diff mbox series

ALSA: usb-audio: allow -EPIPE errors for some v2 messages

Message ID YWLbEdHUE3k/i0fe@kroah.com (mailing list archive)
State New, archived
Headers show
Series ALSA: usb-audio: allow -EPIPE errors for some v2 messages | expand

Commit Message

Greg Kroah-Hartman Oct. 10, 2021, 12:22 p.m. UTC
The Schiit Hel device does not like to respond to all get_ctl_value_v2()
requests for some reason.  This used to work in older kernels, but now
with more strict checking, this failure causes the device to fail to
work.

Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

This fixes the Shiit Hel device that I have.  It used to work on older
kernels (a year ago?), but stopped working for some reason and I didn't
take the time to track it down.  This change fixes the issue for me, but
feels wrong for some reason.  At least now I can use the device as a
headphone driver, much better than the built-in one for my current
machine...

If needed, I can take the time to do bisection to track down the real
issue here, it might be due to stricter endpoint checking in the USB
core, but that feels wrong somehow.

Here's the debugfs USB output for this device, showing the endpoints:

T:  Bus=07 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#=  5 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=30be ProdID=0101 Rev=01.02
S:  Manufacturer=Schiit Audio
S:  Product=Schiit Hel
C:  #Ifs= 4 Cfg#= 1 Atr=c0 MxPwr=0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=01(audio) Sub=01 Prot=20 Driver=snd-usb-audio
E:  Ad=8f(I) Atr=03(Int.) MxPS=   6 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
E:  Ad=05(O) Atr=05(Isoc) MxPS= 104 Ivl=125us
E:  Ad=85(I) Atr=11(Isoc) MxPS=   4 Ivl=1ms
I:  If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
E:  Ad=88(I) Atr=05(Isoc) MxPS= 156 Ivl=125us
I:  If#= 3 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=84(I) Atr=03(Int.) MxPS=  16 Ivl=1ms

Any other suggestions to fix this are welcome.

 sound/usb/mixer.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Takashi Iwai Oct. 10, 2021, 8:25 p.m. UTC | #1
On Sun, 10 Oct 2021 14:22:41 +0200,
Greg Kroah-Hartman wrote:
> 
> The Schiit Hel device does not like to respond to all get_ctl_value_v2()
> requests for some reason.  This used to work in older kernels, but now
> with more strict checking, this failure causes the device to fail to
> work.
> 
> Cc: Jaroslav Kysela <perex@perex.cz>
> Cc: Takashi Iwai <tiwai@suse.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
> 
> This fixes the Shiit Hel device that I have.  It used to work on older
> kernels (a year ago?), but stopped working for some reason and I didn't
> take the time to track it down.  This change fixes the issue for me, but
> feels wrong for some reason.  At least now I can use the device as a
> headphone driver, much better than the built-in one for my current
> machine...
> 
> If needed, I can take the time to do bisection to track down the real
> issue here, it might be due to stricter endpoint checking in the USB
> core, but that feels wrong somehow.
> 
> Here's the debugfs USB output for this device, showing the endpoints:
> 
> T:  Bus=07 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#=  5 Spd=480 MxCh= 0
> D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
> P:  Vendor=30be ProdID=0101 Rev=01.02
> S:  Manufacturer=Schiit Audio
> S:  Product=Schiit Hel
> C:  #Ifs= 4 Cfg#= 1 Atr=c0 MxPwr=0mA
> I:  If#= 0 Alt= 0 #EPs= 1 Cls=01(audio) Sub=01 Prot=20 Driver=snd-usb-audio
> E:  Ad=8f(I) Atr=03(Int.) MxPS=   6 Ivl=1ms
> I:  If#= 1 Alt= 1 #EPs= 2 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
> E:  Ad=05(O) Atr=05(Isoc) MxPS= 104 Ivl=125us
> E:  Ad=85(I) Atr=11(Isoc) MxPS=   4 Ivl=1ms
> I:  If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
> E:  Ad=88(I) Atr=05(Isoc) MxPS= 156 Ivl=125us
> I:  If#= 3 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
> E:  Ad=84(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
> 
> Any other suggestions to fix this are welcome.

Could you show the exact error messages and lsusb -v output?
We may paper over only the problematic node instead.


thanks,

Takashi
Greg Kroah-Hartman Oct. 11, 2021, 3:28 p.m. UTC | #2
On Sun, Oct 10, 2021 at 10:25:09PM +0200, Takashi Iwai wrote:
> On Sun, 10 Oct 2021 14:22:41 +0200,
> Greg Kroah-Hartman wrote:
> > 
> > The Schiit Hel device does not like to respond to all get_ctl_value_v2()
> > requests for some reason.  This used to work in older kernels, but now
> > with more strict checking, this failure causes the device to fail to
> > work.
> > 
> > Cc: Jaroslav Kysela <perex@perex.cz>
> > Cc: Takashi Iwai <tiwai@suse.com>
> > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > ---
> > 
> > This fixes the Shiit Hel device that I have.  It used to work on older
> > kernels (a year ago?), but stopped working for some reason and I didn't
> > take the time to track it down.  This change fixes the issue for me, but
> > feels wrong for some reason.  At least now I can use the device as a
> > headphone driver, much better than the built-in one for my current
> > machine...
> > 
> > If needed, I can take the time to do bisection to track down the real
> > issue here, it might be due to stricter endpoint checking in the USB
> > core, but that feels wrong somehow.
> > 
> > Here's the debugfs USB output for this device, showing the endpoints:
> > 
> > T:  Bus=07 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#=  5 Spd=480 MxCh= 0
> > D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
> > P:  Vendor=30be ProdID=0101 Rev=01.02
> > S:  Manufacturer=Schiit Audio
> > S:  Product=Schiit Hel
> > C:  #Ifs= 4 Cfg#= 1 Atr=c0 MxPwr=0mA
> > I:  If#= 0 Alt= 0 #EPs= 1 Cls=01(audio) Sub=01 Prot=20 Driver=snd-usb-audio
> > E:  Ad=8f(I) Atr=03(Int.) MxPS=   6 Ivl=1ms
> > I:  If#= 1 Alt= 1 #EPs= 2 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
> > E:  Ad=05(O) Atr=05(Isoc) MxPS= 104 Ivl=125us
> > E:  Ad=85(I) Atr=11(Isoc) MxPS=   4 Ivl=1ms
> > I:  If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
> > E:  Ad=88(I) Atr=05(Isoc) MxPS= 156 Ivl=125us
> > I:  If#= 3 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
> > E:  Ad=84(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
> > 
> > Any other suggestions to fix this are welcome.
> 
> Could you show the exact error messages and lsusb -v output?
> We may paper over only the problematic node instead.

Sure, here's the dmesg output on 5.15-rc5 when it is turned on:

[Oct11 17:25] usb 7-2.2: new high-speed USB device number 9 using xhci_hcd
[  +0.122422] usb 7-2.2: New USB device found, idVendor=30be, idProduct=0101, bcdDevice= 1.02
[  +0.000009] usb 7-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[  +0.000002] usb 7-2.2: Product: Schiit Hel
[  +0.000002] usb 7-2.2: Manufacturer: Schiit Audio
[  +0.327172] input: Schiit Audio Schiit Hel as /devices/pci0000:40/0000:40:01.1/0000:41:00.0/0000:42:08.0/0000:47:00.1/usb7/7-2/7-2.2/7-2.2:1.3/0003:30BE:0101.0009/input/input21
[  +0.055134] hid-generic 0003:30BE:0101.0009: input,hidraw8: USB HID v1.00 Device [Schiit Audio Schiit Hel] on usb-0000:47:00.1-2.2/input3
[  +0.135988] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
[  +0.060647] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
[  +0.065362] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
[  +0.192121] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1


And here is the 'lsusb -v' output of the device.


