linux-kernel - Re: [PATCH v2 1/2] arm64: dts: qcom: Add link-frequencies property to specify the max link rate allowed

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Message-ID: <776f0e3b-932f-d4fe-d949-9001866d0093@linaro.org>
Date:   Wed, 9 Nov 2022 22:27:45 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Kuogee Hsieh <quic_khsieh@...cinc.com>,
        dri-devel@...ts.freedesktop.org, robdclark@...il.com,
        sean@...rly.run, swboyd@...omium.org, dianders@...omium.org,
        vkoul@...nel.org, daniel@...ll.ch, airlied@...ux.ie,
        agross@...nel.org, bjorn.andersson@...aro.org
Cc:     quic_abhinavk@...cinc.com, quic_sbillaka@...cinc.com,
        freedreno@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] arm64: dts: qcom: Add link-frequencies property to
 specify the max link rate allowed

On 09/11/2022 21:34, Kuogee Hsieh wrote:
> This patch add link-frequencies property to allow each platform to specify its
> DP max link rate.
> 
> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
> ---
>   arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
> index 93e39fc..7e5d755 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
> @@ -441,6 +441,7 @@ ap_i2c_tpm: &i2c14 {
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&dp_hot_plug_det>;
>   	data-lanes = <0 1>;
> +        link-frequencies = <810000>;

The link frequency is a property of the link - in other words a graph 
connection. Please don't put random propreties into DT nodes where they 
are not to be used.


>   };
>   
>   &mdss_mdp {

-- 
With best wishes
Dmitry