Re: [fixed+RESEND v8 0/4] usb: gadget: uvc: use configfs entries for negotiation and v4l2 VIDIOCS

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On Wed, Sep 07, 2022 at 05:04:53PM +0200, Michael Grzeschik wrote:
> This series improves the uvc video gadget by parsing the configfs
> entries. With the configfs data, the driver now is able to negotiate the
> format with the usb host in the kernel and also exports the supported
> frames/formats/intervals via the v4l2 VIDIOC interface.
> 
> The uvc userspace stack is also under development. One example is an generic
> v4l2uvcsink gstreamer elemnt, which is currently under discussion. [1]
> 
> [1] https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1304
> 
> With the libusbgx library [1] used by the gadget-tool [2] it is now also
> possible to fully describe the configfs layout of the uvc gadget with scheme
> files.
> 
> [2] https://github.com/linux-usb-gadgets/libusbgx/pull/61/commits/53231c76f9d512f59fdc23b65cd5c46b7fb09eb4
> 
> [3] https://github.com/linux-usb-gadgets/gt/tree/master/examples/systemd
> 
> The bigger picture of these patches is to provide a more versatile interface to
> the uvc gadget. The goal is to simply start a uvc-gadget with the following
> commands:
> 
> $ gt load uvc.scheme
> $ gst-launch v4l2src ! v4l2uvcsink

This really is a "v9", the use of RESEND and "fixed+" will play havoc
with our tools.

Please fix up and try a real v10.

thanks,

greg k-h



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