ASoC: SOF: ipc4-loader: save FW version info to debugfs

To check loaded FW version:

$ hexdump -C /sys/kernel/debug/sof/fw_version
00000000  02 00 07 00 63 00 01 00  00 00 00 00 00 00 00 00  |....c...........|
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://msgid.link/r/20240402145959.172619-2-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/ipc4-loader.c

@@ -80,6 +80,14 @@ static ssize_t sof_ipc4_fw_parse_ext_man(struct snd_sof_dev *sdev,
 	dev_dbg(sdev->dev, "Header length: %u, module count: %u\n",
 		fw_header->len, fw_header->num_module_entries);
 
+	/* copy the fw_version of basefw into debugfs at first boot */
+	if (fw == sdev->basefw.fw) {
+		sdev->fw_version.major = fw_header->major_version;
+		sdev->fw_version.minor = fw_header->minor_version;
+		sdev->fw_version.micro = fw_header->hotfix_version;
+		sdev->fw_version.build = fw_header->build_version;
+	}
+
 	fw_lib->modules = devm_kmalloc_array(sdev->dev, fw_header->num_module_entries,
 					     sizeof(*fw_module), GFP_KERNEL);
 	if (!fw_lib->modules)