Date:	Wed, 9 Sep 2015 04:42:21 +0200
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Daniel Vetter <daniel.vetter@...ll.ch>,
	Jani Nikula <jani.nikula@...ux.intel.com>
Cc:	intel-gfx <intel-gfx@...ts.freedesktop.org>,
	DRI <dri-devel@...ts.freedesktop.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Chris Wilson <chris@...is-wilson.co.uk>
Subject: [Linux-v4.2-10463-g9a9952bbd76a] i915: WARNING: intel_display.c:1377 assert_planes_disabled

[ TO INTEL DRM DRIVERS maintainers ]

Hi,

out of curiosity and to play with the new bindeb-pkg make-target I
built pre-v4.3-rc1 (git-describe says v4.2-10463-g9a9952bbd76a)
Debian-kernel packages.

I see several bugs and call-traces.

Two hit a warning in i915 (one snippet here, full dmesg-log and
kernel-config are attached).

[   20.920943] ------------[ cut here ]------------
[   20.920982] WARNING: CPU: 0 PID: 114 at
drivers/gpu/drm/i915/intel_display.c:1377
assert_planes_disabled+0xe4/0x150 [i915]()
[   20.920983] plane A assertion failure, should be disabled but not
[   20.921023] Modules linked in: i915 mac80211 snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic uvcvideo snd_hda_intel
snd_hda_codec videobuf2_vmalloc videobuf2_memops videobuf2_core rfcomm
joydev bnep v4l2_common snd_hwdep iwlwifi videodev usb_storage
kvm_intel snd_hda_core parport_pc cfg80211 btusb i2c_algo_bit
drm_kms_helper ppdev btrtl btbcm snd_pcm btintel kvm bluetooth
snd_seq_midi psmouse snd_seq_midi_event snd_rawmidi syscopyarea
snd_seq sysfillrect sysimgblt fb_sys_fops drm snd_timer snd_seq_device
serio_raw samsung_laptop snd lpc_ich video soundcore wmi intel_rst
mac_hid lp parport binfmt_misc hid_generic usbhid hid r8169 mii
[   20.921026] CPU: 0 PID: 114 Comm: kworker/u16:5 Not tainted
4.2.0-10463.1-iniza-small #1
[   20.921027] Hardware name: SAMSUNG ELECTRONICS CO., LTD.
530U3BI/530U4BI/530U4BH/530U3BI/530U4BI/530U4BH, BIOS 13XK 03/28/2013
[   20.921033] Workqueue: events_unbound async_run_entry_fn
[   20.921037]  ffffffffa06a9d60 ffff8800378af718 ffffffff813df89b
ffff8800378af760
[   20.921039]  ffff8800378af750 ffffffff8107cdc6 ffff8800c2000000
0000000000000000
[   20.921042]  0000000000000000 ffff8800bf90b000 ffff8800bf90b000
ffff8800378af7b0
[   20.921043] Call Trace:
[   20.921046]  [<ffffffff813df89b>] dump_stack+0x4b/0x70
[   20.921050]  [<ffffffff8107cdc6>] warn_slowpath_common+0x86/0xc0
[   20.921052]  [<ffffffff8107ce4c>] warn_slowpath_fmt+0x4c/0x50
[   20.921081]  [<ffffffffa0634af4>] assert_planes_disabled+0xe4/0x150 [i915]
[   20.921106]  [<ffffffffa063e8bf>] intel_disable_pipe+0x4f/0x2d0 [i915]
[   20.921129]  [<ffffffffa063eeb5>] ironlake_crtc_disable+0x85/0x7d0 [i915]
[   20.921151]  [<ffffffffa063a9ce>] ?
intel_crtc_disable_planes+0xde/0xf0 [i915]
[   20.921176]  [<ffffffffa0647a58>] intel_atomic_commit+0x108/0x1370 [i915]
[   20.921192]  [<ffffffffa00f1957>] ? drm_atomic_check_only+0x1d7/0x5a0 [drm]
[   20.921205]  [<ffffffffa00f15c9>] ?
drm_atomic_get_connector_state+0x49/0x110 [drm]
[   20.921216]  [<ffffffffa00f1d57>] drm_atomic_commit+0x37/0x60 [drm]
[   20.921223]  [<ffffffffa02138aa>]
