1 files changed, 373 insertions, 72 deletions

diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index 315a3d39bc09..e9a051a50ab2 100644
--- a/sound/soc/codecs/rt5677.c
+++ b/sound/soc/codecs/rt5677.c
@@ -38,6 +38,10 @@
 
 #define RT5677_DEVICE_ID 0x6327
 
+/* Register controlling boot vector */
+#define RT5677_DSP_BOOT_VECTOR		0x1801f090
+#define RT5677_MODEL_ADDR		0x5FFC9800
+
 #define RT5677_PR_RANGE_BASE (0xff + 1)
 #define RT5677_PR_SPACING 0x100
 
@@ -298,6 +302,7 @@ static bool rt5677_volatile_register(struct device *dev, unsigned int reg)
 	case RT5677_I2C_MASTER_CTRL7:
 	case RT5677_I2C_MASTER_CTRL8:
 	case RT5677_HAP_GENE_CTRL2:
+	case RT5677_PWR_ANLG2: /* Modified by DSP firmware */
 	case RT5677_PWR_DSP_ST:
 	case RT5677_PRIV_DATA:
 	case RT5677_ASRC_22:
@@ -308,6 +313,8 @@ static bool rt5677_volatile_register(struct device *dev, unsigned int reg)
 	case RT5677_IRQ_CTRL1:
 	case RT5677_IRQ_CTRL2:
 	case RT5677_GPIO_ST:
+	case RT5677_GPIO_CTRL1: /* Modified by DSP firmware */
+	case RT5677_GPIO_CTRL2: /* Modified by DSP firmware */
 	case RT5677_DSP_INB1_SRC_CTRL4:
 	case RT5677_DSP_INB2_SRC_CTRL4:
 	case RT5677_DSP_INB3_SRC_CTRL4:
@@ -686,10 +693,8 @@ static int rt5677_dsp_mode_i2c_read(
 	return ret;
 }
 
-static void rt5677_set_dsp_mode(struct snd_soc_component *component, bool on)
+static void rt5677_set_dsp_mode(struct rt5677_priv *rt5677, bool on)
 {
-	struct rt5677_priv *rt5677 = snd_soc_component_get_drvdata(component);
-
 	if (on) {
 		regmap_update_bits(rt5677->regmap, RT5677_PWR_DSP1,
 			RT5677_PWR_DSP, RT5677_PWR_DSP);
@@ -701,86 +706,259 @@ static void rt5677_set_dsp_mode(struct snd_soc_component *component, bool on)
 	}
 }
 
