Pulse Density Modulation (PDM) controller configuration for DMIC. More...

#include <src/include/ipc4/dmic.h>

Collaboration diagram for dmic_pdm_ctrl_cfg:

Data Fields
uint32_t	cic_control
	CIC filter control register value.

uint32_t	cic_config
	CIC filter configuration register value.

uint32_t	rsvd_0
	Reserved padding.

uint32_t	mic_control
	Microphone control register value.

uint32_t	pdmsm
	SoundWire PDM stream mapping (ignored on non-SDW).

uint32_t	reuse_fir_from_pdm
	Index of another PDM controller to reuse FIR coefficients from.

uint32_t	rsvd_1 [2]
	Reserved padding.

struct dmic_fir_cfg	fir_config [2]
	Cascaded FIR decimation filter configurations.

uint32_t	fir_coeffs [0]
	Variable-length array of FIR coefficients (channel A then B).

Detailed Description

Pulse Density Modulation (PDM) controller configuration for DMIC.

Defines the configuration parameters for the PDM control of the DMIC module, including CIC decimation filter, microphone gain/control, SoundWire pin mapping, and dual FIR filter cascades.

Field Documentation

◆ cic_config

uint32_t dmic_pdm_ctrl_cfg::cic_config

CIC filter configuration register value.

◆ cic_control

uint32_t dmic_pdm_ctrl_cfg::cic_control

CIC filter control register value.

◆ fir_coeffs

uint32_t dmic_pdm_ctrl_cfg::fir_coeffs[0]

Variable-length array of FIR coefficients (channel A then B).

◆ fir_config

struct dmic_fir_cfg dmic_pdm_ctrl_cfg::fir_config[2]

Cascaded FIR decimation filter configurations.

◆ mic_control

uint32_t dmic_pdm_ctrl_cfg::mic_control

Microphone control register value.

◆ pdmsm

uint32_t dmic_pdm_ctrl_cfg::pdmsm

SoundWire PDM stream mapping (ignored on non-SDW).

◆ reuse_fir_from_pdm

uint32_t dmic_pdm_ctrl_cfg::reuse_fir_from_pdm

Index of another PDM controller to reuse FIR coefficients from.

◆ rsvd_0

uint32_t dmic_pdm_ctrl_cfg::rsvd_0

Reserved padding.

◆ rsvd_1

uint32_t dmic_pdm_ctrl_cfg::rsvd_1[2]