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 <[email protected]>
Reviewed-by: Pierre-Louis Bossart <[email protected]>
Reviewed-by: Bard Liao <[email protected]>
Signed-off-by: Peter Ujfalusi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

1 files changed, 43 insertions, 0 deletions

diff --git a/sound/soc/intel/boards/sof_board_helpers.c b/sound/soc/intel/boards/sof_board_helpers.c
index 515634db0a4d..335c660561d5 100644
--- a/sound/soc/intel/boards/sof_board_helpers.c
+++ b/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 <[email protected]>");
 MODULE_LICENSE("GPL");