linux-kernel - Re: [PATCH 1/5] drm/msm/adreno: Use OPP for every GPU generation

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Message-ID: <CAFXsbZqnstOLFBrVVa7aFLSGCPNj4VkjExqq1XUoRdUUuBKdog@mail.gmail.com>
Date:   Fri, 24 Feb 2023 08:56:01 -0800
From:   Chris Healy <cphealy@...il.com>
To:     dmitry.baryshkov@...aro.org
Cc:     airlied@...il.com, Daniel Vetter <daniel@...ll.ch>,
        DRI mailing list <dri-devel@...ts.freedesktop.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        konrad.dybcio@...aro.org,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        quic_abhinavk@...cinc.com, Rob Clark <robdclark@...il.com>,
        sean@...rly.run, Marek Vasut <marex@...x.de>
Subject: Re: [PATCH 1/5] drm/msm/adreno: Use OPP for every GPU generation

I may be missing something, but looking at the code path for a2xx,
it's not clear to me how this would work with SoCs with a2xx that
don't support 200MHz for GPU frequency.  For example, the NXP i.MX51
requires the A205 GPU to run at 166MHz while the NXP i.MX53 requires
the A205 GPU to run at 200MHz.