These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 1317 insertions, 0 deletions

diff --git a/kernel/sound/soc/mediatek/mtk-afe-pcm.c b/kernel/sound/soc/mediatek/mtk-afe-pcm.c
new file mode 100644
index 000000000..f5baf3c38
--- /dev/null
+++ b/kernel/sound/soc/mediatek/mtk-afe-pcm.c
@@ -0,0 +1,1317 @@
+/*
+ * Mediatek ALSA SoC AFE platform driver
+ *
+ * Copyright (c) 2015 MediaTek Inc.
+ * Author: Koro Chen <koro.chen@mediatek.com>
+ *             Sascha Hauer <s.hauer@pengutronix.de>
+ *             Hidalgo Huang <hidalgo.huang@mediatek.com>
+ *             Ir Lian <ir.lian@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/pm_runtime.h>
+#include <sound/soc.h>
+#include "mtk-afe-common.h"
+
+/*****************************************************************************
+ *                  R E G I S T E R       D E F I N I T I O N
+ *****************************************************************************/
+#define AUDIO_TOP_CON0		0x0000
+#define AUDIO_TOP_CON1		0x0004
+#define AFE_DAC_CON0		0x0010
+#define AFE_DAC_CON1		0x0014
+#define AFE_I2S_CON1		0x0034
+#define AFE_I2S_CON2		0x0038
+#define AFE_CONN_24BIT		0x006c
+
+#define AFE_CONN1		0x0024
+#define AFE_CONN2		0x0028
+#define AFE_CONN7		0x0460
+#define AFE_CONN8		0x0464
+#define AFE_HDMI_CONN0		0x0390
+
+/* Memory interface */
+#define AFE_DL1_BASE		0x0040
+#define AFE_DL1_CUR		0x0044
+#define AFE_DL1_END		0x0048
+#define AFE_DL2_BASE		0x0050
+#define AFE_DL2_CUR		0x0054
+#define AFE_AWB_BASE		0x0070
+#define AFE_AWB_CUR		0x007c
+#define AFE_VUL_BASE		0x0080
+#define AFE_VUL_CUR		0x008c
+#define AFE_VUL_END		0x0088
+#define AFE_DAI_BASE		0x0090
+#define AFE_DAI_CUR		0x009c
+#define AFE_MOD_PCM_BASE	0x0330
+#define AFE_MOD_PCM_CUR		0x033c
+#define AFE_HDMI_OUT_BASE	0x0374
+#define AFE_HDMI_OUT_CUR	0x0378
+#define AFE_HDMI_OUT_END	0x037c
+
+#define AFE_ADDA2_TOP_CON0	0x0600
+
+#define AFE_HDMI_OUT_CON0	0x0370
+
+#define AFE_IRQ_MCU_CON		0x03a0
+#define AFE_IRQ_STATUS		0x03a4
+#define AFE_IRQ_CLR		0x03a8
+#define AFE_IRQ_CNT1		0x03ac
+#define AFE_IRQ_CNT2		0x03b0
+#define AFE_IRQ_MCU_EN		0x03b4
+#define AFE_IRQ_CNT5		0x03bc
+#define AFE_IRQ_CNT7		0x03dc
+
+#define AFE_TDM_CON1		0x0548
+#define AFE_TDM_CON2		0x054c
+
+#define AFE_BASE_END_OFFSET	8
+#define AFE_IRQ_STATUS_BITS	0xff
+
+/* AUDIO_TOP_CON0 (0x0000) */
+#define AUD_TCON0_PDN_SPDF		(0x1 << 21)
+#define AUD_TCON0_PDN_HDMI		(0x1 << 20)
+#define AUD_TCON0_PDN_24M		(0x1 << 9)
+#define AUD_TCON0_PDN_22M		(0x1 << 8)
+#define AUD_TCON0_PDN_AFE		(0x1 << 2)
+
+/* AFE_I2S_CON1 (0x0034) */
+#define AFE_I2S_CON1_LOW_JITTER_CLK	(0x1 << 12)
+#define AFE_I2S_CON1_RATE(x)		(((x) & 0xf) << 8)
+#define AFE_I2S_CON1_FORMAT_I2S		(0x1 << 3)
+#define AFE_I2S_CON1_EN			(0x1 << 0)
+
+/* AFE_I2S_CON2 (0x0038) */
+#define AFE_I2S_CON2_LOW_JITTER_CLK	(0x1 << 12)
+#define AFE_I2S_CON2_RATE(x)		(((x) & 0xf) << 8)
+#define AFE_I2S_CON2_FORMAT_I2S		(0x1 << 3)
+#define AFE_I2S_CON2_EN			(0x1 << 0)
+
+/* AFE_CONN_24BIT (0x006c) */
+#define AFE_CONN_24BIT_O04		(0x1 << 4)
+#define AFE_CONN_24BIT_O03		(0x1 << 3)
+
+/* AFE_HDMI_CONN0 (0x0390) */
+#define AFE_HDMI_CONN0_O37_I37		(0x7 << 21)
+#define AFE_HDMI_CONN0_O36_I36		(0x6 << 18)
+#define AFE_HDMI_CONN0_O35_I33		(0x3 << 15)
+#define AFE_HDMI_CONN0_O34_I32		(0x2 << 12)
+#define AFE_HDMI_CONN0_O33_I35		(0x5 << 9)
+#define AFE_HDMI_CONN0_O32_I34		(0x4 << 6)
+#define AFE_HDMI_CONN0_O31_I31		(0x1 << 3)
+#define AFE_HDMI_CONN0_O30_I30		(0x0 << 0)
+
+/* AFE_TDM_CON1 (0x0548) */
+#define AFE_TDM_CON1_LRCK_WIDTH(x)	(((x) - 1) << 24)
+#define AFE_TDM_CON1_32_BCK_CYCLES	(0x2 << 12)
+#define AFE_TDM_CON1_WLEN_32BIT		(0x2 << 8)
+#define AFE_TDM_CON1_MSB_ALIGNED	(0x1 << 4)
+#define AFE_TDM_CON1_1_BCK_DELAY	(0x1 << 3)
+#define AFE_TDM_CON1_BCK_INV		(0x1 << 1)
+#define AFE_TDM_CON1_EN			(0x1 << 0)
+
+enum afe_tdm_ch_start {
+	AFE_TDM_CH_START_O30_O31 = 0,
+	AFE_TDM_CH_START_O32_O33,
+	AFE_TDM_CH_START_O34_O35,
+	AFE_TDM_CH_START_O36_O37,
+	AFE_TDM_CH_ZERO,
+};
+
+static const unsigned int mtk_afe_backup_list[] = {
+	AUDIO_TOP_CON0,
+	AFE_CONN1,
+	AFE_CONN2,
+	AFE_CONN7,
+	AFE_CONN8,
+	AFE_DAC_CON1,
+	AFE_DL1_BASE,
+	AFE_DL1_END,
+	AFE_VUL_BASE,
+	AFE_VUL_END,
+	AFE_HDMI_OUT_BASE,
+	AFE_HDMI_OUT_END,
+	AFE_HDMI_CONN0,
+	AFE_DAC_CON0,
+};
+
+struct mtk_afe {
+	/* address for ioremap audio hardware register */
