Re: [PATCH] arm64: dts: qcom: sdm845-db845c: Mark cont splash memory region as reserved

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On 10/04/2023 09:54, Amit Pundir wrote:
On Thu, 9 Feb 2023 at 16:33, Bryan O'Donoghue
<bryan.odonoghue@xxxxxxxxxx> 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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