Bug 212361

I'm getting the following on a AMD Ryzen 5 PRO 4650G with Radeon Graphics

[   10.537847] amdgpu 0000:30:00.0: amdgpu: RAS: optional ras ta ucode is not available
[   10.545573] amdgpu 0000:30:00.0: amdgpu: RAP: optional rap ta ucode is not available
[   10.545575] amdgpu 0000:30:00.0: amdgpu: SECUREDISPLAY: securedisplay ta ucode is not available
[   10.545794] amdgpu 0000:30:00.0: amdgpu: SMU is initialized successfully!
[   10.547115] [drm] kiq ring mec 2 pipe 1 q 0
[   10.547613] ------------[ cut here ]------------
[   10.547613] WARNING: CPU: 0 PID: 411 at drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn21/rn_clk_mgr.c:833 rn_clk_mgr_construct+0x2dd/0x440 [amdgpu]
[   10.547778] Modules linked in: iptable_mangle(+) iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bpfilter ccm algif_aead des_generic libdes ecb algif_skcipher cmac md4 algif_hash af_alg amdgpu(+) iwlmvm btrfs mac80211 raid1 dm_raid raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx md_mod blake2b_generic xor libarc4 iwlwifi drm_ttm_helper ttm gpu_sched i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt intel_rapl_msr intel_rapl_common fb_sys_fops cec kvm_amd cfg80211 kvm snd_hda_codec_realtek dm_thin_pool snd_hda_codec_generic snd_hda_codec_hdmi dm_persistent_data ledtrig_audio snd_hda_intel dm_bio_prison snd_intel_dspcfg dm_bufio snd_hda_codec libcrc32c raid6_pq r8169 bridge snd_hwdep snd_hda_core wmi_bmof realtek mdio_devres snd_pcm hid_logitech_hidpp of_mdio fixed_phy libphy snd_timer drm irqbypass mousedev snd joydev rapl sp5100_tco rfkill k10temp pcspkr i2c_piix4 soundcore wmi pinctrl_amd tpm_tis stp gpio_amdpt tpm_tis_core
[   10.547820]  acpi_cpufreq llc mac_hid fuse pkcs8_key_parser crypto_user agpgart ip_tables x_tables ext4 crc32c_generic crc16 mbcache jbd2 dm_crypt cbc hid_logitech_dj encrypted_keys trusted hid_generic usbhid uas usb_storage dm_mod crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel xhci_pci ccp xhci_pci_renesas crypto_simd cryptd xhci_hcd tpm_crb tpm rng_core hid_lenovo hid vfat fat
[   10.547840] CPU: 0 PID: 411 Comm: systemd-udevd Not tainted 5.12.0-rc3-00070-g8b12a62a4e3e #22
[   10.547842] Hardware name: Micro-Star International Co., Ltd. MS-7C94/MAG B550M MORTAR WIFI (MS-7C94), BIOS 1.20 08/03/2020
[   10.547843] RIP: 0010:rn_clk_mgr_construct+0x2dd/0x440 [amdgpu]
[   10.547992] Code: ff ff b8 03 00 00 00 41 8b 8c c5 80 00 00 00 41 89 c1 89 c7 85 c9 74 0c 41 8b 94 c5 84 00 00 00 85 d2 75 75 48 83 e8 01 73 dd <0f> 0b e9 31 fe ff ff 48 c7 c6 00 5f 56 c1 b9 14 00 00 00 48 89 c7
[   10.547993] RSP: 0018:ffffa0c281663650 EFLAGS: 00010297
[   10.547995] RAX: ffffffffffffffff RBX: ffff91210c244840 RCX: 0000000000000640
[   10.547996] RDX: 0000000000000000 RSI: ffffa0c281663678 RDI: 0000000000000000
[   10.547997] RBP: ffff91210a12ca00 R08: 0000000000000000 R09: 0000000000000000
[   10.547997] R10: 7fc9117fffffffff R11: ffff91210c250800 R12: ffff912109495540
[   10.547998] R13: ffffa0c281663678 R14: ffff912104150000 R15: 00000000fffffff0
[   10.547999] FS:  00007ff7a5594a40(0000) GS:ffff9127ef200000(0000) knlGS:0000000000000000
[   10.548000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.548001] CR2: 000000c000b87c80 CR3: 00000001023ce000 CR4: 0000000000350ef0
