[Nouveau] [Bug 91025] nouveau fails to run with NV5 [Riva TNT2 / TNT2 Pro]

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Jun 18 19:35:52 PDT 2015


--- Comment #2 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Hm fun, a non-M64 TNT2. I looked at the vbios dump you attached, and it indeed
has the unknown opcodes. I tried flipping some bits to get it to parse, but
it'd take a lot of manipulation to fix it.

Would you mind extracting the vbios using envytools's nvagetbios? It should
have 2 diff methods, please try both of them. You can also look at the output
with the nvbios tool.

Looks like 0x59 and 0x5a have 6 bytes worth of arguments each. And we have a
hole there (i.e. 0x58 and 0x5b are both known) so it makes sense that they're
real opcodes... should try decoding the asm...

Short-term you can add entries in the table in subdev/bios/init.c and have the
function skip 7 bytes each (6 byte arg + 1 byte op).

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