[coreboot-gerrit] Change in coreboot[master]: soc/amd/stoneyridge/northbridge.c: Enable eDP HIGH_VDIFF

[Richard Spiegel (Code Review)]

Richard Spiegel has uploaded this change for review. ( https://review.coreboot.org/27625

Change subject: soc/amd/stoneyridge/northbridge.c: Enable eDP HIGH_VDIFF
......................................................................

soc/amd/stoneyridge/northbridge.c: Enable eDP HIGH_VDIFF

The careena board needs different video setting to pass eye diagram test,
which does not affect negatively the grunt board. In preparation for new
VBIOS, AGESA environment needs eDP high vdiff enabled.

BUG=b:111673328
TEST=Add debug code to AGESA to display setted eDP. Build AGESA. Build and
boot grunt. Add new code to grunt, build and boot, verify eDP changed.

Change-Id: Ic0452618bfc5e05b9ef8280bb8ba398ec7b4ce95
Signed-off-by: Richard Spiegel 
---
M src/soc/amd/stoneyridge/northbridge.c
1 file changed, 1 insertion(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/25/27625/1

diff --git a/src/soc/amd/stoneyridge/northbridge.c b/src/soc/amd/stoneyridge/northbridge.c
index 6af1351..71fcf58 100644
--- a/src/soc/amd/stoneyridge/northbridge.c
+++ b/src/soc/amd/stoneyridge/northbridge.c
@@ -484,6 +484,7 @@
 void SetNbEnvParams(GNB_ENV_CONFIGURATION *params)
 {
    params->IommuSupport = FALSE;
+	params->EDPv1_4VSMode = EDP_VS_HIGH_VDIFF_MODE;
 }

void SetNbMidParams(GNB_MID_CONFIGURATION *params)