ASoC: SOF: Intel: hda: support BT link mask in mach_params

Add an new variable bt_link_mask to snd_soc_acpi_mach_params structure.
SSP port mask of BT offload found in NHLT table will be sent to
machine driver to setup BE dai link with correct SSP port number.

Signed-off-by: Brent Lu <brent.lu@intel.com>

include/sound/soc-acpi.h

@@ -73,6 +73,7 @@ static inline struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg)
  * @subsystem_rev: optional PCI SSID revision value
  * @subsystem_id_set: true if a value has been written to
  * subsystem_vendor and subsystem_device.
+ * @bt_link_mask: BT offload link enabled on the board
  */
 struct snd_soc_acpi_mach_params {
  u32 acpi_ipc_irq_index;
@@ -89,6 +90,7 @@ struct snd_soc_acpi_mach_params {
  unsigned short subsystem_device;
  unsigned short subsystem_rev;
  bool subsystem_id_set;
+ u32 bt_link_mask;
 };
 
 /**

sound/soc/sof/intel/hda.c

@@ -444,6 +444,10 @@ static int mclk_id_override = -1;
 module_param_named(mclk_id, mclk_id_override, int, 0444);
 MODULE_PARM_DESC(mclk_id, "SOF SSP mclk_id");
 
+static int bt_link_mask_override;
+module_param_named(bt_link_mask, bt_link_mask_override, int, 0444);
+MODULE_PARM_DESC(bt_link_mask, "SOF BT offload link mask");
+
 static int hda_init(struct snd_sof_dev *sdev)
 {
  struct hda_bus *hbus;
@@ -529,7 +533,7 @@ static int check_dmic_num(struct snd_sof_dev *sdev)
  return dmic_num;
 }
 
-static int check_nhlt_ssp_mask(struct snd_sof_dev *sdev)
+static int check_nhlt_ssp_mask(struct snd_sof_dev *sdev, u8 device_type)
 {
  struct sof_intel_hda_dev *hdev = sdev->pdata->hw_pdata;
  struct nhlt_acpi_table *nhlt;
@@ -540,9 +544,11 @@ static int check_nhlt_ssp_mask(struct snd_sof_dev *sdev)
  return ssp_mask;
 
  if (intel_nhlt_has_endpoint_type(nhlt, NHLT_LINK_SSP)) {
- ssp_mask = intel_nhlt_ssp_endpoint_mask(nhlt, NHLT_DEVICE_I2S);
+ ssp_mask = intel_nhlt_ssp_endpoint_mask(nhlt, device_type);
  if (ssp_mask)
- dev_info(sdev->dev, "NHLT_DEVICE_I2S detected, ssp_mask %#x\n", ssp_mask);
+ dev_info(sdev->dev, "NHLT device %s(%d) detected, ssp_mask %#x\n",
+ device_type == NHLT_DEVICE_BT ? "BT" : "I2S",
+ device_type, ssp_mask);
  }
 
  return ssp_mask;
@@ -1233,8 +1239,29 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
  * Otherwise, set certain mach params.
  */
  hda_generic_machine_select(sdev, &mach);
- if (!mach)
+ if (!mach) {
  dev_warn(sdev->dev, "warning: No matching ASoC machine driver found\n");
+ return NULL;
+ }
+
+ /* report BT offload link mask to machine driver */
+ mach->mach_params.bt_link_mask = check_nhlt_ssp_mask(sdev, NHLT_DEVICE_BT);
+
+ dev_info(sdev->dev, "BT link detected in NHLT tables: %#x\n",
+ mach->mach_params.bt_link_mask);
+
+ /* allow for module parameter override */
+ if (bt_link_mask_override) {
+ dev_dbg(sdev->dev, "overriding BT link detected in NHLT tables %#x by kernel param %#x\n",
+ mach->mach_params.bt_link_mask, bt_link_mask_override);
+ mach->mach_params.bt_link_mask = bt_link_mask_override;
+ }
+
+ if (hweight_long(mach->mach_params.bt_link_mask) > 1) {
+ dev_warn(sdev->dev, "invalid BT link mask %#x found, reset the mask\n",
+ mach->mach_params.bt_link_mask);
+ mach->mach_params.bt_link_mask = 0;
+ }
 
  /*
  * Fixup tplg file name by appending dmic num, ssp num, codec/amplifier
@@ -1308,7 +1335,7 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
  }
 
  /* report SSP link mask to machine driver */
- mach->mach_params.i2s_link_mask = check_nhlt_ssp_mask(sdev);
+ mach->mach_params.i2s_link_mask = check_nhlt_ssp_mask(sdev, NHLT_DEVICE_I2S);
 
  if (tplg_fixup &&
  mach->tplg_quirk_mask & SND_SOC_ACPI_TPLG_INTEL_SSP_NUMBER &&