config SND_SOC_SPRD_VBC_R2P0 tristate # "VBC_R2P0" help config SND_SOC_SPRD_VBC_SRC_OPEN bool "VBC ADC/ADC23 SRC open" depends on SND_SOC_SPRD_VBC_R2P0 help say Y then the VBC will open adc SRC for FM function. config SND_SOC_VBC_SRC_SAMPLE_RATE int "VBC SRC Source Rate (32000 or 48000) unit(HZ)" range 32000 48000 default 32000 depends on SND_SOC_SPRD_VBC_R2P0 help when capture sample rate is 44100HZ, we cann't set 44100 HZ for CODEC adc sample rate, so need to set CODEC sample to 32000/48000, then open VBC SRC changing to 44100HZ..