[Bug 215618] vblank related lockup during start of SteamVR using Valve Index HMD

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https://bugzilla.kernel.org/show_bug.cgi?id=215618

Pierre Choffet (ct.lrn@xxxxxxxx) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ct.lrn@xxxxxxxx

--- Comment #1 from Pierre Choffet (ct.lrn@xxxxxxxx) ---
I can reproduce the crash with a Radeon 6800XT in 5.17.1. GPU is then unstable
after it resets and system must be rebooted.

Here is my callstack - it's almost the same as the previous one:

> [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'!
> [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'!
> [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'!
> ------------[ cut here ]------------
> amdgpu 0000:0b:00.0: drm_WARN_ON_ONCE(drm_drv_uses_atomic_modeset(dev))
> WARNING: CPU: 3 PID: 2263 at drivers/gpu/drm/drm_vblank.c:728 drm_crtc_vblank_helper_get_vblank_timestamp_internal+0x369/0x380
> Modules linked in: nf_tables nfnetlink snd_seq_dummy snd_hrtimer snd_seq cfg80211 8021q garp mrp stp llc nct6775 hwmon_vid eeepc_wmi intel_ra>
>  crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel ccp sr_mod xhci_pci crypto_simd cryptd rng_core cdrom xhci_pci_re>
> CPU: 3 PID: 2263 Comm: VulkanVblankThr Not tainted 5.17.1-arch1-1 #1 0ea933cb6bfe82a8dc16ab834a4bccdd297f98b7
> Hardware name: ASUS System Product Name/ROG CROSSHAIR VIII DARK HERO, BIOS 3601 05/26/2021
> RIP: 0010:drm_crtc_vblank_helper_get_vblank_timestamp_internal+0x369/0x380
> Code: 4c 8b 6f 50 4d 85 ed 75 03 4c 8b 2f e8 f0 6b 01 00 48 c7 c1 40 f3 d1 ad 4c 89 ea 48 c7 c7 c2 5d d1 ad 48 89 c6 e8 a3 43 3d 00 <0f> 0b e>
> RSP: 0018:ffff9beb86303b20 EFLAGS: 00010082
> RAX: 0000000000000000 RBX: ffffffffc0b7e840 RCX: 0000000000000027
> RDX: ffff8dca0eae1728 RSI: 0000000000000001 RDI: ffff8dca0eae1720
> RBP: ffff9beb86303b90 R08: 0000000000000000 R09: ffff9beb86303950
> R10: ffff9beb86303948 R11: ffff8dca2f2a9b28 R12: 0000000000000000
> R13: ffff8dc3023dae30 R14: 0000000000000000 R15: ffff8dc3376b21d8
> FS:  00007fa79444b640(0000) GS:ffff8dca0eac0000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007fa6ec001278 CR3: 00000001e6984000 CR4: 0000000000750ee0
> PKRU: 55555554
> Call Trace:
>  <TASK>
>  drm_get_last_vbltimestamp+0xb2/0xc0
>  drm_update_vblank_count+0x91/0x3d0
>  drm_vblank_enable+0x14b/0x180
>  drm_vblank_get+0x95/0xe0
>  drm_crtc_queue_sequence_ioctl+0xfd/0x2d0
>  ? __check_object_size+0x46/0x140
>  ? drm_crtc_get_sequence_ioctl+0x1a0/0x1a0
>  drm_ioctl_kernel+0xb8/0x140
>  drm_ioctl+0x22a/0x3d0
>  ? drm_crtc_get_sequence_ioctl+0x1a0/0x1a0
>  amdgpu_drm_ioctl+0x49/0x80 [amdgpu 08a70cd20fdf14582ce9165e3698aeaecdd8c8f8]
>  __x64_sys_ioctl+0x82/0xb0
>  do_syscall_64+0x5c/0x80
>  ? do_user_addr_fault+0x1d7/0x690
>  ? do_syscall_64+0x69/0x80
>  ? exc_page_fault+0x72/0x170
>  entry_SYSCALL_64_after_hwframe+0x44/0xae
> RIP: 0033:0x7fa7ac2a7e6f
> Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <41> 89 c>
> RSP: 002b:00007fa79444ab00 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> RAX: ffffffffffffffda RBX: 00007fa79444ab90 RCX: 00007fa7ac2a7e6f
> RDX: 00007fa79444ab90 RSI: 00000000c018643c RDI: 000000000000004a
> RBP: 00000000c018643c R08: 0000000000000000 R09: 00007fa6ec000be0
> R10: 000000000000006e R11: 0000000000000246 R12: 000055d760b895b8
> R13: 000000000000004a R14: 000055d760c41d00 R15: 0000000000000000
>  </TASK>
> ---[ end trace 0000000000000000 ]---
> [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'!
> [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'!
> [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'!

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