linux-kernel - Re: [PATCH v2 3/4] ASoC: dt-bindings: fsl-sai: allow only one dma-names

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Message-ID: <20240301-ending-resize-9ee4e1998f6c@spud>
Date: Fri, 1 Mar 2024 16:06:35 +0000
From: Conor Dooley <conor@...nel.org>
To: Frank Li <Frank.li@....com>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Shengjiu Wang <shengjiu.wang@....com>, linux-sound@...r.kernel.org,
	devicetree@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/4] ASoC: dt-bindings: fsl-sai: allow only one
 dma-names

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.

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