linux-kernel - Re: [PATCH v2] drm/lima: add governor data with pre-defined thresholds

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Message-ID: <2c8d2b9e-c1cc-1157-19de-409957ecf9da@arm.com>
Date:   Mon, 1 Feb 2021 09:59:22 +0000
From:   Lukasz Luba <lukasz.luba@....com>
To:     Qiang Yu <yuq825@...il.com>,
        Christian Hewitt <christianshewitt@...il.com>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        lima@...ts.freedesktop.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Steven Price <steven.price@....com>
Subject: Re: [PATCH v2] drm/lima: add governor data with pre-defined
 thresholds



On 1/30/21 1:57 PM, Qiang Yu wrote:
> This patch gets minor improvement on glmark2 (160->162).

It has bigger impact when the load is changing and the frequency
is stuck to min w/o this patch.

> 
> Seems there's no way for user to change this value, do we?
> Or there's work pending to expose it to sysfs?

True there is no user sysfs. I've proposed a patch to export these via
sysfs. Chanwoo is going to work on it. When it will land mainline, it's
probably a few months. So for now, the fix makes sense.

Regards,
Lukasz