From 5b5656565ba4046f7d7fdc61d9fc79a1f67993be Mon Sep 17 00:00:00 2001 From: marxwang Date: Tue, 11 Sep 2018 12:08:23 +0800 Subject: [PATCH] mb/google/poppy/variants/rammus: Disable command TriState for rammus This patch sets the MRC UPD "CmdTriStateDis" to disable TriState for the rammus boards. Rammus is LPDDR3 design without RTT for CMD/CTRL. BUG=none TEST=Run memtester app and also webgl fishtank on the LPDDR3 kabylake boards and also check the margin data is proper in FSP. Change-Id: Iee115f49ba5b36dc5b0425e9da02b58cd19b2236 Signed-off-by: Marx Wang Reviewed-on: https://review.coreboot.org/28568 Reviewed-by: Paul Menzel Reviewed-by: Martin Roth Tested-by: build bot (Jenkins) --- src/mainboard/google/poppy/variants/rammus/devicetree.cb | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/mainboard/google/poppy/variants/rammus/devicetree.cb b/src/mainboard/google/poppy/variants/rammus/devicetree.cb index 3478744137..7b851ac811 100644 --- a/src/mainboard/google/poppy/variants/rammus/devicetree.cb +++ b/src/mainboard/google/poppy/variants/rammus/devicetree.cb @@ -27,6 +27,9 @@ chip soc/intel/skylake # Enable S0ix register "s0ix_enable" = "1" + # Disable Command TriState + register "CmdTriStateDis" = "1" + # FSP Configuration register "ProbelessTrace" = "0" register "EnableLan" = "0"