diff options
Diffstat (limited to 'src/northbridge/amd/amdmct')
| -rw-r--r-- | src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c b/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c index 1a3c7c1aa6..8d7ff27105 100644 --- a/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c +++ b/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c @@ -1717,6 +1717,7 @@ static void TrainDQSReceiverEnCyc_D_Fam15(struct MCTStatStruc *pMCTstat, /* 2.10.5.8.3 */ Receiver = mct_InitReceiver_D(pDCTstat, dct); + /* Indicate success unless training the DCT explicitly fails */ dct_training_success = 1; /* There are four receiver pairs, loosely associated with chipselects. @@ -1729,8 +1730,9 @@ static void TrainDQSReceiverEnCyc_D_Fam15(struct MCTStatStruc *pMCTstat, continue; } - for (lane = 0; lane < MAX_BYTE_LANES; lane++) - lane_training_success[lane] = 0; + /* Initialize variables */ + memset(lane_training_success, 0, sizeof(lane_training_success)); + memset(current_phy_phase_delay, 0, sizeof(current_phy_phase_delay)); /* 2.10.5.8.3 (2) */ read_dqs_receiver_enable_control_registers(initial_phy_phase_delay, dev, dct, dimm, index_reg); @@ -1792,14 +1794,17 @@ static void TrainDQSReceiverEnCyc_D_Fam15(struct MCTStatStruc *pMCTstat, #endif /* 2.10.5.8.3 (5) */ - prev = 0; - for (current_phy_phase_delay[lane] = rx_en_offset; current_phy_phase_delay[lane] < 0x3ff; current_phy_phase_delay[lane] += ren_step) { + prev = dqs_results_array[rx_en_offset]; + for (current_phy_phase_delay[lane] = rx_en_offset + ren_step; current_phy_phase_delay[lane] < 0x3ff; current_phy_phase_delay[lane] += ren_step) { if ((dqs_results_array[current_phy_phase_delay[lane]] == 0) && (prev == 1)) { /* Restore last known good delay */ current_phy_phase_delay[lane] -= ren_step; /* 2.10.5.8.3 (5 A B) */ - current_phy_phase_delay[lane] -= 0x10; + if (current_phy_phase_delay[lane] < 0x10) + current_phy_phase_delay[lane] = 0x0; + else + current_phy_phase_delay[lane] -= 0x10; /* Update hardware registers with final values */ write_dqs_receiver_enable_control_registers(current_phy_phase_delay, dev, dct, dimm, index_reg); |