sound/pci/hda/patch_nvhdmi.c - kernel/windcharger - Git at Google

 /*
  * Universal Interface for Intel High Definition Audio Codec
  *
  * HD audio interface patch for NVIDIA HDMI codecs
  *
  * Copyright (c) 2008 NVIDIA Corp.  All rights reserved.
  * Copyright (c) 2008 Wei Ni <wni@nvidia.com>
  *
  *
  *  This driver is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This driver 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.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */

 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <sound/core.h>
 #include "hda_codec.h"
 #include "hda_local.h"

 struct nvhdmi_spec {
 	struct hda_multi_out multiout;

 	struct hda_pcm pcm_rec;
 };

 #define Nv_VERB_SET_Channel_Allocation          0xF79
 #define Nv_VERB_SET_Info_Frame_Checksum         0xF7A
 #define Nv_VERB_SET_Audio_Protection_On         0xF98
 #define Nv_VERB_SET_Audio_Protection_Off        0xF99

 #define Nv_Master_Convert_nid   0x04
 #define Nv_Master_Pin_nid       0x05

 static hda_nid_t nvhdmi_convert_nids[4] = {
 	/*front, rear, clfe, rear_surr */
 	0x6, 0x8, 0xa, 0xc,
 };

 static struct hda_verb nvhdmi_basic_init[] = {
 	/* set audio protect on */
 	{ 0x1, Nv_VERB_SET_Audio_Protection_On, 0x1},
 	/* enable digital output on pin widget */
 	{ 0x5, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT | 0x5 },
 	{ 0x7, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT | 0x5 },
 	{ 0x9, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT | 0x5 },
 	{ 0xb, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT | 0x5 },
 	{ 0xd, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT | 0x5 },
 	{} /* terminator */
 };

 /*
  * Controls
  */
 static int nvhdmi_build_controls(struct hda_codec *codec)
 {
 	struct nvhdmi_spec *spec = codec->spec;
 	int err;

 	err = snd_hda_create_spdif_out_ctls(codec, spec->multiout.dig_out_nid);
 	if (err < 0)
 		return err;

 	return 0;
 }

 static int nvhdmi_init(struct hda_codec *codec)
 {
 	snd_hda_sequence_write(codec, nvhdmi_basic_init);
 	return 0;
 }

 /*
  * Digital out
  */
 static int nvhdmi_dig_playback_pcm_open(struct hda_pcm_stream *hinfo,
 					struct hda_codec *codec,
 					struct snd_pcm_substream *substream)
 {
 	struct nvhdmi_spec *spec = codec->spec;
 	return snd_hda_multi_out_dig_open(codec, &spec->multiout);
 }

 static int nvhdmi_dig_playback_pcm_close_8ch(struct hda_pcm_stream *hinfo,
 					struct hda_codec *codec,
 					struct snd_pcm_substream *substream)
 {
 	struct nvhdmi_spec *spec = codec->spec;
 	int i;

 	snd_hda_codec_write(codec, Nv_Master_Convert_nid,
 			0, AC_VERB_SET_CHANNEL_STREAMID, 0);
 	for (i = 0; i < 4; i++) {
 		/* set the stream id */
 		snd_hda_codec_write(codec, nvhdmi_convert_nids[i], 0,
 				AC_VERB_SET_CHANNEL_STREAMID, 0);
 		/* set the stream format */
 		snd_hda_codec_write(codec, nvhdmi_convert_nids[i], 0,
 				AC_VERB_SET_STREAM_FORMAT, 0);
 	}

 	return snd_hda_multi_out_dig_close(codec, &spec->multiout);
 }

 static int nvhdmi_dig_playback_pcm_close_2ch(struct hda_pcm_stream *hinfo,
 					struct hda_codec *codec,
 					struct snd_pcm_substream *substream)
 {
 	struct nvhdmi_spec *spec = codec->spec;
 	return snd_hda_multi_out_dig_close(codec, &spec->multiout);
 }

 static int nvhdmi_dig_playback_pcm_prepare_8ch(struct hda_pcm_stream *hinfo,
 					struct hda_codec *codec,
 					unsigned int stream_tag,
 					unsigned int format,
 					struct snd_pcm_substream *substream)
 {
 	int chs;
 	unsigned int dataDCC1, dataDCC2, chan, chanmask, channel_id;
 	int i;

