[Intel-gfx] [PATCH] drm/i915: fixup assert_pipe to take the pipe A quirk into account

[Daniel Vetter]

On Tue, Jan 24, 2012 at 10:24:21AM -0800, Jesse Barnes wrote:
> On Mon, 23 Jan 2012 20:40:27 +0100
> Daniel Vetter <daniel at ffwll.ch> wrote:
> 
> > On Sat, Jan 21, 2012 at 08:36:38PM -0800, Keith Packard wrote:
> > > On Sun, 22 Jan 2012 01:36:48 +0100, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> > > > This was completely spamming dmesg on my i855gm.
> > > 
> > > This comes from intel_disable_pll, which wants to turn the pll off, but
> > > if the pipe is still active, it won't be able to. This seems bad to me.
> > 
> > I honestly can't reconcile your comment with the code&patch. Afaics
> > - the pll disable code checks for the pipe a quirk and does an early exit
> >   before mucking around with the hw and calling assert_pipe.
> > - assert_pipe only does a WARN and the patch only changes whether we hit
> >   that WARN. All reg reads/writes should be unchanged.
> > - the backtrace I'm seeing goes through crtc_disable.
> 
> Ah ok so it's coming from the new pipe disabled check Chris added.
> Patch looks fine... and reminds me to be puzzled about the pipe a force
> quirk on 855. :)

Ok, I've queued this for next with an improved commit msg stating that
this was only shortly introduced in -next (plus citing the offending
commit).

Thanks, Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48