[Bug 106177] overclocking doesn't work with 4.17-rc1

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=106177

--- Comment #6 from Christoph Haag <haagch@frickel.club> ---
I have not tried amdgpu.ppfeaturemask=0xffffffff etc. yet.
If a behavior change like that is intended, there should be some easily
accessible documentation about it somewhere.

1288 MHz (SCLK) is the factory overclocked default max clock, so debugfs agrees
that pp_sclk_od on its own does nothing with 4.17rc4.

root@c-pc ~ # echo high >
/sys/class/drm/card0/device/power_dpm_force_performance_level
root@c-pc ~ # echo 5 > /sys/class/drm/card0/device/pp_sclk_od
root@c-pc ~ # cat /sys/kernel/debug/dri/0/amdgpu_pm_info
Clock Gating Flags Mask: 0x37bcf
        Graphics Medium Grain Clock Gating: On
        Graphics Medium Grain memory Light Sleep: On
        Graphics Coarse Grain Clock Gating: On
        Graphics Coarse Grain memory Light Sleep: On
        Graphics Coarse Grain Tree Shader Clock Gating: Off
        Graphics Coarse Grain Tree Shader Light Sleep: Off
        Graphics Command Processor Light Sleep: On
        Graphics Run List Controller Light Sleep: On
        Graphics 3D Coarse Grain Clock Gating: Off
        Graphics 3D Coarse Grain memory Light Sleep: Off
        Memory Controller Light Sleep: On
        Memory Controller Medium Grain Clock Gating: On
        System Direct Memory Access Light Sleep: Off
        System Direct Memory Access Medium Grain Clock Gating: On
        Bus Interface Medium Grain Clock Gating: Off
        Bus Interface Light Sleep: On
        Unified Video Decoder Medium Grain Clock Gating: On
        Video Compression Engine Medium Grain Clock Gating: On
        Host Data Path Light Sleep: Off
        Host Data Path Medium Grain Clock Gating: On
        Digital Right Management Medium Grain Clock Gating: Off
        Digital Right Management Light Sleep: Off
        Rom Medium Grain Clock Gating: On
        Data Fabric Medium Grain Clock Gating: Off

GFX Clocks and Power:
        2000 MHz (MCLK)
        1288 MHz (SCLK)
        300 MHz (PSTATE_SCLK)
        601 MHz (PSTATE_MCLK)
        1093 mV (VDDGFX)
        19.166 W (VDDC)
        15.19 W (VDDCI)
        40.200 W (max GPU)
        40.185 W (average GPU)

GPU Temperature: 43 C
GPU Load: 0 %

UVD: Disabled

VCE: Disabled

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