https://bugzilla.kernel.org/show_bug.cgi?id=206247
--- Comment #1 from udo (udovdh@xs4all.nl) --- Some context:
[ 33.608142] Console: switching to colour dummy device 80x25 [ 33.641766] [drm] initializing kernel modesetting (RAVEN 0x1002:0x15D8 0x1002:0x15D8 0xC8). [ 33.691838] [drm] register mmio base: 0xFCD00000 [ 33.691842] [drm] register mmio size: 524288 [ 33.691868] [drm] add ip block number 0 <soc15_common> [ 33.775887] [drm] add ip block number 1 <gmc_v9_0> [ 33.775887] [drm] add ip block number 2 <vega10_ih> [ 33.775888] [drm] add ip block number 3 <psp> [ 33.775888] [drm] add ip block number 4 <gfx_v9_0> [ 33.775889] [drm] add ip block number 5 <sdma_v4_0> [ 33.775889] [drm] add ip block number 6 <powerplay> [ 33.775890] [drm] add ip block number 7 <dm> [ 33.775890] [drm] add ip block number 8 <vcn_v1_0> [ 33.815135] [drm] BIOS signature incorrect 5b 7 [ 34.028500] ATOM BIOS: 113-PICASSO-115 [ 34.028523] [drm] VCN decode is enabled in VM mode [ 34.028524] [drm] VCN encode is enabled in VM mode [ 34.028524] [drm] VCN jpeg decode is enabled in VM mode [ 34.028557] [drm] vm size is 262144 GB, 4 levels, block size is 9-bit, fragment size is 9-bit [ 34.028564] amdgpu 0000:0a:00.0: VRAM: 2048M 0x000000F400000000 - 0x000000F47FFFFFFF (2048M used) [ 34.028565] amdgpu 0000:0a:00.0: GART: 1024M 0x0000000000000000 - 0x000000003FFFFFFF [ 34.028566] amdgpu 0000:0a:00.0: AGP: 267419648M 0x000000F800000000 - 0x0000FFFFFFFFFFFF [ 34.028569] [drm] Detected VRAM RAM=2048M, BAR=2048M [ 34.028569] [drm] RAM width 128bits DDR4 [ 34.028915] [TTM] Zone kernel: Available graphics memory: 7190102 KiB [ 34.291895] md: md127: resync done. [ 34.339191] [TTM] Zone dma32: Available graphics memory: 2097152 KiB [ 34.491530] [TTM] Initializing pool allocator [ 34.491538] [TTM] Initializing DMA pool allocator [ 34.491594] [drm] amdgpu: 2048M of VRAM memory ready [ 34.575594] [drm] amdgpu: 8192M of GTT memory ready. [ 34.575608] [drm] GART: num cpu pages 262144, num gpu pages 262144 [ 34.643124] [drm] PCIE GART of 1024M enabled (table at 0x000000F400900000). [ 34.686767] [drm] use_doorbell being set to: [true] [ 34.716100] amdgpu: [powerplay] hwmgr_sw_init smu backed is smu10_smu [ 34.754769] [drm] Found VCN firmware Version: 1.73 Family ID: 18 [ 34.790801] [drm] PSP loading VCN firmware [ 34.836051] [drm] reserve 0x400000 from 0xf47f800000 for PSP TMR [ 35.108064] [drm] DM_PPLIB: values for F clock [ 35.134706] [drm] DM_PPLIB: 0 in kHz, 3099 in mV [ 35.162883] [drm] DM_PPLIB: 0 in kHz, 3099 in mV [ 35.191055] [drm] DM_PPLIB: 0 in kHz, 3099 in mV [ 35.219246] [drm] DM_PPLIB: 1600000 in kHz, 4399 in mV [ 35.250541] ------------[ cut here ]------------ [ 35.278240] WARNING: CPU: 1 PID: 561 at drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:1464 dcn_bw_update_from_pplib+0xa5/0x2e0 [amdgpu]