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g_audio beaglebone black debugging
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| [root@studio-connect-ad8356 studio]# uname -a | |
| Linux studio-connect-ad8356 3.14.4-1-ARCH #1 SMP Sun May 18 18:32:31 MDT 2014 armv7l GNU/Linux | |
| [root@studio-connect-ad8356 studio]# modprobe g_audio | |
| [ 39.787200] udc musb-hdrc.0.auto: registering UDC driver [g_audio] | |
| [ 39.787252] g_audio gadget: adding config #1 'Linux USB Audio Gadget'/bf109398 | |
| [ 39.787271] g_audio gadget: adding 'uac2_func'/db21e410 to config 'Linux USB Audio Gadget'/bf109398 | |
| [ 39.792063] g_audio gadget: cfg 1/bf109398 speeds: high full | |
| [ 39.792086] g_audio gadget: interface 0 = uac2_func/db21e410 | |
| [ 39.792095] g_audio gadget: interface 1 = uac2_func/db21e410 | |
| [ 39.792103] g_audio gadget: interface 2 = uac2_func/db21e410 | |
| [ 39.792125] g_audio gadget: Linux USB Audio Gadget, version: Feb 2, 2012 | |
| [ 39.799326] g_audio gadget: g_audio ready | |
| [ 40.190218] g_audio gadget: HNP on another port | |
| [ 40.190251] g_audio gadget: high-speed config #1: Linux USB Audio Gadget | |
| [ 40.198191] g_audio gadget: non-core control reqa1.02 v0100 i0500 l2 | |
| [ 40.198269] g_audio gadget: non-core control reqa1.02 v0100 i0500 l14 | |
| [ 40.198664] g_audio gadget: non-core control reqa1.01 v0100 i0500 l4 | |
| [ 40.198906] g_audio gadget: non-core control reqa1.02 v0100 i0600 l2 | |
| [ 40.199030] g_audio gadget: non-core control reqa1.02 v0100 i0600 l14 | |
| [ 40.199285] g_audio gadget: non-core control reqa1.01 v0100 i0600 l4 | |
| [ 283.585722] g_audio gadget: non-core control reqa1.01 v0100 i0600 l4 | |
| [ 299.266366] g_audio gadget: non-core control reqa1.01 v0100 i0600 l4 | |
| [ 312.179135] g_audio gadget: non-core control reqa1.01 v0100 i0600 l4 | |
| [root@studio-connect-ad8356 studio]# aplay -l | |
| **** List of PLAYBACK Hardware Devices **** | |
| card 0: CODEC [USB Audio CODEC], device 0: USB Audio [USB Audio] | |
| Subdevices: 1/1 | |
| Subdevice #0: subdevice #0 | |
| card 1: UAC2Gadget [UAC2_Gadget], device 0: UAC2 PCM [UAC2 PCM] | |
| Subdevices: 1/1 | |
| Subdevice #0: subdevice #0 | |
| [root@studio-connect-ad8356 studio]# arecord -l | |
| **** List of CAPTURE Hardware Devices **** | |
| card 0: CODEC [USB Audio CODEC], device 0: USB Audio [USB Audio] | |
| Subdevices: 1/1 | |
| Subdevice #0: subdevice #0 | |
| card 1: UAC2Gadget [UAC2_Gadget], device 0: UAC2 PCM [UAC2 PCM] | |
| Subdevices: 1/1 | |
| Subdevice #0: subdevice #0 | |
| [root@studio-connect-ad8356 studio]# time aplay -D hw:1,0 music_orig.wav -v | |
| Playing WAVE 'music_orig.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo | |
| Hardware PCM card 1 'UAC2_Gadget' device 0 subdevice 0 | |
| Its setup is: | |
| stream : PLAYBACK | |
| access : RW_INTERLEAVED | |
| format : S16_LE | |
