* Re: [PATCH v7 0/7] usb: gadget: uvc: use configfs entries for negotiation and v4l2 VIDIOCS
[not found] <20220315143356.3919911-1-m.grzeschik@pengutronix.de>
@ 2022-04-07 19:53 ` Michael Grzeschik
2022-04-08 4:49 ` Greg KH
0 siblings, 1 reply; 2+ messages in thread
From: Michael Grzeschik @ 2022-04-07 19:53 UTC (permalink / raw)
To: linux-usb
Cc: balbi, paul.elder, kieran.bingham, nicolas, laurent.pinchart,
kernel, linux-media
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On Tue, Mar 15, 2022 at 03:33:49PM +0100, 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
Cc: linux-media@vger.kernel.org
>--
>
>v1: https://lore.kernel.org/linux-usb/20210530222239.8793-1-m.grzeschik@pengutronix.de/
>v2: https://lore.kernel.org/linux-usb/20211117004432.3763306-1-m.grzeschik@pengutronix.de/
>v3: https://lore.kernel.org/linux-usb/20211117122435.2409362-1-m.grzeschik@pengutronix.de/
>v4: https://lore.kernel.org/linux-usb/20211205225803.268492-1-m.grzeschik@pengutronix.de/
>v5: https://lore.kernel.org/linux-usb/20211209084322.2662616-1-m.grzeschik@pengutronix.de/
>v6: https://lore.kernel.org/linux-usb/20220105115527.3592860-1-m.grzeschik@pengutronix.de/
>
>Regards,
>Michael
>
>Michael Grzeschik (7):
> media: v4l: move helper functions for fractions from uvc to
> v4l2-common
> media: uvcvideo: move uvc_format_desc to common header
> usb: gadget: uvc: prevent index variables to start from 0
> usb: gadget: uvc: move structs to common header
> usb: gadget: uvc: track frames in format entries
> usb: gadget: uvc: add VIDIOC function
> usb: gadget: uvc: add format/frame handling code
>
> drivers/media/usb/uvc/uvc_ctrl.c | 1 +
> drivers/media/usb/uvc/uvc_driver.c | 281 +-------------
> drivers/media/usb/uvc/uvc_v4l2.c | 14 +-
> drivers/media/usb/uvc/uvcvideo.h | 144 -------
> drivers/media/v4l2-core/v4l2-common.c | 82 ++++
> drivers/usb/gadget/function/f_uvc.c | 271 +++++++++++++-
> drivers/usb/gadget/function/uvc.h | 39 +-
> drivers/usb/gadget/function/uvc_configfs.c | 148 ++------
> drivers/usb/gadget/function/uvc_configfs.h | 120 +++++-
> drivers/usb/gadget/function/uvc_queue.c | 3 +-
> drivers/usb/gadget/function/uvc_v4l2.c | 412 ++++++++++++++++++---
> drivers/usb/gadget/function/uvc_video.c | 71 +++-
> include/media/v4l2-common.h | 4 +
> include/media/v4l2-uvc.h | 351 ++++++++++++++++++
> 14 files changed, 1336 insertions(+), 605 deletions(-)
> create mode 100644 include/media/v4l2-uvc.h
>
>--
>2.30.2
>
>
>
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