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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [NVA8] nouveau screen corruption and X lockup when reclocking"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89273#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [NVA8] nouveau screen corruption and X lockup when reclocking"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89273">bug 89273</a>
from <span class="vcard"><a class="email" href="mailto:imirkin@alum.mit.edu" title="Ilia Mirkin <imirkin@alum.mit.edu>"> <span class="fn">Ilia Mirkin</span></a>
</span></b>
<pre>I believe the two issues are unrelated. The flickering issue is probably due to
incorrect timing parameters somewhere. The hang is, more than likely, due to
[ 144.038590] nouveau W[ PFIFO][0000:01:00.0] unknown intr 0x00000040, ch 3
Which we don't handle currently. rnndb has it as
<bitfield pos="6" name="PEEPHOLE_FAULT"/>
So we probably have to reprogram PBUS.HOST_MEM.CHAN and PBUS.HOST_MEM.PEEPHOLE
(or at the very least the latter) -- that's 0x1704 and 0x1710 respectively. Not
100% sure what they are, but software/nv50.c does:
nv_wr32(priv, 0x001704, chan->vblank.channel);
nv_wr32(priv, 0x001710, 0x80000000 | chan->vblank.ctxdma);
Hopefully someone who understands these things a little better will step in
here.</pre>
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