Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752624AbdFNWRB (ORCPT ); Wed, 14 Jun 2017 18:17:01 -0400 Received: from emh03.mail.saunalahti.fi ([62.142.5.109]:36438 "EHLO emh03.mail.saunalahti.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752589AbdFNWQ7 (ORCPT ); Wed, 14 Jun 2017 18:16:59 -0400 X-Greylist: delayed 322 seconds by postgrey-1.27 at vger.kernel.org; Wed, 14 Jun 2017 18:16:58 EDT Date: Thu, 15 Jun 2017 01:11:33 +0300 From: Aaro Koskinen To: Peter Ujfalusi , Tomi Valkeinen , Tony Lindgren , linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [BISECTED, REGRESSION] v4.12-rc: omapdrm fails to probe on Nokia N900 Message-ID: <20170614221133.k7gmbzzjsbmbjgbc@darkstar.musicnaut.iki.fi> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 915 Lines: 27 Hi, When booting v4.12-rc5 on Nokia N900, omapdrm fails to probe and there is no display. Bisected to: a09d2bc1503508c17ef3a71c6b1905e3660f3029 is the first bad commit commit a09d2bc1503508c17ef3a71c6b1905e3660f3029 Author: Peter Ujfalusi Date: Tue May 3 22:08:01 2016 +0300 drm/omap: Use omapdss_stack_is_ready() to check that the display stack is up Instead of 'guessing' based on aliases of the status of the DSS drivers, use the new interface to check that all needed drivers are loaded. In this way we can be sure that all needed drivers are loaded so it is safe to continue the probing of omapdrm. This method will allow the omapdrm to be probed 'headless', without outputs. Signed-off-by: Peter Ujfalusi Signed-off-by: Tomi Valkeinen Reverting the commit seems to fix the issue. A.