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Diffstat (limited to '')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst (renamed from Documentation/media/uapi/v4l/vidioc-create-bufs.rst) | 32 |
1 files changed, 14 insertions, 18 deletions
diff --git a/Documentation/media/uapi/v4l/vidioc-create-bufs.rst b/Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst index bd08e4f77ae4..a048a9f6b7b6 100644 --- a/Documentation/media/uapi/v4l/vidioc-create-bufs.rst +++ b/Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst @@ -1,11 +1,5 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: V4L .. _VIDIOC_CREATE_BUFS: @@ -18,24 +12,22 @@ Name VIDIOC_CREATE_BUFS - Create buffers for Memory Mapped or User Pointer or DMA Buffer I/O - Synopsis ======== -.. c:function:: int ioctl( int fd, VIDIOC_CREATE_BUFS, struct v4l2_create_buffers *argp ) - :name: VIDIOC_CREATE_BUFS +.. c:macro:: VIDIOC_CREATE_BUFS +``int ioctl(int fd, VIDIOC_CREATE_BUFS, struct v4l2_create_buffers *argp)`` Arguments ========= ``fd`` - File descriptor returned by :ref:`open() <func-open>`. + File descriptor returned by :c:func:`open()`. ``argp`` Pointer to struct :c:type:`v4l2_create_buffers`. - Description =========== @@ -78,10 +70,9 @@ the actual number allocated and the starting index in the ``count`` and the ``index`` fields respectively. On return ``count`` can be smaller than the number requested. - .. c:type:: v4l2_create_buffers -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| +.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.5cm}| .. flat-table:: struct v4l2_create_buffers :header-rows: 0 @@ -113,19 +104,24 @@ than the number requested. - Set by the driver. If 0, then the driver doesn't support capabilities. In that case all you know is that the driver is guaranteed to support ``V4L2_MEMORY_MMAP`` and *might* support - other :c:type:`v4l2_memory` types. It will not support any others + other :c:type:`v4l2_memory` types. It will not support any other capabilities. See :ref:`here <v4l2-buf-capabilities>` for a list of the capabilities. If you want to just query the capabilities without making any other changes, then set ``count`` to 0, ``memory`` to ``V4L2_MEMORY_MMAP`` and ``format.type`` to the buffer type. + * - __u32 - - ``reserved``\ [7] + - ``flags`` + - Specifies additional buffer management attributes. + See :ref:`memory-flags`. + + * - __u32 + - ``reserved``\ [6] - A place holder for future extensions. Drivers and applications must set the array to zero. - Return Value ============ |