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media: videobuf2: do not sync caches when we are allowed not to 

Skip ->prepare() or/and ->finish() cache synchronisation if
user-space requested us to do so (or when queue dma direction
permits us to skip cache syncs).

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>
This commit is contained in:
Sergey Senozhatsky 2020-05-14 18:01:47 +02:00 committed by Mauro Carvalho Chehab
parent 38a417e88a
commit dcf3bfe7c7
1 changed files with 10 additions and 4 deletions
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14
drivers/media/common/videobuf2/videobuf2-core.c
View File

@ -304,8 +304,11 @@ static void __vb2_buf_mem_prepare(struct vb2_buffer *vb)
{
unsigned int plane;
for (plane = 0; plane < vb->num_planes; ++plane)
call_void_memop(vb, prepare, vb->planes[plane].mem_priv);
if (vb->need_cache_sync_on_prepare) {
for (plane = 0; plane < vb->num_planes; ++plane)
call_void_memop(vb, prepare,
vb->planes[plane].mem_priv);
}
vb->synced = 1;
}
@ -317,8 +320,11 @@ static void __vb2_buf_mem_finish(struct vb2_buffer *vb)
{
unsigned int plane;
for (plane = 0; plane < vb->num_planes; ++plane)
call_void_memop(vb, finish, vb->planes[plane].mem_priv);
if (vb->need_cache_sync_on_finish) {
for (plane = 0; plane < vb->num_planes; ++plane)
call_void_memop(vb, finish,
vb->planes[plane].mem_priv);
}
vb->synced = 0;
}