[wdmaudiodev] Re: AW: UAC2 driver loaded but no audio endpoints visible

From: "Tsai Tzung-Dar" <dmarc-noreply@xxxxxxxxxxxxx> ("tdtsai1973")
To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
Date: Fri, 24 Sep 2021 01:52:52 +0000 (UTC)

Hi Johannes:I found something strange in your Audio control descriptor. 1. Why
your clock source do not include "Clock Validity" control? Please reference to
UAC 2.0 spec 5.2.5.1.2.2. Input Terminal 01 should include "Cluster" control
and set "bmChannelConfig" to 0. Please reference to UAC 20 spec. 5.2.5.4.2.
BR,Tzung-Dar Tsai

    在 2021年9月23日星期四下午11:17:22 [GMT+8]， Johannes
Freyberger<jfreyberger@xxxxxxxxxxxxxxxxxxxx> 寫道：

Hi Tsai,

as I already thought this might be a problem in the descriptor which is
generated inside the Linux drivers/usb/gadget/f_uac2.c I already opened an
issue on github where I added the descriptor:



https://github.com/raspberrypi/linux/issues/4587



If you don’t mind you could also post your ideas directly there so we don’t
have to bother this group here as it seems this could really be more a Linux
than a windows problem?



Thanks a lot for your help and best regards,

Johannes



Von: wdmaudiodev-bounce@xxxxxxxxxxxxx Im Auftrag von Tsai Tzung-Dar
("tdtsai1973")
Gesendet: Donnerstag, 23. September 2021 17:05
An: wdmaudiodev@xxxxxxxxxxxxx
Betreff: [wdmaudiodev] Re: AW: UAC2 driver loaded but no audio endpoints visible



Hi Johannes:

Sorry I don't have XMOS device on my hand. If you can post USB Tree View log of
your device, I can help you to check what's wrong with your descriptor.



BR,

Tzung-Dar Tsai



在 2021年9月23日星期四下午08:30:31 [GMT+8]， Johannes
Freyberger<jfreyberger@xxxxxxxxxxxxxxxxxxxx> 寫道：





Hi Tsai,

thanks, that’s great news – thanks a lot. I just bought the second one and now
I’m waiting for the arrival 😊 … do you think it’s possible that you already
send me the output of USB Tree View for this UAC2 device (XMOS 32Bit 384kHz DXD
DSD256 USB to/from I2S, to DSD/reclock SPDIF PCB)?

Best regards,

Johannes

Von: wdmaudiodev-bounce@xxxxxxxxxxxxx Im Auftrag von Tsai Tzung-Dar
("tdtsai1973")
Gesendet: Donnerstag, 23. September 2021 13:52
An: wdmaudiodev@xxxxxxxxxxxxx
Betreff: [wdmaudiodev] Re: AW: UAC2 driver loaded but no audio endpoints visible

Hi Johannes:

USB DAC which use CM6631A or XMOS chips, were all use UAC 2.0 with feedback
endpoint. You can find one in follow url:

384kHz Asynchronous USB to I2S/SPDIF CM6631A PCB - DIYINHK

|
|

|

|

|
|
|  |
384kHz Asynchronous USB to I2S/SPDIF CM6631A PCB - DIYINHK

NDK NZ2520SDA Ultra low phase noise oscillator Uses external 3.3V regulated
power supply PCB with optical spdif ...
|

|

|

https://www.diyinhk.com/shop/audio-kits/170-xmos-32bit-384khz-dxd-dsd256-usb-tofrom-i2sdsdreclock-spdif-pcb.html

UAC1 feedback is work for Windows 10. I suggest use USB Tree View to check you
configuration descriptor first. Maybe you put some AC Unit that MS
usbaudio2.sys do not support.

BR,

Tzung-Dar Tsai

在 2021年9月23日星期四下午06:18:35 [GMT+8]， Johannes
Freyberger<jfreyberger@xxxxxxxxxxxxxxxxxxxx> 寫道：

Hi all,

seems not an easy thing to answer. Meanwhile I asked some audio colleagues to
check their USB audio devices if we can find any device that uses usbaudio2.sys
and a feedback endpoint – but so far they’re all using either UAC1 or native
drivers or no feedback endpoint. And I think we already checked > 20 devices
from various manufacturers. But I found a device which uses a feedback endpoint
and UAC1. Though the feedback endpoint seems something USB specific and not
directly related to UAC1 or UAC2 I think it also would have to be somehow
supported in the audio part and I found different answers whether W10 and UAC1
support a feedback endpoint to adjust the samplerate during a playback from the
PC to the device. Does anybody know whether a feedback endpoint should also
work for UAC1 in W10?