+	void __iomem *base_addr;
+	struct device *dev;
+	struct regmap *regmap;
+	struct mtk_afe_memif memif[MTK_AFE_MEMIF_NUM];
+	struct clk *clocks[MTK_CLK_NUM];
+	unsigned int backup_regs[ARRAY_SIZE(mtk_afe_backup_list)];
+	bool suspended;
+};
+
+static const struct snd_pcm_hardware mtk_afe_hardware = {
+	.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+		 SNDRV_PCM_INFO_MMAP_VALID),
+	.buffer_bytes_max = 256 * 1024,
+	.period_bytes_min = 512,
+	.period_bytes_max = 128 * 1024,
+	.periods_min = 2,
+	.periods_max = 256,
+	.fifo_size = 0,
+};
+
+static snd_pcm_uframes_t mtk_afe_pcm_pointer
+			 (struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct mtk_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+
+	return bytes_to_frames(substream->runtime, memif->hw_ptr);
+}
+
+static const struct snd_pcm_ops mtk_afe_pcm_ops = {
+	.ioctl = snd_pcm_lib_ioctl,
+	.pointer = mtk_afe_pcm_pointer,
+};
+
+static int mtk_afe_pcm_new(struct snd_soc_pcm_runtime *rtd)
+{
+	size_t size;
+	struct snd_card *card = rtd->card->snd_card;
+	struct snd_pcm *pcm = rtd->pcm;
+
+	size = mtk_afe_hardware.buffer_bytes_max;
+
+	return snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+						     card->dev, size, size);
+}
+
+static void mtk_afe_pcm_free(struct snd_pcm *pcm)
+{
+	snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+static const struct snd_soc_platform_driver mtk_afe_pcm_platform = {
+	.ops = &mtk_afe_pcm_ops,
+	.pcm_new = mtk_afe_pcm_new,
+	.pcm_free = mtk_afe_pcm_free,
+};
+
+struct mtk_afe_rate {
+	unsigned int rate;
+	unsigned int regvalue;
+};
+
+static const struct mtk_afe_rate mtk_afe_i2s_rates[] = {
+	{ .rate = 8000, .regvalue = 0 },
+	{ .rate = 11025, .regvalue = 1 },
+	{ .rate = 12000, .regvalue = 2 },
+	{ .rate = 16000, .regvalue = 4 },
+	{ .rate = 22050, .regvalue = 5 },
+	{ .rate = 24000, .regvalue = 6 },
+	{ .rate = 32000, .regvalue = 8 },
+	{ .rate = 44100, .regvalue = 9 },
+	{ .rate = 48000, .regvalue = 10 },
+	{ .rate = 88000, .regvalue = 11 },
+	{ .rate = 96000, .regvalue = 12 },
+	{ .rate = 174000, .regvalue = 13 },
+	{ .rate = 192000, .regvalue = 14 },
+};
+
+static int mtk_afe_i2s_fs(unsigned int sample_rate)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(mtk_afe_i2s_rates); i++)
+		if (mtk_afe_i2s_rates[i].rate == sample_rate)
+			return mtk_afe_i2s_rates[i].regvalue;
+
+	return -EINVAL;
+}
+
+static int mtk_afe_set_i2s(struct mtk_afe *afe, unsigned int rate)
+{
+	unsigned int val;
+	int fs = mtk_afe_i2s_fs(rate);
+
+	if (fs < 0)
+		return -EINVAL;
+
+	/* from external ADC */
+	regmap_update_bits(afe->regmap, AFE_ADDA2_TOP_CON0, 0x1, 0x1);
+
+	/* set input */
+	val = AFE_I2S_CON2_LOW_JITTER_CLK |
+	      AFE_I2S_CON2_RATE(fs) |
+	      AFE_I2S_CON2_FORMAT_I2S;
+
+	regmap_update_bits(afe->regmap, AFE_I2S_CON2, ~AFE_I2S_CON2_EN, val);
+
+	/* set output */
+	val = AFE_I2S_CON1_LOW_JITTER_CLK |
+	      AFE_I2S_CON1_RATE(fs) |
+	      AFE_I2S_CON1_FORMAT_I2S;
+
+	regmap_update_bits(afe->regmap, AFE_I2S_CON1, ~AFE_I2S_CON1_EN, val);
+	return 0;
+}
+
+static void mtk_afe_set_i2s_enable(struct mtk_afe *afe, bool enable)
+{
+	unsigned int val;
+
+	regmap_read(afe->regmap, AFE_I2S_CON2, &val);
+	if (!!(val & AFE_I2S_CON2_EN) == enable)
+		return; /* must skip soft reset */
+
+	/* I2S soft reset begin */
+	regmap_update_bits(afe->regmap, AUDIO_TOP_CON1, 0x4, 0x4);
+
+	/* input */
+	regmap_update_bits(afe->regmap, AFE_I2S_CON2, 0x1, enable);
+
+	/* output */
+	regmap_update_bits(afe->regmap, AFE_I2S_CON1, 0x1, enable);
+
+	/* I2S soft reset end */
+	udelay(1);
+	regmap_update_bits(afe->regmap, AUDIO_TOP_CON1, 0x4, 0);
+}
+
+static int mtk_afe_dais_enable_clks(struct mtk_afe *afe,
+				    struct clk *m_ck, struct clk *b_ck)
+{
+	int ret;
+
+	if (m_ck) {
+		ret = clk_prepare_enable(m_ck);
+		if (ret) {
+			dev_err(afe->dev, "Failed to enable m_ck\n");
+			return ret;
+		}
+		regmap_update_bits(afe->regmap, AUDIO_TOP_CON0,
+				   AUD_TCON0_PDN_22M | AUD_TCON0_PDN_24M, 0);
+	}
+
+	if (b_ck) {
+		ret = clk_prepare_enable(b_ck);
+		if (ret) {
+			dev_err(afe->dev, "Failed to enable b_ck\n");
+			return ret;
+		}
+	}
+	return 0;
+}
+
+static int mtk_afe_dais_set_clks(struct mtk_afe *afe,
+				 struct clk *m_ck, unsigned int mck_rate,
+				 struct clk *b_ck, unsigned int bck_rate)
+{
+	int ret;
+
+	if (m_ck) {
+		ret = clk_set_rate(m_ck, mck_rate);
