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From: Jani Nikula <jani.nikula@linux.intel.com>
To: Paul Bolle <pebolle@tiscali.nl>,
	Andrey Skvortsov <andrej.skvortzov@gmail.com>
Cc: "Daniel Vetter" <daniel.vetter@intel.com>,
	"David Airlie" <airlied@linux.ie>,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	linux-kernel@vger.kernel.org,
	"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
	"Matt Roper" <matthew.d.roper@intel.com>
Subject: Re: [BISECTED REGRESSION in 3.19-rc1] [drm/i915] WARNING: drivers/gpu/drm/drm_irq.c:1077 drm_wait_one_vblank
Date: Mon, 23 Feb 2015 14:45:26 +0200	[thread overview]
Message-ID: <87egpgre3d.fsf@intel.com> (raw)
In-Reply-To: <1424092249.7482.10.camel@tiscali.nl>

On Mon, 16 Feb 2015, Paul Bolle <pebolle@tiscali.nl> wrote:
> I still see this on v3.19. I booted with drm.debug=0x4. The almost 2K
> lines in dmesg containing either "[drm" or this WARNING are pasted
> below. I really know nothing about all this, but I do note that only the
> WARNINGS are preceded by:
>     [drm:intel_calculate_wm] FIFO watermark level: -5
>     [drm:i9xx_update_wm] FIFO watermarks - A: 26, B: 8
>
> But perhaps that's another symptom of the same issue. A bit of staring
> at the code couldn't help me determine that.
>
> Perhaps these debug messages help someone in discovering what might be
> going on here.

Please try v4.0-rc1 or try cherry-picking this on top of v3.19 and
report back:

commit f9b61ff6bce9a44555324b29e593fdffc9a115bc
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Jan 7 13:54:39 2015 +0100

    drm/i915: Push vblank enable/disable past encoder->enable/disable

BR,
Jani.



-- 
Jani Nikula, Intel Open Source Technology Center

  reply	other threads:[~2015-02-23 12:44 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-31 21:16 Andrey Skvortsov
2015-02-04 12:32 ` Paul Bolle
2015-02-04 17:26   ` Andrey Skvortsov
2015-02-16 13:10     ` Paul Bolle
2015-02-23 12:45       ` Jani Nikula [this message]
2015-02-23 12:54         ` Jani Nikula
2015-02-23 20:28           ` Andrey Skvortsov
2015-02-24  7:45             ` Jani Nikula
2015-02-23 19:52         ` Andrey Skvortsov

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