[Bug 205277] [amd powerplay] vega10: soc voltage for power state 7 is not changed by overdrive.

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=205277

--- Comment #2 from Pelle van Gils (pelle at vangils.xyz) ---
(In reply to Pelle van Gils from comment #1)
> Created attachment 285585 [details]
> proposed patch
> 
> added proposed fix

with this patch applied (and the debug patch) dmesg output is:
...
[  107.149105] amdgpu: [powerplay] vega10 SCLK vddc_lookup_table state: 0 vddc:
800
[  107.149107] amdgpu: [powerplay] vega10 SCLK vddc_lookup_table state: 1 vddc:
900
[  107.149108] amdgpu: [powerplay] vega10 SCLK vddc_lookup_table state: 2 vddc:
910
[  107.149109] amdgpu: [powerplay] vega10 SCLK vddc_lookup_table state: 3 vddc:
920
[  107.149109] amdgpu: [powerplay] vega10 SCLK vddc_lookup_table state: 4 vddc:
930
[  107.149110] amdgpu: [powerplay] vega10 SCLK vddc_lookup_table state: 5 vddc:
940
[  107.149111] amdgpu: [powerplay] vega10 SCLK vddc_lookup_table state: 6 vddc:
950
[  107.149112] amdgpu: [powerplay] vega10 SCLK vddc_lookup_table state: 7 vddc:
980
...


And the soc voltage under stress stays at the set value:

# cat /sys/kernel/debug/dri/0/amdgpu_pm_info
...
GFX Clocks and Power:
        800 MHz (MCLK)
        1541 MHz (SCLK)
        1269 MHz (PSTATE_SCLK)
        700 MHz (PSTATE_MCLK)
        981 mV (VDDGFX)
        161.0 W (average GPU)
...

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