 	mutex_lock(&codec->spdif_mutex);

 	chs = substream->runtime->channels;
 	chan = chs ? (chs - 1) : 1;

 	switch (chs) {
 	default:
 	case 0:
 	case 2:
 		chanmask = 0x00;
 		break;
 	case 4:
 		chanmask = 0x08;
 		break;
 	case 6:
 		chanmask = 0x0b;
 		break;
 	case 8:
 		chanmask = 0x13;
 		break;
 	}
 	dataDCC1 = AC_DIG1_ENABLE | AC_DIG1_COPYRIGHT;
 	dataDCC2 = 0x2;

 	/* set the Audio InforFrame Channel Allocation */
 	snd_hda_codec_write(codec, 0x1, 0,
 			Nv_VERB_SET_Channel_Allocation, chanmask);

 	/* turn off SPDIF once; otherwise the IEC958 bits won't be updated */
 	if (codec->spdif_status_reset && (codec->spdif_ctls & AC_DIG1_ENABLE))
 		snd_hda_codec_write(codec,
 				Nv_Master_Convert_nid,
 				0,
 				AC_VERB_SET_DIGI_CONVERT_1,
 				codec->spdif_ctls & ~AC_DIG1_ENABLE & 0xff);

 	/* set the stream id */
 	snd_hda_codec_write(codec, Nv_Master_Convert_nid, 0,
 			AC_VERB_SET_CHANNEL_STREAMID, (stream_tag << 4) | 0x0);

 	/* set the stream format */
 	snd_hda_codec_write(codec, Nv_Master_Convert_nid, 0,
 			AC_VERB_SET_STREAM_FORMAT, format);

 	/* turn on again (if needed) */
 	/* enable and set the channel status audio/data flag */
 	if (codec->spdif_status_reset && (codec->spdif_ctls & AC_DIG1_ENABLE)) {
 		snd_hda_codec_write(codec,
 				Nv_Master_Convert_nid,
 				0,
 				AC_VERB_SET_DIGI_CONVERT_1,
 				codec->spdif_ctls & 0xff);
 		snd_hda_codec_write(codec,
 				Nv_Master_Convert_nid,
 				0,
 				AC_VERB_SET_DIGI_CONVERT_2, dataDCC2);
 	}

 	for (i = 0; i < 4; i++) {
 		if (chs == 2)
 			channel_id = 0;
 		else
 			channel_id = i * 2;

 		/* turn off SPDIF once;
 		 *otherwise the IEC958 bits won't be updated
 		 */
 		if (codec->spdif_status_reset &&
 		(codec->spdif_ctls & AC_DIG1_ENABLE))
 			snd_hda_codec_write(codec,
 				nvhdmi_convert_nids[i],
 				0,
 				AC_VERB_SET_DIGI_CONVERT_1,
 				codec->spdif_ctls & ~AC_DIG1_ENABLE & 0xff);
 		/* set the stream id */
 		snd_hda_codec_write(codec,
 				nvhdmi_convert_nids[i],
 				0,
 				AC_VERB_SET_CHANNEL_STREAMID,
 				(stream_tag << 4) | channel_id);
 		/* set the stream format */
 		snd_hda_codec_write(codec,
 				nvhdmi_convert_nids[i],
 				0,
 				AC_VERB_SET_STREAM_FORMAT,
 				format);
 		/* turn on again (if needed) */
 		/* enable and set the channel status audio/data flag */
 		if (codec->spdif_status_reset &&
 		(codec->spdif_ctls & AC_DIG1_ENABLE)) {
 			snd_hda_codec_write(codec,
 					nvhdmi_convert_nids[i],
 					0,
 					AC_VERB_SET_DIGI_CONVERT_1,
 					codec->spdif_ctls & 0xff);
 			snd_hda_codec_write(codec,
 					nvhdmi_convert_nids[i],
 					0,
 					AC_VERB_SET_DIGI_CONVERT_2, dataDCC2);
 		}
 	}

