Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/16709
-gerrit
commit 6e8d30fb995c10d5e5b1353be69d9c529a7f2506 Author: Lin Huang hl@rock-chips.com Date: Thu Sep 8 11:16:26 2016 -0700
rockchip: rk3399: lower down kevin board sdram frequency to 800MHz
we found some board not stable when sdram run 933Mhz, before we fix it, we need to lower down the sdram frequency to 800MHz. In this patch we modify the DQS delay from 0x280 to 0x260, extend the DQS window.
BRANCH=None BUG=chrome-os-partner:56940 TEST=Booted Kevin.
Change-Id: I68561c4aa4d9ab66acfa3515a42d696157aff759 Signed-off-by: Patrick Georgi pgeorgi@chromium.org Original-Commit-Id: 877a7f6ad22a5bde9f9e458bcb65f133f2f001bd Original-Change-Id: I5eab6bbe96f0dae095c5353403292022e7a25421 Original-Signed-off-by: Lin Huang hl@rock-chips.com Original-Reviewed-on: https://chromium-review.googlesource.com/382724 Original-Commit-Ready: Douglas Anderson dianders@chromium.org Original-Tested-by: Douglas Anderson dianders@chromium.org Original-Reviewed-by: Douglas Anderson dianders@chromium.org --- src/mainboard/google/gru/sdram_configs.c | 4 +-- .../gru/sdram_params/sdram-lpddr3-hynix-4GB-800.c | 40 +++++++++++----------- 2 files changed, 21 insertions(+), 23 deletions(-)
diff --git a/src/mainboard/google/gru/sdram_configs.c b/src/mainboard/google/gru/sdram_configs.c index 2ececdf..1235eff 100644 --- a/src/mainboard/google/gru/sdram_configs.c +++ b/src/mainboard/google/gru/sdram_configs.c @@ -56,10 +56,8 @@ static enum dram_speeds get_sdram_index(void) return dram_200MHz; case 3: return dram_666MHz_NO_ODT; - case 4: - return dram_800MHz; default: - return dram_933MHz; + return dram_800MHz; }
if (IS_ENABLED(CONFIG_BOARD_GOOGLE_GRU)) diff --git a/src/mainboard/google/gru/sdram_params/sdram-lpddr3-hynix-4GB-800.c b/src/mainboard/google/gru/sdram_params/sdram-lpddr3-hynix-4GB-800.c index 3a937bf..034e9d8 100644 --- a/src/mainboard/google/gru/sdram_params/sdram-lpddr3-hynix-4GB-800.c +++ b/src/mainboard/google/gru/sdram_params/sdram-lpddr3-hynix-4GB-800.c @@ -660,11 +660,11 @@ struct rk3399_sdram_params params = { 0x00000000, /* DENALI_PHY_56_DATA */ 0x00000000, /* DENALI_PHY_57_DATA */ 0x00000000, /* DENALI_PHY_58_DATA */ - 0x02800280, /* DENALI_PHY_59_DATA */ - 0x02800280, /* DENALI_PHY_60_DATA */ - 0x02800280, /* DENALI_PHY_61_DATA */ - 0x02800280, /* DENALI_PHY_62_DATA */ - 0x00000280, /* DENALI_PHY_63_DATA */ + 0x02600260, /* DENALI_PHY_59_DATA */ + 0x02600260, /* DENALI_PHY_60_DATA */ + 0x02600260, /* DENALI_PHY_61_DATA */ + 0x02600260, /* DENALI_PHY_62_DATA */ + 0x00000260, /* DENALI_PHY_63_DATA */ 0x00000000, /* DENALI_PHY_64_DATA */ 0x00000000, /* DENALI_PHY_65_DATA */ 0x00000000, /* DENALI_PHY_66_DATA */ @@ -788,11 +788,11 @@ struct rk3399_sdram_params params = { 0x00000000, /* DENALI_PHY_184_DATA */ 0x00000000, /* DENALI_PHY_185_DATA */ 0x00000000, /* DENALI_PHY_186_DATA */ - 0x02800280, /* DENALI_PHY_187_DATA */ - 0x02800280, /* DENALI_PHY_188_DATA */ - 0x02800280, /* DENALI_PHY_189_DATA */ - 0x02800280, /* DENALI_PHY_190_DATA */ - 0x00000280, /* DENALI_PHY_191_DATA */ + 0x02600260, /* DENALI_PHY_187_DATA */ + 0x02600260, /* DENALI_PHY_188_DATA */ + 0x02600260, /* DENALI_PHY_189_DATA */ + 0x02600260, /* DENALI_PHY_190_DATA */ + 0x00000260, /* DENALI_PHY_191_DATA */ 0x00000000, /* DENALI_PHY_192_DATA */ 0x00000000, /* DENALI_PHY_193_DATA */ 0x00000000, /* DENALI_PHY_194_DATA */ @@ -916,11 +916,11 @@ struct rk3399_sdram_params params = { 0x00000000, /* DENALI_PHY_312_DATA */ 0x00000000, /* DENALI_PHY_313_DATA */ 0x00000000, /* DENALI_PHY_314_DATA */ - 0x02800280, /* DENALI_PHY_315_DATA */ - 0x02800280, /* DENALI_PHY_316_DATA */ - 0x02800280, /* DENALI_PHY_317_DATA */ - 0x02800280, /* DENALI_PHY_318_DATA */ - 0x00000280, /* DENALI_PHY_319_DATA */ + 0x02600260, /* DENALI_PHY_315_DATA */ + 0x02600260, /* DENALI_PHY_316_DATA */ + 0x02600260, /* DENALI_PHY_317_DATA */ + 0x02600260, /* DENALI_PHY_318_DATA */ + 0x00000260, /* DENALI_PHY_319_DATA */ 0x00000000, /* DENALI_PHY_320_DATA */ 0x00000000, /* DENALI_PHY_321_DATA */ 0x00000000, /* DENALI_PHY_322_DATA */ @@ -1044,11 +1044,11 @@ struct rk3399_sdram_params params = { 0x00000000, /* DENALI_PHY_440_DATA */ 0x00000000, /* DENALI_PHY_441_DATA */ 0x00000000, /* DENALI_PHY_442_DATA */ - 0x02800280, /* DENALI_PHY_443_DATA */ - 0x02800280, /* DENALI_PHY_444_DATA */ - 0x02800280, /* DENALI_PHY_445_DATA */ - 0x02800280, /* DENALI_PHY_446_DATA */ - 0x00000280, /* DENALI_PHY_447_DATA */ + 0x02600260, /* DENALI_PHY_443_DATA */ + 0x02600260, /* DENALI_PHY_444_DATA */ + 0x02600260, /* DENALI_PHY_445_DATA */ + 0x02600260, /* DENALI_PHY_446_DATA */ + 0x00000260, /* DENALI_PHY_447_DATA */ 0x00000000, /* DENALI_PHY_448_DATA */ 0x00000000, /* DENALI_PHY_449_DATA */ 0x00000000, /* DENALI_PHY_450_DATA */