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nb/amd/mct_ddr3: Restore previous DQS delay values on failed loop 

Change-Id: Iacfcd7f379d09a633973b4c3ef3cbb97e6d1f09f
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: https://review.coreboot.org/13931
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Timothy Pearson 2016-03-07 09:10:31 -06:00 committed by Martin Roth
parent 7109304cf2
commit bbfcf62512
1 changed files with 6 additions and 0 deletions
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6
src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c
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@ -1522,6 +1522,9 @@ static uint8_t TrainDQSRdWrPos_D_Fam15(struct MCTStatStruc *pMCTstat,
print_debug_dqs("\t\t\t\tTrainDQSRdWrPos: 143 largest read passing region start ", best_pos, 4);
print_debug_dqs("\t\t\t\tTrainDQSRdWrPos: 144 largest read passing region center (raw hardware value) ", region_center, 4);
} else {
/* Restore current settings of other (previously trained) lanes to the active array */
memcpy(current_read_dqs_delay, initial_read_dqs_delay, sizeof(current_read_dqs_delay));
/* Reprogram the Read DQS Timing Control register with the original settings */
write_dqs_read_data_timing_registers(initial_read_dqs_delay, dev, dct, dimm, index_reg);
}
@ -1571,6 +1574,9 @@ static uint8_t TrainDQSRdWrPos_D_Fam15(struct MCTStatStruc *pMCTstat,
print_debug_dqs("\t\t\t\tTrainDQSRdWrPos: 145 largest write passing region ", best_count, 4);
print_debug_dqs("\t\t\t\tTrainDQSRdWrPos: 146 largest write passing region start ", best_pos, 4);
} else {
/* Restore current settings of other (previously trained) lanes to the active array */
memcpy(current_write_dqs_delay, initial_write_data_timing, sizeof(current_write_data_delay));
/* Reprogram the Write DQS Timing Control register with the original settings */
write_dqs_write_data_timing_registers(current_write_dqs_delay, dev, dct, dimm, index_reg);
}