Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752643AbbBWMxh (ORCPT ); Mon, 23 Feb 2015 07:53:37 -0500 Received: from mga14.intel.com ([192.55.52.115]:16733 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752545AbbBWMxg (ORCPT ); Mon, 23 Feb 2015 07:53:36 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,630,1418112000"; d="scan'208";a="681972022" From: Jani Nikula To: Paul Bolle , Andrey Skvortsov Cc: Daniel Vetter , David Airlie , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Ville =?utf-8?B?U3lyasOkbMOk?= , Matt Roper Subject: Re: [BISECTED REGRESSION in 3.19-rc1] [drm/i915] WARNING: drivers/gpu/drm/drm_irq.c:1077 drm_wait_one_vblank In-Reply-To: <87egpgre3d.fsf@intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20150131211609.GA3710@yulia-desktop> <1423053134.30076.12.camel@tiscali.nl> <20150204172645.GA2623@crion86> <1424092249.7482.10.camel@tiscali.nl> <87egpgre3d.fsf@intel.com> User-Agent: Notmuch/0.19+54~g59142f6 (http://notmuchmail.org) Emacs/24.4.1 (x86_64-pc-linux-gnu) Date: Mon, 23 Feb 2015 14:54:47 +0200 Message-ID: <87bnkkrdns.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1447 Lines: 42 On Mon, 23 Feb 2015, Jani Nikula wrote: > On Mon, 16 Feb 2015, Paul Bolle 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 > Date: Wed Jan 7 13:54:39 2015 +0100 > > drm/i915: Push vblank enable/disable past encoder->enable/disable https://bugs.freedesktop.org/show_bug.cgi?id=89108 > > BR, > Jani. > > > > -- > Jani Nikula, Intel Open Source Technology Center -- Jani Nikula, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/