Please use Reply-To-All so that your message gets sent to the mailing list as well as to me. On Tue, Aug 25, 2020 at 06:16:59AM +0200, Jean-Christophe Barnoud wrote: > Le 25/08/2020 à 02:48, Alan Stern a écrit : > > On Mon, Aug 24, 2020 at 06:48:37PM +0200, Jean-Christophe Barnoud wrote: > > > Hello. > > > > > > The team at libusb says that this is a kernel issue so here it is. > > > Device : Sound Devices MixPre-D > > > This is an external audio interface that worked simultaneously as input and > > > output with older kernels and libusb versions (see far below with fedora 26, > > > kernel 4.13.13-200, libusb 0.1.5-8 from an older mothballed machine). > > > With newer versions of the kernel and libusb it works only as output (see > > > just below with a current fedora 32, kernel 5.7.15-200, libusb-0.1.5-16). > > > > > > An online search shows that the dmesg output "duplicate endpoint" is > > > identical to the one referenced in this permalink : > > > http://archive.lwn.net:8080/linux-kernel/20200201105829.5682c887@acme7.acmenet/ > > > So I guess that the solution is the same, adding in > > > drivers/usb/core/quirks.c (adapted to the specific hardware identification) > > > : > > > + /* Sound Devices MixPre-D */ > > > + { USB_DEVICE(0x0926, 0x0208), .driver_info = > > > USB_QUIRK_ENDPOINT_BLACKLIST }, > > More than just this entry is needed; there also has to be an entry > > listing the endpoints to be ignored. But that's straightforward to add. > > > > > + > > > Would it be possible to add this exception to quirks.c ? > > > Thanks > > > > > > > > > Fedora 32 > > > > > > [jcb@localhost ~]$ dmesg > > > [181470.940975] usb 3-9: new high-speed USB device number 6 using xhci_hcd > > > [181471.067606] usb 3-9: config 1 interface 2 altsetting 1 has a duplicate > > > endpoint with address 0x85, skipping > > > [181471.067609] usb 3-9: config 1 interface 2 altsetting 2 has a duplicate > > > endpoint with address 0x85, skipping > > Can you provide the output from "lsusb -v" for this device? We'd like > > to know exactly what's being added to the ignore list and why, before > > doing it. > > > > Alan Stern > > The output of lsusb -v was quite long so here is the part related to the > MixPre-D : > > > Bus 003 Device 004: ID 0926:0208 Sound Devices MixPre-D > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 2.00 > bDeviceClass 239 Miscellaneous Device > bDeviceSubClass 2 > bDeviceProtocol 1 Interface Association > bMaxPacketSize0 64 > idVendor 0x0926 > idProduct 0x0208 > bcdDevice 1.00 > iManufacturer 1 > iProduct 2 > iSerial 3 > bNumConfigurations 1 > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 0x015a > 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 0 > iFunction 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 0 > bNumEndpoints 0 > bInterfaceClass 1 Audio > bInterfaceSubClass 1 Control Device > bInterfaceProtocol 0 > iInterface 0 > AudioControl Interface Descriptor: > bLength 10 > bDescriptorType 36 > bDescriptorSubtype 1 (HEADER) > bcdADC 1.00 > wTotalLength 0x0034 > bInCollection 2 > baInterfaceNr(0) 1 > baInterfaceNr(1) 2 > AudioControl Interface Descriptor: > bLength 12 > bDescriptorType 36 > bDescriptorSubtype 2 (INPUT_TERMINAL) > bTerminalID 1 > wTerminalType 0x0101 USB Streaming > bAssocTerminal 0 > bNrChannels 2 > wChannelConfig 0x0003 > Left Front (L) > Right Front (R) > iChannelNames 0 > iTerminal 0 > AudioControl Interface Descriptor: > bLength 9 > bDescriptorType 36 > bDescriptorSubtype 3 (OUTPUT_TERMINAL) > bTerminalID 2 > wTerminalType 0x0301 Speaker > bAssocTerminal 0 > bSourceID 1 > iTerminal 0 > AudioControl Interface Descriptor: > bLength 