+static unsigned int rt5677_set_vad_source(struct rt5677_priv *rt5677)
+{
+	struct snd_soc_dapm_context *dapm =
+			snd_soc_component_get_dapm(rt5677->component);
+	/* Force dapm to sync before we enable the
+	 * DSP to prevent write corruption
+	 */
+	snd_soc_dapm_sync(dapm);
+
+	/* DMIC1 power = enabled
+	 * DMIC CLK = 256 * fs / 12
+	 */
+	regmap_update_bits(rt5677->regmap, RT5677_DMIC_CTRL1,
+		RT5677_DMIC_CLK_MASK, 5 << RT5677_DMIC_CLK_SFT);
+
+	/* I2S pre divide 2 = /6 (clk_sys2) */
+	regmap_update_bits(rt5677->regmap, RT5677_CLK_TREE_CTRL1,
+		RT5677_I2S_PD2_MASK, RT5677_I2S_PD2_6);
+
+	/* DSP Clock = MCLK1 (bypassed PLL2) */
+	regmap_write(rt5677->regmap, RT5677_GLB_CLK2,
+		RT5677_DSP_CLK_SRC_BYPASS);
+
+	/* SAD Threshold1 */
+	regmap_write(rt5677->regmap, RT5677_VAD_CTRL2, 0x013f);
+	/* SAD Threshold2 */
+	regmap_write(rt5677->regmap, RT5677_VAD_CTRL3, 0x0ae5);
+	/* SAD Sample Rate Converter = Up 6 (8K to 48K)
+	 * SAD Output Sample Rate = Same as I2S
+	 * SAD Threshold3
+	 */
+	regmap_update_bits(rt5677->regmap, RT5677_VAD_CTRL4,
+		RT5677_VAD_OUT_SRC_RATE_MASK | RT5677_VAD_OUT_SRC_MASK |
+		RT5677_VAD_LV_DIFF_MASK, 0x7f << RT5677_VAD_LV_DIFF_SFT);
+	/* Minimum frame level within a pre-determined duration = 32 frames
+	 * Bypass ADPCM Encoder/Decoder = Bypass ADPCM
+	 * Automatic Push Data to SAD Buffer Once SAD Flag is triggered = enable
+	 * SAD Buffer Over-Writing = enable
+	 * SAD Buffer Pop Mode Control = disable
+	 * SAD Buffer Push Mode Control = enable
+	 * SAD Detector Control = enable
+	 * SAD Function Control = enable
+	 * SAD Function Reset = normal
+	 */
+	regmap_write(rt5677->regmap, RT5677_VAD_CTRL1,
+		RT5677_VAD_FUNC_RESET | RT5677_VAD_FUNC_ENABLE |
+		RT5677_VAD_DET_ENABLE | RT5677_VAD_BUF_PUSH |
+		RT5677_VAD_BUF_OW | RT5677_VAD_FG2ENC |
+		RT5677_VAD_ADPCM_BYPASS | 1 << RT5677_VAD_MIN_DUR_SFT);
+
+	/* VAD/SAD is not routed to the IRQ output (i.e. MX-BE[14] = 0), but it
+	 * is routed to DSP_IRQ_0, so DSP firmware may use it to sleep and save
+	 * power. See ALC5677 datasheet section 9.17 "GPIO, Interrupt and Jack
+	 * Detection" for more info.
+	 */
+
+	/* Private register, no doc */
+	regmap_update_bits(rt5677->regmap, RT5677_PR_BASE + RT5677_BIAS_CUR4,
+		0x0f00, 0x0100);
+
+	/* LDO2 output = 1.2V
+	 * LDO1 output = 1.2V (LDO_IN = 1.8V)
+	 */
+	regmap_update_bits(rt5677->regmap, RT5677_PWR_ANLG1,
+		RT5677_LDO1_SEL_MASK | RT5677_LDO2_SEL_MASK,
+		5 << RT5677_LDO1_SEL_SFT | 5 << RT5677_LDO2_SEL_SFT);
+
+	/* Codec core power =  power on
+	 * LDO1 power = power on
+	 */
+	regmap_update_bits(rt5677->regmap, RT5677_PWR_ANLG2,
+		RT5677_PWR_CORE | RT5677_PWR_LDO1,
+		RT5677_PWR_CORE | RT5677_PWR_LDO1);
+
+	/* Isolation for DCVDD4 = normal (set during probe)
+	 * Isolation for DCVDD2 = normal (set during probe)
+	 * Isolation for DSP = normal
+	 * Isolation for Band 0~7 = disable
