linux-kernel - Re: [PATCH 1/2] dma: pl330: improve pl330_tx

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Message-ID: <CAAgF-BeA+Es4K0Dvtm1+aQVpem8=MwYSdQs3Ta8J+khVvj7Zpg@mail.gmail.com>
Date:	Wed, 26 Nov 2014 15:30:32 +0530
From:	Padma Venkat <padma.kvr@...il.com>
To:	r.baldyga@...sung.com
Cc:	Vinod Koul <vinod.koul@...el.com>, dan.j.williams@...el.com,
	lars@...afoo.de, dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	l.czerwinski@...sung.com
Subject: Re: [PATCH 1/2] dma: pl330: improve pl330_tx_status() function

Hi Robert,

I tested your patches on exynos5420 peach-pit with audio playback and
got some underrun error.
I posted a similar patch in the below link.

https://patchwork.kernel.org/patch/5384551/

Please do review the same.

Thanks
Padma

> On 25.11.2014 13:25, Robert Baldyga wrote:
>> This patch adds possibility to read residue of DMA transfer. It's useful
>> when we want to know how many bytes have been transfered before we
>> terminate channel. It can take place, for example, on timeout interrupt.
>>
>> Signed-off-by: Lukasz Czerwinski <l.czerwinski@...sung.com>
>> Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
>> ---
>>  drivers/dma/pl330.c | 61
>> ++++++++++++++++++++++++++++++++++++++++++++++++++++-
>>  1 file changed, 60 insertions(+), 1 deletion(-)
>>
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