Re: Status of the FB drivers on m68k
Hi Geert!
On 10/11/2017 09:24 AM, Geert Uytterhoeven wrote:
I am currently discussing the topic of usable graphics cards on Debian/m68k
on the German Amiga forum a1k.org since one user asked me [1] and he told
me that in the past, users could use CONFIG_FB_CYBER and CONFIG_FB_VIRGE
which both seem gone, sadly.
CyberVision 64, CyberVision 64/3D, and Retina/Z3 support were removed in
commit e019630e78e3482c ("[PATCH] remove broken video drivers").
All of them were marked broken before because they needed an update
for the new fbdev framework, cfr. e.g full-history-linux
commit 6764ca1a7c58dc5f07bd730000a4c40be4ef9f00
Author: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Sun Sep 28 20:02:47 2003 -0700
[PATCH] Amiga Cybervision 64/3D frame buffer device is broken
Amiga Cybervision 64/3D frame buffer device is broken (needs update to new
fbdev framework)
Ok, thanks.
Also, the CONFIG_FB_PM2 driver is marked as broken [2].
From full-history-linux:
commit a05cb1584100212ae8b20a8026dac1f814760158
Author: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Mon Apr 12 17:29:57 2004 -0700
[PATCH] Pm2fb is broken on Amiga
Permedia2: Mark pm2fb broken on Amiga, until somebody fixes it (pm2fb.c
explicitly tests for CONFIG_PCI right now)
Is there a chance to bring the CYBER and VIRGE drivers back? And maybe
get PM2 working on m68k?
There's always a chance ;-)
You "just" need someone with the hardware, programming skills, and a
strong desire to get it working again.
So, I have already someone from Berlin who is going to give me exactly these
three boards for kernel development and testing \o/.
For CyberVision 64, CyberVision 64/3D, and Retina/Z3, the amount of work
shouldn't be that big. Just revert commit e019630e78e3482c, and look how
other fbdev driver were converted to the new framework.
Alright. I hope you, Michael Schmitz and Michael Karcher will be around
to help :-). I will have my A4000 set up by next week, equipped with
a Buddha, an X-Surf100 and the various graphics cards (one at a time).
However, in the mean time another S3 Trio / Virge driver was added, so it
may make more sense to add Amiga support to the latter. But as I expect
that driver to contain many PC-isms, and rely on the BIOS having initialized
the graphics chip first, reviving FB_CYBER and FB_VIRGE as a first step,
may be the best approach.
Ok, we'll see.
I expect fixing Permedia2 to be much harder...
Ok, I guess the next things to be done then are:
- Michael Schmitz' ESP driver fixes for the Cyberstorm SCSI
- Michael Karcher's xsurf100 driver
- fixing Cybervision 64, 64/3D, Retina Z3
Might also be an idea to have another Linux/m68k meeting to
get these things done :-).
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaubitz@debian.org
`. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
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