Add Khadas VIM3 support (#84)

* Add Khadas VIM3 support

Add sound configuration for Khadas VIM3. Currently only HDMI supported.
This requires access to device tree in sysfs.

* Add Khadas VIM3 specific config

* Add ODROID-N2 configuration for newer HAOS releases

Author: agners

rootfs/usr/bin/soundconfig

@@ -119,29 +119,38 @@ mixer $card 'Power Amplifier Mute' on
 mixer $card Headphone 0db on
 mixer $card 'AIF1 Slot 0 Digital DAC' on
 
-# Amlogic G12 HDMI to PCM0
-mixer $card 'FRDDR_A SINK 1 SEL' 'OUT 1'
-mixer $card 'FRDDR_A SRC 1 EN' on
-mixer $card 'TDMOUT_B SRC SEL' 'IN 0'
-mixer $card 'TOHDMITX I2S SRC' 'I2S B'
-mixer $card 'TOHDMITX' on
-
-# Amlogic G12 DAC to PCM1
-mixer $card 'FRDDR_B SINK 1 SEL' 'OUT 2'
-mixer $card 'FRDDR_B SRC 1 EN' on
-mixer $card 'TDMOUT_C SRC SEL' 'IN 1'
-mixer $card 'TOACODEC SRC' 'I2S C'
-mixer $card 'TOACODEC OUT EN' on
-mixer $card 'ACODEC' 100%
-
 # Amlogic GX HDMI and S/PDIF
 mixer $card 'AIU HDMI CTRL SRC' 'I2S'
 mixer $card 'AIU SPDIF SRC SEL' 'SPDIF'
 
 case ${device_id} in
-    pcm5121sound)
+  pcm5121sound)
     # Yellow - set Analogue Gain to -6dB for line-out circuit
     mixer $card 'Analogue' 0
-fi
+    ;;
+  ODROIDN2)
+    # Amlogic G12 HDMI to PCM0
+    mixer $card 'FRDDR_A SINK 1 SEL' 'OUT 1'
+    mixer $card 'FRDDR_A SRC 1 EN' on
+    mixer $card 'TDMOUT_B SRC SEL' 'IN 0'
+    mixer $card 'TOHDMITX I2S SRC' 'I2S B'
+    mixer $card 'TOHDMITX' on
+
+    # Amlogic G12 DAC to PCM1
+    mixer $card 'FRDDR_B SINK 1 SEL' 'OUT 2'
+    mixer $card 'FRDDR_B SRC 1 EN' on
+    mixer $card 'TDMOUT_C SRC SEL' 'IN 1'
+    mixer $card 'TOACODEC SRC' 'I2S C'
+    mixer $card 'TOACODEC OUT EN' on
+    mixer $card 'ACODEC' 100%
+    ;;
+  G12BKHADASVIM3)
+    mixer $card 'FRDDR_A SINK 1 SEL' 'OUT 0'
+    mixer $card 'FRDDR_A SRC 1 EN' on
+    mixer $card 'TDMOUT_A SRC SEL' 'IN 0'
+    mixer $card 'TOHDMITX' on
+    mixer $card 'TOHDMITX I2S SRC' 'I2S A'
+    ;;
+esac
 
 exit 0

rootfs/usr/share/alsa/cards/G12B-KHADAS-VIM3.conf

@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2020 Team LibreELEC (https://libreelec.tv)
+# Copyright (C) 2020-present Home Assistant (https://home-assistant.io)
+
+<confdir:pcm/hdmi.conf>
+
+G12B-KHADAS-VIM3.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
+		subdevice 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
+}
+
+<confdir:pcm/front.conf>
+
+G12B-KHADAS-VIM3.pcm.front.0 {
+        @args [ CARD ]
+	@args.CARD { type string }
+	type softvol
+	slave.pcm {
+		type hw
+		card $CARD
+                device 1
+		subdevice 0
+	}
+	control {
+		name "Onboard DAC output"
+		card $CARD
+	}
+}

rootfs/usr/share/alsa/cards/ODROID-N2.conf

@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2020 Team LibreELEC (https://libreelec.tv)
+# Copyright (C) 2020-present Home Assistant (https://home-assistant.io)
+
+<confdir:pcm/hdmi.conf>
+
+ODROID-N2.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
+		subdevice 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
+}
+
+<confdir:pcm/front.conf>
+
+ODROID-N2.pcm.front.0 {
+        @args [ CARD ]
+	@args.CARD { type string }
+	type softvol
+	slave.pcm {
+		type hw
+		card $CARD
+                device 1
+		subdevice 0
+	}
+	control {
+		name "Onboard DAC output"
+		card $CARD
+	}
+}