TDA4VEN-Q1: Signature problem of secure boot

Hi Cesar,

cesar.xu said:

1.  the default keywriter TI dummy key：${PSDKRA_PATH}/pdk/packages/ti/build/makerules/k3_dev_mpk.pem

2.  but  uboot signature different key

Both keys are same. You can run cat command on ke_dev_mpk.pem and custMpk.pem

cesar.xu said:

3. The difference between the two:

• tiboot3-j722s-hs-evm.bin -> tiboot3.bin binary for HS-SE device.
• tiboot3-j722s-hs-fs-evm.bin -> tiboot3.bin binary for HS-FS device 

cesar.xu said:

4. I generated a new key by myself (smpk.pem), how do I replace the key in the Uboot.

Have you flashed the corresponding public key onto the device ? If yes, you can just replace it with the custMpk.pem

Regards
Diwakar