ALSA: create hda_eld.c for ELD routines and proc interface

ELD handling routines can be shared by all HDMI codecs,
and they are large enough to make a standalone source file.
Signed-off-by: Wu Fengguang <wfg@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/Kconfig

@@ -582,6 +582,10 @@ config SND_HDA_CODEC_INTELHDMI
 	  Say Y here to include INTEL HDMI HD-audio codec support in
 	  snd-hda-intel driver, such as Eaglelake integrated HDMI.
 
+config SND_HDA_ELD
+	def_bool y
+	depends on SND_HDA_CODEC_INTELHDMI
+
 config SND_HDA_CODEC_CONEXANT
 	bool "Build Conexant HD-audio codec support"
 	depends on SND_HDA_INTEL

sound/pci/hda/Makefile

@@ -4,6 +4,7 @@ snd-hda-intel-y := hda_intel.o
 # designed to be individual modules
 snd-hda-intel-y += hda_codec.o
 snd-hda-intel-$(CONFIG_PROC_FS) += hda_proc.o
+snd-hda-intel-$(CONFIG_SND_HDA_ELD) += hda_eld.o
 snd-hda-intel-$(CONFIG_SND_HDA_HWDEP) += hda_hwdep.o
 snd-hda-intel-$(CONFIG_SND_HDA_INPUT_BEEP) += hda_beep.o
 snd-hda-intel-$(CONFIG_SND_HDA_GENERIC) += hda_generic.o

sound/pci/hda/hda_local.h

@@ -443,4 +443,45 @@ int snd_hda_check_amp_list_power(struct hda_codec *codec,
 #define get_amp_direction(kc)	(((kc)->private_value >> 18) & 0x1)
 #define get_amp_index(kc)	(((kc)->private_value >> 19) & 0xf)
 
+/*
+ * CEA Short Audio Descriptor data
+ */
+struct cea_sad {
+	int	channels;
+	int	format;		/* (format == 0) indicates invalid SAD */
+	int	rates;
+	int	sample_bits;	/* for LPCM */
+	int	max_bitrate;	/* for AC3...ATRAC */
+	int	profile;	/* for WMAPRO */
+};
+
+#define ELD_FIXED_BYTES	20
+#define ELD_MAX_MNL	16
+#define ELD_MAX_SAD	16
+
+/*
+ * ELD: EDID Like Data
+ */
+struct sink_eld {
+	int	eld_size;
+	int	baseline_len;
+	int	eld_ver;	/* (eld_ver == 0) indicates invalid ELD */
+	int	cea_edid_ver;
+	char	monitor_name[ELD_MAX_MNL + 1];
+	int	manufacture_id;
+	int	product_id;
+	u64	port_id;
+	int	support_hdcp;
+	int	support_ai;
+	int	conn_type;
+	int	aud_synch_delay;
+	int	spk_alloc;
+	int	sad_count;
+	struct cea_sad sad[ELD_MAX_SAD];
+};
+
+int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid);
+int snd_hdmi_get_eld(struct sink_eld *, struct hda_codec *, hda_nid_t);
+void snd_hdmi_show_eld(struct sink_eld *eld);
+
 #endif /* __SOUND_HDA_LOCAL_H */