[RFC] Remove AGP support from Radeon/Nouveau/TTM
alexdeucher at gmail.com
Mon May 11 20:46:19 UTC 2020
On Mon, May 11, 2020 at 4:41 PM John Paul Adrian Glaubitz
<glaubitz at physik.fu-berlin.de> wrote:
> On 5/11/20 10:05 PM, Alex Deucher wrote:
> >>> For Nouveau I'm not 100% sure, but from the code it of hand looks like we can do it similar to Radeon.
> >>> Please comment what you think about this.
> >> I would be against such a move as AGP graphics is still used by people running the powerpc
> >> and ppc64 Debian ports on their vintage hardware .
> >> I have also CC'ed the debian-powerpc mailing list so that other users can voice their
> >> opinion.
> > Note there is no loss of functionality here, at least on radeon
> > hardware. It just comes down to which MMU gets used for access to
> > system memory, the AGP MMU on the chipset or the MMU built into the
> > GPU. On powerpc hardware, AGP has been particularly unstable, and
> > IIRC, AGP has been disabled by default on radeon on powerpc for a
> > while.
> Do you have a code reference at hand for this bit of information (AGP
> being disabled on Macs)?
It was disabled 2 years ago:
> .''`. John Paul Adrian Glaubitz
> : :' : Debian Developer - glaubitz at debian.org
> `. `' Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
> `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
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