linux-kernel - Re: [PATCH v3 2/2] arm64: dts: mt8192: Add vcodec lat and core nodes

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Date:   Fri, 30 Sep 2022 10:50:46 +0000
From:   Allen-KH Cheng (程冠勳) 
        <Allen-KH.Cheng@...iatek.com>
To:     "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "krzysztof.kozlowski@...aro.org" <krzysztof.kozlowski@...aro.org>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v3 2/2] arm64: dts: mt8192: Add vcodec lat and core nodes

Hi Angelo,

On Fri, 2022-09-30 at 10:37 +0200, AngeloGioacchino Del Regno wrote:
> Il 29/09/22 15:13, Allen-KH Cheng ha scritto:
> > Add vcodec lat and core nodes for mt8192 SoC.
> > 
> > Signed-off-by: Allen-KH Cheng <allen-kh.cheng@...iatek.com>
> > Tested-by: Chen-Yu Tsai <wenst@...omium.org>
> > ---
> >   arch/arm64/boot/dts/mediatek/mt8192.dtsi | 60
> > ++++++++++++++++++++++++
> >   1 file changed, 60 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > index 6b20376191a7..fd3c3aaeadba 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > @@ -1449,6 +1449,66 @@
> >   			power-domains = <&spm
> > MT8192_POWER_DOMAIN_ISP2>;
> >   		};
> >   
> > +		vcodec_dec: video-codec@...00000 {
> > +			compatible = "mediatek,mt8192-vcodec-dec";
> > +			reg = <0 0x16000000 0 0x1000>;
> > +			mediatek,scp = <&scp>;
> > +			iommus = <&iommu0 M4U_PORT_L4_VDEC_MC_EXT>;
> > +			dma-ranges = <0x1 0x0 0x0 0x40000000 0x0
> > 0xfff00000>;
> > +			#address-cells = <2>;
> > +			#size-cells = <2>;
> > +			ranges = <0 0 0 0x16000000 0 0x26000>;
> > +
> > +			vcodec_lat: video-codec-lat@...00 {
> 
> There's only one more thing: why do we need the `vcodec_lat:` and
> `vcodec_core:`
> phandles here?
> 
> Platforms that do not support the vcodec can simply set `status =
> disabled;` on
> `vcodec_dec`... as it doesn't make real sense to disable only LAT or
> only CORE.
> 
> Please drop these two, after which:
> 
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@...labora.com>

It makes sense.
I'll update in the following version.

Thanks,
Allen
> 
>