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What: /config/usb-gadget/gadget/functions/uvc.name
Date: Dec 2014
KernelVersion: 4.0
Description: UVC function directory
streaming_maxburst - 0..15 (ss only)
streaming_maxpacket - 1..1023 (fs), 1..3072 (hs/ss)
streaming_interval - 1..16
What: /config/usb-gadget/gadget/functions/uvc.name/control
Date: Dec 2014
KernelVersion: 4.0
Description: Control descriptors
All attributes read only:
bInterfaceNumber - USB interface number for this
streaming interface
What: /config/usb-gadget/gadget/functions/uvc.name/control/class
Date: Dec 2014
KernelVersion: 4.0
Description: Class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/class/ss
Date: Dec 2014
KernelVersion: 4.0
Description: Super speed control class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/class/fs
Date: Dec 2014
KernelVersion: 4.0
Description: Full speed control class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal
Date: Dec 2014
KernelVersion: 4.0
Description: Terminal descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output
Date: Dec 2014
KernelVersion: 4.0
Description: Output terminal descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output/default
Date: Dec 2014
KernelVersion: 4.0
Description: Default output terminal descriptors
All attributes read only:
iTerminal - index of string descriptor
bSourceID - id of the terminal to which this terminal
is connected
bAssocTerminal - id of the input terminal to which this output
terminal is associated
wTerminalType - terminal type
bTerminalID - a non-zero id of this terminal
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera
Date: Dec 2014
KernelVersion: 4.0
Description: Camera terminal descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera/default
Date: Dec 2014
KernelVersion: 4.0
Description: Default camera terminal descriptors
All attributes read only:
bmControls - bitmap specifying which controls are
supported for the video stream
wOcularFocalLength - the value of Locular
wObjectiveFocalLengthMax- the value of Lmin
wObjectiveFocalLengthMin- the value of Lmax
iTerminal - index of string descriptor
bAssocTerminal - id of the output terminal to which
this terminal is connected
wTerminalType - terminal type
bTerminalID - a non-zero id of this terminal
What: /config/usb-gadget/gadget/functions/uvc.name/control/processing
Date: Dec 2014
KernelVersion: 4.0
Description: Processing unit descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/processing/default
Date: Dec 2014
KernelVersion: 4.0
Description: Default processing unit descriptors
All attributes read only:
iProcessing - index of string descriptor
bmControls - bitmap specifying which controls are
supported for the video stream
wMaxMultiplier - maximum digital magnification x100
bSourceID - id of the terminal to which this unit is
connected
bUnitID - a non-zero id of this unit
What: /config/usb-gadget/gadget/functions/uvc.name/control/header
Date: Dec 2014
KernelVersion: 4.0
Description: Control header descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/header/name
Date: Dec 2014
KernelVersion: 4.0
Description: Specific control header descriptors
dwClockFrequency
bcdUVC
What: /config/usb-gadget/gadget/functions/uvc.name/streaming
Date: Dec 2014
KernelVersion: 4.0
Description: Streaming descriptors
All attributes read only:
bInterfaceNumber - USB interface number for this
streaming interface
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class
Date: Dec 2014
KernelVersion: 4.0
Description: Streaming class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/ss
Date: Dec 2014
KernelVersion: 4.0
Description: Super speed streaming class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/hs
Date: Dec 2014
KernelVersion: 4.0
Description: High speed streaming class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/fs
Date: Dec 2014
KernelVersion: 4.0
Description: Full speed streaming class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching
Date: Dec 2014
KernelVersion: 4.0
Description: Color matching descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching/default
Date: Dec 2014
KernelVersion: 4.0
Description: Default color matching descriptors
All attributes read only:
bMatrixCoefficients - matrix used to compute luma and
chroma values from the color primaries
bTransferCharacteristics- optoelectronic transfer
characteristic of the source picutre,
also called the gamma function
bColorPrimaries - color primaries and the reference
