ASoC: Intel: board_helpers: support BT offload link initialization

Add a helper function for machine drivers to initialize BT offload
DAI link.
Signed-off-by: Brent Lu <brent.lu@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20231127152654.28204-17-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/sof_board_helpers.c

@@ -290,6 +290,49 @@ int sof_intel_board_set_ssp_amp_link(struct device *dev,
 }
 EXPORT_SYMBOL_NS(sof_intel_board_set_ssp_amp_link, SND_SOC_INTEL_SOF_BOARD_HELPERS);
 
+int sof_intel_board_set_bt_link(struct device *dev,
+				struct snd_soc_dai_link *link, int be_id,
+				int ssp_bt)
+{
+	struct snd_soc_dai_link_component *cpus;
+
+	dev_dbg(dev, "link %d: bt offload, ssp %d\n", be_id, ssp_bt);
+
+	/* link name */
+	link->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-BT", ssp_bt);
+	if (!link->name)
+		return -ENOMEM;
+
+	/* cpus */
+	cpus = devm_kzalloc(dev, sizeof(struct snd_soc_dai_link_component),
+			    GFP_KERNEL);
+	if (!cpus)
+		return -ENOMEM;
+
+	cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d Pin", ssp_bt);
+	if (!cpus->dai_name)
+		return -ENOMEM;
+
+	link->cpus = cpus;
+	link->num_cpus = 1;
+
+	/* codecs */
+	link->codecs = &snd_soc_dummy_dlc;
+	link->num_codecs = 1;
+
+	/* platforms */
+	link->platforms = platform_component;
+	link->num_platforms = ARRAY_SIZE(platform_component);
+
+	link->id = be_id;
+	link->no_pcm = 1;
+	link->dpcm_capture = 1;
+	link->dpcm_playback = 1;
+
+	return 0;
+}
+EXPORT_SYMBOL_NS(sof_intel_board_set_bt_link, SND_SOC_INTEL_SOF_BOARD_HELPERS);
+
 MODULE_DESCRIPTION("ASoC Intel SOF Machine Driver Board Helpers");
 MODULE_AUTHOR("Brent Lu <brent.lu@intel.com>");
 MODULE_LICENSE("GPL");

sound/soc/intel/boards/sof_board_helpers.h

@@ -32,6 +32,8 @@ struct sof_rt5682_private {
  * @hdmi_num: number of Intel HDMI BE link
  * @ssp_codec: ssp port number of headphone BE link
  * @ssp_amp: ssp port number of speaker BE link
+ * @ssp_bt: ssp port number of BT offload BE link
+ * @bt_offload_present: true to create BT offload BE link
  * @rt5682: private data for rt5682 machine driver
  */
 struct sof_card_private {
@@ -46,6 +48,9 @@ struct sof_card_private {
 
 	int ssp_codec;
 	int ssp_amp;
+	int ssp_bt;
+
+	bool bt_offload_present;
 
 	union {
 		struct sof_rt5682_private rt5682;
@@ -71,5 +76,8 @@ int sof_intel_board_set_intel_hdmi_link(struct device *dev,
 int sof_intel_board_set_ssp_amp_link(struct device *dev,
 				     struct snd_soc_dai_link *link, int be_id,
 				     enum sof_ssp_codec amp_type, int ssp_amp);
+int sof_intel_board_set_bt_link(struct device *dev,
+				struct snd_soc_dai_link *link, int be_id,
+				int ssp_bt);
 
 #endif /* __SOF_INTEL_BOARD_HELPERS_H */