linux-kernel - Re: [PATCH] drm/msm: Disable frequency clamping on a630

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Message-ID: <CAMi1Hd2cO=vmFA81y2T9oAPxyKPpKn5d+uOs9emFbiop1vFD-A@mail.gmail.com>
Date:   Tue, 7 Sep 2021 13:48:54 +0530
From:   Amit Pundir <amit.pundir@...aro.org>
To:     Rob Clark <robdclark@...il.com>
Cc:     John Stultz <john.stultz@...aro.org>,
        Caleb Connolly <caleb.connolly@...aro.org>,
        Rob Clark <robdclark@...omium.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Jonathan Marek <jonathan@...ek.ca>,
        David Airlie <airlied@...ux.ie>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Sharat Masetty <smasetty@...eaurora.org>,
        Akhil P Oommen <akhilpo@...eaurora.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Stephen Boyd <sboyd@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Sean Paul <sean@...rly.run>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/msm: Disable frequency clamping on a630

On Tue, 7 Sept 2021 at 02:53, Rob Clark <robdclark@...il.com> wrote:
>
> On Mon, Sep 6, 2021 at 1:50 PM Rob Clark <robdclark@...il.com> wrote:
> >
> >
> > ok, I guess it is at least not a board specific thing (ie. won't need
> > to introduce some dt binding)..
> >
> > It would be nice to know what the maximum we can safely increase freq
> > in one step, if we need to limit that.
>
> Also, one sanity check.. for android builds, are you using the same
> a630_gmu.bin from linux-firmware?  If not, does the l-f gmu fw change
> things?

We are using the same a630_gmu.bin from linux-firmware.

>
> For freq changes, we basically ask gmu for the freq we want, and it
> votes for the requested freq.. so a gmu fw bug could be possible here.
>
> BR,
> -R