linux-kernel - Re: [PATCH v2 1/2] DW DMAC: enable memory-to-memory transfers support

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Message-ID: <1479491218.22212.37.camel@linux.intel.com>
Date:   Fri, 18 Nov 2016 19:46:58 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
        devicetree@...r.kernel.org
Cc:     robh+dt@...nel.org, mark.rutland@....com,
        linux-kernel@...r.kernel.org, vinod.koul@...el.com,
        dmaengine@...r.kernel.org, linux-snps-arc@...ts.infradead.org
Subject: Re: [PATCH v2 1/2] DW DMAC: enable memory-to-memory transfers
 support

On Fri, 2016-11-18 at 19:53 +0300, Eugeniy Paltsev wrote:
> All known devices, which use DT for configuration, support
> memory-to-memory transfers. So enable it by default, if we read
> configuration from DT.
> 

Acked-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
> ---
>  drivers/dma/dw/platform.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c
> index 5bda0eb..aa7a5c1 100644
> --- a/drivers/dma/dw/platform.c
> +++ b/drivers/dma/dw/platform.c
> @@ -129,6 +129,12 @@ dw_dma_parse_dt(struct platform_device *pdev)
>  	if (of_property_read_bool(np, "is_private"))
>  		pdata->is_private = true;
>  
> +	/*
> +	 * All known devices, which use DT for configuration, support
> +	 * memory-to-memory transfers. So enable it by default.
> +	 */
> +	pdata->is_memcpy = true;
> +
>  	if (!of_property_read_u32(np, "chan_allocation_order", &tmp))
>  		pdata->chan_allocation_order = (unsigned char)tmp;
>  

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy