[RFC PATCH 1/3] ASoC: Intel: Add Lenovo Yoga Book RT5677 machine driver

[Maurizio Casciano]

The Lenovo Yoga Book YB1-X91F/L uses the Cherry Trail SSP2 link with
an RT5677 codec and a TS3A227E headset detector. Its amplifiers and
headphone path also need board-specific GPIO sequencing.

Add a Yoga Book machine driver derived from Yauhen Kharuzhy's
GPL-2.0 cht_bsw_rt5677 implementation. Retain its copyright notice.
Allocate the card, links, codec component and notifier per device so
probing does not mutate global templates. Support SST and SOF parent
naming, MCLK/PLL setup, jack buttons, microphones and output controls.

Link: https://github.com/jekhor/yogabook-linux-kernel/commit/4e41d0ff72c1d1fd8d5c59dda247e4ca8a1da999
Signed-off-by: Maurizio Casciano <mauriziocasciano7@xxxxxxxxx>
Assisted-by: Codex:gpt-5.6-sol sparse
---
 MAINTAINERS                           |   1 +
 sound/soc/intel/boards/Kconfig        |  14 +
 sound/soc/intel/boards/Makefile       |   2 +
 sound/soc/intel/boards/cht_yogabook.c | 616 ++++++++++++++++++++++++++
 4 files changed, 633 insertions(+)
 create mode 100644 sound/soc/intel/boards/cht_yogabook.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 8014b9f8253e..83b49d9ad01c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12909,6 +12909,7 @@ R:	Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxx>
 L:	linux-sound@xxxxxxxxxxxxxxx
 S:	Supported
 F:	sound/soc/intel/
+F:	sound/soc/intel/boards/cht_yogabook.c
 
 INTEL ATOMISP2 DUMMY / POWER-MANAGEMENT DRIVER
 M:	Hans de Goede <hansg@xxxxxxxxxx>
diff --git a/sound/soc/intel/boards/Kconfig b/sound/soc/intel/boards/Kconfig
index cddbd2aa424e..fe5b1cb154e3 100644
--- a/sound/soc/intel/boards/Kconfig
+++ b/sound/soc/intel/boards/Kconfig
@@ -161,6 +161,20 @@ config SND_SOC_INTEL_CHT_BSW_RT5672_MACH
 	  Say Y or m if you have such a device. This is a recommended option.
 	  If unsure select "N".
 
+config SND_SOC_INTEL_CHT_YOGABOOK_MACH
+	tristate "Cherrytrail-based Lenovo Yoga Book tablet"
+	depends on X86_INTEL_LPSS && I2C && ACPI && SPI_MASTER
+	select SND_SOC_ACPI
+	select SND_SOC_RT5677
+	select SND_SOC_RT5677_SPI
+	select SND_SOC_TS3A227E
+	help
+	  This adds support for the RT5677 audio hardware in the Lenovo Yoga
+	  Book YB1-X91 Cherry Trail tablets.
+	  The machine driver connects the Cherry Trail audio platform to the
+	  RT5677 codec and TS3A227E headset-jack detector.
+	  Say Y or m if you have such a device.
