From 3e990e4794cd32fd5abc026438d984b92ee1aa07 Mon Sep 17 00:00:00 2001
From: Sugar Zhang <sugar.zhang@rock-chips.com>
Date: Wed, 12 Jan 2022 17:01:28 +0800
Subject: [PATCH] rk: kbuild: Use standard lz4 format for Image.lz4 on ARM64

Uboot use the Standard Lz4 format to decompress kernel Image.lz4,
So, we should use the standard one for lz4 compression.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Change-Id: Ic299314a6377e68fac477f451d1ffcae9e8466ce
---
 arch/arm64/boot/Makefile | 2 +-
 scripts/Makefile.lib     | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/Makefile b/arch/arm64/boot/Makefile
index cd3414898d10..7469148c3594 100644
--- a/arch/arm64/boot/Makefile
+++ b/arch/arm64/boot/Makefile
@@ -28,7 +28,7 @@ $(obj)/Image.gz: $(obj)/Image FORCE
 	$(call if_changed,gzip)
 
 $(obj)/Image.lz4: $(obj)/Image FORCE
-	$(call if_changed,lz4)
+	$(call if_changed,lz4c)
 
 $(obj)/Image.lzma: $(obj)/Image FORCE
 	$(call if_changed,lzma)
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 1cbf3aa6fa89..30f380b64bb3 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -425,6 +425,11 @@ quiet_cmd_lz4 = LZ4     $@
                   $(LZ4) -l -12 --favor-decSpeed stdin stdout; \
                   $(size_append); } > $@
 
+quiet_cmd_lz4c = LZ4C    $@
+      cmd_lz4c = { cat $(real-prereqs) | \
+                   $(LZ4) -12 --favor-decSpeed stdin stdout; \
+                   $(size_append); } > $@
+
 # U-Boot mkimage
 # ---------------------------------------------------------------------------