+		if (ret) {
+			dev_err(afe->dev, "Failed to set m_ck rate\n");
+			return ret;
+		}
+	}
+
+	if (b_ck) {
+		ret = clk_set_rate(b_ck, bck_rate);
+		if (ret) {
+			dev_err(afe->dev, "Failed to set b_ck rate\n");
+			return ret;
+		}
+	}
+	return 0;
+}
+
+static void mtk_afe_dais_disable_clks(struct mtk_afe *afe,
+				      struct clk *m_ck, struct clk *b_ck)
+{
+	if (m_ck) {
+		regmap_update_bits(afe->regmap, AUDIO_TOP_CON0,
+				   AUD_TCON0_PDN_22M | AUD_TCON0_PDN_24M,
+				   AUD_TCON0_PDN_22M | AUD_TCON0_PDN_24M);
+		clk_disable_unprepare(m_ck);
+	}
+	if (b_ck)
+		clk_disable_unprepare(b_ck);
+}
+
+static int mtk_afe_i2s_startup(struct snd_pcm_substream *substream,
+			       struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+
+	if (dai->active)
+		return 0;
+
+	mtk_afe_dais_enable_clks(afe, afe->clocks[MTK_CLK_I2S1_M], NULL);
+	return 0;
+}
+
+static void mtk_afe_i2s_shutdown(struct snd_pcm_substream *substream,
+				 struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+
+	if (dai->active)
+		return;
+
+	mtk_afe_set_i2s_enable(afe, false);
+	mtk_afe_dais_disable_clks(afe, afe->clocks[MTK_CLK_I2S1_M], NULL);
+
+	/* disable AFE */
+	regmap_update_bits(afe->regmap, AFE_DAC_CON0, 0x1, 0);
+}
+
+static int mtk_afe_i2s_prepare(struct snd_pcm_substream *substream,
+			       struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_pcm_runtime * const runtime = substream->runtime;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	int ret;
+
+	mtk_afe_dais_set_clks(afe,
+			      afe->clocks[MTK_CLK_I2S1_M], runtime->rate * 256,
+			      NULL, 0);
+	/* config I2S */
+	ret = mtk_afe_set_i2s(afe, substream->runtime->rate);
+	if (ret)
+		return ret;
+
+	mtk_afe_set_i2s_enable(afe, true);
+
+	return 0;
+}
+
+static int mtk_afe_hdmi_startup(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+
+	if (dai->active)
+		return 0;
+
+	mtk_afe_dais_enable_clks(afe, afe->clocks[MTK_CLK_I2S3_M],
+				 afe->clocks[MTK_CLK_I2S3_B]);
+	return 0;
+}
+
+static void mtk_afe_hdmi_shutdown(struct snd_pcm_substream *substream,
+				  struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+
+	if (dai->active)
+		return;
+
+	mtk_afe_dais_disable_clks(afe, afe->clocks[MTK_CLK_I2S3_M],
+				  afe->clocks[MTK_CLK_I2S3_B]);
+
+	/* disable AFE */
+	regmap_update_bits(afe->regmap, AFE_DAC_CON0, 0x1, 0);
+}
+
+static int mtk_afe_hdmi_prepare(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_pcm_runtime * const runtime = substream->runtime;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	unsigned int val;
+
+	mtk_afe_dais_set_clks(afe,
+			      afe->clocks[MTK_CLK_I2S3_M], runtime->rate * 128,
+			      afe->clocks[MTK_CLK_I2S3_B],
+			      runtime->rate * runtime->channels * 32);
+
+	val = AFE_TDM_CON1_BCK_INV |
+	      AFE_TDM_CON1_1_BCK_DELAY |
+	      AFE_TDM_CON1_MSB_ALIGNED | /* I2S mode */
+	      AFE_TDM_CON1_WLEN_32BIT |
+	      AFE_TDM_CON1_32_BCK_CYCLES |
+	      AFE_TDM_CON1_LRCK_WIDTH(32);
+	regmap_update_bits(afe->regmap, AFE_TDM_CON1, ~AFE_TDM_CON1_EN, val);
+
+	/* set tdm2 config */
+	switch (runtime->channels) {
+	case 1:
+	case 2:
+		val = AFE_TDM_CH_START_O30_O31;
+		val |= (AFE_TDM_CH_ZERO << 4);
+		val |= (AFE_TDM_CH_ZERO << 8);
+		val |= (AFE_TDM_CH_ZERO << 12);
+		break;
+	case 3:
+	case 4:
+		val = AFE_TDM_CH_START_O30_O31;
+		val |= (AFE_TDM_CH_START_O32_O33 << 4);
+		val |= (AFE_TDM_CH_ZERO << 8);
+		val |= (AFE_TDM_CH_ZERO << 12);
+		break;
+	case 5:
+	case 6:
+		val = AFE_TDM_CH_START_O30_O31;
+		val |= (AFE_TDM_CH_START_O32_O33 << 4);
+		val |= (AFE_TDM_CH_START_O34_O35 << 8);
+		val |= (AFE_TDM_CH_ZERO << 12);
+		break;
+	case 7:
+	case 8:
+		val = AFE_TDM_CH_START_O30_O31;
+		val |= (AFE_TDM_CH_START_O32_O33 << 4);
+		val |= (AFE_TDM_CH_START_O34_O35 << 8);
+		val |= (AFE_TDM_CH_START_O36_O37 << 12);
+		break;
+	default:
+		val = 0;
+	}
+	regmap_update_bits(afe->regmap, AFE_TDM_CON2, 0x0000ffff, val);
+
+	regmap_update_bits(afe->regmap, AFE_HDMI_OUT_CON0,
+			   0x000000f0, runtime->channels << 4);
+	return 0;
+}
+
+static int mtk_afe_hdmi_trigger(struct snd_pcm_substream *substream, int cmd,
+				struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+
+	dev_info(afe->dev, "%s cmd=%d %s\n", __func__, cmd, dai->name);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+		regmap_update_bits(afe->regmap, AUDIO_TOP_CON0,
+				   AUD_TCON0_PDN_HDMI | AUD_TCON0_PDN_SPDF, 0);
+
+		/* set connections:  O30~O37: L/R/LS/RS/C/LFE/CH7/CH8 */
+		regmap_write(afe->regmap, AFE_HDMI_CONN0,
+			     AFE_HDMI_CONN0_O30_I30 | AFE_HDMI_CONN0_O31_I31 |
+			     AFE_HDMI_CONN0_O32_I34 | AFE_HDMI_CONN0_O33_I35 |
+			     AFE_HDMI_CONN0_O34_I32 | AFE_HDMI_CONN0_O35_I33 |
+			     AFE_HDMI_CONN0_O36_I36 | AFE_HDMI_CONN0_O37_I37);
+
+		/* enable Out control */
+		regmap_update_bits(afe->regmap, AFE_HDMI_OUT_CON0, 0x1, 0x1);
+
+		/* enable tdm */
+		regmap_update_bits(afe->regmap, AFE_TDM_CON1, 0x1, 0x1);
+
+		return 0;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		/* disable tdm */
+		regmap_update_bits(afe->regmap, AFE_TDM_CON1, 0x1, 0);
+
+		/* disable Out control */
+		regmap_update_bits(afe->regmap, AFE_HDMI_OUT_CON0, 0x1, 0);
+
+		regmap_update_bits(afe->regmap, AUDIO_TOP_CON0,
+				   AUD_TCON0_PDN_HDMI | AUD_TCON0_PDN_SPDF,
+				   AUD_TCON0_PDN_HDMI | AUD_TCON0_PDN_SPDF);
+
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mtk_afe_dais_startup(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct mtk_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+	int ret;
+
+	memif->substream = substream;
+
+	snd_soc_set_runtime_hwparams(substream, &mtk_afe_hardware);
+
+	/*
+	 * Capture cannot use ping-pong buffer since hw_ptr at IRQ may be
+	 * smaller than period_size due to AFE's internal buffer.
+	 * This easily leads to overrun when avail_min is period_size.
+	 * One more period can hold the possible unread buffer.
+	 */
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+		ret = snd_pcm_hw_constraint_minmax(runtime,
+						   SNDRV_PCM_HW_PARAM_PERIODS,
+						   3,
+						   mtk_afe_hardware.periods_max);
+		if (ret < 0) {
+			dev_err(afe->dev, "hw_constraint_minmax failed\n");
+			return ret;
+		}
+	}
+	ret = snd_pcm_hw_constraint_integer(runtime,
+					    SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0)
+		dev_err(afe->dev, "snd_pcm_hw_constraint_integer failed\n");
+	return ret;
+}
+
+static void mtk_afe_dais_shutdown(struct snd_pcm_substream *substream,
+				  struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct mtk_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+
+	memif->substream = NULL;
+}
+
+static int mtk_afe_dais_hw_params(struct snd_pcm_substream *substream,
+				  struct snd_pcm_hw_params *params,
+				  struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct mtk_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+	int ret;
+
+	dev_dbg(afe->dev,
+		"%s period = %u, rate= %u, channels=%u\n",
+		__func__, params_period_size(params), params_rate(params),
+		params_channels(params));
+
+	ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
+	if (ret < 0)
+		return ret;
+
+	memif->phys_buf_addr = substream->runtime->dma_addr;
+	memif->buffer_size = substream->runtime->dma_bytes;
+	memif->hw_ptr = 0;
+
+	/* start */
+	regmap_write(afe->regmap,
+		     memif->data->reg_ofs_base, memif->phys_buf_addr);
+	/* end */
+	regmap_write(afe->regmap,
+		     memif->data->reg_ofs_base + AFE_BASE_END_OFFSET,
+		     memif->phys_buf_addr + memif->buffer_size - 1);
+
+	/* set channel */
+	if (memif->data->mono_shift >= 0) {
+		unsigned int mono = (params_channels(params) == 1) ? 1 : 0;
+
+		regmap_update_bits(afe->regmap, AFE_DAC_CON1,
+				   1 << memif->data->mono_shift,
+				   mono << memif->data->mono_shift);
+	}
+
+	/* set rate */
+	if (memif->data->fs_shift < 0)
+		return 0;
+	if (memif->data->id == MTK_AFE_MEMIF_DAI ||
+	    memif->data->id == MTK_AFE_MEMIF_MOD_DAI) {
+		unsigned int val;
+
+		switch (params_rate(params)) {
+		case 8000:
+			val = 0;
+			break;
+		case 16000:
+			val = 1;
+			break;
+		case 32000:
+			val = 2;
+			break;
+		default:
+			return -EINVAL;
+		}
+
+		if (memif->data->id == MTK_AFE_MEMIF_DAI)
+			regmap_update_bits(afe->regmap, AFE_DAC_CON0,
+					   0x3 << memif->data->fs_shift,
+					   val << memif->data->fs_shift);
+		else
+			regmap_update_bits(afe->regmap, AFE_DAC_CON1,
+					   0x3 << memif->data->fs_shift,
+					   val << memif->data->fs_shift);
+
+	} else {
+		int fs = mtk_afe_i2s_fs(params_rate(params));
+
+		if (fs < 0)
+			return -EINVAL;
+
+		regmap_update_bits(afe->regmap, AFE_DAC_CON1,
+				   0xf << memif->data->fs_shift,
+				   fs << memif->data->fs_shift);
+	}
+
+	return 0;
