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soc/mediatek/mt8183: Compress calibration blob with LZ4 

The DRAM calibration blob can be compressed using pre-RAM algorithm
(currently LZ4), which will save ~12ms in boot time.

On Kodama, boot time difference:
 Before: 1,082,711
 After:  1,070,309

BUG=b:139099592,b:117953502
TEST=build and boot, cbfstool coreboot.rom print -v (see dram compressed)
BRANCH=kukui

Change-Id: Ic3bd49d67ee6f80a0e4d8f6945744642611edf64
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36054
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Hung-Te Lin 2019-10-15 17:19:44 +08:00 committed by Patrick Georgi
parent 064d6cb8a5
commit 2b32cb215f
1 changed files with 1 additions and 1 deletions
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2
src/soc/mediatek/mt8183/Makefile.inc
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@ -84,7 +84,7 @@ sspm.bin-compression := $(CBFS_COMPRESS_FLAG)
DRAM_CBFS := $(CONFIG_CBFS_PREFIX)/dram
$(DRAM_CBFS)-file := $(MT8183_BLOB_DIR)/dram.elf
$(DRAM_CBFS)-type := stage
$(DRAM_CBFS)-compression := none
$(DRAM_CBFS)-compression := $(CBFS_PRERAM_COMPRESS_FLAG)
ifneq ($(wildcard $($(DRAM_CBFS)-file)),)
cbfs-files-y += $(DRAM_CBFS)
endif