ASoC: SOF: topology: allow user to add topologies

Currently, the function topology provides the basic audio function. The
commit allow the users add their topologies to the topology list. So
they can add their own features.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

Author: bardliao

sound/soc/sof/topology.c

@@ -23,6 +23,13 @@ static bool disable_function_topology;
 module_param(disable_function_topology, bool, 0444);
 MODULE_PARM_DESC(disable_function_topology, "Disable function topology loading");
 
+#define MAX_USER_TPLG_COUNT 5
+
+static char *user_topologies[MAX_USER_TPLG_COUNT];
+static int user_tplg_cnt;
+module_param_array(user_topologies, charp, &user_tplg_cnt, 0444);
+MODULE_PARM_DESC(index, "Topology list for virtual loop DAI link");
+
 #define COMP_ID_UNASSIGNED		0xffffffff
 /*
  * Constants used in the computation of linear volume gain
@@ -2590,6 +2597,40 @@ int snd_sof_load_topology(struct snd_soc_component *scomp, const char *file)
 		}
 	}
 
+	/* Loading user defined topologies */
+	for (i = 0; i < user_tplg_cnt; i++) {
+		const char *user_topology = devm_kasprintf(scomp->dev, GFP_KERNEL, "%s/%s",
+							   tplg_filename_prefix,
+							   user_topologies[i]);
+
+		dev_info(scomp->dev, "loading user topology %d: %s\n", i, user_topology);
+		ret = request_firmware(&fw, user_topology, scomp->dev);
+		if (ret < 0) {
+			/*
+			 * snd_soc_tplg_component_remove(scomp) will be called
+			 * if snd_soc_tplg_component_load(scomp) failed and all
+			 * objects in the scomp will be removed. No need to call
+			 * snd_soc_tplg_component_remove(scomp) here.
+			 */
+			dev_err(scomp->dev, "tplg request firmware %s failed err: %d\n",
+				tplg_files[i], ret);
+			goto out;
+		}
+
+		if (sdev->dspless_mode_selected)
+			ret = snd_soc_tplg_component_load(scomp, &sof_dspless_tplg_ops, fw);
+		else
+			ret = snd_soc_tplg_component_load(scomp, &sof_tplg_ops, fw);
+
+		release_firmware(fw);
+
+		if (ret < 0) {
+			dev_err(scomp->dev, "tplg %s component load failed %d\n",
+				tplg_files[i], ret);
+			goto out;
+		}
+	}
+
 	/* call sof_complete when topologies are loaded successfully */
 	ret = sof_complete(scomp);