+
 config SND_SOC_INTEL_CHT_BSW_RT5645_MACH
 	tristate "Cherrytrail & Braswell with RT5645/5650 codec"
 	depends on I2C && ACPI
diff --git a/sound/soc/intel/boards/Makefile b/sound/soc/intel/boards/Makefile
index 25a1a9066cbf..bf521aaab4e7 100644
--- a/sound/soc/intel/boards/Makefile
+++ b/sound/soc/intel/boards/Makefile
@@ -9,6 +9,7 @@ snd-soc-sst-bytcr-rt5640-y := bytcr_rt5640.o
 snd-soc-sst-bytcr-rt5651-y := bytcr_rt5651.o
 snd-soc-sst-bytcr-wm5102-y := bytcr_wm5102.o
 snd-soc-sst-cht-bsw-rt5672-y := cht_bsw_rt5672.o
+snd-soc-sst-cht-yogabook-y := cht_yogabook.o
 snd-soc-sst-cht-bsw-rt5645-y := cht_bsw_rt5645.o
 snd-soc-sst-cht-bsw-max98090_ti-y := cht_bsw_max98090_ti.o
 snd-soc-sst-cht-bsw-nau8824-y := cht_bsw_nau8824.o
@@ -41,6 +42,7 @@ obj-$(CONFIG_SND_SOC_INTEL_BYTCR_RT5640_MACH) += snd-soc-sst-bytcr-rt5640.o
 obj-$(CONFIG_SND_SOC_INTEL_BYTCR_RT5651_MACH) += snd-soc-sst-bytcr-rt5651.o
 obj-$(CONFIG_SND_SOC_INTEL_BYTCR_WM5102_MACH) += snd-soc-sst-bytcr-wm5102.o
 obj-$(CONFIG_SND_SOC_INTEL_CHT_BSW_RT5672_MACH) += snd-soc-sst-cht-bsw-rt5672.o
+obj-$(CONFIG_SND_SOC_INTEL_CHT_YOGABOOK_MACH) += snd-soc-sst-cht-yogabook.o
 obj-$(CONFIG_SND_SOC_INTEL_CHT_BSW_RT5645_MACH) += snd-soc-sst-cht-bsw-rt5645.o
 obj-$(CONFIG_SND_SOC_INTEL_CHT_BSW_MAX98090_TI_MACH) += snd-soc-sst-cht-bsw-max98090_ti.o
 obj-$(CONFIG_SND_SOC_INTEL_CHT_BSW_NAU8824_MACH) += snd-soc-sst-cht-bsw-nau8824.o
diff --git a/sound/soc/intel/boards/cht_yogabook.c b/sound/soc/intel/boards/cht_yogabook.c
new file mode 100644
index 000000000000..a4def23fb5e0
--- /dev/null
+++ b/sound/soc/intel/boards/cht_yogabook.c
@@ -0,0 +1,616 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  cht_yogabook.c - ASoC machine driver for the Lenovo Yoga Book
+ *
+ *  Copyright (C) 2019 Yauhen Kharuzhy <jekhor@xxxxxxxxx>
+ *
+ *  Based on cht_bsw_rt5672.c:
+ *  Copyright (C) 2014 Intel Corp
+ *  Author: Subhransu S. Prusty <subhransu.s.prusty@xxxxxxxxx>
+ *          Mengdong Lin <mengdong.lin@xxxxxxxxx>
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <sound/jack.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-acpi.h>
+#include "../../codecs/rt5677.h"
+#include "../../codecs/ts3a227e.h"
+#include "../atom/sst-atom-controls.h"
+
+#define RT5677_I2C	"i2c-rt5677"
+
+/* Platform clock 3 provides the codec's 19.2 MHz I2S master clock. */
+#define CHT_PLAT_CLK_3_HZ	19200000
+#define CHT_CODEC_DAI	"rt5677-aif1"
+
+struct cht_mc_private {
+	char codec_name[SND_ACPI_I2C_ID_LEN];
+	struct snd_soc_jack jack;
+	struct notifier_block jack_nb;
+	struct clk *mclk;
+	struct gpio_desc *gpio_spk_en1;
+	struct gpio_desc *gpio_spk_en2;
+	struct gpio_desc *gpio_hp_en;
+};
+
+static int platform_clock_control(struct snd_soc_dapm_widget *w,
+				  struct snd_kcontrol *k, int event)
+{
+	struct snd_soc_dapm_context *dapm = w->dapm;
+	struct snd_soc_card *card = snd_soc_dapm_to_card(dapm);
+	struct snd_soc_dai *codec_dai;
+	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
+	int ret;
+
+	dev_dbg(card->dev, "Setting platform clock\n");
+
+	codec_dai = snd_soc_card_get_codec_dai(card, CHT_CODEC_DAI);
+	if (!codec_dai) {
+		dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
+		return -EIO;
+	}
+
+	if (SND_SOC_DAPM_EVENT_ON(event)) {
+		if (ctx->mclk) {
+			ret = clk_prepare_enable(ctx->mclk);
+			if (ret < 0) {
+				dev_err(card->dev,
+					"could not configure MCLK state");
+				return ret;
+			}
+		}
+
+		/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
+		ret = snd_soc_dai_set_pll(codec_dai, 0, RT5677_PLL1_S_MCLK,
+					  CHT_PLAT_CLK_3_HZ, 48000 * 512);
+		if (ret < 0) {
+			dev_err(card->dev, "can't set codec pll: %d\n", ret);
+			goto disable_mclk;
+		}
+
+		/* set codec sysclk source to PLL */
+		ret = snd_soc_dai_set_sysclk(codec_dai, RT5677_SCLK_S_PLL1,
+					     48000 * 512, SND_SOC_CLOCK_IN);
+		if (ret < 0) {
+			dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
+			goto disable_mclk;
+		}
+	} else {
+		/*
+		 * Set codec sysclk source to its internal clock because codec
+		 * PLL will be off when idle and MCLK will also be off by ACPI
+		 * when codec is runtime suspended. Codec needs clock for jack
+		 * detection and button press.
