Ashish Kumar Mishra has uploaded this change for review.
mb/google/brox: Disable Tccold Handshake
This patch disables Tccold Handshake to prevent possible display flicker
issue for Brox. Please refer Intel doc#723158 for information.
BUG=None
BRANCH=None
TEST=Boot Brox, verify upd setting.
Change-Id: Ifcc5937bb78d3226100df5db1b9e7737083963a7
Signed-off-by: Ashish Kumar Mishra <ashish.k.mishra@intel.com>
---
M src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb
1 file changed, 4 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/05/82105/1
diff --git a/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb b/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb
index f901db9..a4018c2 100644
--- a/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb
+++ b/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb
@@ -21,6 +21,10 @@
# seen on J0 and Q0 SKUs
register "disable_package_c_state_demotion" = "1"
+ # As per Intel Advisory doc#723158, the change is required to prevent possible
+ # display flickering issue.
+ register "disable_dynamic_tccold_handshake" = "true"
+
# DPTF enable
register "dptf_enable" = "1"
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