ASoC: core: Add name prefix for machines with topology rewrites

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -1015,6 +1015,7 @@ struct snd_soc_platform_driver {
 
 	/* this platform uses topology and ignore machine driver FEs */
 	const char *ignore_machine;
+	const char *topology_name_prefix;
 	int (*be_hw_params_fixup)(struct snd_soc_pcm_runtime *rtd,
 				  struct snd_pcm_hw_params *params);
 	bool use_dai_pcm_id;	/* use the DAI link PCM ID as PCM device number */
@@ -1167,6 +1168,7 @@ struct snd_soc_card {
 	const char *long_name;
 	const char *driver_name;
 	char dmi_longname[80];
+	char topology_shortname[32];
 
 	struct device *dev;
 	struct snd_card *snd_card;

sound/soc/soc-core.c

@@ -2143,6 +2143,14 @@ static void soc_check_tplg_fes(struct snd_soc_card *card)
 			if (!dai_link->stream_name)
 				dai_link->stream_name = dai_link->name;
 		}
+
+		/* Inform userspace we are using alternate topology */
+		if (platform->driver->topology_name_prefix) {
+			snprintf(card->topology_shortname, 32, "%s-%s",
+				 platform->driver->topology_name_prefix,
+				 card->name);
+			card->name = card->topology_shortname;
+		}
 	}
 }