From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:48876 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760023AbdAIMHN (ORCPT ); Mon, 9 Jan 2017 07:07:13 -0500 Subject: Patch "drm/i915: tune down the fast link training vs boot fail" has been added to the 4.9-stable tree To: daniel.vetter@ffwll.ch, daniel.vetter@intel.com, gregkh@linuxfoundation.org, jani.nikula@intel.com, torvalds@linux-foundation.org, ville.syrjala@linux.intel.com Cc: , From: Date: Mon, 09 Jan 2017 13:07:24 +0100 Message-ID: <148396364422017@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled drm/i915: tune down the fast link training vs boot fail to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-i915-tune-down-the-fast-link-training-vs-boot-fail.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 2c57b18adb93fc070039538f1ce375d3d3e99bbb Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 13 Dec 2016 20:54:14 +0100 Subject: drm/i915: tune down the fast link training vs boot fail MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Daniel Vetter commit 2c57b18adb93fc070039538f1ce375d3d3e99bbb upstream. It's been unfixed since a while and no one is immediately working on this. And we have the FIXME already. And now also a task in the DP team's backlog. Cc: Linus Torvalds Cc: stable@vger.kernel.org Cc: Ville Syrjälä References: https://lists.freedesktop.org/archives/intel-gfx/2016-July/101951.html Acked-by: Ville Syrjälä [danvet: Adjust comment per Ville's feedback.] Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20161213195414.28923-1-daniel.vetter@ffwll.ch Signed-off-by: Greg Kroah-Hartman (cherry picked from commit 2dd85aeb5bc99e3763dd192cdb95ff405a102c8a) Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/intel_dp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -4019,8 +4019,8 @@ intel_dp_check_link_status(struct intel_ return; /* FIXME: we need to synchronize this sort of stuff with hardware - * readout */ - if (WARN_ON_ONCE(!intel_dp->lane_count)) + * readout. Currently fast link training doesn't work on boot-up. */ + if (!intel_dp->lane_count) return; /* if link training is requested we should perform it always */ Patches currently in stable-queue which might be from daniel.vetter@ffwll.ch are queue-4.9/drm-i915-tune-down-the-fast-link-training-vs-boot-fail.patch