+	 * Isolation for InBound 4~10 and OutBound 4~10 = disable
+	 */
+	regmap_write(rt5677->regmap, RT5677_PWR_DSP2,
+		RT5677_PWR_CORE_ISO | RT5677_PWR_DSP_ISO |
+		RT5677_PWR_SR7_ISO | RT5677_PWR_SR6_ISO |
+		RT5677_PWR_SR5_ISO | RT5677_PWR_SR4_ISO |
+		RT5677_PWR_SR3_ISO | RT5677_PWR_SR2_ISO |
+		RT5677_PWR_SR1_ISO | RT5677_PWR_SR0_ISO |
+		RT5677_PWR_MLT_ISO);
+
+	/* System Band 0~7 = power on
+	 * InBound 4~10 and OutBound 4~10 = power on
+	 * DSP = power on
+	 * DSP CPU = stop (will be set to "run" after firmware loaded)
+	 */
+	regmap_write(rt5677->regmap, RT5677_PWR_DSP1,
+		RT5677_PWR_SR7 | RT5677_PWR_SR6 |
+		RT5677_PWR_SR5 | RT5677_PWR_SR4 |
+		RT5677_PWR_SR3 | RT5677_PWR_SR2 |
+		RT5677_PWR_SR1 | RT5677_PWR_SR0 |
+		RT5677_PWR_MLT | RT5677_PWR_DSP |
+		RT5677_PWR_DSP_CPU);
+
+	return 0;
+}
+
+static int rt5677_parse_and_load_dsp(struct rt5677_priv *rt5677, const u8 *buf,
+		unsigned int len)
+{
+	struct snd_soc_component *component = rt5677->component;
+	Elf32_Ehdr *elf_hdr;
+	Elf32_Phdr *pr_hdr;
+	Elf32_Half i;
+	int ret = 0;
+
+	if (!buf || (len < sizeof(Elf32_Ehdr)))
+		return -ENOMEM;
+
+	elf_hdr = (Elf32_Ehdr *)buf;
+#ifndef EM_XTENSA
+#define EM_XTENSA	94
+#endif
+	if (strncmp(elf_hdr->e_ident, ELFMAG, sizeof(ELFMAG) - 1))
+		dev_err(component->dev, "Wrong ELF header prefix\n");
+	if (elf_hdr->e_ehsize != sizeof(Elf32_Ehdr))
+		dev_err(component->dev, "Wrong Elf header size\n");
+	if (elf_hdr->e_machine != EM_XTENSA)
+		dev_err(component->dev, "Wrong DSP code file\n");
+
+	if (len < elf_hdr->e_phoff)
+		return -ENOMEM;
+	pr_hdr = (Elf32_Phdr *)(buf + elf_hdr->e_phoff);
+	for (i = 0; i < elf_hdr->e_phnum; i++) {
+		/* TODO: handle p_memsz != p_filesz */
+		if (pr_hdr->p_paddr && pr_hdr->p_filesz) {
+			dev_info(component->dev, "Load 0x%x bytes to 0x%x\n",
+					pr_hdr->p_filesz, pr_hdr->p_paddr);
+
+			ret = rt5677_spi_write(pr_hdr->p_paddr,
+					buf + pr_hdr->p_offset,
+					pr_hdr->p_filesz);
+			if (ret)
+				dev_err(component->dev, "Load firmware failed %d\n",
+						ret);
+		}
+		pr_hdr++;
+	}
+	return ret;
+}
+
+static int rt5677_load_dsp_from_file(struct rt5677_priv *rt5677)
+{
+	const struct firmware *fwp;
+	struct device *dev = rt5677->component->dev;
+	int ret = 0;
+
+	/* Load dsp firmware from rt5677_elf_vad file */
+	ret = request_firmware(&fwp, "rt5677_elf_vad", dev);
+	if (ret) {
+		dev_err(dev, "Request rt5677_elf_vad failed %d\n", ret);
+		return ret;
+	}
+	dev_info(dev, "Requested rt5677_elf_vad (%zu)\n", fwp->size);
+
+	ret = rt5677_parse_and_load_dsp(rt5677, fwp->data, fwp->size);
+	release_firmware(fwp);
+	return ret;
+}
+
 static int rt5677_set_dsp_vad(struct snd_soc_component *component, bool on)
 {
 	struct rt5677_priv *rt5677 = snd_soc_component_get_drvdata(component);
-	static bool activity;
-	int ret;
+	rt5677->dsp_vad_en_request = on;
+	rt5677->dsp_vad_en = on;
 