+}
+
+static int mtk_afe_dais_hw_free(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+
+static int mtk_afe_dais_prepare(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+
+	/* enable AFE */
+	regmap_update_bits(afe->regmap, AFE_DAC_CON0, 0x1, 0x1);
+	return 0;
+}
+
+static int mtk_afe_dais_trigger(struct snd_pcm_substream *substream, int cmd,
+				struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_pcm_runtime * const runtime = substream->runtime;
+	struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct mtk_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+	unsigned int counter = runtime->period_size;
+
+	dev_info(afe->dev, "%s %s cmd=%d\n", __func__, memif->data->name, cmd);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+		if (memif->data->enable_shift >= 0)
+			regmap_update_bits(afe->regmap, AFE_DAC_CON0,
+					   1 << memif->data->enable_shift,
+					   1 << memif->data->enable_shift);
+
+		/* set irq counter */
+		regmap_update_bits(afe->regmap,
+				   memif->data->irq_reg_cnt,
+				   0x3ffff << memif->data->irq_cnt_shift,
+				   counter << memif->data->irq_cnt_shift);
+
+		/* set irq fs */
+		if (memif->data->irq_fs_shift >= 0) {
+			int fs = mtk_afe_i2s_fs(runtime->rate);
+
+			if (fs < 0)
+				return -EINVAL;
+
+			regmap_update_bits(afe->regmap,
+					   AFE_IRQ_MCU_CON,
+					   0xf << memif->data->irq_fs_shift,
+					   fs << memif->data->irq_fs_shift);
+		}
+		/* enable interrupt */
+		regmap_update_bits(afe->regmap, AFE_IRQ_MCU_CON,
+				   1 << memif->data->irq_en_shift,
+				   1 << memif->data->irq_en_shift);
+
+		return 0;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		if (memif->data->enable_shift >= 0)
+			regmap_update_bits(afe->regmap, AFE_DAC_CON0,
+					   1 << memif->data->enable_shift, 0);
+		/* disable interrupt */
+		regmap_update_bits(afe->regmap, AFE_IRQ_MCU_CON,
+				   1 << memif->data->irq_en_shift,
+				   0 << memif->data->irq_en_shift);
+		/* and clear pending IRQ */
+		regmap_write(afe->regmap, AFE_IRQ_CLR,
+			     1 << memif->data->irq_clr_shift);
+		memif->hw_ptr = 0;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+/* FE DAIs */
+static const struct snd_soc_dai_ops mtk_afe_dai_ops = {
+	.startup	= mtk_afe_dais_startup,
+	.shutdown	= mtk_afe_dais_shutdown,
+	.hw_params	= mtk_afe_dais_hw_params,
+	.hw_free	= mtk_afe_dais_hw_free,
+	.prepare	= mtk_afe_dais_prepare,
+	.trigger	= mtk_afe_dais_trigger,
+};
+
+/* BE DAIs */
+static const struct snd_soc_dai_ops mtk_afe_i2s_ops = {
+	.startup	= mtk_afe_i2s_startup,
+	.shutdown	= mtk_afe_i2s_shutdown,
+	.prepare	= mtk_afe_i2s_prepare,
+};
+
+static const struct snd_soc_dai_ops mtk_afe_hdmi_ops = {
+	.startup	= mtk_afe_hdmi_startup,
+	.shutdown	= mtk_afe_hdmi_shutdown,
+	.prepare	= mtk_afe_hdmi_prepare,
+	.trigger	= mtk_afe_hdmi_trigger,
+
+};
+
+static int mtk_afe_runtime_suspend(struct device *dev);
+static int mtk_afe_runtime_resume(struct device *dev);
+
+static int mtk_afe_dai_suspend(struct snd_soc_dai *dai)
+{
+	struct mtk_afe *afe = snd_soc_dai_get_drvdata(dai);
+	int i;
+
+	dev_dbg(afe->dev, "%s\n", __func__);
+	if (pm_runtime_status_suspended(afe->dev) || afe->suspended)
+		return 0;
+
+	for (i = 0; i < ARRAY_SIZE(mtk_afe_backup_list); i++)
+		regmap_read(afe->regmap, mtk_afe_backup_list[i],
+			    &afe->backup_regs[i]);
+
+	afe->suspended = true;
+	mtk_afe_runtime_suspend(afe->dev);
+	return 0;
+}
+
+static int mtk_afe_dai_resume(struct snd_soc_dai *dai)
+{
+	struct mtk_afe *afe = snd_soc_dai_get_drvdata(dai);
+	int i = 0;
+
+	dev_dbg(afe->dev, "%s\n", __func__);
+	if (pm_runtime_status_suspended(afe->dev) || !afe->suspended)
+		return 0;
+
+	mtk_afe_runtime_resume(afe->dev);
+
+	for (i = 0; i < ARRAY_SIZE(mtk_afe_backup_list); i++)
+		regmap_write(afe->regmap, mtk_afe_backup_list[i],
+			     afe->backup_regs[i]);
+
+	afe->suspended = false;
+	return 0;
+}
+
+static struct snd_soc_dai_driver mtk_afe_pcm_dais[] = {
+	/* FE DAIs: memory intefaces to CPU */
+	{
+		.name = "DL1", /* downlink 1 */
+		.id = MTK_AFE_MEMIF_DL1,
+		.suspend = mtk_afe_dai_suspend,
+		.resume = mtk_afe_dai_resume,
+		.playback = {
+			.stream_name = "DL1",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+		.ops = &mtk_afe_dai_ops,
+	}, {
+		.name = "VUL", /* voice uplink */
+		.id = MTK_AFE_MEMIF_VUL,
+		.suspend = mtk_afe_dai_suspend,
