Tools: Topology2: Add support for ALSA enum control

This patch adds to definitions in common.conf a new class "text"
to support the enum control values.

Signed-off-by: Ranjani Sridharan <[email protected]>
Signed-off-by: Seppo Ingalsuo <[email protected]>

tools/topology/topology2/include/controls/common.conf

@@ -182,3 +182,22 @@ Class.Base."tlv" {
 		unique	"instance"
 	}
 }
+
+Class.Base."text" {
+	DefineAttribute."instance" {}
+
+	DefineAttribute."name" {
+		type "string"
+	}
+
+	attributes {
+		!constructor [
+			"name"
+		]
+		#
+		# text objects instantiated within the same alsaconf node must have unique
+		# instance attribute
+		#
+		unique	"instance"
+	}
+}

tools/topology/topology2/include/controls/enum.conf

@@ -0,0 +1,97 @@
+#
+# Enum kcontrol class. All attributes defined herein are namespaced
+# by alsatplg to "Object.Control.enum.N.attribute_name"
+#
+# Usage: this component can be used by instantiating it in the parent object. i.e.
+#
+#	Object.Control.enum."N" {
+#		index	1
+#		name	"Master Playback Enum Control"
+#			Object.Base.text.1 {
+#				name "mytext"
+#				!values [
+#					"One"
+#					"Two"
+#					"Three"
+#				]
+#			}
+#			Object.Base.channel.1 {
+#				name "fc"
+#				shift 0
+#				reg 0
+#			}
+#			Object.Base.ops."ctl" {
+#				info "enum"
+#				get "257"
+#				put "257"
+#			}
+#	}
+#
+# Where N is the unique instance number for the buffer object within the same alsaconf node.
+# The enum control object should also include the ops, channels and tlv objects in the object
+# instance
+
+<include/controls/common.conf>
+
+Class.Control."enum" {
+	#
+	# Pipeline ID for the enum object
+	#
+	DefineAttribute."index" {}
+
+	#
+	# Instance of enum object in the same alsaconf node
+	#
+	DefineAttribute."instance" {}
+
+	#
+	# Enum name. A enum object is included in the built topology only if it is given a
+	# name
+	#
+	DefineAttribute."name" {
+		type	"string"
+	}
+
+	#
+	# access control for enum
+	#
+	DefineAttribute."access" {
+		type	"compound"
+		constraints {
+			!valid_values [
+				"read_write"
+				"tlv_read_write"
+				"read"
+				"write"
+				"volatile"
+				"tlv_read"
+				"tlv_write"
+				"tlv_command"
+				"inactive"
+				"lock"
+				"owner"
+				"tlv_callback"
+			]
+		}
+	}
+
+	attributes {
+		#
+		# The Enum object name would be constructed using the index and instance arguments.
+		# For ex: "enum.1.1" or "enum.10.2" etc.
+		#
+		!constructor [
+			"index"
+			"instance"
+		]
+		!mandatory [
+			name
+		]
+		#
+		# enum control objects instantiated within the same alsaconf node must have unique
+		# index attribute
+		#
+		unique	"instance"
+	}
+
+}