conf/cards: add VC4-HDMI card

Add a conf file for the VC4-HDMI sound card.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

src/conf/cards/Makefile.am

@@ -51,6 +51,7 @@ cfg_files = aliases.conf \
 	TRID4DWAVENX.conf \
 	USB-Audio.conf \
 	YMF744.conf \
+	vc4-hdmi.conf \
 	VIA686A.conf \
 	VIA8233.conf \
 	VIA8233A.conf \

src/conf/cards/aliases.conf

@@ -56,6 +56,7 @@ AV200 cards.CMI8788
 CMI8786 cards.CMI8788
 CMI8787 cards.CMI8788
 pistachio cards.pistachio-card
+VC4-HDMI cards.vc4-hdmi
 
 <confdir:pcm/default.conf>
 <confdir:pcm/dmix.conf>

src/conf/cards/vc4-hdmi.conf

@@ -0,0 +1,64 @@
+#
+# Configuration for the VC4-HDMI sound card using software IEC958
+# subframe conversion
+#
+
+<confdir:pcm/front.conf>
+
+vc4-hdmi.pcm.front.0 {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+	type hw
+	card $CARD
+}
+
+# default with dmix
+vc4-hdmi.pcm.default {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+	type asym
+	playback.pcm {
+		type plug
+		slave.pcm {
+			@func concat
+			strings [ "dmix:" $CARD ]
+		}
+	}
+}
+
+<confdir:pcm/iec958.conf>
+
+vc4-hdmi.pcm.iec958.0 {
+	@args [ CARD AES0 AES1 AES2 AES3 ]
+	@args.CARD {
+		type string
+	}
+	@args.AES0 {
+		type integer
+	}
+	@args.AES1 {
+		type integer
+	}
+	@args.AES2 {
+		type integer
+	}
+	@args.AES3 {
+		type integer
+	}
+	type iec958
+	slave {
+		format IEC958_SUBFRAME_LE
+		pcm {
+			type plug
+			slave.pcm {
+				type hw
+				card $CARD
+			}
+		}
+	}
+	status [ $AES0 $AES1 $AES2 $AES3 ]
+}