi->phy_dev = NULL;
55 }
56
57 if (msm_dsi->host) {
58 msm_dsi_host_destroy(msm_dsi->host);
59 msm_dsi->host = NULL;
60 }
61
62 platform_set_drvdata(msm_dsi->pdev, NULL);
63}
64
65static struct msm_dsi *dsi_init(struct platform_device *pdev)
66{
67 struct msm_dsi *msm_dsi;
68 int ret;
69
70 if (!pdev)
71 return ERR_PTR(-ENXIO);
72
73 msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
74 if (!msm_dsi)
75 return ERR_PTR(-ENOMEM);
76 DBG("dsi probed=%p", msm_dsi);
77
78 msm_dsi->id = -1;
79 msm_dsi->pdev = pdev;
80 platform_set_drvdata(pdev, msm_dsi);
81
82 /* Init dsi host */
83 ret = msm_dsi_host_init(msm_dsi);
84 if (ret)
85 goto destroy_dsi;
86
87 /* GET dsi PHY */
88 ret = dsi_get_phy(msm_dsi);
89 if (ret)
90 goto destroy_dsi;
91
92 /* Register to dsi manager */
93 ret = msm_dsi_manager_register(msm_dsi);
94 if (ret)
95 goto destroy_dsi;
96
97 return msm_dsi;
98
99destroy_dsi:
100 dsi_destroy(msm_dsi);
101 return ERR_PTR(ret);
102}
103
104static int dsi_bind(struct device *dev, struct device *master, void *data)
105{
106 struct drm_device *drm = dev_get_drvdata(master);
107 struct msm_drm_private *priv = drm->dev_private;
108 struct platform_device *pdev = to_platform_device(dev);
109 struct msm_dsi *msm_dsi;
110
111 DBG("");
112 msm_dsi = dsi_init(pdev);
113 if (IS_ERR(msm_dsi)) {
114 /* Don't fail the bind if the dsi port is not connected */
115 if (PTR_ERR(msm_dsi) == -ENODEV)
116 return 0;
117 else
118 return PTR_ERR(msm_dsi);
119 }
120
121 priv->dsi[msm_dsi->id] = msm_dsi;
122
123 return 0;
124}
125
126static void dsi_unbind(struct device *dev, struct device *master,
127 void *data)
128{
129 struct drm_device *drm = dev_get_drvdata(master);
130 struct msm_drm_private *priv = drm->dev_private;
131 struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
132 int id = msm_dsi->id;
133
134 if (priv->dsi[id]) {
135 dsi_destroy(msm_dsi);
136 priv->dsi[id] = NULL;
137 }
138}
139
140static const struct component_ops dsi_ops = {
141 .bind = dsi_bind,
142 .unbind = dsi_unbind,
143};
144
145static int dsi_dev_probe(struct platform_device *pdev)
146{
147 return component_add(&pdev->dev, &dsi_ops);
148}
149
150static int dsi_dev_remove(struct platform_device *pdev)
151{
152 DBG("");
153 component_del(&pdev->dev, &dsi_ops);
154 return 0;
155}
156
157static const struct of_device_id dt_match[] = {
158 { .compatible = "qcom,mdss-dsi-ctrl" },
159 {}
160};
161
162static const struct dev_pm_ops dsi_pm_ops = {
163 SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL)
164};
165
166static struct platform_driver dsi_driver = {
167 .probe = dsi_dev_probe,
168 .remove = dsi_dev_remove,
169 .driver = {
170 .name = "msm_dsi",
171 .of_match_table = dt_match,
172 .pm = &dsi_pm_ops,
173 },
174};
175
176void __init msm_dsi_register(void)
177{
178 DBG("");
179 msm_dsi_phy_driver_register();
180 platform_driver_register(&dsi_driver);
181}
182
183void __exit msm_dsi_unregister(void)
184{
185 DBG("");
186 msm_dsi_phy_driver_unregister();
187 platform_driver_unregister(&dsi_driver);
188}
189
190int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
191 struct drm_encoder *encoder)
192{
193 struct msm_drm_private *priv;
194 struct drm_bridge *ext_bridge;
195 int ret;
196
197 if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev))
198 return -EINVAL;
199
200 priv = dev->dev_private;
201 msm_dsi->dev = dev;
202
203 ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
204 if (ret) {
205 DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret);
206 goto fail;
207 }
208
209 if (!msm_dsi_manager_validate_current_config(msm_dsi->id))
210 goto fail;
211
212 msm_dsi->encoder = encoder;
213
214 msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id);
215 if (IS_ERR(msm_dsi->bridge)) {
216 ret = PTR_ERR(msm_dsi->bridge);
217 DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret);
218 msm_dsi->bridge = NULL;
219 goto fail;
220 }
221
222 /*
223 * check if the dsi encoder output is connected to a panel or an
224 * external bridge. We create a connector only if we're connected to a
225 * drm_panel device. When we're connected to an external bridge, we
226 * assume that the drm_bridge driver will create the connector itself.
