From c7712ee2908097492baecf5fda5e4651744ca746 Mon Sep 17 00:00:00 2001
From: Kelvin Zhang <zhangkelvin@google.com>
Date: Wed, 26 Jun 2024 10:16:51 -0700
Subject: [PATCH] Support custom DTBO image for 16KB target

Test: set BOARD_PREBUILT_DTBOIMAGE_16KB, and build
Bug: 349590107
Change-Id: If27d5e349ad28f1f803625da7331c3277fe3ca5f
---
 core/Makefile | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/core/Makefile b/core/Makefile
index 82b2460e54..06ef72f560 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1165,6 +1165,33 @@ ramdisk_16k: $(BUILT_RAMDISK_16K_TARGET)
 
 endif
 
+# -----------------------------------------------------------------
+# 16KB dtbo image
+ifdef BOARD_PREBUILT_DTBOIMAGE_16KB
+INSTALLED_DTBOIMAGE_16KB_TARGET := $(PRODUCT_OUT)/dtbo_16k.img
+
+ifeq ($(BOARD_AVB_ENABLE),true)
+$(INSTALLED_DTBOIMAGE_16KB_TARGET): $(BOARD_PREBUILT_DTBOIMAGE_16KB) $(AVBTOOL) $(BOARD_AVB_DTBO_KEY_PATH)
+	cp $(BOARD_PREBUILT_DTBOIMAGE_16KB) $@
+	chmod +w $@
+	$(AVBTOOL) add_hash_footer \
+	    --image $@ \
+	    $(call get-partition-size-argument,$(BOARD_DTBOIMG_PARTITION_SIZE)) \
+	    --partition_name dtbo $(INTERNAL_AVB_DTBO_SIGNING_ARGS) \
+	    $(BOARD_AVB_DTBO_ADD_HASH_FOOTER_ARGS)
+
+$(call declare-1p-container,$(INSTALLED_DTBOIMAGE_16KB_TARGET),)
+$(call declare-container-license-deps,$(INSTALLED_DTBOIMAGE_16KB_TARGET),$(BOARD_PREBUILT_DTBOIMAGE_16KB),$(PRODUCT_OUT)/:/)
+
+UNMOUNTED_NOTICE_VENDOR_DEPS += $(INSTALLED_DTBOIMAGE_16KB_TARGET)
+else
+$(INSTALLED_DTBOIMAGE_16KB_TARGET): $(BOARD_PREBUILT_DTBOIMAGE_16KB)
+	cp $(BOARD_PREBUILT_DTBOIMAGE_16KB) $@
+endif
+
+endif # BOARD_PREBUILT_DTBOIMAGE_16KB
+
+
 ifneq ($(BOARD_KERNEL_PATH_16K),)
 BUILT_KERNEL_16K_TARGET := $(PRODUCT_OUT)/kernel_16k