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
Date: Fri, 1 Mar 2024 11:46:20 -0500 [thread overview]
Message-ID: <ZeIGXEJ3l4tgjmxT@lizhi-Precision-Tower-5810> (raw)
In-Reply-To: <20240301-crudeness-resale-3c0a1228850d@spud>
On Fri, Mar 01, 2024 at 04:05:25PM +0000, Conor Dooley wrote:
> On Thu, Feb 29, 2024 at 02:38:24PM -0500, Frank Li wrote:
> > On Thu, Feb 29, 2024 at 06:57:29PM +0000, Conor Dooley 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.
> > > >
> > > > | dmas:
> > > > | minItems: 1
> > > > | items:
> > > > | - description: DMA controller phandle and request line for RX
> > > > | - description: DMA controller phandle and request line for TX
> > > >
> > > > The binding already allows only one, but it documents that the first dma
> > > > is always the RX dma, and that doesn't change with this patch..
> > >
> > > I said "doesn't change" - but I don't think you can change this
> > > trivially, as something could rely on the first dma being the rx one.
> > > You'd have to check that there is nothing using these using indices
> > > rather than names before making any changes here.
> >
> > Linux driver and dts with tx only work well. Only issue is dtb_check will
> > report error. I want to eliminate these DTB_CHECK warning.
>
> Linux is not the only user of these bindings, citing linux as your
> evidence here is only sufficient if no other users exist. Do they?
But, 'dmas' should be common property for all these bindings? I don't think
they use 'descriptions:' property, which should guide dts writer to write
dts file. actually words 'DMA controller phandle and request line' just
nonsense words. let 'regs', it'd better descript at 'reg-names' instead
of 'regs' if reg-names exist. Only meansful words is "RX" and "TX", which
already show at "dma-names".
>
> > And it also reasonable, only rx or tx for a special SAI.
> >
> > Can we remove 'description'? dmas should already descripted at common place
> > and 'RX' and 'TX' are listed at 'dma-names'
>
> Removing the description has the same problem. The existing binding has
> set a fixed order that you now want to make flexible.
Actually original set minItems: is 1, which means allow 1 channel. but
set items to force two channel.
Does it work
oneOf:
items:
- description: TX
- description: RX
items:
- description: TX
items:
- description: RX
>
> Thanks,
> Conor.
next prev parent reply other threads:[~2024-03-01 16:46 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-27 20:54 [PATCH v2 0/4] arm64: dts: imx8qxp add asrc and sai Frank Li
2024-02-27 20:54 ` [PATCH v2 1/4] ASoC: dt-bindings: fsl,imx-asrc/spdif: Add power-domains requirement Frank Li
2024-02-29 18:52 ` Conor Dooley
2024-02-27 20:54 ` [PATCH v2 2/4] ASoC: dt-bindings: fsl,imx-asrc: update max interrupt numbers Frank Li
2024-02-27 22:39 ` Rob Herring
2024-02-27 20:54 ` [PATCH v2 3/4] ASoC: dt-bindings: fsl-sai: allow only one dma-names Frank Li
2024-02-29 18:55 ` Conor Dooley
2024-02-29 18:57 ` Conor Dooley
2024-02-29 19:38 ` Frank Li
2024-03-01 16:05 ` Conor Dooley
2024-03-01 16:46 ` Frank Li [this message]
2024-03-01 17:07 ` Conor Dooley
2024-03-01 17:25 ` Frank Li
2024-03-04 20:13 ` Conor Dooley
2024-02-29 19:31 ` Frank Li
2024-03-01 16:06 ` Conor Dooley
2024-03-01 16:50 ` Frank Li
2024-02-27 20:54 ` [PATCH v2 4/4] arm64: dts: imx8qxp: add asrc[0,1], esai0, spdif[0,1] and sai[4,5] Frank Li
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