linux-kernel - Re: [PATCH v2 2/3] arm64: dts: qcom: lemans: add mdss1 display device nodes

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Message-ID: <faau2h5z53frwfply57oh75zr5gcz4gf3za4vflbyht3ok4zgz@2ylcwcqcl4rt>
Date: Wed, 10 Dec 2025 10:21:37 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: Mani Chandana Ballary Kuntumalla <quic_mkuntuma@...cinc.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,
        Mahadevan P <mahadevan.p@....qualcomm.com>
Subject: Re: [PATCH v2 2/3] arm64: dts: qcom: lemans: add mdss1 display
 device nodes

On Mon, Dec 01, 2025 at 02:35:44PM +0100, Konrad Dybcio wrote:
> On 11/25/25 11:56 AM, Mani Chandana Ballary Kuntumalla wrote:
> > Add devicetree changes to enable second Mobile Display Subsystem (mdss1),
> > Display Processing Unit(DPU), Display Port(DP) controllers and eDP PHYs
> > on the Qualcomm Lemans platform.
> > 
> > Signed-off-by: Mahadevan P <mahadevan.p@....qualcomm.com>
> > Signed-off-by: Mani Chandana Ballary Kuntumalla <quic_mkuntuma@...cinc.com>
> > ---
> 
> [...]
> 
> > +			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>;
> 
> The last two regions still happen not to exist

According to the memory map I observe, they do exist.

> https://lore.kernel.org/all/vc2hen5r7xdaj4nepkoy7pk2jmj4y4hgog5o2nfndrff4yti2m@g46svhsdyy7m/

-- 
With best wishes
Dmitry