sound/soc/codecs/hdac_hda.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 // Copyright(c) 2015-18 Intel Corporation.

 /*
  * hdac_hda.c - ASoC extensions to reuse the legacy HDA codec drivers
  * with ASoC platform drivers. These APIs are called by the legacy HDA
  * codec drivers using hdac_ext_bus_ops ops.
  */

 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/hdaudio_ext.h>
 #include <sound/hda_i915.h>
 #include <sound/hda_codec.h>
 #include <sound/hda_register.h>

 #include "hdac_hda.h"

 #define STUB_FORMATS	(SNDRV_PCM_FMTBIT_S8 | \
 			SNDRV_PCM_FMTBIT_U8 | \
 			SNDRV_PCM_FMTBIT_S16_LE | \
 			SNDRV_PCM_FMTBIT_U16_LE | \
 			SNDRV_PCM_FMTBIT_S24_LE | \
 			SNDRV_PCM_FMTBIT_U24_LE | \
 			SNDRV_PCM_FMTBIT_S32_LE | \
 			SNDRV_PCM_FMTBIT_U32_LE | \
 			SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)

 #define STUB_HDMI_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)

 static int hdac_hda_dai_open(struct snd_pcm_substream *substream,
 			     struct snd_soc_dai *dai);
 static void hdac_hda_dai_close(struct snd_pcm_substream *substream,
 			       struct snd_soc_dai *dai);
 static int hdac_hda_dai_prepare(struct snd_pcm_substream *substream,
 				struct snd_soc_dai *dai);
 static int hdac_hda_dai_hw_params(struct snd_pcm_substream *substream,
 				  struct snd_pcm_hw_params *params,
 				  struct snd_soc_dai *dai);
 static int hdac_hda_dai_hw_free(struct snd_pcm_substream *substream,
 				struct snd_soc_dai *dai);
 static int hdac_hda_dai_set_tdm_slot(struct snd_soc_dai *dai,
 				     unsigned int tx_mask, unsigned int rx_mask,
 				     int slots, int slot_width);
 static struct hda_pcm *snd_soc_find_pcm_from_dai(struct hdac_hda_priv *hda_pvt,
 						 struct snd_soc_dai *dai);

 static const struct snd_soc_dai_ops hdac_hda_dai_ops = {
 	.startup = hdac_hda_dai_open,
 	.shutdown = hdac_hda_dai_close,
 	.prepare = hdac_hda_dai_prepare,
 	.hw_params = hdac_hda_dai_hw_params,
 	.hw_free = hdac_hda_dai_hw_free,
 	.set_tdm_slot = hdac_hda_dai_set_tdm_slot,
 };

 static struct snd_soc_dai_driver hdac_hda_dais[] = {
 {
 	.id = HDAC_ANALOG_DAI_ID,
 	.name = "Analog Codec DAI",
 	.ops = &hdac_hda_dai_ops,
 	.playback = {
 		.stream_name	= "Analog Codec Playback",
 		.channels_min	= 1,
 		.channels_max	= 16,
 		.rates		= SNDRV_PCM_RATE_8000_192000,
 		.formats	= STUB_FORMATS,
 		.sig_bits	= 24,
 	},
 	.capture = {
 		.stream_name    = "Analog Codec Capture",
 		.channels_min   = 1,
 		.channels_max   = 16,
 		.rates = SNDRV_PCM_RATE_8000_192000,
 		.formats = STUB_FORMATS,
 		.sig_bits = 24,
 	},
 },
 {
 	.id = HDAC_DIGITAL_DAI_ID,
 	.name = "Digital Codec DAI",
 	.ops = &hdac_hda_dai_ops,
 	.playback = {
 		.stream_name    = "Digital Codec Playback",
 		.channels_min   = 1,
 		.channels_max   = 16,
 		.rates          = SNDRV_PCM_RATE_8000_192000,
 		.formats        = STUB_FORMATS,
 		.sig_bits = 24,
 	},
 	.capture = {
 		.stream_name    = "Digital Codec Capture",
 		.channels_min   = 1,
 		.channels_max   = 16,
 		.rates = SNDRV_PCM_RATE_8000_192000,
 		.formats = STUB_FORMATS,
 		.sig_bits = 24,
 	},
 },
 {
 	.id = HDAC_ALT_ANALOG_DAI_ID,
 	.name = "Alt Analog Codec DAI",
 	.ops = &hdac_hda_dai_ops,
 	.playback = {
 		.stream_name	= "Alt Analog Codec Playback",
 		.channels_min	= 1,
 		.channels_max	= 16,
 		.rates		= SNDRV_PCM_RATE_8000_192000,
 		.formats	= STUB_FORMATS,
 		.sig_bits	= 24,
 	},
 	.capture = {
 		.stream_name    = "Alt Analog Codec Capture",
 		.channels_min   = 1,
 		.channels_max   = 16,
 		.rates = SNDRV_PCM_RATE_8000_192000,
 		.formats = STUB_FORMATS,
 		.sig_bits = 24,
 	},
 },
 {
 	.id = HDAC_HDMI_0_DAI_ID,
 	.name = "intel-hdmi-hifi1",
 	.ops = &hdac_hda_dai_ops,
 	.playback = {
 		.stream_name    = "hifi1",
 		.channels_min   = 1,
 		.channels_max   = 32,
 		.rates          = STUB_HDMI_RATES,
 		.formats        = STUB_FORMATS,
 		.sig_bits = 24,
 	},
 },
 {
 	.id = HDAC_HDMI_1_DAI_ID,
 	.name = "intel-hdmi-hifi2",
 	.ops = &hdac_hda_dai_ops,
 	.playback = {
 		.stream_name    = "hifi2",
 		.channels_min   = 1,
 		.channels_max   = 32,
 		.rates          = STUB_HDMI_RATES,
 		.formats        = STUB_FORMATS,
 		.sig_bits = 24,
 	},
 },
 {
 	.id = HDAC_HDMI_2_DAI_ID,
 	.name = "intel-hdmi-hifi3",
 	.ops = &hdac_hda_dai_ops,
 	.playback = {
 		.stream_name    = "hifi3",
 		.channels_min   = 1,
 		.channels_max   = 32,
 		.rates          = STUB_HDMI_RATES,
 		.formats        = STUB_FORMATS,
 		.sig_bits = 24,
 	},
 },
 {
 	.id = HDAC_HDMI_3_DAI_ID,
 	.name = "intel-hdmi-hifi4",
 	.ops = &hdac_hda_dai_ops,
 	.playback = {
 		.stream_name    = "hifi4",
 		.channels_min   = 1,
 		.channels_max   = 32,
 		.rates          = STUB_HDMI_RATES,
 		.formats        = STUB_FORMATS,
 		.sig_bits = 24,
 	},
 },

