radeon_hd: Fix bugs in external DP bridge code

* non-external encoder will never be a DP bridge.
* use external encoder in places where needed.
* ensure we look at proper encoder for isDPBridge.

src/add-ons/accelerants/radeon_hd/connector.cpp

@@ -661,8 +661,7 @@ connector_probe()
 								encoder->linkEnumeration
 									= (encoderObjectRaw & ENUM_ID_MASK)
 										>> ENUM_ID_SHIFT;
-								encoder->isDPBridge
-									= encoder_is_dp_bridge(encoderID);
+								encoder->isDPBridge = false;
 
 								pll_limit_probe(&encoder->pll);
 							}
@@ -737,7 +736,7 @@ connector_is_dp(uint32 connectorIndex)
 {
 	if (gConnector[connectorIndex]->type == VIDEO_CONNECTOR_DP
 		|| gConnector[connectorIndex]->type == VIDEO_CONNECTOR_EDP
-		|| gConnector[connectorIndex]->encoder.isDPBridge == true) {
+		|| gConnector[connectorIndex]->encoderExternal.isDPBridge == true) {
 		return true;
 	}
 	return false;

src/add-ons/accelerants/radeon_hd/display.cpp

@@ -259,7 +259,7 @@ detect_displays()
 
 		// TODO: As DP aux transactions don't work yet, just use LVDS as a hack
 		#if 0
-		if (gConnector[id]->encoder.isDPBridge == true) {
+		if (gConnector[id]->encoderExternal.isDPBridge == true) {
 			// If this is a DisplayPort Bridge, setup ddc on bus
 			// TRAVIS (LVDS) or NUTMEG (VGA)
 			TRACE("%s: is bridge, performing bridge DDC setup\n", __func__);

src/add-ons/accelerants/radeon_hd/encoder.cpp

@@ -535,6 +535,7 @@ status_t
 encoder_dig_setup(uint32 connectorIndex, uint32 pixelClock, int command)
 {
 	radeon_shared_info &info = *gInfo->shared_info;
+	connector_info* connector = gConnector[connectorIndex];
 
 	int index = 0;
 	if (info.dceMajor >= 4)
@@ -566,16 +567,14 @@ encoder_dig_setup(uint32 connectorIndex, uint32 pixelClock, int command)
 	union digEncoderControl args;
 	memset(&args, 0, sizeof(args));
 
-	uint32 encoderID = gConnector[connectorIndex]->encoder.objectID;
-	bool isDPBridge = gConnector[connectorIndex]->encoder.isDPBridge;
-
-	bool linkB = gConnector[connectorIndex]->encoder.linkEnumeration
+	bool isDPBridge = connector->encoderExternal.isDPBridge;
+	bool linkB = connector->encoder.linkEnumeration
 		== GRAPH_OBJECT_ENUM_ID2 ? true : false;
 
 	// determine DP panel mode
 	uint32 panelMode;
 	if (info.dceMajor >= 4 && isDPBridge) {
-		if (encoderID == ENCODER_OBJECT_ID_NUTMEG)
+		if (connector->encoderExternal.objectID == ENCODER_OBJECT_ID_NUTMEG)
 			panelMode = DP_PANEL_MODE_INTERNAL_DP1_MODE;
 		else {
 			// aka ENCODER_OBJECT_ID_TRAVIS or VIDEO_CONNECTOR_EDP
@@ -615,7 +614,7 @@ encoder_dig_setup(uint32 connectorIndex, uint32 pixelClock, int command)
 				args.v1.ucConfig |= ATOM_ENCODER_CONFIG_DPLINKRATE_2_70GHZ;
 			}
 
-			switch (encoderID) {
+			switch (connector->encoder.objectID) {
 				case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
 					args.v1.ucConfig = ATOM_ENCODER_CONFIG_V2_TRANSMITTER1;
 					break;

src/add-ons/accelerants/radeon_hd/pll.cpp

@@ -342,10 +342,15 @@ pll_adjust(pll_info* pll, uint8 crtcID)
 		// original as pixel_clock will be adjusted
 
 	uint32 connectorIndex = gDisplay[crtcID]->connectorIndex;
-	uint32 encoderID = gConnector[connectorIndex]->encoder.objectID;
+	connector_info* connector = gConnector[connectorIndex];
+
+	uint32 encoderID = connector->encoder.objectID;
 	uint32 encoderMode = display_get_encoder_mode(connectorIndex);
-	uint32 encoderFlags = gConnector[connectorIndex]->encoder.flags;
-	bool dpBridge = gConnector[connectorIndex]->encoder.isDPBridge;
+	uint32 encoderFlags = connector->encoder.flags;
+
+	uint32 externalEncoderID = 0;
+	if (connector->encoderExternal.isDPBridge)
+		externalEncoderID = connector->encoderExternal.objectID;
 
 	if (info.dceMajor >= 3) {
 
@@ -434,8 +439,7 @@ pll_adjust(pll_info* pll, uint8 crtcID)
 							}
 						}
 
-						args.v3.sInput.ucExtTransmitterID
-							= dpBridge ? encoderID : 0;
+						args.v3.sInput.ucExtTransmitterID = externalEncoderID;
 
 						atom_execute_table(gAtomContext, index, (uint32*)&args);