linux-kernel - Re: [PATCH 3/4 v7] ASoC: dwc: Add PIO PCM extension

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Message-ID: <20160525101801.GT8206@sirena.org.uk>
Date:	Wed, 25 May 2016 11:18:01 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Jose Abreu <Jose.Abreu@...opsys.com>
Cc:	alsa-devel@...a-project.org,
	Carlos Palminha <CARLOS.PALMINHA@...opsys.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>, Rob Herring <robh@...nel.org>,
	Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
	linux-snps-arc@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4 v7] ASoC: dwc: Add PIO PCM extension

On Wed, May 25, 2016 at 11:11:47AM +0100, Jose Abreu wrote:

> I think I will take the second option. Something like this:
> "
>     ret = snd_dmaengine_pcm_register(...)
>     if (ret == -EPROBE_DEFER)
>         return ret;
>     else
>         pio_register(...);
> "?

Sure.  You should print a diagnostic if you fail to get the DMA, for any
real system it's going to be a bug.

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