[coreboot-gerrit] [S] Change in coreboot[master]: soc/intel/common: Fix the TCSS DisplayPort detection flow

[John Zhao (Code Review)]

John Zhao has uploaded a new patch set (#2) to the change originally created by John Zhao. ( https://review.coreboot.org/c/coreboot/+/69694 )

Change subject: soc/intel/common: Fix the TCSS DisplayPort detection flow
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soc/intel/common: Fix the TCSS DisplayPort detection flow

After DisplayPort is plugged into type-C port, its hpd signal
instantly presents and EC has mux_info for dp and hpd. This change
fixes the DP detection flow to avoid the 1 second delay while no DP
is connected. If DP is present, there will be requests towards PMC
through the sequence of connect, safe mode, dp and hpd mode.

BUG=b:247670186
TEST=Built image and validated the DisplayPort preboot feature on Rex.

Change-Id: I7cb95ec7fcc7e1a86e86466e6d45390eedcc4531
Signed-off-by: zhaojohn 
---
M src/soc/intel/common/block/tcss/tcss.c
1 file changed, 21 insertions(+), 18 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/94/69694/2