Hi Marisol
Could you try increasing the trace level with:
rmmod uvcvideo
modprobe uvcvideo trace=0xffffffff
And then connect your camera.
That might give you a better idea of what is going on.
You could also use usbmon to discard that there is a problem with the
usb gadget.
Regards!
On Tue, 14 Jun 2022 at 23:31, Marisol Zeledón
<marisol.zeledon@xxxxxxxxxxxx> wrote:
>
> Hi,
>
> I have been trying to build a configfs - composite driver with UVC. I
> have other functions such as mass storage and RNDIS included. When I
> define UVC as the first function, everything seems to work fine, I see
> the video device on my host computer and the device is able to send
> frames to it. All other functions get triggered and work fine. The
> thing is, I need UVC as the second function defined since RNDIS only
> works on a Windows host if it is the first function defined (I need
> this composite driver to work with a Windows host too and this is
> apparently a Microsoft limitation/requirement).
>
> - So when I define UVC as the second function, it is not able to
> create the video device on the host, I get the following logs on the
> Linux host's side:
>
> [40166.930912] uvcvideo: Failed to query (GET_INFO) UVC control 2 on
> unit 1: -32 (exp. 1).
> [40177.294692] uvcvideo: Failed to query (GET_INFO) UVC control 2 on
> unit 2: -110 (exp. 1).
> [40208.014706] uvcvideo: UVC non compliance - GET_DEF(PROBE) not
> supported. Enabling workaround.
> [40213.134647] uvcvideo: Failed to query (129) UVC probe control :
> -110 (exp. 26).
> [40213.134653] uvcvideo: Failed to initialize the device (-5).
>
> - These are the descriptors I get from the host's side:
>
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 3.20
> bDeviceClass 239 Miscellaneous Device
> bDeviceSubClass 2 ?
> bDeviceProtocol 1 Interface Association
> bMaxPacketSize0 9
> idVendor 0x0955 NVidia Corp.
> idProduct 0x7020
> bcdDevice 0.02
> iManufacturer 1
> iProduct 2
> iSerial 3
> bNumConfigurations 1
> Configuration Descriptor:
> bLength 9
> bDescriptorType 2
> wTotalLength 317
> bNumInterfaces 4
> bConfigurationValue 1
> iConfiguration 4
> bmAttributes 0xe0
> Self Powered
> Remote Wakeup
> MaxPower 0mA
> Interface Association:
> bLength 8
> bDescriptorType 11
> bFirstInterface 0
> bInterfaceCount 2
> bFunctionClass 2 Communications
> bFunctionSubClass 6 Ethernet Networking
> bFunctionProtocol 0
> iFunction 7
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 0
> bNumEndpoints 1
> bInterfaceClass 2 Communications
> bInterfaceSubClass 2 Abstract (modem)
> bInterfaceProtocol 255 Vendor Specific (MSFT RNDIS?)
> iInterface 5
> CDC Header:
> bcdCDC 1.10
> CDC Call Management:
> bmCapabilities 0x00
> bDataInterface 1
> CDC ACM:
> bmCapabilities 0x00
> CDC Union:
> bMasterInterface 0
> bSlaveInterface 1
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x82 EP 2 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0008 1x 8 bytes
> bInterval 9
> bMaxBurst 0
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 1
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 10 CDC Data
> bInterfaceSubClass 0 Unused
> bInterfaceProtocol 0
> iInterface 6
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0400 1x 1024 bytes
> bInterval 0
> bMaxBurst 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x01 EP 1 OUT
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0400 1x 1024 bytes
> bInterval 0
> bMaxBurst 0
> Interface Association:
> bLength 8
> bDescriptorType 11
> bFirstInterface 2
> bInterfaceCount 2
> bFunctionClass 14 Video
> bFunctionSubClass 3 Video Interface Collection
> bFunctionProtocol 0
> iFunction 9
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 0
> bNumEndpoints 1
> bInterfaceClass 14 Video
> bInterfaceSubClass 1 Video Control
