[alsa-devel] HDA Intel ALC889A optical optical spdif in
Takashi Iwai
tiwai at suse.de
Fri Apr 21 20:01:56 CEST 2017
On Fri, 21 Apr 2017 19:22:16 +0200,
René Rebe wrote:
>
> On Apr 21, 2017, at 18:37, René Rebe <rene at exactcode.de> wrote:
>
> > Hello again,
> >
> > so I checked the MacBook schematics and it looks like the optical input should be directly connected to pin 47 (GPIO3/SPDIFIN)
> >
> > Maybe EAPD get’s accidentally / wrongly enabled? - Maybe someone can point me how to double check this in ALSA?
>
> I the meantime I finally figured out how this debug verb setting should work via:
>
> # hda-verb /dev/snd/hwC0D0 0x14 0x70C 0
> nid = 0x14, verb = 0x70c, param = 0x0
> value = 0x0
> # hda-verb /dev/snd/hwC0D0 0x15 0x70C 0
> nid = 0x15, verb = 0x70c, param = 0x0
> value = 0x0
>
> which made no difference either, and the ALC889 spec reads “when pin
> widget SPDIF-IN is not connected via the programming configuration
> register.”
>
> Could that be a missing bit?
>
> Any pointer or verbs I should poke welcome :-/
Well, from the codec POV, the SPDIF in is straightly connected from
the pin to the audio in widget, so there should be no special thing
there. The possibly missing setup is the vendor-specific things, and
Apple has been implementing the stuff always in a wild manner,
e.g. doing via VREF, GPIO or whatever.
Takashi
>
> René
>
> > For the record - I try to record:
> > # arecord -D iec958 -f dat -c 2 > rec.wav
> > Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
> >
> > but only get zeros:
> >
> > # hexdump rec.wav
> > 0000000 4952 4646 0024 8000 4157 4556 6d66 2074
> > 0000010 0010 0000 0001 0002 bb80 0000 ee00 0002
> > 0000020 0004 0010 6164 6174 0000 8000 0000 0000
> > 0000030 0000 0000 0000 0000 0000 0000 0000 0000
> > *
> > 0304020 0000 0000 0000 0000 0000 0000
> > 030402c
> >
> > As far as I can see the right sub-device is running:
> >
> > # cat /proc/asound/card0/pcm1c/info
> > card: 0
> > device: 1
> > subdevice: 0
> > stream: CAPTURE
> > id: ALC889A Digital
> > name: ALC889A Digital
> > subname: subdevice #0
> > class: 0
> > subclass: 0
> > subdevices_count: 1
> > subdevices_avail: 0
> > bash-4.2# cat /proc/asound/card0/pcm1c/sub0/status
> > state: RUNNING
> > owner_pid : 25617
> > trigger_time: 2735.340360836
> > tstamp : 0.000000000
> > delay : 3415
> > avail : 3415
> > avail_max : 4095
> > -----
> > hw_ptr : 2047320
> > appl_ptr : 2043905
> >
> >
> > # cat /proc/asound/card0/codec#0
> > Codec: Realtek ALC889A
> > Address: 0
> > AFG Function Id: 0x1 (unsol 1)
> > Vendor Id: 0x10ec0885
> > Subsystem Id: 0x106b2c00
> > Revision Id: 0x100103
> > No Modem Function Group found
> > Default PCM:
> > rates [0x560]: 44100 48000 96000 192000
> > bits [0xe]: 16 20 24
> > formats [0x1]: PCM
> > Default Amp-In caps: N/A
> > Default Amp-Out caps: N/A
> > State of AFG node 0x01:
> > Power states: D0 D1 D2 D3
> > Power: setting=D0, actual=D0
> > GPIO: io=2, o=0, i=0, unsolicited=1, wake=0
> > IO[0]: enable=1, dir=1, wake=0, sticky=0, data=1, unsol=0
> > IO[1]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
> > Node 0x02 [Audio Output] wcaps 0x11: Stereo
> > Device: name="ALC889A Analog", type="Audio", device=0
> > Converter: stream=0, channel=0
> > PCM:
> > rates [0x560]: 44100 48000 96000 192000
> > bits [0xe]: 16 20 24
> > formats [0x1]: PCM
> > Node 0x03 [Audio Output] wcaps 0x11: Stereo
> > Converter: stream=0, channel=0
> > PCM:
> > rates [0x560]: 44100 48000 96000 192000
> > bits [0xe]: 16 20 24
> > formats [0x1]: PCM
> > Node 0x04 [Audio Output] wcaps 0x11: Stereo
> > Converter: stream=0, channel=0
> > PCM:
> > rates [0x560]: 44100 48000 96000 192000
> > bits [0xe]: 16 20 24
> > formats [0x1]: PCM
> > Node 0x05 [Audio Output] wcaps 0x11: Stereo
