linux-kernel - Re: [PATCH RFC/WIP 0/4] arm64: dts: qcom: sm8750: Enable display

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Message-ID: <gbcy2uegaf5xdpsgwby3m7sj3pwahjboykfh6bxachsvabvhad@m6dbgxnigp7d>
Date: Thu, 30 Oct 2025 19:56:28 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Mahadevan P <mahadevan.p@....qualcomm.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        jesszhan0024@...il.com, quic_rajeevny@...cinc.com,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Abhinav Kumar <abhinavk@...cinc.com>, Abel Vesa <abel.vesa@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC/WIP 0/4] arm64: dts: qcom: sm8750: Enable display

On Thu, Oct 30, 2025 at 05:51:02PM +0530, Mahadevan P wrote:
> Hi Dmitry/Krzysztof,
> 
> On 10/30/2025 4:46 PM, Dmitry Baryshkov wrote:
> > Hi Mahadevan,
> > 
> > On Wed, 29 Oct 2025 at 08:20, Mahadevan P <mahadevan.p@....qualcomm.com> wrote:
> > > 
> > > Hi Krzysztof,
> > > 
> > > On 4/26/2025 1:24 AM, Krzysztof Kozlowski wrote:
> > > 
> > > On 25/04/2025 21:34, Dmitry Baryshkov wrote:
> > > 
> > > On Thu, Apr 24, 2025 at 03:04:24PM +0200, Krzysztof Kozlowski wrote:
> > 
> > Could you please fix your email client to _never_ send HTML emails.
> > You've destroyed all the quoting (quotation?) levels. Your email was
> > caught by the automatic mailing list filters, etc.
> 
> Thank you for your feedback and I've updated my email client settings to
> ensure only plain text is sent going forward.
> 
> > 
> > > We at Qualcomm are currently working on bringing up the DSI display on MTP. For this, I’ve picked the following patches on top of v6.18-rc2:
> > > 
> > > All the DT changes mentioned in this series
> > > [PATCH v2] drm/msm/dpu: Fix adjusted mode clock check for 3d merge
> > > https://lore.kernel.org/all/1154f275-f934-46ae-950a-209d31463525@kernel.org/
> > > [PATCH v2 0/2] drm/panel: Add Novatek NT37801 panel driver
> > > https://lore.kernel.org/all/20250508-sm8750-display-panel-v2-0-3ca072e3d1fa@linaro.org/
> > > 
> > > However, when testing with modetest, the panel appears blank. I wanted to check if there are any additional patches already posted that I might have missed and should be included.
> > 
> > Any errors or warnings in dmesg?
> 
> There were no errors seen. only panel was not lighting up. Got unblocked and
> able to validated modetest on DSI and working fine with this workaround on
> linux-next
> https://lore.kernel.org
> all/20251023080609.1212-2-yuanjie.yang@....qualcomm.com/

Broken link. Just to point out, this patch is NAKed.

> 
> > 
> > > 
> > > Also, I’m curious to understand more about the DSI PHY PLL VCO rate issue that Jessica had narrowed down—could you please share some details?
> > > 
> > > Lastly, I’d appreciate it if you could share the plan for merging these changes upstream. We’re aiming to enable display support on this target as part of our program.
> > 
> > Please see Documentation/process/, I think it describes the process of
> > merging patches pretty well.
> 
> Sorry for any confusion in my previous message. Could you please share when
> we might expect the next non-RFC version of this series, specifically for
> the DSI enablement patch? Alternatively, if there are no immediate plans to
> post an updated version, would it be acceptable for us to take it forward
> and submit the subsequent non-RFC versions of the MDSS and DSI enablement
> device tree patches by adding dependency to this https://lore.kernel.org
> all/20251023080609.1212-2-yuanjie.yang@....qualcomm.com/.
> 
> > 
> Thanks,
> Mahadevan

-- 
With best wishes
Dmitry