2 * linux/drivers/video/omap2/dss/sdi.c
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #define DSS_SUBSYS_NAME "SDI"
22 #include <linux/kernel.h>
23 #include <linux/delay.h>
24 #include <linux/err.h>
25 #include <linux/regulator/consumer.h>
27 #include <video/omapdss.h>
32 struct regulator
*vdds_sdi_reg
;
35 static void sdi_basic_init(struct omap_dss_device
*dssdev
)
38 dispc_set_parallel_interface_mode(dssdev
->manager
->id
,
39 OMAP_DSS_PARALLELMODE_BYPASS
);
41 dispc_set_lcd_display_type(dssdev
->manager
->id
,
42 OMAP_DSS_LCD_DISPLAY_TFT
);
44 dispc_set_tft_data_lines(dssdev
->manager
->id
, 24);
45 dispc_lcd_enable_signal_polarity(1);
48 int omapdss_sdi_display_enable(struct omap_dss_device
*dssdev
)
50 struct omap_video_timings
*t
= &dssdev
->panel
.timings
;
51 struct dss_clock_info dss_cinfo
;
52 struct dispc_clock_info dispc_cinfo
;
58 if (dssdev
->manager
== NULL
) {
59 DSSERR("failed to enable display: no manager\n");
63 r
= omap_dss_start_device(dssdev
);
65 DSSERR("failed to start device\n");
69 r
= regulator_enable(sdi
.vdds_sdi_reg
);
73 r
= dss_runtime_get();
77 r
= dispc_runtime_get();
81 sdi_basic_init(dssdev
);
84 dssdev
->panel
.config
|= OMAP_DSS_LCD_RF
| OMAP_DSS_LCD_ONOFF
;
86 dispc_set_pol_freq(dssdev
->manager
->id
, dssdev
->panel
.config
,
87 dssdev
->panel
.acbi
, dssdev
->panel
.acb
);
89 r
= dss_calc_clock_div(1, t
->pixel_clock
* 1000,
90 &dss_cinfo
, &dispc_cinfo
);
92 goto err_calc_clock_div
;
95 lck_div
= dispc_cinfo
.lck_div
;
96 pck_div
= dispc_cinfo
.pck_div
;
98 pck
= fck
/ lck_div
/ pck_div
/ 1000;
100 if (pck
!= t
->pixel_clock
) {
101 DSSWARN("Could not find exact pixel clock. Requested %d kHz, "
103 t
->pixel_clock
, pck
);
105 t
->pixel_clock
= pck
;
109 dispc_set_lcd_timings(dssdev
->manager
->id
, t
);
111 r
= dss_set_clock_div(&dss_cinfo
);
113 goto err_set_dss_clock_div
;
115 r
= dispc_set_clock_div(dssdev
->manager
->id
, &dispc_cinfo
);
117 goto err_set_dispc_clock_div
;
119 dss_sdi_init(dssdev
->phy
.sdi
.datapairs
);
120 r
= dss_sdi_enable();
125 dssdev
->manager
->enable(dssdev
->manager
);
130 err_set_dispc_clock_div
:
131 err_set_dss_clock_div
:
137 regulator_disable(sdi
.vdds_sdi_reg
);
139 omap_dss_stop_device(dssdev
);
143 EXPORT_SYMBOL(omapdss_sdi_display_enable
);
145 void omapdss_sdi_display_disable(struct omap_dss_device
*dssdev
)
147 dssdev
->manager
->disable(dssdev
->manager
);
154 regulator_disable(sdi
.vdds_sdi_reg
);
156 omap_dss_stop_device(dssdev
);
158 EXPORT_SYMBOL(omapdss_sdi_display_disable
);
160 int sdi_init_display(struct omap_dss_device
*dssdev
)
162 DSSDBG("SDI init\n");
164 if (sdi
.vdds_sdi_reg
== NULL
) {
165 struct regulator
*vdds_sdi
;
167 vdds_sdi
= dss_get_vdds_sdi();
169 if (IS_ERR(vdds_sdi
)) {
170 DSSERR("can't get VDDS_SDI regulator\n");
171 return PTR_ERR(vdds_sdi
);
174 sdi
.vdds_sdi_reg
= vdds_sdi
;