LXR linux/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
   7struct 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}
  21EXPORT_SYMBOL_GPL(intel_nhlt_init);
  22
  23void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
  24{
  25        acpi_put_table((struct acpi_table_header *)nhlt);
  26}
  27EXPORT_SYMBOL_GPL(intel_nhlt_free);
  28
  29int 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}
  71EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
  72