From: Michael Grzeschik <m.grzeschik@pengutronix.de>
To: linux-usb@vger.kernel.org
Cc: balbi@kernel.org, laurent.pinchart@ideasonboard.com,
paul.elder@ideasonboard.com, kernel@pengutronix.de
Subject: [PATCH v2 0/7] usb: gadget: uvc: use configfs entries for negotiation and v4l2 VIDIOCS
Date: Wed, 17 Nov 2021 01:44:25 +0100 [thread overview]
Message-ID: <20211117004432.3763306-1-m.grzeschik@pengutronix.de> (raw)
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 duiscussion. [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
--
v1: https://lore.kernel.org/linux-usb/20210530222239.8793-1-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 | 256 +++++++++++++-
drivers/usb/gadget/function/uvc.h | 33 +-
drivers/usb/gadget/function/uvc_configfs.c | 153 +++------
drivers/usb/gadget/function/uvc_configfs.h | 125 ++++++-
drivers/usb/gadget/function/uvc_queue.c | 4 +-
drivers/usb/gadget/function/uvc_v4l2.c | 374 ++++++++++++++++++---
drivers/usb/gadget/function/uvc_video.c | 72 +++-
include/media/v4l2-common.h | 4 +
include/media/v4l2-uvc.h | 351 +++++++++++++++++++
14 files changed, 1291 insertions(+), 603 deletions(-)
create mode 100644 include/media/v4l2-uvc.h
--
2.30.2
next reply other threads:[~2021-11-17 0:44 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-17 0:44 Michael Grzeschik [this message]
2021-11-17 0:44 ` [PATCH v2 1/7] media: v4l: move helper functions for fractions from uvc to v4l2-common Michael Grzeschik
2021-11-17 0:44 ` [PATCH v2 2/7] media: uvcvideo: move uvc_format_desc to common header Michael Grzeschik
2021-11-17 0:44 ` [PATCH v2 3/7] usb: gadget: uvc: prevent index variables to start from 0 Michael Grzeschik
2021-11-17 0:44 ` [PATCH v2 4/7] usb: gadget: uvc: move structs to common header Michael Grzeschik
2021-11-17 0:44 ` [PATCH v2 5/7] usb: gadget: uvc: track frames in format entries Michael Grzeschik
2021-11-17 0:44 ` [PATCH v2 6/7] usb: gadget: uvc: add VIDIOC function Michael Grzeschik
2021-11-17 4:22 ` kernel test robot
2021-11-17 0:44 ` [PATCH v2 7/7] usb: gadget: uvc: add format/frame handling code Michael Grzeschik
2021-11-17 12:26 ` [PATCH v2 0/7] usb: gadget: uvc: use configfs entries for negotiation and v4l2 VIDIOCS Michael Grzeschik
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