> > Converter: stream=0, channel=0
> > PCM:
> > rates [0x560]: 44100 48000 96000 192000
> > bits [0xe]: 16 20 24
> > formats [0x1]: PCM
> > Node 0x06 [Audio Output] wcaps 0x211: Stereo Digital
> > Control: name="IEC958 Playback Con Mask", index=0, device=0
> > Control: name="IEC958 Playback Pro Mask", index=0, device=0
> > Control: name="IEC958 Playback Default", index=0, device=0
> > Control: name="IEC958 Playback Switch", index=0, device=0
> > Control: name="IEC958 Default PCM Playback Switch", index=0, device=0
> > Device: name="ALC889A Digital", type="SPDIF", device=1
> > Converter: stream=0, channel=0
> > Digital: Enabled
> > Digital category: 0x0
> > IEC Coding Type: 0x0
> > PCM:
> > rates [0x5e0]: 44100 48000 88200 96000 192000
> > bits [0x1e]: 16 20 24 32
> > formats [0x1]: PCM
> > Node 0x07 [Audio Input] wcaps 0x10011b: Stereo Amp-In
> > Control: name="Capture Volume", index=0, device=0
> > ControlAmp: chs=3, dir=In, idx=0, ofs=0
> > Control: name="Capture Switch", index=0, device=0
> > ControlAmp: chs=3, dir=In, idx=0, ofs=0
> > Device: name="ALC889A Analog", type="Audio", device=0
> > Amp-In caps: ofs=0x10, nsteps=0x2e, stepsize=0x03, mute=1
> > Amp-In vals: [0x10 0x10]
> > Converter: stream=0, channel=0
> > SDI-Select: 0
> > PCM:
> > rates [0x560]: 44100 48000 96000 192000
> > bits [0xe]: 16 20 24
> > formats [0x1]: PCM
> > Connection: 1
> > 0x24
> > Node 0x08 [Audio Input] wcaps 0x10011b: Stereo Amp-In
> > Control: name="Capture Volume", index=1, device=0
> > ControlAmp: chs=3, dir=In, idx=0, ofs=0
> > Control: name="Capture Switch", index=1, device=0
> > ControlAmp: chs=3, dir=In, idx=0, ofs=0
> > Device: name="ALC889A Alt Analog", type="Audio", device=2
> > Amp-In caps: ofs=0x10, nsteps=0x2e, stepsize=0x03, mute=1
> > Amp-In vals: [0x90 0x90]
> > Converter: stream=0, channel=0
> > SDI-Select: 0
> > PCM:
> > rates [0x560]: 44100 48000 96000 192000
> > bits [0xe]: 16 20 24
> > formats [0x1]: PCM
> > Connection: 1
> > 0x23
> > Node 0x09 [Audio Input] wcaps 0x10011b: Stereo Amp-In
> > Control: name="Capture Volume", index=2, device=0
> > ControlAmp: chs=3, dir=In, idx=0, ofs=0
> > Control: name="Capture Switch", index=2, device=0
> > ControlAmp: chs=3, dir=In, idx=0, ofs=0
> > Amp-In caps: ofs=0x10, nsteps=0x2e, stepsize=0x03, mute=1
> > Amp-In vals: [0x90 0x90]
> > Converter: stream=0, channel=0
> > SDI-Select: 0
> > PCM:
> > rates [0x560]: 44100 48000 96000 192000
> > bits [0xe]: 16 20 24
> > formats [0x1]: PCM
> > Connection: 1
> > 0x22
> > Node 0x0a [Audio Input] wcaps 0x100391: Stereo Digital
> > Control: name="IEC958 Capture Switch", index=0, device=0
> > Control: name="IEC958 Capture Default", index=0, device=0
> > Device: name="ALC889A Digital", type="SPDIF", device=1
> > Converter: stream=1, channel=0
> > SDI-Select: 0
> > Digital: Enabled
> > Digital category: 0x0
> > IEC Coding Type: 0x0
> > PCM:
> > rates [0x560]: 44100 48000 96000 192000
> > bits [0x1e]: 16 20 24 32
> > formats [0x1]: PCM
> > Unsolicited: tag=00, enabled=0
> > Connection: 1
> > 0x1f
> > Node 0x0b [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
> > Control: name="Mic Playback Volume", index=0, device=0
> > ControlAmp: chs=3, dir=In, idx=0, ofs=0
> > Control: name="Mic Playback Switch", index=0, device=0
> > ControlAmp: chs=3, dir=In, idx=0, ofs=0
> > Control: name="Line Playback Volume", index=0, device=0
> > ControlAmp: chs=3, dir=In, idx=2, ofs=0
> > Control: name="Line Playback Switch", index=0, device=0
> > ControlAmp: chs=3, dir=In, idx=2, ofs=0
> > Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
> > Amp-In vals: [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
> > Connection: 10
> > 0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17
> > Node 0x0c [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
