linux-kernel - Re: [PATCH] ASoC: tegra: use dmaengine based dma driver

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Message-ID: <20120702164717.GH25093@opensource.wolfsonmicro.com>
Date:	Mon, 2 Jul 2012 17:47:18 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	Laxman Dewangan <ldewangan@...dia.com>,
	"tiwai@...e.de" <tiwai@...e.de>, "perex@...ex.cz" <perex@...ex.cz>,
	Stephen Warren <swarren@...dia.com>, "lrg@...com" <lrg@...com>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH] ASoC: tegra: use dmaengine based dma driver

On Mon, Jul 02, 2012 at 10:45:01AM -0600, Stephen Warren wrote:

> to work. No audio is heard, and aplay eventually exits with the
> following error message:

For values of eventually that will be about 10s by default.

> aplay: pcm_write:1603: write error: Input/output error

> I believe this means that the DMA simply isn't operating.

Yes, normally.

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