 	if (!IS_ENABLED(CONFIG_SND_SOC_RT5677_SPI))
 		return -ENXIO;
 
-	if (on && !activity) {
+	schedule_delayed_work(&rt5677->dsp_work, 0);
+	return 0;
+}
+
+static void rt5677_dsp_work(struct work_struct *work)
+{
+	struct rt5677_priv *rt5677 =
+		container_of(work, struct rt5677_priv, dsp_work.work);
+	static bool activity;
+	bool enable = rt5677->dsp_vad_en;
+	int i, val;
+
+
+	dev_info(rt5677->component->dev, "DSP VAD: enable=%d, activity=%d\n",
+			enable, activity);
+
+	if (enable && !activity) {
 		activity = true;
 
-		regcache_cache_only(rt5677->regmap, false);
-		regcache_cache_bypass(rt5677->regmap, true);
+		/* Before a hotword is detected, GPIO1 pin is configured as IRQ
+		 * output so that jack detect works. When a hotword is detected,
+		 * the DSP firmware configures the GPIO1 pin as GPIO1 and
+		 * drives a 1. rt5677_irq() is called after a rising edge on
+		 * the GPIO1 pin, due to either jack detect event or hotword
+		 * event, or both. All possible events are checked and handled
+		 * in rt5677_irq() where GPIO1 pin is configured back to IRQ
+		 * output if a hotword is detected.
+		 */
 
-		regmap_update_bits(rt5677->regmap, RT5677_DIG_MISC, 0x1, 0x1);
-		regmap_update_bits(rt5677->regmap,
-			RT5677_PR_BASE + RT5677_BIAS_CUR4, 0x0f00, 0x0f00);
-		regmap_update_bits(rt5677->regmap, RT5677_PWR_ANLG1,
-			RT5677_LDO1_SEL_MASK, 0x0);
-		regmap_update_bits(rt5677->regmap, RT5677_PWR_ANLG2,
-			RT5677_PWR_LDO1, RT5677_PWR_LDO1);
-		switch (rt5677->type) {
-		case RT5677:
-			regmap_update_bits(rt5677->regmap, RT5677_GLB_CLK1,
-				RT5677_MCLK_SRC_MASK, RT5677_MCLK2_SRC);
-			regmap_update_bits(rt5677->regmap, RT5677_GLB_CLK2,
-				RT5677_PLL2_PR_SRC_MASK |
-				RT5677_DSP_CLK_SRC_MASK,
-				RT5677_PLL2_PR_SRC_MCLK2 |
-				RT5677_DSP_CLK_SRC_BYPASS);
-			break;
-		case RT5676:
-			regmap_update_bits(rt5677->regmap, RT5677_GLB_CLK2,
-				RT5677_DSP_CLK_SRC_MASK,
-				RT5677_DSP_CLK_SRC_BYPASS);
-			break;
-		default:
-			break;
+		rt5677_set_vad_source(rt5677);
+		rt5677_set_dsp_mode(rt5677, true);
+
+#define RT5677_BOOT_RETRY 20
+		for (i = 0; i < RT5677_BOOT_RETRY; i++) {
+			regmap_read(rt5677->regmap, RT5677_PWR_DSP_ST, &val);
+			if (val == 0x3ff)
+				break;
+			udelay(500);
 		}
-		regmap_write(rt5677->regmap, RT5677_PWR_DSP2, 0x07ff);
-		regmap_write(rt5677->regmap, RT5677_PWR_DSP1, 0x07fd);
-		rt5677_set_dsp_mode(component, true);
-
-		ret = request_firmware(&rt5677->fw1, RT5677_FIRMWARE1,
-			component->dev);
-		if (ret == 0) {
-			rt5677_spi_write_firmware(0x50000000, rt5677->fw1);
-			release_firmware(rt5677->fw1);
+		if (i == RT5677_BOOT_RETRY && val != 0x3ff) {
+			dev_err(rt5677->component->dev, "DSP Boot Timed Out!");
+			return;
 		}
 