 	/* set the Audio Info Frame Checksum */
 	snd_hda_codec_write(codec, 0x1, 0,
 			Nv_VERB_SET_Info_Frame_Checksum,
 			(0x71 - chan - chanmask));

 	mutex_unlock(&codec->spdif_mutex);
 	return 0;
 }

 static int nvhdmi_dig_playback_pcm_prepare_2ch(struct hda_pcm_stream *hinfo,
 					struct hda_codec *codec,
 					unsigned int stream_tag,
 					unsigned int format,
 					struct snd_pcm_substream *substream)
 {
 	struct nvhdmi_spec *spec = codec->spec;
 	return snd_hda_multi_out_dig_prepare(codec, &spec->multiout, stream_tag,
 					format, substream);
 }

 static struct hda_pcm_stream nvhdmi_pcm_digital_playback_8ch = {
 	.substreams = 1,
 	.channels_min = 2,
 	.channels_max = 8,
 	.nid = Nv_Master_Convert_nid,
 	.rates = SNDRV_PCM_RATE_48000,
 	.maxbps = 16,
 	.formats = SNDRV_PCM_FMTBIT_S16_LE,
 	.ops = {
 		.open = nvhdmi_dig_playback_pcm_open,
 		.close = nvhdmi_dig_playback_pcm_close_8ch,
 		.prepare = nvhdmi_dig_playback_pcm_prepare_8ch
 	},
 };

 static struct hda_pcm_stream nvhdmi_pcm_digital_playback_2ch = {
 	.substreams = 1,
 	.channels_min = 2,
 	.channels_max = 2,
 	.nid = Nv_Master_Convert_nid,
 	.rates = SNDRV_PCM_RATE_48000,
 	.maxbps = 16,
 	.formats = SNDRV_PCM_FMTBIT_S16_LE,
 	.ops = {
 		.open = nvhdmi_dig_playback_pcm_open,
 		.close = nvhdmi_dig_playback_pcm_close_2ch,
 		.prepare = nvhdmi_dig_playback_pcm_prepare_2ch
 	},
 };

 static int nvhdmi_build_pcms_8ch(struct hda_codec *codec)
 {
 	struct nvhdmi_spec *spec = codec->spec;
 	struct hda_pcm *info = &spec->pcm_rec;

 	codec->num_pcms = 1;
 	codec->pcm_info = info;

 	info->name = "NVIDIA HDMI";
 	info->pcm_type = HDA_PCM_TYPE_HDMI;
 	info->stream[SNDRV_PCM_STREAM_PLAYBACK]
 					= nvhdmi_pcm_digital_playback_8ch;

 	return 0;
 }

 static int nvhdmi_build_pcms_2ch(struct hda_codec *codec)
 {
 	struct nvhdmi_spec *spec = codec->spec;
 	struct hda_pcm *info = &spec->pcm_rec;

 	codec->num_pcms = 1;
 	codec->pcm_info = info;

 	info->name = "NVIDIA HDMI";
 	info->pcm_type = HDA_PCM_TYPE_HDMI;
 	info->stream[SNDRV_PCM_STREAM_PLAYBACK]
 					= nvhdmi_pcm_digital_playback_2ch;

 	return 0;
 }

 static void nvhdmi_free(struct hda_codec *codec)
 {
 	kfree(codec->spec);
 }

 static struct hda_codec_ops nvhdmi_patch_ops_8ch = {
 	.build_controls = nvhdmi_build_controls,
 	.build_pcms = nvhdmi_build_pcms_8ch,
 	.init = nvhdmi_init,
 	.free = nvhdmi_free,
 };

 static struct hda_codec_ops nvhdmi_patch_ops_2ch = {
 	.build_controls = nvhdmi_build_controls,
 	.build_pcms = nvhdmi_build_pcms_2ch,
 	.init = nvhdmi_init,
 	.free = nvhdmi_free,
 };

 static int patch_nvhdmi_8ch(struct hda_codec *codec)
 {
 	struct nvhdmi_spec *spec;

 	spec = kzalloc(sizeof(*spec), GFP_KERNEL);
 	if (spec == NULL)
 		return -ENOMEM;

 	codec->spec = spec;

 	spec->multiout.num_dacs = 0;  /* no analog */
 	spec->multiout.max_channels = 8;
 	spec->multiout.dig_out_nid = Nv_Master_Convert_nid;

