summaryrefslogtreecommitdiff
path: root/drivers/video/omap2/dss/sdi.c
blob: b64adf7dfc88b20963829245e0061c6ad1df4960 (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
/*
 * linux/drivers/video/omap2/dss/sdi.c
 *
 * Copyright (C) 2009 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/>.
 */

#define DSS_SUBSYS_NAME "SDI"

#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/regulator/consumer.h>

#include <plat/display.h>
#include <plat/cpu.h>
#include "dss.h"

static struct {
	bool skip_init;
	bool update_enabled;
	struct regulator *vdds_sdi_reg;
} sdi;

static void sdi_basic_init(struct omap_dss_device *dssdev)

{
	dispc_set_parallel_interface_mode(dssdev->manager->id,
			OMAP_DSS_PARALLELMODE_BYPASS);

	dispc_set_lcd_display_type(dssdev->manager->id,
			OMAP_DSS_LCD_DISPLAY_TFT);

	dispc_set_tft_data_lines(dssdev->manager->id, 24);
	dispc_lcd_enable_signal_polarity(1);
}

int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
{
	struct omap_video_timings *t = &dssdev->panel.timings;
	struct dss_clock_info dss_cinfo;
	struct dispc_clock_info dispc_cinfo;
	u16 lck_div, pck_div;
	unsigned long fck;
	unsigned long pck;
	int r;

	r = omap_dss_start_device(dssdev);
	if (r) {
		DSSERR("failed to start device\n");
		goto err0;
	}

	r = regulator_enable(sdi.vdds_sdi_reg);
	if (r)
		goto err1;

	/* In case of skip_init sdi_init has already enabled the clocks */
	if (!sdi.skip_init)
		dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);

	sdi_basic_init(dssdev);

	/* 15.5.9.1.2 */
	dssdev->panel.config |= OMAP_DSS_LCD_RF | OMAP_DSS_LCD_ONOFF;

	dispc_set_pol_freq(dssdev->manager->id, dssdev->panel.config,
			dssdev->panel.acbi, dssdev->panel.acb);

	if (!sdi.skip_init) {
		r = dss_calc_clock_div(1, t->pixel_clock * 1000,
				&dss_cinfo, &dispc_cinfo);
	} else {
		r = dss_get_clock_div(&dss_cinfo);
		r = dispc_get_clock_div(dssdev->manager->id, &dispc_cinfo);
	}

	if (r)
		goto err2;

	fck = dss_cinfo.fck;
	lck_div = dispc_cinfo.lck_div;
	pck_div = dispc_cinfo.pck_div;

	pck = fck / lck_div / pck_div / 1000;

	if (pck != t->pixel_clock) {
		DSSWARN("Could not find exact pixel clock. Requested %d kHz, "
				"got %lu kHz\n",
				t->pixel_clock, pck);

		t->pixel_clock = pck;
	}


	dispc_set_lcd_timings(dssdev->manager->id, t);

	r = dss_set_clock_div(&dss_cinfo);
	if (r)
		goto err2;

	r = dispc_set_clock_div(dssdev->manager->id, &dispc_cinfo);
	if (r)
		goto err2;

	if (!sdi.skip_init) {
		dss_sdi_init(dssdev->phy.sdi.datapairs);
		r = dss_sdi_enable();
		if (r)
			goto err1;
		mdelay(2);
	}

	dssdev->manager->enable(dssdev->manager);

	sdi.skip_init = 0;

	return 0;
err2:
	dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
	regulator_disable(sdi.vdds_sdi_reg);
err1:
	omap_dss_stop_device(dssdev);
err0:
	return r;
}
EXPORT_SYMBOL(omapdss_sdi_display_enable);

void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)
{
	dssdev->manager->disable(dssdev->manager);

	dss_sdi_disable();

	dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);

	regulator_disable(sdi.vdds_sdi_reg);

	omap_dss_stop_device(dssdev);
}
EXPORT_SYMBOL(omapdss_sdi_display_disable);

int sdi_init_display(struct omap_dss_device *dssdev)
{
	DSSDBG("SDI init\n");

	return 0;
}

int sdi_init(bool skip_init)
{
	/* we store this for first display enable, then clear it */
	sdi.skip_init = skip_init;

	sdi.vdds_sdi_reg = dss_get_vdds_sdi();
	if (IS_ERR(sdi.vdds_sdi_reg)) {
		DSSERR("can't get VDDS_SDI regulator\n");
		return PTR_ERR(sdi.vdds_sdi_reg);
	}
	/*
	 * Enable clocks already here, otherwise there would be a toggle
	 * of them until sdi_display_enable is called.
	 */
	if (skip_init)
		dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
	return 0;
}

void sdi_exit(void)
{
}