sound/soc/mediatek/mt7986/mt7986-afe-pcm.c

Source file repositories/reference/linux-study-clean/sound/soc/mediatek/mt7986/mt7986-afe-pcm.c

File Facts

System
Linux kernel
Corpus path
sound/soc/mediatek/mt7986/mt7986-afe-pcm.c
Extension
.c
Size
16289 bytes
Lines
610
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 AFE platform driver for MT7986
 *
 * Copyright (c) 2023 MediaTek Inc.
 * Authors: Vic Wu <vic.wu@mediatek.com>
 *          Maso Huang <maso.huang@mediatek.com>
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/pm_runtime.h>

#include "mt7986-afe-common.h"
#include "mt7986-reg.h"
#include "../common/mtk-afe-platform-driver.h"
#include "../common/mtk-afe-fe-dai.h"

enum {
	MTK_AFE_RATE_8K = 0,
	MTK_AFE_RATE_11K = 1,
	MTK_AFE_RATE_12K = 2,
	MTK_AFE_RATE_16K = 4,
	MTK_AFE_RATE_22K = 5,
	MTK_AFE_RATE_24K = 6,
	MTK_AFE_RATE_32K = 8,
	MTK_AFE_RATE_44K = 9,
	MTK_AFE_RATE_48K = 10,
	MTK_AFE_RATE_88K = 13,
	MTK_AFE_RATE_96K = 14,
	MTK_AFE_RATE_176K = 17,
	MTK_AFE_RATE_192K = 18,
};

enum {
	CLK_INFRA_AUD_BUS_CK = 0,
	CLK_INFRA_AUD_26M_CK,
	CLK_INFRA_AUD_L_CK,
	CLK_INFRA_AUD_AUD_CK,
	CLK_INFRA_AUD_EG2_CK,
	CLK_NUM
};

static const char *aud_clks[CLK_NUM] = {
	[CLK_INFRA_AUD_BUS_CK] = "aud_bus_ck",
	[CLK_INFRA_AUD_26M_CK] = "aud_26m_ck",
	[CLK_INFRA_AUD_L_CK] = "aud_l_ck",
	[CLK_INFRA_AUD_AUD_CK] = "aud_aud_ck",
	[CLK_INFRA_AUD_EG2_CK] = "aud_eg2_ck",
};

unsigned int mt7986_afe_rate_transform(struct device *dev, unsigned int rate)
{
	switch (rate) {
	case 8000:
		return MTK_AFE_RATE_8K;
	case 11025:
		return MTK_AFE_RATE_11K;
	case 12000:
		return MTK_AFE_RATE_12K;
	case 16000:
		return MTK_AFE_RATE_16K;
	case 22050:
		return MTK_AFE_RATE_22K;
	case 24000:
		return MTK_AFE_RATE_24K;
	case 32000:
		return MTK_AFE_RATE_32K;
	case 44100:
		return MTK_AFE_RATE_44K;
	case 48000:
		return MTK_AFE_RATE_48K;
	case 88200:
		return MTK_AFE_RATE_88K;
	case 96000:
		return MTK_AFE_RATE_96K;
	case 176400:
		return MTK_AFE_RATE_176K;
	case 192000:
		return MTK_AFE_RATE_192K;
	default:
		dev_warn(dev, "%s(), rate %u invalid, using %d!!!\n",
			 __func__, rate, MTK_AFE_RATE_48K);
		return MTK_AFE_RATE_48K;
	}
}

Annotation

Implementation Notes