Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932617AbcCBV6k (ORCPT ); Wed, 2 Mar 2016 16:58:40 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:59330 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932525AbcCBV6i (ORCPT ); Wed, 2 Mar 2016 16:58:38 -0500 Subject: Re: [4.4-rc1][Regression] drm/i915: Check live status before reading edid To: Jani Nikula , sonika.jindal@intel.com References: <56CE22DB.6050108@canonical.com> <87lh63uago.fsf@intel.com> Cc: shashank.sharma@intel.com, rodrigo.vivi@intel.com, Daniel Vetter , David Airlie , intel-gfx , dri-devel , LKML From: Joseph Salisbury Message-ID: <56D76208.7020702@canonical.com> Date: Wed, 2 Mar 2016 16:58:32 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 MIME-Version: 1.0 In-Reply-To: <87lh63uago.fsf@intel.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1873 Lines: 58 On 02/29/2016 04:33 AM, Jani Nikula wrote: > On Wed, 24 Feb 2016, Joseph Salisbury wrote: >> Hi Sonika, >> >> A kernel bug report was opened against Ubuntu [0]. After a kernel >> bisect, it was found that reverting the following commit resolved this bug: >> >> commit 237ed86c693d8a8e4db476976aeb30df4deac74b >> Author: Sonika Jindal >> Date: Tue Sep 15 09:44:20 2015 +0530 >> >> drm/i915: Check live status before reading edid >> >> >> >> The regression was introduced as of v4.4-rc1. >> >> I was hoping to get your feedback, since you are the patch author. Do >> think increasing the number of tries in intel_hdmi_detect() is worth >> trying? Do you think gathering any additional data will help diagnose >> this issue, or would it be best to submit a revert request? Thanks for the info. I will have all of these commits tested. > There are at least the following commits claiming to fix issues in the > above commit. Please make sure you have them. > > BR, > Jani. > > > commit 8d409cb3e8a24196be7271defafd4638f3e0b514 > Author: Ville Syrjälä > Date: Wed Feb 10 19:59:05 2016 +0200 > > drm/i915: Fix hpd live status bits for g4x > > commit 3d8acd1f667b45c531401c8f0c2033072e32a05d > Author: Gary Wang > Date: Wed Dec 23 16:11:35 2015 +0800 > > drm/i915: increase the tries for HDMI hotplug live status checking > > commit 97f9010af05c15e0b7e6b4ef6ff8cb0ebb7e7715 > Author: Daniel Vetter > Date: Fri Dec 11 19:44:15 2015 +0100 > > drm/i915: mdelay(10) considered harmful > > commit 0f5a9be15797f78c9a34e432f26c796165b6e49a > Author: Imre Deak > Date: Fri Nov 27 18:55:29 2015 +0200 > > drm/i915: take a power domain reference while checking the HDMI live status > > > >