sound/soc/codecs/hdmi-codec.c - third_party/linux - Git at Google

 /*
  * ALSA SoC codec for HDMI encoder drivers
  * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
  * Author: Jyri Sarha <jsarha@ti.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 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/module.h>
 #include <linux/string.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/pcm_drm_eld.h>
 #include <sound/hdmi-codec.h>
 #include <sound/pcm_iec958.h>

 #include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */

 struct hdmi_device {
 	struct device *dev;
 	struct list_head list;
 	int cnt;
 };
 #define pos_to_hdmi_device(pos)	container_of((pos), struct hdmi_device, list)
 LIST_HEAD(hdmi_device_list);

 #define DAI_NAME_SIZE 16
 struct hdmi_codec_priv {
 	struct hdmi_codec_pdata hcd;
 	struct snd_soc_dai_driver *daidrv;
 	struct hdmi_codec_daifmt daifmt[2];
 	struct mutex current_stream_lock;
 	struct snd_pcm_substream *current_stream;
 	struct snd_pcm_hw_constraint_list ratec;
 	uint8_t eld[MAX_ELD_BYTES];
 };

 static const struct snd_soc_dapm_widget hdmi_widgets[] = {
 	SND_SOC_DAPM_OUTPUT("TX"),
 };

 static const struct snd_soc_dapm_route hdmi_routes[] = {
 	{ "TX", NULL, "Playback" },
 };

 enum {
 	DAI_ID_I2S = 0,
 	DAI_ID_SPDIF,
 };

 static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
 			     struct snd_ctl_elem_info *uinfo)
 {
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 	struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);

 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 	uinfo->count = sizeof(hcp->eld);

 	return 0;
 }

 static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
 			    struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 	struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);

 	memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));

 	return 0;
 }

 static const struct snd_kcontrol_new hdmi_controls[] = {
 	{
 		.access = SNDRV_CTL_ELEM_ACCESS_READ |
 			  SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
 		.name = "ELD",
 		.info = hdmi_eld_ctl_info,
 		.get = hdmi_eld_ctl_get,
 	},
 };

 static int hdmi_codec_new_stream(struct snd_pcm_substream *substream,
 				 struct snd_soc_dai *dai)
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 	int ret = 0;

 	mutex_lock(&hcp->current_stream_lock);
 	if (!hcp->current_stream) {
 		hcp->current_stream = substream;
 	} else if (hcp->current_stream != substream) {
 		dev_err(dai->dev, "Only one simultaneous stream supported!\n");
 		ret = -EINVAL;
 	}
 	mutex_unlock(&hcp->current_stream_lock);

 	return ret;
 }

 static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 			      struct snd_soc_dai *dai)
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 	int ret = 0;

 	dev_dbg(dai->dev, "%s()\n", __func__);

 	ret = hdmi_codec_new_stream(substream, dai);
 	if (ret)
 		return ret;

 	if (hcp->hcd.ops->audio_startup) {
 		ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
 		if (ret) {
 			mutex_lock(&hcp->current_stream_lock);
 			hcp->current_stream = NULL;
 			mutex_unlock(&hcp->current_stream_lock);
 			return ret;
 		}
 	}

 	if (hcp->hcd.ops->get_eld) {
 		ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
 					    hcp->eld, sizeof(hcp->eld));

 		if (!ret) {
 			ret = snd_pcm_hw_constraint_eld(substream->runtime,
 							hcp->eld);
 			if (ret)
 				return ret;
 		}
 	}
 	return 0;
 }

 static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
 				struct snd_soc_dai *dai)
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);

 	dev_dbg(dai->dev, "%s()\n", __func__);

 	WARN_ON(hcp->current_stream != substream);

 	hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);

 	mutex_lock(&hcp->current_stream_lock);
 	hcp->current_stream = NULL;
 	mutex_unlock(&hcp->current_stream_lock);
 }

 static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
 				struct snd_pcm_hw_params *params,
 				struct snd_soc_dai *dai)
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 	struct hdmi_codec_params hp = {
 		.iec = {
 			.status = { 0 },
 			.subcode = { 0 },
 			.pad = 0,
 			.dig_subframe = { 0 },
 		}
 	};
 	int ret;

 	dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
 		params_width(params), params_rate(params),
 		params_channels(params));

 	if (params_width(params) > 24)
 		params->msbits = 24;

 	ret = snd_pcm_create_iec958_consumer_hw_params(params, hp.iec.status,
 						       sizeof(hp.iec.status));
 	if (ret < 0) {
 		dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
 			ret);
 		return ret;
 	}