Bus 007 Device 009: ID 30be:0101 Schiit Audio Schiit Hel
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x30be 
  idProduct          0x0101 
  bcdDevice            1.02
  iManufacturer           1 Schiit Audio
  iProduct                2 Schiit Hel
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0198
    bNumInterfaces          4
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xc0
      Self Powered
    MaxPower                0mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         3
      bFunctionClass          1 Audio
      bFunctionSubClass       0 
      bFunctionProtocol      32 
      iFunction               0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      1 Control Device
      bInterfaceProtocol     32 
      iInterface              0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               2.00
        bCategory              10
        wTotalLength       0x0100
        bmControls           0x00
      AudioControl Interface Descriptor:
        bLength                17
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bCSourceID             18
        bNrChannels             0
        bmChannelConfig    0x00000000
        iChannelNames           0 
        bmControls         0x0040
          Cluster Control (read-only)
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                17
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             5
        wTerminalType      0x0201 Microphone
        bAssocTerminal          0
        bCSourceID             22
        bNrChannels             2
        bmChannelConfig    0x00000003
          Front Left (FL)
          Front Right (FR)
        iChannelNames           0 
        bmControls         0x0044
          Connector Control (read-only)
          Cluster Control (read-only)
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             7
        wTerminalType      0x0301 Speaker
        bAssocTerminal          0
        bSourceID              13
        bCSourceID             18
        bmControls         0x0004
          Connector Control (read-only)
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID            11
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID              17
        bCSourceID             22
        bmControls         0x0000
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                18
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                13
        bSourceID               1
        bmaControls(0)     0x00000003
          Mute Control (read/write)
        bmaControls(1)     0x00000000
        bmaControls(2)     0x00000000
        iFeature                0 
      AudioControl Interface Descriptor:
        bLength                18
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                17
        bSourceID               5
        bmaControls(0)     0x00000003
          Mute Control (read/write)
        bmaControls(1)     0x00000000
        bmaControls(2)     0x00000000
        iFeature                0 
      AudioControl Interface Descriptor:
        bLength                 8
        bDescriptorType        36
        bDescriptorSubtype     10 (CLOCK_SOURCE)
        bClockID               18
        bmAttributes            3 Internal programmable clock 
        bmControls           0x07
          Clock Frequency Control (read/write)
          Clock Validity Control (read-only)
        bAssocTerminal          0
        iClockSource            0 
      AudioControl Interface Descriptor:
        bLength                 8
        bDescriptorType        36
        bDescriptorSubtype     10 (CLOCK_SOURCE)
        bClockID               22
        bmAttributes            3 Internal programmable clock 
        bmControls           0x07
          Clock Frequency Control (read/write)
          Clock Validity Control (read-only)
        bAssocTerminal          0
        iClockSource            0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x8f  EP 15 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0006  1x 6 bytes
        bInterval               4
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol     32 
      iInterface              4 Schiit Hel
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           2
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol     32 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                16
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           1
        bmControls           0x05
          Active Alternate Setting Control (read-only)
          Valid Alternate Setting Control (read-only)
        bFormatType             1
        bmFormats          0x00000001
          PCM
        bNrChannels             2
        bmChannelConfig    0x00000003
          Front Left (FL)
          Front Right (FR)
        iChannelNames           0 
      AudioStreaming Interface Descriptor:
        bLength                 6
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bSubslotSize            2
        bBitResolution         16
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x05  EP 5 OUT
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0068  1x 104 bytes
        bInterval               1
        AudioStreaming Endpoint Descriptor:
          bLength                 8
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x00
          bmControls           0x00
          bLockDelayUnits         0 Undefined
          wLockDelay         0x0000
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x85  EP 5 IN
        bmAttributes           17
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Feedback
        wMaxPacketSize     0x0004  1x 4 bytes
        bInterval               4
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           2
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol     32 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                16
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           1
        bmControls           0x05
          Active Alternate Setting Control (read-only)
          Valid Alternate Setting Control (read-only)
        bFormatType             1
        bmFormats          0x00000001
          PCM
        bNrChannels             2
        bmChannelConfig    0x00000003
          Front Left (FL)
          Front Right (FR)
        iChannelNames           0 
      AudioStreaming Interface Descriptor:
        bLength                 6
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bSubslotSize            3
        bBitResolution         24
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x05  EP 5 OUT
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x009c  1x 156 bytes
        bInterval               1
        AudioStreaming Endpoint Descriptor:
          bLength                 8
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x00
          bmControls           0x00
          bLockDelayUnits         0 Undefined
          wLockDelay         0x0000
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x85  EP 5 IN
        bmAttributes           17
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Feedback
        wMaxPacketSize     0x0004  1x 4 bytes
        bInterval               4
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           2
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol     32 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                16
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           1
        bmControls           0x05
          Active Alternate Setting Control (read-only)
          Valid Alternate Setting Control (read-only)
        bFormatType             1
        bmFormats          0x00000001
          PCM
        bNrChannels             2
        bmChannelConfig    0x00000003
          Front Left (FL)
          Front Right (FR)
        iChannelNames           0 
      AudioStreaming Interface Descriptor:
        bLength                 6
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bSubslotSize            4
        bBitResolution         32
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x05  EP 5 OUT
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x00d0  1x 208 bytes
        bInterval               1
        AudioStreaming Endpoint Descriptor:
          bLength                 8
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x00
          bmControls           0x00
          bLockDelayUnits         0 Undefined
          wLockDelay         0x0000
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x85  EP 5 IN
        bmAttributes           17
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Feedback
        wMaxPacketSize     0x0004  1x 4 bytes
        bInterval               4
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol     32 
      iInterface              6 Schiit Hel
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol     32 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                16
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink          11
        bmControls           0x05
          Active Alternate Setting Control (read-only)
          Valid Alternate Setting Control (read-only)
        bFormatType             1
        bmFormats          0x00000001
          PCM
        bNrChannels             2
        bmChannelConfig    0x00000003
          Front Left (FL)
          Front Right (FR)
        iChannelNames           0 
      AudioStreaming Interface Descriptor:
        bLength                 6
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bSubslotSize            3
        bBitResolution         24
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x009c  1x 156 bytes
        bInterval               1
        AudioStreaming Endpoint Descriptor:
          bLength                 8
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x00
          bmControls           0x00
          bLockDelayUnits         0 Undefined
          wLockDelay         0x0000
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         3
      bInterfaceCount         1
      bFunctionClass          3 Human Interface Device
      bFunctionSubClass       0 
      bFunctionProtocol       0 
      iFunction               0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.00
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      50
         Report Descriptors: 
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               4
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0001
  Self Powered


