[Bug 211649] New: "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[Bug 211649] New: "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

            Bug ID: 211649
           Summary: "drm/amd/display: reuse current context instead of
                    recreating one" cause hdmi hotplug blackscreen on
                    amdgpu
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.11-rc7
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: youling257@gmail.com
        Regression: No

5.11-rc7 kernel,amdgpu 3400g, plug out hdmi, replug in hdmi, blackscreen.

the bad commit is 8866a67 drm/amd/display: reuse current context instead of
recreating one.

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

Alex Deucher (alexdeucher@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #1 from Alex Deucher (alexdeucher@gmail.com) ---
Please attach your xorg log (if using X) and your dmesg output.

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |nicholas.kazlauskas@amd.com

--- Comment #2 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) ---
Please reproduce the blackscreen issue and attach the following
logs/information:

- dmesg.log (with drm.debug=6 set as part of your modeline)
- Xorg.0.log if using X
- The name of your desktop environment - eg. GNOME, KDE, etc.

I'm unable to reproduce this locally on my end and it doesn't seem to have
applied generically to DCN21/DCN30 per Dan's test report.

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #3 from youling257@gmail.com ---
replug hdmi, [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]]
*ERROR* [CRTC:67:crtc-0] flip_done timed out


[  252.377374] [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]]
*ERROR* [CRTC:67:crtc-0] flip_done timed out

[  262.617295] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]]
*ERROR* [CRTC:67:crtc-0] flip_done timed out