+		.resume = mtk_afe_dai_resume,
+		.capture = {
+			.stream_name = "VUL",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+		.ops = &mtk_afe_dai_ops,
+	}, {
+	/* BE DAIs */
+		.name = "I2S",
+		.id = MTK_AFE_IO_I2S,
+		.playback = {
+			.stream_name = "I2S Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+		.capture = {
+			.stream_name = "I2S Capture",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+		.ops = &mtk_afe_i2s_ops,
+		.symmetric_rates = 1,
+	},
+};
+
+static struct snd_soc_dai_driver mtk_afe_hdmi_dais[] = {
+	/* FE DAIs */
+	{
+		.name = "HDMI",
+		.id = MTK_AFE_MEMIF_HDMI,
+		.suspend = mtk_afe_dai_suspend,
+		.resume = mtk_afe_dai_resume,
+		.playback = {
+			.stream_name = "HDMI",
+			.channels_min = 2,
+			.channels_max = 8,
+			.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
+				SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
+				SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
+				SNDRV_PCM_RATE_192000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+		.ops = &mtk_afe_dai_ops,
+	}, {
+	/* BE DAIs */
+		.name = "HDMIO",
+		.id = MTK_AFE_IO_HDMI,
+		.playback = {
+			.stream_name = "HDMIO Playback",
+			.channels_min = 2,
+			.channels_max = 8,
+			.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
+				SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
+				SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
+				SNDRV_PCM_RATE_192000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+		.ops = &mtk_afe_hdmi_ops,
+	},
+};
+
+static const struct snd_kcontrol_new mtk_afe_o03_mix[] = {
+	SOC_DAPM_SINGLE_AUTODISABLE("I05 Switch", AFE_CONN1, 21, 1, 0),
+};
+
+static const struct snd_kcontrol_new mtk_afe_o04_mix[] = {
+	SOC_DAPM_SINGLE_AUTODISABLE("I06 Switch", AFE_CONN2, 6, 1, 0),
+};
+
+static const struct snd_kcontrol_new mtk_afe_o09_mix[] = {
+	SOC_DAPM_SINGLE_AUTODISABLE("I17 Switch", AFE_CONN7, 30, 1, 0),
+};
+
+static const struct snd_kcontrol_new mtk_afe_o10_mix[] = {
+	SOC_DAPM_SINGLE_AUTODISABLE("I18 Switch", AFE_CONN8, 0, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget mtk_afe_pcm_widgets[] = {
+	/* inter-connections */
+	SND_SOC_DAPM_MIXER("I05", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_MIXER("I06", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_MIXER("I17", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_MIXER("I18", SND_SOC_NOPM, 0, 0, NULL, 0),
+
+	SND_SOC_DAPM_MIXER("O03", SND_SOC_NOPM, 0, 0,
+			   mtk_afe_o03_mix, ARRAY_SIZE(mtk_afe_o03_mix)),
+	SND_SOC_DAPM_MIXER("O04", SND_SOC_NOPM, 0, 0,
+			   mtk_afe_o04_mix, ARRAY_SIZE(mtk_afe_o04_mix)),
+	SND_SOC_DAPM_MIXER("O09", SND_SOC_NOPM, 0, 0,
+			   mtk_afe_o09_mix, ARRAY_SIZE(mtk_afe_o09_mix)),
+	SND_SOC_DAPM_MIXER("O10", SND_SOC_NOPM, 0, 0,
+			   mtk_afe_o10_mix, ARRAY_SIZE(mtk_afe_o10_mix)),
+};
+
+static const struct snd_soc_dapm_route mtk_afe_pcm_routes[] = {
+	{"I05", NULL, "DL1"},
+	{"I06", NULL, "DL1"},
+	{"I2S Playback", NULL, "O03"},
+	{"I2S Playback", NULL, "O04"},
+	{"VUL", NULL, "O09"},
+	{"VUL", NULL, "O10"},
+	{"I17", NULL, "I2S Capture"},
+	{"I18", NULL, "I2S Capture"},
+	{ "O03", "I05 Switch", "I05" },
+	{ "O04", "I06 Switch", "I06" },
+	{ "O09", "I17 Switch", "I17" },
+	{ "O10", "I18 Switch", "I18" },
+};
+
+static const struct snd_soc_dapm_route mtk_afe_hdmi_routes[] = {
+	{"HDMIO Playback", NULL, "HDMI"},
+};
+
+static const struct snd_soc_component_driver mtk_afe_pcm_dai_component = {
+	.name = "mtk-afe-pcm-dai",
+	.dapm_widgets = mtk_afe_pcm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(mtk_afe_pcm_widgets),
+	.dapm_routes = mtk_afe_pcm_routes,
+	.num_dapm_routes = ARRAY_SIZE(mtk_afe_pcm_routes),
+};
+
+static const struct snd_soc_component_driver mtk_afe_hdmi_dai_component = {
+	.name = "mtk-afe-hdmi-dai",
+	.dapm_routes = mtk_afe_hdmi_routes,
+	.num_dapm_routes = ARRAY_SIZE(mtk_afe_hdmi_routes),
+};
+
+static const char *aud_clks[MTK_CLK_NUM] = {
+	[MTK_CLK_INFRASYS_AUD] = "infra_sys_audio_clk",
+	[MTK_CLK_TOP_PDN_AUD] = "top_pdn_audio",
+	[MTK_CLK_TOP_PDN_AUD_BUS] = "top_pdn_aud_intbus",
+	[MTK_CLK_I2S0_M] =  "i2s0_m",
+	[MTK_CLK_I2S1_M] =  "i2s1_m",
+	[MTK_CLK_I2S2_M] =  "i2s2_m",
+	[MTK_CLK_I2S3_M] =  "i2s3_m",
+	[MTK_CLK_I2S3_B] =  "i2s3_b",
+	[MTK_CLK_BCK0] =  "bck0",
+	[MTK_CLK_BCK1] =  "bck1",
+};
+
+static const struct mtk_afe_memif_data memif_data[MTK_AFE_MEMIF_NUM] = {
