From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= <ville.syrjala@linux.intel.com>
Subject: Re: [PATCH 2/2] drm/i915: Use RCS flips on Ivybridge+
Date: Wed, 4 Sep 2013 12:49:24 +0300
Message-ID: <20130904094924.GP11428@intel.com>
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To: Daniel Vetter <daniel@ffwll.ch>
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>, Stephane Marchesin <marchesin@icps.u-strasbg.fr>, Ben Widawsky <ben@bwidawsk.net>
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On Wed, Sep 04, 2013 at 11:41:57AM +0200, Daniel Vetter wrote:
> On Wed, Sep 4, 2013 at 11:28 AM, Lee, Chon Ming <chon.ming.lee@intel.com>=
 wrote:
> > This patch causes VLV hang, look like ring buffer lockup.
> >
> > This is the message.
> > [drm] stuck on render ring
> >
> > I haven't look at the bspec for the different between VLV and Ivybridge=
 on this
> > yet.  Just see anyone have any clue why this might fail in VLV.
> =

> I guess there's no DERRMR register on vlv? If that's the case I think
> we just need to disable rcs flips on vlv.

There's the DPFLIPSTAT register. But my understanding was that it only
affects flip done signalling for MI_WAIT stuff. Worth a shot maybe
anyway.

-- =

Ville Syrj=E4l=E4
Intel OTC