[XS] Change in coreboot[main]: soc/intel/pantherlake: Reduce IGD stolen memory size from 128MB to 60MB

[Subrata Banik (Code Review)]

Attention is currently required from: Avi Uday, Intel coreboot Reviewers, Jayvik Desai, Kapil Porwal, Pranava Y N, Subrata Banik.

Hello Avi Uday, Intel coreboot Reviewers, Jayvik Desai, Kapil Porwal, Pranava Y N, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/87460?usp=email

to look at the new patch set (#4).

Change subject: soc/intel/pantherlake: Reduce IGD stolen memory size from 128MB to 60MB
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soc/intel/pantherlake: Reduce IGD stolen memory size from 128MB to 60MB

This commit updates the pre-allocated IGD stolen memory size for Intel
Panther Lake SoCs from 128MB to 60MB within the FSP-M configuration
parameters.

Reducing the IGD stolen memory allocation from 128MB to 60MB
significantly optimizes system memory resource utilization (by 68MB).

Furthermore, this reduction frees one MTRR. Previously, the 128MB IGD
allocation consumed all 10 available BIOS MTRRs; the new 60MB allocation
now leaves MTRR index 9 available.

BUG=b:413638298
TEST=Able to boot google/fatcat to OS w/ internal and/or external
display attach.

Change-Id: Ifd60973bc5d37cbbc4ea6c8eaf5d851069d53083
Signed-off-by: Subrata Banik 
---
M src/soc/intel/pantherlake/romstage/fsp_params.c
1 file changed, 2 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/60/87460/4