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;