diff --git a/amp/src/aal/sound/sound_api.c b/amp/src/aal/sound/sound_api.c
index 7cf0a06..b6799c0 100755
--- a/amp/src/aal/sound/sound_api.c
+++ b/amp/src/aal/sound/sound_api.c
@@ -2950,6 +2950,7 @@ HRESULT AMP_SND_SetStreamVolume(HANDLE hStream, UINT uiVolume)
     SNDSTRM_CHECKVALID(hStream);
     pStream = (SND_STRM*) hStream;
     volume = AMP_SND_VOL_L2E(uiVolume);
+    pStream->uiStreamVolume = uiVolume;
     stAppParam._d = AMP_APP_PARAIDX_VOLUME;
     stAppParam._u.stVolume.uiVolume = volume;
 #ifdef CONFIG_AMP_AUDIO_GAIN_RANGE_EXTENSION
@@ -3485,8 +3486,14 @@ HRESULT AMP_SND_SetStreamMute(AMP_IN HANDLE hStream, AMP_IN BOOL bMute)
     {
 #ifdef CONFIG_AMP_AUDIO_MUTE_PT_FOR_STREAM
         SNDLOGD("HDMI pass through case, stream volume is set to AOUT!\n");
+#if 1 //tony debug
+        SNDLOGE("tony restore volume even for HDMI passthrough ! restore volume target:[%d] \n", pStream->uiStreamVolume);
+        AMP_RPC(rc, AMP_SNDSINK_SetAoutStreamVolume, pStream->hSndSinkComp,
+            HDMI_PATH, bMute? 0: (pStream->uiStreamVolume==0 ? 0:0x40000000L));
+#else
         AMP_RPC(rc, AMP_SNDSINK_SetAoutStreamVolume, pStream->hSndSinkComp,
             HDMI_PATH, bMute? 0: 0x40000000L);
+#endif
         if (rc != SUCCESS) {
             SNDLOGE("Fail to set aout stream volume with handle[0x%x]\n",
                      hStream);