Patrick Georgi submitted this change.
mb/google/volteer/variants/terrador: Enable Cmd Mirror
Enable CmdMirror for Terrador to achieve optimum routing from SoC to
DRAMs
BUG=b:156435028
BRANCH=none
TEST=FW_NAME=terrador emerge-volteer coreboot chromeos-bootimage
Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com>
Change-Id: I0db9fff0dddf35c99a6cb2a90d40886ed8e18686
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42274
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
---
M src/mainboard/google/volteer/variants/terrador/overridetree.cb
1 file changed, 5 insertions(+), 0 deletions(-)
diff --git a/src/mainboard/google/volteer/variants/terrador/overridetree.cb b/src/mainboard/google/volteer/variants/terrador/overridetree.cb
index 4bff10d..81da6bd 100644
--- a/src/mainboard/google/volteer/variants/terrador/overridetree.cb
+++ b/src/mainboard/google/volteer/variants/terrador/overridetree.cb
@@ -1,4 +1,9 @@
chip soc/intel/tigerlake
+ # BitMask where bits [3:0] are Controller 0 Channel [3:0] and
+ # bits [7:4] are Controller 1 Channel [3:0].
+ # Enable Command Mirroring for controller 0 channel 0 and 1,
+ # and controller 1 channel 0 and 1.
+ register "CmdMirror" = "0x00000033"
device domain 0 on
device pci 15.1 on
chip drivers/i2c/hid
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