Change in coreboot[master]: [TEST]mb/google/zork/variants/vilboz: Override phy driving to fix the...

[John Su (Code Review)]

John Su has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/51225 )

Change subject: [TEST]mb/google/zork/variants/vilboz: Override phy driving to fix the eDP noise
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[TEST]mb/google/zork/variants/vilboz: Override phy driving to fix the eDP noise

Override phy driving to fix th eDP noise for WWAN.

BUG=b:171269338
BRANCH=zork
TEST=Check COMMON_MAR_DEEMPH_NOM register and no noise

Signed-off-by: John Su 
Change-Id: I672a001a312e9142c213d463670e1ac825d17299
---
M src/mainboard/google/zork/variants/vilboz/variant.c
1 file changed, 11 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/25/51225/1

diff --git a/src/mainboard/google/zork/variants/vilboz/variant.c b/src/mainboard/google/zork/variants/vilboz/variant.c
index 3816aac..daf84e5 100644
--- a/src/mainboard/google/zork/variants/vilboz/variant.c
+++ b/src/mainboard/google/zork/variants/vilboz/variant.c
@@ -40,8 +40,18 @@
    soc_cfg = config_of_soc();

/* b:/174121847 Use external OSC to mitigate noise for WWAN sku. */
-	if (variant_has_wwan())
+	if (variant_has_wwan()) {
    	soc_cfg->acp_i2s_use_external_48mhz_osc = 1;
+
+		/* b:171269338 Improve WWAN noise floor to
+		   adjust the phy driving setting */
+		soc_cfg->edp_phy_override = ENABLE_EDP_TUNINGSET;
+		soc_cfg->edp_physel = 0x1;
+		soc_cfg->edp_tuningset.dp_vs_pemph_level = 0x1;
+		soc_cfg->edp_tuningset.margin_deemph = 0x004b;
+		soc_cfg->edp_tuningset.deemph_6db4 = 0x0;
+		soc_cfg->edp_tuningset.boostadj = 0x80;
+	}
 }

/*