[   10.548002] Call Trace:
[   10.548006]  dc_clk_mgr_create+0x178/0x260 [amdgpu]
[   10.548154]  dc_create+0x256/0x7c0 [amdgpu]
[   10.548342]  ? amdgpu_cgs_create_device+0x23/0x50 [amdgpu]
[   10.548543]  ? kmem_cache_alloc_trace+0x169/0x2d0
[   10.548547]  amdgpu_dm_init.isra.0+0x1bd/0x250 [amdgpu]
[   10.548766]  ? wake_up_klogd.part.0+0x4f/0x70
[   10.548769]  ? vprintk_emit+0xf4/0x1a0
[   10.548774]  dm_hw_init+0xe/0x20 [amdgpu]
[   10.549001]  amdgpu_device_init.cold+0x1758/0x1b21 [amdgpu]
[   10.549214]  amdgpu_driver_load_kms+0x64/0x260 [amdgpu]
[   10.549330]  amdgpu_pci_probe+0x11f/0x1b0 [amdgpu]
[   10.549442]  local_pci_probe+0x42/0x80
[   10.549445]  ? pci_match_device+0xd7/0x100
[   10.549447]  pci_device_probe+0xfa/0x1b0
[   10.549449]  really_probe+0xf2/0x440
[   10.549453]  driver_probe_device+0xe1/0x150
[   10.549455]  device_driver_attach+0xa1/0xb0
[   10.549456]  __driver_attach+0x8a/0x150
[   10.549458]  ? device_driver_attach+0xb0/0xb0
[   10.549459]  ? device_driver_attach+0xb0/0xb0
[   10.549460]  bus_for_each_dev+0x89/0xd0
[   10.549462]  bus_add_driver+0x12b/0x1e0
[   10.549464]  driver_register+0x8b/0xe0
[   10.549465]  ? 0xffffffffc183b000
[   10.549466]  do_one_initcall+0x57/0x210
[   10.549469]  do_init_module+0x5c/0x260
[   10.549471]  load_module+0x22e6/0x24b0
[   10.549475]  __do_sys_init_module+0x13b/0x1c0
[   10.549477]  do_syscall_64+0x33/0x40
[   10.549480]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[   10.549482] RIP: 0033:0x7ff7a5e87d9e
[   10.549484] Code: 48 8b 0d d5 10 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 af 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a2 10 0c 00 f7 d8 64 89 01 48
[   10.549485] RSP: 002b:00007ffc1c8aeba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000af
[   10.549487] RAX: ffffffffffffffda RBX: 000056342020ca00 RCX: 00007ff7a5e87d9e
[   10.549488] RDX: 00007ff7a5fda9bd RSI: 000000000ddf3949 RDI: 00007ff7889fb010
[   10.549489] RBP: 00007ff7889fb010 R08: 0000563420209970 R09: 000000000ddf3960
[   10.549490] R10: 0000000563420209 R11: 0000000000000246 R12: 00007ff7a5fda9bd
[   10.549491] R13: 0000000000000001 R14: 0000563420130be0 R15: 000056342020ca00
[   10.549492] ---[ end trace 37418064a28ef735 ]---
[   10.549574] [drm] Display Core initialized with v3.2.122!
[   10.562390] [drm] DMUB hardware initialized: version=0x01000000
[   10.585303] snd_hda_intel 0000:30:00.1: bound 0000:30:00.0 (ops amdgpu_dm_audio_component_bind_ops [amdgpu])
[   10.719490] [drm] VCN decode and encode initialized successfully(under DPG Mode).
[   10.719510] [drm] JPEG decode initialized successfully.
[   10.720565] kfd kfd: Allocated 3969056 bytes on gart
[   10.720734] Virtual CRAT table created for GPU
[   10.720813] amdgpu: Topology: Add dGPU node [0x1636:0x1002]
[   10.720816] kfd kfd: added device 1002:1636
[   10.720818] amdgpu 0000:30:00.0: amdgpu: SE 1, SH per SE 2, CU per SH 18, active_cu_number 27
[   10.721785] [drm] fb mappable at 0x810CE0000
[   10.721786] [drm] vram apper at 0x810000000
[   10.721786] [drm] size 9216000
[   10.721787] [drm] fb depth is 24
[   10.721787] [drm]    pitch is 7680
[   10.721858] fbcon: amdgpudrmfb (fb0) is primary device