+	{
+		.name = "DL1",
+		.id = MTK_AFE_MEMIF_DL1,
+		.reg_ofs_base = AFE_DL1_BASE,
+		.reg_ofs_cur = AFE_DL1_CUR,
+		.fs_shift = 0,
+		.mono_shift = 21,
+		.enable_shift = 1,
+		.irq_reg_cnt = AFE_IRQ_CNT1,
+		.irq_cnt_shift = 0,
+		.irq_en_shift = 0,
+		.irq_fs_shift = 4,
+		.irq_clr_shift = 0,
+	}, {
+		.name = "DL2",
+		.id = MTK_AFE_MEMIF_DL2,
+		.reg_ofs_base = AFE_DL2_BASE,
+		.reg_ofs_cur = AFE_DL2_CUR,
+		.fs_shift = 4,
+		.mono_shift = 22,
+		.enable_shift = 2,
+		.irq_reg_cnt = AFE_IRQ_CNT1,
+		.irq_cnt_shift = 20,
+		.irq_en_shift = 2,
+		.irq_fs_shift = 16,
+		.irq_clr_shift = 2,
+	}, {
+		.name = "VUL",
+		.id = MTK_AFE_MEMIF_VUL,
+		.reg_ofs_base = AFE_VUL_BASE,
+		.reg_ofs_cur = AFE_VUL_CUR,
+		.fs_shift = 16,
+		.mono_shift = 27,
+		.enable_shift = 3,
+		.irq_reg_cnt = AFE_IRQ_CNT2,
+		.irq_cnt_shift = 0,
+		.irq_en_shift = 1,
+		.irq_fs_shift = 8,
+		.irq_clr_shift = 1,
+	}, {
+		.name = "DAI",
+		.id = MTK_AFE_MEMIF_DAI,
+		.reg_ofs_base = AFE_DAI_BASE,
+		.reg_ofs_cur = AFE_DAI_CUR,
+		.fs_shift = 24,
+		.mono_shift = -1,
+		.enable_shift = 4,
+		.irq_reg_cnt = AFE_IRQ_CNT2,
+		.irq_cnt_shift = 20,
+		.irq_en_shift = 3,
+		.irq_fs_shift = 20,
+		.irq_clr_shift = 3,
+	}, {
+		.name = "AWB",
+		.id = MTK_AFE_MEMIF_AWB,
+		.reg_ofs_base = AFE_AWB_BASE,
+		.reg_ofs_cur = AFE_AWB_CUR,
+		.fs_shift = 12,
+		.mono_shift = 24,
+		.enable_shift = 6,
+		.irq_reg_cnt = AFE_IRQ_CNT7,
+		.irq_cnt_shift = 0,
+		.irq_en_shift = 14,
+		.irq_fs_shift = 24,
+		.irq_clr_shift = 6,
+	}, {
+		.name = "MOD_DAI",
+		.id = MTK_AFE_MEMIF_MOD_DAI,
+		.reg_ofs_base = AFE_MOD_PCM_BASE,
+		.reg_ofs_cur = AFE_MOD_PCM_CUR,
+		.fs_shift = 30,
+		.mono_shift = 30,
+		.enable_shift = 7,
+		.irq_reg_cnt = AFE_IRQ_CNT2,
+		.irq_cnt_shift = 20,
+		.irq_en_shift = 3,
+		.irq_fs_shift = 20,
+		.irq_clr_shift = 3,
+	}, {
+		.name = "HDMI",
+		.id = MTK_AFE_MEMIF_HDMI,
+		.reg_ofs_base = AFE_HDMI_OUT_BASE,
+		.reg_ofs_cur = AFE_HDMI_OUT_CUR,
+		.fs_shift = -1,
+		.mono_shift = -1,
+		.enable_shift = -1,
+		.irq_reg_cnt = AFE_IRQ_CNT5,
+		.irq_cnt_shift = 0,
+		.irq_en_shift = 12,
+		.irq_fs_shift = -1,
+		.irq_clr_shift = 4,
+	},
+};
+
+static const struct regmap_config mtk_afe_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = AFE_ADDA2_TOP_CON0,
+	.cache_type = REGCACHE_NONE,
+};
+
+static irqreturn_t mtk_afe_irq_handler(int irq, void *dev_id)
+{
+	struct mtk_afe *afe = dev_id;
+	unsigned int reg_value, hw_ptr;
+	int i, ret;
+
+	ret = regmap_read(afe->regmap, AFE_IRQ_STATUS, &reg_value);
+	if (ret) {
+		dev_err(afe->dev, "%s irq status err\n", __func__);
+		reg_value = AFE_IRQ_STATUS_BITS;
+		goto err_irq;
+	}
+
+	for (i = 0; i < MTK_AFE_MEMIF_NUM; i++) {
+		struct mtk_afe_memif *memif = &afe->memif[i];
+
+		if (!(reg_value & (1 << memif->data->irq_clr_shift)))
+			continue;
+
+		ret = regmap_read(afe->regmap, memif->data->reg_ofs_cur,
+				  &hw_ptr);
+		if (ret || hw_ptr == 0) {
+			dev_err(afe->dev, "%s hw_ptr err\n", __func__);
+			hw_ptr = memif->phys_buf_addr;
+		}
+		memif->hw_ptr = hw_ptr - memif->phys_buf_addr;
+		snd_pcm_period_elapsed(memif->substream);
+	}
+
+err_irq:
+	/* clear irq */
+	regmap_write(afe->regmap, AFE_IRQ_CLR, reg_value & AFE_IRQ_STATUS_BITS);
+
+	return IRQ_HANDLED;
+}
+
+static int mtk_afe_runtime_suspend(struct device *dev)
+{
+	struct mtk_afe *afe = dev_get_drvdata(dev);
+
+	/* disable AFE clk */
+	regmap_update_bits(afe->regmap, AUDIO_TOP_CON0,
+			   AUD_TCON0_PDN_AFE, AUD_TCON0_PDN_AFE);
+
+	clk_disable_unprepare(afe->clocks[MTK_CLK_BCK0]);
+	clk_disable_unprepare(afe->clocks[MTK_CLK_BCK1]);
+	clk_disable_unprepare(afe->clocks[MTK_CLK_TOP_PDN_AUD]);
+	clk_disable_unprepare(afe->clocks[MTK_CLK_TOP_PDN_AUD_BUS]);
+	clk_disable_unprepare(afe->clocks[MTK_CLK_INFRASYS_AUD]);
+	return 0;
+}
+
+static int mtk_afe_runtime_resume(struct device *dev)
+{
+	struct mtk_afe *afe = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_prepare_enable(afe->clocks[MTK_CLK_INFRASYS_AUD]);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(afe->clocks[MTK_CLK_TOP_PDN_AUD_BUS]);
+	if (ret)
+		goto err_infra;
+
+	ret = clk_prepare_enable(afe->clocks[MTK_CLK_TOP_PDN_AUD]);
+	if (ret)
+		goto err_top_aud_bus;
+
+	ret = clk_prepare_enable(afe->clocks[MTK_CLK_BCK0]);
+	if (ret)
+		goto err_top_aud;
+
