diff options
| author | Sergey Senozhatsky <senozhatsky@chromium.org> | 2020-05-14 18:01:53 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-06-23 13:40:35 +0200 |
| commit | 62a4cd0130f3936e431d5c8495af07edc9e1363d (patch) | |
| tree | 1ed3a7d5b6ccbdfe6f97cc3cd23f649e40577ed4 /Documentation/admin-guide/media | |
| parent | 2ff99ca4bc30895f7e061f1fc0e510f19bd032bb (diff) | |
media: vivid: add cache_hints module param
Add a cache_hints module param to control per-queue user space cache
hints support.
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 'Documentation/admin-guide/media')
| -rw-r--r-- | Documentation/admin-guide/media/vivid.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/admin-guide/media/vivid.rst b/Documentation/admin-guide/media/vivid.rst index 52e57b773f07..6d7175f96f74 100644 --- a/Documentation/admin-guide/media/vivid.rst +++ b/Documentation/admin-guide/media/vivid.rst @@ -293,6 +293,15 @@ all configurable using the following module options: - 0: vmalloc - 1: dma-contig +- cache_hints: + + specifies if the device should set queues' user-space cache and memory + consistency hint capability (V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS). + The hints are valid only when using MMAP streaming I/O. Default is 0. + + - 0: forbid hints + - 1: allow hints + Taken together, all these module options allow you to precisely customize the driver behavior and test your application with all sorts of permutations. It is also very suitable to emulate hardware that is not yet available, e.g. |