 };

 static int hdac_hda_dai_set_tdm_slot(struct snd_soc_dai *dai,
 				     unsigned int tx_mask, unsigned int rx_mask,
 				     int slots, int slot_width)
 {
 	struct snd_soc_component *component = dai->component;
 	struct hdac_hda_priv *hda_pvt;
 	struct hdac_hda_pcm *pcm;

 	hda_pvt = snd_soc_component_get_drvdata(component);
 	pcm = &hda_pvt->pcm[dai->id];

 	if (tx_mask)
 		pcm->stream_tag[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask;
 	else
 		pcm->stream_tag[SNDRV_PCM_STREAM_CAPTURE] = rx_mask;

 	return 0;
 }

 static int hdac_hda_dai_hw_params(struct snd_pcm_substream *substream,
 				  struct snd_pcm_hw_params *params,
 				  struct snd_soc_dai *dai)
 {
 	struct snd_soc_component *component = dai->component;
 	struct hdac_hda_priv *hda_pvt;
 	unsigned int format_val;
 	unsigned int maxbps;

 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 		maxbps = dai->driver->playback.sig_bits;
 	else
 		maxbps = dai->driver->capture.sig_bits;

 	hda_pvt = snd_soc_component_get_drvdata(component);
 	format_val = snd_hdac_calc_stream_format(params_rate(params),
 						 params_channels(params),
 						 params_format(params),
 						 maxbps,
 						 0);
 	if (!format_val) {
 		dev_err(dai->dev,
 			"invalid format_val, rate=%d, ch=%d, format=%d, maxbps=%d\n",
 			params_rate(params), params_channels(params),
 			params_format(params), maxbps);

 		return -EINVAL;
 	}

 	hda_pvt->pcm[dai->id].format_val[substream->stream] = format_val;
 	return 0;
 }

 static int hdac_hda_dai_hw_free(struct snd_pcm_substream *substream,
 				struct snd_soc_dai *dai)
 {
 	struct snd_soc_component *component = dai->component;
 	struct hdac_hda_priv *hda_pvt;
 	struct hda_pcm_stream *hda_stream;
 	struct hda_pcm *pcm;

 	hda_pvt = snd_soc_component_get_drvdata(component);
 	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
 	if (!pcm)
 		return -EINVAL;

 	hda_stream = &pcm->stream[substream->stream];
 	snd_hda_codec_cleanup(&hda_pvt->codec, hda_stream, substream);

 	return 0;
 }

 static int hdac_hda_dai_prepare(struct snd_pcm_substream *substream,
 				struct snd_soc_dai *dai)
 {
 	struct snd_soc_component *component = dai->component;
 	struct hda_pcm_stream *hda_stream;
 	struct hdac_hda_priv *hda_pvt;
 	struct hdac_device *hdev;
 	unsigned int format_val;
 	struct hda_pcm *pcm;
 	unsigned int stream;
 	int ret = 0;

 	hda_pvt = snd_soc_component_get_drvdata(component);
 	hdev = &hda_pvt->codec.core;
 	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
 	if (!pcm)
 		return -EINVAL;

 	hda_stream = &pcm->stream[substream->stream];

 	stream = hda_pvt->pcm[dai->id].stream_tag[substream->stream];
 	format_val = hda_pvt->pcm[dai->id].format_val[substream->stream];

 	ret = snd_hda_codec_prepare(&hda_pvt->codec, hda_stream,
 				    stream, format_val, substream);
 	if (ret < 0)
 		dev_err(&hdev->dev, "codec prepare failed %d\n", ret);

 	return ret;
 }

 static int hdac_hda_dai_open(struct snd_pcm_substream *substream,
 			     struct snd_soc_dai *dai)
 {
 	struct snd_soc_component *component = dai->component;
 	struct hdac_hda_priv *hda_pvt;
 	struct hda_pcm_stream *hda_stream;
 	struct hda_pcm *pcm;
 	int ret;

 	hda_pvt = snd_soc_component_get_drvdata(component);
 	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
 	if (!pcm)
 		return -EINVAL;

 	snd_hda_codec_pcm_get(pcm);

 	hda_stream = &pcm->stream[substream->stream];

 	ret = hda_stream->ops.open(hda_stream, &hda_pvt->codec, substream);
 	if (ret < 0)
 		snd_hda_codec_pcm_put(pcm);

