550.67

src/common/displayport/inc/dp_connectorimpl.h

@@ -348,6 +348,9 @@ namespace DisplayPort
         //
         bool        bPowerDownPhyBeforeD3;
 
+        // Force DSC on sink irrespective of LT status
+        bool        bForceDscOnSink;
+
         //
         // Reset the MSTM_CTRL registers on branch device irrespective of
         // IRQ VECTOR register having stale message. Certain branch devices

src/common/displayport/inc/dp_linkconfig.h

@@ -294,8 +294,8 @@ namespace DisplayPort
             else
             {
                 // if FEC is not enabled, link overhead comprises only of
-                // 0.05% downspread.
-                return rate - 5 * rate/ 1000;
+                // 0.6% downspread.
+                return rate - 6 * rate/ 1000;
 
             }
         }

src/common/displayport/inc/dp_regkeydatabase.h

@@ -79,6 +79,11 @@
 //
 #define NV_DP_REGKEY_MST_PCON_CAPS_READ_DISABLED       "DP_BUG_4388987_WAR"
 
+//
+// Bug 4459839 : This regkey will enable DSC irrespective of LT status.
+//
+#define NV_DP_REGKEY_FORCE_DSC_ON_SINK                 "DP_FORCE_DSC_ON_SINK"
+
 //
 // Data Base used to store all the regkey values.
 // The actual data base is declared statically in dp_evoadapter.cpp.
@@ -113,6 +118,7 @@ struct DP_REGKEY_DATABASE
     bool  bPowerDownPhyBeforeD3;
     bool  bReassessMaxLink;
     bool  bMSTPCONCapsReadDisabled;
+    bool  bForceDscOnSink;
 };
 
 #endif //INCLUDED_DP_REGKEYDATABASE_H