[  270.268771] [drm] amdgpu_dm_irq_schedule_work FAILED src 2
[  272.857440] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]]
*ERROR* [PLANE:55:plane-3] flip_done timed out
[  272.906034] ------------[ cut here ]------------
[  272.906037] WARNING: CPU: 0 PID: 15 at
amdgpu_dm_atomic_commit_tail+0x2582/0x25f0 [amdgpu]
[  272.906404] Modules linked in: nct6775 hwmon_vid ccm binfmt_misc overlay
exportfs kvm_amd kvm crc32c_intel crc32_pclmul snd_hda_codec_realtek
snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel
snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore
snd_intel_dspcfg amdgpu drm_kms_helper cec fb_sys_fops syscopyarea sysfillrect
sysimgblt gpu_sched drm_ttm_helper ttm drm ccp rng_core hid_multitouch btusb
iwlmvm btrtl btintel btbcm bluetooth ecdh_generic ecc mac80211 libarc4 iwlwifi
cfg80211 igb i2c_algo_bit k10temp gpio_amdpt gpio_generic efi_pstore sdcardfs
[  272.906461] CPU: 0 PID: 15 Comm: kworker/0:1 Tainted: G        W        
5.11.0-rc5-android-x86_64+ #1
[  272.906466] Hardware name: To Be Filled By O.E.M. To Be Filled By
O.E.M./B450 Gaming-ITX/ac, BIOS P4.10 07/08/2020
[  272.906468] Workqueue: events dm_irq_work_func [amdgpu]
[  272.906826] RIP: 0010:amdgpu_dm_atomic_commit_tail+0x2582/0x25f0 [amdgpu]
[  272.907181] Code: a0 fd ff ff 01 c7 85 9c fd ff ff 37 00 00 00 c7 85 a4 fd
ff ff 20 00 00 00 e8 5a 30 13 00 e9 a0 fa ff ff 0f 0b e9 f0 f8 ff ff <0f> 0b e9
3f f9 ff ff 0f 0b 0f 0b e9 55 f9 ff ff 49 8b 06 41 0f b6
[  272.907185] RSP: 0018:ffffa0a8000a3ab8 EFLAGS: 00210002
[  272.907189] RAX: 0000000000000002 RBX: 0000000000000003 RCX:
ffff996d91211918
[  272.907191] RDX: 0000000000000001 RSI: 0000000000200297 RDI:
ffff996d510a0178
[  272.907194] RBP: ffffa0a8000a3db8 R08: 0000000000000005 R09:
0000000000000000
[  272.907196] R10: ffffa0a8000a3a18 R11: ffffa0a8000a3a1c R12:
0000000000200287
[  272.907198] R13: ffff996d6c35d800 R14: ffff996d91211800 R15:
ffff996d6f4d3600
[  272.907200] FS:  0000000000000000(0000) GS:ffff996e56e00000(0000)
knlGS:0000000000000000
[  272.907203] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  272.907206] CR2: 00000000144c2000 CR3: 000000010e262000 CR4:
00000000001506f0
[  272.907209] Call Trace:
[  272.907219]  commit_tail+0x94/0x130 [drm_kms_helper]
[  272.907251]  drm_atomic_helper_commit+0x113/0x140 [drm_kms_helper]
[  272.907280]  dm_restore_drm_connector_state+0xef/0x170 [amdgpu]
[  272.907635]  handle_hpd_irq+0x118/0x150 [amdgpu]
[  272.907990]  dm_irq_work_func+0x49/0x60 [amdgpu]
[  272.908346]  process_one_work+0x1c1/0x3c0
[  272.908353]  worker_thread+0x4d/0x3d0
[  272.908357]  ? rescuer_thread+0x3b0/0x3b0
[  272.908362]  kthread+0x133/0x150
[  272.908367]  ? kthread_create_worker_on_cpu+0x70/0x70
[  272.908373]  ret_from_fork+0x22/0x30
[  272.908379] ---[ end trace 9e7a0ad9c8574ed6 ]---
[  272.908402] ------------[ cut here ]------------
[  272.908403] WARNING: CPU: 0 PID: 15 at
amdgpu_dm_atomic_commit_tail+0x258b/0x25f0 [amdgpu]
[  272.908757] Modules linked in: nct6775 hwmon_vid ccm binfmt_misc overlay
exportfs kvm_amd kvm crc32c_intel crc32_pclmul snd_hda_codec_realtek
snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel
snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore
snd_intel_dspcfg amdgpu drm_kms_helper cec fb_sys_fops syscopyarea sysfillrect
sysimgblt gpu_sched drm_ttm_helper ttm drm ccp rng_core hid_multitouch btusb
iwlmvm btrtl btintel btbcm bluetooth ecdh_generic ecc mac80211 libarc4 iwlwifi
cfg80211 igb i2c_algo_bit k10temp gpio_amdpt gpio_generic efi_pstore sdcardfs
[  272.908803] CPU: 0 PID: 15 Comm: kworker/0:1 Tainted: G        W        
5.11.0-rc5-android-x86_64+ #1
[  272.908807] Hardware name: To Be Filled By O.E.M. To Be Filled By
O.E.M./B450 Gaming-ITX/ac, BIOS P4.10 07/08/2020
[  272.908809] Workqueue: events dm_irq_work_func [amdgpu]
[  272.909163] RIP: 0010:amdgpu_dm_atomic_commit_tail+0x258b/0x25f0 [amdgpu]
[  272.909517] Code: ff ff 37 00 00 00 c7 85 a4 fd ff ff 20 00 00 00 e8 5a 30
13 00 e9 a0 fa ff ff 0f 0b e9 f0 f8 ff ff 0f 0b e9 3f f9 ff ff 0f 0b <0f> 0b e9
55 f9 ff ff 49 8b 06 41 0f b6 8e 2d 01 00 00 48 c7 c6 38
[  272.909521] RSP: 0018:ffffa0a8000a3ab8 EFLAGS: 00210086
[  272.909524] RAX: 0000000000000001 RBX: 0000000000000003 RCX:
ffff996d91211918
[  272.909526] RDX: 0000000000000001 RSI: 0000000000200297 RDI:
ffff996d510a0178
[  272.909528] RBP: ffffa0a8000a3db8 R08: 0000000000000005 R09:
0000000000000000
[  272.909530] R10: ffffa0a8000a3a18 R11: ffffa0a8000a3a1c R12:
0000000000200287
[  272.909532] R13: ffff996d6c35d800 R14: ffff996d91211800 R15:
ffff996d6f4d3600
[  272.909534] FS:  0000000000000000(0000) GS:ffff996e56e00000(0000)
knlGS:0000000000000000
[  272.909537] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  272.909539] CR2: 00000000144c2000 CR3: 000000010e262000 CR4:
00000000001506f0
[  272.909541] Call Trace:
[  272.909549]  commit_tail+0x94/0x130 [drm_kms_helper]
[  272.909579]  drm_atomic_helper_commit+0x113/0x140 [drm_kms_helper]
[  272.909608]  dm_restore_drm_connector_state+0xef/0x170 [amdgpu]
[  272.909961]  handle_hpd_irq+0x118/0x150 [amdgpu]
[  272.910315]  dm_irq_work_func+0x49/0x60 [amdgpu]
[  272.910669]  process_one_work+0x1c1/0x3c0
[  272.910674]  worker_thread+0x4d/0x3d0
[  272.910678]  ? rescuer_thread+0x3b0/0x3b0
[  272.910682]  kthread+0x133/0x150
[  272.910687]  ? kthread_create_worker_on_cpu+0x70/0x70
[  272.910692]  ret_from_fork+0x22/0x30
[  272.910697] ---[ end trace 9e7a0ad9c8574ed7 ]---

