From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Wouter M. Koolen" Subject: Re: [3.4 regression] [bisected] DisplayPort fails to come on Date: Thu, 14 Jun 2012 18:14:43 +0100 Message-ID: <4FDA1C03.3020404@cwi.nl> References: <4FD9E69A.4090708@cwi.nl> <4FD9F9B0.9030204@cwi.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4FD9F9B0.9030204@cwi.nl> Sender: linux-kernel-owner@vger.kernel.org To: "Wouter M. Koolen" Cc: Daniel Vetter , Dave Airlie , intergalactic.anonymous@gmail.com, len.brown@intel.com, "linux-kernel@vger.kernel.org" , dri-devel , "Barnes, Jesse" , "Wilson, Chris" List-Id: dri-devel@lists.freedesktop.org On 06/14/2012 03:48 PM, Wouter M. Koolen wrote: > In the mean while I will redo the bisect. Hi guys, I did a bisect on the actual problem (and not on the maybe-related second error message). It results in 092945e11c5b84f66dd08f0b87fb729715d377bc: Author: Adam Jackson 2011-07-26 20:39:45 Committer: Daniel Vetter 2012-01-17 15:46:56 Parent: 6919132e7a307b1f181d7655b3ef64cc7581a5ef (drm/i915/dp: Tweak auxch clock divider for PCH) Branches: linux-3.4.y, remotes/origin/linux-3.4.y, remotes/origin/master Follows: v3.2-rc6 Precedes: v3.4-rc1 drm/i915/dp: Use auxch precharge value of 5 everywhere The default in the Sandybridge docs is 5, as on Ironlake, and I have no reason to believe 3 would work any better. Signed-off-by: Adam Jackson Acked-by: Jesse Barnes Signed-off-by: Daniel Vetter I guess there is your reason for 3 :) Any advice on how to proceed would be very helpful. Cheers, Wouter