[Bug 201201] New: [amdgpu] Can't raise power limit on Vega

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=201201

            Bug ID: 201201
           Summary: [amdgpu] Can't raise power limit on Vega
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.19-rc4
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: mezin.alexander at gmail.com
        Regression: No

On Windows I can increase the power limit to +50% (150%) in wattman. On Linux
for some reason I can only set it lower than the stock value. Any attempts to
write a value that's bigger than the stock one into power1_cap fail with
"Invalid argument":

# echo 320000000 >power1_cap
-bash: echo: write error: Invalid argument

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