Failure to read older uboot environment variable from uboot BSP 5.10.72_2.2.0

[tamdo]

Dear all,

I'm trying to upgrade uboot (BSP 5.4.70_2.3.0) to uboot (BSP 5.10.72_2.2.0) and got an issue when read environment variables.

In uboot (BSP 5.4.70_2.3.0), CONFIG_ENV_SIZE=0x1000

In uboot (BSP 5.10.72_2.2.0), CONFIG_ENV_SIZE=0x4000

I save uboot environment at an offset of eMMC, but because the sizes are different between 2 version, new uboot can not read successfully older uboot environment and it will use default. This makes a wrong behavior in upgrade flow by SWUpdate (double copying).

I'm trying to reduce size of default enviorment variables in uboot 5.10.72_2.2.0 by removing unnecessary variables and continue use CONFIG_ENV_SIZE=0x1000. 

This way is working but I do not know if there are better solutions. It's great if you can share your experience. Thanks in advance !

[joanxie]

maybe you can refer to the SWupdate

"https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/SWUpdate-OTA-i-MX8MM-EVK-i-MX8QXP-MEK/ta..."

[tamdo]

Thanks @joanxie for reply. I am using SWUpdate and it worked for some firmwares. But the issue occured when I was trying to upgrade to new uboot with bigger ENV size. 

[joanxie]

I remember I mailed to you, did you receive it? how about now?