Symbol: ESO_MIXREG_MPM_PREAMP
sys/dev/pci/eso.c
1834
mpm &= ~(ESO_MIXREG_MPM_PREAMP | ESO_MIXREG_MPM_RESV0);
sys/dev/pci/eso.c
1835
mpm |= (preamp ? ESO_MIXREG_MPM_PREAMP : 0);