> > Control: name="Headphone Playback Volume", index=0, device=0
> > ControlAmp: chs=3, dir=Out, idx=0, ofs=0
> > Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-In vals: [0x00 0x00] [0x80 0x80]
> > Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
> > Amp-Out vals: [0x34 0x34]
> > Connection: 2
> > 0x02 0x0b
> > Node 0x0d [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
> > Control: name="Speaker Playback Volume", index=0, device=0
> > ControlAmp: chs=3, dir=Out, idx=0, ofs=0
> > Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-In vals: [0x00 0x00] [0x80 0x80]
> > Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
> > Amp-Out vals: [0x34 0x34]
> > Connection: 2
> > 0x03 0x0b
> > Node 0x0e [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
> > Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-In vals: [0x00 0x00] [0x80 0x80]
> > Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
> > Amp-Out vals: [0x40 0x40]
> > Connection: 2
> > 0x04 0x0b
> > Node 0x0f [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
> > Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-In vals: [0x00 0x00] [0x80 0x80]
> > Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
> > Amp-Out vals: [0x40 0x40]
> > Connection: 2
> > 0x05 0x0b
> > Node 0x10 [Vendor Defined Widget] wcaps 0xf00000: Mono
> > Node 0x11 [Vendor Defined Widget] wcaps 0xf00000: Mono
> > Node 0x12 [Vendor Defined Widget] wcaps 0xf00000: Mono
> > Node 0x13 [Vendor Defined Widget] wcaps 0xf00000: Mono
> > Node 0x14 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
> > Control: name="Speaker Playback Switch", index=0, device=0
> > ControlAmp: chs=3, dir=Out, idx=0, ofs=0
> > Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
> > Amp-In vals: [0x00 0x00]
> > Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-Out vals: [0x00 0x00]
> > Pincap 0x0000373c: IN OUT HP Detect
> > Vref caps: HIZ 50 GRD 80 100
> > Pin Default 0x90100140: [Fixed] Speaker at Int N/A
> > Conn = Unknown, Color = Unknown
> > DefAssociation = 0x4, Sequence = 0x0
> > Misc = NO_PRESENCE
> > Pin-ctls: 0x40: OUT VREF_HIZ
> > Unsolicited: tag=00, enabled=0
> > Connection: 5
> > 0x0c 0x0d* 0x0e 0x0f 0x26
> > Node 0x15 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
> > Control: name="Headphone Playback Switch", index=0, device=0
> > ControlAmp: chs=3, dir=Out, idx=0, ofs=0
> > Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
> > Amp-In vals: [0x00 0x00]
> > Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-Out vals: [0x00 0x00]
> > Pincap 0x0000373c: IN OUT HP Detect
> > Vref caps: HIZ 50 GRD 80 100
> > Pin Default 0x012b4050: [Jack] HP Out at Ext Rear
> > Conn = Comb, Color = Green
> > DefAssociation = 0x5, Sequence = 0x0
> > Pin-ctls: 0xc4: OUT HP VREF_80
> > Unsolicited: tag=01, enabled=1
> > Connection: 5
> > 0x0c* 0x0d 0x0e 0x0f 0x26
> > Node 0x16 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
> > Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
> > Amp-In vals: [0x00 0x00]
> > Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-Out vals: [0x80 0x80]
> > Pincap 0x0000003c: IN OUT HP Detect
> > Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
> > Conn = Unknown, Color = Unknown
> > DefAssociation = 0xf, Sequence = 0x0
> > Pin-ctls: 0x20: IN
> > Unsolicited: tag=00, enabled=0
> > Connection: 5
> > 0x0c 0x0d 0x0e* 0x0f 0x26
> > Node 0x17 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
> > Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
> > Amp-In vals: [0x00 0x00]
> > Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-Out vals: [0x80 0x80]
> > Pincap 0x0000003c: IN OUT HP Detect
> > Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
> > Conn = Unknown, Color = Unknown
