-------- Original-Nachricht -------- > Datum: Wed, 18 Apr 2012 17:01:20 +0200 > Von: "Michel Dänzer" <mic...@daenzer.net> > An: Andreas Schwab <sch...@linux-m68k.org> > CC: o jordan <ojordan12...@hotmail.co.uk>, linuxppc-dev@lists.ozlabs.org > Betreff: Re: PowerPC radeon KMS - is it possible?
> On Mit, 2012-04-18 at 16:55 +0200, Andreas Schwab wrote: > > Michel Dänzer <mic...@daenzer.net> writes: > > > > > On Mit, 2012-04-18 at 16:28 +0200, Andreas Schwab wrote: > > >> Michel Dänzer <mic...@daenzer.net> writes: > > >> > > >> > Have you tried smaller aperture sizes (uninorth_agp.aperture) > > >> > and/or radeon.test=1? (See commit > > >> > 52f072cb084bbb460d3a4ae09f0b6efc3e7e8a8c) > > >> > > >> Neither changes anything. > > > > > > How small aperture sizes have you tried? > > > > 32M. With the old UMS driver 3D once worked fine ... > > That doesn't necessarily mean much per se, as with UMS memory is only > statically mapped into the AGP GART once (so most of those 32M are > wasted at least most of the time), whereas with KMS it's dynamically > (un)mapped on demand. That may be a stupid question, but is it allowed (for a DRM client or whatever does the mapping) to change the content of a page mapped into the AGP GART or is it necessary to explicitly unmap the page, change its content and map it again? I would say it's necessary to unmap the page first (sounds more like the pci_[un]map_page() approach) - at least when it should work with non-coherent architectures, too. Gerhard PS: Sorry for hijacking the thread. :-) -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev