linux-kernel - Re: [PATCH v10 2/3] dts: arm64: mt8183: add Mediatek MDP3 nodes

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Date:   Wed, 15 Dec 2021 11:15:01 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Moudy Ho <moudy.ho@...iatek.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Jernej Skrabec <jernej.skrabec@...l.net>
Cc:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Rob Landley <rob@...dley.net>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Alexandre Courbot <acourbot@...omium.org>, tfiga@...omium.org,
        drinkcat@...omium.org, pihsun@...omium.org, hsinyi@...gle.com,
        Maoguang Meng <maoguang.meng@...iatek.com>,
        daoyuan huang <daoyuan.huang@...iatek.com>,
        Ping-Hsun Wu <ping-hsun.wu@...iatek.com>,
        menghui.lin@...iatek.com, sj.huang@...iatek.com,
        allen-kh.cheng@...iatek.com, randy.wu@...iatek.com,
        jason-jh.lin@...iatek.com, roy-cw.yeh@...iatek.com,
        river.cheng@...iatek.com, srv_heupstream@...iatek.com
Subject: Re: [PATCH v10 2/3] dts: arm64: mt8183: add Mediatek MDP3 nodes

Il 02/12/21 07:27, Moudy Ho ha scritto:
> Add device nodes for Media Data Path 3 (MDP3) modules.
> 
> Signed-off-by: Moudy Ho <moudy.ho@...iatek.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt8183.dtsi | 115 ++++++++++++++++++++++-
>   1 file changed, 114 insertions(+), 1 deletion(-)
> 

Hello Moudy,
we have just detected an issue with this commit.


> diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> index ba4584faca5a..e4dc76b04438 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> @@ -1325,6 +1325,85 @@
>   			mediatek,gce-client-reg = <&gce SUBSYS_1400XXXX 0 0x1000>;
>   		};
>   
> +		mdp3_rdma0: mdp3_rdma0@...01000 {
> +			compatible = "mediatek,mt8183-mdp3",
> +				     "mediatek,mt8183-mdp3-rdma";
> +			mediatek,scp = <&scp>;
> +			mediatek,mdp3-id = <0>;
> +			mediatek,mdp3-comps = "mediatek,mt8183-mdp3-dl1",
> +					      "mediatek,mt8183-mdp3-dl2",
> +					      "mediatek,mt8183-mdp3-path1",
> +					      "mediatek,mt8183-mdp3-path2",
> +					      "mediatek,mt8183-mdp3-imgi",
> +					      "mediatek,mt8183-mdp3-exto";
> +			mediatek,mdp3-comp-ids = <0 1 0 1 0 1>;
> +			reg = <0 0x14001000 0 0x1000>,
> +			      <0 0x14000000 0 0x1000>,
> +			      <0 0x14005000 0 0x1000>,
> +			      <0 0x14006000 0 0x1000>,
> +			      <0 0x15020000 0 0x1000>;
> +			mediatek,gce-client-reg = <&gce SUBSYS_1400XXXX 0x1000 0x1000>,
> +						  <&gce SUBSYS_1400XXXX 0 0x1000>,
> +						  <&gce SUBSYS_1400XXXX 0x5000 0x1000>,
> +						  <&gce SUBSYS_1400XXXX 0x6000 0x1000>,
> +						  <&gce SUBSYS_1502XXXX 0 0x1000>;
> +			power-domains = <&spm MT8183_POWER_DOMAIN_DISP>;
> +			clocks = <&mmsys CLK_MM_MDP_RDMA0>,
> +				 <&mmsys CLK_MM_MDP_RSZ1>,
> +				 <&mmsys CLK_MM_MDP_DL_TXCK>,
> +				 <&mmsys CLK_MM_MDP_DL_RX>,
> +				 <&mmsys CLK_MM_IPU_DL_TXCK>,
> +				 <&mmsys CLK_MM_IPU_DL_RX>;
> +			iommus = <&iommu M4U_PORT_MDP_RDMA0>;
> +			mediatek,mmsys = <&mmsys>;
> +			mediatek,mm-mutex = <&mutex>;
> +			mediatek,mailbox-gce = <&gce>;
> +			mboxes = <&gce 20 CMDQ_THR_PRIO_LOWEST 0>,
> +				 <&gce 21 CMDQ_THR_PRIO_LOWEST 0>,
> +				 <&gce 22 CMDQ_THR_PRIO_LOWEST 0>,
> +				 <&gce 23 CMDQ_THR_PRIO_LOWEST 0>;

The gce mailbox node declares #mbox-cells = <2> and you're trying to use three
cells instead. Like that, the driver won't even probe.

Please fix this by removing the last cell here (remove the 0).

Thanks,
- Angelo