On Dec 27, 2010, at 12:16 PM, Ville Syrj?l? wrote: > On Mon, Dec 27, 2010 at 12:58:10AM +0100, Mario Kleiner wrote: > >> 2. There are gpu's firing spurious vblank irq's as soon as you enable >> irq's > > You're sure this isn't simply a matter of the driver forgetting to ack > the irq just before enabling it? >
Good point. This was on radeon. I can't remember for certain if it happened always, or only frequently. I can check that later this week when i'm back at the test machine. Anyway, it's good to be robust against such problems, regardless if it is gpu quirks or driver bugs. The current implementation would filter the redundant vblank irq and DRM_DEBUG a message if the drm.debug parameter is set. thanks, -mario > -- > Ville Syrj?l? > syrjala at sci.fi > http://www.sci.fi/~syrjala/ ********************************************************************* Mario Kleiner Max Planck Institute for Biological Cybernetics Spemannstr. 38 72076 Tuebingen Germany e-mail: mario.kleiner at tuebingen.mpg.de office: +49 (0)7071/601-1623 fax: +49 (0)7071/601-616 www: http://www.kyb.tuebingen.mpg.de/~kleinerm ********************************************************************* "For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled." (Richard Feynman)