 	codec->patch_ops = nvhdmi_patch_ops_8ch;

 	return 0;
 }

 static int patch_nvhdmi_2ch(struct hda_codec *codec)
 {
 	struct nvhdmi_spec *spec;

 	spec = kzalloc(sizeof(*spec), GFP_KERNEL);
 	if (spec == NULL)
 		return -ENOMEM;

 	codec->spec = spec;

 	spec->multiout.num_dacs = 0;  /* no analog */
 	spec->multiout.max_channels = 2;
 	spec->multiout.dig_out_nid = Nv_Master_Convert_nid;

 	codec->patch_ops = nvhdmi_patch_ops_2ch;

 	return 0;
 }

 /*
  * patch entries
  */
 static struct hda_codec_preset snd_hda_preset_nvhdmi[] = {
 	{ .id = 0x10de0002, .name = "MCP78 HDMI", .patch = patch_nvhdmi_8ch },
 	{ .id = 0x10de0006, .name = "MCP78 HDMI", .patch = patch_nvhdmi_8ch },
 	{ .id = 0x10de0007, .name = "MCP7A HDMI", .patch = patch_nvhdmi_8ch },
 	{ .id = 0x10de0067, .name = "MCP67 HDMI", .patch = patch_nvhdmi_2ch },
 	{ .id = 0x10de8001, .name = "MCP73 HDMI", .patch = patch_nvhdmi_2ch },
 	{} /* terminator */
 };

 MODULE_ALIAS("snd-hda-codec-id:10de0002");
 MODULE_ALIAS("snd-hda-codec-id:10de0006");
 MODULE_ALIAS("snd-hda-codec-id:10de0007");
 MODULE_ALIAS("snd-hda-codec-id:10de0067");
 MODULE_ALIAS("snd-hda-codec-id:10de8001");

 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Nvidia HDMI HD-audio codec");

 static struct hda_codec_preset_list nvhdmi_list = {
 	.preset = snd_hda_preset_nvhdmi,
 	.owner = THIS_MODULE,
 };

 static int __init patch_nvhdmi_init(void)
 {
 	return snd_hda_add_codec_preset(&nvhdmi_list);
 }

 static void __exit patch_nvhdmi_exit(void)
 {
 	snd_hda_delete_codec_preset(&nvhdmi_list);
 }

 module_init(patch_nvhdmi_init)
 module_exit(patch_nvhdmi_exit)
	/*
	* Universal Interface for Intel High Definition Audio Codec
	*
	* HD audio interface patch for NVIDIA HDMI codecs
	*
	* Copyright (c) 2008 NVIDIA Corp. All rights reserved.
	* Copyright (c) 2008 Wei Ni <wni@nvidia.com>
	*
	*
	* This driver is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This driver 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.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*/

	#include <linux/init.h>
	#include <linux/delay.h>
	#include <linux/slab.h>
	#include <sound/core.h>
	#include "hda_codec.h"
	#include "hda_local.h"

	struct nvhdmi_spec {
	struct hda_multi_out multiout;

	struct hda_pcm pcm_rec;
	};

	#define Nv_VERB_SET_Channel_Allocation 0xF79
	#define Nv_VERB_SET_Info_Frame_Checksum 0xF7A
	#define Nv_VERB_SET_Audio_Protection_On 0xF98
	#define Nv_VERB_SET_Audio_Protection_Off 0xF99

	#define Nv_Master_Convert_nid 0x04
	#define Nv_Master_Pin_nid 0x05

	static hda_nid_t nvhdmi_convert_nids[4] = {
	/front, rear, clfe, rear_surr /
	0x6, 0x8, 0xa, 0xc,
	};

	static struct hda_verb nvhdmi_basic_init[] = {
	/* set audio protect on */
	{ 0x1, Nv_VERB_SET_Audio_Protection_On, 0x1},
	/* enable digital output on pin widget */
	{ 0x5, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT \| 0x5 },
	{ 0x7, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT \| 0x5 },
	{ 0x9, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT \| 0x5 },
	{ 0xb, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT \| 0x5 },
	{ 0xd, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT \| 0x5 },
	{} /* terminator */
	};

