[coreboot-gerrit] Change in coreboot[master]: nb/intel/sandybridge: support more XMP timings

[Dan Elkouby (Code Review)]

Hello build bot (Jenkins), 

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

    https://review.coreboot.org/25664

to look at the new patch set (#2).

Change subject: nb/intel/sandybridge: support more XMP timings
......................................................................

nb/intel/sandybridge: support more XMP timings

Tested with a pair of GSkill F3-1866C9-8GSR.

This makes sure in particular that we honor the CMD rate requested by
the XMP profile. This memory kit needs a CMD rate of 2 to be stable at
DDR3-1600 and up, even though it passes training at 1.

Also respect requested CWL to match vendor firmware and for a potential
increase in performance. The tested kit requests a tighter value than
the per-frequency table provides and has shown to be stable using that
setting.

Change-Id: I634bed764d76345c27f02a2fae5abb2d81b38fd9
Signed-off-by: Dan Elkouby <streetwalkermc at gmail.com>
---
M src/northbridge/intel/sandybridge/raminit_common.c
M src/northbridge/intel/sandybridge/raminit_common.h
M src/northbridge/intel/sandybridge/raminit_ivy.c
M src/northbridge/intel/sandybridge/raminit_sandy.c
4 files changed, 15 insertions(+), 2 deletions(-)


  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/64/25664/2
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I634bed764d76345c27f02a2fae5abb2d81b38fd9
Gerrit-Change-Number: 25664
Gerrit-PatchSet: 2
Gerrit-Owner: Dan Elkouby <streetwalkermc at gmail.com>
Gerrit-Reviewer: Dan Elkouby <streetwalkermc at gmail.com>
Gerrit-Reviewer: build bot (Jenkins) <no-reply at coreboot.org>
Gerrit-CC: Patrick Rudolph <siro at das-labor.org>
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