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Message-ID: <e10f7b87-0bc7-5e13-1757-bbf74c9cac86@linaro.org>
Date: Mon, 10 Apr 2023 13:44:39 +0100
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Amit Pundir <amit.pundir@...aro.org>
Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
Bjorn Andersson <andersson@...nel.org>,
Andy Gross <agross@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Caleb Connolly <caleb.connolly@...aro.org>,
linux-arm-msm <linux-arm-msm@...r.kernel.org>,
dt <devicetree@...r.kernel.org>,
lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: qcom: sdm845-db845c: Mark cont splash memory
region as reserved
On 10/04/2023 09:54, Amit Pundir wrote:
> On Thu, 9 Feb 2023 at 16:33, Bryan O'Donoghue
> <bryan.odonoghue@...aro.org> wrote:
>>
>> On 09/02/2023 09:05, Amit Pundir wrote:
>>> Hi, So what is the verdict on this patch?
>>>
>>> I submitted this fix to make sure UFS don't map and crash on it, which
>>> I have seen happening occassionaly on db845c and Caleb reported
>>> similar issues on his sdm845 device iirc. I should have probably put
>>> that in my commit message as well.
>>>
>>> Regards,
>>> Amit Pundir
>>
>> So the memory _is_ being used by ... continuous splash on an Android
>> image, i.e. your Android ? limited to Android - image continues on with
>> the splash but other blocks erroneously reuse the memory then, UFS as an
>> example ?
>
> Hi Bryan,
>
> Yes UFS (reported only on v5.10) tries to map this reserved memory and
> system crash and reboot. Plan is to backport this patch to v5.10.y.
>
> Regards,
> Amit Pundir
>
>>
>> ---
>> bod
Personally I'm fine with this patch on the proviso we somehow associate
it the memory MDP - even if its just a comment in the dts with the MDP.
i.e. if we run headless we want to be able to use that RAM for something.
A dts comment would do
---
bod
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