Yu-Ping Wu has uploaded a new patch set (#47) to the change originally created by huayang duan. ( https://review.coreboot.org/c/coreboot/+/35110 )
Change subject: mb/google/kukui: Load calibration params and run DRAM calibration flow ......................................................................
mb/google/kukui: Load calibration params and run DRAM calibration flow
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 --- M src/mainboard/google/kukui/Makefile.inc M src/mainboard/google/kukui/romstage.c M src/soc/mediatek/mt8183/include/soc/dramc_param.h M src/soc/mediatek/mt8183/include/soc/emi.h M src/soc/mediatek/mt8183/memory.c 5 files changed, 169 insertions(+), 6 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/10/35110/47