vbe: Add a test for the VBE flow into U-Boot proper

Add a test which checks that VBE boots correctly from TPL through to
U-Boot proper.

Signed-off-by: Simon Glass <sjg@chromium.org>

test/py/tests/test_vbe_vpl.py

@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright 2022 Google LLC
+#
+# Test addition of VBE
+
+import os
+
+import pytest
+import u_boot_utils
+
+@pytest.mark.boardspec('sandbox_vpl')
+@pytest.mark.requiredtool('dtc')
+def test_vbe_vpl(u_boot_console):
+    cons = u_boot_console
+    #cmd = [cons.config.build_dir + fname, '-v']
+    ram = os.path.join(cons.config.build_dir, 'ram.bin')
+    fdt = os.path.join(cons.config.build_dir, 'arch/sandbox/dts/test.dtb')
+
+    # Enable firmware1 and the mmc that it uses. These are needed for the full
+    # VBE flow.
+    u_boot_utils.run_and_log(
+        cons, f'fdtput -t s {fdt} /bootstd/firmware0 status disabled')
+    u_boot_utils.run_and_log(
+        cons, f'fdtput -t s {fdt} /bootstd/firmware1 status okay')
+    u_boot_utils.run_and_log(
+        cons, f'fdtput -t s {fdt} /mmc3 status okay')
+
+    # Remove any existing RAM file, so we don't have old data present
+    if os.path.exists(ram):
+        os.remove(ram)
+    flags = ['-p', os.path.join(cons.config.build_dir, 'image.bin'), '-w',
+             '-s', 'state.dtb']
+    cons.restart_uboot_with_flags(flags)
+
+    # Make sure that VBE was used in both VPL (to load SPL) and SPL (to load
+    # U-Boot
+    output = cons.run_command('vbe state')
+    assert output == 'Phases: VPL SPL'