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| author | Huayang Duan <huayang.duan@mediatek.com> | 2019-08-27 13:36:14 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-10-09 22:22:41 +0000 |
| commit | 078332e4d82a9a2edfa4e3fbcdc8b0b78356f989 (patch) | |
| tree | f5f576fa261890f34eae1648d9224ef6fe1f3be8 /src/soc/mediatek/mt8183/Makefile.inc | |
| parent | 846be446d3099544c2d1029ca2b7884c1641441d (diff) | |
| download | coreboot-078332e4d82a9a2edfa4e3fbcdc8b0b78356f989.tar.gz coreboot-078332e4d82a9a2edfa4e3fbcdc8b0b78356f989.tar.bz2 coreboot-078332e4d82a9a2edfa4e3fbcdc8b0b78356f989.zip | |
soc/mediatek/mt8183: Run DRAM full calibration
Load the calibration params from flash first and check the correctness
of the params. If the params have correct format, perform DRAM fast
calibration with these params to reduce bootup time. Otherwise, load the
DRAM blob and perform DRAM full calibration.
Bootup time of DRAM partial calibration:
- 1,349,385 usecs with low frequency
- 924,698 usecs with middle frequency
- 1,270,089 usecs with high frequency
3,544,172 usecs in total.
Bootup time of DRAM fast calibration:
- 216,663 usecs with low frequency
- 328,220 usecs with middle frequency
- 322,612 usecs with high frequency
867,495 usecs in total.
BUG=b:139099592
BRANCH=none
TEST=emerge-kukui coreboot
Change-Id: I8de29b14b1fb24b3b4f351c855c5c4d8f350cc34
Signed-off-by: Huayang Duan <huayang.duan@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35110
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Diffstat (limited to 'src/soc/mediatek/mt8183/Makefile.inc')
| -rw-r--r-- | src/soc/mediatek/mt8183/Makefile.inc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8183/Makefile.inc b/src/soc/mediatek/mt8183/Makefile.inc index 72a4d9cf625e..70fd08052ce7 100644 --- a/src/soc/mediatek/mt8183/Makefile.inc +++ b/src/soc/mediatek/mt8183/Makefile.inc @@ -81,6 +81,14 @@ sspm.bin-file := $(MT8183_BLOB_DIR)/sspm.bin sspm.bin-type := raw sspm.bin-compression := $(CBFS_COMPRESS_FLAG) +DRAM_CBFS := $(CONFIG_CBFS_PREFIX)/dram +$(DRAM_CBFS)-file := $(MT8183_BLOB_DIR)/dram.elf +$(DRAM_CBFS)-type := stage +$(DRAM_CBFS)-compression := none +ifneq ($(wildcard $($(DRAM_CBFS)-file)),) + cbfs-files-y += $(DRAM_CBFS) +endif + BL31_MAKEARGS += PLAT=mt8183 CPPFLAGS_common += -Isrc/soc/mediatek/mt8183/include |