linux-kernel - Re: [PATCH v3 16/21] arm64: dts: mt8192: Add vcodec lat and core nodes

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Date:   Tue, 15 Mar 2022 15:39:08 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Allen-KH Cheng <allen-kh.cheng@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Cc:     Project_Global_Chrome_Upstream_Group@...iatek.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        Chen-Yu Tsai <wenst@...omium.org>,
        Ryder Lee <ryder.lee@...nel.org>,
        Hui Liu <hui.liu@...iatek.com>
Subject: Re: [PATCH v3 16/21] arm64: dts: mt8192: Add vcodec lat and core
 nodes

Il 04/03/22 14:08, 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>
> ---
>   arch/arm64/boot/dts/mediatek/mt8192.dtsi | 58 ++++++++++++++++++++++++
>   1 file changed, 58 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> index ac69033737bb..5fd1fed354d0 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> @@ -1285,6 +1285,64 @@
>   			power-domains = <&spm MT8192_POWER_DOMAIN_ISP2>;
>   		};
>   
> +		vcodec_dec: vcodec-dec@...00000 {
> +			compatible = "mediatek,mt8192-vcodec-dec";
> +			reg = <0 0x16000000 0 0x1000>;	/* VDEC_SYS */
> +			mediatek,scp = <&scp>;
> +			iommus = <&iommu0 M4U_PORT_L4_VDEC_MC_EXT>;

Hello Allen-KH,

please, use ranges whenever possible. Example:

			ranges = <0 0 0 0x16000000 0 0x26000>;

			vcodec-lat@...0 {
				reg = <0 0x1000 0 0x800>;
				.......

			};

			vcodec-core@...00 {
				reg = <0 0x25000 0 0x1000>;
				.......
			};

Thanks,
Angelo