I2C , Start the problem

Hi:
At start, I2C have a problem, Log as follows.
Log:
[BEGIN] 2020/5/26 9:53:37
opt-desktop login: ッ[0000.150] C> I2C command failed
[0000.153] C> block index = (4) and rail_id = (1)
[0000.158] C> Addr: Reg = [0xe8:0x07]: 336166925
[0000.162] C> I2C command failed
[0000.165] C> block index = (5) and rail_id = (1)
[0000.170] C> Addr: Reg = [0xe8:0x07]: 336166925
[0000.353] I> Welcome to MB2(TBoot-BPMP)(version: 01.00.160913-t186-M-00.00-mobile-1b47d5d9)
[0000.361] I> bit @ 0xd480000
[0000.364] I> Boot-device: eMMC
[0000.368] I> sdmmc bdev is already initialized
[0000.373] I> pmic: reset reason (nverc) : 0x40
I want know, “I2C command faild” , What are the factors contributing to this problem.

Looks like the bootloader to access the pmic i2c got failed.