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authorRaymond Yau <superquad.vortex2@gmail.com>2011-10-04 09:46:44 +0800
committerTakashi Iwai <tiwai@suse.de>2011-10-04 07:26:59 +0200
commitce662bb205abdb2545252bce5a0ba11070c29305 (patch)
treecfad9c907a7b8f48fc6024b034750e5d213b5800 /Documentation/sound/alsa
parenteb335a40ca050328f30db28ae4ce63cb07466d22 (diff)
ALSA: hda - Add documentation for codec specific mixer controls of Analog codecs
* Channel Mode This is an enum control to change the surround-channel setup, appears only when the surround channels are available. It gives the number of channels to be used, "2ch", "4ch" abd "6ch". According to the configuration, this also controls the jack-retasking of multi-I/O jacks. * Independent HP When this enum control is enabled, the headphone output is routed from an individual stream (the third PCM such as hw:0,2) instead of the primary stream. Signed-off-by: Raymond Yau <superquad.vortex2@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/sound/alsa')
-rw-r--r--Documentation/sound/alsa/HD-Audio-Controls.txt16
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/HD-Audio-Controls.txt b/Documentation/sound/alsa/HD-Audio-Controls.txt
index 1482035243e..e9621e349e1 100644
--- a/Documentation/sound/alsa/HD-Audio-Controls.txt
+++ b/Documentation/sound/alsa/HD-Audio-Controls.txt
@@ -98,3 +98,19 @@ Conexant codecs
* Auto-Mute Mode
See Reatek codecs.
+
+
+Analog codecs
+--------------
+
+* Channel Mode
+ This is an enum control to change the surround-channel setup,
+ appears only when the surround channels are available.
+ It gives the number of channels to be used, "2ch", "4ch" and "6ch".
+ According to the configuration, this also controls the
+ jack-retasking of multi-I/O jacks.
+
+* Independent HP
+ When this enum control is enabled, the headphone output is routed
+ from an individual stream (the third PCM such as hw:0,2) instead of
+ the primary stream.