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

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Date:	Fri, 1 Apr 2016 10:50:52 +0800
From:	PC Liao <pc.liao@...iatek.com>
To:	Mark Brown <broonie@...nel.org>
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

Hi Mark,

On Wed, 2016-03-30 at 00:07 +0800, Mark Brown wrote:
> On Tue, Mar 29, 2016 at 09:28:23PM +0800, PC Liao wrote:
> 
> > - mediatek,rt5650_i2s: I2S mode of rt5650
> > 0: Default setting. Playback and record path use same set of I2S.
> > Playback/Record path using same I2S clock connect from MT8173 I2S1 to
> > rt5650 I2S1.
> > 1: Playback and record path use different set of I2S. Playback path
> > connects from MT8173 I2S1 to rt5650 I2S1 and record path connects from
> > MT8173 I2S2 to rt5650 I2S2.
> 
> > Because we use codec ASRC function and need to initialize on different
> > setting about this parts:
> 
> This sort of arrangement is very common - it's often needed to get
> different sample rates for playback and capture.  Normally it'd be
> represented in the DT by having the two DAI links specified normally and
> then having the driver look at the DT to see what's connected to work
> out what mode to use.

Could you please suggest the reference driver about this?
Thanks!