[XS] Change in coreboot[master]: mb/starlabs/starbook/rpl: Disable dynamic Tc-cold handshake

[Martin L Roth (Code Review)]

Martin L Roth has submitted this change. ( https://review.coreboot.org/c/coreboot/+/77564?usp=email )

Change subject: mb/starlabs/starbook/rpl: Disable dynamic Tc-cold handshake
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mb/starlabs/starbook/rpl: Disable dynamic Tc-cold handshake

With the Tc-cold handshake, there's a fast flicker when connecting
external displays. With it disabled, it's just one "flick", so use
this as it's lesser of two evils.

Signed-off-by: Sean Rhodes 
Change-Id: Ie42b935d3e69beff6a1e503a8dee69554123b4f0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77564
Tested-by: build bot (Jenkins) 
Reviewed-by: Matt DeVillier 
---
M src/mainboard/starlabs/starbook/variants/rpl/devicetree.cb
1 file changed, 2 insertions(+), 0 deletions(-)

Approvals:
  Matt DeVillier: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/src/mainboard/starlabs/starbook/variants/rpl/devicetree.cb b/src/mainboard/starlabs/starbook/variants/rpl/devicetree.cb
index 7a9fd3c..02d3c7b 100644
--- a/src/mainboard/starlabs/starbook/variants/rpl/devicetree.cb
+++ b/src/mainboard/starlabs/starbook/variants/rpl/devicetree.cb
@@ -9,6 +9,8 @@
    register "cnvi_bt_core"			= "1"
    register "cnvi_bt_audio_offload"	= "1"

+	register "disable_dynamic_tccold_handshake" = "1"
+
    # Serial I/O
    register "serial_io_i2c_mode" = "{
    	[PchSerialIoIndexI2C0]		= PchSerialIoPci,