Change in coreboot[master]: mb/ocp/deltalake: Update IIO PCIe bifurcation according to different ...

[Johnny Lin (Code Review)]

Johnny Lin has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/41527 )

Change subject: mb/ocp/deltalake: Update IIO PCIe bifurcation according to different configs
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Patch Set 20:

(1 comment)

https://review.coreboot.org/c/coreboot/+/41527/20/src/mainboard/ocp/deltalak... 
File src/mainboard/ocp/deltalake/romstage.c:

https://review.coreboot.org/c/coreboot/+/41527/20/src/mainboard/ocp/deltalak... 
PS20, Line 18: mupd->FspmConfig.IioConfigIOU2[0] = IIO_BIFURCATE_xxxxxxxx;
             : 	mupd->FspmConfig.IioConfigIOU3[0] = IIO_BIFURCATE_xxxxxx16;
             : 	mupd->FspmConfig.IioConfigIOU4[0] = IIO_BIFURCATE_xxxxxxxx;
> This changed?

The bifurcation for CONFIG C is IOU0 and IOU1: x4x4x4x4, IOU2: CPX doesn't have it.
IOU3: x16 for NIC.
FspmUpd->FspmConfig.IioConfigIOU0[0] => Maps to physical PCI express lanes Port 1A~1D.
FspmUpd->FspmConfig.IioConfigIOU1[0] => Maps to physical PCI express lanes Port 2A~2D.
FspmUpd->FspmConfig.IioConfigIOU2[0] => CPX doesn’t have this port.
FspmUpd->FspmConfig.IioConfigIOU3[0] => Maps to physical PCI express lanes Port 3A~3D.
FspmUpd->FspmConfig.IioConfigIOU4[0] ==> is not used by YV3 so I set it to IIO_BIFURCATE_xxxxxxxx.
We have an excel table for the IIO bifurcation for each config if you need more detail.