linux-kernel - Re: [PATCH v5 6/6] arm64: dts: sdm845: Add "no-hpd" to sn65dsi86 on cheza

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Message-ID: <20200512012123.GC57962@builder.lan>
Date:   Mon, 11 May 2020 18:21:23 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Douglas Anderson <dianders@...omium.org>
Cc:     linus.walleij@...aro.org, bgolaszewski@...libre.com,
        airlied@...ux.ie, daniel@...ll.ch, robh+dt@...nel.org,
        narmstrong@...libre.com, a.hajda@...sung.com,
        Laurent.pinchart@...asonboard.com, spanda@...eaurora.org,
        jonas@...boo.se, jeffrey.l.hugo@...il.com,
        linux-gpio@...r.kernel.org, swboyd@...omium.org,
        jernej.skrabec@...l.net, devicetree@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        robdclark@...omium.org, Andy Gross <agross@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 6/6] arm64: dts: sdm845: Add "no-hpd" to sn65dsi86 on
 cheza

On Thu 07 May 14:35 PDT 2020, Douglas Anderson wrote:

> We don't have the HPD line hooked up to the bridge chip.  Add it as
> suggested in the patch ("dt-bindings: drm/bridge: ti-sn65dsi86:
> Document no-hpd").
> 
> NOTE: this patch isn't expected to have any effect but just keeps us
> cleaner for the future.  Currently the driver in Linux just assumes
> that nobody has HPD hooked up.  This change allows us to later
> implement HPD support in the driver without messing up sdm845-cheza.
> 
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> Reviewed-by: Stephen Boyd <swboyd@...omium.org>

Applied this patch for 5.8 in the Qualcomm SoC tree.

Regards,
Bjorn

> ---
> 
> Changes in v5: None
> Changes in v4: None
> Changes in v3: None
> Changes in v2:
> - ("arm64: dts: sdm845: Add "no-hpd" to sn65dsi86 on cheza") new for v2.
> 
>  arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi b/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> index 9070be43a309..5938f8b2aa2f 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> @@ -548,6 +548,8 @@ sn65dsi86_bridge: bridge@2d {
>  		clocks = <&rpmhcc RPMH_LN_BB_CLK2>;
>  		clock-names = "refclk";
>  
> +		no-hpd;
> +
>  		ports {
>  			#address-cells = <1>;
>  			#size-cells = <0>;
> -- 
> 2.26.2.645.ge9eca65c58-goog
>