linux-kernel - Re: [PATCH] dt-bindings: media: mtk-vcodec: Adds encoder power domain property

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Message-ID: <693edb35a45abe66e7eae378af6e778eebe01171.camel@mediatek.com>
Date:   Wed, 27 Apr 2022 10:55:35 +0800
From:   Irui Wang <irui.wang@...iatek.com>
To:     Rob Herring <robh@...nel.org>
CC:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "Yunfei Dong" <yunfei.dong@...iatek.com>,
        Maoguang Meng <maoguang.meng@...iatek.com>,
        Longfei Wang <longfei.wang@...iatek.com>,
        <allen-kh.cheng@...iatek.com>, <linux-media@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH] dt-bindings: media: mtk-vcodec: Adds encoder power
 domain property

Dear Rob,

Thanks for reviewing.

On Tue, 2022-04-26 at 15:37 -0500, Rob Herring wrote:
> On Wed, Apr 20, 2022 at 03:34:39PM +0800, Irui Wang wrote:
> > Adds encoder power domain property
> 
> Why? You can't add new, required properties as that breaks
> compatibility 
> with existing DTs.
We will use the "power-domains" property in new DTs, and we will get a
"make dtbs_check" warning if we don't add the "power-domains" in yaml,
so we add it, but should not be a "required property", we will send a
new version for it.

And another series patch will fix the "dtbs_check"(mediatek,larb) you
mentioned before:
https://patchwork.kernel.org/project/linux-mediatek/list/?series=633993

Thanks
Best Regards

> 
> > 
> > Signed-off-by: Irui Wang <irui.wang@...iatek.com>
> > ---
> >  .../devicetree/bindings/media/mediatek,vcodec-encoder.yaml | 7
> > +++++++
> >  1 file changed, 7 insertions(+)
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/media/mediatek,vcodec-
> > encoder.yaml
> > b/Documentation/devicetree/bindings/media/mediatek,vcodec-
> > encoder.yaml
> > index deb5b657a2d5..3c069c965992 100644
> > --- a/Documentation/devicetree/bindings/media/mediatek,vcodec-
> > encoder.yaml
> > +++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-
> > encoder.yaml
> > @@ -41,6 +41,9 @@ properties:
> >  
> >    assigned-clock-parents: true
> >  
> > +  power-domains:
> > +    maxItems: 1
> > +
> >    iommus:
> >      minItems: 1
> >      maxItems: 32
> > @@ -72,6 +75,7 @@ required:
> >    - iommus
> >    - assigned-clocks
> >    - assigned-clock-parents
> > +  - power-domains
> >  
> >  allOf:
> >    - if:
> > @@ -132,6 +136,7 @@ examples:
> >      #include <dt-bindings/clock/mt8173-clk.h>
> >      #include <dt-bindings/memory/mt8173-larb-port.h>
> >      #include <dt-bindings/interrupt-controller/irq.h>
> > +    #include <dt-bindings/power/mt8173-power.h>
> >  
> >      vcodec_enc_avc: vcodec@...02000 {
> >        compatible = "mediatek,mt8173-vcodec-enc";
> > @@ -153,6 +158,7 @@ examples:
> >        clock-names = "venc_sel";
> >        assigned-clocks = <&topckgen CLK_TOP_VENC_SEL>;
> >        assigned-clock-parents = <&topckgen CLK_TOP_VCODECPLL>;
> > +      power-domains = <&scpsys MT8173_POWER_DOMAIN_VENC>;
> >      };
> >  
> >      vcodec_enc_vp8: vcodec@...02000 {
> > @@ -173,4 +179,5 @@ examples:
> >        clock-names = "venc_lt_sel";
> >        assigned-clocks = <&topckgen CLK_TOP_VENC_LT_SEL>;
> >        assigned-clock-parents = <&topckgen
> > CLK_TOP_VCODECPLL_370P5>;
> > +      power-domains = <&scpsys MT8173_POWER_DOMAIN_VENC_LT>;
> >      };
> > -- 
> > 2.18.0
> > 
> >