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Date:   Tue, 3 Mar 2020 16:49:55 +0100
From:   Guido =?iso-8859-1?Q?G=FCnther?= <agx@sigxcpu.org>
To:     Lucas Stach <l.stach@pengutronix.de>
Cc:     Russell King <linux+etnaviv@armlinux.org.uk>,
        Christian Gmeiner <christian.gmeiner@gmail.com>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>, etnaviv@lists.freedesktop.org,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/5] drm/etnaviv: Ignore MC bit when checking for runtime
 suspend
Message-ID: <20200303154955.GA174372@bogon.m.sigxcpu.org>
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 <4c61fde86c5e0dced249221dbc0a8d4207d5bffa.camel@pengutronix.de>
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Hi Lucas,
On Tue, Mar 03, 2020 at 12:55:04PM +0100, Lucas Stach wrote:
> On Mo, 2020-03-02 at 20:13 +0100, Guido G?nther wrote:
> > At least GC7000 fails to enter runtime suspend for long periods of time since
> > the MC becomes busy again even when the FE is idle. The rest of the series
> > makes detecting similar issues easier to debug in the future by checking
> > all known bits in debugfs and also warning in the EBUSY case.
> 
> Thanks, series applied to etnaviv/next.

Thanks!

> 
> > Tested on GC7000 with a reduced runtime delay of 50ms. Patches are
> > against next-20200226.
> 
> I've already wondered if 200ms is too long, 50ms sounds more
> reasonable. Do you have any numbers on the power draw on the i.MX8M
> with idle GPU, vs. being fully power gated?

I don't have good numbers yet but i'll post here once i do.
Cheers,
 -- Guido

> 
> Regards,
> Lucas
> 
> > Thanks to Lucas Stach for pointing me in the right direction.
> > 
> > Guido G?nther (5):
> >   drm/etnaviv: Fix typo in comment
> >   drm/etnaviv: Update idle bits
> >   drm/etnaviv: Consider all kwnown idle bits in debugfs
> >   drm/etnaviv: Ignore MC when checking runtime suspend idleness
> >   drm/etnaviv: Warn when GPU doesn't idle fast enough
> > 
> >  drivers/gpu/drm/etnaviv/etnaviv_gpu.c  | 26 ++++++++++++++++++++++----
> >  drivers/gpu/drm/etnaviv/state_hi.xml.h |  7 +++++++
> >  2 files changed, 29 insertions(+), 4 deletions(-)
> > 
>