[Bug 101601] New: Nvidia GT 1030 (NV138/GP108) support

[Bug 101601] New: Nvidia GT 1030 (NV138/GP108) support

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https://bugs.freedesktop.org/show_bug.cgi?id=101601

            Bug ID: 101601
           Summary: Nvidia GT 1030 (NV138/GP108) support
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: carlo-KA+7E9HrN00dnm+yROfE0A@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Created attachment 132255
  --> https://bugs.freedesktop.org/attachment.cgi?id=132255&action=edit
journal trace GP108

I'm trying to make nouveau working with this card. I'm only interested in
modesetting.

On an unmodified kernel the chipset is not recognized and at boot I get

[    0.874915] nouveau 0000:01:00.0: unknown chipset (138000a1)
[    0.874918] nouveau: probe of 0000:01:00.0 failed with error -12

I also tried to use the same settings as for the NV137 adding in base.c:

case 0x138: device->chip = &nv137_chipset; break;

With this change at boot I get a black screen and nouveau timeouts.

In attachment the journal using nouveau.bebug=trace (with the kernel
modification).

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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https://bugs.freedesktop.org/show_bug.cgi?id=101601

--- Comment #1 from Carlo Caione <carlo-KA+7E9HrN00dnm+yROfE0A@public.gmane.org> ---
Created attachment 132256
  --> https://bugs.freedesktop.org/attachment.cgi?id=132256&action=edit
VBIOS

VBIOS exctracted with nvagetbios -s prom

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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https://bugs.freedesktop.org/show_bug.cgi?id=101601

--- Comment #2 from Carlo Caione <carlo-KA+7E9HrN00dnm+yROfE0A@public.gmane.org> ---
Created attachment 132283
  --> https://bugs.freedesktop.org/attachment.cgi?id=132283&action=edit
log_gf119_disp_pioc_init_returns_0

The problem is that gf119_disp_pioc_init() is returning -EBUSY.

Modesetting works fine (let's say 90% of the times) if I force
gf119_disp_pioc_init() to return 0. Of course I highly doubt this is a
reasonable fix but at least it could give an hint where the real issue is.

In attachment the log with this ugly change (but at least I was able to have a
reasonable resolution).

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #3 from Carlo Caione <carlo-KA+7E9HrN00dnm+yROfE0A@public.gmane.org> ---
Created attachment 132286
  --> https://bugs.freedesktop.org/attachment.cgi?id=132286&action=edit
MMIOTRACE

In attachment mmiotrace (modprobe + xorg start)

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=101601

--- Comment #4 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
So it seems like there are only 2 heads instead of 4. Carlo hardcoded the heads
from 4 to 2 in gf119_disp_new_ and crtc's to 2 in nv50_display_create and was
able to get something up and running.

22448 indeed returns 4. Looking over the mmiotrace, 2245c returns 2. No clue if
that just happens to be 2 or if that's the number of heads.

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #5 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Created attachment 132292
  --> https://bugs.freedesktop.org/attachment.cgi?id=132292&action=edit
patch to check if heads are there before initialization

Based on comments from Ben, I wrote this patch against drm-next. Entirely
untested. (Won't apply to 4.12, sadly.)

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #6 from Carlo Caione <carlo-KA+7E9HrN00dnm+yROfE0A@public.gmane.org> ---
Created attachment 132293
  --> https://bugs.freedesktop.org/attachment.cgi?id=132293&action=edit
log patch drm-next

> Based on comments from Ben, I wrote this patch against drm-next. Entirely 
> untested. (Won't apply to 4.12, sadly.)
The patch doesn't seem to work fine. In attachment the log.

For reference:

# ./nvapeek 612004
00612004: 30700f03

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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https://bugs.freedesktop.org/show_bug.cgi?id=101601

--- Comment #7 from Carlo Caione <carlo-KA+7E9HrN00dnm+yROfE0A@public.gmane.org> ---
Created attachment 132296
  --> https://bugs.freedesktop.org/attachment.cgi?id=132296&action=edit
backport fix

Well, your patch backported to 4.12 works fine. Attached the patch I'm using.