	/*
	* Controls
	*/
	static int nvhdmi_build_controls(struct hda_codec *codec)
	{
	struct nvhdmi_spec *spec = codec->spec;
	int err;

	err = snd_hda_create_spdif_out_ctls(codec, spec->multiout.dig_out_nid);
	if (err < 0)
	return err;

	return 0;
	}

	static int nvhdmi_init(struct hda_codec *codec)
	{
	snd_hda_sequence_write(codec, nvhdmi_basic_init);
	return 0;
	}

	/*
	* Digital out
	*/
	static int nvhdmi_dig_playback_pcm_open(struct hda_pcm_stream *hinfo,
	struct hda_codec *codec,
	struct snd_pcm_substream *substream)
	{
	struct nvhdmi_spec *spec = codec->spec;
	return snd_hda_multi_out_dig_open(codec, &spec->multiout);
	}

	static int nvhdmi_dig_playback_pcm_close_8ch(struct hda_pcm_stream *hinfo,
	struct hda_codec *codec,
	struct snd_pcm_substream *substream)
	{
	struct nvhdmi_spec *spec = codec->spec;
	int i;

	snd_hda_codec_write(codec, Nv_Master_Convert_nid,
	0, AC_VERB_SET_CHANNEL_STREAMID, 0);
	for (i = 0; i < 4; i++) {
	/* set the stream id */
	snd_hda_codec_write(codec, nvhdmi_convert_nids[i], 0,
	AC_VERB_SET_CHANNEL_STREAMID, 0);
	/* set the stream format */
	snd_hda_codec_write(codec, nvhdmi_convert_nids[i], 0,
	AC_VERB_SET_STREAM_FORMAT, 0);
	}

	return snd_hda_multi_out_dig_close(codec, &spec->multiout);
	}

	static int nvhdmi_dig_playback_pcm_close_2ch(struct hda_pcm_stream *hinfo,
	struct hda_codec *codec,
	struct snd_pcm_substream *substream)
	{
	struct nvhdmi_spec *spec = codec->spec;
	return snd_hda_multi_out_dig_close(codec, &spec->multiout);
	}

	static int nvhdmi_dig_playback_pcm_prepare_8ch(struct hda_pcm_stream *hinfo,
	struct hda_codec *codec,
	unsigned int stream_tag,
	unsigned int format,
	struct snd_pcm_substream *substream)
	{
	int chs;
	unsigned int dataDCC1, dataDCC2, chan, chanmask, channel_id;
	int i;

	mutex_lock(&codec->spdif_mutex);

	chs = substream->runtime->channels;
	chan = chs ? (chs - 1) : 1;

	switch (chs) {
	default:
	case 0:
	case 2:
	chanmask = 0x00;
	break;
	case 4:
	chanmask = 0x08;
	break;
	case 6:
	chanmask = 0x0b;
	break;
	case 8:
	chanmask = 0x13;
	break;
	}
	dataDCC1 = AC_DIG1_ENABLE \| AC_DIG1_COPYRIGHT;
	dataDCC2 = 0x2;

	/* set the Audio InforFrame Channel Allocation */
	snd_hda_codec_write(codec, 0x1, 0,
	Nv_VERB_SET_Channel_Allocation, chanmask);

	/* turn off SPDIF once; otherwise the IEC958 bits won't be updated */
	if (codec->spdif_status_reset && (codec->spdif_ctls & AC_DIG1_ENABLE))
	snd_hda_codec_write(codec,
	Nv_Master_Convert_nid,
	0,
	AC_VERB_SET_DIGI_CONVERT_1,
	codec->spdif_ctls & ~AC_DIG1_ENABLE & 0xff);

	/* set the stream id */
	snd_hda_codec_write(codec, Nv_Master_Convert_nid, 0,
	AC_VERB_SET_CHANNEL_STREAMID, (stream_tag << 4) \| 0x0);

	/* set the stream format */
	snd_hda_codec_write(codec, Nv_Master_Convert_nid, 0,
	AC_VERB_SET_STREAM_FORMAT, format);