 	return ret;
 }

 static void hdac_hda_dai_close(struct snd_pcm_substream *substream,
 			       struct snd_soc_dai *dai)
 {
 	struct snd_soc_component *component = dai->component;
 	struct hdac_hda_priv *hda_pvt;
 	struct hda_pcm_stream *hda_stream;
 	struct hda_pcm *pcm;

 	hda_pvt = snd_soc_component_get_drvdata(component);
 	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
 	if (!pcm)
 		return;

 	hda_stream = &pcm->stream[substream->stream];

 	hda_stream->ops.close(hda_stream, &hda_pvt->codec, substream);

 	snd_hda_codec_pcm_put(pcm);
 }

 static struct hda_pcm *snd_soc_find_pcm_from_dai(struct hdac_hda_priv *hda_pvt,
 						 struct snd_soc_dai *dai)
 {
 	struct hda_codec *hcodec = &hda_pvt->codec;
 	struct hda_pcm *cpcm;
 	const char *pcm_name;

 	/*
 	 * map DAI ID to the closest matching PCM name, using the naming
 	 * scheme used by hda-codec snd_hda_gen_build_pcms() and for
 	 * HDMI in hda_codec patch_hdmi.c)
 	 */

 	switch (dai->id) {
 	case HDAC_ANALOG_DAI_ID:
 		pcm_name = "Analog";
 		break;
 	case HDAC_DIGITAL_DAI_ID:
 		pcm_name = "Digital";
 		break;
 	case HDAC_ALT_ANALOG_DAI_ID:
 		pcm_name = "Alt Analog";
 		break;
 	case HDAC_HDMI_0_DAI_ID:
 		pcm_name = "HDMI 0";
 		break;
 	case HDAC_HDMI_1_DAI_ID:
 		pcm_name = "HDMI 1";
 		break;
 	case HDAC_HDMI_2_DAI_ID:
 		pcm_name = "HDMI 2";
 		break;
 	case HDAC_HDMI_3_DAI_ID:
 		pcm_name = "HDMI 3";
 		break;
 	default:
 		dev_err(&hcodec->core.dev, "invalid dai id %d\n", dai->id);
 		return NULL;
 	}

 	list_for_each_entry(cpcm, &hcodec->pcm_list_head, list) {
 		if (strstr(cpcm->name, pcm_name))
 			return cpcm;
 	}

 	dev_err(&hcodec->core.dev, "didn't find PCM for DAI %s\n", dai->name);
 	return NULL;
 }

 static bool is_hdmi_codec(struct hda_codec *hcodec)
 {
 	struct hda_pcm *cpcm;

 	list_for_each_entry(cpcm, &hcodec->pcm_list_head, list) {
 		if (cpcm->pcm_type == HDA_PCM_TYPE_HDMI)
 			return true;
 	}

 	return false;
 }

 static int hdac_hda_codec_probe(struct snd_soc_component *component)
 {
 	struct hdac_hda_priv *hda_pvt =
 			snd_soc_component_get_drvdata(component);
 	struct snd_soc_dapm_context *dapm =
 			snd_soc_component_get_dapm(component);
 	struct hdac_device *hdev = &hda_pvt->codec.core;
 	struct hda_codec *hcodec = &hda_pvt->codec;
 	struct hdac_ext_link *hlink;
 	hda_codec_patch_t patch;
 	int ret;

 	hlink = snd_hdac_ext_bus_get_link(hdev->bus, dev_name(&hdev->dev));
 	if (!hlink) {
 		dev_err(&hdev->dev, "hdac link not found\n");
 		return -EIO;
 	}

 	snd_hdac_ext_bus_link_get(hdev->bus, hlink);

 	/*
 	 * Ensure any HDA display is powered at codec probe.
 	 * After snd_hda_codec_device_new(), display power is
 	 * managed by runtime PM.
 	 */
 	if (hda_pvt->need_display_power)
 		snd_hdac_display_power(hdev->bus,
 				       HDA_CODEC_IDX_CONTROLLER, true);

 	ret = snd_hda_codec_device_new(hcodec->bus, component->card->snd_card,
 				       hdev->addr, hcodec);
 	if (ret < 0) {
 		dev_err(&hdev->dev, "failed to create hda codec %d\n", ret);
 		goto error_no_pm;
 	}
 	/*
 	 * Overwrite type to HDA_DEV_ASOC since it is a ASoC driver
 	 * hda_codec.c will check this flag to determine if unregister
 	 * device is needed.
 	 */
 	hdev->type = HDA_DEV_ASOC;

 	/*
 	 * snd_hda_codec_device_new decrements the usage count so call get pm
 	 * else the device will be powered off
 	 */
 	pm_runtime_get_noresume(&hdev->dev);

 	hcodec->bus->card = dapm->card->snd_card;

 	ret = snd_hda_codec_set_name(hcodec, hcodec->preset->name);
 	if (ret < 0) {
 		dev_err(&hdev->dev, "name failed %s\n", hcodec->preset->name);
 		goto error_pm;
 	}

 	ret = snd_hdac_regmap_init(&hcodec->core);
 	if (ret < 0) {
 		dev_err(&hdev->dev, "regmap init failed\n");
 		goto error_pm;
 	}

 	patch = (hda_codec_patch_t)hcodec->preset->driver_data;
 	if (patch) {
 		ret = patch(hcodec);
 		if (ret < 0) {
 			dev_err(&hdev->dev, "patch failed %d\n", ret);
 			goto error_regmap;
 		}
 	} else {
 		dev_dbg(&hdev->dev, "no patch file found\n");
 	}

