[coreboot] Problems with CAR setup on Tiger Lake

[Michał Żygowski]

Dear coreboot community,

I have a Tiger Lake UP3 RVP and I try to build a working coreboot on it,
however facing an early stuck during CAR setup. Tried different approaches:

- native coreboot's CAR setup - the last seen post code is 0x26
- FSP-T CAR setup - the last seen post code is 0x7F (which is
TempRamInit Exit event according to FSP integration guide), FSP from
public repo, Client variant

Used microcode from original RVP firmware.

Are there any patches that I have to apply to make it working?

Best regards,