Subject: Re: AGP bogosities
From: Martin Schlemmer <azarah@nosferatu.za.org>
Reply-To: Martin Schlemmer <azarah@nosferatu.za.org>
To: "J.A. Magallon" <jamagallon@able.es>
Cc: Dave Jones <davej@redhat.com>, Paul Mackerras <paulus@samba.org>,
       torvalds@osdl.org, benh@kernel.crashing.org,
       linux-kernel@vger.kernel.org
In-Reply-To: <1110581163l.5796l.0l@werewolf.able.es>
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	 <1110579068l.8904l.0l@werewolf.able.es> <20050311221838.GG4185@redhat.com>
	 <1110581163l.5796l.0l@werewolf.able.es>
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Date: Sat, 12 Mar 2005 01:16:31 +0200
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On Fri, 2005-03-11 at 22:46 +0000, J.A. Magallon wrote:
> On 03.11, Dave Jones wrote:
> > On Fri, Mar 11, 2005 at 10:11:08PM +0000, J.A. Magallon wrote:
> >  >=20
> >  > On 03.11, Paul Mackerras wrote:
> >  > > Linus,
> >  > >=20
> >  > ...
> >  > >=20
> >  > > Oh, and by the way, I have 3D working relatively well on my G5 wit=
h a
> >  > > 64-bit kernel (and 32-bit X server and clients), which is why I ca=
re
> >  > > about AGP 3.0 support. :)
> >  > >=20
> >  >=20
> >  > I think it is not a G5 only problem. I have a x8 card, a x8 slot, bu=
t
> >  > agpgart keeps saying this:
> >  >=20
> >  > Mar 11 23:00:28 werewolf dm: Display manager startup succeeded
> >  > Mar 11 23:00:29 werewolf kernel: agpgart: Found an AGP 3.0 compliant=
 device at 0000:00:00.0.
> >  > Mar 11 23:00:29 werewolf kernel: agpgart: reserved bits set in mode =
0xa. Fixed.
> >  > Mar 11 23:00:29 werewolf kernel: agpgart: X passes broken AGP2 flags=
 (2) in AGP3 mode. Fixed.
> >  > Mar 11 23:00:29 werewolf kernel: agpgart: Putting AGP V3 device at 0=
000:00:00.0 into 4x mode
> >  > Mar 11 23:00:29 werewolf kernel: agpgart: Putting AGP V3 device at 0=
000:01:00.0 into 4x mode
> >  > Mar 11 23:00:29 werewolf kernel: agpgart: Found an AGP 3.0 compliant=
 device at 0000:00:00.0.
> >  > Mar 11 23:00:29 werewolf kernel: agpgart: reserved bits set in mode =
0xa. Fixed.
> >  > Mar 11 23:00:29 werewolf kernel: agpgart: X passes broken AGP2 flags=
 (2) in AGP3 mode. Fixed.
> >  > Mar 11 23:00:29 werewolf kernel: agpgart: Putting AGP V3 device at 0=
000:00:00.0 into 4x mode
> >  > Mar 11 23:00:29 werewolf kernel: agpgart: Putting AGP V3 device at 0=
000:01:00.0 into 4x mode
> >  >=20
> >  > The nvidia driver (brand new 1.0-7167, now works with stock -mm) tel=
ls me
> >  > it is in x8 mode, but i suspect it lies....
> >  >=20
> >  > Will try your patch right now.
> >=20
>=20
> Looks fine, now I got:
>=20
> agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
> agpgart: Putting AGP V3 device at 0000:00:00.0 into 8x mode
> agpgart: Putting AGP V3 device at 0000:01:00.0 into 8x mode
> agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
> agpgart: Putting AGP V3 device at 0000:00:00.0 into 8x mode
> agpgart: Putting AGP V3 device at 0000:01:00.0 into 8x mode
>=20
> werewolf:~> lspci
> 00:00.0 Host bridge: Intel Corporation 82875P/E7210 Memory Controller Hub=
 (rev 02)
> 00:01.0 PCI bridge: Intel Corporation 82875P Processor to AGP Controller =
(rev 02)
> ...
> 01:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 52=
00] (rev a1)
>=20
> BTW, I had to patch the nVidia driver. It just tries up to x4 AGP...
>=20

New and old one works fine with Paul's patch:

--old--
agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
agpgart: X tried to set rate=3Dx12. Setting to AGP3 x8 mode.
agpgart: Putting AGP V3 device at 0000:00:00.0 into 8x mode
agpgart: Putting AGP V3 device at 0000:01:00.0 into 8x mode
-------

(ok, so old driver is a bit dodgy)

--new--
agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
agpgart: Putting AGP V3 device at 0000:00:00.0 into 8x mode
agpgart: Putting AGP V3 device at 0000:01:00.0 into 8x mode
-------


--=20
Martin Schlemmer


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