 	ret = hdmi_codec_new_stream(substream, dai);
 	if (ret)
 		return ret;

 	hdmi_audio_infoframe_init(&hp.cea);
 	hp.cea.channels = params_channels(params);
 	hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
 	hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
 	hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;

 	hp.sample_width = params_width(params);
 	hp.sample_rate = params_rate(params);
 	hp.channels = params_channels(params);

 	return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
 				       &hcp->daifmt[dai->id], &hp);
 }

 static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
 			      unsigned int fmt)
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 	struct hdmi_codec_daifmt cf = { 0 };
 	int ret = 0;

 	dev_dbg(dai->dev, "%s()\n", __func__);

 	if (dai->id == DAI_ID_SPDIF) {
 		cf.fmt = HDMI_SPDIF;
 	} else {
 		switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 		case SND_SOC_DAIFMT_CBM_CFM:
 			cf.bit_clk_master = 1;
 			cf.frame_clk_master = 1;
 			break;
 		case SND_SOC_DAIFMT_CBS_CFM:
 			cf.frame_clk_master = 1;
 			break;
 		case SND_SOC_DAIFMT_CBM_CFS:
 			cf.bit_clk_master = 1;
 			break;
 		case SND_SOC_DAIFMT_CBS_CFS:
 			break;
 		default:
 			return -EINVAL;
 		}

 		switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 		case SND_SOC_DAIFMT_NB_NF:
 			break;
 		case SND_SOC_DAIFMT_NB_IF:
 			cf.frame_clk_inv = 1;
 			break;
 		case SND_SOC_DAIFMT_IB_NF:
 			cf.bit_clk_inv = 1;
 			break;
 		case SND_SOC_DAIFMT_IB_IF:
 			cf.frame_clk_inv = 1;
 			cf.bit_clk_inv = 1;
 			break;
 		}

 		switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 		case SND_SOC_DAIFMT_I2S:
 			cf.fmt = HDMI_I2S;
 			break;
 		case SND_SOC_DAIFMT_DSP_A:
 			cf.fmt = HDMI_DSP_A;
 			break;
 		case SND_SOC_DAIFMT_DSP_B:
 			cf.fmt = HDMI_DSP_B;
 			break;
 		case SND_SOC_DAIFMT_RIGHT_J:
 			cf.fmt = HDMI_RIGHT_J;
 			break;
 		case SND_SOC_DAIFMT_LEFT_J:
 			cf.fmt = HDMI_LEFT_J;
 			break;
 		case SND_SOC_DAIFMT_AC97:
 			cf.fmt = HDMI_AC97;
 			break;
 		default:
 			dev_err(dai->dev, "Invalid DAI interface format\n");
 			return -EINVAL;
 		}
 	}

 	hcp->daifmt[dai->id] = cf;

 	return ret;
 }

 static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);

 	dev_dbg(dai->dev, "%s()\n", __func__);

 	if (hcp->hcd.ops->digital_mute)
 		return hcp->hcd.ops->digital_mute(dai->dev->parent,
 						  hcp->hcd.data, mute);

 	return 0;
 }

 static const struct snd_soc_dai_ops hdmi_dai_ops = {
 	.startup	= hdmi_codec_startup,
 	.shutdown	= hdmi_codec_shutdown,
 	.hw_params	= hdmi_codec_hw_params,
 	.set_fmt	= hdmi_codec_set_fmt,
 	.digital_mute	= hdmi_codec_digital_mute,
 };


 #define 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)

 #define SPDIF_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
 			 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
 			 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
 			 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)

 /*
  * This list is only for formats allowed on the I2S bus. So there is
  * some formats listed that are not supported by HDMI interface. For
  * instance allowing the 32-bit formats enables 24-precision with CPU
  * DAIs that do not support 24-bit formats. If the extra formats cause
  * problems, we should add the video side driver an option to disable
  * them.
  */
 #define I2S_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
 			 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
 			 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
 			 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\
 			 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE)

 static struct snd_soc_dai_driver hdmi_i2s_dai = {
 	.id = DAI_ID_I2S,
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,
 		.channels_max = 8,
 		.rates = HDMI_RATES,
 		.formats = I2S_FORMATS,
 		.sig_bits = 24,
 	},
 	.ops = &hdmi_dai_ops,
 };

