From: Liam Girdwood <lrg@ti.com>
To: Craig McQueen <craig.mcqueen@beamcommunications.com>
Cc: "Alsa-devel@alsa-project.org" <Alsa-devel@alsa-project.org>,
Mark Brown <broonie@opensource.wolfsonmicro.com>
Subject: Re: Non-DMA ASoC driver
Date: Wed, 28 Nov 2012 10:08:33 +0000 [thread overview]
Message-ID: <50B5E2A1.1020101@ti.com> (raw)
In-Reply-To: <DB8F1B3EEF94C3439BFFE674EB05E3CC029C82CB@SIXPRD0211MB418.apcprd02.prod.outlook.com>
On 28/11/12 04:46, Craig McQueen wrote:
> I'm exploring hardware options for an audio interface for a Freescale i.MX28-based embedded Linux device. One option is to use a Synchronous Serial Port interface to connect in slave mode to an external CODEC. I have several doubts about the feasibility of this option, but for now, I have just one question:
>
> If we use this SSP, then we can't use DMA, but we would have to use interrupts for audio transfer. But I can't find any example code for a non-DMA based ASoC driver. Is it feasible to make a non-DMA based ASoC driver? How would it be implemented?
>
This has been done in sound/soc/fsl/imx-pcm-fiq.c and can be used as your
platform driver.
Regards
Liam
prev parent reply other threads:[~2012-11-28 10:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-28 4:46 Non-DMA ASoC driver Craig McQueen
2012-11-28 10:08 ` Liam Girdwood [this message]
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