diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 4d06178cd76c..e6e93d01d0ce 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -582,6 +582,34 @@ static const struct cnl_ddi_buf_trans ehl_combo_phy_ddi_translations_dp[] = {
 	{ 0x6, 0x7F, 0x3F, 0x00, 0x00 },	/* 900   900      0.0   */
 };
 
+static const struct cnl_ddi_buf_trans jsl_combo_phy_ddi_translations_edp_hbr[] = {
+						/* NT mV Trans mV db    */
+	{ 0x8, 0x7F, 0x3F, 0x00, 0x00 },	/* 200   200      0.0   */
+	{ 0x8, 0x7F, 0x38, 0x00, 0x07 },	/* 200   250      1.9   */
+	{ 0x1, 0x7F, 0x33, 0x00, 0x0C },	/* 200   300      3.5   */
+	{ 0xA, 0x35, 0x36, 0x00, 0x09 },	/* 200   350      4.9   */
+	{ 0x8, 0x7F, 0x3F, 0x00, 0x00 },	/* 250   250      0.0   */
+	{ 0x1, 0x7F, 0x38, 0x00, 0x07 },	/* 250   300      1.6   */
+	{ 0xA, 0x35, 0x35, 0x00, 0x0A },	/* 250   350      2.9   */
+	{ 0x1, 0x7F, 0x3F, 0x00, 0x00 },	/* 300   300      0.0   */
+	{ 0xA, 0x35, 0x38, 0x00, 0x07 },	/* 300   350      1.3   */
+	{ 0xA, 0x35, 0x3F, 0x00, 0x00 },	/* 350   350      0.0   */
+};
+
+static const struct cnl_ddi_buf_trans jsl_combo_phy_ddi_translations_edp_hbr2[] = {
+						/* NT mV Trans mV db    */
+	{ 0x8, 0x7F, 0x3F, 0x00, 0x00 },	/* 200   200      0.0   */
+	{ 0x8, 0x7F, 0x3F, 0x00, 0x00 },	/* 200   250      1.9   */
+	{ 0x1, 0x7F, 0x3D, 0x00, 0x02 },	/* 200   300      3.5   */
+	{ 0xA, 0x35, 0x38, 0x00, 0x07 },	/* 200   350      4.9   */
+	{ 0x8, 0x7F, 0x3F, 0x00, 0x00 },	/* 250   250      0.0   */
+	{ 0x1, 0x7F, 0x3F, 0x00, 0x00 },	/* 250   300      1.6   */
+	{ 0xA, 0x35, 0x3A, 0x00, 0x05 },	/* 250   350      2.9   */
+	{ 0x1, 0x7F, 0x3F, 0x00, 0x00 },	/* 300   300      0.0   */
+	{ 0xA, 0x35, 0x38, 0x00, 0x07 },	/* 300   350      1.3   */
+	{ 0xA, 0x35, 0x3F, 0x00, 0x00 },	/* 350   350      0.0   */
+};
+
 struct icl_mg_phy_ddi_buf_trans {
 	u32 cri_txdeemph_override_11_6;
 	u32 cri_txdeemph_override_5_0;
@@ -1069,7 +1097,6 @@ icl_get_mg_buf_trans(struct intel_encoder *encoder, int type, int rate,
 	*n_entries = ARRAY_SIZE(icl_mg_phy_ddi_translations_rbr_hbr);
 	return icl_mg_phy_ddi_translations_rbr_hbr;
 }
-
 static const struct cnl_ddi_buf_trans *
 ehl_get_combo_buf_trans(struct intel_encoder *encoder, int type, int rate,
 			int *n_entries)
@@ -1098,6 +1125,34 @@ ehl_get_combo_buf_trans(struct intel_encoder *encoder, int type, int rate,
 	}
 }
 
+static const struct cnl_ddi_buf_trans *
+jsl_get_combo_buf_trans(struct intel_encoder *encoder, int type, int rate,
+			int *n_entries)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+
+	switch (type) {
+	case INTEL_OUTPUT_HDMI:
+		*n_entries = ARRAY_SIZE(icl_combo_phy_ddi_translations_hdmi);
+		return icl_combo_phy_ddi_translations_hdmi;
+	case INTEL_OUTPUT_EDP:
+		if (dev_priv->vbt.edp.low_vswing) {
+			if (rate > 270000) {
+				*n_entries = ARRAY_SIZE(jsl_combo_phy_ddi_translations_edp_hbr2);
+				return jsl_combo_phy_ddi_translations_edp_hbr2;
+			} else {
+				*n_entries = ARRAY_SIZE(jsl_combo_phy_ddi_translations_edp_hbr);
+				return jsl_combo_phy_ddi_translations_edp_hbr;
+			}
+		}
+		/* fall through */
+	default:
+		/* All combo DP and eDP ports that do not support low_vswing */
+		*n_entries = ARRAY_SIZE(icl_combo_phy_ddi_translations_dp_hbr2);
+		return icl_combo_phy_ddi_translations_dp_hbr2;
+	}
+}
+
 static const struct cnl_ddi_buf_trans *
 tgl_get_combo_buf_trans(struct intel_encoder *encoder, int type, int rate,
 			int *n_entries)
@@ -2265,7 +2320,10 @@ static u8 intel_ddi_dp_voltage_max(struct intel_dp *intel_dp)
 			tgl_get_dkl_buf_trans(encoder, encoder->type,
 					      intel_dp->link_rate, &n_entries);
 	} else if (INTEL_GEN(dev_priv) == 11) {
-		if (IS_ELKHARTLAKE(dev_priv))
+		if (HAS_PCH_JSP(dev_priv))
+			jsl_get_combo_buf_trans(encoder, encoder->type,
+						intel_dp->link_rate, &n_entries);
+		else if (HAS_PCH_MCC(dev_priv))
 			ehl_get_combo_buf_trans(encoder, encoder->type,
 						intel_dp->link_rate, &n_entries);
 		else if (intel_phy_is_combo(dev_priv, phy))
@@ -2454,7 +2512,10 @@ static void icl_ddi_combo_vswing_program(struct intel_encoder *encoder,
 	if (INTEL_GEN(dev_priv) >= 12)
 		ddi_translations = tgl_get_combo_buf_trans(encoder, type, rate,
 							   &n_entries);
-	else if (IS_ELKHARTLAKE(dev_priv))
+	else if (HAS_PCH_JSP(dev_priv))
+		ddi_translations = jsl_get_combo_buf_trans(encoder, type, rate,
+							   &n_entries);
+	else if (HAS_PCH_MCC(dev_priv))
 		ddi_translations = ehl_get_combo_buf_trans(encoder, type, rate,
 							   &n_entries);
 	else
