From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: [drm/i915] WARNING: CPU: 2 PID: 260 at drivers/gpu/drm/i915/intel_display.c:1151 assert_plane+0x83/0x90 [i915]() Date: Sat, 11 Oct 2014 17:11:51 +0300 Message-ID: <20141011141151.GM32511@intel.com> References: <20141011051743.GC21803@wfg-t540p.sh.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTP id 5955C6E2C4 for ; Sat, 11 Oct 2014 07:11:55 -0700 (PDT) Content-Disposition: inline In-Reply-To: <20141011051743.GC21803@wfg-t540p.sh.intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Fengguang Wu Cc: Daniel Vetter , intel-gfx@lists.freedesktop.org, lkp@01.org, LKML List-Id: intel-gfx@lists.freedesktop.org On Sat, Oct 11, 2014 at 01:17:43PM +0800, Fengguang Wu wrote: > Hi Ville, > = > FYI, we noticed the below changes on > = > commit a5c4d7bc187bd13bc11ac06bb4ea3a0d4001aa4d ("drm/i915: Disable/enabl= e planes as the first/last thing during modeset on ILK+") > = > = > +-------------------------+------------+------------+ > | | be6a6f8ec7 | a5c4d7bc18 | > +-------------------------+------------+------------+ > | boot_successes | 10 | 0 | > | boot_failures | 0 | 10 | > | BUG:kernel_test_crashed | 0 | 10 | > +-------------------------+------------+------------+ > = > = > [ 11.123997] ata1.00: configured for UDMA/100 > [ 11.124256] scsi 0:0:0:0: Direct-Access ATA FUJITSU MJA2250B = 0084 PQ: 0 ANSI: 5 > [ 11.168246] ------------[ cut here ]------------ > [ 11.168298] WARNING: CPU: 2 PID: 260 at drivers/gpu/drm/i915/intel_dis= play.c:1151 assert_plane+0x83/0x90 [i915]() > [ 11.168300] plane A assertion failure (expected on, current off) > [ 11.168326] Modules linked in: mxm_wmi thinkpad_acpi parport_pc uvcvid= eo snd_hda_intel(+) videobuf2_vmalloc parport videobuf2_memops pcspkr snd_h= da_controller rfkill i915(+) sdhci_pci videobuf2_core firewire_ohci snd_hda= _codec ahci intel_ips libahci video videodev i2c_i801 snd_hwdep sdhci libat= a drm_kms_helper wmi firewire_core snd_pcm crc_itu_t mmc_core snd_timer drm= snd soundcore acpi_cpufreq > [ 11.168330] CPU: 2 PID: 260 Comm: modprobe Not tainted 3.15.0-rc3-0020= 6-g885ac04 #1 > [ 11.168332] Hardware name: LENOVO 25222AU/25222AU, BIOS 6IET52WW (1.12= ) 02/16/2010 > [ 11.168336] 0000000000000009 ffff880076fa1308 ffffffff8183c279 ffff88= 0076fa1350 > [ 11.168338] ffff880076fa1340 ffffffff81069c7d 0000000000000000 000000= 0000000001 > [ 11.168341] 00000000000c200c 00000000000f0018 0000000000060100 ffff88= 0076fa13a0 > [ 11.168342] Call Trace: > [ 11.168351] [] dump_stack+0x4d/0x66 > [ 11.168357] [] warn_slowpath_common+0x7d/0xa0 > [ 11.168360] [] warn_slowpath_fmt+0x4c/0x50 > [ 11.168399] [] ? gen5_read32+0x57/0xd0 [i915] > [ 11.168438] [] assert_plane+0x83/0x90 [i915] > [ 11.168478] [] ironlake_fdi_link_train+0x6e/0x3d0 [= i915] Yeah I forgot about that bogus assert when doing that patch. But I did catch it later: commit 1c8562f66567807236c225d1518b0f034396f38a Author: Ville Syrj=E4l=E4 Date: Fri Apr 25 22:12:07 2014 +0300 drm/i915: Fix assert_plane warning during FDI link train -- = Ville Syrj=E4l=E4 Intel OTC