-		ret = request_firmware(&rt5677->fw2, RT5677_FIRMWARE2,
-			component->dev);
-		if (ret == 0) {
-			rt5677_spi_write_firmware(0x60000000, rt5677->fw2);
-			release_firmware(rt5677->fw2);
-		}
+		/* Boot the firmware from IRAM instead of SRAM0. */
+		rt5677_dsp_mode_i2c_write_addr(rt5677, RT5677_DSP_BOOT_VECTOR,
+			0x0009, 0x0003);
+		rt5677_dsp_mode_i2c_write_addr(rt5677, RT5677_DSP_BOOT_VECTOR,
+			0x0019, 0x0003);
+		rt5677_dsp_mode_i2c_write_addr(rt5677, RT5677_DSP_BOOT_VECTOR,
+			0x0009, 0x0003);
 
-		regmap_update_bits(rt5677->regmap, RT5677_PWR_DSP1, 0x1, 0x0);
+		rt5677_load_dsp_from_file(rt5677);
 
-		regcache_cache_bypass(rt5677->regmap, false);
-		regcache_cache_only(rt5677->regmap, true);
-	} else if (!on && activity) {
+		/* Set DSP CPU to Run */
+		regmap_update_bits(rt5677->regmap, RT5677_PWR_DSP1,
+			RT5677_PWR_DSP_CPU, 0x0);
+	} else if (!enable && activity) {
 		activity = false;
 
-		regcache_cache_only(rt5677->regmap, false);
-		regcache_cache_bypass(rt5677->regmap, true);
+		/* Don't turn off the DSP while handling irqs */
+		mutex_lock(&rt5677->irq_lock);
+		/* Set DSP CPU to Stop */
+		regmap_update_bits(rt5677->regmap, RT5677_PWR_DSP1,
+			RT5677_PWR_DSP_CPU, RT5677_PWR_DSP_CPU);
 
-		regmap_update_bits(rt5677->regmap, RT5677_PWR_DSP1, 0x1, 0x1);
-		rt5677_set_dsp_mode(component, false);
-		regmap_write(rt5677->regmap, RT5677_PWR_DSP1, 0x0001);
+		rt5677_set_dsp_mode(rt5677, false);
 
-		regmap_write(rt5677->regmap, RT5677_RESET, 0x10ec);
+		/* Disable and clear VAD interrupt */
+		regmap_write(rt5677->regmap, RT5677_VAD_CTRL1, 0x2184);
 
-		regcache_cache_bypass(rt5677->regmap, false);
-		regcache_mark_dirty(rt5677->regmap);
-		regcache_sync(rt5677->regmap);
-	}
+		/* Set GPIO1 pin back to be IRQ output for jack detect */
+		regmap_update_bits(rt5677->regmap, RT5677_GPIO_CTRL1,
+			RT5677_GPIO1_PIN_MASK, RT5677_GPIO1_PIN_IRQ);
 
-	return 0;
+		mutex_unlock(&rt5677->irq_lock);
+	}
 }
 
 static const DECLARE_TLV_DB_SCALE(dac_vol_tlv, -6525, 75, 0);
@@ -805,7 +983,7 @@ static int rt5677_dsp_vad_get(struct snd_kcontrol *kcontrol,
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 	struct rt5677_priv *rt5677 = snd_soc_component_get_drvdata(component);
 
-	ucontrol->value.integer.value[0] = rt5677->dsp_vad_en;
+	ucontrol->value.integer.value[0] = rt5677->dsp_vad_en_request;
 
 	return 0;
 }
@@ -814,12 +992,8 @@ static int rt5677_dsp_vad_put(struct snd_kcontrol *kcontrol,
 		struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
-	struct rt5677_priv *rt5677 = snd_soc_component_get_drvdata(component);
-
-	rt5677->dsp_vad_en = !!ucontrol->value.integer.value[0];
 
-	if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)
-		rt5677_set_dsp_vad(component, rt5677->dsp_vad_en);
+	rt5677_set_dsp_vad(component, !!ucontrol->value.integer.value[0]);
 
 	return 0;
 }
@@ -3010,6 +3184,7 @@ static const struct snd_soc_dapm_widget rt5677_dapm_widgets[] = {
 	SND_SOC_DAPM_AIF_OUT("AIF4TX", "AIF4 Capture", 0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("SLBRX", "SLIMBus Playback", 0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("SLBTX", "SLIMBus Capture", 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("DSPTX", "DSP Buffer", 0, SND_SOC_NOPM, 0, 0),
 