+		 */
+		snd_soc_dai_set_sysclk(codec_dai, RT5677_SCLK_S_RCCLK,
+				       48000 * 512, SND_SOC_CLOCK_IN);
+
+		if (ctx->mclk)
+			clk_disable_unprepare(ctx->mclk);
+	}
+	return 0;
+
+disable_mclk:
+	if (ctx->mclk)
+		clk_disable_unprepare(ctx->mclk);
+	return ret;
+}
+
+static int cht_yb_hp_event(struct snd_soc_dapm_widget *w,
+			   struct snd_kcontrol *k, int event)
+{
+	struct snd_soc_dapm_context *dapm = w->dapm;
+	struct snd_soc_card *card = snd_soc_dapm_to_card(dapm);
+	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
+
+	dev_dbg(card->dev, "HP event: %s\n",
+		SND_SOC_DAPM_EVENT_ON(event) ? "ON" : "OFF");
+
+	if (SND_SOC_DAPM_EVENT_ON(event)) {
+		msleep(20);
+		gpiod_set_value_cansleep(ctx->gpio_hp_en, 1);
+		msleep(50);
+	} else {
+		gpiod_set_value_cansleep(ctx->gpio_hp_en, 0);
+	}
+
+	return 0;
+}
+
+static int cht_yb_spk_event(struct snd_soc_dapm_widget *w,
+			    struct snd_kcontrol *k, int event)
+{
+	struct snd_soc_dapm_context *dapm = w->dapm;
+	struct snd_soc_card *card = snd_soc_dapm_to_card(dapm);
+	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
+
+	dev_dbg(card->dev, "SPK event: %s\n",
+		SND_SOC_DAPM_EVENT_ON(event) ? "ON" : "OFF");
+
+	/* Replicate the speaker-enable pulse sequence from Lenovo's kernel. */
+	if (SND_SOC_DAPM_EVENT_ON(event)) {
+		gpiod_set_value_cansleep(ctx->gpio_spk_en1, 1);
+		udelay(2);
+		gpiod_set_value_cansleep(ctx->gpio_spk_en1, 0);
+		udelay(2);
+		gpiod_set_value_cansleep(ctx->gpio_spk_en1, 1);
+		udelay(2);
+		gpiod_set_value_cansleep(ctx->gpio_spk_en1, 0);
+		udelay(2);
+	}
+
+	gpiod_set_value_cansleep(ctx->gpio_spk_en1, SND_SOC_DAPM_EVENT_ON(event));
+	gpiod_set_value_cansleep(ctx->gpio_spk_en2, SND_SOC_DAPM_EVENT_ON(event));
+	msleep(50);
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone", cht_yb_hp_event),
+	SND_SOC_DAPM_MIC("Headset Mic", NULL),
+	SND_SOC_DAPM_MIC("Int Mic", NULL),
+	SND_SOC_DAPM_SPK("Speaker", cht_yb_spk_event),
+	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
+			    platform_clock_control, SND_SOC_DAPM_PRE_PMU |
+			    SND_SOC_DAPM_POST_PMD),
+};
+
+static const struct snd_soc_dapm_route cht_audio_map[] = {
+	{"IN1P", NULL, "Headset Mic"},
+	{"IN1N", NULL, "Headset Mic"},
+	{"DMIC L1", NULL, "Int Mic"},
+	{"DMIC R1", NULL, "Int Mic"},
+	{"Headphone", NULL, "LOUT1"},
+	{"Headphone", NULL, "LOUT2"},
+	{"Speaker", NULL, "LOUT1"},
+	{"Speaker", NULL, "LOUT2"},
+
+	{"AIF1 Playback", NULL, "ssp2 Tx"},
+	{"ssp2 Tx", NULL, "codec_out0"},
+	{"ssp2 Tx", NULL, "codec_out1"},
+	{"codec_in0", NULL, "ssp2 Rx"},
+	{"codec_in1", NULL, "ssp2 Rx"},
+	{"ssp2 Rx", NULL, "AIF1 Capture"},
+	{"Headphone", NULL, "Platform Clock"},
