diff --git a/drivers/gpu/drm/i915/intel_bios.h b/drivers/gpu/drm/i915/intel_bios.h
index a59122731efd..46cd5c7ebacd 100644
--- a/drivers/gpu/drm/i915/intel_bios.h
+++ b/drivers/gpu/drm/i915/intel_bios.h
@@ -758,11 +758,6 @@ int intel_parse_bios(struct drm_device *dev);
 #define		DVO_C		2
 #define		DVO_D		3
 
-/* define the PORT for DP output type */
-#define		PORT_IDPB	7
-#define		PORT_IDPC	8
-#define		PORT_IDPD	9
-
 /* Possible values for the "DVO Port" field for versions >= 155: */
 #define DVO_PORT_HDMIA	0
 #define DVO_PORT_HDMIB	1
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 94686cb7621e..32663b1933f1 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5015,16 +5015,17 @@ intel_trans_dp_port_sel(struct drm_crtc *crtc)
 	return -1;
 }
 
-/* check the VBT to see whether the eDP is on DP-D port */
+/* check the VBT to see whether the eDP is on another port */
 bool intel_dp_is_edp(struct drm_device *dev, enum port port)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	union child_device_config *p_child;
 	int i;
 	static const short port_mapping[] = {
-		[PORT_B] = PORT_IDPB,
-		[PORT_C] = PORT_IDPC,
-		[PORT_D] = PORT_IDPD,
+		[PORT_B] = DVO_PORT_DPB,
+		[PORT_C] = DVO_PORT_DPC,
+		[PORT_D] = DVO_PORT_DPD,
+		[PORT_E] = DVO_PORT_DPE,
 	};
 
 	if (port == PORT_A)