+	ret = clk_prepare_enable(afe->clocks[MTK_CLK_BCK1]);
+	if (ret)
+		goto err_bck0;
+
+	/* enable AFE clk */
+	regmap_update_bits(afe->regmap, AUDIO_TOP_CON0, AUD_TCON0_PDN_AFE, 0);
+
+	/* set O3/O4 16bits */
+	regmap_update_bits(afe->regmap, AFE_CONN_24BIT,
+			   AFE_CONN_24BIT_O03 | AFE_CONN_24BIT_O04, 0);
+
+	/* unmask all IRQs */
+	regmap_update_bits(afe->regmap, AFE_IRQ_MCU_EN, 0xff, 0xff);
+	return 0;
+
+err_bck0:
+	clk_disable_unprepare(afe->clocks[MTK_CLK_BCK0]);
+err_top_aud:
+	clk_disable_unprepare(afe->clocks[MTK_CLK_TOP_PDN_AUD]);
+err_top_aud_bus:
+	clk_disable_unprepare(afe->clocks[MTK_CLK_TOP_PDN_AUD_BUS]);
+err_infra:
+	clk_disable_unprepare(afe->clocks[MTK_CLK_INFRASYS_AUD]);
+	return ret;
+}
+
+static int mtk_afe_init_audio_clk(struct mtk_afe *afe)
+{
+	size_t i;
+
+	for (i = 0; i < ARRAY_SIZE(aud_clks); i++) {
+		afe->clocks[i] = devm_clk_get(afe->dev, aud_clks[i]);
+		if (IS_ERR(afe->clocks[i])) {
+			dev_err(afe->dev, "%s devm_clk_get %s fail\n",
+				__func__, aud_clks[i]);
+			return PTR_ERR(afe->clocks[i]);
+		}
+	}
+	clk_set_rate(afe->clocks[MTK_CLK_BCK0], 22579200); /* 22M */
+	clk_set_rate(afe->clocks[MTK_CLK_BCK1], 24576000); /* 24M */
+	return 0;
+}
+
+static int mtk_afe_pcm_dev_probe(struct platform_device *pdev)
+{
+	int ret, i;
+	unsigned int irq_id;
+	struct mtk_afe *afe;
+	struct resource *res;
+
+	afe = devm_kzalloc(&pdev->dev, sizeof(*afe), GFP_KERNEL);
+	if (!afe)
+		return -ENOMEM;
+
+	afe->dev = &pdev->dev;
+
+	irq_id = platform_get_irq(pdev, 0);
+	if (!irq_id) {
+		dev_err(afe->dev, "np %s no irq\n", afe->dev->of_node->name);
+		return -ENXIO;
+	}
+	ret = devm_request_irq(afe->dev, irq_id, mtk_afe_irq_handler,
+			       0, "Afe_ISR_Handle", (void *)afe);
+	if (ret) {
+		dev_err(afe->dev, "could not request_irq\n");
+		return ret;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	afe->base_addr = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(afe->base_addr))
+		return PTR_ERR(afe->base_addr);
+
+	afe->regmap = devm_regmap_init_mmio(&pdev->dev, afe->base_addr,
+		&mtk_afe_regmap_config);
+	if (IS_ERR(afe->regmap))
+		return PTR_ERR(afe->regmap);
+
+	/* initial audio related clock */
+	ret = mtk_afe_init_audio_clk(afe);
+	if (ret) {
+		dev_err(afe->dev, "mtk_afe_init_audio_clk fail\n");
+		return ret;
+	}
+
+	for (i = 0; i < MTK_AFE_MEMIF_NUM; i++)
+		afe->memif[i].data = &memif_data[i];
+
+	platform_set_drvdata(pdev, afe);
+
+	pm_runtime_enable(&pdev->dev);
+	if (!pm_runtime_enabled(&pdev->dev)) {
+		ret = mtk_afe_runtime_resume(&pdev->dev);
+		if (ret)
+			goto err_pm_disable;
+	}
+
+	ret = snd_soc_register_platform(&pdev->dev, &mtk_afe_pcm_platform);
+	if (ret)
+		goto err_pm_disable;
+
+	ret = snd_soc_register_component(&pdev->dev,
+					 &mtk_afe_pcm_dai_component,
+					 mtk_afe_pcm_dais,
+					 ARRAY_SIZE(mtk_afe_pcm_dais));
+	if (ret)
+		goto err_platform;
+
+	ret = snd_soc_register_component(&pdev->dev,
+					 &mtk_afe_hdmi_dai_component,
+					 mtk_afe_hdmi_dais,
+					 ARRAY_SIZE(mtk_afe_hdmi_dais));
+	if (ret)
+		goto err_comp;
+
+	dev_info(&pdev->dev, "MTK AFE driver initialized.\n");
+	return 0;
+
+err_comp:
+	snd_soc_unregister_component(&pdev->dev);
+err_platform:
+	snd_soc_unregister_platform(&pdev->dev);
+err_pm_disable:
+	pm_runtime_disable(&pdev->dev);
+	return ret;
+}
+
+static int mtk_afe_pcm_dev_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	if (!pm_runtime_status_suspended(&pdev->dev))
+		mtk_afe_runtime_suspend(&pdev->dev);
+	snd_soc_unregister_component(&pdev->dev);
+	snd_soc_unregister_platform(&pdev->dev);
+	return 0;
+}
+
+static const struct of_device_id mtk_afe_pcm_dt_match[] = {
+	{ .compatible = "mediatek,mt8173-afe-pcm", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, mtk_afe_pcm_dt_match);
+
+static const struct dev_pm_ops mtk_afe_pm_ops = {
+	SET_RUNTIME_PM_OPS(mtk_afe_runtime_suspend, mtk_afe_runtime_resume,
+			   NULL)
+};
+
+static struct platform_driver mtk_afe_pcm_driver = {
+	.driver = {
+		   .name = "mtk-afe-pcm",
+		   .of_match_table = mtk_afe_pcm_dt_match,
+		   .pm = &mtk_afe_pm_ops,
+	},
+	.probe = mtk_afe_pcm_dev_probe,
+	.remove = mtk_afe_pcm_dev_remove,
+};
+
+module_platform_driver(mtk_afe_pcm_driver);
+
+MODULE_DESCRIPTION("Mediatek ALSA SoC AFE platform driver");
+MODULE_AUTHOR("Koro Chen <koro.chen@mediatek.com>");
+MODULE_LICENSE("GPL v2");