dmic.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <soc/nhlt.h>
 
static const struct nhlt_format_config dmic_1ch_formats[] = {
        /* 48 KHz 16-bits per sample. */
        {
                .num_channels = 1,
                .sample_freq_khz = 48,
                .container_bits_per_sample = 16,
                .valid_bits_per_sample = 16,
                .speaker_mask = SPEAKER_FRONT_CENTER,
                .settings_file = "dmic-1ch-48khz-16b.bin",
        },
};
 
static const struct nhlt_dmic_array_config dmic_1ch_mic_config = {
        .tdm_config = {
                .config_type = NHLT_TDM_BASIC,
        },
        .array_type = NHLT_MIC_ARRAY_VENDOR_DEFINED,
};
 
static const struct nhlt_endp_descriptor dmic_1ch_descriptors[] = {
        {
                .link = NHLT_LINK_PDM,
                .device = NHLT_PDM_DEV_CAVS15,
                .direction = NHLT_DIR_CAPTURE,
                .vid = NHLT_VID,
                .did = NHLT_DID_DMIC,
                .cfg = &dmic_1ch_mic_config,
                .cfg_size = sizeof(dmic_1ch_mic_config),
                .formats = dmic_1ch_formats,
                .num_formats = ARRAY_SIZE(dmic_1ch_formats),
        },
};
 
static const struct nhlt_format_config dmic_2ch_formats[] = {
        /* 48 KHz 16-bits per sample. */
        {
                .num_channels = 2,
                .sample_freq_khz = 48,
                .container_bits_per_sample = 16,
                .valid_bits_per_sample = 16,
                .speaker_mask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT,
                .settings_file = "dmic-2ch-48khz-16b.bin",
        },
        /* 48 KHz 32-bits per sample. */
        {
                .num_channels = 2,
                .sample_freq_khz = 48,
                .container_bits_per_sample = 32,
                .valid_bits_per_sample = 32,
                .speaker_mask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT,
                .settings_file = "dmic-2ch-48khz-32b.bin",
        },
};
 
static const struct nhlt_dmic_array_config dmic_2ch_mic_config = {
        .tdm_config = {
                .config_type = NHLT_TDM_MIC_ARRAY,
        },
        .array_type = NHLT_MIC_ARRAY_2CH_SMALL,
};
 
static const struct nhlt_endp_descriptor dmic_2ch_descriptors[] = {
        {
                .link = NHLT_LINK_PDM,
                .device = NHLT_PDM_DEV_CAVS15,
                .direction = NHLT_DIR_CAPTURE,
                .vid = NHLT_VID,
                .did = NHLT_DID_DMIC,
                .cfg = &dmic_2ch_mic_config,
                .cfg_size = sizeof(dmic_2ch_mic_config),
                .formats = dmic_2ch_formats,
                .num_formats = ARRAY_SIZE(dmic_2ch_formats),
        },
};
 
static const struct nhlt_format_config dmic_4ch_formats[] = {
        /* 48 KHz 16-bits per sample. */
        {
                .num_channels = 4,
                .sample_freq_khz = 48,
                .container_bits_per_sample = 16,
                .valid_bits_per_sample = 16,
                .speaker_mask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT |
                                SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT,
                .settings_file = "dmic-4ch-48khz-16b.bin",
        },
        /* 48 KHz 32-bits per sample. */
        {
                .num_channels = 4,
                .sample_freq_khz = 48,
                .container_bits_per_sample = 32,
                .valid_bits_per_sample = 32,
                .speaker_mask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT |
                                SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT,
                .settings_file = "dmic-4ch-48khz-32b.bin",
        },
};
 
static const struct nhlt_dmic_array_config dmic_4ch_mic_config = {
        .tdm_config = {
                .config_type = NHLT_TDM_MIC_ARRAY,
        },
        .array_type = NHLT_MIC_ARRAY_4CH_L_SHAPED,
};
 
static const struct nhlt_endp_descriptor dmic_4ch_descriptors[] = {
        {
                .link = NHLT_LINK_PDM,
                .device = NHLT_PDM_DEV_CAVS15,
                .direction = NHLT_DIR_CAPTURE,
                .vid = NHLT_VID,
                .did = NHLT_DID_DMIC,
                .cfg = &dmic_4ch_mic_config,
                .cfg_size = sizeof(dmic_4ch_mic_config),
                .formats = dmic_4ch_formats,
                .num_formats = ARRAY_SIZE(dmic_4ch_formats),
        },
};
 
int nhlt_soc_add_dmic_array(struct nhlt *nhlt, int num_channels)
{
        switch (num_channels) {
        case 1:
                return nhlt_add_endpoints(nhlt, dmic_1ch_descriptors,
                                        ARRAY_SIZE(dmic_1ch_descriptors));
        case 2:
                return nhlt_add_endpoints(nhlt, dmic_2ch_descriptors,
                                        ARRAY_SIZE(dmic_2ch_descriptors));
        case 4:
                return nhlt_add_endpoints(nhlt, dmic_4ch_descriptors,
                                        ARRAY_SIZE(dmic_4ch_descriptors));
        default:
                return -1;
        }
}