summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/msm/dsi/dsi.c
blob: 6edcd6f57e70d4da4170f419d62fc5669a36ef29 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
/*
 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include "dsi.h"

struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
{
	if (!msm_dsi || !msm_dsi_device_connected(msm_dsi))
		return NULL;

	return (msm_dsi->device_flags & MIPI_DSI_MODE_VIDEO) ?
		msm_dsi->encoders[MSM_DSI_VIDEO_ENCODER_ID] :
		msm_dsi->encoders[MSM_DSI_CMD_ENCODER_ID];
}

static int dsi_get_phy(struct msm_dsi *msm_dsi)
{
	struct platform_device *pdev = msm_dsi->pdev;
	struct platform_device *phy_pdev;
	struct device_node *phy_node;

	phy_node = of_parse_phandle(pdev->dev.of_node, "qcom,dsi-phy", 0);
	if (!phy_node) {
		dev_err(&pdev->dev, "cannot find phy device\n");
		return -ENXIO;
	}

	phy_pdev = of_find_device_by_node(phy_node);
	if (phy_pdev)
		msm_dsi->phy = platform_get_drvdata(phy_pdev);

	of_node_put(phy_node);

	if (!phy_pdev || !msm_dsi->phy) {
		dev_err(&pdev->dev, "%s: phy driver is not ready\n", __func__);
		return -EPROBE_DEFER;
	}

	msm_dsi->phy_dev = get_device(&phy_pdev->dev);

	return 0;
}

static void dsi_destroy(struct msm_dsi *msm_dsi)
{
	if (!msm_dsi)
		return;

	msm_dsi_manager_unregister(msm_dsi);

	if (msm_dsi->phy_dev) {
		put_device(msm_dsi->phy_dev);
		msm_dsi->phy = NULL;
		msm_dsi->phy_dev = NULL;
	}

	if (msm_dsi->host) {
		msm_dsi_host_destroy(msm_dsi->host);
		msm_dsi->host = NULL;
	}

	platform_set_drvdata(msm_dsi->pdev, NULL);
}

static struct msm_dsi *dsi_init(struct platform_device *pdev)
{
	struct msm_dsi *msm_dsi;
	int ret;

	if (!pdev)
		return ERR_PTR(-ENXIO);

	msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
	if (!msm_dsi)
		return ERR_PTR(-ENOMEM);
	DBG("dsi probed=%p", msm_dsi);

	msm_dsi->pdev = pdev;
	platform_set_drvdata(pdev, msm_dsi);

	/* Init dsi host */
	ret = msm_dsi_host_init(msm_dsi);
	if (ret)
		goto destroy_dsi;

	/* GET dsi PHY */
	ret = dsi_get_phy(msm_dsi);
	if (ret)
		goto destroy_dsi;

	/* Register to dsi manager */
	ret = msm_dsi_manager_register(msm_dsi);
	if (ret)
		goto destroy_dsi;

	return msm_dsi;

destroy_dsi:
	dsi_destroy(msm_dsi);
	return ERR_PTR(ret);
}

static int dsi_bind(struct device *dev, struct device *master, void *data)
{
	struct drm_device *drm = dev_get_drvdata(master);
	struct msm_drm_private *priv = drm->dev_private;
	struct platform_device *pdev = to_platform_device(dev);
	struct msm_dsi *msm_dsi;

	DBG("");
	msm_dsi = dsi_init(pdev);
	if (IS_ERR(msm_dsi))
		return PTR_ERR(msm_dsi);

	priv->dsi[msm_dsi->id] = msm_dsi;

	return 0;
}

static void dsi_unbind(struct device *dev, struct device *master,
		void *data)
{
	struct drm_device *drm = dev_get_drvdata(master);
	struct msm_drm_private *priv = drm->dev_private;
	struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
	int id = msm_dsi->id;

	if (priv->dsi[id]) {
		dsi_destroy(msm_dsi);
		priv->dsi[id] = NULL;
	}
}

static const struct component_ops dsi_ops = {
	.bind   = dsi_bind,
	.unbind = dsi_unbind,
};

static int dsi_dev_probe(struct platform_device *pdev)
{
	return component_add(&pdev->dev, &dsi_ops);
}

static int dsi_dev_remove(struct platform_device *pdev)
{
	DBG("");
	component_del(&pdev->dev, &dsi_ops);
	return 0;
}

static const struct of_device_id dt_match[] = {
	{ .compatible = "qcom,mdss-dsi-ctrl" },
	{}
};

static struct platform_driver dsi_driver = {
	.probe = dsi_dev_probe,
	.remove = dsi_dev_remove,
	.driver = {
		.name = "msm_dsi",
		.of_match_table = dt_match,
	},
};

void __init msm_dsi_register(void)
{
	DBG("");
	msm_dsi_phy_driver_register();
	platform_driver_register(&dsi_driver);
}

void __exit msm_dsi_unregister(void)
{
	DBG("");
	msm_dsi_phy_driver_unregister();
	platform_driver_unregister(&dsi_driver);
}

int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
		struct drm_encoder *encoders[MSM_DSI_ENCODER_NUM])
{
	struct msm_drm_private *priv = dev->dev_private;
	struct drm_bridge *ext_bridge;
	int ret, i;

	if (WARN_ON(!encoders[MSM_DSI_VIDEO_ENCODER_ID] ||
		!encoders[MSM_DSI_CMD_ENCODER_ID]))
		return -EINVAL;

	msm_dsi->dev = dev;

	ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
	if (ret) {
		dev_err(dev->dev, "failed to modeset init host: %d\n", ret);
		goto fail;
	}

	msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id);
	if (IS_ERR(msm_dsi->bridge)) {
		ret = PTR_ERR(msm_dsi->bridge);
		dev_err(dev->dev, "failed to create dsi bridge: %d\n", ret);
		msm_dsi->bridge = NULL;
		goto fail;
	}

	for (i = 0; i < MSM_DSI_ENCODER_NUM; i++) {
		encoders[i]->bridge = msm_dsi->bridge;
		msm_dsi->encoders[i] = encoders[i];
	}

	/*
	 * check if the dsi encoder output is connected to a panel or an
	 * external bridge. We create a connector only if we're connected to a
	 * drm_panel device. When we're connected to an external bridge, we
	 * assume that the drm_bridge driver will create the connector itself.
	 */
	ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);

	if (ext_bridge)
		msm_dsi->connector =
			msm_dsi_manager_ext_bridge_init(msm_dsi->id);
	else
		msm_dsi->connector =
			msm_dsi_manager_connector_init(msm_dsi->id);

	if (IS_ERR(msm_dsi->connector)) {
		ret = PTR_ERR(msm_dsi->connector);
		dev_err(dev->dev,
			"failed to create dsi connector: %d\n", ret);
		msm_dsi->connector = NULL;
		goto fail;
	}

	priv->bridges[priv->num_bridges++]       = msm_dsi->bridge;
	priv->connectors[priv->num_connectors++] = msm_dsi->connector;

	return 0;
fail:
	if (msm_dsi) {
		/* bridge/connector are normally destroyed by drm: */
		if (msm_dsi->bridge) {
			msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
			msm_dsi->bridge = NULL;
		}

		/* don't destroy connector if we didn't make it */
		if (msm_dsi->connector && !msm_dsi->external_bridge)
			msm_dsi->connector->funcs->destroy(msm_dsi->connector);

		msm_dsi->connector = NULL;
	}

	return ret;
}