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);
+	}
+
+}
+