linux-kernel - Re: [PATCH] dt-bindings: gpu: arm,mali-utgard: add additional properties

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Message-ID: <1740173.3xtLDEJ6Vg@diego>
Date:   Tue, 19 May 2020 21:06:33 +0200
From:   Heiko Stübner <heiko@...ech.de>
To:     Johan Jonker <jbx6244@...il.com>
Cc:     robh+dt@...nel.org, maxime.ripard@...e-electrons.com,
        airlied@...ux.ie, daniel@...ll.ch, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: gpu: arm,mali-utgard: add additional properties

Hi,

Am Dienstag, 19. Mai 2020, 18:44:25 CEST schrieb Johan Jonker:
> In the old txt situation we add/describe only properties that are used
> by the driver/hardware itself. With yaml it also filters things in a
> node that are used by other drivers like 'assigned-clocks' and
> 'assigned-clock-rates' for some older Rockchip SoCs in 'gpu' nodes,
> so add them to 'arm,mali-utgard.yaml'.

though the other option would be to just get rid assigned-clocks
in dt-node for utgard malis ;-)

Like any good gpu, lima should just use frequency scaling to achieve
suitable (fast <-> powersaving) frequencies and it looks like a set
of patches for this was posted in december already [0].

So I guess one could expect opp-based scaling to land at some point.

Heiko

[0] https://lwn.net/Articles/807444/