 	/* Sidetone Mux */
 	SND_SOC_DAPM_MUX("Sidetone Mux", SND_SOC_NOPM, 0, 0,
@@ -3544,11 +3719,24 @@ static const struct snd_soc_dapm_route rt5677_dapm_routes[] = {
 	{ "SLBTX", NULL, "SLB ADC3 Mux" },
 	{ "SLBTX", NULL, "SLB ADC4 Mux" },
 
+	{ "DSPTX", NULL, "IB01 Bypass Mux" },
+
 	{ "IB01 Mux", "IF1 DAC 01", "IF1 DAC01" },
 	{ "IB01 Mux", "IF2 DAC 01", "IF2 DAC01" },
 	{ "IB01 Mux", "SLB DAC 01", "SLB DAC01" },
 	{ "IB01 Mux", "STO1 ADC MIX", "Stereo1 ADC MIX" },
-	{ "IB01 Mux", "VAD ADC/DAC1 FS", "DAC1 FS" },
+	/* The IB01 Mux controls the source for InBound0 and InBound1.
+	 * When the mux option "VAD ADC/DAC1 FS" is selected, "VAD ADC" goes to
+	 * InBound0 and "DAC1 FS" goes to InBound1. "VAD ADC" is used for
+	 * hotwording. "DAC1 FS" is not used currently.
+	 *
+	 * Creating a common widget node for "VAD ADC" + "DAC1 FS" and
+	 * connecting the common widget to IB01 Mux causes the issue where
+	 * there is an active path going from system playback -> "DAC1 FS" ->
+	 * IB01 Mux -> DSP Buffer -> hotword stream. This wrong path confuses
+	 * DAPM. Therefore "DAC1 FS" is ignored for now.
+	 */
+	{ "IB01 Mux", "VAD ADC/DAC1 FS", "VAD ADC Mux" },
 
 	{ "IB01 Bypass Mux", "Bypass", "IB01 Mux" },
 	{ "IB01 Bypass Mux", "Pass SRC", "IB01 Mux" },
@@ -4457,14 +4645,15 @@ static int rt5677_set_bias_level(struct snd_soc_component *component,
 			enum snd_soc_bias_level level)
 {
 	struct rt5677_priv *rt5677 = snd_soc_component_get_drvdata(component);
+	enum snd_soc_bias_level prev_bias =
+		snd_soc_component_get_bias_level(component);
 
 	switch (level) {
 	case SND_SOC_BIAS_ON:
 		break;
 
 	case SND_SOC_BIAS_PREPARE:
-		if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_STANDBY) {
-			rt5677_set_dsp_vad(component, false);
+		if (prev_bias == SND_SOC_BIAS_STANDBY) {
 
 			regmap_update_bits(rt5677->regmap, RT5677_PWR_ANLG1,
 				RT5677_LDO1_SEL_MASK | RT5677_LDO2_SEL_MASK,
@@ -4488,9 +4677,25 @@ static int rt5677_set_bias_level(struct snd_soc_component *component,
 		break;
 
 	case SND_SOC_BIAS_STANDBY:
+		if (prev_bias == SND_SOC_BIAS_OFF &&
+				rt5677->dsp_vad_en_request) {
+			/* Re-enable the DSP if it was turned off at suspend */
+			rt5677->dsp_vad_en = true;
+			/* The delay is to wait for MCLK */
+			schedule_delayed_work(&rt5677->dsp_work,
+					msecs_to_jiffies(1000));
+		}
 		break;
 
 	case SND_SOC_BIAS_OFF:
+		flush_delayed_work(&rt5677->dsp_work);
+		if (rt5677->is_dsp_mode) {
+			/* Turn off the DSP before suspend */
+			rt5677->dsp_vad_en = false;
+			schedule_delayed_work(&rt5677->dsp_work, 0);
+			flush_delayed_work(&rt5677->dsp_work);
+		}
+
 		regmap_update_bits(rt5677->regmap, RT5677_DIG_MISC, 0x1, 0x0);
 		regmap_write(rt5677->regmap, RT5677_PWR_DIG1, 0x0000);
 		regmap_write(rt5677->regmap, RT5677_PWR_ANLG1,
@@ -4740,6 +4945,8 @@ static void rt5677_remove(struct snd_soc_component *component)
 {
 	struct rt5677_priv *rt5677 = snd_soc_component_get_drvdata(component);
 
