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From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: vinod.koul@intel.com, linux@arm.linux.org.uk, tony@atomide.com,
	dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	dan.j.williams@intel.com
Subject: Re: [PATCH] dmaengine: omap-dma: Add support for memcpy
Date: Tue, 08 Sep 2015 14:24:49 +0300	[thread overview]
Message-ID: <3187470.tKXzQaPa1m@avalon> (raw)
In-Reply-To: <1429688069-31765-1-git-send-email-peter.ujfalusi@ti.com>

Hi Peter,

Thank you for the patch.

While trying to port the omap_vout driver to the DMA engine API I noticed that 
the driver makes use of double-indexed transfers, which are not supported by 
the omap-dma driver. I haven't checked in details what would be required, but 
the interleaved API might be a good candidate for this. Do you have any plan 
to add support for double-indexed transfers to the omap-dma driver ?

On Wednesday 22 April 2015 10:34:29 Peter Ujfalusi wrote:
> The sDMA controller is capable of performing memory copy operation. It need
> to be configured to software triggered mode and without HW synchronization.
> The sDMA can copy data which is aligned to 8, 16 or 32 bits.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
> ---
>  drivers/dma/omap-dma.c | 51 +++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 49 insertions(+), 2 deletions(-)

-- 
Regards,

Laurent Pinchart

WARNING: multiple messages have this Message-ID (diff)
From: laurent.pinchart@ideasonboard.com (Laurent Pinchart)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] dmaengine: omap-dma: Add support for memcpy
Date: Tue, 08 Sep 2015 14:24:49 +0300	[thread overview]
Message-ID: <3187470.tKXzQaPa1m@avalon> (raw)
In-Reply-To: <1429688069-31765-1-git-send-email-peter.ujfalusi@ti.com>

Hi Peter,

Thank you for the patch.

While trying to port the omap_vout driver to the DMA engine API I noticed that 
the driver makes use of double-indexed transfers, which are not supported by 
the omap-dma driver. I haven't checked in details what would be required, but 
the interleaved API might be a good candidate for this. Do you have any plan 
to add support for double-indexed transfers to the omap-dma driver ?

On Wednesday 22 April 2015 10:34:29 Peter Ujfalusi wrote:
> The sDMA controller is capable of performing memory copy operation. It need
> to be configured to software triggered mode and without HW synchronization.
> The sDMA can copy data which is aligned to 8, 16 or 32 bits.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
> ---
>  drivers/dma/omap-dma.c | 51 +++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 49 insertions(+), 2 deletions(-)

-- 
Regards,

Laurent Pinchart

  parent reply	other threads:[~2015-09-08 11:24 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-22  7:34 [PATCH] dmaengine: omap-dma: Add support for memcpy Peter Ujfalusi
2015-04-22  7:34 ` Peter Ujfalusi
2015-04-22  7:34 ` Peter Ujfalusi
2015-05-04  8:35 ` Vinod Koul
2015-05-04  8:35   ` Vinod Koul
2015-09-08 11:24 ` Laurent Pinchart [this message]
2015-09-08 11:24   ` Laurent Pinchart
2015-09-08 12:25   ` Peter Ujfalusi
2015-09-08 12:25     ` Peter Ujfalusi
2015-09-08 12:25     ` Peter Ujfalusi

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