From: Hans Verkuil Date: Thu, 18 Aug 2022 07:51:40 +0000 (+0200) Subject: media: videodev2.h: drop V4L2_CAP_ASYNCIO X-Git-Tag: v6.6.17~6464^2~49 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=17611d3fb4a11ec500c49cb952faf09e114a5a10;p=platform%2Fkernel%2Flinux-rpi.git 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: Hans Verkuil Reviewed-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- diff --git a/Documentation/userspace-api/media/v4l/async.rst b/Documentation/userspace-api/media/v4l/async.rst deleted file mode 100644 index d6960ff..0000000 --- a/Documentation/userspace-api/media/v4l/async.rst +++ /dev/null @@ -1,9 +0,0 @@ -.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later - -.. _async: - -**************** -Asynchronous I/O -**************** - -This method is not defined yet. diff --git a/Documentation/userspace-api/media/v4l/dev-raw-vbi.rst b/Documentation/userspace-api/media/v4l/dev-raw-vbi.rst index 58f97c3..2bec20d 100644 --- a/Documentation/userspace-api/media/v4l/dev-raw-vbi.rst +++ b/Documentation/userspace-api/media/v4l/dev-raw-vbi.rst @@ -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 diff --git a/Documentation/userspace-api/media/v4l/dev-sdr.rst b/Documentation/userspace-api/media/v4l/dev-sdr.rst index 928884d..dfdeddb 100644 --- a/Documentation/userspace-api/media/v4l/dev-sdr.rst +++ b/Documentation/userspace-api/media/v4l/dev-sdr.rst @@ -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. diff --git a/Documentation/userspace-api/media/v4l/dev-sliced-vbi.rst b/Documentation/userspace-api/media/v4l/dev-sliced-vbi.rst index 97ec2b1..4441582 100644 --- a/Documentation/userspace-api/media/v4l/dev-sliced-vbi.rst +++ b/Documentation/userspace-api/media/v4l/dev-sliced-vbi.rst @@ -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 ` must be +read/write or streaming :ref:`I/O methods ` must be supported. Sliced VBI devices may have a tuner or modulator. Supplemental Functions diff --git a/Documentation/userspace-api/media/v4l/hist-v4l2.rst b/Documentation/userspace-api/media/v4l/hist-v4l2.rst index 28a2750d..dbc0437 100644 --- a/Documentation/userspace-api/media/v4l/hist-v4l2.rst +++ b/Documentation/userspace-api/media/v4l/hist-v4l2.rst @@ -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 diff --git a/Documentation/userspace-api/media/v4l/io.rst b/Documentation/userspace-api/media/v4l/io.rst index ce0cece..4b1964d 100644 --- a/Documentation/userspace-api/media/v4l/io.rst +++ b/Documentation/userspace-api/media/v4l/io.rst @@ -17,8 +17,7 @@ read or write will fail at any time. Other methods must be negotiated. To select the streaming I/O method with memory mapped or user buffers applications call the -:ref:`VIDIOC_REQBUFS` ioctl. The asynchronous I/O -method is not defined yet. +:ref:`VIDIOC_REQBUFS` ioctl. Video overlay can be considered another I/O method, although the application does not directly receive the image data. It is selected by @@ -46,6 +45,5 @@ The following sections describe the various I/O methods in more detail. mmap userp dmabuf - async buffer field-order diff --git a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst index 63e23f6..6c57b84 100644 --- a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst +++ b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst @@ -244,9 +244,6 @@ specification the ioctl returns an ``EINVAL`` error code. - 0x01000000 - The device supports the :c:func:`read()` and/or :c:func:`write()` I/O methods. - * - ``V4L2_CAP_ASYNCIO`` - - 0x02000000 - - The device supports the :ref:`asynchronous ` I/O methods. * - ``V4L2_CAP_STREAMING`` - 0x04000000 - The device supports the :ref:`streaming ` I/O method. diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index c415ce5..86cae23 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -502,7 +502,6 @@ struct v4l2_capability { #define V4L2_CAP_META_CAPTURE 0x00800000 /* Is a metadata capture device */ #define V4L2_CAP_READWRITE 0x01000000 /* read/write systemcalls */ -#define V4L2_CAP_ASYNCIO 0x02000000 /* async I/O */ #define V4L2_CAP_STREAMING 0x04000000 /* streaming I/O ioctls */ #define V4L2_CAP_META_OUTPUT 0x08000000 /* Is a metadata output device */ @@ -2683,6 +2682,11 @@ struct v4l2_create_buffers { #ifndef __KERNEL__ #define V4L2_PIX_FMT_HM12 V4L2_PIX_FMT_NV12_16L16 #define V4L2_PIX_FMT_SUNXI_TILED_NV12 V4L2_PIX_FMT_NV12_32L32 +/* + * This capability was never implemented, anyone using this cap should drop it + * from their code. + */ +#define V4L2_CAP_ASYNCIO 0x02000000 #endif #endif /* _UAPI__LINUX_VIDEODEV2_H */