nb/intel/sandybridge: Compute data timings independently

Use absolute values for the Rx and Tx bus timings instead of values
relative to the CA (Command/Address) bus timing. This makes the
calculations more accurate, less complex and less error-prone.

Tested on Asus P8H61-M PRO, still boots. Training results do not seem to
be affected by this patch, and the margins roughly have the same shape.

Change-Id: I28ff1bdaadf1fcbca6a5e5ccdd456de683206410
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47771
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions