[coreboot-gerrit] Patch set updated for coreboot: cpu/amd/fam10h-15h: Enable DFE on Family 15h HT3 links
Timothy Pearson (tpearson@raptorengineeringinc.com)
gerrit at coreboot.org
Tue Dec 1 16:13:12 CET 2015
Timothy Pearson (tpearson at raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/12072
-gerrit
commit 134ec4201a53e9dfeef21c95643a9bc855456863
Author: Timothy Pearson <tpearson at raptorengineeringinc.com>
Date: Sun Sep 13 15:54:32 2015 -0500
cpu/amd/fam10h-15h: Enable DFE on Family 15h HT3 links
Decision Feedback Equalization (DFE) is a form of dynamic
link training used to lower the overall error rate within
the coherent fabric. Enable it on all capable HT links.
Change-Id: I5e719984ddd723f9e375ff1a9d4fa1ef042cf3eb
Signed-off-by: Timothy Pearson <tpearson at raptorengineeringinc.com>
---
src/cpu/amd/family_10h-family_15h/defaults.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/src/cpu/amd/family_10h-family_15h/defaults.h b/src/cpu/amd/family_10h-family_15h/defaults.h
index 28df747..57c0518 100644
--- a/src/cpu/amd/family_10h-family_15h/defaults.h
+++ b/src/cpu/amd/family_10h-family_15h/defaults.h
@@ -840,4 +840,12 @@ static const struct {
{ 0xC0, AMD_FAM15_ALL, AMD_PTYPE_ALL, HTPHY_LINKTYPE_ALL,
0x40040000, 0xe01F0000 }, /* [31:29] RttCtl = 02h,
[20:16] RttIndex = 04h */
+
+ { 0xc4, AMD_FAM15_ALL, AMD_PTYPE_ALL, HTPHY_LINKTYPE_HT3,
+ 0x00013480, 0x0003fc80 }, /* [17:10] DCV = 0x4d,
+ [7] DfeEn = 0x1 */
+
+ { 0xd4, AMD_FAM15_ALL, AMD_PTYPE_ALL, HTPHY_LINKTYPE_HT3,
+ 0x00013480, 0x0003fc80 }, /* [17:10] DCV = 0x4d,
+ [7] DfeEn = 0x1 */
};
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