diff --git a/headers/private/graphics/intel_extreme/intel_extreme.h b/headers/private/graphics/intel_extreme/intel_extreme.h
index 10298f6f40..b6a8de615b 100644
--- a/headers/private/graphics/intel_extreme/intel_extreme.h
+++ b/headers/private/graphics/intel_extreme/intel_extreme.h
@@ -554,14 +554,14 @@ struct intel_free_graphics_memory {
 #define CHV_DISPLAY_PORT_D				(VLV_DISPLAY_BASE + 0x64300)
 
 // DP AUX channels
-#define INTEL_DPA_AUX_CTL				(0x4010 | REGS_NORTH_PIPE_AND_PORT)
-#define INTEL_DPB_AUX_CTL				(0x4110 | REGS_SOUTH_TRANSCODER_PORT)
-#define INTEL_DPC_AUX_CTL				(0x4210 | REGS_SOUTH_TRANSCODER_PORT)
-#define INTEL_DPD_AUX_CTL				(0x4310 | REGS_SOUTH_TRANSCODER_PORT)
+#define INTEL_DP_AUX_CTL_A				(0x4010 | REGS_NORTH_PIPE_AND_PORT)
+#define INTEL_DP_AUX_CTL_B				(0x4110 | REGS_SOUTH_TRANSCODER_PORT)
+#define INTEL_DP_AUX_CTL_C				(0x4210 | REGS_SOUTH_TRANSCODER_PORT)
+#define INTEL_DP_AUX_CTL_D				(0x4310 | REGS_SOUTH_TRANSCODER_PORT)
 
-#define VLV_DPB_AUX_CTL					(VLV_DISPLAY_BASE + 0x64110)
-#define VLV_DPC_AUX_CTL					(VLV_DISPLAY_BASE + 0x64210)
-#define CHV_DPC_AUX_CTL					(VLV_DISPLAY_BASE + 0x64310)
+#define VLV_DP_AUX_CTL_B				(VLV_DISPLAY_BASE + 0x64110)
+#define VLV_DP_AUX_CTL_C				(VLV_DISPLAY_BASE + 0x64210)
+#define CHV_DP_AUX_CTL_D				(VLV_DISPLAY_BASE + 0x64310)
 
 #define INTEL_DP_AUX_CTL_BUSY			(1 << 31)
 #define INTEL_DP_AUX_CTL_DONE			(1 << 30)
diff --git a/src/add-ons/accelerants/intel_extreme/Ports.cpp b/src/add-ons/accelerants/intel_extreme/Ports.cpp
index 60c3544a3f..8d0fc914a7 100644
--- a/src/add-ons/accelerants/intel_extreme/Ports.cpp
+++ b/src/add-ons/accelerants/intel_extreme/Ports.cpp
@@ -834,7 +834,7 @@ HDMIPort::_PortRegister()
 
 DisplayPort::DisplayPort(port_index index, const char* baseName)
 	:
-	DigitalPort(index, baseName)
+	Port(index, baseName)
 {
 }
 
@@ -853,6 +853,35 @@ DisplayPort::IsConnected()
 }
 
 
+addr_t
+DisplayPort::_DDCRegister()
+{
+	// TODO: Do VLV + CHV use the VLV_DP_AUX_CTL_B + VLV_DP_AUX_CTL_C?
+	switch (PortIndex()) {
+		case INTEL_PORT_A:
+			return INTEL_DP_AUX_CTL_A;
+		case INTEL_PORT_B:
+			if (gInfo->shared_info->device_type.InGroup(INTEL_GROUP_VLV))
+				return VLV_DP_AUX_CTL_B;
+			return INTEL_DP_AUX_CTL_B;
+		case INTEL_PORT_C:
+			if (gInfo->shared_info->device_type.InGroup(INTEL_GROUP_VLV))
+				return VLV_DP_AUX_CTL_C;
+			return INTEL_DP_AUX_CTL_C;
+		case INTEL_PORT_D:
+			if (gInfo->shared_info->device_type.InGroup(INTEL_GROUP_CHV))
+				return CHV_DP_AUX_CTL_D;
+			else if (gInfo->shared_info->device_type.InGroup(INTEL_GROUP_VLV))
+				return 0;
+			return INTEL_DP_AUX_CTL_D;
+		default:
+			return 0;
+	}
+
+	return 0;
+}
+
+
 addr_t
 DisplayPort::_PortRegister()
 {
@@ -862,8 +891,10 @@ DisplayPort::_PortRegister()
 	// ignore DisplayPort on ValleyView / CherryView
 
 	if (gInfo->shared_info->device_type.InGroup(INTEL_GROUP_VLV)
-		|| gInfo->shared_info->device_type.InGroup(INTEL_GROUP_CHV))
+		|| gInfo->shared_info->device_type.InGroup(INTEL_GROUP_CHV)) {
+		ERROR("TODO: DisplayPort on ValleyView / CherryView");
 		return 0;
+	}
 
 	// Intel, are humans even involved anymore?
 	// This is a lot more complex than this code makes it look. (see defines)
@@ -894,6 +925,17 @@ DisplayPort::_PortRegister()
 }
 
 
+status_t
+DisplayPort::SetDisplayMode(display_mode* target, uint32 colorMode)
+{
+	TRACE("%s: %s %dx%d\n", __func__, PortName(), target->virtual_width,
+		target->virtual_height);
+
+	ERROR("TODO: DisplayPort\n");
+	return B_ERROR;
+}
+
+
 // #pragma mark - Embedded DisplayPort
 
 
diff --git a/src/add-ons/accelerants/intel_extreme/Ports.h b/src/add-ons/accelerants/intel_extreme/Ports.h
index 996ad61956..e837a07930 100644
--- a/src/add-ons/accelerants/intel_extreme/Ports.h
+++ b/src/add-ons/accelerants/intel_extreme/Ports.h
@@ -170,7 +170,7 @@ virtual addr_t						_PortRegister();
 };
 
 
-class DisplayPort : public DigitalPort {
+class DisplayPort : public Port {
 public:
 									DisplayPort(port_index index,
 										const char* baseName = "DisplayPort");
@@ -180,7 +180,11 @@ virtual	uint32						Type() const
 
 virtual	bool						IsConnected();
 
+virtual status_t					SetDisplayMode(display_mode* mode,
+										uint32 colorMode);
+
 protected:
+virtual	addr_t						_DDCRegister();
 virtual	addr_t						_PortRegister();
 };