summaryrefslogtreecommitdiff
path: root/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
blob: 7d9eb2b1f5af39c8ad9433435c5ed3bb0315ffd6 (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
/*
 * LCD panel driver for Sharp LS037V7DW01
 *
 * Copyright (C) 2008 Nokia Corporation
 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.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/module.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/err.h>
#include <linux/slab.h>

#include <plat/display.h>

struct sharp_data {
	struct backlight_device *bl;
};

static struct omap_video_timings sharp_ls_timings = {
	.x_res = 480,
	.y_res = 640,

	.pixel_clock	= 19200,

	.hsw		= 2,
	.hfp		= 1,
	.hbp		= 28,

	.vsw		= 1,
	.vfp		= 1,
	.vbp		= 1,
};

static int sharp_ls_bl_update_status(struct backlight_device *bl)
{
	struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev);
	int level;

	if (!dssdev->set_backlight)
		return -EINVAL;

	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
			bl->props.power == FB_BLANK_UNBLANK)
		level = bl->props.brightness;
	else
		level = 0;

	return dssdev->set_backlight(dssdev, level);
}

static int sharp_ls_bl_get_brightness(struct backlight_device *bl)
{
	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
			bl->props.power == FB_BLANK_UNBLANK)
		return bl->props.brightness;

	return 0;
}

static const struct backlight_ops sharp_ls_bl_ops = {
	.get_brightness = sharp_ls_bl_get_brightness,
	.update_status  = sharp_ls_bl_update_status,
};



static int sharp_ls_panel_probe(struct omap_dss_device *dssdev)
{
	struct backlight_properties props;
	struct backlight_device *bl;
	struct sharp_data *sd;
	int r;

	dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
		OMAP_DSS_LCD_IHS;
	dssdev->panel.acb = 0x28;
	dssdev->panel.timings = sharp_ls_timings;

	sd = kzalloc(sizeof(*sd), GFP_KERNEL);
	if (!sd)
		return -ENOMEM;

	dev_set_drvdata(&dssdev->dev, sd);

	memset(&props, 0, sizeof(struct backlight_properties));
	props.max_brightness = dssdev->max_backlight_level;

	bl = backlight_device_register("sharp-ls", &dssdev->dev, dssdev,
			&sharp_ls_bl_ops, &props);
	if (IS_ERR(bl)) {
		r = PTR_ERR(bl);
		kfree(sd);
		return r;
	}
	sd->bl = bl;

	bl->props.fb_blank = FB_BLANK_UNBLANK;
	bl->props.power = FB_BLANK_UNBLANK;
	bl->props.brightness = dssdev->max_backlight_level;
	r = sharp_ls_bl_update_status(bl);
	if (r < 0)
		dev_err(&dssdev->dev, "failed to set lcd brightness\n");

	return 0;
}

static void sharp_ls_panel_remove(struct omap_dss_device *dssdev)
{
	struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);
	struct backlight_device *bl = sd->bl;

	bl->props.power = FB_BLANK_POWERDOWN;
	sharp_ls_bl_update_status(bl);
	backlight_device_unregister(bl);

	kfree(sd);
}

static int sharp_ls_power_on(struct omap_dss_device *dssdev)
{
	int r = 0;

	r = omapdss_dpi_display_enable(dssdev);
	if (r)
		goto err0;

	/* wait couple of vsyncs until enabling the LCD */
	msleep(50);

	if (dssdev->platform_enable) {
		r = dssdev->platform_enable(dssdev);
		if (r)
			goto err1;
	}

	return 0;
err1:
	omapdss_dpi_display_disable(dssdev);
err0:
	return r;
}

static void sharp_ls_power_off(struct omap_dss_device *dssdev)
{
	if (dssdev->platform_disable)
		dssdev->platform_disable(dssdev);

	/* wait at least 5 vsyncs after disabling the LCD */

	msleep(100);

	omapdss_dpi_display_disable(dssdev);
}

static int sharp_ls_panel_enable(struct omap_dss_device *dssdev)
{
	int r;
	r = sharp_ls_power_on(dssdev);
	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
	return r;
}

static void sharp_ls_panel_disable(struct omap_dss_device *dssdev)
{
	sharp_ls_power_off(dssdev);
	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}

static int sharp_ls_panel_suspend(struct omap_dss_device *dssdev)
{
	sharp_ls_power_off(dssdev);
	dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
	return 0;
}

static int sharp_ls_panel_resume(struct omap_dss_device *dssdev)
{
	int r;
	r = sharp_ls_power_on(dssdev);
	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
	return r;
}

static struct omap_dss_driver sharp_ls_driver = {
	.probe		= sharp_ls_panel_probe,
	.remove		= sharp_ls_panel_remove,

	.enable		= sharp_ls_panel_enable,
	.disable	= sharp_ls_panel_disable,
	.suspend	= sharp_ls_panel_suspend,
	.resume		= sharp_ls_panel_resume,

	.driver         = {
		.name   = "sharp_ls_panel",
		.owner  = THIS_MODULE,
	},
};

static int __init sharp_ls_panel_drv_init(void)
{
	return omap_dss_register_driver(&sharp_ls_driver);
}

static void __exit sharp_ls_panel_drv_exit(void)
{
	omap_dss_unregister_driver(&sharp_ls_driver);
}

module_init(sharp_ls_panel_drv_init);
module_exit(sharp_ls_panel_drv_exit);
MODULE_LICENSE("GPL");