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Commit 199d101e authored by Marek Szyprowski's avatar Marek Szyprowski Committed by Mauro Carvalho Chehab
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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: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Tested-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 3e0c2f20

drivers/media/v4l2-core/videobuf2-dma-contig.c

+24 −0
Original line number Diff line number Diff line
@@ -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);