diff options
Diffstat (limited to 'resources/libreboot/patch/kgpe-d16/0076-northbridge-amd-amdmct-mct_ddr3-Work-around-strange-.patch')
| -rw-r--r-- | resources/libreboot/patch/kgpe-d16/0076-northbridge-amd-amdmct-mct_ddr3-Work-around-strange-.patch | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/resources/libreboot/patch/kgpe-d16/0076-northbridge-amd-amdmct-mct_ddr3-Work-around-strange-.patch b/resources/libreboot/patch/kgpe-d16/0076-northbridge-amd-amdmct-mct_ddr3-Work-around-strange-.patch new file mode 100644 index 00000000..c269358f --- /dev/null +++ b/resources/libreboot/patch/kgpe-d16/0076-northbridge-amd-amdmct-mct_ddr3-Work-around-strange-.patch @@ -0,0 +1,40 @@ +From d78d6f37c04273b66bc0de4ea62deea5c033bf97 Mon Sep 17 00:00:00 2001 +From: Timothy Pearson <kb9vqf@pearsoncomputing.net> +Date: Thu, 25 Jun 2015 18:37:45 -0500 +Subject: [PATCH 076/146] northbridge/amd/amdmct/mct_ddr3: Work around strange + phy training issue + +--- + src/northbridge/amd/amdmct/mct_ddr3/mhwlc_d.c | 16 ++++++++++++++++ + 1 file changed, 16 insertions(+) + +diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mhwlc_d.c b/src/northbridge/amd/amdmct/mct_ddr3/mhwlc_d.c +index 72c74e6..9c18d12 100644 +--- a/src/northbridge/amd/amdmct/mct_ddr3/mhwlc_d.c ++++ b/src/northbridge/amd/amdmct/mct_ddr3/mhwlc_d.c +@@ -207,6 +207,22 @@ uint8_t AgesaHwWlPhase2(struct MCTStatStruc *pMCTstat, struct DCTStatStruc *pDCT + + pDCTData->WLCriticalGrossDelayPrevPass = cgd; + ++ if (pDCTstat->Speed != pDCTstat->TargetFreq) { ++ /* FIXME ++ * Using the Pass 1 training values causes major phy training problems on ++ * all Family 15h processors I tested (Pass 1 values are randomly too high, ++ * and Pass 2 cannot lock). ++ * Figure out why this is and fix it, then remove the bypass code below... ++ */ ++ if (pass == FirstPass) { ++ for (ByteLane = 0; ByteLane < MAX_BYTE_LANES; ByteLane++) { ++ pDCTData->WLGrossDelay[index+ByteLane] = pDCTData->WLSeedGrossDelay[index+ByteLane]; ++ pDCTData->WLFineDelay[index+ByteLane] = pDCTData->WLSeedFineDelay[index+ByteLane]; ++ } ++ return 0; ++ } ++ } ++ + /* Compensate for occasional noise/instability causing sporadic training failure */ + for (ByteLane = 0; ByteLane < MAX_BYTE_LANES; ByteLane++) { + uint8_t faulty_value_detected = 0; +-- +1.7.9.5 + |