From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7C231C34026 for ; Tue, 18 Feb 2020 11:48:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 580C0207FD for ; Tue, 18 Feb 2020 11:48:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726512AbgBRLsi (ORCPT ); Tue, 18 Feb 2020 06:48:38 -0500 Received: from isilmar-4.linta.de ([136.243.71.142]:53698 "EHLO isilmar-4.linta.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726043AbgBRLsh (ORCPT ); Tue, 18 Feb 2020 06:48:37 -0500 X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES Received: from light.dominikbrodowski.net (brodo.linta [10.1.0.102]) by isilmar-4.linta.de (Postfix) with ESMTPSA id 41890200ADE; Tue, 18 Feb 2020 11:48:36 +0000 (UTC) Received: by light.dominikbrodowski.net (Postfix, from userid 1000) id 5120920A8D; Tue, 18 Feb 2020 12:48:21 +0100 (CET) Date: Tue, 18 Feb 2020 12:48:21 +0100 From: Dominik Brodowski To: Boris Brezillon , jose.souza@intel.com, s.zharkoff@gmail.com, gwan-gyeong.mun@intel.com, jani.nikula@intel.com Cc: narmstrong@baylibre.com, laurent.pinchart@ideasonboard.com, jernej.skrabec@siol.net, jonas@kwiboo.se, linux-kernel@vger.kernel.org, airlied@redhat.com Subject: lockup on boot -- drm/i915/display: Force the state compute phase once to enable PSR Message-ID: <20200218114821.GA2240@light.dominikbrodowski.net> References: <20200217200942.GA2433@light.dominikbrodowski.net> <20200217220852.55cbac43@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200217220852.55cbac43@collabora.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 17, 2020 at 10:08:52PM +0100, Boris Brezillon wrote: > On Mon, 17 Feb 2020 21:09:42 +0100 > Dominik Brodowski wrote: > > > On my old Dell XPS 13 laptop with > > > > 00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09) > > 00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09) (prog-if 00 [VGA controller]) > > > > booting 5.6-rc1 and -rc2 fails after the dmesg line > > > > fb0: switching to inteldrmfb from simple > > > > while the next lines should be something like (v5.5): > > > > Console: switching to colour dummy device 80x25 > > i915 0000:00:02.0: vgaarb: deactivate vga console > > [drm] ACPI BIOS requests an excessive sleep of 25000 ms, using 1500 ms instead > > [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). > > [drm] Driver supports precise vblank timestamp query. > > i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem > > > > A git bisect lead to > > > > commit b86d895524ab ("drm/bridge: Add an ->atomic_check() hook") > > This commit has been reverted: you should ignore any failures between > b86d895524ab ("drm/bridge: Add an ->atomic_check() hook") and > 099126352303 ("Revert "drm/bridge: Add a drm_bridge_state object"). A new bisect now points to 60c6a14b489b ("drm/i915/display: Force the state compute phase once to enable PSR"). Please note that bisecting this is quite a hassle, in particular due to various reverts in between and back-merges (such as ec027b33c8bb, which has two parents in "bad" state). As 60c6a14b489b does not revert cleanly, I can't test a revert on top of 5.6-rc2. Thanks, Dominik