@@ -100,8 +100,7 @@ static void vb2_dc_prepare(void *buf_priv)
struct vb2_dc_buf *buf = buf_priv;
struct sg_table *sgt = buf->dma_sgt;
- /* DMABUF exporter will flush the cache for us */
- if (!sgt || buf->db_attach)
+ if (!sgt)
return;
dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->orig_nents,
@@ -113,8 +112,7 @@ static void vb2_dc_finish(void *buf_priv)
struct vb2_dc_buf *buf = buf_priv;
struct sg_table *sgt = buf->dma_sgt;
- /* DMABUF exporter will flush the cache for us */
- if (!sgt || buf->db_attach)
+ if (!sgt)
return;
dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->orig_nents, buf->dma_dir);
@@ -204,10 +204,6 @@ static void vb2_dma_sg_prepare(void *buf_priv)
struct vb2_dma_sg_buf *buf = buf_priv;
struct sg_table *sgt = buf->dma_sgt;
- /* DMABUF exporter will flush the cache for us */
- if (buf->db_attach)
- return;
-
dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->orig_nents,
buf->dma_dir);
}
@@ -217,10 +213,6 @@ static void vb2_dma_sg_finish(void *buf_priv)
struct vb2_dma_sg_buf *buf = buf_priv;
struct sg_table *sgt = buf->dma_sgt;
- /* DMABUF exporter will flush the cache for us */
- if (buf->db_attach)
- return;
-
dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->orig_nents, buf->dma_dir);
}
We moved cache management decision making to the upper layer and rely on buffer's need_cache_sync flags and videobuf2 core. If the upper layer (core) has decided to invoke ->prepare() or ->finish() then we must sync. For DMABUF ->need_cache_sync_on_prepare and ->need_cache_sync_on_flush are always false so videobuf core does not call ->prepare() and ->finish() on such buffers. Additionally, scratch the DMABUF comment. Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org> --- drivers/media/common/videobuf2/videobuf2-dma-contig.c | 6 ++---- drivers/media/common/videobuf2/videobuf2-dma-sg.c | 8 -------- 2 files changed, 2 insertions(+), 12 deletions(-)