[Bug 215938] amd-pstate ignoring scaling_max_freq after waking from suspend

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215938

--- Comment #20 from a@annel.in ---
Guys, have you get amd_pstate working with schedutil governor?  
On my system, it completely ignores frequency limits and boost state. 

```
~  sudo cpupower frequency-set -g schedutil -d 1200MHz -u 1600MHz               
~  sudo cpupower frequency-info                                                 
analyzing CPU 0:
  driver: amd-pstate
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 131 us
  hardware limits: 400 MHz - 1.90 GHz
  available cpufreq governors: ondemand performance schedutil
  current policy: frequency should be within 1.20 GHz and 1.60 GHz.
                  The governor "schedutil" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 2.60 GHz (asserted by call to kernel)
  boost state support:
    Supported: yes
    Active: no
    AMD PSTATE Highest Performance: 166. Maximum Frequency: 4.51 GHz.
    AMD PSTATE Nominal Performance: 70. Nominal Frequency: 1.90 GHz.
    AMD PSTATE Lowest Non-linear Performance: 41. Lowest Non-linear Frequency:
1.11 GHz.
    AMD PSTATE Lowest Performance: 15. Lowest Frequency: 400 MHz.
```

Other governors (ondemand/performance) works as intended.  
Is it a bug or something else?

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