On Wed, Jan 04, 2012 at 06:27:40PM -0800, Keith Packard wrote: > On Wed, 4 Jan 2012 19:40:45 +0100, Daniel Vetter <daniel.vetter at ffwll.ch> wrote: > > > Two things seem to do the trick on my ivb machine here: > > - prevent the gt from powering down while waiting for seqno > > notification interrupts by grabbing the force_wake in get_irq (and > > dropping it in put_irq again). > > - ordering writes from the ring's CS by reading a CS register, ACTHD > > seems to work. > > If this works reliably, you'll deserve a medal... I've removed the HWSTAM workaround on my branch and both my ivb and snb seem to still work. So I'm still hopeful that this actually works ;-) Ben promised to beat on it with his machines, too, but I fear Eric is way too busy with the finishing touches for the OGL 3.0 frenzy atm. -Daniel -- Daniel Vetter Mail: daniel at ffwll.ch Mobile: +41 (0)79 365 57 48