+	{"Speaker", NULL, "Platform Clock"},
+	{"Headset Mic", NULL, "Platform Clock"},
+	{"Int Mic", NULL, "Platform Clock"},
+};
+
+static const struct snd_kcontrol_new cht_mc_controls[] = {
+	SOC_DAPM_PIN_SWITCH("Headphone"),
+	SOC_DAPM_PIN_SWITCH("Headset Mic"),
+	SOC_DAPM_PIN_SWITCH("Int Mic"),
+	SOC_DAPM_PIN_SWITCH("Speaker"),
+};
+
+static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
+			      struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
+	int ret;
+
+	/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
+	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5677_PLL1_S_MCLK,
+				  CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
+	if (ret < 0) {
+		dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
+		return ret;
+	}
+
+	/* set codec sysclk source to PLL */
+	ret = snd_soc_dai_set_sysclk(codec_dai, RT5677_SCLK_S_PLL1,
+				     params_rate(params) * 512,
+				     SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
+		return ret;
+	}
+	/*
+	 * Default mode for SSP configuration is TDM 4 slot
+	 */
+	ret = snd_soc_dai_set_fmt(codec_dai,
+				  SND_SOC_DAIFMT_DSP_B |
+				  SND_SOC_DAIFMT_IB_NF |
+				  SND_SOC_DAIFMT_CBC_CFC);
+	if (ret < 0) {
+		dev_err(codec_dai->dev, "can't set format to TDM %d\n", ret);
+		return ret;
+	}
+
+	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
+	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 25);
+	if (ret < 0) {
+		dev_err(rtd->dev, "can't set codec TDM slot %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int cht_yb_jack_event(struct notifier_block *nb,
+			     unsigned long event, void *data)
+{
+	struct snd_soc_jack *jack = (struct snd_soc_jack *)data;
+	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(jack->card);
+
+	if (event & SND_JACK_MICROPHONE) {
+		snd_soc_dapm_force_enable_pin(dapm, "MICBIAS1");
+		snd_soc_dapm_sync(dapm);
+	} else {
+		snd_soc_dapm_disable_pin(dapm, "MICBIAS1");
+		snd_soc_dapm_sync(dapm);
+	}
+
+	return 0;
+}
+
+static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
+{
+	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(runtime, 0);
+	struct snd_soc_component *component = codec_dai->component;
+	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);
+	struct snd_soc_jack *jack = &ctx->jack;
+	int ret;
+
+	/*
+	 * Enable codec ASRC function for Stereo DAC/Stereo1 ADC/DMIC/I2S1.
+	 * The ASRC clock source is clk_i2s1_asrc.
+	 */
+	rt5677_sel_asrc_clk_src(component, RT5677_DA_STEREO_FILTER |
+					     RT5677_AD_STEREO1_FILTER |
+					     RT5677_I2S1_SOURCE,
+				     RT5677_CLK_SEL_I2S1_ASRC);
+	/*
+	 * Enable codec ASRC function for Mono ADC L.
+	 * The ASRC clock source is clk_sys2_asrc.
