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ALSA: hda: mic: add initial support for driver source auto-switching
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Use boost volume controls to detect this case.

Link: https://github.com/alsa-project/alsa-ucm-conf/pull/792
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2026-07-01 16:41:23 +02:00
commit c17dfb63ae
1 changed files with 58 additions and 25 deletions
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47
ucm2/HDA/HiFi-mic.conf
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@ -6,14 +6,16 @@
# Microphone related variables as used internally
# HDA codecs can offer input source selection (mux) via "Input Source" or
# "Capture Source" with varying options:
# 'Internal Mic'
# 'Headset Mic'
# 'Headphone Mic'
# 'Mic'
# "Capture Source" with varying options '[PREFIX ]Mic' where PREFIX is
# <Empty>,Internal,Headset,Headphone.
#
# or there can be 'Mic' and optional 'Front Mic' available
#
# There is also third variant - driver supports auto-switching. In
# this case, the '[Prefix ]Mic Boost Volume' controls exists. There are also
# phantom jacks exported by the driver in this case, but it's not
# necessary to use them. Prefixes: <Empty>,Internal,Front
#
# This leads to up to maximum of four possible input devices.
Define.SourceControl ""
@ -162,7 +164,7 @@ DefineMacro.HDAMicSwitch.SectionDevice."${var:__DevName}" {
CaptureVolume "${var:__Name} Volume"
CaptureSwitch "${var:__Name} Switch"
CaptureMasterElem "${var:__Name} Boost"
JackControl "${var:__Jack}"
JackControl "${var:-__Jack}"
}
}
@ -202,7 +204,12 @@ If.micsetup {
Jack "${var:MicHSJackControl}"
}
}
True {
True.If.autoswitch {
Condition {
Type ControlExists
Control "name='Internal Mic Boost Volume'"
}
False {
# the input selection is via switches, the possible types are
# Mic and Front Mic
Macro.mic.HDAMicSwitch {
@ -226,4 +233,30 @@ If.micsetup {
}
}
}
True {
# third variant - the driver does auto-switching
# note that we should assign right Jack controls to
# allow expose the boost volume
Macro.mic.HDAMicSwitch {
DevName "Mic:hda-int"
Comment "Internal Stereo Microphone"
Name "Internal Mic"
Priority 100
}
If.mic {
# external microphone
Condition {
Type ControlExists
Control "name='Mic Boost Volume'"
}
True.Macro.mic.HDAMicSwitch {
DevName "Mic:hda"
Comment "Stereo Microphone"
Name "Mic"
Priority 200
Jack "${var:MicJackControl}"
}
}
}
}
}