drm_atomic_helper_set_config+0x1ca/0x430 [drm_kms_helper]
[   20.921234]  [<ffffffffa00e13c5>]
drm_mode_set_config_internal+0x65/0x110 [drm]
[   20.921240]  [<ffffffffa021674e>] restore_fbdev_mode+0xbe/0xe0
[drm_kms_helper]
[   20.921246]  [<ffffffffa0218615>]
drm_fb_helper_restore_fbdev_mode_unlocked+0x25/0x70 [drm_kms_helper]
[   20.921251]  [<ffffffffa021868d>] drm_fb_helper_set_par+0x2d/0x50
[drm_kms_helper]
[   20.921280]  [<ffffffffa065dfba>] intel_fbdev_set_par+0x1a/0x60 [i915]
[   20.921283]  [<ffffffff8144e12e>] fbcon_init+0x53e/0x5d0
[   20.921286]  [<ffffffff814d32ca>] visual_init+0xca/0x130
[   20.921289]  [<ffffffff814d5877>] do_bind_con_driver+0x167/0x3a0
[   20.921292]  [<ffffffff814d5d5c>] do_take_over_console+0xac/0x1d0
[   20.921294]  [<ffffffff81449e27>] do_fbcon_takeover+0x57/0xb0
[   20.921296]  [<ffffffff8144ecd2>] fbcon_event_notify+0x752/0x860
[   20.921299]  [<ffffffff810a2ce5>] ? __blocking_notifier_call_chain+0x35/0x70
[   20.921301]  [<ffffffff810a2aed>] notifier_call_chain+0x5d/0x80
[   20.921304]  [<ffffffff810a2cfd>] __blocking_notifier_call_chain+0x4d/0x70
[   20.921306]  [<ffffffff810a2d36>] blocking_notifier_call_chain+0x16/0x20
[   20.921308]  [<ffffffff8145162b>] fb_notifier_call_chain+0x1b/0x20
[   20.921311]  [<ffffffff81453854>] register_framebuffer+0x204/0x330
[   20.921317]  [<ffffffffa02188e4>]
drm_fb_helper_initial_config+0x234/0x3b0 [drm_kms_helper]
[   20.921344]  [<ffffffffa065f15b>] intel_fbdev_initial_config+0x1b/0x20 [i915]
[   20.921346]  [<ffffffff810a4807>] async_run_entry_fn+0x37/0xe0
[   20.921349]  [<ffffffff8109a8b1>] process_one_work+0x1e1/0x620
[   20.921352]  [<ffffffff8109a826>] ? process_one_work+0x156/0x620
[   20.921353]  [<ffffffff8109b589>] worker_thread+0x69/0x480
[   20.921355]  [<ffffffff8109b520>] ? cancel_delayed_work_sync+0x20/0x20
[   20.921357]  [<ffffffff810a17ea>] kthread+0x10a/0x120
[   20.921360]  [<ffffffff810a16e0>] ? kthread_create_on_node+0x200/0x200
[   20.921364]  [<ffffffff817badef>] ret_from_fork+0x3f/0x70
[   20.921366]  [<ffffffff810a16e0>] ? kthread_create_on_node+0x200/0x200
[   20.921367] ---[ end trace 85fce5c152ff4528 ]---

Some intelgfx hardware infos (see attached Xorg.0.log)...

[    27.487] (--) intel(0): Integrated Graphics Chipset: Intel(R) HD
Graphics 3000
[    27.565] (II) intel(0): SNA initialized with Sandybridge (gen6, gt2) backend

Please have a look at it.

If this is a known issue, please let me know and kindly point me to a
patch (patchwork preferred) or commit-id in drm-intel Git.
( Sorry, I have not checked any mailing-lists or patchwork. )

If you need more infos, logs and/or debug material please let me know
and give clear instructions (especially for debugging).

Thanks.

Regards,
- Sedat -

View attachment "dmesg_4.2.0-10463.1-iniza-small.txt" of type "text/plain" (96708 bytes)

Download attachment "config-4.2.0-10463.1-iniza-small" of type "application/octet-stream" (130007 bytes)

View attachment "Xorg.0.log" of type "text/x-log" (22821 bytes)

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