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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Fri, 1 Mar 2024 11:50:58 -0500
From: Frank Li <Frank.li@....com>
To: Conor Dooley <conor@...nel.org>
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 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.