diff options
Diffstat (limited to 'src/soc/nvidia/tegra124/early_display.c')
-rw-r--r-- | src/soc/nvidia/tegra124/early_display.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/soc/nvidia/tegra124/early_display.c b/src/soc/nvidia/tegra124/early_display.c new file mode 100644 index 0000000000..4356a62b75 --- /dev/null +++ b/src/soc/nvidia/tegra124/early_display.c @@ -0,0 +1,61 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * 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, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <stdlib.h> +#include <stddef.h> +#include <arch/cache.h> +#include "chip.h" +#include <soc/display.h> +#include "gpio.h" + +/* the primary purpose of this function is to kick off things in + * romstage that are time consuming. No more should be done at this + * point than the bare minimum that will allow us to pick up the work + * in the ramstage and not require lots of udelays. ramstage will do + * the rest. As it happens, that merely means 'turn off everything you can, + * save the minimum long-delay bit that you need to get graphics going'. It's + * important not to have the backlight on as people don't like display trash + * on startup, even if I do. + */ +void setup_display(struct soc_nvidia_tegra124_config *config) +{ + if (config->panel_vdd_gpio){ + gpio_output(config->panel_vdd_gpio, 1); + printk(BIOS_SPEW,"%s: setting gpio %08x to %d\n", + __func__, config->panel_vdd_gpio, 1); + } + if (config->lvds_shutdown_gpio){ + gpio_output(config->lvds_shutdown_gpio, 0); + printk(BIOS_SPEW,"%s: setting gpio %08x to %d\n", + __func__, config->lvds_shutdown_gpio, 0); + } + if (config->backlight_en_gpio){ + gpio_output(config->backlight_en_gpio, 0); + printk(BIOS_SPEW,"%s: setting gpio %08x to %d\n", + __func__, config->backlight_en_gpio, 0); + } + if (config->backlight_vdd_gpio){ + gpio_output(config->backlight_vdd_gpio, 0); + printk(BIOS_SPEW,"%s: setting gpio %08x to %d\n", + __func__, config->backlight_vdd_gpio, 0); + } + +} + |