[coreboot-gerrit] [M] Change in coreboot[main]: soc/intel/mtl: Display Sign-of-Life message using FSP-M

[Jérémy Compostella (Code Review)]

Attention is currently required from: Anil Kumar K, Dinesh Gehlot, Eran Mitrani, Jérémy Compostella, Kapil Porwal, Martin L Roth, Martin Roth, Pratikkumar V Prajapati, Shelley Chen, Subrata Banik, Tarun.

Hello Dinesh Gehlot, Eran Mitrani, Kapil Porwal, Martin L Roth, Martin Roth, Pratikkumar V Prajapati, Shelley Chen, Subrata Banik, Tarun, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/78244?usp=email

to look at the new patch set (#24).

The following approvals got outdated and were removed:
Code-Review+1 by Pratikkumar V Prajapati, Verified+1 by build bot (Jenkins)

Change subject: soc/intel/mtl: Display Sign-of-Life message using FSP-M
......................................................................

soc/intel/mtl: Display Sign-of-Life message using FSP-M

Meteor Lake Firmware Support Package (FSP-M) for ChromeOS includes an
pre-memory graphics driver which can be leverage to display a text
message thanks to the following FSP-M UPD (Updateable Product Data):

- VgaInitControl (bitfield):

Bit 0: Turn on graphics, setup VGA text mode and display
         `VgaMessage' text centered on the screen.

Bit 1: Clear text and tear down VGA text mode and graphics before
         returning from FSP-M.

- VbtPtr (address): Pointer to the VBT (Video BIOS Tables) binary.

- VbtSize (unsigned int): Size of the VBT binary.

- LidStatus (boolean): Due to limited resources at early boot stages,
  the text message is displayed on a single monitor. The lid status
  helps decide which display is the most appropriate.

0: Lid is closed: show the text message on the external display if
     avaiable, do not display anything otherwise.

1: Lid is open: show the message on the internal display if
     available, use an external display if available otherwise.

- VgaMessage (string): Text message to display.

If the `SOC_INTEL_METEORLAKE_SIGN_OF_LIFE' flag is set, coreboot
configures the UPDs above to display a text message during memory
training and CSME update. The text message can be configured via the
locale text mechanism using the `memory_training_desc' name.

The `SOC_INTEL_METEORLAKE_SIGN_OF_LIFE' selects the LZ4 compression
algorithm for VBT because LZMA decompression is not available in
romstage by default and adding LZMA support increases the romstage
binary size more than the VBT binary is reduced.

BUG=b:279173035
TEST=Text message is displayed during memory training on a rex board

Change-Id: I8e7772582b1895fa8e38780932346683be998558
Signed-off-by: Jeremy Compostella 
---
M src/soc/intel/meteorlake/Kconfig
M src/soc/intel/meteorlake/romstage/fsp_params.c
2 files changed, 64 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/44/78244/24