From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Subject: Re: [PATCH] drm/i915: make DP training try a little
 harder
Date: Thu, 6 Jan 2011 08:42:00 +0800
Message-ID: <20110106004200.GB2702@yliu-dev.sh.intel.com>
References: <1294170794-5334-1-git-send-email-jbarnes@virtuousgeek.org>
	<20110105075239.GA2702@yliu-dev.sh.intel.com>
	<20110105091919.6da339d9@jbarnes-desktop>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org>
Received: from mga11.intel.com (mga11.intel.com [192.55.52.93])
	by gabe.freedesktop.org (Postfix) with ESMTP id D2B329EFA7
	for <intel-gfx@lists.freedesktop.org>;
	Wed,  5 Jan 2011 16:43:30 -0800 (PST)
Content-Disposition: inline
In-Reply-To: <20110105091919.6da339d9@jbarnes-desktop>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/intel-gfx>,
	<mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://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: <http://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
	<mailto:intel-gfx-request@lists.freedesktop.org?subject=subscribe>
Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org
Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org
To: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org

On Wed, Jan 05, 2011 at 09:19:19AM -0800, Jesse Barnes wrote:

[snip]

> > 
> > And, FYI, the two patch would not fix bug
> > https://bugs.freedesktop.org/show_bug.cgi?id=32539
> > the train link still failed.
> 
> Does this one at least keep it from hanging?

Oh, sorry, wrong bug number :( , it's 29791.
> 
> If it doesn't actually help with suspend/resume, I wonder if we need to
> use fast link training on that machine.  The "use VBT provided values"
> patch did that, using the VBT pre-emphasis and vswing values, but we
> can also cache the last known good AUX handshake data and use that at
> resume time too.  Can you give that a try?