linux-kernel - Re: [PATCH 7/7] ASoC: dt-bindings: mediatek,mt8188-afe: add audio properties

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Message-ID: <3fe703c1279bf4d25a890b63c23a4bc97abd4198.camel@mediatek.com>
Date:   Tue, 18 Apr 2023 10:23:41 +0000
From:   Trevor Wu (吳文良) <Trevor.Wu@...iatek.com>
To:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski@...aro.org" <krzysztof.kozlowski@...aro.org>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "perex@...ex.cz" <perex@...ex.cz>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 7/7] ASoC: dt-bindings: mediatek,mt8188-afe: add audio
 properties

On Mon, 2023-04-17 at 09:55 +0200, AngeloGioacchino Del Regno wrote:
> Il 17/04/23 04:44, Trevor Wu (吳文良) ha scritto:
> > On Sat, 2023-04-15 at 11:00 +0200, Krzysztof Kozlowski wrote:
> > > 
> > > On 13/04/2023 12:47, Trevor Wu wrote:
> > > > Assign top_a1sys_hp clock to 26M, and add apll1_d4 to clocks
> > > > for
> > > > switching
> > > > the parent of top_a1sys_hp dynamically
> > > > On the other hand, "mediatek,infracfg" is included for bus
> > > > protection.
> > > > 
> > > > Signed-off-by: Trevor Wu <trevor.wu@...iatek.com>
> > > > ---
> > > >   .../bindings/sound/mediatek,mt8188-afe.yaml    | 18
> > > > ++++++++++++++++++
> > > >   1 file changed, 18 insertions(+)
> > > > 
> > > > diff --git
> > > > a/Documentation/devicetree/bindings/sound/mediatek,mt8188-
> > > > afe.yaml
> > > > b/Documentation/devicetree/bindings/sound/mediatek,mt8188-
> > > > afe.yaml
> > > > index 82ccb32f08f2..03301d5082f3 100644
> > > > --- a/Documentation/devicetree/bindings/sound/mediatek,mt8188-
> > > > afe.yaml
> > > > +++ b/Documentation/devicetree/bindings/sound/mediatek,mt8188-
> > > > afe.yaml
> > > > @@ -29,6 +29,10 @@ properties:
> > > >       $ref: /schemas/types.yaml#/definitions/phandle
> > > >       description: The phandle of the mediatek topckgen
> > > > controller
> > > > 
> > > > +  mediatek,infracfg:
> > > > +    $ref: /schemas/types.yaml#/definitions/phandle
> > > > +    description: The phandle of the mediatek infracfg
> > > > controller
> > > > +
> > > >     power-domains:
> > > >       maxItems: 1
> > > > 
> > > > @@ -37,6 +41,7 @@ properties:
> > > >         - description: 26M clock
> > > >         - description: audio pll1 clock
> > > >         - description: audio pll2 clock
> > > > +      - description: audio pll1 divide 4
> > > >         - description: clock divider for i2si1_mck
> > > >         - description: clock divider for i2si2_mck
> > > >         - description: clock divider for i2so1_mck
> > > > @@ -58,6 +63,7 @@ properties:
> > > >         - const: clk26m
> > > >         - const: apll1
> > > >         - const: apll2
> > > > +      - const: apll1_d4
> > > 
> > > Why do you add clocks in the middle? The order is strict, so you
> > > just
> > > broke all DTS.
> > > 
> > 
> > In DTS file, I only need to make sure that the order in clocks
> > should
> > be the same as clock-names, so I misunderstood that I can add the
> > clock
> > in the middle based on the clock type.
> > 
> > Sorry, I didn't know the order is strict. I will move the new clock
> > to
> > the last one in v2.
> > 
> 
> Actually, doing that is borderline-ok... there's no devicetree for
> MT8188
> upstream, so that's not breaking anything at all.
> In any case, I agree that you should generally avoid doing that but I
> think
> that in this specific case it's fine; I'm not a devicetree maintainer
> though.
> 
> P.S.: Trevor, next time please make reviewers aware of the fact that
> no 8188
>        devicetree is present upstream!
> 
Got it. Thanks.


Hi krzysztof,

Because there is no upstream mt8188 DTS, should I move the new clock to
the end of clock list?

If I move "apll1_d4" to the end of the list at binding file, when I
upstream the devicetree node existing clocks and clock-names properties
, should I follow the sequence defined in dt-bindings or can I have a
new sequence based on the clock type or alphabet?

Thanks,
Trevor