ALSA: Support NVIDIA MCP78/7A HDMI audio

Add NVIDIA HDMI HD-audio codec support in snd-hda-intel driver,
include NVIDIA MCP78/7A HDMI.
Signed-off-by: Wei Ni <wni@nvidia.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/pci/Kconfig

@@ -565,6 +565,14 @@ config SND_HDA_CODEC_ATIHDMI
 	  Say Y here to include ATI HDMI HD-audio codec support in
 	  snd-hda-intel driver, such as ATI RS600 HDMI.
 
+config SND_HDA_CODEC_NVHDMI
+	bool "Build NVIDIA HDMI HD-audio codec support"
+	depends on SND_HDA_INTEL
+	default y
+	help
+	  Say Y here to include NVIDIA HDMI HD-audio codec support in
+	  snd-hda-intel driver, such as NVIDIA MCP78 HDMI.
+
 config SND_HDA_CODEC_CONEXANT
 	bool "Build Conexant HD-audio codec support"
 	depends on SND_HDA_INTEL

sound/pci/hda/Makefile

@@ -15,5 +15,6 @@ snd-hda-intel-$(CONFIG_SND_HDA_CODEC_SI3054) += patch_si3054.o
 snd-hda-intel-$(CONFIG_SND_HDA_CODEC_ATIHDMI) += patch_atihdmi.o
 snd-hda-intel-$(CONFIG_SND_HDA_CODEC_CONEXANT) += patch_conexant.o
 snd-hda-intel-$(CONFIG_SND_HDA_CODEC_VIA) += patch_via.o
+snd-hda-intel-$(CONFIG_SND_HDA_CODEC_NVHDMI) += patch_nvhdmi.o
 
 obj-$(CONFIG_SND_HDA_INTEL) += snd-hda-intel.o

sound/pci/hda/hda_codec.c

@@ -93,6 +93,9 @@ static const struct hda_codec_preset *hda_preset_tables[] = {
 #endif
 #ifdef CONFIG_SND_HDA_CODEC_VIA
 	snd_hda_preset_via,
+#endif
+#ifdef CONFIG_SND_HDA_CODEC_NVHDMI
+	snd_hda_preset_nvhdmi,
 #endif
 	NULL
 };

sound/pci/hda/hda_patch.h

@@ -18,3 +18,5 @@ extern struct hda_codec_preset snd_hda_preset_atihdmi[];
 extern struct hda_codec_preset snd_hda_preset_conexant[];
 /* VIA codecs */
 extern struct hda_codec_preset snd_hda_preset_via[];
+/* NVIDIA HDMI codecs */
+extern struct hda_codec_preset snd_hda_preset_nvhdmi[];

sound/pci/hda/patch_nvhdmi.c

+/*
+ * 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;
+};
+
+static struct hda_verb nvhdmi_basic_init[] = {
+	/* enable digital output on pin widget */
+	{ 0x05, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT },
+	{} /* 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(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(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 = {
+	.substreams = 1,
+	.channels_min = 2,
+	.channels_max = 2,
+	.nid = 0x4, /* NID to query formats and rates and setup streams */
+	.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,
+		.prepare = nvhdmi_dig_playback_pcm_prepare
+	},
+};
+
+static int nvhdmi_build_pcms(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->stream[SNDRV_PCM_STREAM_PLAYBACK] = nvhdmi_pcm_digital_playback;
+
+	return 0;
+}
+
+static void nvhdmi_free(struct hda_codec *codec)
+{
+	kfree(codec->spec);
+}
+
+static struct hda_codec_ops nvhdmi_patch_ops = {
+	.build_controls = nvhdmi_build_controls,
+	.build_pcms = nvhdmi_build_pcms,
+	.init = nvhdmi_init,
+	.free = nvhdmi_free,
+};
+
+static int patch_nvhdmi(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 = 0x4; /* NID for copying analog to digital,
+					   * seems to be unused in pure-digital
+					   * case. */
+
+	codec->patch_ops = nvhdmi_patch_ops;
+
+	return 0;
+}
+
+/*
+ * patch entries
+ */
+struct hda_codec_preset snd_hda_preset_nvhdmi[] = {
+	{ .id = 0x10de0002, .name = "NVIDIA MCP78 HDMI", .patch = patch_nvhdmi },
+	{ .id = 0x10de0007, .name = "NVIDIA MCP7A HDMI", .patch = patch_nvhdmi },
+	{} /* terminator */
+};