linux-kernel - Re: [PATCH v4 19/22] arm64: dts: mt8192: Add the mmsys reset bit to reset the dsi0

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Message-ID: <a57af792-1eef-297c-176e-194757f3acc1@collabora.com>
Date:   Fri, 25 Mar 2022 14:55:11 +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 v4 19/22] arm64: dts: mt8192: Add the mmsys reset bit to
 reset the dsi0

Il 18/03/22 15:45, Allen-KH Cheng ha scritto:
> Reset the DSI hardware is needed to prevent different settings between
> the bootloader and the kernel.
> 
> Signed-off-by: Allen-KH Cheng <allen-kh.cheng@...iatek.com>
> Acked-by: Rob Herring <robh@...nel.org>
> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>

Note: since there were some mtk-mmsys.c updates in the meanwhile, this patch
requires [1] to be merged in order to work correctly.

Aside from that:

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>


[1]: 
https://patchwork.kernel.org/project/linux-mediatek/patch/20220323091932.10648-1-angelogioacchino.delregno@collabora.com/

> ---
>   include/dt-bindings/reset/mt8192-resets.h | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/include/dt-bindings/reset/mt8192-resets.h b/include/dt-bindings/reset/mt8192-resets.h
> index be9a7ca245b9..764ca9910fa9 100644
> --- a/include/dt-bindings/reset/mt8192-resets.h
> +++ b/include/dt-bindings/reset/mt8192-resets.h
> @@ -27,4 +27,7 @@
>   
>   #define MT8192_TOPRGU_SW_RST_NUM				23
>   
> +/* MMSYS resets */
> +#define MT8192_MMSYS_SW0_RST_B_DISP_DSI0			15
> +
>   #endif  /* _DT_BINDINGS_RESET_CONTROLLER_MT8192 */