ASoC: SOF: ext_manifest: parse firmware version

The firmware version can be extracted from the extended
manifest content. This information known at build time
does not need to be provided in a mailbox.
Signed-off-by: Karol Trzcinski <karolx.trzcinski@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20200520165911.21696-4-kai.vehmanen@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/sof/ext_manifest.h

@@ -19,6 +19,7 @@
 #include <linux/bits.h>
 #include <linux/compiler.h>
 #include <linux/types.h>
+#include <sound/sof/info.h>
 
 /* In ASCII `XMan` */
 #define SOF_EXT_MAN_MAGIC_NUMBER	0x6e614d58
@@ -54,6 +55,11 @@ struct sof_ext_man_header {
 
 /* Now define extended manifest elements */
 
+/* Extended manifest elements types */
+enum sof_ext_man_elem_type {
+	SOF_EXT_MAN_ELEM_FW_VERSION		= 0,
+};
+
 /* extended manifest element header */
 struct sof_ext_man_elem_header {
 	uint32_t type;		/*< SOF_EXT_MAN_ELEM_ */
@@ -62,4 +68,12 @@ struct sof_ext_man_elem_header {
 	/* just after this header should be type dependent content */
 } __packed;
 
+/* FW version */
+struct sof_ext_man_fw_version {
+	struct sof_ext_man_elem_header hdr;
+	/* use sof_ipc struct because of code re-use */
+	struct sof_ipc_fw_version version;
+	uint32_t flags;
+} __packed;
+
 #endif /* __SOF_FIRMWARE_EXT_MANIFEST_H__ */

sound/soc/sof/loader.c

@@ -127,6 +127,19 @@ int snd_sof_fw_parse_ext_data(struct snd_sof_dev *sdev, u32 bar, u32 offset)
 }
 EXPORT_SYMBOL(snd_sof_fw_parse_ext_data);
 
+static int ext_man_get_fw_version(struct snd_sof_dev *sdev,
+				  const struct sof_ext_man_elem_header *hdr)
+{
+	const struct sof_ext_man_fw_version *v =
+		container_of(hdr, struct sof_ext_man_fw_version, hdr);
+
+	memcpy(&sdev->fw_ready.version, &v->version, sizeof(v->version));
+	sdev->fw_ready.flags = v->flags;
+
+	/* log ABI versions and check FW compatibility */
+	return snd_sof_ipc_valid(sdev);
+}
+
 static ssize_t snd_sof_ext_man_size(const struct firmware *fw)
 {
 	const struct sof_ext_man_header *head;
@@ -197,6 +210,9 @@ static int snd_sof_fw_ext_man_parse(struct snd_sof_dev *sdev,
 
 		/* process structure data */
 		switch (elem_hdr->type) {
+		case SOF_EXT_MAN_ELEM_FW_VERSION:
+			ret = ext_man_get_fw_version(sdev, elem_hdr);
+			break;
 		default:
 			dev_warn(sdev->dev, "warning: unknown sof_ext_man header type %d size 0x%X\n",
 				 elem_hdr->type, elem_hdr->size);