ASoC: SOF: ipc4-topology: Helper to find an swidget by module/instance id

The sof_ipc4_find_swidget_by_ids() can be used to find the swidget of a
module instance.
The lookup parameters are the module_id and the instance_id.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20231124150853.18648-2-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/ipc4-priv.h

@@ -115,6 +115,9 @@ int sof_ipc4_reload_fw_libraries(struct snd_sof_dev *sdev);
 struct sof_ipc4_fw_module *sof_ipc4_find_module_by_uuid(struct snd_sof_dev *sdev,
 							const guid_t *uuid);
 
+struct snd_sof_widget *sof_ipc4_find_swidget_by_ids(struct snd_sof_dev *sdev,
+						    u32 module_id, int instance_id);
+
 struct sof_ipc4_base_module_cfg;
 void sof_ipc4_update_cpc_from_manifest(struct snd_sof_dev *sdev,
 				       struct sof_ipc4_fw_module *fw_module,

sound/soc/sof/ipc4-topology.c

@@ -167,6 +167,26 @@ static const struct sof_token_info ipc4_token_list[SOF_TOKEN_COUNT] = {
 	[SOF_SRC_TOKENS] = {"SRC tokens", src_tokens, ARRAY_SIZE(src_tokens)},
 };
 
+struct snd_sof_widget *sof_ipc4_find_swidget_by_ids(struct snd_sof_dev *sdev,
+						    u32 module_id, int instance_id)
+{
+	struct snd_sof_widget *swidget;
+
+	list_for_each_entry(swidget, &sdev->widget_list, list) {
+		struct sof_ipc4_fw_module *fw_module = swidget->module_info;
+
+		/* Only active module instances have valid instance_id */
+		if (!swidget->use_count)
+			continue;
+
+		if (fw_module && fw_module->man4_module_entry.id == module_id &&
+		    swidget->instance_id == instance_id)
+			return swidget;
+	}
+
+	return NULL;
+}
+
 static void sof_ipc4_dbg_audio_format(struct device *dev, struct sof_ipc4_pin_format *pin_fmt,
 				      int num_formats)
 {