linux-kernel - Re: [PATCH v14 1/3] dt-bindings: display: mediatek: control dpi pins mode to avoid leakage

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Date:   Sat, 4 Apr 2020 22:06:42 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Jitao Shi <jitao.shi@...iatek.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        srv_heupstream@...iatek.com, huijuan.xie@...iatek.com,
        stonea168@....com, cawa.cheng@...iatek.com,
        linux-mediatek@...ts.infradead.org, yingjoe.chen@...iatek.com,
        eddie.huang@...iatek.com, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v14 1/3] dt-bindings: display: mediatek: control dpi pins
 mode to avoid leakage

Hi, Jitao:

Jitao Shi <jitao.shi@...iatek.com> 於 2020年4月3日 週五 下午4:04寫道：
>
> Add property "pinctrl-names" to swap pin mode between gpio and dpi mode. Set
> the dpi pins to gpio mode and output-low to avoid leakage current when dpi
> disabled.
>

Reviewed-by: Chun-Kuang Hu <chunkuang.hu@...nel.org>

> Signed-off-by: Jitao Shi <jitao.shi@...iatek.com>
> ---
>  .../devicetree/bindings/display/mediatek/mediatek,dpi.txt   | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
> index 58914cf681b8..77def4456706 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
> @@ -17,6 +17,9 @@ Required properties:
>    Documentation/devicetree/bindings/graph.txt. This port should be connected
>    to the input port of an attached HDMI or LVDS encoder chip.
>
> +Optional properties:
> +- pinctrl-names: Contain "default" and "sleep".
> +
>  Example:
>
>  dpi0: dpi@...1d000 {
> @@ -27,6 +30,9 @@ dpi0: dpi@...1d000 {
>                  <&mmsys CLK_MM_DPI_ENGINE>,
>                  <&apmixedsys CLK_APMIXED_TVDPLL>;
>         clock-names = "pixel", "engine", "pll";
> +       pinctrl-names = "default", "sleep";
> +       pinctrl-0 = <&dpi_pin_func>;
> +       pinctrl-1 = <&dpi_pin_idle>;
>
>         port {
>                 dpi0_out: endpoint {
> --
> 2.21.0
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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