topology2: pipelines: Add a new pipeline

Add a new pipeline, mixout-gain-eqiir-eqfir, that uses the new alsa-utils
topology feature to allow extending existing pipeline definitions. This
new class extends the base class mixout-gain-dai-copier-playback class
by adding the eqiir & eqfir widgets along with the new routes.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

tools/topology/topology2/include/pipelines/cavs/mixout-gain-eqiir-eqfir-playback.conf

@@ -0,0 +1,102 @@
+#
+# BE playback pipeline: mixout-gain-eqiir-eqfir.
+# This pipeline is an extension of the mixout-gain-dai-copier-playback pipeline class
+#
+# All attributes defined herein are namespaced
+# by alsatplg to "Object.Pipeline.mixout-gain-eqiir-eqfir.N.attribute_name"
+#
+# Usage: mixout-gain-efx-dai-copier-playback pipeline object can be instantiated as:
+#
+# Object.Pipeline.mixout-gain-eqiir-eqfir."N" {
+# 	period		1000
+# 	time_domain	"timer"
+# }
+#
+# Where N is the unique pipeline ID within the same alsaconf node.
+#
+
+<include/components/eqiir.conf>
+<include/components/eqfir.conf>
+<platform/intel/efx-default.conf>
+<include/pipelines/cavs/mixout-gain-dai-copier-playback.conf>
+
+Class.Pipeline."mixout-gain-eqiir-eqfir" {
+	SubTreeCopy.baseclass {
+
+		# this class extends the mixout-gain-dai-copier-playback class definition
+		source "Class.Pipeline.mixout-gain-dai-copier-playback"
+
+		# target node is not defined which means that the new subtree will be copied to
+		# the parent node containing the SubTreeCopy node i.e in this case the
+		# Class.Pipeline.mixout-gain-eqiir-eqfir {} node.
+
+		# default copy type is to extend the base class ie the widgets and routes
+		# will be added to the existing list of widgets/routes in the base class
+
+		tree {
+			Object.Widget {
+				eqiir."1" {
+					num_input_audio_formats 1
+					num_output_audio_formats 1
+
+					# 32-bit 48KHz 2ch
+					Object.Base.input_audio_format [
+						{
+							in_bit_depth		32
+							in_valid_bit_depth	32
+						}
+					]
+					Object.Base.output_audio_format [
+						{
+							out_bit_depth		32
+							out_valid_bit_depth	32
+						}
+					]
+
+					Object.Control.bytes."1" {
+						IncludeByKey.EFX_IIR_PARAMS {
+							"passthrough" "include/components/eqiir/passthrough.conf"
+						}
+					}
+				}
+				eqfir."1" {
+					num_input_audio_formats 1
+					num_output_audio_formats 1
+
+					# 32-bit 48KHz 2ch
+					Object.Base.input_audio_format [
+						{
+							in_bit_depth		32
+							in_valid_bit_depth	32
+						}
+					]
+					Object.Base.output_audio_format [
+						{
+							out_bit_depth		32
+							out_valid_bit_depth	32
+						}
+					]
+
+					Object.Control.bytes."1" {
+						IncludeByKey.EFX_FIR_PARAMS {
+							"passthrough" "include/components/eqfir/passthrough.conf"
+						}
+					}
+				}
+			}
+
+			Object.Base {
+				!route [
+					{
+						source	gain.$index.1
+						sink	eqiir.$index.1
+					}
+					{
+						source	eqiir.$index.1
+						sink	eqfir.$index.1
+					}
+				]
+			}
+		}
+	}
+}