summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/gpu/drm/msm/edp/edp.c
blob: 0940e84b2821b6df619b901f4c25f2fbf9297828 (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
/*
 * Copyright (c) 2014-2015, 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 <linux/of_irq.h>
#include "edp.h"

static irqreturn_t edp_irq(int irq, void *dev_id)
{
	struct msm_edp *edp = dev_id;

	/* Process eDP irq */
	return msm_edp_ctrl_irq(edp->ctrl);
}

static void edp_destroy(struct platform_device *pdev)
{
	struct msm_edp *edp = platform_get_drvdata(pdev);

	if (!edp)
		return;

	if (edp->ctrl) {
		msm_edp_ctrl_destroy(edp->ctrl);
		edp->ctrl = NULL;
	}

	platform_set_drvdata(pdev, NULL);
}

/* construct eDP at bind/probe time, grab all the resources. */
static struct msm_edp *edp_init(struct platform_device *pdev)
{
	struct msm_edp *edp = NULL;
	int ret;

	if (!pdev) {
		pr_err("no eDP device\n");
		ret = -ENXIO;
		goto fail;
	}

	edp = devm_kzalloc(&pdev->dev, sizeof(*edp), GFP_KERNEL);
	if (!edp) {
		ret = -ENOMEM;
		goto fail;
	}
	DBG("eDP probed=%p", edp);

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

	ret = msm_edp_ctrl_init(edp);
	if (ret)
		goto fail;

	return edp;

fail:
	if (edp)
		edp_destroy(pdev);

	return ERR_PTR(ret);
}

static int edp_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 msm_edp *edp;

	DBG("");
	edp = edp_init(to_platform_device(dev));
	if (IS_ERR(edp))
		return PTR_ERR(edp);
	priv->edp = edp;

	return 0;
}

static void edp_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;

	DBG("");
	if (priv->edp) {
		edp_destroy(to_platform_device(dev));
		priv->edp = NULL;
	}
}

static const struct component_ops edp_ops = {
		.bind   = edp_bind,
		.unbind = edp_unbind,
};

static int edp_dev_probe(struct platform_device *pdev)
{
	DBG("");
	return component_add(&pdev->dev, &edp_ops);
}

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

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

static struct platform_driver edp_driver = {
	.probe = edp_dev_probe,
	.remove = edp_dev_remove,
	.driver = {
		.name = "msm_edp",
		.of_match_table = dt_match,
	},
};

void __init msm_edp_register(void)
{
	DBG("");
	platform_driver_register(&edp_driver);
}

void __exit msm_edp_unregister(void)
{
	DBG("");
	platform_driver_unregister(&edp_driver);
}

/* Second part of initialization, the drm/kms level modeset_init */
int msm_edp_modeset_init(struct msm_edp *edp, struct drm_device *dev,
				struct drm_encoder *encoder)
{
	struct platform_device *pdev = edp->pdev;
	struct msm_drm_private *priv = dev->dev_private;
	int ret;

	edp->encoder = encoder;
	edp->dev = dev;

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

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

	edp->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
	if (edp->irq < 0) {
		ret = edp->irq;
		dev_err(dev->dev, "failed to get IRQ: %d\n", ret);
		goto fail;
	}

	ret = devm_request_irq(&pdev->dev, edp->irq,
			edp_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
			"edp_isr", edp);
	if (ret < 0) {
		dev_err(dev->dev, "failed to request IRQ%u: %d\n",
				edp->irq, ret);
		goto fail;
	}

	encoder->bridge = edp->bridge;

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

	return 0;

fail:
	/* bridge/connector are normally destroyed by drm */
	if (edp->bridge) {
		edp_bridge_destroy(edp->bridge);
		edp->bridge = NULL;
	}
	if (edp->connector) {
		edp->connector->funcs->destroy(edp->connector);
		edp->connector = NULL;
	}

	return ret;
}