Merge remote-tracking branch 'remotes/kraxel/tags/audio-20191106-pull-request' into staging

audio: documentation update

# gpg: Signature made Wed 06 Nov 2019 08:24:44 GMT
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/audio-20191106-pull-request:
  audio: add -audiodev pa,in|out.latency= to documentation
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

qemu-options.hx

@@ -471,6 +471,7 @@ DEF("audiodev", HAS_ARG, QEMU_OPTION_audiodev,
     "-audiodev pa,id=id[,prop[=value][,...]]\n"
     "                server= PulseAudio server address\n"
     "                in|out.name= source/sink device name\n"
+    "                in|out.latency= desired latency in microseconds\n"
 #endif
 #ifdef CONFIG_AUDIO_SDL
     "-audiodev sdl,id=id[,prop[=value][,...]]\n"
@@ -645,6 +646,10 @@ Sets the PulseAudio @var{server} to connect to.
 @item in|out.name=@var{sink}
 Use the specified source/sink for recording/playback.
 
+@item in|out.latency=@var{usecs}
+Desired latency in microseconds.  The PulseAudio server will try to honor this
+value but actual latencies may be lower or higher.
+
 @end table
 
 @item -audiodev sdl,id=@var{id}[,@var{prop}[=@var{value}][,...]]