+	 */
+	rt5677_sel_asrc_clk_src(component, RT5677_AD_MONO_L_FILTER, RT5677_CLK_SEL_SYS2);
+
+	ctx->gpio_spk_en1 = devm_gpiod_get(component->dev, "speaker-enable", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->gpio_spk_en1)) {
+		dev_err(component->dev, "Can't find speaker enable GPIO\n");
+		return PTR_ERR(ctx->gpio_spk_en1);
+	}
+
+	ctx->gpio_spk_en2 = devm_gpiod_get(component->dev, "speaker-enable2", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->gpio_spk_en2)) {
+		dev_err(component->dev, "Can't find speaker enable 2 GPIO\n");
+		return PTR_ERR(ctx->gpio_spk_en2);
+	}
+
+	ctx->gpio_hp_en = devm_gpiod_get(component->dev, "headphone-enable", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->gpio_hp_en)) {
+		dev_err(component->dev, "Can't find headphone enable GPIO\n");
+		return PTR_ERR(ctx->gpio_hp_en);
+	}
+
+	snd_soc_jack_notifier_register(jack, &ctx->jack_nb);
+
+	if (ctx->mclk) {
+		/*
+		 * The firmware might enable the clock at
+		 * boot (this information may or may not
+		 * be reflected in the enable clock register).
+		 * To change the rate we must disable the clock
+		 * first to cover these cases. Due to common
+		 * clock framework restrictions that do not allow
+		 * to disable a clock that has not been enabled,
+		 * we need to enable the clock first.
+		 */
+		ret = clk_prepare_enable(ctx->mclk);
+		if (!ret)
+			clk_disable_unprepare(ctx->mclk);
+
+		ret = clk_set_rate(ctx->mclk, CHT_PLAT_CLK_3_HZ);
+
+		if (ret) {
+			dev_err(runtime->dev, "unable to set MCLK rate\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd,
+			   struct snd_pcm_hw_params *params)
+{
+	struct snd_interval *rate = hw_param_interval(params,
+			SNDRV_PCM_HW_PARAM_RATE);
+	struct snd_interval *channels = hw_param_interval(params,
+						SNDRV_PCM_HW_PARAM_CHANNELS);
+
+	/* The DSP will convert the FE rate to 48k, stereo, 24bits */
+	rate->min = 48000;
+	rate->max = 48000;
+	channels->min = 2;
+	channels->max = 2;
+
+	/*
+	 * Configure SSP2 for the 24-bit format expected by the codec. The SST
+	 * ssp2-port front end still advertises S16_LE and converts the stream.
+	 */
+	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
+
+	return 0;
+}
+
+static struct snd_soc_jack_pin cht_yb_jack_pins[] = {
+	{
+		.pin = "Headphone",
+		.mask = SND_JACK_HEADPHONE,
+	},
+	{
+		.pin = "Headset Mic",
+		.mask = SND_JACK_MICROPHONE,
+	},
+};
+
+static int cht_yb_headset_init(struct snd_soc_component *component)
+{
+	struct snd_soc_card *card = component->card;
+	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
+	struct snd_soc_jack *jack = &ctx->jack;
+	int jack_type;
+	int ret;
+
+	/*
+	 * TI supports four headset buttons:
+	 * KEY_MEDIA
+	 * KEY_VOICECOMMAND
+	 * KEY_VOLUMEUP
+	 * KEY_VOLUMEDOWN
+	 */
+	jack_type = SND_JACK_HEADPHONE | SND_JACK_MICROPHONE |
+		    SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+		    SND_JACK_BTN_2 | SND_JACK_BTN_3;
+
+	ret = snd_soc_card_jack_new_pins(card, "Headset Jack", jack_type,
+					 jack, cht_yb_jack_pins,
+					 ARRAY_SIZE(cht_yb_jack_pins));
+	if (ret) {
+		dev_err(card->dev, "Headset Jack creation failed %d\n", ret);
+		return ret;
+	}
+
