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    Subject[RFCv2 00/17] Request API, take three
    Date
    This is a quickly-put together revision that includes and uses Hans' work to
    use v4l2_ctrl_handler as the request state holder for V4L2 devices. Although
    minor fixes have also been applied, there are still a few comments from the
    previous revision that are left unaddressed. I wanted to give Hans something
    to play with before he forgets what he had in mind for controls. ;)

    Changelog since v1:
    * Integrate Hans control framework patches so S_EXT_CTRLS and G_EXT_CTRLS now
    work with requests
    * Only allow one buffer at a time for a given request in the buffer queue
    * Applied comments related to documentation and document control ioctls
    * Minor small fixes

    I have also updated the very basic program that demonstrates the use of the
    request API on vim2m:

    https://gist.github.com/Gnurou/dbc3776ed97ea7d4ce6041ea15eb0438

    It does not do much, but gives a practical idea of how requests should be used.

    Alexandre Courbot (9):
    media: add request API core and UAPI
    media: videobuf2: add support for requests
    media: vb2: add support for requests in QBUF ioctl
    v4l2: add request API support
    videodev2.h: add request_fd field to v4l2_ext_controls
    v4l2-ctrls: support requests in EXT_CTRLS ioctls
    v4l2: document the request API interface
    media: vim2m: add media device
    media: vim2m: add request support

    Hans Verkuil (7):
    videodev2.h: Add request_fd field to v4l2_buffer
    v4l2-ctrls: v4l2_ctrl_add_handler: add from_other_dev
    v4l2-ctrls: prepare internal structs for request API
    v4l2-ctrls: add core request API
    v4l2-ctrls: use ref in helper instead of ctrl
    v4l2-ctrls: support g/s_ext_ctrls for requests
    v4l2-ctrls: add v4l2_ctrl_request_setup

    Laurent Pinchart (1):
    media: Document the media request API

    Documentation/media/uapi/mediactl/media-funcs.rst | 1 +
    .../media/uapi/mediactl/media-ioc-request-cmd.rst | 141 ++++++++++
    Documentation/media/uapi/v4l/buffer.rst | 10 +-
    Documentation/media/uapi/v4l/common.rst | 1 +
    Documentation/media/uapi/v4l/request-api.rst | 236 ++++++++++++++++
    .../media/uapi/v4l/vidioc-g-ext-ctrls.rst | 16 +-
    Documentation/media/uapi/v4l/vidioc-qbuf.rst | 21 ++
    drivers/media/Makefile | 3 +-
    drivers/media/dvb-frontends/rtl2832_sdr.c | 5 +-
    drivers/media/media-device.c | 7 +
    drivers/media/media-request-mgr.c | 105 +++++++
    drivers/media/media-request.c | 311 +++++++++++++++++++++
    drivers/media/pci/bt8xx/bttv-driver.c | 2 +-
    drivers/media/pci/cx23885/cx23885-417.c | 2 +-
    drivers/media/pci/cx88/cx88-blackbird.c | 2 +-
    drivers/media/pci/cx88/cx88-video.c | 2 +-
    drivers/media/pci/saa7134/saa7134-empress.c | 4 +-
    drivers/media/pci/saa7134/saa7134-video.c | 2 +-
    drivers/media/platform/exynos4-is/fimc-capture.c | 2 +-
    drivers/media/platform/rcar-vin/rcar-v4l2.c | 3 +-
    drivers/media/platform/rcar_drif.c | 2 +-
    drivers/media/platform/soc_camera/soc_camera.c | 3 +-
    drivers/media/platform/vim2m.c | 79 ++++++
    drivers/media/platform/vivid/vivid-ctrls.c | 42 +--
    drivers/media/usb/cpia2/cpia2_v4l.c | 2 +-
    drivers/media/usb/cx231xx/cx231xx-417.c | 2 +-
    drivers/media/usb/cx231xx/cx231xx-video.c | 4 +-
    drivers/media/usb/msi2500/msi2500.c | 2 +-
    drivers/media/usb/tm6000/tm6000-video.c | 2 +-
    drivers/media/v4l2-core/Makefile | 2 +-
    drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 7 +-
    drivers/media/v4l2-core/v4l2-ctrls.c | 238 ++++++++++++++--
    drivers/media/v4l2-core/v4l2-device.c | 3 +-
    drivers/media/v4l2-core/v4l2-ioctl.c | 125 ++++++++-
    drivers/media/v4l2-core/v4l2-request.c | 54 ++++
    drivers/media/v4l2-core/videobuf2-core.c | 133 ++++++++-
    drivers/media/v4l2-core/videobuf2-v4l2.c | 31 +-
    drivers/staging/media/imx/imx-media-dev.c | 2 +-
    drivers/staging/media/imx/imx-media-fim.c | 2 +-
    include/media/media-device.h | 3 +
    include/media/media-entity.h | 9 +
    include/media/media-request-mgr.h | 73 +++++
    include/media/media-request.h | 186 ++++++++++++
    include/media/v4l2-ctrls.h | 17 +-
    include/media/v4l2-request.h | 34 +++
    include/media/videobuf2-core.h | 15 +-
    include/media/videobuf2-v4l2.h | 2 +
    include/uapi/linux/media.h | 10 +
    include/uapi/linux/videodev2.h | 6 +-
    49 files changed, 1881 insertions(+), 85 deletions(-)
    create mode 100644 Documentation/media/uapi/mediactl/media-ioc-request-cmd.rst
    create mode 100644 Documentation/media/uapi/v4l/request-api.rst
    create mode 100644 drivers/media/media-request-mgr.c
    create mode 100644 drivers/media/media-request.c
    create mode 100644 drivers/media/v4l2-core/v4l2-request.c
    create mode 100644 include/media/media-request-mgr.h
    create mode 100644 include/media/media-request.h
    create mode 100644 include/media/v4l2-request.h

    --
    2.16.0.rc1.238.g530d649a79-goog

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