Ville Syrjälä <ville.syrjala@linux.intel.com> writes:

> I was mostly thinking of the 'seq = query(); wait(seq + n);' pattern
> where we can avoid doing the full update more than once if we enable
> the interrupt already during the query.

Don't we still wait 5 seconds before disabling vblank? In that case, the
chances of hitting an idle vblank are pretty slim if the application is
actually busy.

-- 
-keith