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #8 from Carlo Caione <carlo-KA+7E9HrN00dnm+yROfE0A@public.gmane.org> ---
Ok, tested again the latest drm-next __without__ the patch proposed by Ilia and
it fails with the same error:

nouveau 0000:01:00.0: DRM: curs917a allocation failed: -16
nouveau: probe of 0000:01:00.0 failed with error -16

So the problem is not related to your patch (that at this point I'm fairly
confident it should work fine since it works correctly backporting it) but with
drm-next itself I guess.

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #9 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
drm-next appears to be hitting this logic in nv50_disp_chan_ctor:

        if (disp->chan[chan->chid.user]) {
                chan->chid.user = -1;
                return -EBUSY;
        }

when constructing the cursor for head 1.

drm/nouveau/nvkm/engine/disp/nv50.h:    struct nv50_disp_chan *chan[17];

Oops. That should be [21]. It was reading/writing random memory :(

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #10 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
https://patchwork.freedesktop.org/patch/164205/

See if that helps with drm-next (in addition to the other patch).

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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https://bugs.freedesktop.org/show_bug.cgi?id=101601

--- Comment #11 from Carlo Caione <carlo-KA+7E9HrN00dnm+yROfE0A@public.gmane.org> ---
Yeah, that solved the issue.
So your patch works fine with that fix on top and adding:

case 0x138: device->chip = &nv137_chipset; break;

Thanks,

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #12 from Carlo Caione <carlo-KA+7E9HrN00dnm+yROfE0A@public.gmane.org> ---
Hey guys,
anything else we can do to help you upstreaming the patch? We have a bunch of
nvidia boards around, just ask if you need any more test / data / trace.

thanks,

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #13 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Note that the preparatory patches are in Ben's tree now, should show up in 4.13
or 4.14. The one to actually enable GP108 is being delayed as he'd like some
time with the mmiotrace to double-check a few things.

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #14 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
BTW, this is the patch I sent to enable GP108:
https://patchwork.freedesktop.org/patch/164973/

And this is Ben's tree with the updated versions of those patches:
https://github.com/skeggsb/nouveau/commits/master

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #15 from Daniel Drake <dan-LrsmPHowOvpd3aXB8m+yKQ@public.gmane.org> ---
The patch titled " disp/gf119-: avoid creating non-existent heads " is not in
linux-next, does this mean it's no longer planned for inclusion in 4.14?

Also I guess the GP108 one is still pending the mmiotrace analysis?

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #16 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to Daniel Drake from comment #15)
> The patch titled " disp/gf119-: avoid creating non-existent heads " is not
> in linux-next, does this mean it's no longer planned for inclusion in 4.14?
> 
> Also I guess the GP108 one is still pending the mmiotrace analysis?

A drm-next nouveau pull for 4.14 has not been submitted yet. You can see the
current queue at

https://github.com/skeggsb/nouveau/commits/master

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #17 from Daniel Drake <dan-LrsmPHowOvpd3aXB8m+yKQ@public.gmane.org> ---
"disp/gf119-: avoid creating non-existent heads" is still not in linus tree, is
there any news here?

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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--- Comment #18 from Pierre Moreau <pierre.morrow-GANU6spQydw@public.gmane.org> ---
(In reply to Daniel Drake from comment #17)
> "disp/gf119-: avoid creating non-existent heads" is still not in linus tree,
> is there any news here?

It is definitely in Linus’ tree:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v4.14&id=eba5e56db65b7a44d57a98f5f382b2a2b9991321
and looking at the source from 4.14, the patch seems to be there as well:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/nouveau/nv50_display.c?h=v4.14#n4457

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[Bug 101601] Nvidia GT 1030 (NV138/GP108) support

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Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #19 from Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> ---
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