avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/drivers/video/display-uclass.c

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <display.h>
+#include <edid.h>
+#include <errno.h>
+
+int display_read_edid(struct udevice *dev, u8 *buf, int buf_size)
+{
+	struct dm_display_ops *ops = display_get_ops(dev);
+
+	if (!ops || !ops->read_edid)
+		return -ENOSYS;
+	return ops->read_edid(dev, buf, buf_size);
+}
+
+int display_enable(struct udevice *dev, int panel_bpp,
+			const struct display_timing *timing)
+{
+	struct dm_display_ops *ops = display_get_ops(dev);
+
+	if (!ops || !ops->enable)
+		return -ENOSYS;
+	return ops->enable(dev, panel_bpp, timing);
+}
+
+int display_read_timing(struct udevice *dev, struct display_timing *timing)
+{
+	struct dm_display_ops *ops = display_get_ops(dev);
+	int panel_bits_per_colour;
+	u8 buf[EDID_EXT_SIZE];
+	int ret;
+
+	if (ops && ops->read_timing)
+		return ops->read_timing(dev, timing);
+
+	if (!ops || !ops->read_edid)
+		return -ENOSYS;
+	ret = ops->read_edid(dev, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	return edid_get_timing(buf, ret, timing, &panel_bits_per_colour);
+}
+
+UCLASS_DRIVER(display) = {
+	.id		= UCLASS_DISPLAY,
+	.name		= "display",
+	.per_device_platdata_auto_alloc_size	= sizeof(struct display_plat),
+};