ASoC: SOF: ipc4-topology: Add new tokens for pipeline direction

Parse the pipeline direction from topology. The direction_valid token is
required for backward-compatibility with older topologies that may not
have the direction set for pipelines. This will be used when
setting up pipelines to check if a pipeline is in the same direction as
the requested params and skip those in the opposite direction like in
the case of echo reference capture pipelines during playback.

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

Author: ranj063

include/uapi/sound/sof/tokens.h

@@ -57,6 +57,8 @@
 #define SOF_TKN_SCHED_MEM_USAGE			208
 #define SOF_TKN_SCHED_USE_CHAIN_DMA		209
 #define SOF_TKN_SCHED_KCPS			210
+#define SOF_TKN_SCHED_DIRECTION			211
+#define SOF_TKN_SCHED_DIRECTION_VALID		212
 
 /* volume */
 #define SOF_TKN_VOLUME_RAMP_STEP_TYPE		250

sound/soc/sof/ipc4-topology.c

@@ -76,6 +76,10 @@ static const struct sof_topology_token ipc4_sched_tokens[] = {
 		offsetof(struct sof_ipc4_pipeline, core_id)},
 	{SOF_TKN_SCHED_PRIORITY, SND_SOC_TPLG_TUPLE_TYPE_WORD, get_token_u32,
 		offsetof(struct sof_ipc4_pipeline, priority)},
+	{SOF_TKN_SCHED_DIRECTION, SND_SOC_TPLG_TUPLE_TYPE_WORD, get_token_u32,
+		offsetof(struct sof_ipc4_pipeline, direction)},
+	{SOF_TKN_SCHED_DIRECTION, SND_SOC_TPLG_TUPLE_TYPE_BOOL, get_token_u16,
+		offsetof(struct sof_ipc4_pipeline, direction_valid)},
 };
 
 static const struct sof_topology_token pipeline_tokens[] = {
@@ -939,6 +943,10 @@ static int sof_ipc4_widget_setup_comp_pipeline(struct snd_sof_widget *swidget)
 
 	swidget->core = pipeline->core_id;
 	spipe->core_mask |= BIT(pipeline->core_id);
+	if (pipeline->direction_valid) {
+		spipe->direction = pipeline->direction;
+		spipe->direction_valid = true;
+	}
 
 	if (pipeline->use_chain_dma) {
 		dev_dbg(scomp->dev, "Set up chain DMA for %s\n", swidget->widget->name);
@@ -954,9 +962,9 @@ static int sof_ipc4_widget_setup_comp_pipeline(struct snd_sof_widget *swidget)
 		goto err;
 	}
 
-	dev_dbg(scomp->dev, "pipeline '%s': id %d, pri %d, core_id %u, lp mode %d\n",
+	dev_dbg(scomp->dev, "pipeline '%s': id %d, pri %d, core_id %u, lp mode %d direction %d\n",
 		swidget->widget->name, swidget->pipeline_id,
-		pipeline->priority, pipeline->core_id, pipeline->lp_mode);
+		pipeline->priority, pipeline->core_id, pipeline->lp_mode, pipeline->direction);
 
 	swidget->private = pipeline;
 

sound/soc/sof/ipc4-topology.h

@@ -150,6 +150,8 @@ struct sof_ipc4_copier_config_set_sink_format {
  * @use_chain_dma: flag to indicate if the firmware shall use chained DMA
  * @msg: message structure for pipeline
  * @skip_during_fe_trigger: skip triggering this pipeline during the FE DAI trigger
+ * @direction_valid: flag indicating if valid direction is set in topology
+ * @direction: pipeline direction set in topology if direction_valid is true
  */
 struct sof_ipc4_pipeline {
 	uint32_t priority;
@@ -160,6 +162,8 @@ struct sof_ipc4_pipeline {
 	bool use_chain_dma;
 	struct sof_ipc4_msg msg;
 	bool skip_during_fe_trigger;
+	bool direction_valid;
+	u32 direction;
 };
 
 /**

sound/soc/sof/sof-audio.h

@@ -512,6 +512,9 @@ struct snd_sof_widget {
  * @complete: flag used to indicate that pipeline set up is complete.
  * @core_mask: Mask containing target cores for all modules in the pipeline
  * @list: List item in sdev pipeline_list
+ * @direction_valid: flag indicating if the direction is set in topology
+ * @direction: pipeline direction set in topology, valid is direction_valid is true
+ *
  */
 struct snd_sof_pipeline {
 	struct snd_sof_widget *pipe_widget;
@@ -520,6 +523,8 @@ struct snd_sof_pipeline {
 	int complete;
 	unsigned long core_mask;
 	struct list_head list;
+	bool direction_valid;
+	u32 direction;
 };
 
 /* ASoC SOF DAPM route */