Navi overdrive incomplete

If I understand the driver documentation right then pp_od_clk_voltage is supposed to give out OD_SCLK, OD_MCLK, OD_VDDC_CURVE and OD_RANGE. While the first three are given, OD_RANGE is not being reported, which is necessary for UI overclock tools. Also: Are the @0mv values in the curve by design, do they have any meaning (like "default voltage" or whatever) or is that by mistake?

$ cat /sys/class/drm/card1/device/pp_od_clk_voltage 
OD_SCLK:
0: 800Mhz
1: 2095Mhz
OD_MCLK:
0: 875MHz
OD_VDDC_CURVE:
0: 800MHz @ 0mV
1: 1447MHz @ 0mV
2: 2095MHz @ 0mV