+	cancel_delayed_work_sync(&rt5677->dsp_work);
+
 	regmap_write(rt5677->regmap, RT5677_RESET, 0x10ec);
 	gpiod_set_value_cansleep(rt5677->pow_ldo2, 0);
 	gpiod_set_value_cansleep(rt5677->reset_pin, 1);
@@ -4750,6 +4957,11 @@ static int rt5677_suspend(struct snd_soc_component *component)
 {
 	struct rt5677_priv *rt5677 = snd_soc_component_get_drvdata(component);
 
+	if (rt5677->irq) {
+		cancel_delayed_work_sync(&rt5677->resume_irq_check);
+		disable_irq(rt5677->irq);
+	}
+
 	if (!rt5677->dsp_vad_en) {
 		regcache_cache_only(rt5677->regmap, true);
 		regcache_mark_dirty(rt5677->regmap);
@@ -4778,6 +4990,11 @@ static int rt5677_resume(struct snd_soc_component *component)
 		regcache_sync(rt5677->regmap);
 	}
 
+	if (rt5677->irq) {
+		enable_irq(rt5677->irq);
+		schedule_delayed_work(&rt5677->resume_irq_check, 0);
+	}
+
 	return 0;
 }
 #else
@@ -4842,6 +5059,11 @@ static const struct snd_soc_dai_ops rt5677_aif_dai_ops = {
 	.set_tdm_slot = rt5677_set_tdm_slot,
 };
 
+static const struct snd_soc_dai_ops rt5677_dsp_dai_ops = {
+	.set_sysclk = rt5677_set_dai_sysclk,
+	.set_pll = rt5677_set_dai_pll,
+};
+
 static struct snd_soc_dai_driver rt5677_dai[] = {
 	{
 		.name = "rt5677-aif1",
@@ -4938,6 +5160,18 @@ static struct snd_soc_dai_driver rt5677_dai[] = {
 		},
 		.ops = &rt5677_aif_dai_ops,
 	},
+	{
+		.name = "rt5677-dspbuffer",
+		.id = RT5677_DSPBUFF,
+		.capture = {
+			.stream_name = "DSP Buffer",
+			.channels_min = 1,
+			.channels_max = 1,
+			.rates = SNDRV_PCM_RATE_16000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+		.ops = &rt5677_dsp_dai_ops,
+	},
 };
 
 static const struct snd_soc_component_driver soc_component_dev_rt5677 = {
@@ -5073,6 +5307,28 @@ static const struct rt5677_irq_desc rt5677_irq_descs[] = {
 	},
 };
 
+static bool rt5677_check_hotword(struct rt5677_priv *rt5677)
+{
+	int reg_gpio;
+
+	if (!rt5677->is_dsp_mode)
+		return false;
+
+	if (regmap_read(rt5677->regmap, RT5677_GPIO_CTRL1, &reg_gpio))
+		return false;
+
+	/* Firmware sets GPIO1 pin to be GPIO1 after hotword is detected */
+	if ((reg_gpio & RT5677_GPIO1_PIN_MASK) == RT5677_GPIO1_PIN_IRQ)
+		return false;
+
+	/* Set GPIO1 pin back to be IRQ output for jack detect */
+	regmap_update_bits(rt5677->regmap, RT5677_GPIO_CTRL1,
+			RT5677_GPIO1_PIN_MASK, RT5677_GPIO1_PIN_IRQ);
+
+	rt5677_spi_hotword_detected();
+	return true;
+}
+
 static irqreturn_t rt5677_irq(int unused, void *data)
 {
 	struct rt5677_priv *rt5677 = data;
@@ -5118,7 +5374,13 @@ static irqreturn_t rt5677_irq(int unused, void *data)
 				reg_irq ^= rt5677_irq_descs[i].polarity_mask;
 			}
 		}
-		if (!irq_fired)
+
+		/* Exit the loop only when we know for sure that GPIO1 pin
+		 * was low at some point since irq_lock was acquired. Any event
+		 * after that point creates a rising edge that triggers another
+		 * call to rt5677_irq().
+		 */
+		if (!irq_fired && !rt5677_check_hotword(rt5677))
 			goto exit;
 
