ASoC: SOF: ipc4-loader/topology: Query the CPC value from manifest

The manifest's firmware module configuration section contains the measured
CPC values along with a matching IBS/OBS values.

The CPC can be looked up by looking for a matching IBS/OBS entry.
In case of multiple matches we will use the highest CPC value.

If there is no mod_cfg or no CPC value (all 0) or no match was found then
print warning message and use 0 as CPC value.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>

sound/soc/sof/ipc4-loader.c

@@ -423,6 +423,71 @@ int sof_ipc4_reload_fw_libraries(struct snd_sof_dev *sdev)
 	return ret;
 }
 
+/**
+ * sof_ipc4_update_cpc_from_manifest - Update the cpc in base config from manifest
+ * @sdev: SOF device
+ * @fw_module: pointer struct sof_ipc4_fw_module to parse
+ * @basecfg: Pointer to the base_config to update
+ */
+void sof_ipc4_update_cpc_from_manifest(struct snd_sof_dev *sdev,
+				       struct sof_ipc4_fw_module *fw_module,
+				       struct sof_ipc4_base_module_cfg *basecfg)
+{
+	const struct sof_man4_module_config *fw_mod_cfg;
+	u32 cpc_pick = 0;
+	u32 max_cpc = 0;
+	const char *msg;
+	int i;
+
+	if (!fw_module->fw_mod_cfg) {
+		msg = "No mod_cfg available for CPC lookup in the firmware file's manifest";
+		goto no_cpc;
+	}
+
+	/*
+	 * Find the best matching (highest) CPC value based on the module's
+	 * IBS/OBS configuration inferred from the audio format selection.
+	 *
+	 * The CPC value in each module config entry has been measured and
+	 * recorded as a IBS/OBS/CPC triplet and stored in the firmware file's
+	 * manifest
+	 */
+	fw_mod_cfg = fw_module->fw_mod_cfg;
+	for (i = 0; i < fw_module->man4_module_entry.cfg_count; i++) {
+		if (basecfg->obs == fw_mod_cfg[i].obs &&
+		    basecfg->ibs == fw_mod_cfg[i].ibs &&
+		    cpc_pick < fw_mod_cfg[i].cpc)
+			cpc_pick = fw_mod_cfg[i].cpc;
+
+		if (max_cpc < fw_mod_cfg[i].cpc)
+			max_cpc = fw_mod_cfg[i].cpc;
+	}
+
+	basecfg->cpc = cpc_pick;
+
+	/* We have a matching configuration for CPC */
+	if (basecfg->cpc)
+		return;
+
+	/*
+	 * No matching IBS/OBS found, the firmware manifest is missing
+	 * information in the module's module configuration table.
+	 */
+	if (!max_cpc)
+		msg = "No CPC value available in the firmware file's manifest";
+	else if (!cpc_pick)
+		msg = "No CPC match in the firmware file's manifest";
+
+no_cpc:
+	dev_warn(sdev->dev, "%s (UUID: %pUL): %s (ibs/obs: %u/%u)\n",
+		 fw_module->man4_module_entry.name,
+		 &fw_module->man4_module_entry.uuid, msg, basecfg->ibs,
+		 basecfg->obs);
+	dev_warn_once(sdev->dev, "Please try to update the firmware.\n");
+	dev_warn_once(sdev->dev, "If the issue persists, file a bug at\n");
+	dev_warn_once(sdev->dev, "https://github.com/thesofproject/sof/issues/\n");
+}
+
 const struct sof_ipc_fw_loader_ops ipc4_loader_ops = {
 	.validate = sof_ipc4_validate_firmware,
 	.parse_ext_manifest = sof_ipc4_fw_parse_basefw_ext_man,

sound/soc/sof/ipc4-priv.h

@@ -114,4 +114,10 @@ int sof_ipc4_query_fw_configuration(struct snd_sof_dev *sdev);
 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 sof_ipc4_base_module_cfg;
+void sof_ipc4_update_cpc_from_manifest(struct snd_sof_dev *sdev,
+				       struct sof_ipc4_fw_module *fw_module,
+				       struct sof_ipc4_base_module_cfg *basecfg);
+
 #endif

sound/soc/sof/ipc4-topology.c

@@ -966,6 +966,13 @@ sof_ipc4_update_resource_usage(struct snd_sof_dev *sdev, struct snd_sof_widget *
 	pipe_widget = swidget->spipe->pipe_widget;
 	pipeline = pipe_widget->private;
 	pipeline->mem_usage += total;
+
+	/* Update base_config->cpc from the module manifest */
+	sof_ipc4_update_cpc_from_manifest(sdev, fw_module, base_config);
+
+	dev_dbg(sdev->dev, "%s: ibs / obs / cpc: %u / %u / %u\n",
+		swidget->widget->name, base_config->ibs, base_config->obs,
+		base_config->cpc);
 }
 
 static int sof_ipc4_widget_assign_instance_id(struct snd_sof_dev *sdev,