[Bug 207693] New: amdgpu: RX 5500 XT boost frequency out of spec

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=207693

            Bug ID: 207693
           Summary: amdgpu: RX 5500 XT boost frequency out of spec
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.6.12
          Hardware: All
                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: 0xe2.0x9a.0x9b at gmail.com
        Regression: No

Hello.

A Navi GPU (model: MSI RX 5500 XT Mech OC 8G) installed in my machine defaults
to 1885 MHz in Linux as its maximum frequency. However, in Windows 10 the GPU's
maximum observed operating frequency is 1845 MHz and the manufacturer's website
states that the boost frequency of the GPU is 1845 MHz.

$ cat pp_od_clk_voltage 
OD_VDDC_CURVE:
0: 500MHz @ 730mV
1: 1192MHz @ 774mV
2: 1885MHz @ 1112mV

Sometimes, the printed voltage is 1107mV.

https://www.msi.com/Graphics-card/Radeon-RX-5500-XT-MECH-8G-OC

Windows uses 1845MHz at 1112mV. If Linux is running the GPU at 1885 MHz shouldn't
it also increase its voltage in order to decrease the probability of hardware
errors?

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