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| author | David S. Miller <davem@davemloft.net> | 2020-10-06 02:33:26 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-10-06 03:40:01 +0200 |
| commit | 8b0308fe319b8002753ea66f8f940fb393792ddd (patch) | |
| tree | 4c5a80346308db8cac9ff0951bb10e892c2387ad /Documentation/userspace-api/media/v4l/buffer.rst | |
| parent | net: phy: marvell: Use phy_read_paged() instead of open coding it (diff) | |
| parent | Merge tag 'platform-drivers-x86-v5.9-2' of git://git.infradead.org/linux-plat... (diff) | |
| download | linux-8b0308fe319b8002753ea66f8f940fb393792ddd.tar.xz linux-8b0308fe319b8002753ea66f8f940fb393792ddd.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Rejecting non-native endian BTF overlapped with the addition
of support for it.
The rest were more simple overlapping changes, except the
renesas ravb binding update, which had to follow a file
move as well as a YAML conversion.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/userspace-api/media/v4l/buffer.rst')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/buffer.rst | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/Documentation/userspace-api/media/v4l/buffer.rst b/Documentation/userspace-api/media/v4l/buffer.rst index 57e752aaf414..2044ed13cd9d 100644 --- a/Documentation/userspace-api/media/v4l/buffer.rst +++ b/Documentation/userspace-api/media/v4l/buffer.rst @@ -701,23 +701,6 @@ Memory Consistency Flags :stub-columns: 0 :widths: 3 1 4 - * .. _`V4L2-FLAG-MEMORY-NON-CONSISTENT`: - - - ``V4L2_FLAG_MEMORY_NON_CONSISTENT`` - - 0x00000001 - - A buffer is allocated either in consistent (it will be automatically - coherent between the CPU and the bus) or non-consistent memory. The - latter can provide performance gains, for instance the CPU cache - sync/flush operations can be avoided if the buffer is accessed by the - corresponding device only and the CPU does not read/write to/from that - buffer. However, this requires extra care from the driver -- it must - guarantee memory consistency by issuing a cache flush/sync when - consistency is needed. If this flag is set V4L2 will attempt to - allocate the buffer in non-consistent memory. The flag takes effect - only if the buffer is used for :ref:`memory mapping <mmap>` I/O and the - queue reports the :ref:`V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS - <V4L2-BUF-CAP-SUPPORTS-MMAP-CACHE-HINTS>` capability. - .. c:type:: v4l2_memory enum v4l2_memory |