On Fri, Oct 11, 2013 at 12:50 PM, Alex Deucher <alexdeucher@xxxxxxxxx> wrote: > On Fri, Oct 11, 2013 at 12:33 AM, Ilia Mirkin <imirkin@xxxxxxxxxxxx> wrote: >> I was just looking at >> https://bugs.freedesktop.org/show_bug.cgi?id=20341 (see last comment). >> Basically he's able to to use the card with agpmode=2 but not the >> auto-detected agpmode=4. I also saw that the radeon driver has a large >> quirks list, and it seems silly to reproduce it in nouveau. >> >> However the quirks in the radeon driver are a bit odd -- they are per >> agp chipset/card chipset pair, rather than a blanket max speed for the >> whole agp chipset. I find this surprising, but I suppose I don't know >> that much about all this stuff. I was thinking for nouveau, it would >> just be at the agp chipset level. >> >> Do you guys think that it's reasonable to make the quirks list >> dependent on the agp chipset only? In that case, I can refactor and >> create The One True List (tm). Otherwise I'll just hack something into >> nouveau inspired by the radeon list. [Also for the single list, it >> might be better for the agpgart driver itself to know about the >> restrictions, but that's probably more refactoring than I care for.] >> >> Comments/suggestions/concerns appreciated. > > It's very much dependent on combinations of gpus and chipsets in my > experience. One could probably distill down the actual quirks to some > general chipset or GPU specific ones, but unfortunately AGP is getting > so old now that errata lists for old chipsets and GPUs are probably > hard to come by. I don't foresee any new AGP systems any time soon, > so I'm not sure it's worth putting too much effort into it. OK, so it sounds like the way forward is for me to compile a chipset -> maxspeed map for nouveau to use and leave radeon out of it. Ben/David -- does that sound acceptable to you guys? Basically I'd take the radeon list's chipsets and apply those maxima to all nouveau video cards (overridable with agpmode, of course). -ilia _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
