linux-kernel - Re: [PATCH v3 2/2] dt-bindings: mediatek: add force_dsi_end_without

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Date:   Mon, 26 Jul 2021 12:02:57 +0800
From:   CK Hu <ck.hu@...iatek.com>
To:     Jitao Shi <jitao.shi@...iatek.com>
CC:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "Daniel Vetter" <daniel@...ll.ch>, David Airlie <airlied@...ux.ie>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>, <stonea168@....com>,
        <huijuan.xie@...iatek.com>, <rex-bc.chen@...iatek.com>,
        <shuijing.li@...iatek.com>, <robh+dt@...nel.org>,
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v3 2/2] dt-bindings: mediatek: add
 force_dsi_end_without_null for dsi

Hi, Jitao:

On Mon, 2021-07-26 at 10:11 +0800, Jitao Shi wrote:
> Some bridge chip will shift screen when the dsi data does't ent at
> the same time in line.
> 
> Signed-off-by: Jitao Shi <jitao.shi@...iatek.com>
> ---
>  .../devicetree/bindings/display/mediatek/mediatek,dsi.txt     | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
> index 8238a86686be..1c2f53f3ac3d 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
> @@ -19,6 +19,10 @@ Required properties:
>    Documentation/devicetree/bindings/graph.txt. This port should be connected
>    to the input port of an attached DSI panel or DSI-to-eDP encoder chip.
>  
> +Optional properties:
> +- force_dsi_end_without_null: Some bridge chip(ex. ANX7625) requires the
> +  packets on lanes aligned at the end.
> +

I think you should add this property in [1] because this limitation is
ANX7625's limitation.

[1]
Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml

Regards,
CK

>  MIPI TX Configuration Module
>  ============================
>