	/* turn on again (if needed) */
	/* enable and set the channel status audio/data flag */
	if (codec->spdif_status_reset && (codec->spdif_ctls & AC_DIG1_ENABLE)) {
	snd_hda_codec_write(codec,
	Nv_Master_Convert_nid,
	0,
	AC_VERB_SET_DIGI_CONVERT_1,
	codec->spdif_ctls & 0xff);
	snd_hda_codec_write(codec,
	Nv_Master_Convert_nid,
	0,
	AC_VERB_SET_DIGI_CONVERT_2, dataDCC2);
	}

	for (i = 0; i < 4; i++) {
	if (chs == 2)
	channel_id = 0;
	else
	channel_id = i * 2;

	/* turn off SPDIF once;
	*otherwise the IEC958 bits won't be updated
	*/
	if (codec->spdif_status_reset &&
	(codec->spdif_ctls & AC_DIG1_ENABLE))
	snd_hda_codec_write(codec,
	nvhdmi_convert_nids[i],
	0,
	AC_VERB_SET_DIGI_CONVERT_1,
	codec->spdif_ctls & ~AC_DIG1_ENABLE & 0xff);
	/* set the stream id */
	snd_hda_codec_write(codec,
	nvhdmi_convert_nids[i],
	0,
	AC_VERB_SET_CHANNEL_STREAMID,
	(stream_tag << 4) \| channel_id);
	/* set the stream format */
	snd_hda_codec_write(codec,
	nvhdmi_convert_nids[i],
	0,
	AC_VERB_SET_STREAM_FORMAT,
	format);
	/* turn on again (if needed) */
	/* enable and set the channel status audio/data flag */
	if (codec->spdif_status_reset &&
	(codec->spdif_ctls & AC_DIG1_ENABLE)) {
	snd_hda_codec_write(codec,
	nvhdmi_convert_nids[i],
	0,
	AC_VERB_SET_DIGI_CONVERT_1,
	codec->spdif_ctls & 0xff);
	snd_hda_codec_write(codec,
	nvhdmi_convert_nids[i],
	0,
	AC_VERB_SET_DIGI_CONVERT_2, dataDCC2);
	}
	}

	/* set the Audio Info Frame Checksum */
	snd_hda_codec_write(codec, 0x1, 0,
	Nv_VERB_SET_Info_Frame_Checksum,
	(0x71 - chan - chanmask));

	mutex_unlock(&codec->spdif_mutex);
	return 0;
	}

	static int nvhdmi_dig_playback_pcm_prepare_2ch(struct hda_pcm_stream *hinfo,
	struct hda_codec *codec,
	unsigned int stream_tag,
	unsigned int format,
	struct snd_pcm_substream *substream)
	{
	struct nvhdmi_spec *spec = codec->spec;
	return snd_hda_multi_out_dig_prepare(codec, &spec->multiout, stream_tag,
	format, substream);
	}

	static struct hda_pcm_stream nvhdmi_pcm_digital_playback_8ch = {
	.substreams = 1,
	.channels_min = 2,
	.channels_max = 8,
	.nid = Nv_Master_Convert_nid,
	.rates = SNDRV_PCM_RATE_48000,
	.maxbps = 16,
	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	.ops = {
	.open = nvhdmi_dig_playback_pcm_open,
	.close = nvhdmi_dig_playback_pcm_close_8ch,
	.prepare = nvhdmi_dig_playback_pcm_prepare_8ch
	},
	};

	static struct hda_pcm_stream nvhdmi_pcm_digital_playback_2ch = {
	.substreams = 1,
	.channels_min = 2,
	.channels_max = 2,
	.nid = Nv_Master_Convert_nid,
	.rates = SNDRV_PCM_RATE_48000,
	.maxbps = 16,
	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	.ops = {
	.open = nvhdmi_dig_playback_pcm_open,
	.close = nvhdmi_dig_playback_pcm_close_2ch,
	.prepare = nvhdmi_dig_playback_pcm_prepare_2ch
	},
	};

	static int nvhdmi_build_pcms_8ch(struct hda_codec *codec)
	{
	struct nvhdmi_spec *spec = codec->spec;
	struct hda_pcm *info = &spec->pcm_rec;

	codec->num_pcms = 1;
	codec->pcm_info = info;

	info->name = "NVIDIA HDMI";
	info->pcm_type = HDA_PCM_TYPE_HDMI;
	info->stream[SNDRV_PCM_STREAM_PLAYBACK]
	= nvhdmi_pcm_digital_playback_8ch;

