ALSA: Add definitions for CEA-861 Audio InfoFrames

Along with the IEC-60958 channel status word, CEA-861 Audio InfoFrames
are used in HDMI and DisplayPort to describe the parameters of the audio
stream. Hence, drivers for such devices may use these definitions to, for
instance, fill a CEA-861 data structure and pass it to a display driver
to configure an IP.

Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/include/sound/asound.h b/include/sound/asound.h
index a2e4ff5..0876a1e 100644 (file)
--- a/include/sound/asound.h
+++ b/include/sound/asound.h
@@ -70,6 +70,20 @@ struct snd_aes_iec958 {
 
 /****************************************************************************
  *                                                                          *
+ *        CEA-861 Audio InfoFrame. Used in HDMI and DisplayPort                    *
+ *                                                                          *
+ ****************************************************************************/
+
+struct snd_cea_861_aud_if {
+       unsigned char db1_ct_cc; /* coding type and channel count */
+       unsigned char db2_sf_ss; /* sample frequency and size */
+       unsigned char db3; /* not used, all zeros */
+       unsigned char db4_ca; /* channel allocation code */
+       unsigned char db5_dminh_lsv; /* downmix inhibit & level-shit values */
+};
+
+/****************************************************************************
+ *                                                                          *
  *      Section for driver hardware dependent interface - /dev/snd/hw?      *
  *                                                                          *
  ****************************************************************************/

diff --git a/include/sound/asoundef.h b/include/sound/asoundef.h
index 20ebf32..bb05c02 100644 (file)
--- a/include/sound/asoundef.h
+++ b/include/sound/asoundef.h
@@ -170,6 +170,47 @@
 #define IEC958_AES5_CON_CGMSA_COPYNOMORE (2<<0)        /* condition not be used */
 #define IEC958_AES5_CON_CGMSA_COPYNEVER        (3<<0)  /* no copying is permitted */
 
+/****************************************************************************
+ *                                                                          *
+ *        CEA-861 Audio InfoFrame. Used in HDMI and DisplayPort                    *
+ *                                                                          *
+ ****************************************************************************/
+#define CEA861_AUDIO_INFOFRAME_DB1CC           (7<<0) /* mask - channel count */
+#define CEA861_AUDIO_INFOFRAME_DB1CT           (0xf<<4) /* mask - coding type */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM (0<<4) /* refer to stream */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_IEC60958  (1<<4) /* IEC-60958 L-PCM */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_AC3       (2<<4) /* AC-3 */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_MPEG1     (3<<4) /* MPEG1 Layers 1 & 2 */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_MP3       (4<<4) /* MPEG1 Layer 3 */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_MPEG2_MULTICH (5<<4) /* MPEG2 Multichannel */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_AAC       (6<<4) /* AAC */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_DTS       (7<<4) /* DTS */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_ATRAC     (8<<4) /* ATRAC */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_ONEBIT    (9<<4) /* One Bit Audio */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_DOLBY_DIG_PLUS (10<<4) /* Dolby Digital + */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_DTS_HD    (11<<4) /* DTS-HD */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_MAT       (12<<4) /* MAT (MLP) */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_DST       (13<<4) /* DST */
+#define CEA861_AUDIO_INFOFRAME_DB1CT_WMA_PRO   (14<<4) /* WMA Pro */
+#define CEA861_AUDIO_INFOFRAME_DB2SF           (7<<2) /* mask - sample frequency */
+#define CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM (0<<2) /* refer to stream */
+#define CEA861_AUDIO_INFOFRAME_DB2SF_32000     (1<<2) /* 32kHz */
+#define CEA861_AUDIO_INFOFRAME_DB2SF_44100     (2<<2) /* 44.1kHz */
+#define CEA861_AUDIO_INFOFRAME_DB2SF_48000     (3<<2) /* 48kHz */
+#define CEA861_AUDIO_INFOFRAME_DB2SF_88200     (4<<2) /* 88.2kHz */
+#define CEA861_AUDIO_INFOFRAME_DB2SF_96000     (5<<2) /* 96kHz */
+#define CEA861_AUDIO_INFOFRAME_DB2SF_176400    (6<<2) /* 176.4kHz */
+#define CEA861_AUDIO_INFOFRAME_DB2SF_192000    (7<<2) /* 192kHz */
+#define CEA861_AUDIO_INFOFRAME_DB2SS           (3<<0) /* mask - sample size */
+#define CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM (0<<0) /* refer to stream */
+#define CEA861_AUDIO_INFOFRAME_DB2SS_16BIT     (1<<0) /* 16 bits */
+#define CEA861_AUDIO_INFOFRAME_DB2SS_20BIT     (2<<0) /* 20 bits */
+#define CEA861_AUDIO_INFOFRAME_DB2SS_24BIT     (3<<0) /* 24 bits */
+#define CEA861_AUDIO_INFOFRAME_DB5_DM_INH      (1<<7) /* mask - inhibit downmixing */
+#define CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PERMITTED (0<<7) /* stereo downmix permitted */
+#define CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED (1<<7) /* stereo downmis prohibited */
+#define CEA861_AUDIO_INFOFRAME_DB5_LSV         (0xf<<3) /* mask - level-shift values */
+
 /*****************************************************************************
  *                                                                           *
  *                            MIDI v1.0 interface                            *