[Bug 107947] REG_WAIT timeout 10us * 3500 tries - dce_mi_free_dmif line:563 during boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107947

--- Comment #7 from Alex Smith <asmith at feralinteractive.com> ---
This is occurring for me on a Vega 64. When it occurs the machine boots to a
black screen. It has started happening since upgrading to Fedora 27's 4.18.16,
previously I was on 4.18.7 (does not happen there). I've since updated to
Fedora 29, 4.18.16-300.fc29.x86_64, and it still happens there.

[drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us * 3500 tries -
dce_mi_free_dmif line:636
WARNING: CPU: 6 PID: 122 at
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:254
generic_reg_wait+0xe8/0x160 [amdgpu]
Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat
nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack
libcrc32c tun bridge stp llc ebtable_filter ebtables >
 ttm alx drm crc32c_intel mdio video
CPU: 6 PID: 122 Comm: kworker/6:1 Not tainted 4.18.16-100.fc27.x86_64 #1
Hardware name: Gigabyte Technology Co., Ltd. Z170X-Gaming 3/Z170X-Gaming 3,
BIOS F7 06/03/2016
Workqueue: events drm_mode_rmfb_work_fn [drm]
RIP: 0010:generic_reg_wait+0xe8/0x160 [amdgpu]
Code: 58 48 8b 4c 24 50 89 ee 8b 54 24 48 48 c7 c7 e0 93 75 c0 44 89 4c 24 08
e8 b5 4f c1 ff 41 83 7c 24 20 01 44 8b 4c 24 08 74 02 <0f> 0b 48 83 c4 10 44 89
c8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f af 
RSP: 0018:ffffb846441e7a78 EFLAGS: 00010297
RAX: 0000000000000000 RBX: 0000000000000dad RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff9365c1d96938 RDI: ffff9365c1d96938
RBP: 000000000000000a R08: 0000000000000473 R09: 0000000000000002
R10: 000000000000beee R11: ffffffff889a21ed R12: ffff93659551d900
R13: 00000000000035af R14: 0000000000000010 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff9365c1d80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000250e080 CR3: 00000005e720a005 CR4: 00000000003606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 dce_mi_free_dmif+0xf7/0x180 [amdgpu]
 dce110_reset_hw_ctx_wrap+0x13f/0x1e0 [amdgpu]
 dce110_apply_ctx_to_hw+0x58/0x9e0 [amdgpu]
 ? _cond_resched+0x15/0x40
 ? pp_dpm_dispatch_tasks+0x41/0x60 [amdgpu]
 ? amdgpu_pm_compute_clocks.part.9+0xb7/0x590 [amdgpu]
 dc_commit_state+0x30a/0x590 [amdgpu]
 amdgpu_dm_atomic_commit_tail+0x385/0xd70 [amdgpu]
 ? _cond_resched+0x15/0x40
 ? wait_for_completion_timeout+0x3a/0x190
 ? wait_for_completion_interruptible+0x35/0x1c0
 commit_tail+0x3d/0x70 [drm_kms_helper]
 drm_atomic_helper_commit+0xfc/0x110 [drm_kms_helper]
 drm_framebuffer_remove+0x30d/0x400 [drm]
 drm_mode_rmfb_work_fn+0x4f/0x60 [drm]
 process_one_work+0x18f/0x370
 worker_thread+0x30/0x380
 ? process_one_work+0x370/0x370
 kthread+0x113/0x130
 ? kthread_create_worker_on_cpu+0x70/0x70
 ret_from_fork+0x35/0x40
---[ end trace 9529270edb28c719 ]---

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