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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Delay in skl_disable_plane() causes a system freeze"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104975#c68">Comment # 68</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Delay in skl_disable_plane() causes a system freeze"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104975">bug 104975</a>
from <span class="vcard"><a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> <span class="fn">Ville Syrjala</span></a>
</span></b>
<pre>(In reply to Azhar from <a href="show_bug.cgi?id=104975#c67">comment #67</a>)
<span class="quote">> (In reply to Azhar from <a href="show_bug.cgi?id=104975#c66">comment #66</a>)
> > (In reply to Ville Syrjala from <a href="show_bug.cgi?id=104975#c65">comment #65</a>)
> > > Hmm. I wonder if we're still barking up the right tree with the DDB angle.
> > >
> > > I pushed the following hack:
> > > b48dad3fe322 ("hacks: fixed ddb allocation for each plane")
> > > to git://github.com/vsyrjala/linux.git double_buffer_ctl_ddb_wa_hacks
> > >
> > > Would be nice to know whether that fully eliminates the hang. If it doesn't
> > > then we would seem to be on the wrong track.
> >
> > The test has been running for more than 5 hours now, with ONLY the top
> > commit "b48dad3fe322 ("hacks: fixed ddb allocation for each plane")" on
> > linux-stable 4.15.18 branch without IPC support on BXT+.
> >
> > I will keep it running overnight.
>
> There was no crash with overnight run for above configuration.</span >
OK. I guess we're still on the right track then.
Let's try to make this double buffer thing as simple as possible:
git://github.com/vsyrjala/linux.git double_buffer_ctl_simple
That approach is no good when multiple pipes are enabled, but for a single pipe
case it's about as simple as we can make it.</pre>
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