linux-kernel - Re: [PATCH] thermal: power allocator: Add control for non-power actor devices

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Message-ID: <6c2d06e7-8eda-53b0-30e1-10a21fe86f0f@arm.com>
Date:   Thu, 14 Jan 2021 11:26:48 +0000
From:   Lukasz Luba <lukasz.luba@....com>
To:     daniel.lezcano@...aro.org
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        amitk@...nel.org, rui.zhang@...el.com
Subject: Re: [PATCH] thermal: power allocator: Add control for non-power actor
 devices

Hi Daniel,

Gentle ping.

On 1/5/21 7:01 PM, Lukasz Luba wrote:
> The cooling devices which are used in IPA should provide power mapping
> functions. The callback functions are used for power estimation and state
> setting. When these functions are missing IPA ignores such cooling devices
> and does not limit their performance. It could happen that the platform
> configuration is missing these functions in example when the Energy Model
> was not setup properly (missing DT entry 'dynamic-power-coefficient').
> 
> The patch adds basic control over these devices' performance. It
> manages to throttle them to stay safe and not overheat. It also adds a
> warning during the binding phase, so it can be captured during testing.
> 
> The patch covers also a corner case when all of the cooling devices are
> non-power actors.
> 
> Signed-off-by: Lukasz Luba <lukasz.luba@....com>
> ---
>   drivers/thermal/gov_power_allocator.c | 71 +++++++++++++++++++++++++--
>   1 file changed, 68 insertions(+), 3 deletions(-)
> 

Could you have a look on the patch and if OK take it into
your tree, please?
If you missed it, I can resend. I'm still going through emails received
around my holidays.

Regards,
Lukasz