I can easily test any proposed patches :)

thanks,

greg k-h
Takashi Iwai Oct. 11, 2021, 4:07 p.m. UTC | #3
On Mon, 11 Oct 2021 17:28:15 +0200,
Greg Kroah-Hartman wrote:
> 
> On Sun, Oct 10, 2021 at 10:25:09PM +0200, Takashi Iwai wrote:
> > On Sun, 10 Oct 2021 14:22:41 +0200,
> > Greg Kroah-Hartman wrote:
> > > 
> > > The Schiit Hel device does not like to respond to all get_ctl_value_v2()
> > > requests for some reason.  This used to work in older kernels, but now
> > > with more strict checking, this failure causes the device to fail to
> > > work.
> > > 
> > > Cc: Jaroslav Kysela <perex@perex.cz>
> > > Cc: Takashi Iwai <tiwai@suse.com>
> > > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > > ---
> > > 
> > > This fixes the Shiit Hel device that I have.  It used to work on older
> > > kernels (a year ago?), but stopped working for some reason and I didn't
> > > take the time to track it down.  This change fixes the issue for me, but
> > > feels wrong for some reason.  At least now I can use the device as a
> > > headphone driver, much better than the built-in one for my current
> > > machine...
> > > 
> > > If needed, I can take the time to do bisection to track down the real
> > > issue here, it might be due to stricter endpoint checking in the USB
> > > core, but that feels wrong somehow.
> > > 
> > > Here's the debugfs USB output for this device, showing the endpoints:
> > > 
> > > T:  Bus=07 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#=  5 Spd=480 MxCh= 0
> > > D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
> > > P:  Vendor=30be ProdID=0101 Rev=01.02
> > > S:  Manufacturer=Schiit Audio
> > > S:  Product=Schiit Hel
> > > C:  #Ifs= 4 Cfg#= 1 Atr=c0 MxPwr=0mA
> > > I:  If#= 0 Alt= 0 #EPs= 1 Cls=01(audio) Sub=01 Prot=20 Driver=snd-usb-audio
> > > E:  Ad=8f(I) Atr=03(Int.) MxPS=   6 Ivl=1ms
> > > I:  If#= 1 Alt= 1 #EPs= 2 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
> > > E:  Ad=05(O) Atr=05(Isoc) MxPS= 104 Ivl=125us
> > > E:  Ad=85(I) Atr=11(Isoc) MxPS=   4 Ivl=1ms
> > > I:  If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
> > > E:  Ad=88(I) Atr=05(Isoc) MxPS= 156 Ivl=125us
> > > I:  If#= 3 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
> > > E:  Ad=84(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
> > > 
> > > Any other suggestions to fix this are welcome.
> > 
> > Could you show the exact error messages and lsusb -v output?
> > We may paper over only the problematic node instead.
> 
> Sure, here's the dmesg output on 5.15-rc5 when it is turned on:
> 
> [Oct11 17:25] usb 7-2.2: new high-speed USB device number 9 using xhci_hcd
> [  +0.122422] usb 7-2.2: New USB device found, idVendor=30be, idProduct=0101, bcdDevice= 1.02
> [  +0.000009] usb 7-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> [  +0.000002] usb 7-2.2: Product: Schiit Hel
> [  +0.000002] usb 7-2.2: Manufacturer: Schiit Audio
> [  +0.327172] input: Schiit Audio Schiit Hel as /devices/pci0000:40/0000:40:01.1/0000:41:00.0/0000:42:08.0/0000:47:00.1/usb7/7-2/7-2.2/7-2.2:1.3/0003:30BE:0101.0009/input/input21
> [  +0.055134] hid-generic 0003:30BE:0101.0009: input,hidraw8: USB HID v1.00 Device [Schiit Audio Schiit Hel] on usb-0000:47:00.1-2.2/input3
> [  +0.135988] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
> [  +0.060647] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
> [  +0.065362] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
> [  +0.192121] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1

Thanks.  So this happens at the unit 17, and ...


> And here is the 'lsusb -v' output of the device.
> 
> 
> Bus 007 Device 009: ID 30be:0101 Schiit Audio Schiit Hel
(snip)
>       AudioControl Interface Descriptor:
>         bLength                18
>         bDescriptorType        36
>         bDescriptorSubtype      6 (FEATURE_UNIT)
>         bUnitID                17
>         bSourceID               5
>         bmaControls(0)     0x00000003
>           Mute Control (read/write)
>         bmaControls(1)     0x00000000
>         bmaControls(2)     0x00000000
>         iFeature                0 

... this is the entry.

Could you also post the contents of /proc/asound/card*/usbmixer (only
for the corresponding device), too?


thanks,

Takashi
Greg Kroah-Hartman Oct. 11, 2021, 5:23 p.m. UTC | #4
On Mon, Oct 11, 2021 at 06:07:01PM +0200, Takashi Iwai wrote:
> On Mon, 11 Oct 2021 17:28:15 +0200,
> Greg Kroah-Hartman wrote:
> > 
> > On Sun, Oct 10, 2021 at 10:25:09PM +0200, Takashi Iwai wrote:
> > > On Sun, 10 Oct 2021 14:22:41 +0200,
> > > Greg Kroah-Hartman wrote:
> > > > 
> > > > The Schiit Hel device does not like to respond to all get_ctl_value_v2()
> > > > requests for some reason.  This used to work in older kernels, but now
> > > > with more strict checking, this failure causes the device to fail to
> > > > work.
> > > > 
> > > > Cc: Jaroslav Kysela <perex@perex.cz>
> > > > Cc: Takashi Iwai <tiwai@suse.com>
> > > > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > > > ---
> > > > 
> > > > This fixes the Shiit Hel device that I have.  It used to work on older
> > > > kernels (a year ago?), but stopped working for some reason and I didn't
> > > > take the time to track it down.  This change fixes the issue for me, but
> > > > feels wrong for some reason.  At least now I can use the device as a
> > > > headphone driver, much better than the built-in one for my current
> > > > machine...
> > > > 
> > > > If needed, I can take the time to do bisection to track down the real
> > > > issue here, it might be due to stricter endpoint checking in the USB
> > > > core, but that feels wrong somehow.
> > > > 
> > > > Here's the debugfs USB output for this device, showing the endpoints:
> > > > 
> > > > T:  Bus=07 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#=  5 Spd=480 MxCh= 0
> > > > D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
> > > > P:  Vendor=30be ProdID=0101 Rev=01.02
> > > > S:  Manufacturer=Schiit Audio
> > > > S:  Product=Schiit Hel
> > > > C:  #Ifs= 4 Cfg#= 1 Atr=c0 MxPwr=0mA
> > > > I:  If#= 0 Alt= 0 #EPs= 1 Cls=01(audio) Sub=01 Prot=20 Driver=snd-usb-audio
> > > > E:  Ad=8f(I) Atr=03(Int.) MxPS=   6 Ivl=1ms
> > > > I:  If#= 1 Alt= 1 #EPs= 2 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
> > > > E:  Ad=05(O) Atr=05(Isoc) MxPS= 104 Ivl=125us
> > > > E:  Ad=85(I) Atr=11(Isoc) MxPS=   4 Ivl=1ms
> > > > I:  If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
> > > > E:  Ad=88(I) Atr=05(Isoc) MxPS= 156 Ivl=125us
> > > > I:  If#= 3 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
> > > > E:  Ad=84(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
> > > > 
> > > > Any other suggestions to fix this are welcome.
> > > 
> > > Could you show the exact error messages and lsusb -v output?
> > > We may paper over only the problematic node instead.
> > 
> > Sure, here's the dmesg output on 5.15-rc5 when it is turned on:
> > 
> > [Oct11 17:25] usb 7-2.2: new high-speed USB device number 9 using xhci_hcd
> > [  +0.122422] usb 7-2.2: New USB device found, idVendor=30be, idProduct=0101, bcdDevice= 1.02
> > [  +0.000009] usb 7-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> > [  +0.000002] usb 7-2.2: Product: Schiit Hel
> > [  +0.000002] usb 7-2.2: Manufacturer: Schiit Audio
> > [  +0.327172] input: Schiit Audio Schiit Hel as /devices/pci0000:40/0000:40:01.1/0000:41:00.0/0000:42:08.0/0000:47:00.1/usb7/7-2/7-2.2/7-2.2:1.3/0003:30BE:0101.0009/input/input21
> > [  +0.055134] hid-generic 0003:30BE:0101.0009: input,hidraw8: USB HID v1.00 Device [Schiit Audio Schiit Hel] on usb-0000:47:00.1-2.2/input3
> > [  +0.135988] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
> > [  +0.060647] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
> > [  +0.065362] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
> > [  +0.192121] usb 7-2.2: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1
> 
> Thanks.  So this happens at the unit 17, and ...
> 
> 
> > And here is the 'lsusb -v' output of the device.
> > 
> > 
> > Bus 007 Device 009: ID 30be:0101 Schiit Audio Schiit Hel
> (snip)
> >       AudioControl Interface Descriptor:
> >         bLength                18
> >         bDescriptorType        36
> >         bDescriptorSubtype      6 (FEATURE_UNIT)
> >         bUnitID                17
> >         bSourceID               5
> >         bmaControls(0)     0x00000003
> >           Mute Control (read/write)
> >         bmaControls(1)     0x00000000
> >         bmaControls(2)     0x00000000
> >         iFeature                0 
> 
> ... this is the entry.
> 
> Could you also post the contents of /proc/asound/card*/usbmixer (only
> for the corresponding device), too?

