soc/mediatek/mt8192: Use LZ4 compression for MCUs
For MT8192 MCUs, replace LZMA compression with LZ4 to speed up boot
process. The loading (plus decompression) time of mcupm.bin and sspm.bin
is consistently reduced by 8ms, respectively.
BUG=b:177389446
TEST=emerge-asurada coreboot
TEST=Hayato booted up
BRANCH=none
Change-Id: Ida35e7f6e0572ad43082e53bcc69bc708cf7da44
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50278
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
diff --git a/src/soc/mediatek/mt8192/Makefile.inc b/src/soc/mediatek/mt8192/Makefile.inc
index 9d22ef2..9109e61 100644
--- a/src/soc/mediatek/mt8192/Makefile.inc
+++ b/src/soc/mediatek/mt8192/Makefile.inc
@@ -78,7 +78,7 @@
$(foreach fw, $(call strip_quotes,$(mcu-firmware-files)), \
$(eval $(fw)-file := $(MT8192_BLOB_DIR)/$(fw)) \
$(eval $(fw)-type := raw) \
- $(eval $(fw)-compression := $(CBFS_COMPRESS_FLAG)) \
+ $(eval $(fw)-compression := LZ4) \
$(if $(wildcard $($(fw)-file)), $(eval cbfs-files-y += $(fw)), ) \
)