diff options
| author | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2015-09-13 15:54:32 -0500 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2015-12-01 16:59:01 +0100 |
| commit | 273384638b4f4fbe8e500025d8941bd2e54b5f8a (patch) | |
| tree | fe4da96726bc7178bc9794eb406843652d942861 /src/cpu/amd | |
| parent | f8549e88e243721ac1b26373a774612b66ac8ef2 (diff) | |
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@raptorengineeringinc.com>
Reviewed-on: https://review.coreboot.org/12072
Tested-by: build bot (Jenkins)
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Diffstat (limited to 'src/cpu/amd')
| -rw-r--r-- | src/cpu/amd/family_10h-family_15h/defaults.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/cpu/amd/family_10h-family_15h/defaults.h b/src/cpu/amd/family_10h-family_15h/defaults.h index 28df747971..57c05187f0 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 */ }; |