Timothy Pearson (tpearson@raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/13148
-gerrit
commit b6793ee3fac1dc1367e0c207877218473b6a78c5 Author: Timothy Pearson tpearson@raptorengineeringinc.com Date: Tue Nov 24 14:11:52 2015 -0600
nb/amd/mct_ddr3: Fix RDIMM training failure on Fam15h
Certain registered DIMMs failed training due to an error likely introduced during historical rebase. Ensure that the SubMemclkRegDly bit is set according to BKDG recommendations on Family 15 processors.
Change-Id: I24c95265dada9eabf4df280b6f2b4a1eb9cecaf1 Signed-off-by: Timothy Pearson tpearson@raptorengineeringinc.com --- src/northbridge/amd/amdmct/mct_ddr3/mctproc.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mctproc.c b/src/northbridge/amd/amdmct/mct_ddr3/mctproc.c index cf13b40..fc62afb 100644 --- a/src/northbridge/amd/amdmct/mct_ddr3/mctproc.c +++ b/src/northbridge/amd/amdmct/mct_ddr3/mctproc.c @@ -66,6 +66,9 @@ u32 mct_SetDramConfigMisc2(struct DCTStatStruc *pDCTstat, misc2 |= ((cs_mux_67 & 0x1) << 27); misc2 &= ~(0x1 << 26); /* CsMux45 = cs_mux_45 */ misc2 |= ((cs_mux_45 & 0x1) << 26); + + if (pDCTstat->Status & (1 << SB_Registered)) + misc2 |= 1 << SubMemclkRegDly; } else if (pDCTstat->LogicalCPUID & (AMD_DR_Dx | AMD_DR_Cx)) { if (pDCTstat->Status & (1 << SB_Registered)) { misc2 |= 1 << SubMemclkRegDly;