 static const struct snd_soc_dai_driver hdmi_spdif_dai = {
 	.id = DAI_ID_SPDIF,
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = HDMI_RATES,
 		.formats = SPDIF_FORMATS,
 	},
 	.ops = &hdmi_dai_ops,
 };

 static char hdmi_dai_name[][DAI_NAME_SIZE] = {
 	"hdmi-hifi.0",
 	"hdmi-hifi.1",
 	"hdmi-hifi.2",
 	"hdmi-hifi.3",
 };

 static int hdmi_of_xlate_dai_name(struct snd_soc_component *component,
 				  struct of_phandle_args *args,
 				  const char **dai_name)
 {
 	int id;

 	if (args->args_count)
 		id = args->args[0];
 	else
 		id = 0;

 	if (id < ARRAY_SIZE(hdmi_dai_name)) {
 		*dai_name = hdmi_dai_name[id];
 		return 0;
 	}

 	return -EAGAIN;
 }

 static struct snd_soc_codec_driver hdmi_codec = {
 	.component_driver = {
 		.controls		= hdmi_controls,
 		.num_controls		= ARRAY_SIZE(hdmi_controls),
 		.dapm_widgets		= hdmi_widgets,
 		.num_dapm_widgets	= ARRAY_SIZE(hdmi_widgets),
 		.dapm_routes		= hdmi_routes,
 		.num_dapm_routes	= ARRAY_SIZE(hdmi_routes),
 		.of_xlate_dai_name	= hdmi_of_xlate_dai_name,
 	},
 };

 static int hdmi_codec_probe(struct platform_device *pdev)
 {
 	struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
 	struct device *dev = &pdev->dev;
 	struct hdmi_codec_priv *hcp;
 	struct hdmi_device *hd;
 	struct list_head *pos;
 	int dai_count, i = 0;
 	int ret;

 	dev_dbg(dev, "%s()\n", __func__);

 	if (!hcd) {
 		dev_err(dev, "%s: No plalform data\n", __func__);
 		return -EINVAL;
 	}

 	dai_count = hcd->i2s + hcd->spdif;
 	if (dai_count < 1 || !hcd->ops || !hcd->ops->hw_params ||
 	    !hcd->ops->audio_shutdown) {
 		dev_err(dev, "%s: Invalid parameters\n", __func__);
 		return -EINVAL;
 	}

 	hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL);
 	if (!hcp)
 		return -ENOMEM;

 	hd = NULL;
 	list_for_each(pos, &hdmi_device_list) {
 		struct hdmi_device *tmp = pos_to_hdmi_device(pos);

 		if (tmp->dev == dev->parent) {
 			hd = tmp;
 			break;
 		}
 	}

 	if (!hd) {
 		hd = devm_kzalloc(dev, sizeof(*hd), GFP_KERNEL);
 		if (!hd)
 			return -ENOMEM;

 		hd->dev = dev->parent;

 		list_add_tail(&hd->list, &hdmi_device_list);
 	}

 	if (hd->cnt >= ARRAY_SIZE(hdmi_dai_name)) {
 		dev_err(dev, "too many hdmi codec are deteced\n");
 		return -EINVAL;
 	}

 	hcp->hcd = *hcd;
 	mutex_init(&hcp->current_stream_lock);

 	hcp->daidrv = devm_kzalloc(dev, dai_count * sizeof(*hcp->daidrv),
 				   GFP_KERNEL);
 	if (!hcp->daidrv)
 		return -ENOMEM;

 	if (hcd->i2s) {
 		hcp->daidrv[i] = hdmi_i2s_dai;
 		hcp->daidrv[i].playback.channels_max =
 			hcd->max_i2s_channels;
 		hcp->daidrv[i].name = hdmi_dai_name[hd->cnt++];
 		i++;
 	}

 	if (hcd->spdif) {
 		hcp->daidrv[i] = hdmi_spdif_dai;
 		hcp->daidrv[i].name = hdmi_dai_name[hd->cnt++];
 	}

 	ret = snd_soc_register_codec(dev, &hdmi_codec, hcp->daidrv,
 				     dai_count);
 	if (ret) {
 		dev_err(dev, "%s: snd_soc_register_codec() failed (%d)\n",
 			__func__, ret);
 		return ret;
 	}

 	dev_set_drvdata(dev, hcp);
 	return 0;
 }

 static int hdmi_codec_remove(struct platform_device *pdev)
 {
 	snd_soc_unregister_codec(&pdev->dev);
 	return 0;
 }

 static struct platform_driver hdmi_codec_driver = {
 	.driver = {
 		.name = HDMI_CODEC_DRV_NAME,
 	},
 	.probe = hdmi_codec_probe,
 	.remove = hdmi_codec_remove,
 };

 module_platform_driver(hdmi_codec_driver);

 MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
 MODULE_DESCRIPTION("HDMI Audio Codec Driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);
	/*
	* ALSA SoC codec for HDMI encoder drivers
	* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
	* Author: Jyri Sarha <jsarha@ti.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 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/module.h>
	#include <linux/string.h>
	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/pcm_params.h>
	#include <sound/soc.h>
	#include <sound/pcm_drm_eld.h>
	#include <sound/hdmi-codec.h>
	#include <sound/pcm_iec958.h>

	#include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */

	struct hdmi_device {
	struct device *dev;
	struct list_head list;
	int cnt;
	};
	#define pos_to_hdmi_device(pos) container_of((pos), struct hdmi_device, list)
	LIST_HEAD(hdmi_device_list);

	#define DAI_NAME_SIZE 16
	struct hdmi_codec_priv {
	struct hdmi_codec_pdata hcd;
	struct snd_soc_dai_driver *daidrv;
	struct hdmi_codec_daifmt daifmt[2];
	struct mutex current_stream_lock;
	struct snd_pcm_substream *current_stream;
	struct snd_pcm_hw_constraint_list ratec;
	uint8_t eld[MAX_ELD_BYTES];
	};

	static const struct snd_soc_dapm_widget hdmi_widgets[] = {
	SND_SOC_DAPM_OUTPUT("TX"),
	};

	static const struct snd_soc_dapm_route hdmi_routes[] = {
	{ "TX", NULL, "Playback" },
	};

	enum {
	DAI_ID_I2S = 0,
	DAI_ID_SPDIF,
	};

	static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
	{
	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
	struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);

	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
	uinfo->count = sizeof(hcp->eld);

	return 0;
	}

	static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
	struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);

	memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));

	return 0;
	}

	static const struct snd_kcontrol_new hdmi_controls[] = {
	{
	.access = SNDRV_CTL_ELEM_ACCESS_READ \|
	SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
	.name = "ELD",
	.info = hdmi_eld_ctl_info,
	.get = hdmi_eld_ctl_get,
	},
	};

	static int hdmi_codec_new_stream(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
	int ret = 0;

	mutex_lock(&hcp->current_stream_lock);
	if (!hcp->current_stream) {
	hcp->current_stream = substream;
	} else if (hcp->current_stream != substream) {
	dev_err(dai->dev, "Only one simultaneous stream supported!\n");
	ret = -EINVAL;
	}
	mutex_unlock(&hcp->current_stream_lock);

	return ret;
	}

	static int hdmi_codec_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
	int ret = 0;

	dev_dbg(dai->dev, "%s()\n", __func__);

	ret = hdmi_codec_new_stream(substream, dai);
	if (ret)
	return ret;

	if (hcp->hcd.ops->audio_startup) {
	ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
	if (ret) {
	mutex_lock(&hcp->current_stream_lock);
	hcp->current_stream = NULL;
	mutex_unlock(&hcp->current_stream_lock);
	return ret;
	}
	}

	if (hcp->hcd.ops->get_eld) {
	ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
	hcp->eld, sizeof(hcp->eld));

	if (!ret) {
	ret = snd_pcm_hw_constraint_eld(substream->runtime,
	hcp->eld);
	if (ret)
	return ret;
	}
	}
	return 0;
	}

	static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);

	dev_dbg(dai->dev, "%s()\n", __func__);

	WARN_ON(hcp->current_stream != substream);

	hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);

	mutex_lock(&hcp->current_stream_lock);
	hcp->current_stream = NULL;
	mutex_unlock(&hcp->current_stream_lock);
	}

	static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
	{
	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
	struct hdmi_codec_params hp = {
	.iec = {
	.status = { 0 },
	.subcode = { 0 },
	.pad = 0,
	.dig_subframe = { 0 },
	}
	};
	int ret;

	dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
	params_width(params), params_rate(params),
	params_channels(params));

	if (params_width(params) > 24)
	params->msbits = 24;

	ret = snd_pcm_create_iec958_consumer_hw_params(params, hp.iec.status,
	sizeof(hp.iec.status));
	if (ret < 0) {
	dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
	ret);
	return ret;
	}

	ret = hdmi_codec_new_stream(substream, dai);
	if (ret)
	return ret;

