diff options
| author | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2016-04-29 01:34:08 -0500 |
|---|---|---|
| committer | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2016-05-01 00:49:40 +0200 |
| commit | 263c679075816a0db146ff5fa6b94689837ff696 (patch) | |
| tree | 3ac008f38f414e8b6fd79c9bedc75f12318536de /src/northbridge | |
| parent | 7f731f8d4f0d4dbc109869032f4e993995eac045 (diff) | |
nb/amd/mct_ddr3: Skip nibble training when current DIMM is not x4
Change-Id: I1f5b024606093dc81de3f3d69b7a43e20141b709
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: https://review.coreboot.org/14542
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c | 4 | ||||
| -rw-r--r-- | src/northbridge/amd/amdmct/mct_ddr3/mhwlc_d.c | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c b/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c index f0ee6afedd..77ae4838cc 100644 --- a/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c +++ b/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c @@ -1439,6 +1439,10 @@ static void dqsTrainRcvrEn_SW_Fam15(struct MCTStatStruc *pMCTstat, /* Back up the Nibble 0 delays for later use */ memcpy(nibble0_current_total_delay, current_total_delay, sizeof(current_total_delay)); } + + /* Exit nibble training if current DIMM is not x4 */ + if ((pDCTstat->Dimmx4Present & (1 << (dimm + Channel))) == 0) + break; } if (_2Ranks) { diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mhwlc_d.c b/src/northbridge/amd/amdmct/mct_ddr3/mhwlc_d.c index c6ec9052fc..ffc6fb2df0 100644 --- a/src/northbridge/amd/amdmct/mct_ddr3/mhwlc_d.c +++ b/src/northbridge/amd/amdmct/mct_ddr3/mhwlc_d.c @@ -184,6 +184,10 @@ uint8_t AgesaHwWlPhase1(struct MCTStatStruc *pMCTstat, struct DCTStatStruc *pDCT } pDCTData->WLCriticalGrossDelayPrevPass = 0x0; + + /* Exit nibble training if current DIMM is not x4 */ + if ((pDCTstat->Dimmx4Present & (1 << (dimm + dct))) == 0) + break; } return 0; |