Amlogic ALSA configuration file fixes (#134)

* Add Khadas VIM3 configuration for HAOS 9.5

* Use new driver name for ALSA configuration

With Linux kernel commit bc387887ae22 ("ASoC: meson: implement
driver_name for snd_soc_card in meson-card-utils") [1] the Meson ASoC
driver passes the driver name (seemingly derrived from device tree
"compatible") to ALSA. This then reflects in /proc/asound/cards, which
now lists "axg-sound-card", instead of ODROID-N2 (derrived from the
device tree "model"):

Since Linux 5.16+
  # cat  /proc/asound/cards
   0 [ODROIDN2       ]: axg-sound-card - ODROID-N2
                        ODROID-N2

Linux 5.15 and earlier:
  # cat /proc/asound/cards
   0 [ODROIDN2       ]: ODROID-N2 - ODROID-N2
                        ODROID-N2

It seems that this string is used to find the ALSA configuration in
/usr/share/alsa/cards/.

Note that the same string is used in Khadas VIM3. But since the two
configuration files are the same, this actually deduplicate things.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc387887ae22d6ed6439e83968b5be3443a8e57d

* Use new driver name for ALSA configuration for ODROID-C2

Similar to ODROID-N2, the driver name changed for ODROID-C2 as well.
Add a configuration file for the new driver name.

rootfs/usr/share/alsa/cards/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>
+
+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>
+
+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/axg-sound-card.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>
+
+axg-sound-card.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>
+
+axg-sound-card.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/gx-sound-card.conf

@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2018-present Team LibreELEC (https://libreelec.tv)
+
+<confdir:pcm/hdmi.conf>
+
+gx-sound-card.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
+}