| subformat : STD | |
| channels : 2 | |
| rate : 48000 | |
| exact rate : 48000 (48000/1) | |
| msbits : 16 | |
| buffer_size : 16384 | |
| period_size : 1024 | |
| period_time : 21333 | |
| tstamp_mode : NONE | |
| period_step : 1 | |
| avail_min : 1024 | |
| period_event : 0 | |
| start_threshold : 16384 | |
| stop_threshold : 16384 | |
| silence_threshold: 0 | |
| silence_size : 0 | |
| boundary : 1073741824 | |
| appl_ptr : 0 | |
| hw_ptr : 0 | |
| aplay: pcm_write:1939: write error: Input/output error | |
| real 0m10.042s | |
| user 0m0.020s | |
| sys 0m0.000s | |
| [root@studio-connect-ad8356 studio]# time arecord -f dat -r 64000 -D hw:1,0 test.wav -v | |
| Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 64000 Hz, Stereo | |
| Hardware PCM card 1 'UAC2_Gadget' device 0 subdevice 0 | |
| Its setup is: | |
| stream : CAPTURE | |
| access : RW_INTERLEAVED | |
| format : S16_LE | |
| subformat : STD | |
| channels : 2 | |
| rate : 64000 | |
| exact rate : 64000 (64000/1) | |
| msbits : 16 | |
| buffer_size : 16384 | |
| period_size : 1024 | |
| period_time : 16000 | |
| tstamp_mode : NONE | |
| period_step : 1 | |
| avail_min : 1024 | |
| period_event : 0 | |
| start_threshold : 1 | |
| stop_threshold : 16384 | |
| silence_threshold: 0 | |
| silence_size : 0 | |
| boundary : 1073741824 | |
| appl_ptr : 0 | |
| hw_ptr : 0 | |
| arecord: pcm_read:2031: read error: Input/output error | |
| real 0m10.054s | |
| user 0m0.020s | |
| sys 0m0.000s | |
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| studio@studio-connect-dev ~ $ dmesg | |
| [ 487.618804] usb 7-7: USB disconnect, device number 3 | |
| [ 538.223359] usb 7-7: new high-speed USB device number 4 using ehci-pci | |
| [ 538.347441] usb 7-7: Dual-Role OTG device on non-HNP port | |
| [ 786.823371] retire_capture_urb: 4991 callbacks suppressed | |
| [ 797.455386] retire_capture_urb: 4987 callbacks suppressed | |
| [ 802.457379] retire_capture_urb: 4992 callbacks suppressed | |
| [ 810.371385] retire_capture_urb: 4987 callbacks suppressed | |
| [ 815.373380] retire_capture_urb: 4992 callbacks suppressed | |
| studio@studio-connect-dev ~ $ sudo lsusb -v -d 1d6b:0101 | |
| Bus 007 Device 004: ID 1d6b:0101 Linux Foundation Audio Gadget | |
| Device Descriptor: | |
| bLength 18 | |
| bDescriptorType 1 | |
| bcdUSB 2.00 | |
| bDeviceClass 239 Miscellaneous Device | |
| bDeviceSubClass 2 ? | |
| bDeviceProtocol 1 Interface Association | |
| bMaxPacketSize0 64 | |
| idVendor 0x1d6b Linux Foundation | |
| idProduct 0x0101 Audio Gadget | |
| bcdDevice 3.14 | |
| iManufacturer 1 Linux 3.14.4-1-ARCH with musb-hdrc | |
| iProduct 2 Linux USB Audio Gadget | |
| iSerial 0 | |
| bNumConfigurations 1 | |
| OTG Descriptor: | |
| bLength 3 | |
| bDescriptorType 9 | |
| bmAttributes 0x03 | |
| SRP (Session Request Protocol) | |
| HNP (Host Negotiation Protocol) | |
