The log without tf card, it seems that the board reboot again.
DDR Version 1.26 20210628
In
Channel 0: DDR3, 800MHz
Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
Channel 1: DDR3, 800MHz
Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
256B stride
ch 0 ddrconfig = 0x101, ddrsize = 0x20
ch 1 ddrconfig = 0x101, ddrsize = 0x20
pmugrf_os_reg[2] = 0x32817281, stride = 0x9
OUT
Boot1 Release Time: May 29 2020 17:36:36, version: 1.26
CPUId = 0x0
ChipType = 0x10, 338
mmc: ERROR: SDHCI:Transfer data timeout
mmc: ERROR: SDHCI ERR:cmd:0x153a,stat:0x0
mmc: ERROR: Tuning procedure failed, falling back to fixed sampling clock
mmc: ERROR: tuning execution failed
emmc reinit
mmc: ERROR: SDHCI:Transfer data timeout
mmc: ERROR: SDHCI ERR:cmd:0x153a,stat:0x0
mmc: ERROR: Tuning procedure failed, falling back to fixed sampling clock
mmc: ERROR: tuning execution failed
emmc reinit
mmc: ERROR: SDHCI:Transfer data timeout
mmc: ERROR: SDHCI ERR:cmd:0x153a,stat:0x0
mmc: ERROR: Tuning procedure failed, falling back to fixed sampling clock
mmc: ERROR: tuning execution failed
SdmmcInit=2 1
mmc0:cmd8,20
mmc0:cmd5,20
mmc0:cmd55,20
mmc0:cmd1,20
mmc0:cmd8,20
mmc0:cmd5,20
mmc0:cmd55,20
mmc0:cmd1,20
mmc0:cmd8,20
mmc0:cmd5,20
mmc0:cmd55,20
mmc0:cmd1,20
SdmmcInit=0 1
UsbBoot ...35647542
powerOn 35659765
Usb re Boot. 2
Usb re Boot. 6000006
Usb re Boot. 12000011
SoftReset
DDR Version 1.26 20210628
In
soft reset
SRX
Channel 0: DDR3, 800MHz
Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
Channel 1: DDR3, 800MHz
Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
256B stride
ch 0 ddrconfig = 0x101, ddrsize = 0x20
ch 1 ddrconfig = 0x101, ddrsize = 0x20
pmugrf_os_reg[2] = 0x32817281, stride = 0x9
OUT