Nouveau - Apr 2020 - gp104: regression on Linux 5.6

gp104 refuses to switch to "graphic" mode and show anything past
this line:

	fb0: switching to nouveaufb from EFI VGA

Machine is fine, as it I can press Ctrl+Alt+Delete and reboot it
normally.

5.5 is OK. 5.6 is broken.
Bisecting is kinda painful with miscompilation and init/main.c breakage.

BTW do I need all those megabytes of firmware?

[    0.923273] fb0: switching to nouveaufb from EFI VGA
[    0.923440] nouveau 0000:02:00.0: NVIDIA GP104 (134000a1)
[    1.026681] nouveau 0000:02:00.0: bios: version 86.04.1e.00.01
[    1.026930] nouveau 0000:02:00.0: gr: failed to load firmware
"gr/sw_nonctx"
[    1.026934] nouveau 0000:02:00.0: gr: failed to load gr/sw_nonctx
[    1.027196] nouveau 0000:02:00.0: fb: 8192 MiB GDDR5
[    1.040683] nouveau 0000:02:00.0: DRM: VRAM: 8192 MiB
[    1.040686] nouveau 0000:02:00.0: DRM: GART: 536870912 MiB
[    1.040689] nouveau 0000:02:00.0: DRM: BIT table 'A' not found
[    1.040692] nouveau 0000:02:00.0: DRM: BIT table 'L' not found
[    1.040695] nouveau 0000:02:00.0: DRM: TMDS table version 2.0
[    1.040698] nouveau 0000:02:00.0: DRM: DCB version 4.1
[    1.040701] nouveau 0000:02:00.0: DRM: DCB outp 00: 01000f42 00020030
[    1.040704] nouveau 0000:02:00.0: DRM: DCB outp 01: 04811f96 04600020
[    1.040707] nouveau 0000:02:00.0: DRM: DCB outp 02: 04011f92 00020020
[    1.040710] nouveau 0000:02:00.0: DRM: DCB outp 03: 04822f86 04600010
[    1.040713] nouveau 0000:02:00.0: DRM: DCB outp 04: 04022f82 00020010
[    1.040716] nouveau 0000:02:00.0: DRM: DCB outp 06: 02033f62 00020010
[    1.040718] nouveau 0000:02:00.0: DRM: DCB outp 07: 02844f76 04600020
[    1.040721] nouveau 0000:02:00.0: DRM: DCB outp 08: 02044f72 00020020
[    1.040724] nouveau 0000:02:00.0: DRM: DCB conn 00: 00001031
[    1.040727] nouveau 0000:02:00.0: DRM: DCB conn 01: 02000146
[    1.040729] nouveau 0000:02:00.0: DRM: DCB conn 02: 01000246
[    1.040732] nouveau 0000:02:00.0: DRM: DCB conn 03: 00010361
[    1.040734] nouveau 0000:02:00.0: DRM: DCB conn 04: 00020446
[    1.041003] nouveau 0000:02:00.0: DRM: failed to create kernel channel, -22
[    1.041145] nouveau 0000:02:00.0: DRM: MM: using COPY for buffer copies
[    1.322372] nouveau 0000:02:00.0: DRM: allocated 1920x1200 fb: 0x200000, bo
000000002ca87195
[    1.322442] fbcon: nouveaudrmfb (fb0) is primary device
[    1.646937] nouveau 0000:02:00.0: fb0: nouveaudrmfb frame buffer device
[    1.647186] [drm] Initialized nouveau 1.3.1 20120801 for 0000:02:00.0 on
minor 0