227 */
228 ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
229
230 if (ext_bridge)
231 msm_dsi->connector =
232 msm_dsi_manager_ext_bridge_init(msm_dsi->id);
233 else
234 msm_dsi->connector =
235 msm_dsi_manager_connector_init(msm_dsi->id);
236
237 if (IS_ERR(msm_dsi->connector)) {
238 ret = PTR_ERR(msm_dsi->connector);
239 DRM_DEV_ERROR(dev->dev,
240 "failed to create dsi connector: %d\n", ret);
241 msm_dsi->connector = NULL;
242 goto fail;
243 }
244
245 msm_dsi_manager_setup_encoder(msm_dsi->id);
246
247 priv->bridges[priv->num_bridges++] = msm_dsi->bridge;
248 priv->connectors[priv->num_connectors++] = msm_dsi->connector;
249
250 return 0;
251fail:
252 /* bridge/connector are normally destroyed by drm: */
253 if (msm_dsi->bridge) {
254 msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
255 msm_dsi->bridge = NULL;
256 }
257
258 /* don't destroy connector if we didn't make it */
259 if (msm_dsi->connector && !msm_dsi->external_bridge)
260 msm_dsi->connector->funcs->destroy(msm_dsi->connector);
261
262 msm_dsi->connector = NULL;
263
264 return ret;
265}
266
1/*
2 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14#include "dsi.h"
15
16struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
17{
18 if (!msm_dsi || !msm_dsi_device_connected(msm_dsi))
19 return NULL;
20
21 return msm_dsi->encoder;
22}
23
24static int dsi_get_phy(struct msm_dsi *msm_dsi)
25{
26 struct platform_device *pdev = msm_dsi->pdev;
27 struct platform_device *phy_pdev;
28 struct device_node *phy_node;
29
30 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
31 if (!phy_node) {
32 dev_err(&pdev->dev, "cannot find phy device\n");
33 return -ENXIO;
34 }
35
36 phy_pdev = of_find_device_by_node(phy_node);
37 if (phy_pdev)
38 msm_dsi->phy = platform_get_drvdata(phy_pdev);
39
40 of_node_put(phy_node);
41
42 if (!phy_pdev || !msm_dsi->phy) {
43 dev_err(&pdev->dev, "%s: phy driver is not ready\n", __func__);
44 return -EPROBE_DEFER;
45 }
46
47 msm_dsi->phy_dev = get_device(&phy_pdev->dev);
48
49 return 0;
50}
51
52static void dsi_destroy(struct msm_dsi *msm_dsi)
53{
54 if (!msm_dsi)
55 return;
56
57 msm_dsi_manager_unregister(msm_dsi);
58
59 if (msm_dsi->phy_dev) {
60 put_device(msm_dsi->phy_dev);
61 msm_dsi->phy = NULL;
62 msm_dsi->phy_dev = NULL;
63 }
64
65 if (msm_dsi->host) {
66 msm_dsi_host_destroy(msm_dsi->host);
67 msm_dsi->host = NULL;
68 }
69
70 platform_set_drvdata(msm_dsi->pdev, NULL);
71}
72
73static struct msm_dsi *dsi_init(struct platform_device *pdev)
74{
75 struct msm_dsi *msm_dsi;
76 int ret;
77
78 if (!pdev)
79 return ERR_PTR(-ENXIO);
80
81 msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
82 if (!msm_dsi)
83 return ERR_PTR(-ENOMEM);
84 DBG("dsi probed=%p", msm_dsi);
85
86 msm_dsi->pdev = pdev;
87 platform_set_drvdata(pdev, msm_dsi);
88
89 /* Init dsi host */
90 ret = msm_dsi_host_init(msm_dsi);
91 if (ret)
92 goto destroy_dsi;
93
94 /* GET dsi PHY */
95 ret = dsi_get_phy(msm_dsi);
96 if (ret)
97 goto destroy_dsi;
98
99 /* Register to dsi manager */
100 ret = msm_dsi_manager_register(msm_dsi);
101 if (ret)
102 goto destroy_dsi;
103
104 return msm_dsi;
105
106destroy_dsi:
107 dsi_destroy(msm_dsi);
108 return ERR_PTR(ret);
109}
110
111static int dsi_bind(struct device *dev, struct device *master, void *data)
112{
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;
117
118 DBG("");
119 msm_dsi = dsi_init(pdev);
120 if (IS_ERR(msm_dsi))
121 return PTR_ERR(msm_dsi);
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 drm_device *drm = dev_get_drvdata(master);
