ASoC: SOF: Add support for parsing the number of sink/source pins

Add support for parsing the number of sink/source pins
per widget from topology. They will be used to determine
the sink/source queue IDs during widget binding.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Chao Song <chao.song@linux.intel.com>
Suggested-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20221107085706.2550-2-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/sound/soc/sof/sof-audio.h b/sound/soc/sof/sof-audio.h
index 4284ea2f3a1f..dfca713f00df 100644
--- a/sound/soc/sof/sof-audio.h
+++ b/sound/soc/sof/sof-audio.h
@@ -23,6 +23,13 @@
 
 #define SOF_AUDIO_PCM_DRV_NAME	"sof-audio-component"
 
+/*
+ * The ipc4 firmware only supports up to 8 sink or source pins
+ * per widget, because only 3 bits are used for queue(pin) ID
+ * in ipc4 protocol.
+ */
+#define SOF_WIDGET_MAX_NUM_PINS	8
+
 /* max number of FE PCMs before BEs */
 #define SOF_BE_PCM_BASE		16
 
@@ -387,6 +394,14 @@ struct snd_sof_widget {
 	int num_tuples;
 	struct snd_sof_tuple *tuples;
 
+	/*
+	 * The allowed range for num_sink/source_pins is [0, SOF_WIDGET_MAX_NUM_PINS].
+	 * Widgets may have zero sink or source pins, for example the tone widget has
+	 * zero sink pins.
+	 */
+	u32 num_sink_pins;
+	u32 num_source_pins;
+
 	void *private;		/* core does not touch this */
 };