diff --git a/software/sys_controller/it6613/HDMI_TX.c b/software/sys_controller/it6613/HDMI_TX.c
index 9d262f0..57241d7 100644
--- a/software/sys_controller/it6613/HDMI_TX.c
+++ b/software/sys_controller/it6613/HDMI_TX.c
@@ -360,5 +360,27 @@ void HDMITX_SetHDRInfoFrame(BYTE HDR_TF)
     HDRInfo.pktbyte.HDR_DB[24] = 0xfa;
     HDRInfo.pktbyte.HDR_DB[25] = 0x00;*/
 
-    EnableHDRInfoFrame(TRUE, (BYTE *) &HDRInfo);
+    EnableGPInfoFrame(TRUE, (BYTE *) &HDRInfo);
 }
+
+void HDMITX_SetVRRInfoFrame(BYTE enable)
+{
+    int i;
+    Freesync_InfoFrame VRRInfo;
+
+    VRRInfo.info.Type = SPD_INFOFRAME_TYPE;
+    VRRInfo.info.Ver = VENDORSPEC_INFOFRAME_VER;
+    VRRInfo.info.Len = VENDORSPEC_INFOFRAME_LEN;
+
+    VRRInfo.info.Enable = enable ? 0x1a : 0;
+    VRRInfo.info.Mode2 = 0x07;
+    VRRInfo.info.min_rate = 40;
+    VRRInfo.info.max_rate = 144;
+
+    for (i=1; i<VENDORSPEC_INFOFRAME_LEN-3; i++) {
+        VRRInfo.pktbyte.FS_DB[i] = 0;
+    }
+
+    EnableGPInfoFrame(TRUE, (BYTE *) &VRRInfo);
+}
+
diff --git a/software/sys_controller/it6613/HDMI_TX.h b/software/sys_controller/it6613/HDMI_TX.h
index ce3a259..d42db2f 100644
--- a/software/sys_controller/it6613/HDMI_TX.h
+++ b/software/sys_controller/it6613/HDMI_TX.h
@@ -28,5 +28,6 @@ void HDMITX_SetOutputColorDepth(int ColorDepth);
 
 void HDMITX_SetAudioInfoFrame(BYTE bAudioDwSampling);
 void HDMITX_SetHDRInfoFrame(BYTE enableHDR);
+void HDMITX_SetVRRInfoFrame(BYTE enable);
 
 #endif /*HDMI_TX_H_*/
diff --git a/software/sys_controller/it6613/it6613_drv.c b/software/sys_controller/it6613/it6613_drv.c
index 5226085..42fde5e 100644
--- a/software/sys_controller/it6613/it6613_drv.c
+++ b/software/sys_controller/it6613/it6613_drv.c
@@ -80,7 +80,7 @@ static SYS_STATUS SetAVIInfoFrame(AVI_InfoFrame *pAVIInfoFrame) ;
 static SYS_STATUS SetAudioInfoFrame(Audio_InfoFrame *pAudioInfoFrame) ;
 static SYS_STATUS SetSPDInfoFrame(SPD_InfoFrame *pSPDInfoFrame) ;
 static SYS_STATUS SetMPEGInfoFrame(MPEG_InfoFrame *pMPGInfoFrame) ;
-static SYS_STATUS SetHDRInfoFrame(HDR_InfoFrame *pHDRInfoFrame) ;
+static SYS_STATUS SetGPInfoFrame(BYTE *pInfoFrameData) ;
 static SYS_STATUS ReadEDID(BYTE *pData,BYTE bSegment,BYTE offset,SHORT Count) ;
 static void AbortDDC() ;
 static void ClearDDCFIFO() ;
@@ -825,14 +825,14 @@ EnableAudioInfoFrame(BYTE bEnable,BYTE *pAudioInfoFrame)
 }
 
 BOOL
-EnableHDRInfoFrame(BYTE bEnable, BYTE *pHDRInfoFrame)
+EnableGPInfoFrame(BYTE bEnable, BYTE *pInfoFrame)
 {
     if (!bEnable) {
         DISABLE_NULL_PKT();
         return TRUE;
     }
 
-    if(SetHDRInfoFrame((HDR_InfoFrame *)pHDRInfoFrame) == ER_SUCCESS)
+    if(SetGPInfoFrame(pInfoFrame) == ER_SUCCESS)
     {
         return TRUE;
     }
@@ -3390,28 +3390,29 @@ SetAudioInfoFrame(Audio_InfoFrame *pAudioInfoFrame)
 }
 
 static SYS_STATUS
-SetHDRInfoFrame(HDR_InfoFrame *pHDRInfoFrame)
+SetGPInfoFrame(BYTE *pInfoFrameData)
 {
     int i ;
     BYTE ucData ;
+    HDR_InfoFrame *pInfoFrame = (HDR_InfoFrame*)pInfoFrameData;
 
