Patch set updated for coreboot: nb/amd/mct_ddr3: Restore previous DQS delay values on failed loop

[Timothy Pearson]

Timothy Pearson ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/13931

-gerrit

commit 871d176a9a61fd194fc531dc30efaca83983e5d0
Author: Timothy Pearson 
Date:   Mon Mar 7 09:10:31 2016 -0600

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

Change-Id: Iacfcd7f379d09a633973b4c3ef3cbb97e6d1f09f
    Signed-off-by: Timothy Pearson 
---
 src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c b/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c
index 19a7acb..1a3c7c1 100644
--- a/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c
+++ b/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c
@@ -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);
    		}