| 1 | // SPDX-License-Identifier: GPL-2.0-only
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| 2 | // Copyright (c) 2015-2019 Intel Corporation
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| 3 |
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| 4 | #include <linux/acpi.h>
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| 5 | #include <sound/intel-nhlt.h>
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| 6 |
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| 7 | struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
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| 8 | {
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| 9 | struct nhlt_acpi_table *nhlt;
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| 10 | acpi_status status;
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| 11 |
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| 12 | status = acpi_get_table(ACPI_SIG_NHLT, 0,
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| 13 | (struct acpi_table_header **)&nhlt);
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| 14 | if (ACPI_FAILURE(status)) {
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| 15 | dev_warn(dev, "NHLT table not found\n");
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| 16 | return NULL;
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| 17 | }
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| 18 |
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| 19 | return nhlt;
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| 20 | }
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| 21 | EXPORT_SYMBOL_GPL(intel_nhlt_init);
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| 22 |
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| 23 | void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
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| 24 | {
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| 25 | acpi_put_table((struct acpi_table_header *)nhlt);
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| 26 | }
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| 27 | EXPORT_SYMBOL_GPL(intel_nhlt_free);
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| 28 |
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| 29 | int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
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| 30 | {
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| 31 | struct nhlt_endpoint *epnt;
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| 32 | struct nhlt_dmic_array_config *cfg;
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| 33 | struct nhlt_vendor_dmic_array_config *cfg_vendor;
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| 34 | struct nhlt_fmt *fmt_configs;
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| 35 | unsigned int dmic_geo = 0;
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| 36 | u16 max_ch = 0;
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| 37 | u8 i, j;
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| 38 |
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| 39 | if (!nhlt)
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| 40 | return 0;
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| 41 |
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| 42 | if (nhlt->header.length <= sizeof(struct acpi_table_header)) {
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| 43 | dev_warn(dev, "Invalid DMIC description table\n");
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| 44 | return 0;
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| 45 | }
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| 46 |
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| 47 | for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++,
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| 48 | epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length)) {
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| 49 |
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| 50 | if (epnt->linktype != NHLT_LINK_DMIC)
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| 51 | continue;
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| 52 |
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| 53 | cfg = (struct nhlt_dmic_array_config *)(epnt->config.caps);
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| 54 | fmt_configs = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
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| 55 |
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| 56 | /* find max number of channels based on format_configuration */
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| 57 | if (fmt_configs->fmt_count) {
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| 58 | dev_dbg(dev, "%s: found %d format definitions\n",
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| 59 | __func__, fmt_configs->fmt_count);
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| 60 |
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| 61 | for (i = 0; i < fmt_configs->fmt_count; i++) {
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| 62 | struct wav_fmt_ext *fmt_ext;
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| 63 |
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| 64 | fmt_ext = &fmt_configs->fmt_config[i].fmt_ext;
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| 65 |
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| 66 | if (fmt_ext->fmt.channels > max_ch)
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| 67 | max_ch = fmt_ext->fmt.channels;
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| 68 | }
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| 69 | dev_dbg(dev, "%s: max channels found %d\n", __func__, max_ch);
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| 70 | } else {
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| 71 | dev_dbg(dev, "%s: No format information found\n", __func__);
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| 72 | }
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| 73 |
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| 74 | if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
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| 75 | dmic_geo = max_ch;
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| 76 | } else {
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| 77 | switch (cfg->array_type) {
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| 78 | case NHLT_MIC_ARRAY_2CH_SMALL:
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| 79 | case NHLT_MIC_ARRAY_2CH_BIG:
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| 80 | dmic_geo = MIC_ARRAY_2CH;
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| 81 | break;
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| 82 |
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| 83 | case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
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| 84 | case NHLT_MIC_ARRAY_4CH_L_SHAPED:
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| 85 | case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
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| 86 | dmic_geo = MIC_ARRAY_4CH;
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| 87 | break;
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| 88 | case NHLT_MIC_ARRAY_VENDOR_DEFINED:
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| 89 | cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
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| 90 | dmic_geo = cfg_vendor->nb_mics;
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| 91 | break;
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| 92 | default:
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| 93 | dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
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| 94 | __func__, cfg->array_type);
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| 95 | }
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| 96 |
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| 97 | if (dmic_geo > 0) {
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| 98 | dev_dbg(dev, "%s: Array with %d dmics\n", __func__, dmic_geo);
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| 99 | }
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| 100 | if (max_ch > dmic_geo) {
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| 101 | dev_dbg(dev, "%s: max channels %d exceed dmic number %d\n",
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| 102 | __func__, max_ch, dmic_geo);
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| 103 | }
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| 104 | }
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| 105 | }
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| 106 |
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| 107 | dev_dbg(dev, "%s: dmic number %d max_ch %d\n",
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| 108 | __func__, dmic_geo, max_ch);
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| 109 |
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| 110 | return dmic_geo;
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| 111 | }
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| 112 | EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
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