linux-kernel - Re: [PATCH 0/3] thermal/drivers/mediatek/lvts_thermal: Fixes to the interrupt handling

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Date:   Fri, 2 Jun 2023 10:07:29 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>
Cc:     Chen-Yu Tsai <wenst@...omium.org>,
        Alexandre Bailon <abailon@...libre.com>, kernel@...labora.com,
        Balsam CHIHI <bchihi@...libre.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Alexandre Mergnat <amergnat@...libre.com>,
        Amit Kucheria <amitk@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH 0/3] thermal/drivers/mediatek/lvts_thermal: Fixes to the
 interrupt handling

On 30/05/2023 21:46, Nícolas F. R. A. Prado wrote:
> On Tue, May 30, 2023 at 02:27:36PM +0200, Daniel Lezcano wrote:
>>
>> Hi,
>>
>> On 02/05/2023 12:33, Chen-Yu Tsai wrote:
>>> On Fri, Apr 28, 2023 at 03:53:44PM -0400, Nícolas F. R. A. Prado wrote:
>>>>
>>>> Fixes in the interrupt handling of the LVTS thermal driver noticed while
>>>> testing it on the Spherion Chromebook (mt8192-asurada-spherion) with the
>>>> MT8192 support series [1].
>>>>
>>>> These are standalone fixes and don't depend on anything else.
>>>>
>>>> [1] https://lore.kernel.org/all/20230307163413.143334-1-bchihi@baylibre.com/
>>>>
>>>> Thanks,
>>>> Nícolas
>>>>
>>>>
>>>> Nícolas F. R. A. Prado (3):
>>>>     thermal/drivers/mediatek/lvts_thermal: Handle IRQ on all controllers
>>>>     thermal/drivers/mediatek/lvts_thermal: Honor sensors in immediate mode
>>>>     thermal/drivers/mediatek/lvts_thermal: Disable undesired interrupts
>>>
>>> This series seems to have solved all interrupt storm issue I ran into, so
>>>
>>> Tested-by: Chen-Yu Tsai <wenst@...omium.org>
>>
>> I gave a try on a mt8195 board and I don't see any interrupt firing when
>> crossing the temperature thresholds.
>>
>> Did I miss something ?
> 
> No, indeed interrupts seem to be completely disabled on mt8195, even after
> setting the controllers to filtered mode (a requirement to get interrupts).

Really? interrupts work only on filtered mode? That sounds strange

What board are you using for testing?

> I
> haven't investigated that further yet. This series was validated on mt8192,
> which did have working interrupts, but they were being triggered too often.

Ok.

> Also note that I've sent a v2 with even more fixes:
> https://lore.kernel.org/all/20230504004852.627049-1-nfraprado@collabora.com/

Yes, I'm reviewing it closely

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