linux-kernel - Re: [alsa-devel] [PATCH] ASoC: atmel-pcm-dma: increase buffer_bytes

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Message-ID: <551A4F32.10608@metafoo.de>
Date:	Tue, 31 Mar 2015 09:39:30 +0200
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Mark Brown <broonie@...nel.org>,
	Bo Shen <voice.shen@...el.com>,
	Nicolas Ferre <nicolas.ferre@...el.com>
CC:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [alsa-devel] [PATCH] ASoC: atmel-pcm-dma: increase buffer_bytes_max

On 03/30/2015 09:40 PM, Alexandre Belloni wrote:
> atmel-pcm-dma is not limited to a buffer size of 64kB like atmel-pcm-pdc.
> Increase buffer_bytes_max to 512kB to allow for higher bit rates (i.e. 32bps at
> 192kHz) to work correctly. By default, keep the prealloc at 64kB.

Patch per se looks good. But can you test if it works to just throw 
atmel_pcm_dma_hardware away completely and rely on the dmaengine PCM driver 
getting the capabilities directly from the DMA driver. Since the DMA driver 
now reports its capabilities I think it should work, and if it does that's 
the preferred solution.

- Lars
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