topology2: components: pipeline: Add direction attribute

Add a new token for pipeline direction and a new atttribute for the
pipeline component. This change is required to implement the firmware
based echo reference feature to inform the kernel of the pipeline
direction in order for it to make a decision on which pipelines to set
up when the echo reference capture pipeline is set up.

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

Author: ranj063

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

@@ -84,6 +84,7 @@ Object.Base.VendorToken {
 		lp_mode		207
 		use_chain_dma		209
 		kcps			210
+		direction		211
 	}
 
 	"9" {

tools/topology/topology2/include/components/pipeline.conf

@@ -102,6 +102,21 @@ Class.Widget."pipeline" {
 		}
 	}
 
+	DefineAttribute."direction" {
+		type	"string"
+		token_ref	"scheduler.word"
+		constraints {
+			!valid_values [
+				"playback"
+				"capture"
+			]
+			!tuple_values [
+				0
+				1
+			]
+		}
+	}
+
 	# Skip setting up the pipeline in the DSP in the case of chained DMA mode
 	DefineAttribute."use_chain_dma" {
 		type	"string"