> bInterfaceProtocol 0
> iInterface 9
> VideoControl Interface Descriptor:
> bLength 13
> bDescriptorType 36
> bDescriptorSubtype 1 (HEADER)
> bcdUVC 1.00
> wTotalLength 52
> dwClockFrequency 48.000000MHz
> bInCollection 1
> baInterfaceNr( 0) 3
> VideoControl Interface Descriptor:
> bLength 18
> bDescriptorType 36
> bDescriptorSubtype 2 (INPUT_TERMINAL)
> bTerminalID 1
> wTerminalType 0x0201 Camera Sensor
> bAssocTerminal 0
> iTerminal 0
> wObjectiveFocalLengthMin 0
> wObjectiveFocalLengthMax 0
> wOcularFocalLength 0
> bControlSize 3
> bmControls 0x00000002
> Auto-Exposure Mode
> VideoControl Interface Descriptor:
> bLength 12
> bDescriptorType 36
> bDescriptorSubtype 5 (PROCESSING_UNIT)
> bUnitID 2
> bSourceID 1
> wMaxMultiplier 16384
> bControlSize 2
> bmControls 0x00000001
> Brightness
> iProcessing 0
> bmVideoStandards 0x 0
> VideoControl Interface Descriptor:
> bLength 9
> bDescriptorType 36
> bDescriptorSubtype 3 (OUTPUT_TERMINAL)
> bTerminalID 3
> wTerminalType 0x0101 USB Streaming
> bAssocTerminal 0
> bSourceID 2
> iTerminal 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x83 EP 3 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0010 1x 16 bytes
> bInterval 8
> bMaxBurst 0
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 3
> bAlternateSetting 0
> bNumEndpoints 1
> bInterfaceClass 14 Video
> bInterfaceSubClass 2 Video Streaming
> bInterfaceProtocol 0
> iInterface 0
> VideoStreaming Interface Descriptor:
> bLength 14
> bDescriptorType 36
> bDescriptorSubtype 1 (INPUT_HEADER)
> bNumFormats 1
> wTotalLength 115
> bEndPointAddress 132
> bmInfo 0
> bTerminalLink 3
> bStillCaptureMethod 0
> bTriggerSupport 0
> bTriggerUsage 0
> bControlSize 1
> bmaControls( 0) 27
> VideoStreaming Interface Descriptor:
> bLength 27
> bDescriptorType 36
> bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED)
> bFormatIndex 1
> bNumFrameDescriptors 2
> guidFormat
> {59555932-0000-1000-8000-00aa00389b71}
> bBitsPerPixel 16
> bDefaultFrameIndex 1
> bAspectRatioX 0
> bAspectRatioY 0
> bmInterlaceFlags 0x00
> Interlaced stream or variable: No
> Fields per frame: 2 fields
> Field 1 first: No
> Field pattern: Field 1 only
> bCopyProtect 0
> VideoStreaming Interface Descriptor:
> bLength 38
> bDescriptorType 36
> bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
> bFrameIndex 1
> bmCapabilities 0x00
> Still image unsupported
> wWidth 640
> wHeight 360
> dwMinBitRate 18432000
> dwMaxBitRate 55296000
> dwMaxVideoFrameBufferSize 460800
> dwDefaultFrameInterval 666666
> bFrameIntervalType 3
> dwFrameInterval( 0) 666666
> dwFrameInterval( 1) 1000000
> dwFrameInterval( 2) 5000000
> VideoStreaming Interface Descriptor:
> bLength 30
> bDescriptorType 36
> bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
> bFrameIndex 2
> bmCapabilities 0x00
> Still image unsupported
> wWidth 1280
> wHeight 720
> dwMinBitRate 29491200
> dwMaxBitRate 29491200
> dwMaxVideoFrameBufferSize 1843200
> dwDefaultFrameInterval 5000000
> bFrameIntervalType 1
> dwFrameInterval( 0) 5000000
> VideoStreaming Interface Descriptor:
> bLength 6
> bDescriptorType 36
> bDescriptorSubtype 13 (COLORFORMAT)
> bColorPrimaries 1 (BT.709,sRGB)
> bTransferCharacteristics 1 (BT.709)
> bMatrixCoefficients 4 (SMPTE 170M (BT.601))
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0400 1x 1024 bytes
> bInterval 0
> bMaxBurst 0
>
>
> On the device's side I don't get any failure logs. Is there any known
> limitation to the UVC driver similar to the RNDIS one in Windows
> hosts? Does it forcefully need to be defined as the first function to
> work?
>
> Thank you in advance,
> --
> Marisol Zeledón Córdoba
> Embedded Software Engineer
> RidgeRun Embedded Solutions
> San José, Costa Rica
--
Ricardo Ribalda
