From: joelf@ti.com (Joel Fernandes)
To: linux-arm-kernel@lists.infradead.org
Subject: [patch 5/6] edma: Make reading the position of active channels work
Date: Fri, 18 Apr 2014 11:40:12 -0500 [thread overview]
Message-ID: <5351556C.7000807@ti.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1404181123150.22697@ionos.tec.linutronix.de>
On 04/18/2014 04:24 AM, Thomas Gleixner wrote:
> On Fri, 18 Apr 2014, Thomas Gleixner wrote:
>> On Thu, 17 Apr 2014, Joel Fernandes wrote:
>>> Here's a thread that discusses it and the end conclusion is that it
>>> should be fine (Kyle Kastile is one of the EDMA hardware designers).
>>> http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/99/t/66011.aspx
>>
>> Gah, right I saw the issues with the original code, which does a
>> memcpy_fromio which copies byte by byte. Did not think about retrying
>> with the edma_read() based one.
>
> Actually I did expect memcpy_fromio to be more clever. But you are
> right, using the 32bit wide read works like a charm.
Cool, glad it does :)
regards,
-Joel
next prev parent reply other threads:[~2014-04-18 16:40 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-17 14:40 [patch 0/6] dma: edma: Provide granular residue accounting Thomas Gleixner
2014-04-17 14:40 ` [patch 1/6] dma: edma: Sanitize residue reporting Thomas Gleixner
2014-04-18 0:02 ` Joel Fernandes
2014-04-17 14:40 ` [patch 2/6] dma: edma: Check the current decriptor first in tx_status() Thomas Gleixner
2014-04-17 14:40 ` [patch 3/6] dma: edma: Create private pset struct Thomas Gleixner
2014-04-17 23:56 ` Joel Fernandes
2014-04-17 14:40 ` [patch 4/6] dma: edma: Store transfer data in edma_desc and edma_pset Thomas Gleixner
2014-04-17 14:40 ` [patch 5/6] edma: Make reading the position of active channels work Thomas Gleixner
2014-04-18 0:47 ` Joel Fernandes
2014-04-18 1:02 ` Joel Fernandes
2014-04-18 6:40 ` Thomas Gleixner
2014-04-18 9:24 ` Thomas Gleixner
2014-04-18 16:40 ` Joel Fernandes [this message]
2014-04-17 14:40 ` [patch 6/6] dma: edma: Provide granular accounting Thomas Gleixner
2014-04-18 0:45 ` Joel Fernandes
2014-04-18 7:03 ` Thomas Gleixner
2014-04-18 16:22 ` Joel Fernandes
2014-04-17 20:07 ` [patch 0/6] dma: edma: Provide granular residue accounting Russell King - ARM Linux
2014-04-17 20:31 ` Thomas Gleixner
2014-04-17 20:38 ` Russell King - ARM Linux
2014-04-17 21:14 ` Thomas Gleixner
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