On Wed, 7 Dec 2011 10:38:41 -0800 Jesse Barnes <jbar...@virtuousgeek.org> wrote:
> On Wed, 07 Dec 2011 10:35:45 -0800 > Eric Anholt <e...@anholt.net> wrote: > > > On Sat, 22 Oct 2011 19:41:24 -0700, Ben Widawsky <b...@bwidawsk.net> wrote: > > > The docs say this is required for Gen7, and since the bit was added for > > > Gen6, we are also setting it there pit pf paranoia. Particularly as > > > Chris points out, if PIPE_CONTROL counts as a 3d state packet. > > > > > > This was found through doc inspection by Ken and applies to Gen6+; > > > > > > Cc: Keith Packard <kei...@keithp.com> > > > Reported-by: Kenneth Graunke <kenn...@whitecape.org> > > > Signed-off-by: Ben Widawsky <b...@bwidawsk.net> > > > Reviewed-by: Chris Wilson <ch...@chris-wilson.co.uk> > > > Reviewed-by: Daniel Vetter <daniel.vet...@ffwll.ch> > > > > Reviewed-by: Eric Anholt <e...@anholt.net> > > > > however, it doesn't appear to help Ivybridge IRQ troubles. > > You could try something like the below to force the use of PIPE_NOTIFY > instead. Only lightly tested on IVB when we had lots of other bugs, so > I'm not sure if it works at all. Though if it's the blit ring hanging, you'd have to try using a flush_dw notify (if such a thing exists) instead... I don't think the BLT ring gets much exercise outside Linux so there could well be some bugs. -- Jesse Barnes, Intel Open Source Technology Center
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