linux-kernel - Re: [PATCH] ASoC: mediatek: Add second I2S on mt8173-rt5650 machine driver

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Date:	Wed, 6 Apr 2016 10:17:50 -0700
From:	Mark Brown <broonie@...nel.org>
To:	PC Liao <pc.liao@...iatek.com>
Cc:	"tiwai@...e.de" <tiwai@...e.de>,
	srv_heupstream <srv_heupstream@...iatek.com>,
	"linux-mediatek@...ts.infradead.org" 
	<linux-mediatek@...ts.infradead.org>,
	"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	Koro Chen (陳思翰) <koro.chen@...iatek.com>
Subject: Re: [PATCH] ASoC: mediatek: Add second I2S on mt8173-rt5650 machine
 driver

On Wed, Apr 06, 2016 at 09:58:25PM +0800, PC Liao wrote:
> On Sun, 2016-04-03 at 01:04 +0800, Mark Brown wrote:

> > Any driver that can identify an individual DAI within a device by using
> > sound-dai references, even simple-card does this.

> Thanks for suggestion.
> This machine driver is based on DPCM.
> Should I add BE DAI and use DAPM, then using ucm-config(mixer control)
> to control the path?
> Or, do I think the wrong direction?
> Thanks!

It sounds like the configuration is fixed in these systems and can't
be usefully varied at runtime?  If that's the case then there's no need
for a userspace control.

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