white
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg
Date: Dec 2014
KernelVersion: 4.0
Description: MJPEG format descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name
Date: Dec 2014
KernelVersion: 4.0
Description: Specific MJPEG format descriptors
All attributes read only,
except bmaControls and bDefaultFrameIndex:
bFormatIndex - unique id for this format descriptor;
only defined after parent header is
linked into the streaming class;
read-only
bmaControls - this format's data for bmaControls in
the streaming header
bmInterfaceFlags - specifies interlace information,
read-only
bAspectRatioY - the X dimension of the picture aspect
ratio, read-only
bAspectRatioX - the Y dimension of the picture aspect
ratio, read-only
bmFlags - characteristics of this format,
read-only
bDefaultFrameIndex - optimum frame index for this stream
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name/name
Date: Dec 2014
KernelVersion: 4.0
Description: Specific MJPEG frame descriptors
bFrameIndex - unique id for this framedescriptor;
only defined after parent format is
linked into the streaming header;
read-only
dwFrameInterval - indicates how frame interval can be
programmed; a number of values
separated by newline can be specified
dwDefaultFrameInterval - the frame interval the device would
like to use as default
dwMaxVideoFrameBufferSize- the maximum number of bytes the
compressor will produce for a video
frame or still image
dwMaxBitRate - the maximum bit rate at the shortest
frame interval in bps
dwMinBitRate - the minimum bit rate at the longest
frame interval in bps
wHeight - height of decoded bitmap frame in px
wWidth - width of decoded bitmam frame in px
bmCapabilities - still image support, fixed frame-rate
support
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed
Date: Dec 2014
KernelVersion: 4.0
Description: Uncompressed format descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name
Date: Dec 2014
KernelVersion: 4.0
Description: Specific uncompressed format descriptors
bFormatIndex - unique id for this format descriptor;
only defined after parent header is
linked into the streaming class;
read-only
bmaControls - this format's data for bmaControls in
the streaming header
bmInterfaceFlags - specifies interlace information,
read-only
bAspectRatioY - the X dimension of the picture aspect
ratio, read-only
bAspectRatioX - the Y dimension of the picture aspect
ratio, read-only
bDefaultFrameIndex - optimum frame index for this stream
bBitsPerPixel - number of bits per pixel used to
specify color in the decoded video
frame
guidFormat - globally unique id used to identify
stream-encoding format
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name/name
Date: Dec 2014
KernelVersion: 4.0
Description: Specific uncompressed frame descriptors
bFrameIndex - unique id for this framedescriptor;
only defined after parent format is
linked into the streaming header;
read-only
dwFrameInterval - indicates how frame interval can be
programmed; a number of values
separated by newline can be specified
dwDefaultFrameInterval - the frame interval the device would
like to use as default
dwMaxVideoFrameBufferSize- the maximum number of bytes the
compressor will produce for a video
frame or still image
dwMaxBitRate - the maximum bit rate at the shortest
frame interval in bps
dwMinBitRate - the minimum bit rate at the longest
frame interval in bps
wHeight - height of decoded bitmap frame in px
wWidth - width of decoded bitmam frame in px
bmCapabilities - still image support, fixed frame-rate
support
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header
Date: Dec 2014
KernelVersion: 4.0
Description: Streaming header descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header/name
Date: Dec 2014
KernelVersion: 4.0
Description: Specific streaming header descriptors
All attributes read only:
bTriggerUsage - how the host software will respond to
a hardware trigger interrupt event
bTriggerSupport - flag specifying if hardware
triggering is supported
bStillCaptureMethod - method of still image caputre
supported
bTerminalLink - id of the output terminal to which
the video endpoint of this interface
is connected
bmInfo - capabilities of this video streaming
interface
What: /sys/class/udc/udc.name/device/gadget/video4linux/video.name/function_name
Date: May 2018
KernelVersion: 4.19
Description: UVC configfs function instance name
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