the following patch was just integrated into master:
Author: Timothy Pearson <tpearson(a)raptorengineeringinc.com>
Date: Fri Apr 29 00:38:29 2016 -0500
nb/amd/mct_ddr3: Fix x4 DIMM receiver enable training on Fam15h
The existing Family 15h receiver enable training code stored
temporary delay values in the wrong variables, leading to
the requisite averaging of delays across nibbles not being
applied. This in turn made x4 DIMMs less stable than they
should have been.
Store temporary nibble delay values in a dedicated array.
Signed-off-by: Timothy Pearson <tpearson(a)raptorengineeringinc.com>
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand
Reviewed-by: Martin Roth <martinroth(a)google.com>