Southern Islands pp_od_clk_voltage is empty

Submitted by nikos fitilis

Assigned to Default DRI bug account

Link to original bug (#107498)

Description

I have a gcn 1.0 firepro 4000m (7700m) card that I would like to have overdrive capabilities.

The issue is with amdgpu.ppfeaturemask=0xffffffff, /sys/class/drm/card0/device/pp_od_clk_voltage is empty and does not accept commands.