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/enable 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_display.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 uvcvideo snd_hda_intel(+) videobuf2_vmalloc parport videobuf2_memops pcspkr snd_hda_controller rfkill i915(+) sdhci_pci videobuf2_core firewire_ohci snd_hda_codec ahci intel_ips libahci video videodev i2c_i801 snd_hwdep sdhci libata 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-rc3-00206-g885ac04 #1
> [ 11.168332] Hardware name: LENOVO 25222AU/25222AU, BIOS 6IET52WW (1.12 ) 02/16/2010
> [ 11.168336] 0000000000000009 ffff880076fa1308 ffffffff8183c279 ffff880076fa1350
> [ 11.168338] ffff880076fa1340 ffffffff81069c7d 0000000000000000 0000000000000001
> [ 11.168341] 00000000000c200c 00000000000f0018 0000000000060100 ffff880076fa13a0
> [ 11.168342] Call Trace:
> [ 11.168351] [<ffffffff8183c279>] dump_stack+0x4d/0x66
> [ 11.168357] [<ffffffff81069c7d>] warn_slowpath_common+0x7d/0xa0
> [ 11.168360] [<ffffffff81069cec>] warn_slowpath_fmt+0x4c/0x50
> [ 11.168399] [<ffffffffa0207e47>] ? gen5_read32+0x57/0xd0 [i915]
> [ 11.168438] [<ffffffffa020e383>] assert_plane+0x83/0x90 [i915]
> [ 11.168478] [<ffffffffa0216bfe>] 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 Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Fri Apr 25 22:12:07 2014 +0300
drm/i915: Fix assert_plane warning during FDI link train
--
Ville Syrjälä
Intel OTC
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