linux-kernel - Re: [PATCH v4 16/18] arm64: dts: qcom: sdm660: Add compat qcom,sdm660-dsi-ctrl

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Date:   Sat, 26 Nov 2022 21:03:56 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        devicetree@...r.kernel.org
Cc:     robdclark@...il.com, quic_abhinavk@...cinc.com, sean@...rly.run,
        airlied@...il.com, daniel@...ll.ch, robh+dt@...nel.org,
        dianders@...omium.org, david@...t.cz,
        krzysztof.kozlowski+dt@...aro.org, swboyd@...omium.org,
        konrad.dybcio@...ainline.org, agross@...nel.org,
        andersson@...nel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 16/18] arm64: dts: qcom: sdm660: Add compat
 qcom,sdm660-dsi-ctrl

On 25/11/2022 14:36, Bryan O'Donoghue wrote:
> Add silicon specific compatible qcom,sdm660-dsi-ctrl to the
> mdss-dsi-ctrl block. This allows us to differentiate the specific bindings
> for sdm660 against the yaml documentation.
> 
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
> ---
>   arch/arm64/boot/dts/qcom/sdm660.dtsi | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sdm660.dtsi b/arch/arm64/boot/dts/qcom/sdm660.dtsi
> index 10bf1c45cf6ec..f8ec728e67f3d 100644
> --- a/arch/arm64/boot/dts/qcom/sdm660.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm660.dtsi
> @@ -154,7 +154,8 @@ mdp5_intf2_out: endpoint {
>   
>   &mdss {
>   	dsi1: dsi@...6000 {
> -		compatible = "qcom,mdss-dsi-ctrl";
> +		compatible = "qcom,sdm660-dsi-ctrl",
> +			     "qcom,mdss-dsi-ctrl";

So, we'd end up with two identical DSI hosts, but one has compatible 
'qcom,sdm660-dsi-ctrl' and another one 'qcom,sdm630-dsi-ctrl'.

I think, use sdm660 for both of them (for both sdm630 and sdm660)

>   		reg = <0x0c996000 0x400>;
>   		reg-names = "dsi_ctrl";
>   

-- 
With best wishes
Dmitry