Hi Alexey,

On Fri, Apr 24, 2020 at 10:52 PM Alexey Dobriyan <adobriyan at gmail.com>
wrote:
>
> gp104 refuses to switch to "graphic" mode and show anything past
> this line:
>
>         fb0: switching to nouveaufb from EFI VGA
>
> Machine is fine, as it I can press Ctrl+Alt+Delete and reboot it
> normally.
>
> 5.5 is OK. 5.6 is broken.
I've heard some issues relating to missing firmware lately. It should
work fine without firmware, but perhaps that got broken. Can you log
into the machine and check dmesg to see what's there? My guess is that
nouveau takes over from efifb, and then fails to load at some point in
the middle.
> Bisecting is kinda painful with miscompilation and init/main.c breakage.
>
> BTW do I need all those megabytes of firmware?
>
> [    0.923273] fb0: switching to nouveaufb from EFI VGA
> [    0.923440] nouveau 0000:02:00.0: NVIDIA GP104 (134000a1)
> [    1.026681] nouveau 0000:02:00.0: bios: version 86.04.1e.00.01
> [    1.026930] nouveau 0000:02:00.0: gr: failed to load firmware
"gr/sw_nonctx"
> [    1.026934] nouveau 0000:02:00.0: gr: failed to load gr/sw_nonctx
This is necessary to provide any sort of acceleration. Otherwise this
is just a dumb scanout engine. You only need the firmware for your
chipset, not all of it.

Cheers,

  -ilia

On Thu, Apr 30, 2020 at 12:15:28AM -0400, Ilia Mirkin
wrote:
> Hi Alexey,
> 
> On Fri, Apr 24, 2020 at 10:52 PM Alexey Dobriyan <adobriyan at
gmail.com> wrote:
> >
> > gp104 refuses to switch to "graphic" mode and show anything
past
> > this line:
> >
> >         fb0: switching to nouveaufb from EFI VGA
> >
> > Machine is fine, as it I can press Ctrl+Alt+Delete and reboot it
> > normally.
> >
> > 5.5 is OK. 5.6 is broken.
> 
> I've heard some issues relating to missing firmware lately. It should
> work fine without firmware, but perhaps that got broken. Can you log
> into the machine and check dmesg to see what's there? My guess is that
> nouveau takes over from efifb, and then fails to load at some point in
> the middle.
I've fixed the issue by including all firmware until "failed to
load"
messages disappeared. X works and fbconsole on VT1-VT6 works too.

CONFIG_EXTRA_FIRMWARE="nvidia/gp104/gr/sw_nonctx.bin
nvidia/gp104/gr/sw_ctx.bin nvidia/gp104/gr/sw_bundle_init.bin
nvidia/gp104/gr/sw_method_init.bin nvidia/gp104/gr/fecs_bl.bin
nvidia/gp104/gr/fecs_inst.bin nvidia/gp104/gr/fecs_data.bin
nvidia/gp104/gr/fecs_sig.bin nvidia/gp104/gr/gpccs_bl.bin
nvidia/gp104/gr/gpccs_inst.bin nvidia/gp104/gr/gpccs_data.bin
nvidia/gp104/gr/gpccs_sig.bin nvidia/gp104/sec2/image.bin
nvidia/gp104/sec2/desc.bin nvidia/gp104/sec2/sig.bin
nvidia/gp104/acr/ucode_load.bin nvidia/gp104/acr/ucode_unload.bin
nvidia/gp104/acr/bl.bin nvidia/gp104/acr/unload_bl.bin
nvidia/gp104/nvdec/scrubber.bin"
> > Bisecting is kinda painful with miscompilation and init/main.c
breakage.
> >
> > BTW do I need all those megabytes of firmware?
> >
> > [    0.923273] fb0: switching to nouveaufb from EFI VGA
> > [    0.923440] nouveau 0000:02:00.0: NVIDIA GP104 (134000a1)
> > [    1.026681] nouveau 0000:02:00.0: bios: version 86.04.1e.00.01
> > [    1.026930] nouveau 0000:02:00.0: gr: failed to load firmware
"gr/sw_nonctx"
> > [    1.026934] nouveau 0000:02:00.0: gr: failed to load gr/sw_nonctx
> 
> This is necessary to provide any sort of acceleration. Otherwise this
> is just a dumb scanout engine. You only need the firmware for your
> chipset, not all of it.
OK, thanks!