	return 0;
	}

	static int nvhdmi_build_pcms_2ch(struct hda_codec *codec)
	{
	struct nvhdmi_spec *spec = codec->spec;
	struct hda_pcm *info = &spec->pcm_rec;

	codec->num_pcms = 1;
	codec->pcm_info = info;

	info->name = "NVIDIA HDMI";
	info->pcm_type = HDA_PCM_TYPE_HDMI;
	info->stream[SNDRV_PCM_STREAM_PLAYBACK]
	= nvhdmi_pcm_digital_playback_2ch;

	return 0;
	}

	static void nvhdmi_free(struct hda_codec *codec)
	{
	kfree(codec->spec);
	}

	static struct hda_codec_ops nvhdmi_patch_ops_8ch = {
	.build_controls = nvhdmi_build_controls,
	.build_pcms = nvhdmi_build_pcms_8ch,
	.init = nvhdmi_init,
	.free = nvhdmi_free,
	};

	static struct hda_codec_ops nvhdmi_patch_ops_2ch = {
	.build_controls = nvhdmi_build_controls,
	.build_pcms = nvhdmi_build_pcms_2ch,
	.init = nvhdmi_init,
	.free = nvhdmi_free,
	};

	static int patch_nvhdmi_8ch(struct hda_codec *codec)
	{
	struct nvhdmi_spec *spec;

	spec = kzalloc(sizeof(*spec), GFP_KERNEL);
	if (spec == NULL)
	return -ENOMEM;

	codec->spec = spec;

	spec->multiout.num_dacs = 0; /* no analog */
	spec->multiout.max_channels = 8;
	spec->multiout.dig_out_nid = Nv_Master_Convert_nid;

	codec->patch_ops = nvhdmi_patch_ops_8ch;

	return 0;
	}

	static int patch_nvhdmi_2ch(struct hda_codec *codec)
	{
	struct nvhdmi_spec *spec;

	spec = kzalloc(sizeof(*spec), GFP_KERNEL);
	if (spec == NULL)
	return -ENOMEM;

	codec->spec = spec;

	spec->multiout.num_dacs = 0; /* no analog */
	spec->multiout.max_channels = 2;
	spec->multiout.dig_out_nid = Nv_Master_Convert_nid;

	codec->patch_ops = nvhdmi_patch_ops_2ch;

	return 0;
	}

	/*
	* patch entries
	*/
	static struct hda_codec_preset snd_hda_preset_nvhdmi[] = {
	{ .id = 0x10de0002, .name = "MCP78 HDMI", .patch = patch_nvhdmi_8ch },
	{ .id = 0x10de0006, .name = "MCP78 HDMI", .patch = patch_nvhdmi_8ch },
	{ .id = 0x10de0007, .name = "MCP7A HDMI", .patch = patch_nvhdmi_8ch },
	{ .id = 0x10de0067, .name = "MCP67 HDMI", .patch = patch_nvhdmi_2ch },
	{ .id = 0x10de8001, .name = "MCP73 HDMI", .patch = patch_nvhdmi_2ch },
	{} /* terminator */
	};

	MODULE_ALIAS("snd-hda-codec-id:10de0002");
	MODULE_ALIAS("snd-hda-codec-id:10de0006");
	MODULE_ALIAS("snd-hda-codec-id:10de0007");
	MODULE_ALIAS("snd-hda-codec-id:10de0067");
	MODULE_ALIAS("snd-hda-codec-id:10de8001");

	MODULE_LICENSE("GPL");
	MODULE_DESCRIPTION("Nvidia HDMI HD-audio codec");

	static struct hda_codec_preset_list nvhdmi_list = {
	.preset = snd_hda_preset_nvhdmi,
	.owner = THIS_MODULE,
	};

	static int __init patch_nvhdmi_init(void)
	{
	return snd_hda_add_codec_preset(&nvhdmi_list);
	}

	static void __exit patch_nvhdmi_exit(void)
	{
	snd_hda_delete_codec_preset(&nvhdmi_list);
	}

	module_init(patch_nvhdmi_init)
	module_exit(patch_nvhdmi_exit)