linux-kernel - Re: [PATCH v3 0/5] Add generic-display-mux driver and bindings

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Date:   Wed, 29 Mar 2023 23:40:28 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Pin-yen Lin <treapking@...omium.org>
Cc:     Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Benson Leung <bleung@...omium.org>,
        chrome-platform@...ts.linux.dev,
        Nicolas Boichat <drinkcat@...omium.org>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Matthias Brugger <matthias.bgg@...il.com>,
        devicetree@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        Guenter Roeck <groeck@...omium.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 0/5] Add generic-display-mux driver and bindings

On Sat, Feb 18, 2023 at 4:47 PM Pin-yen Lin <treapking@...omium.org> wrote:
>
> This series is developed for and tested on MT8173 board, and the layout is:
>
>                                   /-- anx7688
> -- MT8173 HDMI bridge -- GPIO mux
>                                   \-- native HDMI

What is the part number of this GPIO mux? Does mux gpio interrupt
based and able to switch output HDMI and DP. If so, how this gpio
interrupt is different than the HPD in native HDMI? I mean does HPD
have any detection bottlenecks with mux gpio interrupt?

I do have GPIO Mux that input DSI and two outputs DMD/HDMI Input and
HDMI Out. 2x1 with 1x2 mux.

I'm thinking having a generic mux to select the specific out number of
outputs with associated interface outputs can be a viable solution to
address all use cases here.

Thanks,
Jagan.