Comment # 13
on bug 107296
from John Pathy
I have the same problem with my 2400G. My kernel is as follows [ 0.000000] Linux version 4.19.0-5-amd64 (debian-kernel@lists.debian.org) (gcc version 8.3.0 (Debian 8.3.0-7)) #1 SMP Debian 4.19.37-3 (2019-05-15) When my system boots I get a RIP with a trace as above [ 1.532390] amdgpu: [powerplay] dpm has been enabled [ 1.532453] [drm] DM_PPLIB: values for Invalid clock [ 1.532454] [drm] DM_PPLIB: 0 in kHz [ 1.532456] [drm] DM_PPLIB: 400000 in kHz [ 1.532457] [drm] DM_PPLIB: 933000 in kHz [ 1.532459] [drm] DM_PPLIB: 1067000 in kHz [ 1.532537] WARNING: CPU: 6 PID: 134 at drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:1372 dcn_bw_update_from_pplib+0x171/0x290 [amdgpu] [ 1.532540] Modules linked in: amdkfd amdgpu(+) crc32c_intel mxm_wmi chash gpu_sched ttm aesni_intel ahci drm_kms_helper aes_x86_64 crypto_simd libahci cryptd glue_helper xhci_pci libata drm xhci_hcd igb i2c_piix4 scsi_mod usbcore dca i2c_algo_bit usb_common video wmi gpio_amdpt gpio_generic button [ 1.532558] CPU: 6 PID: 134 Comm: systemd-udevd Not tainted 4.19.0-5-amd64 #1 Debian 4.19.37-3 [ 1.532561] Hardware name: Gigabyte Technology Co., Ltd. X470 AORUS ULTRA GAMING/X470 AORUS ULTRA GAMING-CF, BIOS F30 04/16/2019 [ 1.532620] RIP: 0010:dcn_bw_update_from_pplib+0x171/0x290 [amdgpu] So I looked into this and the problem I see is that the fclks are not initializing properly is routine res = dm_pp_get_clock_levels_by_type_with_voltage( ctx, DM_PP_CLOCK_TYPE_FCLK, &fclks); When the sanity check in res = verify_clock_values(&fclks); is completed, it detects the 0 in index [0] and initiated the RIP. This is the data that initiated the RIP. [ 1.532454] [drm] DM_PPLIB: 0 in kHz The fclks in my log appear to be shifted down. I seems it should look like this, which is what a 2200G reports on boot. This was from somebody else's system. [ 3.774892] [drm] DM_PPLIB: values for F clock [ 3.774894] [drm] DM_PPLIB: 400000 in kHz [ 3.774894] [drm] DM_PPLIB: 933000 in kHz [ 3.774895] [drm] DM_PPLIB: 1067000 in kHz [ 3.774895] [drm] DM_PPLIB: 1200000 in kHz [ 3.774896] [drm] DM_PPLIB: values for DCF clock [ 3.774896] [drm] DM_PPLIB: 300000 in kHz [ 3.774897] [drm] DM_PPLIB: 600000 in kHz [ 3.774897] [drm] DM_PPLIB: 626000 in kHz [ 3.774897] [drm] DM_PPLIB: 654000 in kHz Also to note is that for my kernel (4.19.0-5-amd64) the F and DCF are reported as invalid, but for subsequent kernels 5.1.3 and 5.2-rc1, this appears to be corrected. My whole kern.log is located in the attachment for comment 12.
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