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[media] v4l: vb2-dma-contig: add prepare/finish to dma-contig allocator

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Add prepare/finish callbacks to vb2-dma-contig allocator.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Marek Szyprowski 2012-06-14 10:37:44 -03:00 committed by Mauro Carvalho Chehab
parent 3e0c2f2046
commit 199d101efd
1 changed files with 24 additions and 0 deletions
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24
drivers/media/v4l2-core/videobuf2-dma-contig.c
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@ -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);