 	/* configure codec for 1:1 PCM:DAI mapping */
 	hcodec->mst_no_extra_pcms = 1;

 	ret = snd_hda_codec_parse_pcms(hcodec);
 	if (ret < 0) {
 		dev_err(&hdev->dev, "unable to map pcms to dai %d\n", ret);
 		goto error_regmap;
 	}

 	/* HDMI controls need to be created in machine drivers */
 	if (!is_hdmi_codec(hcodec)) {
 		ret = snd_hda_codec_build_controls(hcodec);
 		if (ret < 0) {
 			dev_err(&hdev->dev, "unable to create controls %d\n",
 				ret);
 			goto error_regmap;
 		}
 	}

 	hcodec->core.lazy_cache = true;

 	if (hda_pvt->need_display_power)
 		snd_hdac_display_power(hdev->bus,
 				       HDA_CODEC_IDX_CONTROLLER, false);

 	/*
 	 * hdac_device core already sets the state to active and calls
 	 * get_noresume. So enable runtime and set the device to suspend.
 	 * pm_runtime_enable is also called during codec registeration
 	 */
 	pm_runtime_put(&hdev->dev);
 	pm_runtime_suspend(&hdev->dev);

 	return 0;

 error_regmap:
 	snd_hdac_regmap_exit(hdev);
 error_pm:
 	pm_runtime_put(&hdev->dev);
 error_no_pm:
 	snd_hdac_ext_bus_link_put(hdev->bus, hlink);
 	return ret;
 }

 static void hdac_hda_codec_remove(struct snd_soc_component *component)
 {
 	struct hdac_hda_priv *hda_pvt =
 		      snd_soc_component_get_drvdata(component);
 	struct hdac_device *hdev = &hda_pvt->codec.core;
 	struct hdac_ext_link *hlink = NULL;

 	hlink = snd_hdac_ext_bus_get_link(hdev->bus, dev_name(&hdev->dev));
 	if (!hlink) {
 		dev_err(&hdev->dev, "hdac link not found\n");
 		return;
 	}

 	pm_runtime_disable(&hdev->dev);
 	snd_hdac_ext_bus_link_put(hdev->bus, hlink);

 	snd_hdac_regmap_exit(hdev);
 }

 static const struct snd_soc_dapm_route hdac_hda_dapm_routes[] = {
 	{"AIF1TX", NULL, "Codec Input Pin1"},
 	{"AIF2TX", NULL, "Codec Input Pin2"},
 	{"AIF3TX", NULL, "Codec Input Pin3"},

 	{"Codec Output Pin1", NULL, "AIF1RX"},
 	{"Codec Output Pin2", NULL, "AIF2RX"},
 	{"Codec Output Pin3", NULL, "AIF3RX"},
 };

 static const struct snd_soc_dapm_widget hdac_hda_dapm_widgets[] = {
 	/* Audio Interface */
 	SND_SOC_DAPM_AIF_IN("AIF1RX", "Analog Codec Playback", 0,
 			    SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("AIF2RX", "Digital Codec Playback", 0,
 			    SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("AIF3RX", "Alt Analog Codec Playback", 0,
 			    SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("AIF1TX", "Analog Codec Capture", 0,
 			     SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("AIF2TX", "Digital Codec Capture", 0,
 			     SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("AIF3TX", "Alt Analog Codec Capture", 0,
 			     SND_SOC_NOPM, 0, 0),

 	/* Input Pins */
 	SND_SOC_DAPM_INPUT("Codec Input Pin1"),
 	SND_SOC_DAPM_INPUT("Codec Input Pin2"),
 	SND_SOC_DAPM_INPUT("Codec Input Pin3"),

 	/* Output Pins */
 	SND_SOC_DAPM_OUTPUT("Codec Output Pin1"),
 	SND_SOC_DAPM_OUTPUT("Codec Output Pin2"),
 	SND_SOC_DAPM_OUTPUT("Codec Output Pin3"),
 };

 static const struct snd_soc_component_driver hdac_hda_codec = {
 	.probe		= hdac_hda_codec_probe,
 	.remove		= hdac_hda_codec_remove,
 	.idle_bias_on	= false,
 	.dapm_widgets           = hdac_hda_dapm_widgets,
 	.num_dapm_widgets       = ARRAY_SIZE(hdac_hda_dapm_widgets),
 	.dapm_routes            = hdac_hda_dapm_routes,
 	.num_dapm_routes        = ARRAY_SIZE(hdac_hda_dapm_routes),
 };

 static int hdac_hda_dev_probe(struct hdac_device *hdev)
 {
 	struct hdac_ext_link *hlink;
 	struct hdac_hda_priv *hda_pvt;
 	int ret;

 	/* hold the ref while we probe */
 	hlink = snd_hdac_ext_bus_get_link(hdev->bus, dev_name(&hdev->dev));
 	if (!hlink) {
 		dev_err(&hdev->dev, "hdac link not found\n");
 		return -EIO;
 	}
 	snd_hdac_ext_bus_link_get(hdev->bus, hlink);

 	hda_pvt = hdac_to_hda_priv(hdev);
 	if (!hda_pvt)
 		return -ENOMEM;

