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From: =?UTF-8?B?QmFybmFiw6FzIEN6w6ltw6Fu?= <trabarni@gmail.com>
Date: Tue, 4 Jun 2024 18:45:19 +0200
Message-ID: <CAGsSOWV9SRK1VUJiQfavEM1hL0PapxUBG6CNeD+Q=0qPT5ZnSA@mail.gmail.com>
Subject: Re: [PATCH] drm/msm/adreno: Add support for Adreno 505 GPU
To: Konrad Dybcio <konrad.dybcio@linaro.org>
Cc: Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>, 
	Abhinav Kumar <quic_abhinavk@quicinc.com>, Dmitry Baryshkov <dmitry.baryshkov@linaro.org>, 
	Marijn Suijten <marijn.suijten@somainline.org>, David Airlie <airlied@gmail.com>, 
	Daniel Vetter <daniel@ffwll.ch>, linux-arm-msm@vger.kernel.org, 
	dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, 
	linux-kernel@vger.kernel.org, Daniil Titov <daniilt971@gmail.com>
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On Tue, Jun 4, 2024 at 2:27=E2=80=AFPM Barnab=C3=A1s Cz=C3=A9m=C3=A1n <trab=
arni@gmail.com> wrote:
>
> On Tue, Jun 4, 2024 at 1:55=E2=80=AFPM Konrad Dybcio <konrad.dybcio@linar=
o.org> wrote:
> >
> >
> >
> > On 6/4/24 02:20, Barnab=C3=A1s Cz=C3=A9m=C3=A1n wrote:
> > > From: Daniil Titov <daniilt971@gmail.com>
> > >
> > > This GPU is found on SoCs such as MSM8937 (450 MHz), MSM8940 (475 MHz=
),
> > > SDM439 (650 MHz).
> > >
> > > Signed-off-by: Daniil Titov <daniilt971@gmail.com>
> > > Signed-off-by: Barnab=C3=A1s Cz=C3=A9m=C3=A1n <trabarni@gmail.com>
> > > ---
> >
> > This all looks very good, just a nit
> >
> > [...]
> >
> > > +             /*
> > > +              * Increase inactive period to 250 to avoid bouncing
> > > +              * the GDSC which appears to make it grumpy
> > > +              */
> > > +             .inactive_period =3D 250,
> >
> > Are you sure this is actually necessary?
> Every A5XX GPU is using the same value, but i have never tried with
> DRM_MSM_INACTIVE_PERIOD.
This was the original patch
https://lore.kernel.org/all/20180507224750.9383-1-jcrouse@codeaurora.org/
where the inactive period was increased for a530. I cannot test
suspend on msm8937 yet.
I can check on msm8953 with a506 maybe if a506 works fine with
DRM_MSM_INACTIVE_PERIOD
then a505 would be fine with it also.
>
> >
> > Konrad