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #4 from youling257@gmail.com ---
Created attachment 295189
  --> https://bugzilla.kernel.org/attachment.cgi?id=295189&action=edit
dmesg.txt

echo 6 > /sys/module/drm/parameters/debug
replug hdmi dmesg.

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #5 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) ---
It would be good to know what OS/Userspace this is, I don't think I've seen
anything that has atomic check failures on nearly every flip, eg:

[  179.142898] [drm:amdgpu_dm_atomic_check [amdgpu]] Atomic check failed with
err: -22

Black screen comes from the page-flip timeout, but it's hard to say what the
root cause is.

When the screen is black can you cat the DTN log and then attach the result to
this ticket?

cat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log

Thanks!

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #6 from youling257@gmail.com ---
Created attachment 295193
  --> https://bugzilla.kernel.org/attachment.cgi?id=295193&action=edit
amdgpu_dm_dtn_log

I using amd 3400g running on androidx86 7 with mesa21.0

cat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #7 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) ---
That makes more sense then, that's the behavior I'd expect on CrOS/Android.

Also explains why we haven't seen this on X/Wayland based compositors like
GNOME on Ubuntu.

One more log I'd like captured here, the trace log. Please record a log from
before the black screen occurs until after.

I've included a snippet below that shows how to capture this log:

#!/bin/bash

set +x
OUTPUT_DIR=$(pwd)

mount -o remount,rw /
echo 4 > /sys/module/drm/parameters/debug
echo 65536 > /sys/kernel/debug/tracing/buffer_size_kb

cd /sys/kernel/debug/tracing/
echo amdgpu_dm* > set_ftrace_filter
echo function > current_tracer
echo 1 > events/amdgpu_dm/enable
echo 1 > tracing_on
echo > trace
echo "Capturing a trace...\n"
read -n 1
cat trace > $OUTPUT_DIR/trace.txt
echo "Saved trace to ${OUTPUT_DIR}/trace.txt"
dmesg > $OUTPUT_DIR/dmesg.txt
echo "Saved dmesg to ${OUTPUT_DIR}/dmesg.txt"