Sure, here it is:

USB Mixer: usb_id=0x30be0101, ctrlif=0, ctlerr=0
Card: Schiit Audio Schiit Hel at usb-0000:47:00.1-2.2, high speed
  Unit: 5
    Control: name="Mic - Input Jack", index=0
    Info: id=5, control=2, cmask=0x0, channels=1, type="BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 7
    Control: name="Speaker - Output Jack", index=0
    Info: id=7, control=2, cmask=0x0, channels=1, type="BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 13
    Control: name="PCM Playback Switch", index=0
    Info: id=13, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 17
    Control: name="Mic Capture Switch", index=0
    Info: id=17, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 18
    Control: name="Clock Source 18 Validity", index=0
    Info: id=18, control=2, cmask=0x0, channels=1, type="BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 22
    Control: name="Clock Source 22 Validity", index=0
    Info: id=22, control=2, cmask=0x0, channels=1, type="BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
Takashi Iwai Oct. 12, 2021, 7:35 a.m. UTC | #5
On Mon, 11 Oct 2021 19:23:05 +0200,
Greg Kroah-Hartman wrote:
> 
> On Mon, Oct 11, 2021 at 06:07:01PM +0200, Takashi Iwai wrote:
> > Could you also post the contents of /proc/asound/card*/usbmixer (only
> > for the corresponding device), too?
> 
> Sure, here it is:
> 
> USB Mixer: usb_id=0x30be0101, ctrlif=0, ctlerr=0
> Card: Schiit Audio Schiit Hel at usb-0000:47:00.1-2.2, high speed
>   Unit: 5
>     Control: name="Mic - Input Jack", index=0
>     Info: id=5, control=2, cmask=0x0, channels=1, type="BOOLEAN"
>     Volume: min=0, max=1, dBmin=0, dBmax=0
>   Unit: 7
>     Control: name="Speaker - Output Jack", index=0
>     Info: id=7, control=2, cmask=0x0, channels=1, type="BOOLEAN"
>     Volume: min=0, max=1, dBmin=0, dBmax=0
>   Unit: 13
>     Control: name="PCM Playback Switch", index=0
>     Info: id=13, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
>     Volume: min=0, max=1, dBmin=0, dBmax=0
>   Unit: 17
>     Control: name="Mic Capture Switch", index=0
>     Info: id=17, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
>     Volume: min=0, max=1, dBmin=0, dBmax=0
>   Unit: 18
>     Control: name="Clock Source 18 Validity", index=0
>     Info: id=18, control=2, cmask=0x0, channels=1, type="BOOLEAN"
>     Volume: min=0, max=1, dBmin=0, dBmax=0
>   Unit: 22
>     Control: name="Clock Source 22 Validity", index=0
>     Info: id=22, control=2, cmask=0x0, channels=1, type="BOOLEAN"
>     Volume: min=0, max=1, dBmin=0, dBmax=0

Hm, I expected more exotic control that failed, but it was Mic Capture
Switch, which should be treated normally.

Could you try the patch below?  This will still show other warning
messages, but it'll forcibly initialize the mixer elements at probe
time, and the rest should work.

Once after it's confirmed to work, we may shut up the device warnings
with a quirk.


thanks,

Takashi

--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -361,9 +361,8 @@ static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request,
 
 	memset(buf, 0, sizeof(buf));
 
-	ret = snd_usb_lock_shutdown(chip) ? -EIO : 0;
-	if (ret)
-		goto error;
+	if (snd_usb_lock_shutdown(chip))
+		return -EIO;
 
 	idx = mixer_ctrl_intf(cval->head.mixer) | (cval->head.id << 8);
 	ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
@@ -372,8 +371,7 @@ static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request,
 	snd_usb_unlock_shutdown(chip);
 
 	if (ret < 0) {
-error:
-		usb_audio_err(chip,
+		usb_audio_dbg(chip,
 			"cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
 			request, validx, idx, cval->val_type);
 		return ret;
@@ -1201,12 +1199,32 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval,
 	}
 }
 
+/* forcibly initialize the current mixer value; if GET_CUR fails, set to
+ * the minimum as default
+ */
+static void init_cur_mix_raw(struct usb_mixer_elem_info *cval, int ch, int idx)
+{
+	int val, err;
+
+	err = snd_usb_get_cur_mix_value(cval, ch, idx, &val);
+	if (!err)
+		return;
+	if (!cval->head.mixer->ignore_ctl_error)
+		usb_audio_warn(cval->head.mixer->chip,
+			       "%d:%d: failed to get current value for ch %d (%d)\n",
+			       cval->head.id, mixer_ctrl_intf(cval->head.mixer),
+			       ch, err);
+	snd_usb_set_cur_mix_value(cval, ch, idx, cval->min);
+}
+
 /*
  * retrieve the minimum and maximum values for the specified control
  */
 static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
 				   int default_min, struct snd_kcontrol *kctl)
 {
+	int i, idx;
+
 	/* for failsafe */
 	cval->min = default_min;
 	cval->max = cval->min + 1;
@@ -1219,7 +1237,6 @@ static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
 	} else {
 		int minchn = 0;
 		if (cval->cmask) {
-			int i;
 			for (i = 0; i < MAX_CHANNELS; i++)
 				if (cval->cmask & (1 << i)) {
 					minchn = i + 1;
@@ -1320,6 +1337,19 @@ static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
 		}
 	}
 