-    if(!pHDRInfoFrame)
+    if(!pInfoFrame)
     {
         return ER_FAIL ;
     }
 
     Switch_HDMITX_Bank(1) ;
 
-    HDMITX_WriteI2C_Byte(REG_TX_PKT_HB00, (0x80+pHDRInfoFrame->info.Type));
-    HDMITX_WriteI2C_Byte(REG_TX_PKT_HB01, pHDRInfoFrame->info.Ver);
-    HDMITX_WriteI2C_Byte(REG_TX_PKT_HB02, pHDRInfoFrame->info.Len);
+    HDMITX_WriteI2C_Byte(REG_TX_PKT_HB00, (0x80+pInfoFrame->info.Type));
+    HDMITX_WriteI2C_Byte(REG_TX_PKT_HB01, pInfoFrame->info.Ver);
+    HDMITX_WriteI2C_Byte(REG_TX_PKT_HB02, pInfoFrame->info.Len);
 
-    for(i = 0,ucData = 0 ; i< HDR_INFOFRAME_LEN ; i++)
+    for(i = 0,ucData = 0 ; i< pInfoFrame->info.Len ; i++)
     {
-        HDMITX_WriteI2C_Byte(REG_TX_PKT_PB01+i, pHDRInfoFrame->pktbyte.HDR_DB[i]);
-        ucData -= pHDRInfoFrame->pktbyte.HDR_DB[i] ;
+        HDMITX_WriteI2C_Byte(REG_TX_PKT_PB01+i, pInfoFrame->pktbyte.HDR_DB[i]);
+        ucData -= pInfoFrame->pktbyte.HDR_DB[i] ;
     }
-    ucData -= 0x80+HDR_INFOFRAME_VER+HDR_INFOFRAME_TYPE+HDR_INFOFRAME_LEN ;
+    ucData -= 0x80+pInfoFrame->info.Type+pInfoFrame->info.Ver+pInfoFrame->info.Len ;
     HDMITX_WriteI2C_Byte(REG_TX_PKT_PB00, ucData);
 
     Switch_HDMITX_Bank(0) ;
diff --git a/software/sys_controller/it6613/it6613_drv.h b/software/sys_controller/it6613/it6613_drv.h
index 36e297b..ea00c4f 100644
--- a/software/sys_controller/it6613/it6613_drv.h
+++ b/software/sys_controller/it6613/it6613_drv.h
@@ -828,7 +828,7 @@ BOOL CheckHDMITX(BYTE *pHPD,BYTE *pHPDChange) ;
 BOOL EnableHDCP(BYTE bEnable) ;
 BOOL EnableAVIInfoFrame(BYTE bEnable,BYTE *pAVIInfoFrame);
 BOOL EnableAudioInfoFrame(BYTE bEnable,BYTE *pAudioInfoFrame);
-BOOL EnableHDRInfoFrame(BYTE bEnable, BYTE *pHDRInfoFrame);
+BOOL EnableGPInfoFrame(BYTE bEnable, BYTE *pInfoFrame);
 // BOOL EnableVideoOutputIndirect(BYTE xCnt,BYTE inputColorMode,BYTE outputColorMode,BYTE bHDMI) ;
 void SetAVMute(BYTE bEnable) ;
 void SetOutputColorDepthPhase(BYTE ColorDepth,BYTE bPhase) ;
diff --git a/software/sys_controller/it6613/typedef.h b/software/sys_controller/it6613/typedef.h
index 376c6d9..1fed05b 100644
--- a/software/sys_controller/it6613/typedef.h
+++ b/software/sys_controller/it6613/typedef.h
@@ -252,6 +252,33 @@ typedef union _AVI_InfoFrame
     } pktbyte ;
 } AVI_InfoFrame ;
 
+typedef union _Freesync_InfoFrame {
+
+    struct {
+        BYTE Type ;
+        BYTE Ver ;
+        BYTE Len ;
+
+        BYTE Enable ;
+
+        BYTE Rsvd1 ;
+        BYTE Rsvd2 ;
+        BYTE Rsvd3 ;
+        BYTE Rsvd4 ;
+
+        BYTE Mode2 ;
+
+        BYTE min_rate ;
+        BYTE max_rate ;
+    } info ;
+
+    struct {
+        BYTE FS_HB[3] ;
+        BYTE FS_DB[VENDORSPEC_INFOFRAME_LEN] ;
+    } pktbyte ;
+
+} Freesync_InfoFrame ;
+
 typedef union _Audio_InfoFrame {
 
     struct {