| Configuration Descriptor: | |
| bLength 9 | |
| bDescriptorType 2 | |
| wTotalLength 222 | |
| bNumInterfaces 3 | |
| bConfigurationValue 1 | |
| iConfiguration 0 | |
| bmAttributes 0xe0 | |
| Self Powered | |
| Remote Wakeup | |
| MaxPower 500mA | |
| Interface Association: | |
| bLength 8 | |
| bDescriptorType 11 | |
| bFirstInterface 0 | |
| bInterfaceCount 3 | |
| bFunctionClass 1 Audio | |
| bFunctionSubClass 0 | |
| bFunctionProtocol 32 | |
| iFunction 4 Source/Sink | |
| Interface Descriptor: | |
| bLength 9 | |
| bDescriptorType 4 | |
| bInterfaceNumber 0 | |
| bAlternateSetting 0 | |
| bNumEndpoints 0 | |
| bInterfaceClass 1 Audio | |
| bInterfaceSubClass 1 Control Device | |
| bInterfaceProtocol 32 | |
| iInterface 5 Topology Control | |
| AudioControl Interface Descriptor: | |
| bLength 9 | |
| bDescriptorType 36 | |
| bDescriptorSubtype 1 (HEADER) | |
| bcdADC 2.00 | |
| bCategory 8 | |
| wTotalLength 74 | |
| bmControl 0x00 | |
| AudioControl Interface Descriptor: | |
| bLength 8 | |
| bDescriptorType 36 | |
| bDescriptorSubtype 10 (CLOCK_SOURCE) | |
| bClockID 6 | |
| bmAttributes 0x01 Internal fixed Clock | |
| bmControls 0x01 | |
| Clock Frequency Control (read-only) | |
| bAssocTerminal 0 | |
| iClockSource 6 48000Hz | |
| AudioControl Interface Descriptor: | |
| bLength 8 | |
| bDescriptorType 36 | |
| bDescriptorSubtype 10 (CLOCK_SOURCE) | |
| bClockID 5 | |
| bmAttributes 0x01 Internal fixed Clock | |
| bmControls 0x01 | |
| Clock Frequency Control (read-only) | |
| bAssocTerminal 0 | |
| iClockSource 7 64000Hz | |
| AudioControl Interface Descriptor: | |
| bLength 17 | |
| bDescriptorType 36 | |
| bDescriptorSubtype 2 (INPUT_TERMINAL) | |
| bTerminalID 1 | |
| wTerminalType 0x0101 USB Streaming | |
| bAssocTerminal 0 | |
| bCSourceID 5 | |
| bNrChannels 2 | |
| bmChannelConfig 0x00000003 | |
| Front Left (FL) | |
| Front Right (FR) | |
| bmControls 0x0003 | |
| Copy Protect Control (read/write) | |
| iChannelNames 0 | |
| iTerminal 8 USBH Out | |
| AudioControl Interface Descriptor: | |
| bLength 17 | |
| bDescriptorType 36 | |
| bDescriptorSubtype 2 (INPUT_TERMINAL) | |
| bTerminalID 2 | |
| wTerminalType 0x0200 Input Undefined | |
| bAssocTerminal 0 | |
| bCSourceID 6 | |
| bNrChannels 2 | |
| bmChannelConfig 0x00000003 | |
| Front Left (FL) | |
| Front Right (FR) | |
| bmControls 0x0003 | |
| Copy Protect Control (read/write) | |
| iChannelNames 0 | |
| iTerminal 9 USBD Out | |
| AudioControl Interface Descriptor: | |
| bLength 12 | |
| bDescriptorType 36 | |
| bDescriptorSubtype 3 (OUTPUT_TERMINAL) | |
| bTerminalID 4 | |
| wTerminalType 0x0101 USB Streaming | |
| bAssocTerminal 0 | |
| bSourceID 2 | |
| bCSourceID 6 | |
| bmControls 0x0003 | |
| Copy Protect Control (read/write) | |
| iTerminal 10 USBH In | |
| AudioControl Interface Descriptor: | |
| bLength 12 | |
| bDescriptorType 36 | |
