Index: /trunk/src/VBox/Devices/Audio/DevHDA.cpp
===================================================================
--- /trunk/src/VBox/Devices/Audio/DevHDA.cpp	(revision 65141)
+++ /trunk/src/VBox/Devices/Audio/DevHDA.cpp	(revision 65142)
@@ -1828,4 +1828,10 @@
 }
 
+/**
+ * Resets an HDA stream.
+ *
+ * @param   pThis               HDA state.
+ * @param   pStream             HDA stream to reset.
+ */
 static void hdaStreamReset(PHDASTATE pThis, PHDASTREAM pStream)
 {
@@ -1880,4 +1886,12 @@
 }
 
+/**
+ * Enables or disables an HDA audio stream.
+ *
+ * @returns IPRT status code.
+ * @param   pThis               HDA state.
+ * @param   pStream             HDA stream to enable or disable.
+ * @param   fEnable             Whether to enable or disble the stream.
+ */
 static int hdaStreamEnable(PHDASTATE pThis, PHDASTREAM pStream, bool fEnable)
 {
@@ -3857,5 +3871,5 @@
 
 /**
- * Stops the internal audio device timer (if not stopped yet).
+ * Stops the internal audio device timer.
  *
  * @param   pThis               HDA state.
@@ -3869,4 +3883,11 @@
 }
 
+/**
+ * Decreases the active HDA streams count by one and
+ * then checks if the internal audio device timer can be
+ * stopped.
+ *
+ * @param   pThis               HDA state.
+ */
 static void hdaTimerMaybeStop(PHDASTATE pThis)
 {