<div dir="ltr">Would this power difference with the GPU also apply with the GC3000 in the i.MX6qp or the GC2000 in the i.MX6q? </div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jun 25, 2020 at 8:04 AM Guido Günther <<a href="mailto:agx@sigxcpu.org">agx@sigxcpu.org</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi, On Tue, Mar 03, 2020 at 12:55:04PM +0100, Lucas Stach wrote: > On Mo, 2020-03-02 at 20:13 +0100, Guido Günther 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. > > > 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? The difference is at least 250mW. It makes a huge difference over here. We hit <a href="https://lore.kernel.org/dri-devel/20200614064601.7872-1-navid.emamdoost@gmail.com/" rel="noreferrer" target="_blank">https://lore.kernel.org/dri-devel/20200614064601.7872-1-navid.emamdoost@gmail.com/</a> recently and you notice instantly when that happens when looking at the SoC temperature. Cheers, -- Guido > > Regards, > Lucas > > > Thanks to Lucas Stach for pointing me in the right direction. > > > > Guido Günther (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(-) > > > _______________________________________________ etnaviv mailing list <a href="mailto:etnaviv@lists.freedesktop.org" target="_blank">etnaviv@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/etnaviv" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/etnaviv</a> </blockquote></div>