+	/* initialize all elements */
+	if (!cval->cmask) {
+		init_cur_mix_raw(cval, 0, 0);
+	} else {
+		idx = 0;
+		for (i = 0; i < MAX_CHANNELS; i++) {
+			if (cval->cmask & (1 << i)) {
+				init_cur_mix_raw(cval, i + 1, idx);
+				idx++;
+			}
+		}
+	}
+
 	return 0;
 }
Greg Kroah-Hartman Oct. 12, 2021, 12:41 p.m. UTC | #6
On Tue, Oct 12, 2021 at 09:35:16AM +0200, Takashi Iwai wrote:
> On Mon, 11 Oct 2021 19:23:05 +0200,
> Greg Kroah-Hartman wrote:
> > 
> > On Mon, Oct 11, 2021 at 06:07:01PM +0200, Takashi Iwai wrote:
> > > Could you also post the contents of /proc/asound/card*/usbmixer (only
> > > for the corresponding device), too?
> > 
> > Sure, here it is:
> > 
> > USB Mixer: usb_id=0x30be0101, ctrlif=0, ctlerr=0
> > Card: Schiit Audio Schiit Hel at usb-0000:47:00.1-2.2, high speed
> >   Unit: 5
> >     Control: name="Mic - Input Jack", index=0
> >     Info: id=5, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> >     Volume: min=0, max=1, dBmin=0, dBmax=0
> >   Unit: 7
> >     Control: name="Speaker - Output Jack", index=0
> >     Info: id=7, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> >     Volume: min=0, max=1, dBmin=0, dBmax=0
> >   Unit: 13
> >     Control: name="PCM Playback Switch", index=0
> >     Info: id=13, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> >     Volume: min=0, max=1, dBmin=0, dBmax=0
> >   Unit: 17
> >     Control: name="Mic Capture Switch", index=0
> >     Info: id=17, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> >     Volume: min=0, max=1, dBmin=0, dBmax=0
> >   Unit: 18
> >     Control: name="Clock Source 18 Validity", index=0
> >     Info: id=18, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> >     Volume: min=0, max=1, dBmin=0, dBmax=0
> >   Unit: 22
> >     Control: name="Clock Source 22 Validity", index=0
> >     Info: id=22, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> >     Volume: min=0, max=1, dBmin=0, dBmax=0
> 
> Hm, I expected more exotic control that failed, but it was Mic Capture
> Switch, which should be treated normally.
> 
> Could you try the patch below?  This will still show other warning
> messages, but it'll forcibly initialize the mixer elements at probe
> time, and the rest should work.
> 
> Once after it's confirmed to work, we may shut up the device warnings
> with a quirk.

Only one warning message shows up, here's the dmesg with this patch
applied:


[Oct12 14:39] usb 7-2.2: new high-speed USB device number 10 using xhci_hcd
[  +0.123157] usb 7-2.2: New USB device found, idVendor=30be, idProduct=0101, bcdDevice= 1.02
[  +0.000009] usb 7-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[  +0.000003] usb 7-2.2: Product: Schiit Hel
[  +0.000002] usb 7-2.2: Manufacturer: Schiit Audio
[  +0.339785] usb 7-2.2: 17:0: failed to get current value for ch 0 (-32)
[  +0.020373] input: Schiit Audio Schiit Hel as /devices/pci0000:40/0000:40:01.1/0000:41:00.0/0000:42:08.0/0000:47:00.1/usb7/7-2/7-2.2/7-2.2:1.3/0003:30BE:0101.000B/input/input24
[  +0.056868] hid-generic 0003:30BE:0101.000B: input,hidraw6: USB HID v1.00 Device [Schiit Audio Schiit Hel] on usb-0000:47:00.1-2.2/input3


I don't see a "mic capture switch" on this device, but maybe it triggers
when I plug a mic into the microphone port, which is currently empty?

thanks,

greg k-h
Takashi Iwai Oct. 12, 2021, 1:24 p.m. UTC | #7
On Tue, 12 Oct 2021 14:41:44 +0200,
Greg Kroah-Hartman wrote:
> 
> On Tue, Oct 12, 2021 at 09:35:16AM +0200, Takashi Iwai wrote:
> > On Mon, 11 Oct 2021 19:23:05 +0200,
> > Greg Kroah-Hartman wrote:
> > > 
> > > On Mon, Oct 11, 2021 at 06:07:01PM +0200, Takashi Iwai wrote:
> > > > Could you also post the contents of /proc/asound/card*/usbmixer (only
> > > > for the corresponding device), too?
> > > 
> > > Sure, here it is:
> > > 
> > > USB Mixer: usb_id=0x30be0101, ctrlif=0, ctlerr=0
> > > Card: Schiit Audio Schiit Hel at usb-0000:47:00.1-2.2, high speed
> > >   Unit: 5
> > >     Control: name="Mic - Input Jack", index=0
> > >     Info: id=5, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > >   Unit: 7
> > >     Control: name="Speaker - Output Jack", index=0
> > >     Info: id=7, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > >   Unit: 13
> > >     Control: name="PCM Playback Switch", index=0
> > >     Info: id=13, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > >   Unit: 17
> > >     Control: name="Mic Capture Switch", index=0
> > >     Info: id=17, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > >   Unit: 18
> > >     Control: name="Clock Source 18 Validity", index=0
> > >     Info: id=18, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > >   Unit: 22
> > >     Control: name="Clock Source 22 Validity", index=0
> > >     Info: id=22, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > 
> > Hm, I expected more exotic control that failed, but it was Mic Capture
> > Switch, which should be treated normally.
> > 
> > Could you try the patch below?  This will still show other warning
> > messages, but it'll forcibly initialize the mixer elements at probe
> > time, and the rest should work.
> > 
> > Once after it's confirmed to work, we may shut up the device warnings
> > with a quirk.
> 
> Only one warning message shows up, here's the dmesg with this patch
> applied:
> 
> 
> [Oct12 14:39] usb 7-2.2: new high-speed USB device number 10 using xhci_hcd
> [  +0.123157] usb 7-2.2: New USB device found, idVendor=30be, idProduct=0101, bcdDevice= 1.02
> [  +0.000009] usb 7-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> [  +0.000003] usb 7-2.2: Product: Schiit Hel
> [  +0.000002] usb 7-2.2: Manufacturer: Schiit Audio
> [  +0.339785] usb 7-2.2: 17:0: failed to get current value for ch 0 (-32)
> [  +0.020373] input: Schiit Audio Schiit Hel as /devices/pci0000:40/0000:40:01.1/0000:41:00.0/0000:42:08.0/0000:47:00.1/usb7/7-2/7-2.2/7-2.2:1.3/0003:30BE:0101.000B/input/input24
> [  +0.056868] hid-generic 0003:30BE:0101.000B: input,hidraw6: USB HID v1.00 Device [Schiit Audio Schiit Hel] on usb-0000:47:00.1-2.2/input3

OK, then the problem is only about this unit and about the master
channel.

> I don't see a "mic capture switch" on this device, but maybe it triggers
> when I plug a mic into the microphone port, which is currently empty?

This should be persistent and visible; try to run "amixer -c1" (or the
different card index for the device).

So far, so good.  The only remaining piece is how this -EPIPE error
comes up.  Is this a protocol stall error or such?  Would it be
avoided by adding the delay like done for some devices?

