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/clk.h>
24 #include <linux/delay.h>
25 #include <linux/err.h>
26 #include <linux/regulator/consumer.h>
28 #include <plat/display.h>
35 struct regulator *vdds_sdi_reg;
38 static void sdi_basic_init(void)
40 dispc_set_parallel_interface_mode(OMAP_DSS_PARALLELMODE_BYPASS);
42 dispc_set_lcd_display_type(OMAP_DSS_LCD_DISPLAY_TFT);
43 dispc_set_tft_data_lines(24);
44 dispc_lcd_enable_signal_polarity(1);
47 int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
49 struct omap_video_timings *t = &dssdev->panel.timings;
50 struct dss_clock_info dss_cinfo;
51 struct dispc_clock_info dispc_cinfo;
57 r = omap_dss_start_device(dssdev);
59 DSSERR("failed to start device\n");
63 r = regulator_enable(sdi.vdds_sdi_reg);
67 /* In case of skip_init sdi_init has already enabled the clocks */
69 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
74 dssdev->panel.config |= OMAP_DSS_LCD_RF | OMAP_DSS_LCD_ONOFF;
76 dispc_set_pol_freq(dssdev->panel.config, dssdev->panel.acbi,
80 r = dss_calc_clock_div(1, t->pixel_clock * 1000,
81 &dss_cinfo, &dispc_cinfo);
83 r = dss_get_clock_div(&dss_cinfo);
84 r = dispc_get_clock_div(&dispc_cinfo);
91 lck_div = dispc_cinfo.lck_div;
92 pck_div = dispc_cinfo.pck_div;
94 pck = fck / lck_div / pck_div / 1000;
96 if (pck != t->pixel_clock) {
97 DSSWARN("Could not find exact pixel clock. Requested %d kHz, "
101 t->pixel_clock = pck;
105 dispc_set_lcd_timings(t);
107 r = dss_set_clock_div(&dss_cinfo);
111 r = dispc_set_clock_div(&dispc_cinfo);
115 if (!sdi.skip_init) {
116 dss_sdi_init(dssdev->phy.sdi.datapairs);
117 r = dss_sdi_enable();
123 dssdev->manager->enable(dssdev->manager);
129 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
130 regulator_disable(sdi.vdds_sdi_reg);
132 omap_dss_stop_device(dssdev);
136 EXPORT_SYMBOL(omapdss_sdi_display_enable);
138 void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)
140 dssdev->manager->disable(dssdev->manager);
144 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
146 regulator_disable(sdi.vdds_sdi_reg);
148 omap_dss_stop_device(dssdev);
150 EXPORT_SYMBOL(omapdss_sdi_display_disable);
152 int sdi_init_display(struct omap_dss_device *dssdev)
154 DSSDBG("SDI init\n");
159 int sdi_init(bool skip_init)
161 /* we store this for first display enable, then clear it */
162 sdi.skip_init = skip_init;
164 sdi.vdds_sdi_reg = dss_get_vdds_sdi();
165 if (IS_ERR(sdi.vdds_sdi_reg)) {
166 DSSERR("can't get VDDS_SDI regulator\n");
167 return PTR_ERR(sdi.vdds_sdi_reg);
170 * Enable clocks already here, otherwise there would be a toggle
171 * of them until sdi_display_enable is called.
174 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);