> > DefAssociation = 0xf, Sequence = 0x0
> > Pin-ctls: 0x20: IN
> > Unsolicited: tag=00, enabled=0
> > Connection: 5
> > 0x0c 0x0d 0x0e 0x0f* 0x26
> > Node 0x18 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
> > Control: name="Mic Boost Volume", index=0, device=0
> > ControlAmp: chs=3, dir=In, idx=0, ofs=0
> > Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
> > Amp-In vals: [0x00 0x00]
> > Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-Out vals: [0x80 0x80]
> > Pincap 0x0000373c: IN OUT HP Detect
> > Vref caps: HIZ 50 GRD 80 100
> > Pin Default 0x90a00110: [Fixed] Mic at Int N/A
> > Conn = Unknown, Color = Unknown
> > DefAssociation = 0x1, Sequence = 0x0
> > Misc = NO_PRESENCE
> > Pin-ctls: 0x24: IN VREF_80
> > Unsolicited: tag=00, enabled=0
> > Connection: 5
> > 0x0c* 0x0d 0x0e 0x0f 0x26
> > Node 0x19 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
> > Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
> > Amp-In vals: [0x00 0x00]
> > Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-Out vals: [0x80 0x80]
> > Pincap 0x0000373c: IN OUT HP Detect
> > Vref caps: HIZ 50 GRD 80 100
> > Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
> > Conn = Unknown, Color = Unknown
> > DefAssociation = 0xf, Sequence = 0x0
> > Pin-ctls: 0x20: IN VREF_HIZ
> > Unsolicited: tag=00, enabled=0
> > Connection: 5
> > 0x0c* 0x0d 0x0e 0x0f 0x26
> > Node 0x1a [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
> > Control: name="Line Boost Volume", index=0, device=0
> > ControlAmp: chs=3, dir=In, idx=0, ofs=0
> > Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
> > Amp-In vals: [0x00 0x00]
> > Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-Out vals: [0x80 0x80]
> > Pincap 0x0000373c: IN OUT HP Detect
> > Vref caps: HIZ 50 GRD 80 100
> > Pin Default 0x018b3020: [Jack] Line In at Ext Rear
> > Conn = Comb, Color = Blue
> > DefAssociation = 0x2, Sequence = 0x0
> > Pin-ctls: 0x20: IN VREF_HIZ
> > Unsolicited: tag=03, enabled=1
> > Connection: 5
> > 0x0c* 0x0d 0x0e 0x0f 0x26
> > Node 0x1b [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
> > Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
> > Amp-In vals: [0x00 0x00]
> > Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-Out vals: [0x80 0x80]
> > Pincap 0x0000373c: IN OUT HP Detect
> > Vref caps: HIZ 50 GRD 80 100
> > Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
> > Conn = Unknown, Color = Unknown
> > DefAssociation = 0xf, Sequence = 0x0
> > Pin-ctls: 0x20: IN VREF_HIZ
> > Unsolicited: tag=00, enabled=0
> > Connection: 5
> > 0x0c* 0x0d 0x0e 0x0f 0x26
> > Node 0x1c [Pin Complex] wcaps 0x400001: Stereo
> > Pincap 0x00000020: IN
> > Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
> > Conn = Unknown, Color = Unknown
> > DefAssociation = 0xf, Sequence = 0x0
> > Pin-ctls: 0x20: IN
> > Node 0x1d [Pin Complex] wcaps 0x400000: Mono
> > Pincap 0x00000020: IN
> > Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
> > Conn = Unknown, Color = Unknown
> > DefAssociation = 0xf, Sequence = 0x0
> > Pin-ctls: 0x20: IN
> > Node 0x1e [Pin Complex] wcaps 0x400300: Mono Digital
> > Pincap 0x00000010: OUT
> > Pin Default 0x014be060: [Jack] SPDIF Out at Ext Rear
> > Conn = Comb, Color = White
> > DefAssociation = 0x6, Sequence = 0x0
> > Pin-ctls: 0x40: OUT
> > Connection: 1
> > 0x06
> > Node 0x1f [Pin Complex] wcaps 0x400200: Mono Digital
> > Pincap 0x00000020: IN
> > Pin Default 0x01cbe030: [Jack] SPDIF In at Ext Rear
> > Conn = Comb, Color = White
> > DefAssociation = 0x3, Sequence = 0x0
> > Pin-ctls: 0x20: IN
> > Node 0x20 [Vendor Defined Widget] wcaps 0xf00040: Mono
> > Processing caps: benign=0, ncoeff=17
> > Node 0x21 [Volume Knob Widget] wcaps 0x600080: Mono
> > Volume-Knob: delta=0, steps=32, direct=0, val=63
