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[media] v4l: vb2-dma-contig: add prepare/finish to dma-contig allocator
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>
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@ -103,6 +103,28 @@ static unsigned int vb2_dc_num_users(void *buf_priv)
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return atomic_read(&buf->refcount);
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}
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static void vb2_dc_prepare(void *buf_priv)
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{
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struct vb2_dc_buf *buf = buf_priv;
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struct sg_table *sgt = buf->dma_sgt;
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if (!sgt)
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return;
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dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
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}
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static void vb2_dc_finish(void *buf_priv)
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{
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struct vb2_dc_buf *buf = buf_priv;
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struct sg_table *sgt = buf->dma_sgt;
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if (!sgt)
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return;
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dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
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}
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/*********************************************/
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/* callbacks for MMAP buffers */
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/*********************************************/
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@ -366,6 +388,8 @@ const struct vb2_mem_ops vb2_dma_contig_memops = {
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.mmap = vb2_dc_mmap,
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.get_userptr = vb2_dc_get_userptr,
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.put_userptr = vb2_dc_put_userptr,
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.prepare = vb2_dc_prepare,
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.finish = vb2_dc_finish,
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.num_users = vb2_dc_num_users,
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};
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EXPORT_SYMBOL_GPL(vb2_dma_contig_memops);
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