 	/* ASoC specific initialization */
 	ret = devm_snd_soc_register_component(&hdev->dev,
 					 &hdac_hda_codec, hdac_hda_dais,
 					 ARRAY_SIZE(hdac_hda_dais));
 	if (ret < 0) {
 		dev_err(&hdev->dev, "failed to register HDA codec %d\n", ret);
 		return ret;
 	}

 	dev_set_drvdata(&hdev->dev, hda_pvt);
 	snd_hdac_ext_bus_link_put(hdev->bus, hlink);

 	return ret;
 }

 static int hdac_hda_dev_remove(struct hdac_device *hdev)
 {
 	struct hdac_hda_priv *hda_pvt;

 	hda_pvt = dev_get_drvdata(&hdev->dev);
 	if (hda_pvt && hda_pvt->codec.registered)
 		cancel_delayed_work_sync(&hda_pvt->codec.jackpoll_work);

 	return 0;
 }

 static struct hdac_ext_bus_ops hdac_ops = {
 	.hdev_attach = hdac_hda_dev_probe,
 	.hdev_detach = hdac_hda_dev_remove,
 };

 struct hdac_ext_bus_ops *snd_soc_hdac_hda_get_ops(void)
 {
 	return &hdac_ops;
 }
 EXPORT_SYMBOL_GPL(snd_soc_hdac_hda_get_ops);

 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("ASoC Extensions for legacy HDA Drivers");
 MODULE_AUTHOR("Rakesh Ughreja<rakesh.a.ughreja@intel.com>");
	// SPDX-License-Identifier: GPL-2.0
	// Copyright(c) 2015-18 Intel Corporation.

	/*
	* hdac_hda.c - ASoC extensions to reuse the legacy HDA codec drivers
	* with ASoC platform drivers. These APIs are called by the legacy HDA
	* codec drivers using hdac_ext_bus_ops ops.
	*/

	#include <linux/init.h>
	#include <linux/delay.h>
	#include <linux/module.h>
	#include <linux/pm_runtime.h>
	#include <sound/pcm_params.h>
	#include <sound/soc.h>
	#include <sound/hdaudio_ext.h>
	#include <sound/hda_i915.h>
	#include <sound/hda_codec.h>
	#include <sound/hda_register.h>

	#include "hdac_hda.h"

	#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 \| \
	SNDRV_PCM_FMTBIT_U8 \| \
	SNDRV_PCM_FMTBIT_S16_LE \| \
	SNDRV_PCM_FMTBIT_U16_LE \| \
	SNDRV_PCM_FMTBIT_S24_LE \| \
	SNDRV_PCM_FMTBIT_U24_LE \| \
	SNDRV_PCM_FMTBIT_S32_LE \| \
	SNDRV_PCM_FMTBIT_U32_LE \| \
	SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)

	#define STUB_HDMI_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)

	static int hdac_hda_dai_open(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai);
	static void hdac_hda_dai_close(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai);
	static int hdac_hda_dai_prepare(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai);
	static int hdac_hda_dai_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai);
	static int hdac_hda_dai_hw_free(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai);
	static int hdac_hda_dai_set_tdm_slot(struct snd_soc_dai *dai,
	unsigned int tx_mask, unsigned int rx_mask,
	int slots, int slot_width);
	static struct hda_pcm snd_soc_find_pcm_from_dai(struct hdac_hda_priv hda_pvt,
	struct snd_soc_dai *dai);

	static const struct snd_soc_dai_ops hdac_hda_dai_ops = {
	.startup = hdac_hda_dai_open,
	.shutdown = hdac_hda_dai_close,
	.prepare = hdac_hda_dai_prepare,
	.hw_params = hdac_hda_dai_hw_params,
	.hw_free = hdac_hda_dai_hw_free,
	.set_tdm_slot = hdac_hda_dai_set_tdm_slot,
	};

	static struct snd_soc_dai_driver hdac_hda_dais[] = {
	{
	.id = HDAC_ANALOG_DAI_ID,
	.name = "Analog Codec DAI",
	.ops = &hdac_hda_dai_ops,
	.playback = {
	.stream_name = "Analog Codec Playback",
	.channels_min = 1,
	.channels_max = 16,
	.rates = SNDRV_PCM_RATE_8000_192000,
	.formats = STUB_FORMATS,
	.sig_bits = 24,
	},
	.capture = {
	.stream_name = "Analog Codec Capture",
	.channels_min = 1,
	.channels_max = 16,
	.rates = SNDRV_PCM_RATE_8000_192000,
	.formats = STUB_FORMATS,
	.sig_bits = 24,
	},
	},
	{
	.id = HDAC_DIGITAL_DAI_ID,
	.name = "Digital Codec DAI",
	.ops = &hdac_hda_dai_ops,
	.playback = {
	.stream_name = "Digital Codec Playback",
	.channels_min = 1,
	.channels_max = 16,
	.rates = SNDRV_PCM_RATE_8000_192000,
	.formats = STUB_FORMATS,
	.sig_bits = 24,
	},
	.capture = {
	.stream_name = "Digital Codec Capture",
	.channels_min = 1,
	.channels_max = 16,
	.rates = SNDRV_PCM_RATE_8000_192000,
	.formats = STUB_FORMATS,
	.sig_bits = 24,
	},
	},
	{
	.id = HDAC_ALT_ANALOG_DAI_ID,
	.name = "Alt Analog Codec DAI",
	.ops = &hdac_hda_dai_ops,
	.playback = {
	.stream_name = "Alt Analog Codec Playback",
	.channels_min = 1,
	.channels_max = 16,
	.rates = SNDRV_PCM_RATE_8000_192000,
	.formats = STUB_FORMATS,
	.sig_bits = 24,
	},
	.capture = {
	.stream_name = "Alt Analog Codec Capture",
	.channels_min = 1,
	.channels_max = 16,
	.rates = SNDRV_PCM_RATE_8000_192000,
	.formats = STUB_FORMATS,
	.sig_bits = 24,
	},
	},
	{
	.id = HDAC_HDMI_0_DAI_ID,
	.name = "intel-hdmi-hifi1",
	.ops = &hdac_hda_dai_ops,
	.playback = {
	.stream_name = "hifi1",
	.channels_min = 1,
	.channels_max = 32,
	.rates = STUB_HDMI_RATES,
	.formats = STUB_FORMATS,
	.sig_bits = 24,
	},
	},
	{
	.id = HDAC_HDMI_1_DAI_ID,
	.name = "intel-hdmi-hifi2",
	.ops = &hdac_hda_dai_ops,
	.playback = {
	.stream_name = "hifi2",
	.channels_min = 1,
	.channels_max = 32,
	.rates = STUB_HDMI_RATES,
	.formats = STUB_FORMATS,
	.sig_bits = 24,
	},
	},
	{
	.id = HDAC_HDMI_2_DAI_ID,
	.name = "intel-hdmi-hifi3",
	.ops = &hdac_hda_dai_ops,
	.playback = {
	.stream_name = "hifi3",
	.channels_min = 1,
	.channels_max = 32,
	.rates = STUB_HDMI_RATES,
	.formats = STUB_FORMATS,
	.sig_bits = 24,
	},
	},
	{
	.id = HDAC_HDMI_3_DAI_ID,
	.name = "intel-hdmi-hifi4",
	.ops = &hdac_hda_dai_ops,
	.playback = {
	.stream_name = "hifi4",
	.channels_min = 1,
	.channels_max = 32,
	.rates = STUB_HDMI_RATES,
	.formats = STUB_FORMATS,
	.sig_bits = 24,
	},
	},

