This bug is still present in the linux.git kernel as of now.

kernel 4.19.0-rc6-ChaeKyung-April-00336-gc1d84a1b42ef'
chip 2400G
board ROG STRIX X470-F GAMING, BIOS 4011 04/19/2018

on boot,
[    7.913285] amdgpu: [powerplay] dpm has been enabled
[    7.913430] [drm] DM_PPLIB: values for Invalid clock
[    7.913514] [drm] DM_PPLIB:   0 in kHz
[    7.913592] [drm] DM_PPLIB:   0 in kHz
[    7.913669] [drm] DM_PPLIB:   0 in kHz
[    7.913747] [drm] DM_PPLIB:   1400000 in kHz
[    7.913905] WARNING: CPU: 6 PID: 483 at
drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:1372
dcn_bw_update_from_pplib+0x
16b/0x280 [amdgpu]
[    7.914052] Modules linked in: amdgpu(+) chash gpu_sched drm_kms_helper
syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm raid1
 igb crct10dif_pclmul crc32_pclmul crc32c_intel r8169 ghash_clmulni_intel
libphy serio_raw dca i2c_algo_bit it87(OE) hwmon_vid k10temp
[    7.914287] CPU: 6 PID: 483 Comm: systemd-udevd Tainted: G           OE    
4.19.0-rc6-ChaeKyung-April-00336-gc1d84a1b42ef #34
[    7.914419] Hardware name: System manufacturer System Product Name/ROG STRIX
X470-F GAMING, BIOS 4011 04/19/2018
[    7.914602] RIP: 0010:dcn_bw_update_from_pplib+0x16b/0x280 [amdgpu]
[    7.914698] Code: d8 ca d8 f1 d9 5a 50 8b 44 fc 14 49 8b 94 24 78 01 00 00
48 89 04 24 df 2c 24 d8 f1 db 42 78 de c9 de ca de f9 d9 5a 4c eb 02 <0f> 0b 48
89 da be 04 00 00 00 48 89 ef e8 73 55 fe ff 84 c0 0f 84
[    7.914883] RSP: 0018:ffffada04206b788 EFLAGS: 00010246
[    7.914969] RAX: 0000000000000001 RBX: ffffada04206b7e8 RCX:
0000000000000000
[    7.915065] RDX: 0000000000000000 RSI: 0000000000000004 RDI:
ffff98c390395540
[    7.915160] RBP: ffff98c38069be80 R08: 0000000000000000 R09:
ffff98bf800b9f40
[    7.915256] R10: ffffffff934c1f80 R11: ffffffff9491f00d R12:
ffff98c3813dd000
[    7.915351] R13: ffff98c3853214c0 R14: ffff98c3813dd000 R15:
0000000000000000
[    7.915447] FS:  00007f895d8f3180(0000) GS:ffff98c390380000(0000)
knlGS:0000000000000000
[    7.915562] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    7.915650] CR2: 00007f5aacdab120 CR3: 0000000405b94000 CR4:
00000000003406e0
[    7.915745] Call Trace:
[    7.915823]  ? _cond_resched+0x15/0x30
[    7.915959]  dcn10_create_resource_pool+0x781/0x9d0 [amdgpu]
[    7.916110]  ? dal_aux_engine_dce110_create+0x39/0x80 [amdgpu]
[    7.916258]  dc_create_resource_pool+0x42/0x190 [amdgpu]
[    7.916350]  ? _cond_resched+0x15/0x30
[    7.916430]  ? __kmalloc+0x17e/0x220
[    7.916563]  ? dal_gpio_service_create+0x8f/0x110 [amdgpu]
[    7.916709]  dc_create+0x20f/0x630 [amdgpu]
[    7.916796]  ? vgacon_putc+0x10/0x10
[    7.916930]  dm_hw_init+0xc8/0x130 [amdgpu]
[    7.917069]  amdgpu_device_init.cold.28+0x10ea/0x1295 [amdgpu]
[    7.917210]  amdgpu_driver_load_kms+0x86/0x2c0 [amdgpu]
[    7.917311]  drm_dev_register+0x109/0x140 [drm]
[    7.917440]  amdgpu_pci_probe+0x13c/0x1c0 [amdgpu]
[    7.917530]  local_pci_probe+0x41/0x90
[    7.917610]  pci_device_probe+0x188/0x1a0
[    7.917691]  really_probe+0x235/0x3a0
[    7.917770]  driver_probe_device+0xb3/0xf0
[    7.917851]  __driver_attach+0xdd/0x110
[    7.917930]  ? driver_probe_device+0xf0/0xf0
[    7.918011]  bus_for_each_dev+0x76/0xc0
[    7.918092]  ? klist_add_tail+0x3b/0x60
[    7.918171]  bus_add_driver+0x152/0x230
[    7.918250]  ? 0xffffffffc07e4000
[    7.918326]  driver_register+0x6b/0xb0
[    7.918405]  ? 0xffffffffc07e4000
[    7.918482]  do_one_initcall+0x46/0x1b8
[    7.918562]  ? _cond_resched+0x15/0x30
[    7.918640]  ? kmem_cache_alloc_trace+0x15f/0x1e0
[    7.918725]  do_init_module+0x5a/0x210
[    7.918804]  load_module+0x203c/0x2280
[    7.918885]  ? __do_sys_init_module+0x13b/0x180
[    7.918967]  __do_sys_init_module+0x13b/0x180
[    7.919050]  do_syscall_64+0x55/0x150
[    7.919129]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[    7.919214] RIP: 0033:0x7f895c50786a
[    7.919292] Code: 48 8b 0d 39 e6 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e
0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 af 00 00 00 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 8b 0d 06 e6 2b 00 f7 d8 64 89 01 48
[    7.919476] RSP: 002b:00007ffca7439ce8 EFLAGS: 00000246 ORIG_RAX:
00000000000000af
[    7.919587] RAX: ffffffffffffffda RBX: 0000562804b0a9c0 RCX:
00007f895c50786a
[    7.919682] RDX: 00007f895d06e4cd RSI: 000000000858f176 RDI:
00007f894c87f010
[    7.919777] RBP: 00007f895d06e4cd R08: 0000000000000002 R09:
0000000000000001
[    7.919871] R10: 0000562804ae2010 R11: 0000000000000246 R12:
00007f894c87f010
[    7.919966] R13: 0000562804afb2f0 R14: 0000000000020000 R15:
0000000000000000
[    7.920061] ---[ end trace 3de9567f671e90b4 ]---
[    7.920148] [drm] DM_PPLIB: values for Invalid clock
[    7.920232] [drm] DM_PPLIB:   300000 in kHz
[    7.920313] [drm] DM_PPLIB:   600000 in kHz
[    7.920391] [drm] DM_PPLIB:   626000 in kHz
[    7.920470] [drm] DM_PPLIB:   654000 in kHz
[    7.929270] [drm] Display Core initialized with v3.1.59!