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From: Rob Herring <robh@kernel.org>
To: Lukasz Luba <lukasz.luba@arm.com>
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	vireshk@kernel.org, sboyd@kernel.org, nm@ti.com,
	rafael@kernel.org, sudeep.holla@arm.com,
	daniel.lezcano@linaro.org, Dietmar.Eggemann@arm.com
Subject: Re: [PATCH 1/4] dt-bindings: opp: Introduce opp-sustainable bindings
Date: Fri, 30 Oct 2020 14:34:27 -0500	[thread overview]
Message-ID: <20201030193427.GA4186428@bogus> (raw)
In-Reply-To: <20201028140847.1018-2-lukasz.luba@arm.com>

On Wed, Oct 28, 2020 at 02:08:44PM +0000, Lukasz Luba wrote:
> Add opp-sustainable as an additional property in the OPP node to describe
> the sustainable performance level of the device. This will help to
> estimate the sustainable performance of the whole system.
> 
> Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
> ---
>  Documentation/devicetree/bindings/opp/opp.txt | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt
> index 9847dfeeffcb..cd01028de305 100644
> --- a/Documentation/devicetree/bindings/opp/opp.txt
> +++ b/Documentation/devicetree/bindings/opp/opp.txt
> @@ -154,6 +154,10 @@ Optional properties:
>  - opp-suspend: Marks the OPP to be used during device suspend. If multiple OPPs
>    in the table have this, the OPP with highest opp-hz will be used.
>  
> +- opp-sustainable: Marks the OPP as sustainable. This property can be used for
> +  estimating sustainable performance of the whole system. If multiple OPPs in
> +  the table have this, the OPP with highest opp-hz will be used.
> +

Isn't this just the inverse of the turbo? or boost? flag we already 
have? 

Couldn't this be learned? I ran at this frequency and then overheated. 
That could be dependent on ambient temperatures or dust build up on 
fans/heatsink.

Rob

WARNING: multiple messages have this Message-ID (diff)
From: Rob Herring <robh@kernel.org>
To: Lukasz Luba <lukasz.luba@arm.com>
Cc: nm@ti.com, devicetree@vger.kernel.org, daniel.lezcano@linaro.org,
	linux-pm@vger.kernel.org, sboyd@kernel.org, vireshk@kernel.org,
	rafael@kernel.org, linux-kernel@vger.kernel.org,
	sudeep.holla@arm.com, Dietmar.Eggemann@arm.com,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/4] dt-bindings: opp: Introduce opp-sustainable bindings
Date: Fri, 30 Oct 2020 14:34:27 -0500	[thread overview]
Message-ID: <20201030193427.GA4186428@bogus> (raw)
In-Reply-To: <20201028140847.1018-2-lukasz.luba@arm.com>

On Wed, Oct 28, 2020 at 02:08:44PM +0000, Lukasz Luba wrote:
> Add opp-sustainable as an additional property in the OPP node to describe
> the sustainable performance level of the device. This will help to
> estimate the sustainable performance of the whole system.
> 
> Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
> ---
>  Documentation/devicetree/bindings/opp/opp.txt | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt
> index 9847dfeeffcb..cd01028de305 100644
> --- a/Documentation/devicetree/bindings/opp/opp.txt
> +++ b/Documentation/devicetree/bindings/opp/opp.txt
> @@ -154,6 +154,10 @@ Optional properties:
>  - opp-suspend: Marks the OPP to be used during device suspend. If multiple OPPs
>    in the table have this, the OPP with highest opp-hz will be used.
>  
> +- opp-sustainable: Marks the OPP as sustainable. This property can be used for
> +  estimating sustainable performance of the whole system. If multiple OPPs in
> +  the table have this, the OPP with highest opp-hz will be used.
> +

Isn't this just the inverse of the turbo? or boost? flag we already 
have? 

Couldn't this be learned? I ran at this frequency and then overheated. 
That could be dependent on ambient temperatures or dust build up on 
fans/heatsink.

Rob

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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2020-10-30 19:35 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-28 14:08 [PATCH 0/4] Add sustainable OPP concept Lukasz Luba
2020-10-28 14:08 ` Lukasz Luba
2020-10-28 14:08 ` [PATCH 1/4] dt-bindings: opp: Introduce opp-sustainable bindings Lukasz Luba
2020-10-28 14:08   ` Lukasz Luba
2020-10-28 21:47   ` Nishanth Menon
2020-10-28 21:47     ` Nishanth Menon
2020-10-29 10:04     ` Lukasz Luba
2020-10-29 10:04       ` Lukasz Luba
2020-10-29 12:59       ` Nishanth Menon
2020-10-29 12:59         ` Nishanth Menon
2020-10-29 13:33         ` Lukasz Luba
2020-10-29 13:33           ` Lukasz Luba
2020-10-29 13:49           ` Nishanth Menon
2020-10-29 13:49             ` Nishanth Menon
2020-10-29 14:20             ` Lukasz Luba
2020-10-29 14:20               ` Lukasz Luba
2020-10-30 19:34   ` Rob Herring [this message]
2020-10-30 19:34     ` Rob Herring
2020-11-02  8:40     ` Lukasz Luba
2020-11-02  8:40       ` Lukasz Luba
2020-10-28 14:08 ` [PATCH 2/4] OPP: Add support for parsing the 'opp-sustainable' property Lukasz Luba
2020-10-28 14:08   ` Lukasz Luba
2020-10-30 11:47   ` Quentin Perret
2020-10-30 11:47     ` Quentin Perret
2020-10-30 12:53     ` Lukasz Luba
2020-10-30 12:53       ` Lukasz Luba
2020-10-28 14:08 ` [PATCH 3/4] OPP: Add dev_pm_opp_set_sustainable_opp_freq() Lukasz Luba
2020-10-28 14:08   ` Lukasz Luba
2020-10-28 14:08 ` [PATCH 4/4] firmware: arm_scmi/perf: Mark sustainable OPP Lukasz Luba
2020-10-28 14:08   ` Lukasz Luba
2020-10-29  7:40 ` [PATCH 0/4] Add sustainable OPP concept Viresh Kumar
2020-10-29  7:40   ` Viresh Kumar
2020-10-29  7:53   ` Viresh Kumar
2020-10-29  7:53     ` Viresh Kumar
2020-10-29  9:56     ` Lukasz Luba
2020-10-29  9:56       ` Lukasz Luba
2020-10-30  8:29       ` Viresh Kumar
2020-10-30  8:29         ` Viresh Kumar
2020-10-30  9:19         ` Lukasz Luba
2020-10-30  9:19           ` Lukasz Luba
2020-10-30  9:52           ` Viresh Kumar
2020-10-30  9:52             ` Viresh Kumar
2020-10-30 10:56             ` Lukasz Luba
2020-10-30 10:56               ` Lukasz Luba
2020-10-30 11:17               ` Viresh Kumar
2020-10-30 11:17                 ` Viresh Kumar
2020-10-30 12:40                 ` Lukasz Luba
2020-10-30 12:40                   ` Lukasz Luba

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