[Nouveau] GM206 support?

[Ilia Mirkin]

On Tue, Mar 17, 2015 at 5:52 PM, Andy Lutomirski <luto at amacapital.net> wrote:
> On Fri, Feb 13, 2015 at 9:52 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>> On Fri, Feb 13, 2015 at 8:59 PM, Andy Lutomirski <luto at amacapital.net> wrote:
>>> My new GTX 960 (GM206, I think) says:
>>>
>>> [   10.329351] nouveau ![  DEVICE][0000:09:00.0] unknown Maxwell chipset
>>> [   10.329355] nouveau E[  DEVICE][0000:09:00.0] unknown chipset, 0x126010a1
>>> [   10.329356] nouveau E[     DRM] failed to create 0x00000080, -22
>>> [   10.330129] nouveau: probe of 0000:09:00.0 failed with error -22
>>>
>>> Hacking up nouveau so that it treats it like a GM204 doesn't work.
>>
>> What happens if you just drop the 0x126 next to the 0x124 in
>> engine/device/gm100.c ?
>>
>>> Are there any near-term plans to support this card?
>>
>> I don't know of anyone with the hw... maybe Ben got one? If you're
>> interested in helping, the kernel logs from the above experiment + an
>> mmiotrace of the blob drivers (see
>> https://wiki.ubuntu.com/X/MMIOTracing) + vbios (see
>> http://nouveau.freedesktop.org/wiki/DumpingVideoBios/).
>>
>> I assume you're on a recent kernel? You need 3.19 for the GM204 stuff
>> to work in the first place.
>
> Neither 3.19 nor 4.0-rcsomething works.
>
> I put an mmio trace (X startup and glxgears) and a vbios dump here:
>
> http://web.mit.edu/luto/www/GM206/

Stefan sent proper patches to get nouveau going on his GM206, which
will make it into the next 4.0-rc. Here is a tree that is destined
towards drm-fixes:

http://cgit.freedesktop.org/nouveau/linux-2.6/log/?h=linux-4.0

Let us know if it makes the card work. (Definitely no acceleration
without signed firmware for now though.)

Cheers,

  -ilia