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

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Message-ID: <58a658bb-7338-442f-ad8c-845b5fa5ce00@oss.qualcomm.com>
Date: Thu, 30 Oct 2025 17:51:02 +0530
From: Mahadevan P <mahadevan.p@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....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

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/

> 
>>
>> 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