On customer AM62x board, DDR4 is -075E Micron, it should be OK to work at 1600 -125E which CL=13. but can only work with CL=14, hang with CL=13 after tiboot3.
I reproduced it on AM62-SK: With CL=13, stopped after tiboot3:
U-Boot SPL 2021.01-00002-g77bcc61275-dirty (Aug 29 2022 - 15:14:49 +0800)
SYSFW ABI: 3.1 (firmware rev 0x0008 '8.3.2--v08.03.02 (Jolly Jellyfi')
spl_board_init() in evm.c done.
Trying to boot from MMC2
/* no more output */
Below is CL=14 log:
U-Boot SPL 2021.01-00002-g77bcc61275-dirty (Aug 29 2022 - 15:07:29 +0800)
SYSFW ABI: 3.1 (firmware rev 0x0008 '8.3.2--v08.03.02 (Jolly Jellyfi')
spl_board_init() in evm.c done.
Trying to boot from MMC2
Loading Environment from MMC... *** Warning - No MMC card found, using default environment
Starting ATF on ARM64 core...
NOTICE: BL31: v2.6(release):08.03.00.003-dirty
NOTICE: BL31: Built : 16:35:46, May 30 2022
U-Boot SPL 2021.01-00002-g77bcc61275-dirty (Aug 29 2022 - 14:46:41 +0800)
SYSFW ABI: 3.1 (firmware rev 0x0008 '8.3.2--v08.03.02 (Jolly Jellyfi')
spl_board_init() in evm.c done.
Trying to boot from MMC2
U-Boot 2021.01-00002-g77bcc61275-dirty (Aug 29 2022 - 14:46:41 +0800)
SoC: AM62X SR1.0
Model: Texas Instruments AM625 SK
EEPROM not available at 0x50, trying to read at 0x51
Tony Board: AM62-SKEVM rev E2
DRAM: DDR size 0x40000000
1 GiB
MMC: mmc@fa10000: 0, mmc@fa00000: 1, mmc@fa20000: 2
Loading Environment from MMC... OK
In: serial@2800000
Out: serial@2800000
Err: serial@2800000
Net: eth0: ethernet@8000000port@1
Hit any key to stop autoboot: 0
=>