 		ret = regmap_write(rt5677->regmap, RT5677_IRQ_CTRL1, reg_irq);
@@ -5129,6 +5391,7 @@ static irqreturn_t rt5677_irq(int unused, void *data)
 		}
 	}
 exit:
+	WARN_ON_ONCE(loop == 20);
 	mutex_unlock(&rt5677->irq_lock);
 	if (irq_fired)
 		return IRQ_HANDLED;
@@ -5136,6 +5399,39 @@ exit:
 		return IRQ_NONE;
 }
 
+static void rt5677_resume_irq_check(struct work_struct *work)
+{
+	int i, virq;
+	struct rt5677_priv *rt5677 =
+		container_of(work, struct rt5677_priv, resume_irq_check.work);
+
+	/* This is needed to check and clear the interrupt status register
+	 * at resume. If the headset is plugged/unplugged when the device is
+	 * fully suspended, there won't be a rising edge at resume to trigger
+	 * the interrupt. Without this, we miss the next unplug/plug event.
+	 */
+	rt5677_irq(0, rt5677);
+
+	/* Call all enabled jack detect irq handlers again. This is needed in
+	 * addition to the above check for a corner case caused by jack gpio
+	 * debounce. After codec irq is disabled at suspend, the delayed work
+	 * scheduled by soc-jack may run and read wrong jack gpio values, since
+	 * the regmap is in cache only mode. At resume, there is no irq because
+	 * rt5677_irq has already ran and cleared the irq status at suspend.
+	 * Without this explicit check, unplug the headset right after suspend
+	 * starts, then after resume the headset is still shown as plugged in.
+	 */
+	mutex_lock(&rt5677->irq_lock);
+	for (i = 0; i < RT5677_IRQ_NUM; i++) {
+		if (rt5677->irq_en & rt5677_irq_descs[i].enable_mask) {
+			virq = irq_find_mapping(rt5677->domain, i);
+			if (virq)
+				handle_nested_irq(virq);
+		}
+	}
+	mutex_unlock(&rt5677->irq_lock);
+}
+
 static void rt5677_irq_bus_lock(struct irq_data *data)
 {
 	struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data);
@@ -5211,6 +5507,7 @@ static int rt5677_init_irq(struct i2c_client *i2c)
 	}
 
 	mutex_init(&rt5677->irq_lock);
+	INIT_DELAYED_WORK(&rt5677->resume_irq_check, rt5677_resume_irq_check);
 
 	/*
 	 * Select RC as the debounce clock so that GPIO works even when
@@ -5256,6 +5553,8 @@ static int rt5677_init_irq(struct i2c_client *i2c)
 	if (ret)
 		dev_err(&i2c->dev, "Failed to request IRQ: %d\n", ret);
 
+	rt5677->irq = i2c->irq;
+
 	return ret;
 }
 
@@ -5271,6 +5570,8 @@ static int rt5677_i2c_probe(struct i2c_client *i2c)
 		return -ENOMEM;
 
 	rt5677->dev = &i2c->dev;
+	rt5677->set_dsp_vad = rt5677_set_dsp_vad;
+	INIT_DELAYED_WORK(&rt5677->dsp_work, rt5677_dsp_work);
 	i2c_set_clientdata(i2c, rt5677);
 
 	if (i2c->dev.of_node) {