12 > bDescriptorType 36 > bDescriptorSubtype 2 (INPUT_TERMINAL) > bTerminalID 3 > wTerminalType 0x0602 Digital Audio Interface > bAssocTerminal 0 > bNrChannels 2 > wChannelConfig 0x0003 > Left Front (L) > Right Front (R) > iChannelNames 0 > iTerminal 0 > AudioControl Interface Descriptor: > bLength 9 > bDescriptorType 36 > bDescriptorSubtype 3 (OUTPUT_TERMINAL) > bTerminalID 4 > wTerminalType 0x0101 USB Streaming > bAssocTerminal 0 > bSourceID 3 > iTerminal 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 0 > bNumEndpoints 0 > bInterfaceClass 1 Audio > bInterfaceSubClass 2 Streaming > bInterfaceProtocol 0 > iInterface 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 1 > bNumEndpoints 2 > bInterfaceClass 1 Audio > bInterfaceSubClass 2 Streaming > bInterfaceProtocol 0 > iInterface 0 > AudioStreaming Interface Descriptor: > bLength 7 > bDescriptorType 36 > bDescriptorSubtype 1 (AS_GENERAL) > bTerminalLink 1 > bDelay 1 frames > wFormatTag 0x0001 PCM > AudioStreaming Interface Descriptor: > bLength 14 > bDescriptorType 36 > bDescriptorSubtype 2 (FORMAT_TYPE) > bFormatType 1 (FORMAT_TYPE_I) > bNrChannels 2 > bSubframeSize 2 > bBitResolution 16 > bSamFreqType 2 Discrete > tSamFreq[ 0] 44100 > tSamFreq[ 1] 48000 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x06 EP 6 OUT > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x0126 1x 294 bytes > bInterval 4 > bRefresh 0 > bSynchAddress 129 > AudioStreaming Endpoint Descriptor: > bLength 7 > bDescriptorType 37 > bDescriptorSubtype 1 (EP_GENERAL) > bmAttributes 0x01 > Sampling Frequency > bLockDelayUnits 2 Decoded PCM samples > wLockDelay 0x0000 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x81 EP 1 IN > bmAttributes 1 > Transfer Type Isochronous > Synch Type None > Usage Type Data > wMaxPacketSize 0x0003 1x 3 bytes > bInterval 4 > bRefresh 5 > bSynchAddress 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 2 > bNumEndpoints 2 > bInterfaceClass 1 Audio > bInterfaceSubClass 2 Streaming > bInterfaceProtocol 0 > iInterface 0 > AudioStreaming Interface Descriptor: > bLength 7 > bDescriptorType 36 > bDescriptorSubtype 1 (AS_GENERAL) > bTerminalLink 1 > bDelay 1 frames > wFormatTag 0x0001 PCM > AudioStreaming Interface Descriptor: > bLength 14 > bDescriptorType 36 > bDescriptorSubtype 2 (FORMAT_TYPE) > bFormatType 1 (FORMAT_TYPE_I) > bNrChannels 2 > bSubframeSize 3 > bBitResolution 24 > bSamFreqType 2 Discrete > tSamFreq[ 0] 44100 > tSamFreq[ 1] 48000 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x06 EP 6 OUT > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x0126 1x 294 bytes > bInterval 4 > bRefresh 0 > bSynchAddress 129 > AudioStreaming Endpoint Descriptor: > bLength 7 > bDescriptorType 37 > bDescriptorSubtype 1 (EP_GENERAL) > bmAttributes 0x01 > Sampling Frequency > bLockDelayUnits 2 Decoded PCM samples > wLockDelay 0x0000 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x81 EP 1 IN > bmAttributes 1 > Transfer Type Isochronous > Synch Type None > Usage Type Data > wMaxPacketSize 0x0003 1x 3 bytes > bInterval 4 > bRefresh 5 > bSynchAddress 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 3 > bNumEndpoints 2 > bInterfaceClass 255 Vendor Specific Class > bInterfaceSubClass 0 > bInterfaceProtocol 0 > iInterface 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x85 EP 5 IN > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x0126 1x 294 bytes > bInterval 1 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x06 EP 6 OUT > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x0126 1x 294 bytes > bInterval 1 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 2 > bAlternateSetting 0 > bNumEndpoints 0 > bInterfaceClass 1 Audio > bInterfaceSubClass 2 Streaming > bInterfaceProtocol 0 > iInterface 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 2 > bAlternateSetting 1 > bNumEndpoints 1 > bInterfaceClass 1 Audio > bInterfaceSubClass 2 Streaming > bInterfaceProtocol 0 > iInterface 0 > AudioStreaming Interface Descriptor: > bLength 7 > bDescriptorType 36 > bDescriptorSubtype 1 (AS_GENERAL) > bTerminalLink 4 > bDelay 1 frames > wFormatTag 0x0001 PCM > AudioStreaming Interface Descriptor: > bLength 14 > bDescriptorType 36 > bDescriptorSubtype 2 (FORMAT_TYPE) > bFormatType 1 (FORMAT_TYPE_I) > bNrChannels 2 > bSubframeSize 2 > bBitResolution 16 > bSamFreqType 2 Discrete > tSamFreq[ 0] 44100 > tSamFreq[ 1] 48000 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x85 EP 5 IN > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x0126 1x 294 bytes > bInterval 4 > bRefresh 0 > bSynchAddress 0 > AudioStreaming Endpoint Descriptor: > bLength 7 > bDescriptorType 37 > bDescriptorSubtype 1 (EP_GENERAL) > bmAttributes 0x01 > Sampling Frequency > bLockDelayUnits 2 Decoded PCM samples > wLockDelay 0x0000 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 2 > bAlternateSetting 2 > bNumEndpoints 1 > bInterfaceClass 1 Audio > bInterfaceSubClass 2 Streaming > bInterfaceProtocol 0 > iInterface 0 > AudioStreaming Interface Descriptor: > bLength 7 > bDescriptorType 36 > bDescriptorSubtype 1 (AS_GENERAL) > bTerminalLink 4 > bDelay 1 frames > wFormatTag 0x0001 PCM > AudioStreaming Interface Descriptor: > bLength 14 > bDescriptorType 36 > bDescriptorSubtype 2 (FORMAT_TYPE) > bFormatType 1 (FORMAT_TYPE_I) > bNrChannels 2 > bSubframeSize 3 > bBitResolution 24 > bSamFreqType 2 Discrete > tSamFreq[ 0] 44100 > tSamFreq[ 1] 48000 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x85 EP 5 IN > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x0126 1x 294 bytes > bInterval 4 > bRefresh 0 > bSynchAddress 0 > AudioStreaming Endpoint Descriptor: > bLength 7 > bDescriptorType 37 > bDescriptorSubtype 1 (EP_GENERAL) > bmAttributes 0x01 > Sampling Frequency > bLockDelayUnits 2 Decoded PCM samples > wLockDelay 0x0000 > 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 1.01 > bCountryCode 0 Not supported > bNumDescriptors 1 > bDescriptorType 34 Report > wDescriptorLength 66 > Report Descriptors: > ** UNAVAILABLE ** > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x82 EP 2 IN > bmAttributes 3 > Transfer Type Interrupt > Synch Type None > Usage Type Data > wMaxPacketSize 0x0040 1x 64 bytes > bInterval 4 Okay, this device does look a lot like the Sound Device USBPre2, so the patch below should work. Please test it and let me know. Warning: This patch was written for 5.9-rc2. It will require a little adaptation to work with earlier kernel versions. Alan Stern Index: usb-devel/drivers/usb/core/quirks.c =================================================================== --- usb-devel.orig/drivers/usb/core/quirks.c +++ usb-devel/drivers/usb/core/quirks.c @@ -370,6 +370,10 @@ static const struct usb_device_id usb_qu { USB_DEVICE(0x0926, 0x0202), .driver_info = USB_QUIRK_ENDPOINT_IGNORE }, + /* Sound Devices MixPre-D */ + { USB_DEVICE(0x0926, 0x0208), .driver_info = + USB_QUIRK_ENDPOINT_IGNORE }, + /* Keytouch QWERTY Panel keyboard */ { USB_DEVICE(0x0926, 0x3333), .driver_info = USB_QUIRK_CONFIG_INTF_STRINGS }, @@ -509,6 +513,7 @@ static const struct usb_device_id usb_am */ static const struct usb_device_id usb_endpoint_ignore[] = { { USB_DEVICE_INTERFACE_NUMBER(0x0926, 0x0202, 1), .driver_info = 0x85 }, + { USB_DEVICE_INTERFACE_NUMBER(0x0926, 0x0208, 1), .driver_info = 0x85 }, { } };
