Mixing two SerialProtocol_XXX on one serial port

[Paul_Paku (Paku)]

# USART1
# for PPM
PA10 TIM1_CH3 TIM1 RCININT PULLDOWN
#for Telemetry
PA9 USART1_TX USART1
define DEFAULT_SERIAL1_PROTOCOL SerialProtocol_FrSky_D

Will it work? Could be SerialProtocol_FrSky_D uses both directions… I just need one.
JHEH743H board