	};

	static int hdac_hda_dai_set_tdm_slot(struct snd_soc_dai *dai,
	unsigned int tx_mask, unsigned int rx_mask,
	int slots, int slot_width)
	{
	struct snd_soc_component *component = dai->component;
	struct hdac_hda_priv *hda_pvt;
	struct hdac_hda_pcm *pcm;

	hda_pvt = snd_soc_component_get_drvdata(component);
	pcm = &hda_pvt->pcm[dai->id];

	if (tx_mask)
	pcm->stream_tag[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask;
	else
	pcm->stream_tag[SNDRV_PCM_STREAM_CAPTURE] = rx_mask;

	return 0;
	}

	static int hdac_hda_dai_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
	{
	struct snd_soc_component *component = dai->component;
	struct hdac_hda_priv *hda_pvt;
	unsigned int format_val;
	unsigned int maxbps;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	maxbps = dai->driver->playback.sig_bits;
	else
	maxbps = dai->driver->capture.sig_bits;

	hda_pvt = snd_soc_component_get_drvdata(component);
	format_val = snd_hdac_calc_stream_format(params_rate(params),
	params_channels(params),
	params_format(params),
	maxbps,
	0);
	if (!format_val) {
	dev_err(dai->dev,
	"invalid format_val, rate=%d, ch=%d, format=%d, maxbps=%d\n",
	params_rate(params), params_channels(params),
	params_format(params), maxbps);

	return -EINVAL;
	}

	hda_pvt->pcm[dai->id].format_val[substream->stream] = format_val;
	return 0;
	}

	static int hdac_hda_dai_hw_free(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct snd_soc_component *component = dai->component;
	struct hdac_hda_priv *hda_pvt;
	struct hda_pcm_stream *hda_stream;
	struct hda_pcm *pcm;

	hda_pvt = snd_soc_component_get_drvdata(component);
	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
	if (!pcm)
	return -EINVAL;

	hda_stream = &pcm->stream[substream->stream];
	snd_hda_codec_cleanup(&hda_pvt->codec, hda_stream, substream);

	return 0;
	}

	static int hdac_hda_dai_prepare(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct snd_soc_component *component = dai->component;
	struct hda_pcm_stream *hda_stream;
	struct hdac_hda_priv *hda_pvt;
	struct hdac_device *hdev;
	unsigned int format_val;
	struct hda_pcm *pcm;
	unsigned int stream;
	int ret = 0;

	hda_pvt = snd_soc_component_get_drvdata(component);
	hdev = &hda_pvt->codec.core;
	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
	if (!pcm)
	return -EINVAL;

	hda_stream = &pcm->stream[substream->stream];

	stream = hda_pvt->pcm[dai->id].stream_tag[substream->stream];
	format_val = hda_pvt->pcm[dai->id].format_val[substream->stream];

	ret = snd_hda_codec_prepare(&hda_pvt->codec, hda_stream,
	stream, format_val, substream);
	if (ret < 0)
	dev_err(&hdev->dev, "codec prepare failed %d\n", ret);

	return ret;
	}

	static int hdac_hda_dai_open(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct snd_soc_component *component = dai->component;
	struct hdac_hda_priv *hda_pvt;
	struct hda_pcm_stream *hda_stream;
	struct hda_pcm *pcm;
	int ret;

	hda_pvt = snd_soc_component_get_drvdata(component);
	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
	if (!pcm)
	return -EINVAL;

	snd_hda_codec_pcm_get(pcm);

	hda_stream = &pcm->stream[substream->stream];

	ret = hda_stream->ops.open(hda_stream, &hda_pvt->codec, substream);
	if (ret < 0)
	snd_hda_codec_pcm_put(pcm);

	return ret;
	}

	static void hdac_hda_dai_close(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct snd_soc_component *component = dai->component;
	struct hdac_hda_priv *hda_pvt;
	struct hda_pcm_stream *hda_stream;
	struct hda_pcm *pcm;

	hda_pvt = snd_soc_component_get_drvdata(component);
	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
	if (!pcm)
	return;

	hda_stream = &pcm->stream[substream->stream];

	hda_stream->ops.close(hda_stream, &hda_pvt->codec, substream);

	snd_hda_codec_pcm_put(pcm);
	}

	static struct hda_pcm snd_soc_find_pcm_from_dai(struct hdac_hda_priv hda_pvt,
	struct snd_soc_dai *dai)
	{
	struct hda_codec *hcodec = &hda_pvt->codec;
	struct hda_pcm *cpcm;
	const char *pcm_name;

