-T flag does not enable bias-t on RSP1A

[Taubin]

I am running the software on a Raspberry pi 4. The software works properly, however the -T flag does not turn on the bias-t when used.

rsp_tcp version 1.0

libmirsdrapi-rsp version 2.13 found
mir_sdr_usb_GetDevices Dev0:vid=1df7 pid=3000 rev=0207 serno=190310A796 bus=001 port=004 devAvail=1
mir_sdr_usb_SetDeviceIdx idx=0 numDevices=1
Opened device with idVendor = 0x1df7 idProduct = 0x3000 fwVersion = 0x0207 busNum = 001 portNum = 004
mir_sdr_Init: starting hardware initialization
mir_sdr_Init: gR=60dB fs=2.000MHz rf=98.800MHz bw=1.536MHz if=0.000MHz
DownConvert: Enable=0 DecM=1 OutScale=0 (fs=2.000000 bw=1536 if=0)
initState: numActivePackets=4
mir_sdr_usb_USB DLL: Revision 0.1.1
mir_sdr_2500_Init: fnaddr = 2 detected, trying to change...
mir_sdr_2500_Init: fnaddr = 2
mir_sdr_2500_Init: adjusting squelch trim 0x1, rx gating enable 1, tx_trim 0, reg2 = 0x4801
initHw: Register7 = 0x000014
initRfFreqDependentHw(1): Tuner Register0 = 0x04f420
mir_sdr_GpioExtWrite: Addr=18 Data=0xe4
mir_sdr_GpioExtWrite: Addr=19 Data=0xff
mir_sdr_GpioExtWrite: Addr=0 Data=0x00
mir_sdr_GpioExtWrite: Addr=1 Data=0x00
mir_sdr_SetFs: Sample Freq requested 2000000.000000
mir_sdr_SetFs: Fs->FsNomHz+dFsHz=2000000.0+0.0Hz=2000000.0Hz FsToggle->1
mir_sdr_SetRf: f->98799999.901Hz (int=20 frac=aef afc=fff) fSynth:3161599996.838
mir_sdr_SetRf: Rf->RfNomHz+dRfHz+LifHz+Lif1Hz=98800000.0+0.0+0.0Hz+0.0Hz=98799999.9Hz RfToggle->1
mir_sdr_SetGr: GR->60[36,24,0,0] gRset->0x224 DCCALmode=3 DCCALspd=0 GrToggle->1
No offset diff1=0x000000fc diff2=0x000000fc
No offset samp1=0x0000285e samp2=0x0000295a samp2=0x00002a56
bufOffset=0
setToggleStates: initialising sampNum=0x00017a02, gainSetting=0x224, FsToggle=1, RfToggle=0, GrToggle=1
setToggleStates: initialising Fs=2000000.000, Rf=98799999.901, Gr=60
**mir_sdr_rsp1a_BiasT: enable = 0**
mir_sdr_GpioExtWrite: Addr=19 Data=0xff
mir_sdr_2500_Readback001Trim: readback = 0xe41ee10
mir_sdr_2500_Bypass001Trim: reg13=0x20d reg14=0x703aee
detected RSP model 'RSP 1A' (hw ver 255)
mir_sdr_DCoffsetIQimbalanceControl: DC:1 IQ:1
mir_sdr_DecimateControl: 0 1 0
mir_sdr_DecimateControl: DecimateEnable=0, DecimateDecM=1, DecimateOutScale=0, DecimateRound[0]=0x00000000, DecimateRound[1]=0x00000000
listening...
^CSignal (2) caught, ask for exit!
mir_sdr_StreamUninit()
mir_sdr_usb_ReleaseDeviceIdx 0
bye!