+	return ts3a227e_enable_jack_detect(component, jack);
+}
+
+static int cht_aif1_startup(struct snd_pcm_substream *substream)
+{
+	return snd_pcm_hw_constraint_single(substream->runtime,
+			SNDRV_PCM_HW_PARAM_RATE, 48000);
+}
+
+static const struct snd_soc_ops cht_aif1_ops = {
+	.startup = cht_aif1_startup,
+};
+
+static const struct snd_soc_ops cht_be_ssp2_ops = {
+	.hw_params = cht_aif1_hw_params,
+};
+
+static const struct snd_soc_aux_dev cht_yb_headset_dev = {
+	.dlc = COMP_AUX("i2c-ts3a227e"),
+	.init = cht_yb_headset_init,
+};
+
+SND_SOC_DAILINK_DEF(dummy, DAILINK_COMP_ARRAY(COMP_DUMMY()));
+
+SND_SOC_DAILINK_DEF(media, DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));
+
+SND_SOC_DAILINK_DEF(deepbuffer, DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));
+
+SND_SOC_DAILINK_DEF(ssp2_port, DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port")));
+SND_SOC_DAILINK_DEF(ssp2_codec, DAILINK_COMP_ARRAY(COMP_CODEC(RT5677_I2C, CHT_CODEC_DAI)));
+
+SND_SOC_DAILINK_DEF(platform, DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));
+
+static const struct snd_soc_dai_link cht_dailink[] = {
+	/* Front End DAI links */
+	[MERR_DPCM_AUDIO] = {
+		.name = "Audio Port",
+		.stream_name = "Audio",
+		.nonatomic = true,
+		.dynamic = 1,
+		.ops = &cht_aif1_ops,
+		SND_SOC_DAILINK_REG(media, dummy, platform),
+	},
+	[MERR_DPCM_DEEP_BUFFER] = {
+		.name = "Deep-Buffer Audio Port",
+		.stream_name = "Deep-Buffer Audio",
+		.nonatomic = true,
+		.dynamic = 1,
+		.playback_only = 1,
+		.ops = &cht_aif1_ops,
+		SND_SOC_DAILINK_REG(deepbuffer, dummy, platform),
+	},
+
+	/* Back End DAI links */
+	{
+		/* SSP2 - Codec */
+		.name = "SSP2-Codec",
+		.id = 0,
+		.no_pcm = 1,
+		.nonatomic = true,
+		.init = cht_codec_init,
+		.be_hw_params_fixup = cht_codec_fixup,
+		.ops = &cht_be_ssp2_ops,
+		SND_SOC_DAILINK_REG(ssp2_port, ssp2_codec, platform),
+	},
+};
+
+/* SoC card */
+static const struct snd_soc_card snd_soc_card_cht = {
+	.owner = THIS_MODULE,
+	.num_links = ARRAY_SIZE(cht_dailink),
+	.num_aux_devs = 1,
+	.dapm_widgets = cht_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
+	.dapm_routes = cht_audio_map,
+	.num_dapm_routes = ARRAY_SIZE(cht_audio_map),
+	.controls = cht_mc_controls,
+	.num_controls = ARRAY_SIZE(cht_mc_controls),
+};
+
+static const struct acpi_gpio_params speaker_enable_gpio = { 2, 0, false };
+static const struct acpi_gpio_mapping cht_yb_gpios[] = {
+	{ "speaker-enable-gpios", &speaker_enable_gpio, 1 },
+	{ NULL }
+};
+
+#define SOF_CARD_NAME "cht yogabook"
+#define SOF_DRIVER_NAME "SOF"
+
+#define CARD_NAME "cht-yogabook"
+#define DRIVER_NAME NULL
+
+static int snd_cht_mc_probe(struct platform_device *pdev)
+{
+	struct cht_mc_private *drv;
+	struct snd_soc_acpi_mach *mach = pdev->dev.platform_data;
+	struct snd_soc_aux_dev *aux_dev;
+	struct snd_soc_dai_link_component *codecs;
+	struct snd_soc_dai_link *dai_links;
+	struct snd_soc_card *card;
+	const void *codec_template;
+	size_t codecs_size;
+	const char *platform_name;
+	struct acpi_device *adev;
+	struct device *codec_dev;
+	bool has_acpi_codec = false;
+	bool sof_parent;
+	int ret;
+	int i;
+
+	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
+	if (!drv)