132 struct msm_drm_private *priv = drm->dev_private;
133 struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
134 int id = msm_dsi->id;
135
136 if (priv->dsi[id]) {
137 dsi_destroy(msm_dsi);
138 priv->dsi[id] = NULL;
139 }
140}
141
142static const struct component_ops dsi_ops = {
143 .bind = dsi_bind,
144 .unbind = dsi_unbind,
145};
146
147static int dsi_dev_probe(struct platform_device *pdev)
148{
149 return component_add(&pdev->dev, &dsi_ops);
150}
151
152static int dsi_dev_remove(struct platform_device *pdev)
153{
154 DBG("");
155 component_del(&pdev->dev, &dsi_ops);
156 return 0;
157}
158
159static const struct of_device_id dt_match[] = {
160 { .compatible = "qcom,mdss-dsi-ctrl" },
161 {}
162};
163
164static const struct dev_pm_ops dsi_pm_ops = {
165 SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL)
166};
167
168static struct platform_driver dsi_driver = {
169 .probe = dsi_dev_probe,
170 .remove = dsi_dev_remove,
171 .driver = {
172 .name = "msm_dsi",
173 .of_match_table = dt_match,
174 .pm = &dsi_pm_ops,
175 },
176};
177
178void __init msm_dsi_register(void)
179{
180 DBG("");
181 msm_dsi_phy_driver_register();
182 platform_driver_register(&dsi_driver);
183}
184
185void __exit msm_dsi_unregister(void)
186{
187 DBG("");
188 msm_dsi_phy_driver_unregister();
189 platform_driver_unregister(&dsi_driver);
190}
191
192int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
193 struct drm_encoder *encoder)
194{
195 struct msm_drm_private *priv;
196 struct drm_bridge *ext_bridge;
197 int ret;
198
199 if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev))
200 return -EINVAL;
201
202 priv = dev->dev_private;
203 msm_dsi->dev = dev;
204
205 ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
206 if (ret) {
207 dev_err(dev->dev, "failed to modeset init host: %d\n", ret);
208 goto fail;
209 }
210
211 msm_dsi->encoder = encoder;
212
213 msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id);
214 if (IS_ERR(msm_dsi->bridge)) {
215 ret = PTR_ERR(msm_dsi->bridge);
216 dev_err(dev->dev, "failed to create dsi bridge: %d\n", ret);
217 msm_dsi->bridge = NULL;
218 goto fail;
219 }
220
221 /*
222 * check if the dsi encoder output is connected to a panel or an
223 * external bridge. We create a connector only if we're connected to a
224 * drm_panel device. When we're connected to an external bridge, we
225 * assume that the drm_bridge driver will create the connector itself.
226 */
227 ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
228
229 if (ext_bridge)
230 msm_dsi->connector =
231 msm_dsi_manager_ext_bridge_init(msm_dsi->id);
232 else
233 msm_dsi->connector =
234 msm_dsi_manager_connector_init(msm_dsi->id);
235
236 if (IS_ERR(msm_dsi->connector)) {
237 ret = PTR_ERR(msm_dsi->connector);
238 dev_err(dev->dev,
239 "failed to create dsi connector: %d\n", ret);
240 msm_dsi->connector = NULL;
241 goto fail;
242 }
243
244 priv->bridges[priv->num_bridges++] = msm_dsi->bridge;
245 priv->connectors[priv->num_connectors++] = msm_dsi->connector;
246
247 return 0;
248fail:
249 /* bridge/connector are normally destroyed by drm: */
250 if (msm_dsi->bridge) {
251 msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
252 msm_dsi->bridge = NULL;
253 }
254
255 /* don't destroy connector if we didn't make it */
256 if (msm_dsi->connector && !msm_dsi->external_bridge)
257 msm_dsi->connector->funcs->destroy(msm_dsi->connector);
258
259 msm_dsi->connector = NULL;
260
261 return ret;
262}
263