	hdmi_audio_infoframe_init(&hp.cea);
	hp.cea.channels = params_channels(params);
	hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
	hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
	hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;

	hp.sample_width = params_width(params);
	hp.sample_rate = params_rate(params);
	hp.channels = params_channels(params);

	return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
	&hcp->daifmt[dai->id], &hp);
	}

	static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
	unsigned int fmt)
	{
	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
	struct hdmi_codec_daifmt cf = { 0 };
	int ret = 0;

	dev_dbg(dai->dev, "%s()\n", __func__);

	if (dai->id == DAI_ID_SPDIF) {
	cf.fmt = HDMI_SPDIF;
	} else {
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
	cf.bit_clk_master = 1;
	cf.frame_clk_master = 1;
	break;
	case SND_SOC_DAIFMT_CBS_CFM:
	cf.frame_clk_master = 1;
	break;
	case SND_SOC_DAIFMT_CBM_CFS:
	cf.bit_clk_master = 1;
	break;
	case SND_SOC_DAIFMT_CBS_CFS:
	break;
	default:
	return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
	break;
	case SND_SOC_DAIFMT_NB_IF:
	cf.frame_clk_inv = 1;
	break;
	case SND_SOC_DAIFMT_IB_NF:
	cf.bit_clk_inv = 1;
	break;
	case SND_SOC_DAIFMT_IB_IF:
	cf.frame_clk_inv = 1;
	cf.bit_clk_inv = 1;
	break;
	}

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
	cf.fmt = HDMI_I2S;
	break;
	case SND_SOC_DAIFMT_DSP_A:
	cf.fmt = HDMI_DSP_A;
	break;
	case SND_SOC_DAIFMT_DSP_B:
	cf.fmt = HDMI_DSP_B;
	break;
	case SND_SOC_DAIFMT_RIGHT_J:
	cf.fmt = HDMI_RIGHT_J;
	break;
	case SND_SOC_DAIFMT_LEFT_J:
	cf.fmt = HDMI_LEFT_J;
	break;
	case SND_SOC_DAIFMT_AC97:
	cf.fmt = HDMI_AC97;
	break;
	default:
	dev_err(dai->dev, "Invalid DAI interface format\n");
	return -EINVAL;
	}
	}

	hcp->daifmt[dai->id] = cf;

	return ret;
	}

	static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
	{
	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);

	dev_dbg(dai->dev, "%s()\n", __func__);

	if (hcp->hcd.ops->digital_mute)
	return hcp->hcd.ops->digital_mute(dai->dev->parent,
	hcp->hcd.data, mute);

	return 0;
	}

	static const struct snd_soc_dai_ops hdmi_dai_ops = {
	.startup = hdmi_codec_startup,
	.shutdown = hdmi_codec_shutdown,
	.hw_params = hdmi_codec_hw_params,
	.set_fmt = hdmi_codec_set_fmt,
	.digital_mute = hdmi_codec_digital_mute,
	};


	#define 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)

	#define SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S16_BE \|\
	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_S20_3BE \|\
	SNDRV_PCM_FMTBIT_S24_3LE \| SNDRV_PCM_FMTBIT_S24_3BE \|\
	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S24_BE)

	/*
	* This list is only for formats allowed on the I2S bus. So there is
	* some formats listed that are not supported by HDMI interface. For
	* instance allowing the 32-bit formats enables 24-precision with CPU
	* DAIs that do not support 24-bit formats. If the extra formats cause
	* problems, we should add the video side driver an option to disable
	* them.
	*/
	#define I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S16_BE \|\
	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_S20_3BE \|\
	SNDRV_PCM_FMTBIT_S24_3LE \| SNDRV_PCM_FMTBIT_S24_3BE \|\
	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S24_BE \|\
	SNDRV_PCM_FMTBIT_S32_LE \| SNDRV_PCM_FMTBIT_S32_BE)

	static struct snd_soc_dai_driver hdmi_i2s_dai = {
	.id = DAI_ID_I2S,
	.playback = {
	.stream_name = "Playback",
	.channels_min = 2,
	.channels_max = 8,
	.rates = HDMI_RATES,
	.formats = I2S_FORMATS,
	.sig_bits = 24,
	},
	.ops = &hdmi_dai_ops,
	};

	static const struct snd_soc_dai_driver hdmi_spdif_dai = {
	.id = DAI_ID_SPDIF,
	.playback = {
	.stream_name = "Playback",
	.channels_min = 2,
	.channels_max = 2,
	.rates = HDMI_RATES,
	.formats = SPDIF_FORMATS,
	},
	.ops = &hdmi_dai_ops,
	};

