diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 4c42cc4b193b8798a23053d40733ae8b20a9cc8b..f7f771749e4809dcedbea023bea54e4be4ac1537 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -1329,11 +1329,13 @@ parse_general_definitions(struct drm_i915_private *dev_priv,
 		expected_size = LEGACY_CHILD_DEVICE_CONFIG_SIZE;
 	} else if (bdb->version == 195) {
 		expected_size = 37;
-	} else if (bdb->version <= 197) {
+	} else if (bdb->version <= 215) {
 		expected_size = 38;
+	} else if (bdb->version <= 216) {
+		expected_size = 39;
 	} else {
-		expected_size = 38;
-		BUILD_BUG_ON(sizeof(*child) < 38);
+		expected_size = sizeof(*child);
+		BUILD_BUG_ON(sizeof(*child) < 39);
 		DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
 				 bdb->version, expected_size);
 	}
diff --git a/drivers/gpu/drm/i915/intel_vbt_defs.h b/drivers/gpu/drm/i915/intel_vbt_defs.h
index e3d7745a91518a6c031d03ffb0e9de551cfb11bc..98dff6058d3c92a50dddc0d0634879d9efdcbdbd 100644
--- a/drivers/gpu/drm/i915/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/intel_vbt_defs.h
@@ -412,6 +412,8 @@ struct child_device_config {
 	u16 dp_gpio_pin_num;					/* 195 */
 	u8 dp_iboost_level:4;					/* 196 */
 	u8 hdmi_iboost_level:4;					/* 196 */
+	u8 dp_max_link_rate:2;					/* 216 CNL+ */
+	u8 dp_max_link_rate_reserved:6;				/* 216 */
 } __packed;
 
 struct bdb_general_definitions {