linux-kernel - Re: [PATCH v2 1/3] ARM: dts: rockchip: disable GPU 500 MHz OPP for veyron

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Date:   Wed, 22 May 2019 11:13:45 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     Matthias Kaehlcke <mka@...omium.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        devicetree@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/3] ARM: dts: rockchip: disable GPU 500 MHz OPP for veyron

Hi,

On Wed, May 22, 2019 at 2:14 AM Heiko Stuebner <heiko@...ech.de> wrote:
>
> Am Dienstag, 21. Mai 2019, 00:00:49 CEST schrieb Matthias Kaehlcke:
> > The NPLL is the only safe way to generate 500 MHz for the GPU. The
> > downstream Chrome OS 3.14 kernel ('official' kernel for veyron
> > devices) re-purposes NPLL to HDMI and hence disables the OPP for
> > the GPU (see https://crrev.com/c/1574579). Disable it here as well
> > to keep in sync and avoid problems in case someone decides to
> > re-purpose NPLL.
> >
> > Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
>
> I was actually expecting to just drop the 500MHz opp from all
> of rk3288 ;-) .
>
> To not have to respin, I just modified your patch accordingly,
> see [0] and please holler if you disagree :-D .

Seems fine to me, thanks!

-Doug