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Date: Fri, 1 Mar 2024 11:50:58 -0500
From: Frank Li <Frank.li@nxp.com>
To: Conor Dooley <conor@kernel.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Conor Dooley <conor+dt@kernel.org>, Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	Shengjiu Wang <shengjiu.wang@nxp.com>, linux-sound@vger.kernel.org,
	devicetree@vger.kernel.org, imx@lists.linux.dev,
	linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 3/4] ASoC: dt-bindings: fsl-sai: allow only one
 dma-names
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On Fri, Mar 01, 2024 at 04:06:35PM +0000, Conor Dooley wrote:
> On Thu, Feb 29, 2024 at 02:31:20PM -0500, Frank Li wrote:
> > On Thu, Feb 29, 2024 at 06:55:58PM +0000, Conor Dooley wrote:
> > > On Tue, Feb 27, 2024 at 03:54:11PM -0500, Frank Li wrote:
> > > > Some sai only connect one direction. So allow only "rx" or "tx" for
> > > > dma-names.
> > > 
> > > Which sai? Can you restrict this per compatible please, so that someone
> > > cannot add 2 dmas for ones where only the tx is supported.
> > 
> > SAI is exact the same. Only external connect one dma channel.
> 
> Right. The wording made it sound like some SAIs were capable of this and
> some were not, but what you actually mean is that all SAIs can sometimes
> be connected in only one direction.

IP is the same, just some instance only connect one direction dma. for
example there are 6 sai instance in SOC. sai0, ... sai4 have both rx and
tx. sai5 only connect tx.