Commit 17611d3f authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

media: videodev2.h: drop V4L2_CAP_ASYNCIO 



The V4L2_CAP_ASYNCIO capability was never implemented (and in fact
it isn't clear what it was supposed to do in the first place).

Drop it from the capabilities list. Keep it in videodev2.h with the
other defines under ifndef __KERNEL__ for backwards compatibility.

This will free up a capability bit for other future uses. And having
an unused and undefined I/O method is just plain confusing.

Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent 0565b91e

Documentation/userspace-api/media/v4l/async.rst

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.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later



.. _async:



****************

Asynchronous I/O

****************



This method is not defined yet.

Documentation/userspace-api/media/v4l/dev-raw-vbi.rst

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@@ -41,7 +41,7 @@ Devices supporting the raw VBI capturing or output API set the 
in the ``capabilities`` field of struct

:c:type:`v4l2_capability` returned by the

:ref:`VIDIOC_QUERYCAP` ioctl. At least one of the

read/write, streaming or asynchronous I/O methods must be supported. VBI

read/write or streaming I/O methods must be supported. VBI

devices may or may not have a tuner or modulator.



Supplemental Functions

Documentation/userspace-api/media/v4l/dev-sdr.rst

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@@ -34,7 +34,7 @@ Devices supporting the SDR transmitter interface set the 
device has an Digital to Analog Converter (DAC), which is a mandatory

element for the SDR transmitter.



At least one of the read/write, streaming or asynchronous I/O methods

At least one of the read/write or streaming I/O methods

must be supported.

Documentation/userspace-api/media/v4l/dev-sliced-vbi.rst

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@@ -36,7 +36,7 @@ Devices supporting the sliced VBI capturing or output API set the 
respectively, in the ``capabilities`` field of struct

:c:type:`v4l2_capability` returned by the

:ref:`VIDIOC_QUERYCAP` ioctl. At least one of the

read/write, streaming or asynchronous :ref:`I/O methods <io>` must be

read/write or streaming :ref:`I/O methods <io>` must be

supported. Sliced VBI devices may have a tuner or modulator.



Supplemental Functions

Documentation/userspace-api/media/v4l/hist-v4l2.rst

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@@ -316,7 +316,7 @@ This unnamed version was finally merged into Linux 2.5.46. 
    There are new fields to identify the driver, a new RDS device

    function ``V4L2_CAP_RDS_CAPTURE``, the ``V4L2_CAP_AUDIO`` flag

    indicates if the device has any audio connectors, another I/O

    capability ``V4L2_CAP_ASYNCIO`` can be flagged. In response to these

    capability V4L2_CAP_ASYNCIO can be flagged. In response to these

    changes the ``type`` field became a bit set and was merged into the

    ``flags`` field. ``V4L2_FLAG_TUNER`` was renamed to

    ``V4L2_CAP_TUNER``, ``V4L2_CAP_VIDEO_OVERLAY`` replaced