[ALSA] Add Conexant audio support to the HD Audio driver

This driver adds limited support for the Conexant 5045 and 5047 HD Audio
codecs.  Some issues still need to be resolved.  The code is based
primarily on code from the Analog Devices AD1981 support and the Realtek
ALC260 support.  Some code came from the original code developed by Alex
Pototskiy (see alsa bugtracker 2485).
Signed-off-by: Tobin Davis <tdavis@dsl-only.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

Documentation/sound/alsa/ALSA-Configuration.txt

@@ -862,6 +862,20 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
 	  laptop	3-jack with hp-jack automute
 	  laptop-dig	ditto with SPDIF
 	  auto		auto-config reading BIOS (default)
+	
+	Conexant 5045
+	  laptop	Laptop config 
+	  test		for testing/debugging purpose, almost all controls
+			can be adjusted.  Appearing only when compiled with
+			$CONFIG_SND_DEBUG=y
+
+	Conexant 5047
+	  laptop	Basic Laptop config 
+	  laptop-hp	Laptop config for some HP models (subdevice 30A5)
+	  laptop-eapd	Laptop config with EAPD support
+	  test		for testing/debugging purpose, almost all controls
+			can be adjusted.  Appearing only when compiled with
+			$CONFIG_SND_DEBUG=y
 
 	STAC9200/9205/9220/9221/9254
 	  ref		Reference board

sound/pci/hda/Makefile

 snd-hda-intel-objs := hda_intel.o
-snd-hda-codec-objs := hda_codec.o hda_generic.o patch_realtek.o patch_cmedia.o patch_analog.o patch_sigmatel.o patch_si3054.o patch_atihdmi.o
+snd-hda-codec-objs := hda_codec.o \
+	hda_generic.o \
+	patch_realtek.o \
+	patch_cmedia.o \
+	patch_analog.o \
+	patch_sigmatel.o \
+	patch_si3054.o \
+	patch_atihdmi.o \
+	patch_conexant.o
 ifdef CONFIG_PROC_FS
 snd-hda-codec-objs += hda_proc.o
 endif

sound/pci/hda/hda_patch.h

@@ -14,6 +14,8 @@ extern struct hda_codec_preset snd_hda_preset_sigmatel[];
 extern struct hda_codec_preset snd_hda_preset_si3054[];
 /* ATI HDMI codecs */
 extern struct hda_codec_preset snd_hda_preset_atihdmi[];
+/* Conexant audio codec */
+extern struct hda_codec_preset snd_hda_preset_conexant[];
 
 static const struct hda_codec_preset *hda_preset_tables[] = {
 	snd_hda_preset_realtek,
@@ -22,5 +24,6 @@ static const struct hda_codec_preset *hda_preset_tables[] = {
 	snd_hda_preset_sigmatel,
 	snd_hda_preset_si3054,
 	snd_hda_preset_atihdmi,
+	snd_hda_preset_conexant,
 	NULL
 };