With the 5.15-rc kernel, you can pass quirk_flags option to
snd-usb-audio module for applying known quirks.
e.g. quirk_flags=0x100 will set the 1msec delay at each control
message.  Please check whether it makes any difference.
The option is an integer array for multiple devices, so if you have
multiple USB-audio devices, put at the appropriate position in the
array (e.g. quirk_flags=,,0x100 for the 3rd slot).

The quirk bit 0x4000 will shut up the control errors.  If the above
doesn't fix the warning and the device is working more or less, set
this quirk to shut up the warning.  It can be set statically in the
table at the end in sound/usb/quirks.c.


Takashi
Greg Kroah-Hartman Oct. 14, 2021, 10:56 a.m. UTC | #8
On Tue, Oct 12, 2021 at 03:24:04PM +0200, Takashi Iwai wrote:
> On Tue, 12 Oct 2021 14:41:44 +0200,
> Greg Kroah-Hartman wrote:
> > 
> > On Tue, Oct 12, 2021 at 09:35:16AM +0200, Takashi Iwai wrote:
> > > On Mon, 11 Oct 2021 19:23:05 +0200,
> > > Greg Kroah-Hartman wrote:
> > > > 
> > > > On Mon, Oct 11, 2021 at 06:07:01PM +0200, Takashi Iwai wrote:
> > > > > Could you also post the contents of /proc/asound/card*/usbmixer (only
> > > > > for the corresponding device), too?
> > > > 
> > > > Sure, here it is:
> > > > 
> > > > USB Mixer: usb_id=0x30be0101, ctrlif=0, ctlerr=0
> > > > Card: Schiit Audio Schiit Hel at usb-0000:47:00.1-2.2, high speed
> > > >   Unit: 5
> > > >     Control: name="Mic - Input Jack", index=0
> > > >     Info: id=5, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > >   Unit: 7
> > > >     Control: name="Speaker - Output Jack", index=0
> > > >     Info: id=7, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > >   Unit: 13
> > > >     Control: name="PCM Playback Switch", index=0
> > > >     Info: id=13, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > >   Unit: 17
> > > >     Control: name="Mic Capture Switch", index=0
> > > >     Info: id=17, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > >   Unit: 18
> > > >     Control: name="Clock Source 18 Validity", index=0
> > > >     Info: id=18, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > >   Unit: 22
> > > >     Control: name="Clock Source 22 Validity", index=0
> > > >     Info: id=22, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > 
> > > Hm, I expected more exotic control that failed, but it was Mic Capture
> > > Switch, which should be treated normally.
> > > 
> > > Could you try the patch below?  This will still show other warning
> > > messages, but it'll forcibly initialize the mixer elements at probe
> > > time, and the rest should work.
> > > 
> > > Once after it's confirmed to work, we may shut up the device warnings
> > > with a quirk.
> > 
> > Only one warning message shows up, here's the dmesg with this patch
> > applied:
> > 
> > 
> > [Oct12 14:39] usb 7-2.2: new high-speed USB device number 10 using xhci_hcd
> > [  +0.123157] usb 7-2.2: New USB device found, idVendor=30be, idProduct=0101, bcdDevice= 1.02
> > [  +0.000009] usb 7-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> > [  +0.000003] usb 7-2.2: Product: Schiit Hel
> > [  +0.000002] usb 7-2.2: Manufacturer: Schiit Audio
> > [  +0.339785] usb 7-2.2: 17:0: failed to get current value for ch 0 (-32)
> > [  +0.020373] input: Schiit Audio Schiit Hel as /devices/pci0000:40/0000:40:01.1/0000:41:00.0/0000:42:08.0/0000:47:00.1/usb7/7-2/7-2.2/7-2.2:1.3/0003:30BE:0101.000B/input/input24
> > [  +0.056868] hid-generic 0003:30BE:0101.000B: input,hidraw6: USB HID v1.00 Device [Schiit Audio Schiit Hel] on usb-0000:47:00.1-2.2/input3
> 
> OK, then the problem is only about this unit and about the master
> channel.
> 
> > I don't see a "mic capture switch" on this device, but maybe it triggers
> > when I plug a mic into the microphone port, which is currently empty?
> 
> This should be persistent and visible; try to run "amixer -c1" (or the
> different card index for the device).
> 
> So far, so good.  The only remaining piece is how this -EPIPE error
> comes up.  Is this a protocol stall error or such?  Would it be
> avoided by adding the delay like done for some devices?
> 
> With the 5.15-rc kernel, you can pass quirk_flags option to
> snd-usb-audio module for applying known quirks.
> e.g. quirk_flags=0x100 will set the 1msec delay at each control
> message.  Please check whether it makes any difference.
> The option is an integer array for multiple devices, so if you have
> multiple USB-audio devices, put at the appropriate position in the
> array (e.g. quirk_flags=,,0x100 for the 3rd slot).

This quirk did not work.  Well, it caused the error to show up after a
delay, but the error is still there.

> The quirk bit 0x4000 will shut up the control errors.  If the above
> doesn't fix the warning and the device is working more or less, set
> this quirk to shut up the warning.  It can be set statically in the
> table at the end in sound/usb/quirks.c.

This quirk did work in that the error messages are still in the kernel
log, but the device seems to work properly now.

Let me send a patch that adds this device to the quirk table.

