sandbox_vpl: Enable Universal Payload

Use the sandbox_vpl build to test UPL since it supports a real devicetree
in SPL. The sandbox_spl build uses OF_PLATDATA.

Enable writing the UPL handoff in SPL and reading it in U-Boot proper.
Provide a test to check that this handoff works.

Note that the test uses the standard devicetree rather than the test one,
since it is a lot smaller and fits in the existing bloblist.

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

1 files changed, 25 insertions, 0 deletions

diff --git a/test/py/tests/test_upl.py b/test/py/tests/test_upl.py
new file mode 100644
index 00000000000..171079f8dba
--- /dev/null
+++ b/test/py/tests/test_upl.py
@@ -0,0 +1,25 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright 2024 Google LLC
+#
+# Test addition of Universal Payload
+
+import os
+
+import pytest
+import u_boot_utils
+
+@pytest.mark.boardspec('sandbox_vpl')
+def test_upl_handoff(u_boot_console):
+    cons = u_boot_console
+    ram = os.path.join(cons.config.build_dir, 'ram.bin')
+    fdt = os.path.join(cons.config.build_dir, 'u-boot.dtb')
+
+    # Remove any existing RAM file, so we don't have old data present
+    if os.path.exists(ram):
+        os.remove(ram)
+    flags = ['-m', ram, '-d', fdt]
+    cons.restart_uboot_with_flags(flags, use_dtb=False)
+
+    # Make sure that Universal Payload is detected in U-Boot proper
+    output = cons.run_command('upl info')
+    assert output == 'UPL state: active'