From mboxrd@z Thu Jan  1 00:00:00 1970
From: James Bottomley <James.Bottomley@HansenPartnership.com>
Subject: Re: Bad flicker on skylake HQD due to code in the 4.7
 merge window
Date: Thu, 16 Jun 2016 15:42:12 -0700
Message-ID: <1466116932.2257.4.camel@HansenPartnership.com>
References: <1464638381.2240.3.camel@HansenPartnership.com>
 <871t4ibr7k.fsf@intel.com> <1464701638.2234.1.camel@HansenPartnership.com>
 <87mvmp9z03.fsf@intel.com> <1466111747.2311.1.camel@HansenPartnership.com>
 <CAKMK7uGCn6rWGArnOah8bWojkWRdTPr8LeSdJb8iBojh8bHs-w@mail.gmail.com>
 <1466112547.2311.3.camel@HansenPartnership.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
In-Reply-To: <1466112547.2311.3.camel@HansenPartnership.com>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/intel-gfx>
List-Post: <mailto:intel-gfx@lists.freedesktop.org>
List-Help: <mailto:intel-gfx-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=subscribe>
Errors-To: intel-gfx-bounces@lists.freedesktop.org
Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>, Rodrigo Vivi <rodrigo.vivi@intel.com>, dri-devel <dri-devel@lists.freedesktop.org>, linux-kernel <linux-kernel@vger.kernel.org>
List-Id: dri-devel@lists.freedesktop.org
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From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1754331AbcFPWmQ (ORCPT <rfc822;w@1wt.eu>);
	Thu, 16 Jun 2016 18:42:16 -0400
Received: from bedivere.hansenpartnership.com ([66.63.167.143]:60440 "EHLO
	bedivere.hansenpartnership.com" rhost-flags-OK-OK-OK-OK)
	by vger.kernel.org with ESMTP id S1754087AbcFPWmP (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Thu, 16 Jun 2016 18:42:15 -0400
Message-ID: <1466116932.2257.4.camel@HansenPartnership.com>
Subject: Re: [Intel-gfx] Bad flicker on skylake HQD due to code in the 4.7
 merge window
From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: Jani Nikula <jani.nikula@linux.intel.com>,
        intel-gfx <intel-gfx@lists.freedesktop.org>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Rodrigo Vivi <rodrigo.vivi@intel.com>
Date: Thu, 16 Jun 2016 15:42:12 -0700
In-Reply-To: <1466112547.2311.3.camel@HansenPartnership.com>
References: <1464638381.2240.3.camel@HansenPartnership.com>
	 <871t4ibr7k.fsf@intel.com> <1464701638.2234.1.camel@HansenPartnership.com>
	 <87mvmp9z03.fsf@intel.com> <1466111747.2311.1.camel@HansenPartnership.com>
	 <CAKMK7uGCn6rWGArnOah8bWojkWRdTPr8LeSdJb8iBojh8bHs-w@mail.gmail.com>
	 <1466112547.2311.3.camel@HansenPartnership.com>
Content-Type: text/plain; charset="UTF-8"
X-Mailer: Evolution 3.16.5 
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Thu, 2016-06-16 at 14:29 -0700, James Bottomley wrote:
> On Thu, 2016-06-16 at 23:24 +0200, Daniel Vetter wrote:
> > I guess we'll need the bisect on this one to make progress.
> 
> Sigh, I was afraid that might be the next step.

OK, I have a curious data point.  I assumed the problem would be
somewhere in the drm update, so I started bisecting that at the top. 
 However, the top most commit:

commit 1d6da87a3241deb13d073c4125d19ed0e5a0c62c
Merge: 1f40c49 a39ed68
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Mon May 23 11:48:48 2016 -0700

    Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

Isn't actually bad.  There's no flicker here, so whatever caused the
problem came from some update after this.

James