thanks for your help,

greg k-h
Greg Kroah-Hartman Oct. 14, 2021, 11:21 a.m. UTC | #9
On Thu, Oct 14, 2021 at 12:56:26PM +0200, Greg Kroah-Hartman wrote:
> On Tue, Oct 12, 2021 at 03:24:04PM +0200, Takashi Iwai wrote:
> > On Tue, 12 Oct 2021 14:41:44 +0200,
> > Greg Kroah-Hartman wrote:
> > > 
> > > On Tue, Oct 12, 2021 at 09:35:16AM +0200, Takashi Iwai wrote:
> > > > On Mon, 11 Oct 2021 19:23:05 +0200,
> > > > Greg Kroah-Hartman wrote:
> > > > > 
> > > > > On Mon, Oct 11, 2021 at 06:07:01PM +0200, Takashi Iwai wrote:
> > > > > > Could you also post the contents of /proc/asound/card*/usbmixer (only
> > > > > > for the corresponding device), too?
> > > > > 
> > > > > Sure, here it is:
> > > > > 
> > > > > USB Mixer: usb_id=0x30be0101, ctrlif=0, ctlerr=0
> > > > > Card: Schiit Audio Schiit Hel at usb-0000:47:00.1-2.2, high speed
> > > > >   Unit: 5
> > > > >     Control: name="Mic - Input Jack", index=0
> > > > >     Info: id=5, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > >   Unit: 7
> > > > >     Control: name="Speaker - Output Jack", index=0
> > > > >     Info: id=7, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > >   Unit: 13
> > > > >     Control: name="PCM Playback Switch", index=0
> > > > >     Info: id=13, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > >   Unit: 17
> > > > >     Control: name="Mic Capture Switch", index=0
> > > > >     Info: id=17, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > >   Unit: 18
> > > > >     Control: name="Clock Source 18 Validity", index=0
> > > > >     Info: id=18, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > >   Unit: 22
> > > > >     Control: name="Clock Source 22 Validity", index=0
> > > > >     Info: id=22, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > 
> > > > Hm, I expected more exotic control that failed, but it was Mic Capture
> > > > Switch, which should be treated normally.
> > > > 
> > > > Could you try the patch below?  This will still show other warning
> > > > messages, but it'll forcibly initialize the mixer elements at probe
> > > > time, and the rest should work.
> > > > 
> > > > Once after it's confirmed to work, we may shut up the device warnings
> > > > with a quirk.
> > > 
> > > Only one warning message shows up, here's the dmesg with this patch
> > > applied:
> > > 
> > > 
> > > [Oct12 14:39] usb 7-2.2: new high-speed USB device number 10 using xhci_hcd
> > > [  +0.123157] usb 7-2.2: New USB device found, idVendor=30be, idProduct=0101, bcdDevice= 1.02
> > > [  +0.000009] usb 7-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> > > [  +0.000003] usb 7-2.2: Product: Schiit Hel
> > > [  +0.000002] usb 7-2.2: Manufacturer: Schiit Audio
> > > [  +0.339785] usb 7-2.2: 17:0: failed to get current value for ch 0 (-32)
> > > [  +0.020373] input: Schiit Audio Schiit Hel as /devices/pci0000:40/0000:40:01.1/0000:41:00.0/0000:42:08.0/0000:47:00.1/usb7/7-2/7-2.2/7-2.2:1.3/0003:30BE:0101.000B/input/input24
> > > [  +0.056868] hid-generic 0003:30BE:0101.000B: input,hidraw6: USB HID v1.00 Device [Schiit Audio Schiit Hel] on usb-0000:47:00.1-2.2/input3
> > 
> > OK, then the problem is only about this unit and about the master
> > channel.
> > 
> > > I don't see a "mic capture switch" on this device, but maybe it triggers
> > > when I plug a mic into the microphone port, which is currently empty?
> > 
> > This should be persistent and visible; try to run "amixer -c1" (or the
> > different card index for the device).
> > 
> > So far, so good.  The only remaining piece is how this -EPIPE error
> > comes up.  Is this a protocol stall error or such?  Would it be
> > avoided by adding the delay like done for some devices?
> > 
> > With the 5.15-rc kernel, you can pass quirk_flags option to
> > snd-usb-audio module for applying known quirks.
> > e.g. quirk_flags=0x100 will set the 1msec delay at each control
> > message.  Please check whether it makes any difference.
> > The option is an integer array for multiple devices, so if you have
> > multiple USB-audio devices, put at the appropriate position in the
> > array (e.g. quirk_flags=,,0x100 for the 3rd slot).
> 
> This quirk did not work.  Well, it caused the error to show up after a
> delay, but the error is still there.
> 
> > The quirk bit 0x4000 will shut up the control errors.  If the above
> > doesn't fix the warning and the device is working more or less, set
> > this quirk to shut up the warning.  It can be set statically in the
> > table at the end in sound/usb/quirks.c.
> 
> This quirk did work in that the error messages are still in the kernel
> log, but the device seems to work properly now.
> 
> Let me send a patch that adds this device to the quirk table.

Now done:
	https://lore.kernel.org/r/YWgR3nOI1osvr5Yo@kroah.com
Takashi Iwai Oct. 14, 2021, 11:38 a.m. UTC | #10
On Thu, 14 Oct 2021 12:56:26 +0200,
Greg Kroah-Hartman wrote:
> 
> On Tue, Oct 12, 2021 at 03:24:04PM +0200, Takashi Iwai wrote:
> > On Tue, 12 Oct 2021 14:41:44 +0200,
> > Greg Kroah-Hartman wrote:
> > > 
> > > On Tue, Oct 12, 2021 at 09:35:16AM +0200, Takashi Iwai wrote:
> > > > On Mon, 11 Oct 2021 19:23:05 +0200,
> > > > Greg Kroah-Hartman wrote:
> > > > > 
> > > > > On Mon, Oct 11, 2021 at 06:07:01PM +0200, Takashi Iwai wrote:
> > > > > > Could you also post the contents of /proc/asound/card*/usbmixer (only
> > > > > > for the corresponding device), too?
> > > > > 
> > > > > Sure, here it is:
> > > > > 
> > > > > USB Mixer: usb_id=0x30be0101, ctrlif=0, ctlerr=0
> > > > > Card: Schiit Audio Schiit Hel at usb-0000:47:00.1-2.2, high speed
> > > > >   Unit: 5
> > > > >     Control: name="Mic - Input Jack", index=0
> > > > >     Info: id=5, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > >   Unit: 7
> > > > >     Control: name="Speaker - Output Jack", index=0
> > > > >     Info: id=7, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > >   Unit: 13
> > > > >     Control: name="PCM Playback Switch", index=0
> > > > >     Info: id=13, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > >   Unit: 17
> > > > >     Control: name="Mic Capture Switch", index=0
> > > > >     Info: id=17, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > >   Unit: 18
> > > > >     Control: name="Clock Source 18 Validity", index=0
> > > > >     Info: id=18, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > >   Unit: 22
> > > > >     Control: name="Clock Source 22 Validity", index=0
> > > > >     Info: id=22, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > 
> > > > Hm, I expected more exotic control that failed, but it was Mic Capture
> > > > Switch, which should be treated normally.
> > > > 
> > > > Could you try the patch below?  This will still show other warning
> > > > messages, but it'll forcibly initialize the mixer elements at probe
> > > > time, and the rest should work.
> > > > 
> > > > Once after it's confirmed to work, we may shut up the device warnings
> > > > with a quirk.
> > > 
> > > Only one warning message shows up, here's the dmesg with this patch
> > > applied:
> > > 
> > > 
> > > [Oct12 14:39] usb 7-2.2: new high-speed USB device number 10 using xhci_hcd
> > > [  +0.123157] usb 7-2.2: New USB device found, idVendor=30be, idProduct=0101, bcdDevice= 1.02
> > > [  +0.000009] usb 7-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> > > [  +0.000003] usb 7-2.2: Product: Schiit Hel
> > > [  +0.000002] usb 7-2.2: Manufacturer: Schiit Audio
> > > [  +0.339785] usb 7-2.2: 17:0: failed to get current value for ch 0 (-32)
> > > [  +0.020373] input: Schiit Audio Schiit Hel as /devices/pci0000:40/0000:40:01.1/0000:41:00.0/0000:42:08.0/0000:47:00.1/usb7/7-2/7-2.2/7-2.2:1.3/0003:30BE:0101.000B/input/input24
> > > [  +0.056868] hid-generic 0003:30BE:0101.000B: input,hidraw6: USB HID v1.00 Device [Schiit Audio Schiit Hel] on usb-0000:47:00.1-2.2/input3
> > 
> > OK, then the problem is only about this unit and about the master
> > channel.
> > 
> > > I don't see a "mic capture switch" on this device, but maybe it triggers
> > > when I plug a mic into the microphone port, which is currently empty?
> > 
> > This should be persistent and visible; try to run "amixer -c1" (or the
> > different card index for the device).
> > 
> > So far, so good.  The only remaining piece is how this -EPIPE error
> > comes up.  Is this a protocol stall error or such?  Would it be
> > avoided by adding the delay like done for some devices?
> > 
> > With the 5.15-rc kernel, you can pass quirk_flags option to
> > snd-usb-audio module for applying known quirks.
> > e.g. quirk_flags=0x100 will set the 1msec delay at each control
> > message.  Please check whether it makes any difference.
> > The option is an integer array for multiple devices, so if you have
> > multiple USB-audio devices, put at the appropriate position in the
> > array (e.g. quirk_flags=,,0x100 for the 3rd slot).
> 
> This quirk did not work.  Well, it caused the error to show up after a
> delay, but the error is still there.
> 
> > The quirk bit 0x4000 will shut up the control errors.  If the above
> > doesn't fix the warning and the device is working more or less, set
> > this quirk to shut up the warning.  It can be set statically in the
> > table at the end in sound/usb/quirks.c.
> 
> This quirk did work in that the error messages are still in the kernel
> log, but the device seems to work properly now.
> 
> Let me send a patch that adds this device to the quirk table.

