[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #25 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Luke Tidd from comment #23)
> Created attachment 126611 [details]
> (broken) dmesg_4.7.4-1-ARCH nouveau.debug=debug,bios=trace

I am very confused by the lack of trace output for the bios execution. That
should have worked. It's clearly running the tables...

[    1.960340] nouveau 0000:01:00.0: devinit: running init tables

Secondly, one of your bios init scripts contains the command

0x8209: 7a 54 b1 13 00 02 00 00 00                     ZM_REG   R[0x13b154] =
0x00000002

in init script 3 (starting at 0x8116). This is the cause of

[    4.108908] nouveau 0000:01:00.0: bus: MMIO write of 00000002 FAULT at
13b154 [ IBUS ]

However that is only reported when GT214_DISP is being initialized. Again, odd,
but I'm not 100% sure how the init scripts are executed. This might have to be
one for Ben...

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