Christian Neumair wrote: > Dear DRI mailing list, > > I'm trying to make my Radeon Mobility M300 (probably PCIE) which is > reported as > > 01:00.0 VGA compatible controller: ATI Technologies Inc M22 [Radeon > Mobility M300] > > work with the EGL demos. This is because I'd like to help out with EGL > +MESA development. > > Now I'm totally stuck, and suppose I hit a few deeply-rooted problems > that I cannot solve without in-depth knowledge about DRM memory layout. > > DRI/Mesa are fresh GIT checkouts, I also had this problem with old CVS > builds. > > Such knowledge doesn't seem to be available publicly, and understanding > the details often requires one to have much previous knowledge about > graphic achitectures in general - which I suppose is often NDAed, as the > publicly available papers aren't too long. Feel free to prove me wrong, > I'm really interested in understanding GART, FB, VRAM, shared memory, > the DRM locking scheme and especially how they play together. > > The last two lines really look fishy. The basic problem seems to be that > in radeon_do_init_cp(), the > > drm_core_ioremap(&dev_priv->gart_info.mapping, dev); > > fails, i.e. the mapping's handle is NULL afterwards. > > I have no clue what's causing this. Maybe there has to be added special > code for dealing with PCIE cards that use shared memory. > > I'm really stuck here, thanks for any hints!
Well it doesn't use shared memory (oh and that's misnomer in the kernel, it a mobility X300, not M300). I've never looked at egl, but the problem may indeed be because it's a pcie card. Those needed special initialization in the xorg driver too (need the gart map in local framebuffer memory), you could probably get some ideas from there. Roland ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
