[coreboot] MRC saving for apollolake

[Antony AbeePrakash X V]

Hi,

We are developing coreboot for Apollo lake custom board.

We would like to reduce the boot time. For this,

  *   Enabled "MRC training data save" in FSP2_0 using Binary configuration tool.

But we are receiving the following logs:
NVM Write Failed. Update is lost. If repeatedly encountered, clear GPP4 and try again
Saved MRC training data with status (0x80000007)

We would like to get clarification for the following:

  1.  Can we cache and save MRC training data for Apollo lake platform ?
  2.  Will it be done through CSE using HECI interface or through the SPI read/write operation in the NVRAM ?
  3.  Do we need to add Mrc.bin file with coreboot?  If yes, where can we get the same ?

Thanks & Regards,
Antony


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