	static char hdmi_dai_name[][DAI_NAME_SIZE] = {
	"hdmi-hifi.0",
	"hdmi-hifi.1",
	"hdmi-hifi.2",
	"hdmi-hifi.3",
	};

	static int hdmi_of_xlate_dai_name(struct snd_soc_component *component,
	struct of_phandle_args *args,
	const char **dai_name)
	{
	int id;

	if (args->args_count)
	id = args->args[0];
	else
	id = 0;

	if (id < ARRAY_SIZE(hdmi_dai_name)) {
	*dai_name = hdmi_dai_name[id];
	return 0;
	}

	return -EAGAIN;
	}

	static struct snd_soc_codec_driver hdmi_codec = {
	.component_driver = {
	.controls = hdmi_controls,
	.num_controls = ARRAY_SIZE(hdmi_controls),
	.dapm_widgets = hdmi_widgets,
	.num_dapm_widgets = ARRAY_SIZE(hdmi_widgets),
	.dapm_routes = hdmi_routes,
	.num_dapm_routes = ARRAY_SIZE(hdmi_routes),
	.of_xlate_dai_name = hdmi_of_xlate_dai_name,
	},
	};

	static int hdmi_codec_probe(struct platform_device *pdev)
	{
	struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
	struct device *dev = &pdev->dev;
	struct hdmi_codec_priv *hcp;
	struct hdmi_device *hd;
	struct list_head *pos;
	int dai_count, i = 0;
	int ret;

	dev_dbg(dev, "%s()\n", __func__);

	if (!hcd) {
	dev_err(dev, "%s: No plalform data\n", __func__);
	return -EINVAL;
	}

	dai_count = hcd->i2s + hcd->spdif;
	if (dai_count < 1 \|\| !hcd->ops \|\| !hcd->ops->hw_params \|\|
	!hcd->ops->audio_shutdown) {
	dev_err(dev, "%s: Invalid parameters\n", __func__);
	return -EINVAL;
	}

	hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL);
	if (!hcp)
	return -ENOMEM;

	hd = NULL;
	list_for_each(pos, &hdmi_device_list) {
	struct hdmi_device *tmp = pos_to_hdmi_device(pos);

	if (tmp->dev == dev->parent) {
	hd = tmp;
	break;
	}
	}

	if (!hd) {
	hd = devm_kzalloc(dev, sizeof(*hd), GFP_KERNEL);
	if (!hd)
	return -ENOMEM;

	hd->dev = dev->parent;

	list_add_tail(&hd->list, &hdmi_device_list);
	}

	if (hd->cnt >= ARRAY_SIZE(hdmi_dai_name)) {
	dev_err(dev, "too many hdmi codec are deteced\n");
	return -EINVAL;
	}

	hcp->hcd = *hcd;
	mutex_init(&hcp->current_stream_lock);

	hcp->daidrv = devm_kzalloc(dev, dai_count * sizeof(*hcp->daidrv),
	GFP_KERNEL);
	if (!hcp->daidrv)
	return -ENOMEM;

	if (hcd->i2s) {
	hcp->daidrv[i] = hdmi_i2s_dai;
	hcp->daidrv[i].playback.channels_max =
	hcd->max_i2s_channels;
	hcp->daidrv[i].name = hdmi_dai_name[hd->cnt++];
	i++;
	}

	if (hcd->spdif) {
	hcp->daidrv[i] = hdmi_spdif_dai;
	hcp->daidrv[i].name = hdmi_dai_name[hd->cnt++];
	}

	ret = snd_soc_register_codec(dev, &hdmi_codec, hcp->daidrv,
	dai_count);
	if (ret) {
	dev_err(dev, "%s: snd_soc_register_codec() failed (%d)\n",
	__func__, ret);
	return ret;
	}

	dev_set_drvdata(dev, hcp);
	return 0;
	}

	static int hdmi_codec_remove(struct platform_device *pdev)
	{
	snd_soc_unregister_codec(&pdev->dev);
	return 0;
	}

	static struct platform_driver hdmi_codec_driver = {
	.driver = {
	.name = HDMI_CODEC_DRV_NAME,
	},
	.probe = hdmi_codec_probe,
	.remove = hdmi_codec_remove,
	};

	module_platform_driver(hdmi_codec_driver);

	MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
	MODULE_DESCRIPTION("HDMI Audio Codec Driver");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);