Nouveau - Jul 2016 - Nouveau fails to initialize G94GL / Quadro-FX1800 on aarch64 board

Hi again,

Some further digging revealed that NVPlatformProbe is called with the
flag PLATFORM_PROBE_GPU_SCREEN, so the flag XF86_ALLOCATE_GPU_SCREEN
is passed to xf86AllocateScreen.

After xf86AllocateScreen I end up with xf86GPUScreens == 1 and
xf86NumScreens == 0.

The xf86GPUScreens seems to be ignored by all the following code, only
xf86NumScreens is evaluated afterwards in xf86BusConfig:
    /* If nothing was detected, return now */
    if (xf86NumScreens == 0) {
        xf86Msg(X_ERROR, "No devices detected.\n");
        return FALSE;
    }

Is the issue that xf86NumScreens is zero at the beginning, or that
xf86GPUScreens is not taken into account later on?

Any help would be highly appreciated.

Thanks and best regards, Clemens

It's surprising that it's coming up as a platform device and not a pci
device. Perhaps xorg was built without pci support? (Not sure if
that's even possible.)

It should definitely not be coming up as a GPU screen, but as a regular screen.

  -ilia

On Thu, Jul 7, 2016 at 1:15 PM, Clemens Eisserer <linuxhippy at gmail.com>
wrote:
> Hi again,
>
> Some further digging revealed that NVPlatformProbe is called with the
> flag PLATFORM_PROBE_GPU_SCREEN, so the flag XF86_ALLOCATE_GPU_SCREEN
> is passed to xf86AllocateScreen.
>
> After xf86AllocateScreen I end up with xf86GPUScreens == 1 and
> xf86NumScreens == 0.
>
> The xf86GPUScreens seems to be ignored by all the following code, only
> xf86NumScreens is evaluated afterwards in xf86BusConfig:
>     /* If nothing was detected, return now */
>     if (xf86NumScreens == 0) {
>         xf86Msg(X_ERROR, "No devices detected.\n");
>         return FALSE;
>     }
>
> Is the issue that xf86NumScreens is zero at the beginning, or that
> xf86GPUScreens is not taken into account later on?
>
> Any help would be highly appreciated.
>
> Thanks and best regards, Clemens
> _______________________________________________
> Nouveau mailing list
> Nouveau at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/nouveau

Hi,
> It's surprising that it's coming up as a platform device and not a
pci
> device. Perhaps xorg was built without pci support? (Not sure if
> that's even possible.)
>
> It should definitely not be coming up as a GPU screen, but as a regular
screen.

When forcing it to initialize as normal screen everything seems to work
perfectly!
Xorg was used prebuilt from Debian unstable...

I'll try to find out where the culprit is...

Thanks a lot , Clemens
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