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Cyril Chao
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mtk: add Zephyr native AFE DAI driver
Expose each AFE MEMIF as a Zephyr DAI device via DEVICE_DT_INST_DEFINE. Hardware start/stop is handled by the MEMIF DMA driver; DAI trigger is a no-op. Signed-off-by: Cyril Chao <cyril.chao@mediatek.corp-partner.google.com>
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‎src/drivers/mediatek/afe/zephyr_mtk_dai.c‎

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/*
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* Copyright 2026 MediaTek
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/device.h>
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#include <zephyr/drivers/dai.h>
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#include <zephyr/logging/log.h>
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#include <sof/drivers/afe-drv.h>
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#include <ipc/stream.h>
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#include <ipc/dai.h>
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#include <ipc/dai-mediatek.h>
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#define DT_DRV_COMPAT mediatek_afe
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LOG_MODULE_REGISTER(dai_mtk_afe);
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struct dai_mtk_afe_cfg {
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uint32_t dai_index;
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uint32_t memif_index;
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bool downlink;
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};
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struct dai_mtk_afe_data {
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struct dai_config cfg;
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struct dai_properties tx_props;
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struct dai_properties rx_props;
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};
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static int dai_mtk_afe_probe(const struct device *dev)
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{
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LOG_DBG("%s: probe", dev->name);
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return 0;
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}
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static int dai_mtk_afe_remove(const struct device *dev)
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{
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LOG_DBG("%s: remove", dev->name);
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return 0;
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}
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static int dai_mtk_afe_config_set(const struct device *dev,
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const struct dai_config *cfg,
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const void *bespoke_cfg, size_t size)
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{
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const struct dai_mtk_afe_cfg *dev_cfg = dev->config;
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struct dai_mtk_afe_data *data = dev->data;
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const struct sof_ipc_dai_config *sof_cfg = bespoke_cfg;
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struct mtk_base_afe *afe;
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int ret;
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if (cfg) {
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data->cfg.channels = cfg->channels;
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data->cfg.rate = cfg->rate;
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data->cfg.format = cfg->format;
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data->cfg.word_size = cfg->word_size;
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}
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if (sof_cfg) {
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int probe_ret;
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afe = afe_get();
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probe_ret = afe_probe(afe);
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if (probe_ret < 0) {
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LOG_ERR("%s: afe_probe failed: %d", dev->name, probe_ret);
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return probe_ret;
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}
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ret = afe_dai_set_config(afe, dev_cfg->dai_index,
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sof_cfg->afe.dai_channels,
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sof_cfg->afe.dai_rate,
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sof_cfg->afe.dai_format);
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if (ret < 0) {
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LOG_ERR("%s: afe_dai_set_config failed: %d",
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dev->name, ret);
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return ret;
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}
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LOG_DBG("%s: config_set dai=%u ch=%u rate=%u fmt=%u",
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dev->name, dev_cfg->dai_index,
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sof_cfg->afe.dai_channels,
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sof_cfg->afe.dai_rate,
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sof_cfg->afe.dai_format);
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}
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return 0;
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}
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static int dai_mtk_afe_config_get(const struct device *dev,
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struct dai_config *cfg, enum dai_dir dir)
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{
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const struct dai_mtk_afe_cfg *dev_cfg = dev->config;
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struct dai_mtk_afe_data *data = dev->data;
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if (!cfg) {
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return -EINVAL;
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}
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*cfg = data->cfg;
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cfg->type = DAI_MEDIATEK_AFE;
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cfg->dai_index = dev_cfg->dai_index;
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return 0;
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}
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static const struct dai_properties *dai_mtk_afe_get_properties(
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const struct device *dev, enum dai_dir dir, int stream_id)
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{
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const struct dai_mtk_afe_data *data = dev->data;
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if (dir == DAI_DIR_TX) {
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return &data->tx_props;
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}
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return &data->rx_props;
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}
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static int dai_mtk_afe_trigger(const struct device *dev,
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enum dai_dir dir, enum dai_trigger_cmd cmd)
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{
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LOG_DBG("%s: trigger dir=%d cmd=%d", dev->name, dir, cmd);
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return 0;
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}
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static DEVICE_API(dai, dai_mtk_afe_api) = {
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.probe = dai_mtk_afe_probe,
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.remove = dai_mtk_afe_remove,
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.config_set = dai_mtk_afe_config_set,
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.config_get = dai_mtk_afe_config_get,
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.get_properties = dai_mtk_afe_get_properties,
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.trigger = dai_mtk_afe_trigger,
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};
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#define DAI_MTK_AFE_HANDSHAKE(inst) \
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((inst) << 16) | DT_INST_PROP(inst, dai_id)
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#define DAI_MTK_AFE_INIT(inst) \
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static struct dai_mtk_afe_data dai_mtk_afe_data_##inst = { \
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.cfg = { \
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.type = DAI_MEDIATEK_AFE, \
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.dai_index = DT_INST_PROP(inst, dai_id), \
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}, \
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.tx_props = { \
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.dma_hs_id = DAI_MTK_AFE_HANDSHAKE(inst), \
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}, \
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.rx_props = { \
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.dma_hs_id = DAI_MTK_AFE_HANDSHAKE(inst), \
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}, \
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}; \
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\
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static const struct dai_mtk_afe_cfg dai_mtk_afe_cfg_##inst = { \
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.dai_index = DT_INST_PROP(inst, dai_id), \
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.memif_index = inst, \
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.downlink = DT_INST_PROP(inst, downlink), \
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}; \
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\
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DEVICE_DT_INST_DEFINE(inst, NULL, NULL, \
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&dai_mtk_afe_data_##inst, \
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&dai_mtk_afe_cfg_##inst, \
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POST_KERNEL, CONFIG_DAI_INIT_PRIORITY, \
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&dai_mtk_afe_api);
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DT_INST_FOREACH_STATUS_OKAY(DAI_MTK_AFE_INIT)

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