[linux-uvc-devel] Little trouble with c920 and LED1

[Bertram L. <lis...@sp...>]

Hi!

I'm using an logitech c920 HD webcam (046d:082d), but i've trouble changing the LED settings:

# uvcdynctrl -s 'LED1 Mode' 2
ERROR: Unknown control specified.

Same for mode 0 to 3.

AFAIK, this should be possible, see also
http://forums.logitech.com/t5/Webcams/c920-activity-light/td-p/824181

Any suggestions how to get it work?



# uvcdynctrl -V
uvcdynctrl 0.2.2

# uname -a
Linux debian 3.2.0-2-amd64 #1 SMP Mon Jun 11 17:24:18 UTC 2012 x86_64 GNU/Linux

# uvcdynctrl -c
Listing available controls for device video0:
  Brightness
  Contrast
  Saturation
  White Balance Temperature, Auto
  Gain
  Power Line Frequency
  White Balance Temperature
  Sharpness
  Backlight Compensation
  Exposure, Auto
  Exposure (Absolute)
  Exposure, Auto Priority
  Pan (Absolute)
  Tilt (Absolute)
  Focus (absolute)
  Focus, Auto
  Zoom, Absolute

# uvcdynctrl -c -i /usr/share/uvcdynctrl/data/046d/logitech.xml 
Importing dynamic controls from file /usr/share/uvcdynctrl/data/046d/logitech.xml.
/usr/share/uvcdynctrl/data/046d/logitech.xml: error: video0: unable to map 'LED1 Mode' control. ioctl(UVCIOC_CTRL_MAP) failed with return value -1 (error 2: No such file or directory)
/usr/share/uvcdynctrl/data/046d/logitech.xml: error: video0: unable to map 'LED1 Frequency' control. ioctl(UVCIOC_CTRL_MAP) failed with return value -1 (error 2: No such file or directory)
/usr/share/uvcdynctrl/data/046d/logitech.xml: error: video0: unable to map 'Disable video processing' control. ioctl(UVCIOC_CTRL_MAP) failed with return value -1 (error 2: No such file or directory)
/usr/share/uvcdynctrl/data/046d/logitech.xml: error: video0: unable to map 'Raw bits per pixel' control. ioctl(UVCIOC_CTRL_MAP) failed with return value -1 (error 2: No such file or directory)


# uvcdynctrl -l
Listing available devices:
  video0   HD Pro Webcam C920
    Media controller device: /dev/media0
    Entity 1: HD Pro Webcam C920. Type: 65537, Revision: 0, Flags: 0, Group-id: 0, Pads: 1, Links: 0
      Device node   
      Entity: 1, Pad 0, Flags: 1
    Entity 2: Processing 3. Type: 131072, Revision: 0, Flags: 0, Group-id: 0, Pads: 2, Links: 3
      Subdevice:       Entity: 2, Pad 0, Flags: 1
      Entity: 2, Pad 1, Flags: 2
      Out link: Source pad { Entity: 2, Index: 1, Flags: 2 } => Sink pad { Entity: 1, Index: 0, Flags: 1 }
      Out link: Source pad { Entity: 2, Index: 1, Flags: 2 } => Sink pad { Entity: 3, Index: 0, Flags: 1 }
      Out link: Source pad { Entity: 2, Index: 1, Flags: 2 } => Sink pad { Entity: 4, Index: 0, Flags: 1 }
    Entity 3: Extension 6. Type: 131072, Revision: 0, Flags: 0, Group-id: 0, Pads: 2, Links: 0
      Subdevice:       Entity: 3, Pad 0, Flags: 1
      Entity: 3, Pad 1, Flags: 2
    Entity 4: Extension 12. Type: 131072, Revision: 0, Flags: 0, Group-id: 0, Pads: 2, Links: 0
      Subdevice:       Entity: 4, Pad 0, Flags: 1
      Entity: 4, Pad 1, Flags: 2
    Entity 5: Camera 1. Type: 131072, Revision: 0, Flags: 0, Group-id: 0, Pads: 1, Links: 5
      Subdevice:       Entity: 5, Pad 0, Flags: 2
      Out link: Source pad { Entity: 5, Index: 0, Flags: 2 } => Sink pad { Entity: 2, Index: 0, Flags: 1 }
      Out link: Source pad { Entity: 5, Index: 0, Flags: 2 } => Sink pad { Entity: 6, Index: 0, Flags: 1 }
      Out link: Source pad { Entity: 5, Index: 0, Flags: 2 } => Sink pad { Entity: 7, Index: 0, Flags: 1 }
      Out link: Source pad { Entity: 5, Index: 0, Flags: 2 } => Sink pad { Entity: 8, Index: 0, Flags: 1 }
      Out link: Source pad { Entity: 5, Index: 0, Flags: 2 } => Sink pad { Entity: 9, Index: 0, Flags: 1 }
    Entity 6: Extension 8. Type: 131072, Revision: 0, Flags: 0, Group-id: 0, Pads: 2, Links: 0
      Subdevice:       Entity: 6, Pad 0, Flags: 1
      Entity: 6, Pad 1, Flags: 2
    Entity 7: Extension 9. Type: 131072, Revision: 0, Flags: 0, Group-id: 0, Pads: 2, Links: 0
      Subdevice:       Entity: 7, Pad 0, Flags: 1
      Entity: 7, Pad 1, Flags: 2
    Entity 8: Extension 10. Type: 131072, Revision: 0, Flags: 0, Group-id: 0, Pads: 2, Links: 0
      Subdevice:       Entity: 8, Pad 0, Flags: 1
      Entity: 8, Pad 1, Flags: 2
    Entity 9: Extension 11. Type: 131072, Revision: 0, Flags: 0, Group-id: 0, Pads: 2, Links: 0
      Subdevice:       Entity: 9, Pad 0, Flags: 1
      Entity: 9, Pad 1, Flags: 2


Thanks,

Bertram