ASoC: Intel: add SDCA Amp feedback fragment topology support

Use the topology with feedback PCM if the SDCA smart amp capture dai
link is created. The commit makes an assumption that the smart amp
playback dai link is always created if the smart amp capture dai link is
present. That is a reasonable assumption because it makes no sense that
a feedback work without playback.

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

Author: bardliao

sound/soc/intel/common/sof-function-topology-lib.c

@@ -16,6 +16,7 @@
 enum tplg_device_id {
 	TPLG_DEVICE_SDCA_JACK,
 	TPLG_DEVICE_SDCA_AMP,
+	TPLG_DEVICE_SDCA_AMP_FEEDBACK,
 	TPLG_DEVICE_SDCA_MIC,
 	TPLG_DEVICE_INTEL_PCH_DMIC,
 	TPLG_DEVICE_HDMI,
@@ -35,6 +36,7 @@ int sof_sdw_get_tplg_files(struct snd_soc_card *card, const struct snd_soc_acpi_
 	const struct firmware *fw;
 	char platform[SOF_INTEL_PLATFORM_NAME_MAX];
 	unsigned long tplg_mask = 0;
+	int amp_tplg_num;
 	int tplg_num = 0;
 	int tplg_dev;
 	int ret;
@@ -55,9 +57,41 @@ int sof_sdw_get_tplg_files(struct snd_soc_card *card, const struct snd_soc_acpi_
 			tplg_dev = TPLG_DEVICE_SDCA_JACK;
 			tplg_dev_name = "sdca-jack";
 		} else if (strstr(dai_link->name, "SmartAmp")) {
-			tplg_dev = TPLG_DEVICE_SDCA_AMP;
-			tplg_dev_name = devm_kasprintf(card->dev, GFP_KERNEL,
-						       "sdca-%damp", dai_link->num_cpus);
+			/* If the AMP feedback topology is already used, continue */
+			if (tplg_mask & BIT(TPLG_DEVICE_SDCA_AMP_FEEDBACK))
+				continue;
+			if (strstr(dai_link->name, "Playback")) {
+				tplg_dev = TPLG_DEVICE_SDCA_AMP;
+				tplg_dev_name = devm_kasprintf(card->dev, GFP_KERNEL,
+							       "sdca-%damp", dai_link->num_cpus);
+				amp_tplg_num = tplg_num;
+			} else { /* Capture */
+				tplg_dev = TPLG_DEVICE_SDCA_AMP_FEEDBACK;
+				tplg_dev_name = devm_kasprintf(card->dev, GFP_KERNEL,
+							       "sdca-%damp-feedback",
+							       dai_link->num_cpus);
+				/* Replace the AMP topology with feedback */
+				if (tplg_mask & BIT(TPLG_DEVICE_SDCA_AMP)) {
+					/*
+					 * Update tplg_mask and test tplg_dev_name as it will
+					 * continue in this if condition.
+					 */
+					tplg_mask |= BIT(tplg_dev);
+					if (!tplg_dev_name)
+						return -ENOMEM;
+
+					(*tplg_files)[amp_tplg_num] =
+						devm_kasprintf(card->dev, GFP_KERNEL,
+							       "%s/sof-%s-id%d.tplg",
+							       prefix, tplg_dev_name,
+							       dai_link->id);
+					if (!(*tplg_files)[amp_tplg_num])
+						return -ENOMEM;
+
+					/* No need to add tplg file to the tplg_files list */
+					continue;
+				}
+			}
 			if (!tplg_dev_name)
 				return -ENOMEM;
 		} else if (strstr(dai_link->name, "SmartMic")) {