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| author | Sergey Senozhatsky <senozhatsky@chromium.org> | 2021-09-09 13:24:29 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-09-30 10:07:57 +0200 |
| commit | c0acf9cfeee061f041fab778dbdcb34b6ca5e2e7 (patch) | |
| tree | e30af680eb9ce6bfaa6bdae802905f7ab5ffe963 /sound/usb/media.h | |
| parent | media: videobuf2: add queue memory coherency parameter (diff) | |
| download | linux-c0acf9cfeee061f041fab778dbdcb34b6ca5e2e7.tar.xz linux-c0acf9cfeee061f041fab778dbdcb34b6ca5e2e7.zip | |
media: videobuf2: handle V4L2_MEMORY_FLAG_NON_COHERENT flag
This patch lets user-space request a non-coherent memory
allocation during CREATE_BUFS and REQBUFS ioctl calls.
= CREATE_BUFS
struct v4l2_create_buffers has seven 4-byte reserved areas,
so reserved[0] is renamed to ->flags. The struct, thus, now
has six reserved 4-byte regions.
= CREATE_BUFS32
struct v4l2_create_buffers32 has seven 4-byte reserved areas,
so reserved[0] is renamed to ->flags. The struct, thus, now
has six reserved 4-byte regions.
= REQBUFS
We use one byte of a 4 byte ->reserved[1] member of struct
v4l2_requestbuffers. The struct, thus, now has reserved 3 bytes.
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 'sound/usb/media.h')
0 files changed, 0 insertions, 0 deletions