linux-kernel - Re: Various Exynos targets never return to no cooling

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Message-ID: <5ad40adf-aa79-4281-9cc3-2a1e7c10a356@arm.com>
Date:   Mon, 4 Dec 2023 11:57:59 +0000
From:   Lukasz Luba <lukasz.luba@....com>
To:     Mateusz Majewski <m.majewski2@...sung.com>
Cc:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: Various Exynos targets never return to no cooling



On 11/14/23 10:32, Lukasz Luba wrote:
> Hi Mateusz,
> 
> On 11/13/23 13:04, Mateusz Majewski wrote:
>> Hi,
>>
>> While working on some fixes on the Exynos thermal driver, I have found 
>> that some
>> of the Exynos-based boards will never return to no cooling. That is, 
>> after
>> heating the board a bit and letting it cool, we see in the sysfs 
>> output similar
>> to this:
>>

Regarding this topic, I just wanted to tell you that I had conversation
with Rafael & Daniel last Fri. Rafael gave me a hint to his latest work
in his repo regarding potentially similar race with temperature value.

I'll have a look there and experiment next week, than come back to you.

Regards,
Lukasz