Thanks and best regards,

Johannes

Von: Johannes Freyberger
Gesendet: Dienstag, 21. September 2021 21:04
An: 'wdmaudiodev@xxxxxxxxxxxxx' <wdmaudiodev@xxxxxxxxxxxxx>
Betreff: AW: [wdmaudiodev] Re: AW: UAC2 driver loaded but no audio endpoints
visible

Hi,

as usbaudio2.sys is from 06.12.2019 I thought I’d give the latest TMFs for W10
2004 a chance even if they are not for W10 21H1. And the output seems not so
wrong to me. The feedback endpoint seems to be OK:

00000593             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08               AS Interface List:

00000594             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08               AS OUT Interface IfNb=0x01
'Playback Inactive' Terminal ID=0x01 Type=0x101 USB_STREAMING 'USBH Out'

00000595             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                 *** Alt Setting Group ***

00000596             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                 AS OUT IfNb=0x01
AltSetting=0x01 'Playback Active'

00000597             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                    Format Type I PCM
(0x00000001) SubSlotSize=2 BitsPerSample=16 ChannelCount=2

00000598             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                    Data Endpoint 0x01
Isochronous Asynchronous Data ActualMaxPacketSize=188
ActualPacketFrequency=1000/s (HS Endpoint)

00000599             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                    Feedback Endpoint 0x81
Isochronous None Feedback ActualMaxPacketSize=4 ActualPacketFrequency=1000/s
(HS Endpoint)

00000600             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                    Supported sampling
frequencies:

00000601             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                      min=44100 max=44100 res=0

00000602             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08               AS IN  Interface IfNb=0x02
'Capture Inactive' Terminal ID=0x04 Type=0x101 USB_STREAMING 'USBH In'

00000603             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                 *** Alt Setting Group ***

00000604             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                 AS IN  IfNb=0x02
AltSetting=0x01 'Capture Active'

00000605             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                    Format Type I PCM
(0x00000001) SubSlotSize=2 BitsPerSample=16 ChannelCount=2

00000606             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                    Data Endpoint 0x82
Isochronous Asynchronous Data ActualMaxPacketSize=180
ActualPacketFrequency=1000/s (HS Endpoint)

00000607             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                    Supported sampling
frequencies:

00000608             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08                      min=44100 max=44100 res=0

00000609             USBAudio2         4             17220    4             0
           09\21\2021-19:57:40:08               SUCCESS

But later on I see several of these problems:

00001014             USBAudio2         2820      2948      3             0
        09\21\2021-19:57:40:270             [

00001015             USBAudio2         2820      2948      3             0
        09\21\2021-19:57:40:270             PIN 0 HostPin OutPin

00001016             USBAudio2         2820      2948      3             0
        09\21\2021-19:57:40:270                KSPROPERTY_PIN_PROPOSEDATAFORMAT
SET

00001017             USBAudio2         2820      2948      3             0
        09\21\2021-19:57:40:270             SET: ValueSize=64 <
sizeof(KSDATAFORMAT_WAVEFORMATEX)

00001018             USBAudio2         2820      2948      3             0
        09\21\2021-19:57:40:270             ]
0xc0000023(STATUS_BUFFER_TOO_SMALL)

On the other hand I don’t see how I could have any influence on this in my USB
device definition. Is there anybody who could confirm that he/she got the Linux
uac2 usb audio gadget driver working with W10 usbaudio2.sys version
10.0.19041.1 from 06.12.2019?

Thanks and best regards,

Johannes

Von: Johannes Freyberger
Gesendet: Montag, 20. September 2021 22:31
An: 'wdmaudiodev@xxxxxxxxxxxxx' <wdmaudiodev@xxxxxxxxxxxxx>
Betreff: AW: [wdmaudiodev] Re: AW: UAC2 driver loaded but no audio endpoints
visible

Hi Jerry,

thanks for your reply. I already found your post and I followed the idea using
.bFunctionSubClass = UAC2_FUNCTION_DESKTOP_SPEAKER. So far I didn’t check the
USB_ENDPOINT_SYNC_SYNC as I think this link
https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/usb-2-0-audio-drivers?source=docs
  in combination with USB spec 2.0 chapter 5.12.4.1 suggests that
USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC is correct. Unfortunately I
don’t have any USB device here that uses usbaudio2.sys. Either they have native
drivers or they use usbaudio.sys. Otherwise I could compare the USB Tree View
output from a working device to my Raspberry.

Best,

Johannes

Von: wdmaudiodev-bounce@xxxxxxxxxxxxx Im Auftrag von Jerry Evans
Gesendet: Montag, 20. September 2021 20:28
An: wdmaudiodev@xxxxxxxxxxxxx
Betreff: [wdmaudiodev] Re: AW: UAC2 driver loaded but no audio endpoints visible

Hello Johannes

ICYMI See https://www.freelists.org/post/wdmaudiodev/Linux-UAC2-gadget,1 for ;
some details on a then working UAC2 gadget. This may or may not help with your
particular problem:)

Good luck

Jerry.

