Merge pull request #4113 from jernejsk/a20_hdmi

Allwinner: Enable A20 HDMI audio

projects/Allwinner/devices/A20/filesystem/usr/share/alsa/cards/sun4i-hdmi.conf

@@ -0,0 +1,34 @@
+#
+# Configuration for HDMI
+#
+
+<confdir:pcm/hdmi.conf>
+
+sun4i-hdmi.pcm.hdmi.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 hooks
+	slave.pcm {
+		type hw
+		card $CARD
+		device 0
+	}
+	hooks.0 {
+		type ctl_elems
+		hook_args [
+			{
+				interface MIXER
+				name "IEC958 Playback Default"
+				lock true
+				preserve true
+				optional true
+				value [ $AES0 $AES1 $AES2 $AES3 ]
+			}
+		]
+	}
+	hint.device 0
+}