	/*
	* map DAI ID to the closest matching PCM name, using the naming
	* scheme used by hda-codec snd_hda_gen_build_pcms() and for
	* HDMI in hda_codec patch_hdmi.c)
	*/

	switch (dai->id) {
	case HDAC_ANALOG_DAI_ID:
	pcm_name = "Analog";
	break;
	case HDAC_DIGITAL_DAI_ID:
	pcm_name = "Digital";
	break;
	case HDAC_ALT_ANALOG_DAI_ID:
	pcm_name = "Alt Analog";
	break;
	case HDAC_HDMI_0_DAI_ID:
	pcm_name = "HDMI 0";
	break;
	case HDAC_HDMI_1_DAI_ID:
	pcm_name = "HDMI 1";
	break;
	case HDAC_HDMI_2_DAI_ID:
	pcm_name = "HDMI 2";
	break;
	case HDAC_HDMI_3_DAI_ID:
	pcm_name = "HDMI 3";
	break;
	default:
	dev_err(&hcodec->core.dev, "invalid dai id %d\n", dai->id);
	return NULL;
	}

	list_for_each_entry(cpcm, &hcodec->pcm_list_head, list) {
	if (strstr(cpcm->name, pcm_name))
	return cpcm;
	}

	dev_err(&hcodec->core.dev, "didn't find PCM for DAI %s\n", dai->name);
	return NULL;
	}

	static bool is_hdmi_codec(struct hda_codec *hcodec)
	{
	struct hda_pcm *cpcm;

	list_for_each_entry(cpcm, &hcodec->pcm_list_head, list) {
	if (cpcm->pcm_type == HDA_PCM_TYPE_HDMI)
	return true;
	}

	return false;
	}

	static int hdac_hda_codec_probe(struct snd_soc_component *component)
	{
	struct hdac_hda_priv *hda_pvt =
	snd_soc_component_get_drvdata(component);
	struct snd_soc_dapm_context *dapm =
	snd_soc_component_get_dapm(component);
	struct hdac_device *hdev = &hda_pvt->codec.core;
	struct hda_codec *hcodec = &hda_pvt->codec;
	struct hdac_ext_link *hlink;
	hda_codec_patch_t patch;
	int ret;

	hlink = snd_hdac_ext_bus_get_link(hdev->bus, dev_name(&hdev->dev));
	if (!hlink) {
	dev_err(&hdev->dev, "hdac link not found\n");
	return -EIO;
	}

	snd_hdac_ext_bus_link_get(hdev->bus, hlink);

	/*
	* Ensure any HDA display is powered at codec probe.
	* After snd_hda_codec_device_new(), display power is
	* managed by runtime PM.
	*/
	if (hda_pvt->need_display_power)
	snd_hdac_display_power(hdev->bus,
	HDA_CODEC_IDX_CONTROLLER, true);

	ret = snd_hda_codec_device_new(hcodec->bus, component->card->snd_card,
	hdev->addr, hcodec);
	if (ret < 0) {
	dev_err(&hdev->dev, "failed to create hda codec %d\n", ret);
	goto error_no_pm;
	}
	/*
	* Overwrite type to HDA_DEV_ASOC since it is a ASoC driver
	* hda_codec.c will check this flag to determine if unregister
	* device is needed.
	*/
	hdev->type = HDA_DEV_ASOC;

	/*
	* snd_hda_codec_device_new decrements the usage count so call get pm
	* else the device will be powered off
	*/
	pm_runtime_get_noresume(&hdev->dev);

	hcodec->bus->card = dapm->card->snd_card;

	ret = snd_hda_codec_set_name(hcodec, hcodec->preset->name);
	if (ret < 0) {
	dev_err(&hdev->dev, "name failed %s\n", hcodec->preset->name);
	goto error_pm;
	}

	ret = snd_hdac_regmap_init(&hcodec->core);
	if (ret < 0) {
	dev_err(&hdev->dev, "regmap init failed\n");
	goto error_pm;
	}

	patch = (hda_codec_patch_t)hcodec->preset->driver_data;
	if (patch) {
	ret = patch(hcodec);
	if (ret < 0) {
	dev_err(&hdev->dev, "patch failed %d\n", ret);
	goto error_regmap;
	}
	} else {
	dev_dbg(&hdev->dev, "no patch file found\n");
	}

	/* configure codec for 1:1 PCM:DAI mapping */
	hcodec->mst_no_extra_pcms = 1;

	ret = snd_hda_codec_parse_pcms(hcodec);
	if (ret < 0) {
	dev_err(&hdev->dev, "unable to map pcms to dai %d\n", ret);
	goto error_regmap;
	}

	/* HDMI controls need to be created in machine drivers */
	if (!is_hdmi_codec(hcodec)) {
	ret = snd_hda_codec_build_controls(hcodec);
	if (ret < 0) {
	dev_err(&hdev->dev, "unable to create controls %d\n",
	ret);
	goto error_regmap;
	}
	}

	hcodec->core.lazy_cache = true;

	if (hda_pvt->need_display_power)
	snd_hdac_display_power(hdev->bus,
	HDA_CODEC_IDX_CONTROLLER, false);

