Re: [PATCH v5 09/44] drm: handle HAS_IOPORT dependencies

Arnd Bergmann
2023-05-22T13:07:11Z

On Mon, May 22, 2023, at 14:38, Thomas Zimmermann wrote:
> Am 22.05.23 um 12:50 schrieb Niklas Schnelle:

>> There is also a direct and hard coded use in cirrus.c which according to
>> the comment is only necessary during resume. Let's just skip this as
>> for example s390 which doesn't have I/O port support also doesen't
>> support suspend/resume.
>
> I think we should consider making cirrus depend on HAS_IOPORT. The
> driver is only for qemu's cirrus emulation, which IIRC can only be
> enabled for i586. And it has all been deprecated long ago.

I tried it out in arm64 debvm, and both the kernel and Xorg drivers
are detected just fine according to the log. I only get a black
screen, which could be the result of a missing VGA BIOS or the missing
unblank Port I/O in the driver (I doubt the VGA ports are hooked up
on arm64 qemu), but there is a good chance that it's currently
working for someone else.

Arnd