sound/hd-audio/controls.rst

2 HD-Audio Codec-Specific Mixer Controls
6 This file explains the codec-specific mixer controls.
9 --------------
12   This is an enum control to change the surround-channel setup,
16   jack-retasking of multi-I/O jacks.
18 Auto-Mute Mode
19   This is an enum control to change the auto-mute behavior of the
20   headphone and line-out jacks.  If built-in speakers and headphone
21   and/or line-out jacks are available on a machine, this controls
23   When there are only either headphones or line-out jacks, it gives
27   When both headphone and line-out jacks are present, it gives
28   "Disabled", "Speaker Only" and "Line-Out+Speaker".  When
29   speaker-only is chosen, plugging into a headphone or a line-out jack
30   mutes the speakers, but not line-outs.  When line-out+speaker is
32   line-outs.
36 -------------------
39   This control enables/disables the analog-loopback circuit.  This
41   (see HD-Audio.txt).  Note that on some codecs the analog-loopback
50 Headphone as Line Out
51   When this control is ON, treat the headphone jacks as line-out
52   jacks.  That is, the headphone won't auto-mute the other line-outs,
53   and no HP-amp is set to the pins.
55 Mic Jack Mode, Line Jack Mode, etc
57   pins.  Depending on the jack type, it can set as "Mic In" and "Line
58   In", for determining the input bias, or it can be set to "Line Out"
59   when the pin is a multi-I/O jack for surround channels.
63 ----------
66   An enum control to re-task the multi-I/O jacks for surround outputs.
67   When it's ON, the corresponding input jacks (usually a line-in and a
68   mic-in) are switched as the surround and the CLFE output jacks.
74   side or a CLFE-channel DAC, the DAC is switched to the headphone
78   An enum control to determine whether the analog-loopback route is
79   enabled or not.  When it's enabled, the analog-loopback is mixed to
80   the front-channel.  Also, the same route is used for the headphone
81   and speaker outputs.  As a side-effect, when this mode is set, the
86 Dynamic Power-Control
87   This control determines whether the dynamic power-control per jack
91   doesn't provide a proper jack-detection, this won't work; in such a
97   the jack detection so that the headphone auto-mute can work, while
102 ---------------
104 Auto-Mute Mode
109 --------------
112   This is an enum control to change the surround-channel setup,
116   jack-retasking of multi-I/O jacks.