sound/soc/mediatek/mt6797/mt6797-dai-hostless.c

Source file repositories/reference/linux-study-clean/sound/soc/mediatek/mt6797/mt6797-dai-hostless.c

File Facts

System
Linux kernel
Corpus path
sound/soc/mediatek/mt6797/mt6797-dai-hostless.c
Extension
.c
Size
3423 bytes
Lines
119
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
//
// MediaTek ALSA SoC Audio DAI Hostless Control
//
// Copyright (c) 2018 MediaTek Inc.
// Author: KaiChieh Chuang <kaichieh.chuang@mediatek.com>

#include "mt6797-afe-common.h"

/* dai component */
static const struct snd_soc_dapm_route mtk_dai_hostless_routes[] = {
	/* Hostless ADDA Loopback */
	{"ADDA_DL_CH1", "ADDA_UL_CH1", "Hostless LPBK DL"},
	{"ADDA_DL_CH1", "ADDA_UL_CH2", "Hostless LPBK DL"},
	{"ADDA_DL_CH2", "ADDA_UL_CH1", "Hostless LPBK DL"},
	{"ADDA_DL_CH2", "ADDA_UL_CH2", "Hostless LPBK DL"},
	{"Hostless LPBK UL", NULL, "ADDA Capture"},

	/* Hostless Speech */
	{"ADDA_DL_CH1", "PCM_1_CAP_CH1", "Hostless Speech DL"},
	{"ADDA_DL_CH2", "PCM_1_CAP_CH1", "Hostless Speech DL"},
	{"ADDA_DL_CH2", "PCM_1_CAP_CH2", "Hostless Speech DL"},
	{"ADDA_DL_CH1", "PCM_2_CAP_CH1", "Hostless Speech DL"},
	{"ADDA_DL_CH2", "PCM_2_CAP_CH1", "Hostless Speech DL"},
	{"ADDA_DL_CH2", "PCM_2_CAP_CH2", "Hostless Speech DL"},
	{"PCM_1_PB_CH1", "ADDA_UL_CH1", "Hostless Speech DL"},
	{"PCM_1_PB_CH2", "ADDA_UL_CH2", "Hostless Speech DL"},
	{"PCM_2_PB_CH1", "ADDA_UL_CH1", "Hostless Speech DL"},
	{"PCM_2_PB_CH2", "ADDA_UL_CH2", "Hostless Speech DL"},

	{"Hostless Speech UL", NULL, "PCM 1 Capture"},
	{"Hostless Speech UL", NULL, "PCM 2 Capture"},
	{"Hostless Speech UL", NULL, "ADDA Capture"},
};

/* dai ops */
static int mtk_dai_hostless_startup(struct snd_pcm_substream *substream,
				    struct snd_soc_dai *dai)
{
	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);

	return snd_soc_set_runtime_hwparams(substream, afe->mtk_afe_hardware);
}

static const struct snd_soc_dai_ops mtk_dai_hostless_ops = {
	.startup = mtk_dai_hostless_startup,
};

/* dai driver */
#define MTK_HOSTLESS_RATES (SNDRV_PCM_RATE_8000_48000 |\
			   SNDRV_PCM_RATE_88200 |\
			   SNDRV_PCM_RATE_96000 |\
			   SNDRV_PCM_RATE_176400 |\
			   SNDRV_PCM_RATE_192000)

#define MTK_HOSTLESS_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
			     SNDRV_PCM_FMTBIT_S24_LE |\
			     SNDRV_PCM_FMTBIT_S32_LE)

static struct snd_soc_dai_driver mtk_dai_hostless_driver[] = {
	{
		.name = "Hostless LPBK DAI",
		.id = MT6797_DAI_HOSTLESS_LPBK,
		.playback = {
			.stream_name = "Hostless LPBK DL",
			.channels_min = 1,
			.channels_max = 2,
			.rates = MTK_HOSTLESS_RATES,
			.formats = MTK_HOSTLESS_FORMATS,
		},
		.capture = {
			.stream_name = "Hostless LPBK UL",
			.channels_min = 1,
			.channels_max = 2,
			.rates = MTK_HOSTLESS_RATES,
			.formats = MTK_HOSTLESS_FORMATS,
		},
		.ops = &mtk_dai_hostless_ops,
	},
	{
		.name = "Hostless Speech DAI",
		.id = MT6797_DAI_HOSTLESS_SPEECH,
		.playback = {
			.stream_name = "Hostless Speech DL",
			.channels_min = 1,
			.channels_max = 2,
			.rates = MTK_HOSTLESS_RATES,
			.formats = MTK_HOSTLESS_FORMATS,
		},
		.capture = {

Annotation

Implementation Notes