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 r = omap_dss_start_device(dssdev);
60 DSSERR("failed to start device\n");
64 r = regulator_enable(sdi.vdds_sdi_reg);
68 r = dss_runtime_get();
72 r = dispc_runtime_get();
76 sdi_basic_init(dssdev);
79 dssdev->panel.config |= OMAP_DSS_LCD_RF | OMAP_DSS_LCD_ONOFF;
81 dispc_set_pol_freq(dssdev->manager->id, dssdev->panel.config,
82 dssdev->panel.acbi, dssdev->panel.acb);
84 r = dss_calc_clock_div(1, t->pixel_clock * 1000,
85 &dss_cinfo, &dispc_cinfo);
87 goto err_calc_clock_div;
90 lck_div = dispc_cinfo.lck_div;
91 pck_div = dispc_cinfo.pck_div;
93 pck = fck / lck_div / pck_div / 1000;
95 if (pck != t->pixel_clock) {
96 DSSWARN("Could not find exact pixel clock. Requested %d kHz, "
100 t->pixel_clock = pck;
104 dispc_set_lcd_timings(dssdev->manager->id, t);
106 r = dss_set_clock_div(&dss_cinfo);
108 goto err_set_dss_clock_div;
110 r = dispc_set_clock_div(dssdev->manager->id, &dispc_cinfo);
112 goto err_set_dispc_clock_div;
114 dss_sdi_init(dssdev->phy.sdi.datapairs);
115 r = dss_sdi_enable();
120 dssdev->manager->enable(dssdev->manager);
125 err_set_dispc_clock_div:
126 err_set_dss_clock_div:
132 regulator_disable(sdi.vdds_sdi_reg);
134 omap_dss_stop_device(dssdev);
138 EXPORT_SYMBOL(omapdss_sdi_display_enable);
140 void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)
142 dssdev->manager->disable(dssdev->manager);
149 regulator_disable(sdi.vdds_sdi_reg);
151 omap_dss_stop_device(dssdev);
153 EXPORT_SYMBOL(omapdss_sdi_display_disable);
155 int sdi_init_display(struct omap_dss_device *dssdev)
157 DSSDBG("SDI init\n");
159 if (sdi.vdds_sdi_reg == NULL) {
160 struct regulator *vdds_sdi;
162 vdds_sdi = dss_get_vdds_sdi();
164 if (IS_ERR(vdds_sdi)) {
165 DSSERR("can't get VDDS_SDI regulator\n");
166 return PTR_ERR(vdds_sdi);
169 sdi.vdds_sdi_reg = vdds_sdi;