	/*
	* hdac_device core already sets the state to active and calls
	* get_noresume. So enable runtime and set the device to suspend.
	* pm_runtime_enable is also called during codec registeration
	*/
	pm_runtime_put(&hdev->dev);
	pm_runtime_suspend(&hdev->dev);

	return 0;

	error_regmap:
	snd_hdac_regmap_exit(hdev);
	error_pm:
	pm_runtime_put(&hdev->dev);
	error_no_pm:
	snd_hdac_ext_bus_link_put(hdev->bus, hlink);
	return ret;
	}

	static void hdac_hda_codec_remove(struct snd_soc_component *component)
	{
	struct hdac_hda_priv *hda_pvt =
	snd_soc_component_get_drvdata(component);
	struct hdac_device *hdev = &hda_pvt->codec.core;
	struct hdac_ext_link *hlink = NULL;

	hlink = snd_hdac_ext_bus_get_link(hdev->bus, dev_name(&hdev->dev));
	if (!hlink) {
	dev_err(&hdev->dev, "hdac link not found\n");
	return;
	}

	pm_runtime_disable(&hdev->dev);
	snd_hdac_ext_bus_link_put(hdev->bus, hlink);

	snd_hdac_regmap_exit(hdev);
	}

	static const struct snd_soc_dapm_route hdac_hda_dapm_routes[] = {
	{"AIF1TX", NULL, "Codec Input Pin1"},
	{"AIF2TX", NULL, "Codec Input Pin2"},
	{"AIF3TX", NULL, "Codec Input Pin3"},

	{"Codec Output Pin1", NULL, "AIF1RX"},
	{"Codec Output Pin2", NULL, "AIF2RX"},
	{"Codec Output Pin3", NULL, "AIF3RX"},
	};

	static const struct snd_soc_dapm_widget hdac_hda_dapm_widgets[] = {
	/* Audio Interface */
	SND_SOC_DAPM_AIF_IN("AIF1RX", "Analog Codec Playback", 0,
	SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_IN("AIF2RX", "Digital Codec Playback", 0,
	SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_IN("AIF3RX", "Alt Analog Codec Playback", 0,
	SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_OUT("AIF1TX", "Analog Codec Capture", 0,
	SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_OUT("AIF2TX", "Digital Codec Capture", 0,
	SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_OUT("AIF3TX", "Alt Analog Codec Capture", 0,
	SND_SOC_NOPM, 0, 0),

	/* Input Pins */
	SND_SOC_DAPM_INPUT("Codec Input Pin1"),
	SND_SOC_DAPM_INPUT("Codec Input Pin2"),
	SND_SOC_DAPM_INPUT("Codec Input Pin3"),

	/* Output Pins */
	SND_SOC_DAPM_OUTPUT("Codec Output Pin1"),
	SND_SOC_DAPM_OUTPUT("Codec Output Pin2"),
	SND_SOC_DAPM_OUTPUT("Codec Output Pin3"),
	};

	static const struct snd_soc_component_driver hdac_hda_codec = {
	.probe = hdac_hda_codec_probe,
	.remove = hdac_hda_codec_remove,
	.idle_bias_on = false,
	.dapm_widgets = hdac_hda_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(hdac_hda_dapm_widgets),
	.dapm_routes = hdac_hda_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(hdac_hda_dapm_routes),
	};

	static int hdac_hda_dev_probe(struct hdac_device *hdev)
	{
	struct hdac_ext_link *hlink;
	struct hdac_hda_priv *hda_pvt;
	int ret;

	/* hold the ref while we probe */
	hlink = snd_hdac_ext_bus_get_link(hdev->bus, dev_name(&hdev->dev));
	if (!hlink) {
	dev_err(&hdev->dev, "hdac link not found\n");
	return -EIO;
	}
	snd_hdac_ext_bus_link_get(hdev->bus, hlink);

	hda_pvt = hdac_to_hda_priv(hdev);
	if (!hda_pvt)
	return -ENOMEM;

	/* ASoC specific initialization */
	ret = devm_snd_soc_register_component(&hdev->dev,
	&hdac_hda_codec, hdac_hda_dais,
	ARRAY_SIZE(hdac_hda_dais));
	if (ret < 0) {
	dev_err(&hdev->dev, "failed to register HDA codec %d\n", ret);
	return ret;
	}

	dev_set_drvdata(&hdev->dev, hda_pvt);
	snd_hdac_ext_bus_link_put(hdev->bus, hlink);

	return ret;
	}

	static int hdac_hda_dev_remove(struct hdac_device *hdev)
	{
	struct hdac_hda_priv *hda_pvt;

	hda_pvt = dev_get_drvdata(&hdev->dev);
	if (hda_pvt && hda_pvt->codec.registered)
	cancel_delayed_work_sync(&hda_pvt->codec.jackpoll_work);

	return 0;
	}

	static struct hdac_ext_bus_ops hdac_ops = {
	.hdev_attach = hdac_hda_dev_probe,
	.hdev_detach = hdac_hda_dev_remove,
	};

	struct hdac_ext_bus_ops *snd_soc_hdac_hda_get_ops(void)
	{
	return &hdac_ops;
	}
	EXPORT_SYMBOL_GPL(snd_soc_hdac_hda_get_ops);

	MODULE_LICENSE("GPL v2");
	MODULE_DESCRIPTION("ASoC Extensions for legacy HDA Drivers");
	MODULE_AUTHOR("Rakesh Ughreja<rakesh.a.ughreja@intel.com>");