[REGRESSION] GM20B probe fails after commit 2541626cfb79

[Ben Skeggs]

On Fri, 20 Jan 2023 at 21:37, Diogo Ivo <diogo.ivo at tecnico.ulisboa.pt> wrote:
>
> On Wed, Jan 18, 2023 at 11:28:49AM +1000, Ben Skeggs wrote:
> > On Mon, 16 Jan 2023 at 22:27, Diogo Ivo <diogo.ivo at tecnico.ulisboa.pt> wrote:
> > > On Mon, Jan 16, 2023 at 07:45:05AM +1000, David Airlie wrote:
> > > > As a quick check can you try changing
> > > >
> > > > drivers/gpu/drm/nouveau/nvkm/core/firmware.c:nvkm_firmware_mem_target
> > > > from NVKM_MEM_TARGET_HOST to NVKM_MEM_TARGET_NCOH ?
>
> > In addition to Dave's change, can you try changing the
> > nvkm_falcon_load_dmem() call in gm20b_pmu_init() to:
> >
> > nvkm_falcon_pio_wr(falcon, (u8 *)&args, 0, 0, DMEM, addr_args,
> > sizeof(args), 0, false);
>
> Hello!
>
> Chiming in just to say that with this change I see the same as Nicolas
> except that the init message size is 255 instead of 0:
>
> [    2.196934] nouveau 57000000.gpu: pmu: unexpected init message size 255 vs 42
I've attached an entirely untested patch (to go on top of the other
hacks/fixes so far), that will hopefully get us a little further.

Would be great if you guys could test it out for me.

Thanks,
Ben.
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