Sent from my iPad

On 20 Sep 2021, at 17:46, Johannes Freyberger
<jfreyberger@xxxxxxxxxxxxxxxxxxxx> wrote:

OK … sadly that’s no good news

Currently I think my problem is around this output from KS Topology Filter Test:

Device Name = USB Audio 2.0

PnP ID      = USB\VID_1D6B&PID_0101&MI_00\8&1583D6B2&1&0000

    Device: USB Audio 2.0 (USB\VID_1D6B&PID_0101&MI_00\8&1583D6B2&1&0000)

     Filter: Source/Sink

      Pin[00] ()

      Pin[01] ()

      Pin[02] ()

      Pin[03] ()

     Filter: Source/Sink

      Pin[00] ()

      Pin[00] : Basic support: 0x201

    KSPROPERTY_AUDIOSIGNALPROCESSING_MODES response: KSMULTIPLE_ITEM.Size = 24,
KSMULTIPLE_ITEM.Count = 1, buffer size = 24

    AUDIO_SIGNALPROCESSINGMODE_RAW is mode 0

    Message:Driver supports processing modes but the preferred formats donot
have the attribute flag set, so setting it [hr = E_INVALIDARG (0x80070057)]

    pCPinInstance->CreatePin() succeeded

    Pin creation successful for AUDIO_SIGNALPROCESSINGMODE_RAW

      Pin[01] ()

      Pin[02] ()

      Pin[03] ()

      Pin[03] : Basic support: 0x201

    KSPROPERTY_AUDIOSIGNALPROCESSING_MODES response: KSMULTIPLE_ITEM.Size = 24,
KSMULTIPLE_ITEM.Count = 1, buffer size = 24

    AUDIO_SIGNALPROCESSINGMODE_RAW is mode 0

    Message:Driver supports processing modes but the preferred formats donot
have the attribute flag set, so setting it [hr = E_INVALIDARG (0x80070057)]

    pCPinInstance->CreatePin() failed with 0x9000001f.

      FAIL: Pin[03] : Pin creation failed for AUDIO_SIGNALPROCESSINGMODE_RAW

End Case: ID 16.1007:3.10 : FAIL : KS Topology Filters\KS Pins\Check Processing
Modes : [Mon Sep 20 18:28:33 2021]

But yet I don’t know the relationship from the USB Driver struct to the
processing modes – why does the Linux audio gadget have the support of
processing modes set or in other words what entry in the USB Tree View lets
windows activate the processing modes for this device?

Von: wdmaudiodev-bounce@xxxxxxxxxxxxx Im Auftrag von Matthew van Eerde
("Matthew.van.Eerde")
Gesendet: Montag, 20. September 2021 18:29
An: wdmaudiodev@xxxxxxxxxxxxx
Betreff: [wdmaudiodev] Re: AW: Re: [EXTERNAL] AW: UAC2 driver loaded but no
audio endpoints visible

For various dry and boring technical reasons I find myself unable to update
this blog post with new Windows OSes.

From: wdmaudiodev-bounce@xxxxxxxxxxxxx <wdmaudiodev-bounce@xxxxxxxxxxxxx> On
Behalf Of Johannes Freyberger
Sent: Monday, September 20, 2021 7:52 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] AW: Re: [EXTERNAL] AW: UAC2 driver loaded but no audio
endpoints visible

Yes, thanks … I already found this link today and grabbed the TMF files from
your github page. Do you think it’s possible to also add the ausbaudio2 tmf
files for W10 21H1 there?

Von: wdmaudiodev-bounce@xxxxxxxxxxxxx Im Auftrag von Matthew van Eerde
("Matthew.van.Eerde")
Gesendet: Montag, 20. September 2021 16:44
An: wdmaudiodev@xxxxxxxxxxxxx
Betreff: [wdmaudiodev] Re: [EXTERNAL] AW: UAC2 driver loaded but no audio
endpoints visible

You may be interested in How to gather and read logs for Microsoft’s USB Audio
2.0 class driver – Matthew van Eerde's web log (wordpress.com)

Follow-Ups:
- [wdmaudiodev] AW: Re: AW: UAC2 driver loaded but no audio endpoints visible
  - From: Johannes Freyberger
- [wdmaudiodev] AW: Re: AW: UAC2 driver loaded but no audio endpoints visible
  - From: Johannes Freyberger

References:
- [wdmaudiodev] AW: UAC2 driver loaded but no audio endpoints visible
  - From: Johannes Freyberger

[wdmaudiodev] Re: AW: UAC2 driver loaded but no audio endpoints visible

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