[coreboot-gerrit] New patch to review for coreboot: google/oak: Increase the driving strength for 4GB DRAMs

[Patrick Georgi (pgeorgi@google.com)]

Patrick Georgi (pgeorgi at google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/16917

-gerrit

commit 9a5348d6bacc4b74837f3fb9454a03829587abe9
Author: PH Hsu <ph.hsu at mediatek.com>
Date:   Thu Oct 6 12:31:52 2016 +0800

    google/oak: Increase the driving strength for 4GB DRAMs
    
    Some PVT units encountered DRAM calibration failure during
    power on/off tests. The failure is caused by higher impedance
    of the DRAM on those units. So increase the driving strength
    for 4GB DRAMs.
    
    BUG=chrome-os-partner:57392
    TEST=run cold reboot 100 times on PVT units which have DRAM
    calibration issue.
    
    Change-Id: I8a329093db3f1def566e4b7afec3c4f4bfe44c6a
    Signed-off-by: Patrick Georgi <pgeorgi at chromium.org>
    Original-Commit-Id: cf1aa5ade856af433fa056f51a20d18553ae241d
    Original-Change-Id: I0d1776cd1a5892d1f82e9bf414620d1ef6d29132
    Original-Signed-off-by: PH Hsu <ph.hsu at mediatek.com>
    Original-Reviewed-on: https://chromium-review.googlesource.com/394451
    Original-Commit-Ready: Yidi Lin <yidi.lin at mediatek.com>
    Original-Tested-by: Yidi Lin <yidi.lin at mediatek.com>
    Original-Reviewed-by: Pin-Huan Hsu <ph.hsu at mediatek.com>
    Original-Reviewed-by: Julius Werner <jwerner at chromium.org>
    Original-Reviewed-by: Daniel Kurtz <djkurtz at chromium.org>
---
 src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc | 4 ++--
 src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc | 4 ++--
 src/mainboard/google/oak/sdram_inf/sdram-lpddr3-hynix-4GB.inc      | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc
index 0fe16a6..f03f858 100644
--- a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc
+++ b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc
@@ -1,7 +1,7 @@
 { /* 4GB (16Gb + 16Gb) for dual rank dram setting */
 	{
-		.impedance_drvp = 0x9,
-		.impedance_drvn = 0xa,
+		.impedance_drvp = 0xc,
+		.impedance_drvn = 0xd,
 		.datlat_ucfirst = 19,
 
 		.ca_train = {
diff --git a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc
index e6c3a83..a9fbcf1 100644
--- a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc
+++ b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc
@@ -1,7 +1,7 @@
 { /* 4GB (16Gb + 16Gb) for dual rank dram setting */
 	{
-		.impedance_drvp = 0x9,
-		.impedance_drvn = 0xa,
+		.impedance_drvp = 0xc,
+		.impedance_drvn = 0xd,
 		.datlat_ucfirst = 18,
 
 		.ca_train = {
diff --git a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-hynix-4GB.inc b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-hynix-4GB.inc
index 099a07c..6e3b203 100644
--- a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-hynix-4GB.inc
+++ b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-hynix-4GB.inc
@@ -1,7 +1,7 @@
 { /* 2GB (8Gb + 8Gb) for single rank dram setting */
 	{
-		.impedance_drvp = 0x9,
-		.impedance_drvn = 0xa,
+		.impedance_drvp = 0xc,
+		.impedance_drvn = 0xd,
 		.datlat_ucfirst = 19,
 
 		.ca_train = {