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| author | Sergey Senozhatsky <senozhatsky@chromium.org> | 2020-05-14 18:01:43 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-06-23 13:28:17 +0200 |
| commit | ac53503ee38a1ffbc47c7cca6cbfc48ba9c65c5e (patch) | |
| tree | b7ecc13ff0ade9fd511d5f7a788237cb0f126a00 /drivers/media/common/videobuf2/videobuf2-core.c | |
| parent | f5f5fa73fbfb9f346f1b5f37ebf343bae6ef6361 (diff) | |
| download | linux-ac53503ee38a1ffbc47c7cca6cbfc48ba9c65c5e.tar.bz2 | |
media: videobuf2: add V4L2_FLAG_MEMORY_NON_CONSISTENT flag
By setting or clearing V4L2_FLAG_MEMORY_NON_CONSISTENT flag
user-space should be able to set or clear queue's NON_CONSISTENT
->dma_attrs. Queue's ->dma_attrs are passed to the underlying
allocator in __vb2_buf_mem_alloc(), so thus user-space is able
to request vb2 buffer's memory to be either consistent (coherent)
or non-consistent.
The patch set also adds a corresponding capability flag:
fill_buf_caps() reports V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS
when queue supports user-space cache management hints. Note,
however, that MMAP_CACHE_HINTS capability only valid when the
queue is used for memory MMAP-ed streaming I/O.
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/common/videobuf2/videobuf2-core.c')
0 files changed, 0 insertions, 0 deletions