/* * linux/drivers/video/omap2/dss/sdi.c * * Copyright (C) 2009 Nokia Corporation * Author: Tomi Valkeinen * * 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 . */ #define DSS_SUBSYS_NAME "SDI" #include #include #include #include #include #include #include #include "dss.h" static struct { bool skip_init; bool update_enabled; struct regulator *vdds_sdi_reg; } sdi; static void sdi_basic_init(void) { dispc_set_parallel_interface_mode(OMAP_DSS_PARALLELMODE_BYPASS); dispc_set_lcd_display_type(OMAP_DSS_LCD_DISPLAY_TFT); dispc_set_tft_data_lines(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(); /* 15.5.9.1.2 */ dssdev->panel.config |= OMAP_DSS_LCD_RF | OMAP_DSS_LCD_ONOFF; dispc_set_pol_freq(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(&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(t); r = dss_set_clock_div(&dss_cinfo); if (r) goto err2; r = dispc_set_clock_div(&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) { }