| Message ID | 20220907152101.2582112-1-m.grzeschik@pengutronix.de |
|---|---|
| Headers | show |
| Series | usb: gadget: uvc: use configfs entries for negotiation and v4l2 VIDIOCS | expand |
On Wed, Sep 07, 2022 at 05:20:57PM +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 > >-- > >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/ >v7: https://lore.kernel.org/linux-usb/20220608105748.139922-1-m.grzeschik@pengutronix.de/ >v8: https://lore.kernel.org/linux-usb/20220907140254.2378109-1-m.grzeschik@pengutronix.de/ >v9: https://lore.kernel.org/linux-usb/20220907150457.2572474-1-m.grzeschik@pengutronix.de/ > >Regards, >Michael > >Michael Grzeschik (4): > media: v4l: move helper functions for fractions from uvc to > v4l2-common > media: uvcvideo: move uvc_format_desc to common header > 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 | 290 +---------------- > drivers/media/usb/uvc/uvc_v4l2.c | 14 +- > drivers/media/usb/uvc/uvcvideo.h | 147 --------- > drivers/media/v4l2-core/v4l2-common.c | 86 +++++ > drivers/usb/gadget/function/f_uvc.c | 270 +++++++++++++++- > drivers/usb/gadget/function/uvc.h | 39 ++- > 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 | 359 +++++++++++++++++++++ > 12 files changed, 1191 insertions(+), 505 deletions(-) > create mode 100644 include/media/v4l2-uvc.h This time I got spoiled by my own tools. :( Just skip everything from v8, with mislabeled fixed+RESEND v8 (actually v9), mislabeled fixed+RESEND v10 and just keep working with v11. Thanks and sorry for the Noise, Michael
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 -- 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/ v7: https://lore.kernel.org/linux-usb/20220608105748.139922-1-m.grzeschik@pengutronix.de/ v8: https://lore.kernel.org/linux-usb/20220907140254.2378109-1-m.grzeschik@pengutronix.de/ v9: https://lore.kernel.org/linux-usb/20220907150457.2572474-1-m.grzeschik@pengutronix.de/ Regards, Michael Michael Grzeschik (4): media: v4l: move helper functions for fractions from uvc to v4l2-common media: uvcvideo: move uvc_format_desc to common header 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 | 290 +---------------- drivers/media/usb/uvc/uvc_v4l2.c | 14 +- drivers/media/usb/uvc/uvcvideo.h | 147 --------- drivers/media/v4l2-core/v4l2-common.c | 86 +++++ drivers/usb/gadget/function/f_uvc.c | 270 +++++++++++++++- drivers/usb/gadget/function/uvc.h | 39 ++- 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 | 359 +++++++++++++++++++++ 12 files changed, 1191 insertions(+), 505 deletions(-) create mode 100644 include/media/v4l2-uvc.h