Re: [PATCHv7 10/15] v4l: vb2-dma-contig: add prepare/finish to dma-contig allocator

[Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>]

Hi Tomasz,

Thanks for the patch.

On Thursday 14 June 2012 15:37:44 Tomasz Stanislawski wrote:
> 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>

> ---
>  drivers/media/video/videobuf2-dma-contig.c |   24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/drivers/media/video/videobuf2-dma-contig.c
> b/drivers/media/video/videobuf2-dma-contig.c index 94f0874..f9286d7 100644
> --- a/drivers/media/video/videobuf2-dma-contig.c
> +++ b/drivers/media/video/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         */
>  /*********************************************/
> @@ -369,6 +391,8 @@ 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);

-- 
Regards,

Laurent Pinchart

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