Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/18005
-gerrit
commit 43cbf6cc16d0eeee579a98a13ec4a40d97ccc3b4 Author: Nicolas Boichat drinkcat@google.com Date: Wed Dec 14 17:26:12 2016 +0800
Revert "google/oak: increase the driving strength for 4GB DRAMs"
This reverts commit 34a6537512d412363bf56428b7ae284e6dd80fb3, which appears to cause random stability issues on some elm units.
BRANCH=oak BUG=chrome-os-partner:60869 BUG=chromium:673349 TEST=None
Change-Id: I5ce9e2673db1bc7a1f487a3c3bcce4651a5e3567 Reviewed-on: https://chromium-review.googlesource.com/419862 Commit-Ready: Nicolas Boichat drinkcat@chromium.org Tested-by: Nicolas Boichat drinkcat@chromium.org Reviewed-by: Julius Werner jwerner@chromium.org --- .../google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc | 4 ++-- src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc | 4 ++-- src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc index 6e3b203..099a07c 100644 --- a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc +++ b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc @@ -1,7 +1,7 @@ { /* 2GB (8Gb + 8Gb) for single rank dram setting */ { - .impedance_drvp = 0xc, - .impedance_drvn = 0xd, + .impedance_drvp = 0x9, + .impedance_drvn = 0xa, .datlat_ucfirst = 19,
.ca_train = { 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 f03f858..0fe16a6 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 = 0xc, - .impedance_drvn = 0xd, + .impedance_drvp = 0x9, + .impedance_drvn = 0xa, .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 a9fbcf1..e6c3a83 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 = 0xc, - .impedance_drvn = 0xd, + .impedance_drvp = 0x9, + .impedance_drvn = 0xa, .datlat_ucfirst = 18,
.ca_train = {