| bDescriptorSubtype 3 (OUTPUT_TERMINAL) | |
| bTerminalID 3 | |
| wTerminalType 0x0300 Output Undefined | |
| bAssocTerminal 0 | |
| bSourceID 1 | |
| bCSourceID 5 | |
| bmControls 0x0003 | |
| Copy Protect Control (read/write) | |
| iTerminal 11 USBD In | |
| Interface Descriptor: | |
| bLength 9 | |
| bDescriptorType 4 | |
| bInterfaceNumber 1 | |
| bAlternateSetting 0 | |
| bNumEndpoints 0 | |
| bInterfaceClass 1 Audio | |
| bInterfaceSubClass 2 Streaming | |
| bInterfaceProtocol 32 | |
| iInterface 12 Playback Inactive | |
| Interface Descriptor: | |
| bLength 9 | |
| bDescriptorType 4 | |
| bInterfaceNumber 1 | |
| bAlternateSetting 1 | |
| bNumEndpoints 1 | |
| bInterfaceClass 1 Audio | |
| bInterfaceSubClass 2 Streaming | |
| bInterfaceProtocol 32 | |
| iInterface 13 Playback Active | |
| AudioStreaming Interface Descriptor: | |
| bLength 16 | |
| bDescriptorType 36 | |
| bDescriptorSubtype 1 (AS_GENERAL) | |
| bTerminalLink 1 | |
| bmControls 0x00 | |
| 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 0x01 EP 1 OUT | |
| bmAttributes 5 | |
| Transfer Type Isochronous | |
| Synch Type Asynchronous | |
| Usage Type Data | |
| wMaxPacketSize 0x0200 1x 512 bytes | |
| bInterval 4 | |
| AudioControl Endpoint Descriptor: | |
| bLength 8 | |
| bDescriptorType 37 | |
| bDescriptorSubtype 1 (EP_GENERAL) | |
| bmAttributes 0x00 | |
| bmControls 0x00 | |
| bLockDelayUnits 0 Undefined | |
| wLockDelay 0 | |
| Interface Descriptor: | |
| bLength 9 | |
| bDescriptorType 4 | |
| bInterfaceNumber 2 | |
| bAlternateSetting 0 | |
| bNumEndpoints 0 | |
| bInterfaceClass 1 Audio | |
| bInterfaceSubClass 2 Streaming | |
| bInterfaceProtocol 32 | |
| iInterface 14 Capture Inactive | |
| Interface Descriptor: | |
| bLength 9 | |
| bDescriptorType 4 | |
| bInterfaceNumber 2 | |
| bAlternateSetting 1 | |
| bNumEndpoints 1 | |
| bInterfaceClass 1 Audio | |
| bInterfaceSubClass 2 Streaming | |
| bInterfaceProtocol 32 | |
| iInterface 15 Capture Active | |
| AudioStreaming Interface Descriptor: | |
| bLength 16 | |
| bDescriptorType 36 | |
| bDescriptorSubtype 1 (AS_GENERAL) | |
| bTerminalLink 4 | |
| bmControls 0x00 | |
| 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 0x81 EP 1 IN | |
| bmAttributes 5 | |
| Transfer Type Isochronous | |
| Synch Type Asynchronous | |
| Usage Type Data | |
| wMaxPacketSize 0x0200 1x 512 bytes | |
| bInterval 4 | |
| AudioControl Endpoint Descriptor: | |
| bLength 8 | |
| bDescriptorType 37 | |
| bDescriptorSubtype 1 (EP_GENERAL) | |
| bmAttributes 0x00 | |
| bmControls 0x00 | |
| bLockDelayUnits 0 Undefined | |
| wLockDelay 0 | |
| 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: 0x0020 | |
| (Bus Powered) | |
| ALT port is HNP Capable |
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Sorry for commenting on this zombie thread, but I’m running into this same pcm input/output error. Did you ever work around it?