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authorShelley Chen <shchen@google.com>2018-08-01 10:41:27 -0700
committerShelley Chen <shchen@google.com>2018-08-02 18:23:25 +0000
commit60c44e2578d43f9a27fba7b860d05bddee153721 (patch)
tree1f63067f8129cc03e45749c3919121b305f65ea3
parent57454563436d02962f48d609aa06273ccb9bbe1a (diff)
downloadcoreboot-60c44e2578d43f9a27fba7b860d05bddee153721.tar.xz
mb/google/poppy/variants/nami: Enable mbox command for ISL VR c-state issue
There is a potential IMVP8 issue for KBL that affects Intersil VRs Nami is using one of the affected parts. The fix is to use an updated microcode and also send a mailbox box command from FSP. BUG=b:112081534 BRANCH=None TEST=Build and boot Nami Verify that suspend/resume and consecutive reboots are working Change-Id: I6ec18a4c3fae6a66cf8a95685d91a8ba51e2697c Signed-off-by: Shelley Chen <shchen@google.com> Reviewed-on: https://review.coreboot.org/27780 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
-rw-r--r--src/mainboard/google/poppy/variants/nami/devicetree.cb4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mainboard/google/poppy/variants/nami/devicetree.cb b/src/mainboard/google/poppy/variants/nami/devicetree.cb
index 3835573720..d505099b94 100644
--- a/src/mainboard/google/poppy/variants/nami/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nami/devicetree.cb
@@ -58,6 +58,10 @@ chip soc/intel/skylake
register "PmTimerDisabled" = "1"
register "VmxEnable" = "1"
+ # Intersil VR c-state issue workaround
+ # send VR mailbox command for IA/GT/SA rails
+ register "IslVrCmd" = "2"
+
register "pirqa_routing" = "PCH_IRQ11"
register "pirqb_routing" = "PCH_IRQ10"
register "pirqc_routing" = "PCH_IRQ11"