linux-kernel - Re: [PATCH 2/4] arm64: dts: qcom: lemans: add mdss1 displayPort device nodes

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Message-ID: <vc2hen5r7xdaj4nepkoy7pk2jmj4y4hgog5o2nfndrff4yti2m@g46svhsdyy7m>
Date: Fri, 21 Nov 2025 18:42:54 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Mani Chandana Kuntumalla <quic_mkuntuma@...cinc.com>
Cc: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        marijn.suijten@...ainline.org, swboyd@...omium.org, mripard@...nel.org,
        abel.vesa@...aro.org, andersson@...nel.org, konradybcio@...nel.org,
        robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
        robin.clark@....qualcomm.com, jessica.zhang@....qualcomm.com,
        abhinav.kumar@...ux.dev, sean@...rly.run, airlied@...il.com,
        simona@...ll.ch, alex.vinarskis@...il.com,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        freedreno@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        quic_rajeevny@...cinc.com, quic_vproddut@...cinc.com,
        quic_riteshk@...cinc.com, quic_amitsi@...cinc.com
Subject: Re: [PATCH 2/4] arm64: dts: qcom: lemans: add mdss1 displayPort
 device nodes

On Thu, Nov 20, 2025 at 02:25:01PM +0530, Mani Chandana Kuntumalla wrote:
> 
> 
> On 10/8/2025 6:10 PM, Konrad Dybcio wrote:
> > On 9/26/25 10:59 AM, Mani Chandana Ballary Kuntumalla wrote:
> > > Add device tree nodes for the mdss1 DPTX0 and DPTX1 controllers
> > > with their corresponding PHYs.
> > > 
> > > Signed-off-by: Mani Chandana Ballary Kuntumalla <quic_mkuntuma@...cinc.com>
> > > ---
> > 
> > [...]
> > 
> > > +			mdss1_dp0: displayport-controller@...54000 {
> > > +				compatible = "qcom,sa8775p-dp";
> > > +
> > > +				reg = <0x0 0x22154000 0x0 0x104>,
> > 
> > sz = 0x200
> > 
> > > +				      <0x0 0x22154200 0x0 0x0c0>,
> > 
> > sz = 0x200
> > 
> > > +				      <0x0 0x22155000 0x0 0x770>,
> > 
> > sz = 0xc00> +				      <0x0 0x22156000 0x0 0x09c>,
> > > +				      <0x0 0x22157000 0x0 0x09c>,
> > > +				      <0x0 0x22158000 0x0 0x09c>,
> > > +				      <0x0 0x22159000 0x0 0x09c>,
> > 
> > sz = 0x400 for all 0x9c
> > 
> > > +				      <0x0 0x2215a000 0x0 0x23c>,
> > > +				      <0x0 0x2215b000 0x0 0x23c>;
> > 
> > 0x23c -> 0x600
> > 
> > [...]
> > 
> > 
> > > +			mdss1_dp1: displayport-controller@...5c000 {
> > > +				compatible = "qcom,sa8775p-dp";
> > > +
> > > +				reg = <0x0 0x2215c000 0x0 0x104>,
> > > +				      <0x0 0x2215c200 0x0 0x0c0>,
> > > +				      <0x0 0x2215d000 0x0 0x770>,
> > > +				      <0x0 0x2215e000 0x0 0x09c>,
> > > +				      <0x0 0x2215f000 0x0 0x09c>,
> > > +				      <0x0 0x22160000 0x0 0x09c>,
> > > +				      <0x0 0x22161000 0x0 0x09c>,
> > > +				      <0x0 0x22162000 0x0 0x23c>,
> > > +				      <0x0 0x22163000 0x0 0x23c>;
> > 
> > 0x2216_2000 and _3000 don't exist, there's no MST2/3
> > 
> > sizes should be changed similarly
> 
> MST2/3 is supported for MDSS1 DPTX0.

This is MDSS1 DPTX1

-- 
With best wishes
Dmitry