[Intel-gfx] [PATCH 00/10] gmbus/dp aux irqfication

[Chris Wilson]

On Sat, 01 Dec 2012 16:47:46 +0000, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> On Sat,  1 Dec 2012 13:53:39 +0100, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> > Hi all,
> > 
> > Irq-drive gmbus/dp aux transfer, simply because we can (and at least in the case
> > of gmbus, it's quite a bit faster than the msleep(1) loop - we now reliably
> > transfer at full wire speed insteaf of sometimes 2-3x slower).
> > 
> > Compared to the older version I've floated on irc way back and which Chris has
> > carried around in his wip branchs (and inflicted upon tons of unsuspecting bug
> > reporters) there are a few differences:
> > - handle the hpd vs. setup race - even the current code enables hpd processing
> >   before the fbdev is set up, which is too early.
> > - fix the gen4 gmbus support, was totally busted.
> > - tested on hsw (although all the relevant bits are a 100% match with cpt/ivb).
> > - disable dp aux irq on vlv - too complicated to get at the docs (moved again,
> >   old access revoked) and I don't have the hw.
> > 
> > While reviewing this patch series I've also noticed two small things in the irq
> > handling code in general, patches for that at the beginning of the series.
> > 
> > Comment&review highgly welcome.
> 
> gm45 appears to be functioning big time, good start. The init sequence
> looks less convoluted and better understood now, so I am reasonably
> happy with this series. Will report back later after more testing.

ilk: [    0.698644] [drm:intel_dp_aux_wait_done] *ERROR* dp aux hw did
not signal timeout (has irq: 1)! and slow
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre