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usb: gadget: uvc: Expose configuration name through video node

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When utilising multiple instantiations of a UVC gadget on a composite
device, there is no clear method to link a particular configuration to
its respective video node.

Provide a means for identifying the correct video node by exposing the
name of the function configuration through sysfs.

Reviewed-by: Laurent Pinchart <[email protected]>
Signed-off-by: Kieran Bingham <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>
This commit is contained in:
Kieran Bingham 2018-05-24 17:16:12 +01:00 • committed by Felipe Balbi
commit d7af78b924
2 changed files with 28 additions and 1 deletions
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5
Documentation/ABI/testing/configfs-usb-gadget-uvc
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@ -263,3 +263,8 @@ Description: Specific streaming header descriptors
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