diff --git a/driver/tcpm/anx74xx.c b/driver/tcpm/anx74xx.c
index 652259ef1a..ed38fccb23 100644
--- a/driver/tcpm/anx74xx.c
+++ b/driver/tcpm/anx74xx.c
@@ -778,6 +778,14 @@ int anx74xx_tcpm_init(int port)
 	/*  HPD pin output enable*/
 	rv |= tcpc_write(port, ANX74XX_REG_HPD_CTRL_0, ANX74XX_REG_HPD_DEFAULT);
 
+	if (rv)
+		return EC_ERROR_UNKNOWN;
+
+	/* Decrease BMC TX lowest swing voltage */
+	rv |= tcpc_read(port, ANX74XX_REG_ANALOG_CTRL_11, &reg);
+	if (rv)
+		return EC_ERROR_UNKNOWN;
+	rv = tcpc_write(port, ANX74XX_REG_ANALOG_CTRL_11, (reg & 0x3f) | 0x40);
 	if (rv)
 		return EC_ERROR_UNKNOWN;
 
diff --git a/driver/tcpm/anx74xx.h b/driver/tcpm/anx74xx.h
index b25de49bf4..972be9648a 100644
--- a/driver/tcpm/anx74xx.h
+++ b/driver/tcpm/anx74xx.h
@@ -69,6 +69,8 @@
 #define ANX74XX_REG_AUX_SWAP_SET_CC1	0x30
 #define ANX74XX_REG_AUX_SWAP_SET_CC2	0xc0
 
+#define ANX74XX_REG_ANALOG_CTRL_11		0x4c
+
 #define ANX74XX_REG_MUX_DP_MODE_ACE_CC1	0x49
 #define ANX74XX_REG_MUX_DP_MODE_ACE_CC2	0x86
 #define ANX74XX_REG_MUX_DP_MODE_BDF_CC1	0x61