> > Unsolicited: tag=00, enabled=0
> > Connection: 0
> > Node 0x22 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
> > Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-In vals: [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
> > Connection: 11
> > 0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17 0x0b
> > Node 0x23 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
> > Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-In vals: [0x80 0x80] [0x80 0x80] [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
> > Connection: 11
> > 0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17 0x0b
> > Node 0x24 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
> > Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-In vals: [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
> > Connection: 11
> > 0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17 0x0b
> > Node 0x25 [Audio Output] wcaps 0x11: Stereo
> > Converter: stream=0, channel=0
> > PCM:
> > rates [0x560]: 44100 48000 96000 192000
> > bits [0xe]: 16 20 24
> > formats [0x1]: PCM
> > Node 0x26 [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
> > Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> > Amp-In vals: [0x00 0x00] [0x80 0x80]
> > Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
> > Amp-Out vals: [0x40 0x40]
> > Connection: 2
> > 0x25 0x0b
> >
> > On Apr 5, 2017, at 0:02, René Rebe <rene at exactcode.de> wrote:
> >
> >> Hi,
> >>
> >> recently I wanted to connect my low noise mic pre-amp via optical spdif to a spare "10 year” old MacBook or MacBookPro.
> >> Those indeed have a optical input in the 3.5mm headphone jack. On macOS this also works and works as expected.
> >>
> >> On Linux, however, no matter what I do I only get zeros when recording the -D iec958.
> >>
> >> In /proc I see 3 capture sub-devices, where the 2nd is labeled:
> >>
> >> # cat /proc/asound/card0/pcm1c/info
> >> ...
> >> id: ALC889A Digital
> >> name: ALC889A Digital
> >> ...
> >>
> >> The behavior is the same on booth the MacBook as well as the MacBook Pro with either of those PCI devices:
> >>
> >> 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
> >> 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
> >>
> >> I have the feeling there could be some auto sensing be involved, as in the macOS system preferences I see the input switching from Mic to Optical Input as soon as I plugin in an active fibre.
> >>
> >> As I’m not familiar with this Intel HD stuff, any hint how to start analyzing and poking this mystery would be highly appreciated.
> >>
> >> Best regards,
> >> René
> >>
> >> --
> >> ExactCODE GmbH, Lietzenburger Str. 42, DE-10789 Berlin
> >> http://exactcode.com | http://exactscan.com | http://ocrkit.com | http://t2-project.org | http://rene.rebe.de
> >> _______________________________________________
> >> Alsa-devel mailing list
> >> Alsa-devel at alsa-project.org
> >> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> >
> > --
> > ExactCODE GmbH, Lietzenburger Str. 42, DE-10789 Berlin
> > http://exactcode.com | http://exactscan.com | http://ocrkit.com | http://t2-project.org | http://rene.rebe.de
> >
> > _______________________________________________
> > Alsa-devel mailing list
> > Alsa-devel at alsa-project.org
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
> --
> ExactCODE GmbH, Lietzenburger Str. 42, DE-10789 Berlin
> http://exactcode.com | http://exactscan.com | http://ocrkit.com | http://t2-project.org | http://rene.rebe.de
>
> _______________________________________________
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> Alsa-devel at alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
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