linux-kernel - Re: [PATCH 10/10] arm64: dts: mt8195-cherry: Add secure mbox settings for vdosys

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Date:   Tue, 19 Sep 2023 12:54:05 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     "Jason-JH.Lin" <jason-jh.lin@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc:     Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org, linux-media@...r.kernel.org,
        linaro-mm-sig@...ts.linaro.org,
        Jason-ch Chen <jason-ch.chen@...iatek.com>,
        Johnson Wang <johnson.wang@...iatek.com>,
        Singo Chang <singo.chang@...iatek.com>,
        Nancy Lin <nancy.lin@...iatek.com>,
        Shawn Sung <shawn.sung@...iatek.com>,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH 10/10] arm64: dts: mt8195-cherry: Add secure mbox settings
 for vdosys

Il 19/09/23 05:03, Jason-JH.Lin ha scritto:
> Add a secure mailbox channel to support secure video path on
> vdosys0 and vdosys1.
> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 10 ++++++++++
>   1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> index 37a3e9de90ff..9b838b2cdb3e 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> @@ -1147,6 +1147,16 @@
>   	status = "okay";
>   };
>   
> +&vdosys0 {
> +	mboxes = <&gce0 0 CMDQ_THR_PRIO_4>,
> +		 <&gce0 8 CMDQ_THR_PRIO_4>; /* secure mbox */
> +};
> +
> +&vdosys1 {
> +	mboxes = <&gce0 1 CMDQ_THR_PRIO_4>,
> +		 <&gce0 9 CMDQ_THR_PRIO_4>; /* secure mbox */
> +};
> +

Is the secure mailbox number firmware dependant?
Otherwise this could go in mt8195.dtsi.

Regards,
Angelo

>   &xhci0 {
>   	status = "okay";
>