+		return -ENOMEM;
+
+	card = devm_kmemdup(&pdev->dev, &snd_soc_card_cht, sizeof(*card), GFP_KERNEL);
+	if (!card)
+		return -ENOMEM;
+
+	dai_links = devm_kmemdup(&pdev->dev, cht_dailink, sizeof(cht_dailink), GFP_KERNEL);
+	if (!dai_links)
+		return -ENOMEM;
+
+	aux_dev = devm_kmemdup(&pdev->dev, &cht_yb_headset_dev,
+			       sizeof(cht_yb_headset_dev), GFP_KERNEL);
+	if (!aux_dev)
+		return -ENOMEM;
+
+	card->dai_link = dai_links;
+	card->aux_dev = aux_dev;
+	drv->jack_nb.notifier_call = cht_yb_jack_event;
+
+	strscpy(drv->codec_name, RT5677_I2C, sizeof(drv->codec_name));
+
+	/* fixup codec name based on HID if ACPI node is present */
+	adev = acpi_dev_get_first_match_dev(mach->id, NULL, -1);
+	if (adev) {
+		has_acpi_codec = true;
+		snprintf(drv->codec_name, sizeof(drv->codec_name),
+			 "i2c-%s", acpi_dev_name(adev));
+		dev_info(&pdev->dev, "real codec name: %s\n", drv->codec_name);
+
+		put_device(&adev->dev);
+		for (i = 0; i < card->num_links; i++) {
+			if (dai_links[i].codecs->name &&
+			    !strcmp(dai_links[i].codecs->name,
+				    RT5677_I2C)) {
+				codecs_size = sizeof(*codecs) * dai_links[i].num_codecs;
+				codec_template = dai_links[i].codecs;
+				codecs = devm_kmemdup(&pdev->dev, codec_template, codecs_size,
+						      GFP_KERNEL);
+				if (!codecs)
+					return -ENOMEM;
+
+				codecs->name = drv->codec_name;
+				dai_links[i].codecs = codecs;
+				break;
+			}
+		}
+	}
+
+	codec_dev = bus_find_device_by_name(&i2c_bus_type, NULL,
+					    drv->codec_name);
+	if (!codec_dev)
+		return -EPROBE_DEFER;
+
+	if (has_acpi_codec) {
+		ret = devm_acpi_dev_add_driver_gpios(codec_dev, cht_yb_gpios);
+		if (ret)
+			dev_warn(&pdev->dev, "Unable to add GPIO mapping table: %d\n",
+				 ret);
+	}
+	put_device(codec_dev);
+
+	/* Override platform name, if required. */
+	card->dev = &pdev->dev;
+	platform_name = mach->mach_params.platform;
+
+	ret = snd_soc_fixup_dai_links_platform_name(card, platform_name);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_fixup_dai_links_platform_name failed: %d\n",
+			ret);
+		return ret;
+	}
+
+	drv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3");
+	if (IS_ERR(drv->mclk)) {
+		dev_err(&pdev->dev,
+			"Failed to get MCLK from pmc_plt_clk_3: %ld\n",
+			PTR_ERR(drv->mclk));
+		return PTR_ERR(drv->mclk);
+	}
+	snd_soc_card_set_drvdata(card, drv);
+
+	sof_parent = snd_soc_acpi_sof_parent(&pdev->dev);
+
+	/* set the card and driver name */
+	if (sof_parent) {
+		card->name = SOF_CARD_NAME;
+		card->driver_name = SOF_DRIVER_NAME;
+	} else {
+		card->name = CARD_NAME;
+		card->driver_name = DRIVER_NAME;
+	}
+
+	/* register the soc card */
+	ret = devm_snd_soc_register_card(&pdev->dev, card);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"snd_soc_register_card failed %d\n", ret);
+		return ret;
+	}
+	platform_set_drvdata(pdev, card);
+
+	return 0;
+}
+
+static struct platform_driver snd_cht_mc_driver = {
+	.driver = {
+		.name = "cht-yogabook",
+	},
+	.probe = snd_cht_mc_probe,
+};
+
+module_platform_driver(snd_cht_mc_driver);
+
+MODULE_DESCRIPTION("Lenovo Yoga Book YB1-X91 machine driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:cht-yogabook");
-- 
2.53.0