summaryrefslogtreecommitdiff
path: root/drivers/video/omap2/dss/output.c
blob: 813f26682b7a836f127449517f9ed82dd2c33dac (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
/*
 * Copyright (C) 2012 Texas Instruments Ltd
 * Author: Archit Taneja <archit@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <video/omapdss.h>

#include "dss.h"

static LIST_HEAD(output_list);
static DEFINE_MUTEX(output_lock);

int omapdss_output_set_device(struct omap_dss_output *out,
		struct omap_dss_device *dssdev)
{
	int r;

	mutex_lock(&output_lock);

	if (out->device) {
		DSSERR("output already has device %s connected to it\n",
			out->device->name);
		r = -EINVAL;
		goto err;
	}

	if (out->type != dssdev->type) {
		DSSERR("output type and display type don't match\n");
		r = -EINVAL;
		goto err;
	}

	out->device = dssdev;
	dssdev->output = out;

	mutex_unlock(&output_lock);

	return 0;
err:
	mutex_unlock(&output_lock);

	return r;
}
EXPORT_SYMBOL(omapdss_output_set_device);

int omapdss_output_unset_device(struct omap_dss_output *out)
{
	int r;

	mutex_lock(&output_lock);

	if (!out->device) {
		DSSERR("output doesn't have a device connected to it\n");
		r = -EINVAL;
		goto err;
	}

	if (out->device->state != OMAP_DSS_DISPLAY_DISABLED) {
		DSSERR("device %s is not disabled, cannot unset device\n",
				out->device->name);
		r = -EINVAL;
		goto err;
	}

	out->device->output = NULL;
	out->device = NULL;

	mutex_unlock(&output_lock);

	return 0;
err:
	mutex_unlock(&output_lock);

	return r;
}
EXPORT_SYMBOL(omapdss_output_unset_device);

void dss_register_output(struct omap_dss_output *out)
{
	list_add_tail(&out->list, &output_list);
}

void dss_unregister_output(struct omap_dss_output *out)
{
	list_del(&out->list);
}

struct omap_dss_output *omap_dss_get_output(enum omap_dss_output_id id)
{
	struct omap_dss_output *out;

	list_for_each_entry(out, &output_list, list) {
		if (out->id == id)
			return out;
	}

	return NULL;
}

struct omap_dss_output *omapdss_get_output_from_dssdev(struct omap_dss_device *dssdev)
{
	struct omap_dss_output *out = NULL;
	enum omap_dss_output_id id;

	switch (dssdev->type) {
	case OMAP_DISPLAY_TYPE_DPI:
		out = omap_dss_get_output(OMAP_DSS_OUTPUT_DPI);
		break;
	case OMAP_DISPLAY_TYPE_DBI:
		out = omap_dss_get_output(OMAP_DSS_OUTPUT_DBI);
		break;
	case OMAP_DISPLAY_TYPE_SDI:
		out = omap_dss_get_output(OMAP_DSS_OUTPUT_SDI);
		break;
	case OMAP_DISPLAY_TYPE_VENC:
		out = omap_dss_get_output(OMAP_DSS_OUTPUT_VENC);
		break;
	case OMAP_DISPLAY_TYPE_HDMI:
		out = omap_dss_get_output(OMAP_DSS_OUTPUT_HDMI);
		break;
	case OMAP_DISPLAY_TYPE_DSI:
		id = dssdev->phy.dsi.module == 0 ? OMAP_DSS_OUTPUT_DSI1 :
					OMAP_DSS_OUTPUT_DSI2;
		out = omap_dss_get_output(id);
		break;
	default:
		break;
	}

	return out;
}