linux-kernel - Re: [PATCH v4 12/12] arm64: dts: qcom: sdm845-lg-common: remove framebuffer reserved-mem

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Message-ID: <de30bfad-a28f-4cc0-9099-11877428070e@ixit.cz>
Date: Wed, 3 Dec 2025 11:37:55 +0100
From: David Heidelberg <david@...t.cz>
To: Paul Sajna <sajattack@...tmarketos.org>,
 Konrad Dybcio <konrad.dybcio@....qualcomm.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>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, phone-devel@...r.kernel.org,
 Amir Dahan <system64fumo@...tonmail.com>,
 Christopher Brown <crispybrown@...il.com>
Subject: Re: [PATCH v4 12/12] arm64: dts: qcom: sdm845-lg-common: remove
 framebuffer reserved-mem

On 03/12/2025 09:42, Paul Sajna wrote:
> December 2, 2025 at 10:34 AM, "Konrad Dybcio" <konrad.dybcio@....qualcomm.com mailto:konrad.dybcio@....qualcomm.com?to=%22Konrad%20Dybcio%22%20%3Ckonrad.dybcio%40oss.qualcomm.com%3E > wrote:
> 
> 
>>
>> On 12/2/25 5:41 AM, Paul Sajna wrote:
>>
>>>
>>> December 1, 2025 at 12:41 PM, "Konrad Dybcio" <konrad.dybcio@....qualcomm.com mailto:konrad.dybcio@....qualcomm.com?to=%22Konrad%20Dybcio%22%20%3Ckonrad.dybcio%40oss.qualcomm.com%3E > wrote:
>>>   
>>>   
>>>
>>>>
>>>> On 11/25/25 9:12 AM, Paul Sajna wrote:
>>>>
>>>   It causes this warning
>>>   
>>>   [ 0.000000] OF: reserved mem: OVERLAP DETECTED!
>>>   framebuffer@...00000 mailto:framebuffer@...00000
>>>   (0x000000009d400000--0x000000009f800000) overlaps with
>>>   memory@...00000 mailto:memory@...00000 (0x000000009d400000--0x000000009f800000)
>>>   
>>>   Signed-off-by: Paul Sajna <sajattack@...tmarketos.org>
>>>   ---
>>>
>>>>
>>>> It's defined for both devices that include this dtsi.. perhaps you
>>>>   could remove it from there
>>>>
>>>>   Konrad
>>>>
>>>   
>>>   I don't have a judyp to test with and prefer to limit scope.
>>>
>> This is a mechanical change
>>
>> Konrad
>>
> 
> Sorry, I tried to have a look at what you meant but didn't quite understand. In this patch I changed the dtsi that is included by both already. I don't see any other reserved-mem nodes in judyp. Do you mean I should remove the framebuffer from judyp? I don't think that's wise since a panel driver isn't added as far as I know.

I think this warning likely comes from sdm845-mainline repo, as it has 
extra patches, which trying to abstract framebuffer into sdm845.dtsi, 
where it likely conflicts, have you tried against clean 6.18-rcX or next?

David