OK, thanks!  The remaining error message should be suppressed with the
patch in my previous mail.  Or maybe we can add a patch to downgrade
the error message to dev_dbg() at first for 5.15, then another one
(initializing all controls at first) to 5.16.


Takashi
Greg Kroah-Hartman Oct. 14, 2021, 12:28 p.m. UTC | #11
On Thu, Oct 14, 2021 at 01:38:32PM +0200, Takashi Iwai wrote:
> On Thu, 14 Oct 2021 12:56:26 +0200,
> Greg Kroah-Hartman wrote:
> > 
> > On Tue, Oct 12, 2021 at 03:24:04PM +0200, Takashi Iwai wrote:
> > > On Tue, 12 Oct 2021 14:41:44 +0200,
> > > Greg Kroah-Hartman wrote:
> > > > 
> > > > On Tue, Oct 12, 2021 at 09:35:16AM +0200, Takashi Iwai wrote:
> > > > > On Mon, 11 Oct 2021 19:23:05 +0200,
> > > > > Greg Kroah-Hartman wrote:
> > > > > > 
> > > > > > On Mon, Oct 11, 2021 at 06:07:01PM +0200, Takashi Iwai wrote:
> > > > > > > Could you also post the contents of /proc/asound/card*/usbmixer (only
> > > > > > > for the corresponding device), too?
> > > > > > 
> > > > > > Sure, here it is:
> > > > > > 
> > > > > > USB Mixer: usb_id=0x30be0101, ctrlif=0, ctlerr=0
> > > > > > Card: Schiit Audio Schiit Hel at usb-0000:47:00.1-2.2, high speed
> > > > > >   Unit: 5
> > > > > >     Control: name="Mic - Input Jack", index=0
> > > > > >     Info: id=5, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > > >   Unit: 7
> > > > > >     Control: name="Speaker - Output Jack", index=0
> > > > > >     Info: id=7, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > > >   Unit: 13
> > > > > >     Control: name="PCM Playback Switch", index=0
> > > > > >     Info: id=13, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> > > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > > >   Unit: 17
> > > > > >     Control: name="Mic Capture Switch", index=0
> > > > > >     Info: id=17, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
> > > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > > >   Unit: 18
> > > > > >     Control: name="Clock Source 18 Validity", index=0
> > > > > >     Info: id=18, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > > >   Unit: 22
> > > > > >     Control: name="Clock Source 22 Validity", index=0
> > > > > >     Info: id=22, control=2, cmask=0x0, channels=1, type="BOOLEAN"
> > > > > >     Volume: min=0, max=1, dBmin=0, dBmax=0
> > > > > 
> > > > > Hm, I expected more exotic control that failed, but it was Mic Capture
> > > > > Switch, which should be treated normally.
> > > > > 
> > > > > Could you try the patch below?  This will still show other warning
> > > > > messages, but it'll forcibly initialize the mixer elements at probe
> > > > > time, and the rest should work.
> > > > > 
> > > > > Once after it's confirmed to work, we may shut up the device warnings
> > > > > with a quirk.
> > > > 
> > > > Only one warning message shows up, here's the dmesg with this patch
> > > > applied:
> > > > 
> > > > 
> > > > [Oct12 14:39] usb 7-2.2: new high-speed USB device number 10 using xhci_hcd
> > > > [  +0.123157] usb 7-2.2: New USB device found, idVendor=30be, idProduct=0101, bcdDevice= 1.02
> > > > [  +0.000009] usb 7-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> > > > [  +0.000003] usb 7-2.2: Product: Schiit Hel
> > > > [  +0.000002] usb 7-2.2: Manufacturer: Schiit Audio
> > > > [  +0.339785] usb 7-2.2: 17:0: failed to get current value for ch 0 (-32)
> > > > [  +0.020373] input: Schiit Audio Schiit Hel as /devices/pci0000:40/0000:40:01.1/0000:41:00.0/0000:42:08.0/0000:47:00.1/usb7/7-2/7-2.2/7-2.2:1.3/0003:30BE:0101.000B/input/input24
> > > > [  +0.056868] hid-generic 0003:30BE:0101.000B: input,hidraw6: USB HID v1.00 Device [Schiit Audio Schiit Hel] on usb-0000:47:00.1-2.2/input3
> > > 
> > > OK, then the problem is only about this unit and about the master
> > > channel.
> > > 
> > > > I don't see a "mic capture switch" on this device, but maybe it triggers
> > > > when I plug a mic into the microphone port, which is currently empty?
> > > 
> > > This should be persistent and visible; try to run "amixer -c1" (or the
> > > different card index for the device).
> > > 
> > > So far, so good.  The only remaining piece is how this -EPIPE error
> > > comes up.  Is this a protocol stall error or such?  Would it be
> > > avoided by adding the delay like done for some devices?
> > > 
> > > With the 5.15-rc kernel, you can pass quirk_flags option to
> > > snd-usb-audio module for applying known quirks.
> > > e.g. quirk_flags=0x100 will set the 1msec delay at each control
> > > message.  Please check whether it makes any difference.
> > > The option is an integer array for multiple devices, so if you have
> > > multiple USB-audio devices, put at the appropriate position in the
> > > array (e.g. quirk_flags=,,0x100 for the 3rd slot).
> > 
> > This quirk did not work.  Well, it caused the error to show up after a
> > delay, but the error is still there.
> > 
> > > The quirk bit 0x4000 will shut up the control errors.  If the above
> > > doesn't fix the warning and the device is working more or less, set
> > > this quirk to shut up the warning.  It can be set statically in the
> > > table at the end in sound/usb/quirks.c.
> > 
> > This quirk did work in that the error messages are still in the kernel
> > log, but the device seems to work properly now.
> > 
> > Let me send a patch that adds this device to the quirk table.
> 
> OK, thanks!  The remaining error message should be suppressed with the
> patch in my previous mail.  Or maybe we can add a patch to downgrade
> the error message to dev_dbg() at first for 5.15, then another one
> (initializing all controls at first) to 5.16.

Either works for me.  If you want me to test anything out with this
device, just let me know!

thanks,

greg k-h
diff mbox series

Patch

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index a2ce535df14b..37d3d697776b 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -371,11 +371,11 @@  static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request,
 			      validx, idx, buf, size);
 	snd_usb_unlock_shutdown(chip);
 
-	if (ret < 0) {
+	if ((ret < 0) && (ret != -EPIPE)) {
 error:
 		usb_audio_err(chip,
-			"cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
-			request, validx, idx, cval->val_type);
+			"cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, ret = %d\n",
+			request, validx, idx, cval->val_type, ret);
 		return ret;
 	}