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #8 from youling257@gmail.com ---
(In reply to Nicholas Kazlauskas from comment #7)
> That makes more sense then, that's the behavior I'd expect on CrOS/Android.
> 
> Also explains why we haven't seen this on X/Wayland based compositors like
> GNOME on Ubuntu.
> 
> One more log I'd like captured here, the trace log. Please record a log from
> before the black screen occurs until after.
> 
> I've included a snippet below that shows how to capture this log:
> 
> #!/bin/bash
> 
> set +x
> OUTPUT_DIR=$(pwd)
> 
> mount -o remount,rw /
> echo 4 > /sys/module/drm/parameters/debug
> echo 65536 > /sys/kernel/debug/tracing/buffer_size_kb
> 
> cd /sys/kernel/debug/tracing/
> echo amdgpu_dm* > set_ftrace_filter
> echo function > current_tracer
> echo 1 > events/amdgpu_dm/enable
> echo 1 > tracing_on
> echo > trace
> echo "Capturing a trace...\n"
> read -n 1
> cat trace > $OUTPUT_DIR/trace.txt
> echo "Saved trace to ${OUTPUT_DIR}/trace.txt"
> dmesg > $OUTPUT_DIR/dmesg.txt
> echo "Saved dmesg to ${OUTPUT_DIR}/dmesg.txt"

run the script,only echo Capturing a trace...\n
failed output trace.txt and dmesg.txt.

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #9 from youling257@gmail.com ---
Created attachment 295197
  --> https://bugzilla.kernel.org/attachment.cgi?id=295197&action=edit
dmesg.txt

I delete "read -n 1", can output dmesg.txt and trace.txt.
trace.txt,
# tracer: function
#
# entries-in-buffer/entries-written: 0/0   #P:8
#
#                                _-----=> irqs-off
#                               / _----=> need-resched
#                              | / _---=> hardirq/softirq
#                              || / _--=> preempt-depth
#                              ||| /     delay
#           TASK-PID     CPU#  ||||   TIMESTAMP  FUNCTION
#              | |         |   ||||      |         |

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #10 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) ---
I don't expect the trace log to be completely empty.

You'll need to leave the trace log running after enabling it as well (with
tracing on/trace).

You'll also need various config options set in your kernel:

CONFIG_FUNCTION_TRACER
CONFIG_FUNCTION_GRAPH_TRACER
CONFIG_STACK_TRACER
CONFIG_DYNAMIC_FTRACE

Sorry if this is a little bit involved, but I'd like capture the exact sequence
of atomic commits with the trace so I can reproduce the sequence on my end.

Thanks!

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #11 from youling257@gmail.com ---
Created attachment 295201
  --> https://bugzilla.kernel.org/attachment.cgi?id=295201&action=edit
trace.txt

cat /sys/kernel/debug/tracing/trace

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #12 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) ---
Thanks, this was what I'm looking for.

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #13 from Alex Deucher (alexdeucher@gmail.com) ---
See also:
https://gitlab.freedesktop.org/drm/amd/-/issues/1487

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

Eric Samuelson (eric@samuelson.no) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |eric@samuelson.no

--- Comment #14 from Eric Samuelson (eric@samuelson.no) ---
*** Bug 211821 has been marked as a duplicate of this bug. ***

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #15 from Alex Deucher (alexdeucher@gmail.com) ---
Reverted:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=efc8278eecfd5e6fa36c5d41e71d038f534fe107

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

Paul Menzel (pmenzel+bugzilla.kernel.org@molgen.mpg.de) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pmenzel+bugzilla.kernel.org
                   |                            |@molgen.mpg.de

--- Comment #16 from Paul Menzel (pmenzel+bugzilla.kernel.org@molgen.mpg.de) ---
Can this bug be closed then?

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #17 from Alex Deucher (alexdeucher@gmail.com) ---
(In reply to Paul Menzel from comment #16)
> Can this bug be closed then?

Only the person that opens the bug can close it, but yes, it can be closed.

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

youling257@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |CODE_FIX

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[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=211649

Stefan de Konink (stefan@konink.de) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |stefan@konink.de

--- Comment #18 from Stefan de Konink (stefan@konink.de) ---
*** Bug 211997 has been marked as a duplicate of this bug. ***

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