linux-kernel - Re: [PATCH 1/9] ASoC: meson: gx-card: fix sound-dai dt schema

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Date:   Fri, 28 Feb 2020 09:48:06 -0600
From:   Rob Herring <robh@...nel.org>
To:     Jerome Brunet <jbrunet@...libre.com>
Cc:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        Kevin Hilman <khilman@...libre.com>
Subject: Re: [PATCH 1/9] ASoC: meson: gx-card: fix sound-dai dt schema

On Mon, Feb 24, 2020 at 03:58:13PM +0100, Jerome Brunet wrote:
> There is a fair amount of warnings when running 'make dtbs_check' with
> amlogic,gx-sound-card.yaml.
> 
> Ex:
> arch/arm64/boot/dts/amlogic/meson-gxm-q200.dt.yaml: sound: dai-link-0:sound-dai:0:1: missing phandle tag in 0
> arch/arm64/boot/dts/amlogic/meson-gxm-q200.dt.yaml: sound: dai-link-0:sound-dai:0:2: missing phandle tag in 0
> arch/arm64/boot/dts/amlogic/meson-gxm-q200.dt.yaml: sound: dai-link-0:sound-dai:0: [66, 0, 0] is too long
> 
> The reason is that the sound-dai phandle provided has cells, and in such
> case the schema should use 'phandle-array' instead of 'phandle', even if
> the property expects a single phandle.
> 
> Fixes: fd00366b8e41 ("ASoC: meson: gx: add sound card dt-binding documentation")
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
> ---
>  Hi Mark,
> 
>  The statement above is based on this LKML discussion I found:
>  https://lkml.org/lkml/2019/9/30/382
> 
>  To be honest, I don't really get why the consumer should know whether
>  the phandle will have cells or not. AFAIK, the consumer does not care
>  about this ...

Yeah, I think another type definition is needed here to distinguish 
between a single phandle+args and an array of phandle+args.

In any case,

Acked-by: Rob Herring <robh@...nel.org>

> 
>  .../devicetree/bindings/sound/amlogic,gx-sound-card.yaml      | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)