https://bugs.freedesktop.org/show_bug.cgi?id=94473
--- Comment #28 from Kevin Brace <kevinbr...@gmx.com> ---
(In reply to HuangRan from comment #21)
Hi Frank,
> Hi Kevin,
>
>
> >
> > I saw the new bug report you filed regarding the HDMI.
> > I am thinking that this bug you originally filed for (AGP related issue)
> > probably existed when James wrote the code, and possibly he never bothered
> > to fix it or did not noticed it.
> > How do you think?
>
> I am not sure on this, with my debugging yesterday on the kernel, I found
> dev->agp is NULL which leads drm_agp_acquire() return NULL.
> -------------------------------------
> if (!dev->agp)
> return -ENODEV;
> -------------------------------------
> But for UMS driver, it does not return such error, so I still need
> investigate how UMS driver deals with that.
>
> Thanks,
> Frank
I am wondering if a DRM API needs to be called that tests the device to see if
it is an AGP device.
At least from PCI configuration space registers, there is a way to tell this.
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