linux-kernel - Re: [RFC] sound: ASoC: multiple DAIs/codecs on single audio stream

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Message-ID: <20130417141321.GU13687@opensource.wolfsonmicro.com>
Date:	Wed, 17 Apr 2013 15:13:21 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	alsa-devel@...a-project.org, Russell King <linux@....linux.org.uk>,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] sound: ASoC: multiple DAIs/codecs on single audio stream

On Tue, Apr 16, 2013 at 07:45:08PM +0200, Sebastian Hesselbarth wrote:

> The controller has a dma controller for one playback buffer. It can
> play the stream to both I2S and SPDIF interfaces with independent mute.

> Now, for example, I have a board with i2s codec and spdif tx diode
> connected to the above controller:

> DMA (platform) -+-> I2S (dai) ----> I2S_Codec (codec)
>                 |
>                 +-> SPDIF (dai) --> SPDIF_TX (codec)

> Is there any way in the current ASoC API to have the above setup?

As discussed on IRC this is probably best represented using soc-pcm at
the minute.

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