sound/hda/intel-nhlt.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 // Copyright (c) 2015-2019 Intel Corporation
   3
   4 #include <linux/acpi.h>
   5 #include <sound/intel-nhlt.h>
   6
   7 struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
   8 {
   9         struct nhlt_acpi_table *nhlt;
  10         acpi_status status;
  11
  12         status = acpi_get_table(ACPI_SIG_NHLT, 0,
  13                                 (struct acpi_table_header **)&nhlt);
  14         if (ACPI_FAILURE(status)) {
  15                 dev_warn(dev, "NHLT table not found\n");
  16                 return NULL;
  17         }
  18
  19         return nhlt;
  20 }
  21 EXPORT_SYMBOL_GPL(intel_nhlt_init);
  22
  23 void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
  24 {
  25         acpi_put_table((struct acpi_table_header *)nhlt);
  26 }
  27 EXPORT_SYMBOL_GPL(intel_nhlt_free);
  28
  29 int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
  30 {
  31         struct nhlt_endpoint *epnt;
  32         struct nhlt_dmic_array_config *cfg;
  33         struct nhlt_vendor_dmic_array_config *cfg_vendor;
  34         unsigned int dmic_geo = 0;
  35         u8 j;
  36
  37         if (!nhlt)
  38                 return 0;
  39
  40         epnt = (struct nhlt_endpoint *)nhlt->desc;
  41
  42         for (j = 0; j < nhlt->endpoint_count; j++) {
  43                 if (epnt->linktype == NHLT_LINK_DMIC) {
  44                         cfg = (struct nhlt_dmic_array_config  *)
  45                                         (epnt->config.caps);
  46                         switch (cfg->array_type) {
  47                         case NHLT_MIC_ARRAY_2CH_SMALL:
  48                         case NHLT_MIC_ARRAY_2CH_BIG:
  49                                 dmic_geo = MIC_ARRAY_2CH;
  50                                 break;
  51
  52                         case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
  53                         case NHLT_MIC_ARRAY_4CH_L_SHAPED:
  54                         case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
  55                                 dmic_geo = MIC_ARRAY_4CH;
  56                                 break;
  57                         case NHLT_MIC_ARRAY_VENDOR_DEFINED:
  58                                 cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
  59                                 dmic_geo = cfg_vendor->nb_mics;
  60                                 break;
  61                         default:
  62                                 dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
  63                                          cfg->array_type);
  64                         }
  65                 }
  66                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
  67         }
  68
  69         return dmic_geo;
  70 }
  71 EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);