From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Add prepare/finish callbacks to vb2-dma-contig allocator.
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Acked-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/v4l2-core/videobuf2-dma-contig.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c
index 8486e06..494a824 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
@@ -103,6 +103,28 @@ static unsigned int vb2_dc_num_users(void *buf_priv)
return atomic_read(&buf->refcount);
}
+static void vb2_dc_prepare(void *buf_priv)
+{
+ struct vb2_dc_buf *buf = buf_priv;
+ struct sg_table *sgt = buf->dma_sgt;
+
+ if (!sgt)
+ return;
+
+ dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
+}
+
+static void vb2_dc_finish(void *buf_priv)
+{
+ struct vb2_dc_buf *buf = buf_priv;
+ struct sg_table *sgt = buf->dma_sgt;
+
+ if (!sgt)
+ return;
+
+ dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
+}
+
/*********************************************/
/* callbacks for MMAP buffers */
/*********************************************/
@@ -366,6 +388,8 @@ const struct vb2_mem_ops vb2_dma_contig_memops = {
.mmap = vb2_dc_mmap,
.get_userptr = vb2_dc_get_userptr,
.put_userptr = vb2_dc_put_userptr,
+ .prepare = vb2_dc_prepare,
+ .finish = vb2_dc_finish,
.num_users = vb2_dc_num_users,
};
EXPORT_SYMBOL_GPL(vb2_dma_contig_memops);
--
1.7.9.5
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