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Date:   Tue, 04 Apr 2017 10:14:51 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Christian Gmeiner <christian.gmeiner@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        DRI mailing list <dri-devel@...ts.freedesktop.org>
Subject: Re: imx-drm: vblank wait timed out

Hi Christian,

On Mon, 2017-04-03 at 17:16 +0200, Christian Gmeiner wrote:
> 2017-03-31 14:57 GMT+02:00 Philipp Zabel <p.zabel@...gutronix.de>:
> > Hi Christian,
> >
> > On Fri, 2017-03-31 at 12:44 +0200, Christian Gmeiner wrote:
> >> Hi
> >>
> >> I get this from time to time on a 4.9.17 kernel:
> >>
> >> [    3.353387] ------------[ cut here ]------------
> >> [    3.353408] WARNING: CPU: 0 PID: 1 at
> >> drivers/gpu/drm/drm_atomic_helper.c:1140
> >> drm_atomic_helper_wait_for_vblanks+0x240/0x244
> >> [    3.353412] [CRTC:24] vblank wait timed out
> > [...]
> >
> > Do the four patches in
> >  git://git.pengutronix.de/git/pza/linux.git tags/v4.9-ipu-dp-plane-fix
> > fix this?
> >
> 
> Sadly no - this is what I get after a warm-reboot:

Is this on a non-plus i.MX6? Maybe are missing the LDB DI clock glitch
fixes (commits 5d283b083800, 03d576f202e8, and f13abeff2cde)?

regards
Philipp

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