1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2015-2019 Intel Corporation
4 #include <linux/acpi.h>
5 #include <sound/intel-nhlt.h>
7 struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
9 struct nhlt_acpi_table *nhlt;
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");
21 EXPORT_SYMBOL_GPL(intel_nhlt_init);
23 void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
25 acpi_put_table((struct acpi_table_header *)nhlt);
27 EXPORT_SYMBOL_GPL(intel_nhlt_free);
29 int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
31 struct nhlt_endpoint *epnt;
32 struct nhlt_dmic_array_config *cfg;
33 struct nhlt_vendor_dmic_array_config *cfg_vendor;
34 struct nhlt_fmt *fmt_configs;
35 unsigned int dmic_geo = 0;
42 if (nhlt->header.length <= sizeof(struct acpi_table_header)) {
43 dev_warn(dev, "Invalid DMIC description table\n");
47 for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++,
48 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length)) {
50 if (epnt->linktype != NHLT_LINK_DMIC)
53 cfg = (struct nhlt_dmic_array_config *)(epnt->config.caps);
54 fmt_configs = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
56 /* find max number of channels based on format_configuration */
57 if (fmt_configs->fmt_count) {
58 struct nhlt_fmt_cfg *fmt_cfg = fmt_configs->fmt_config;
60 dev_dbg(dev, "found %d format definitions\n",
61 fmt_configs->fmt_count);
63 for (i = 0; i < fmt_configs->fmt_count; i++) {
64 struct wav_fmt_ext *fmt_ext;
66 fmt_ext = &fmt_cfg->fmt_ext;
68 if (fmt_ext->fmt.channels > max_ch)
69 max_ch = fmt_ext->fmt.channels;
71 /* Move to the next nhlt_fmt_cfg */
72 fmt_cfg = (struct nhlt_fmt_cfg *)(fmt_cfg->config.caps +
73 fmt_cfg->config.size);
75 dev_dbg(dev, "max channels found %d\n", max_ch);
77 dev_dbg(dev, "No format information found\n");
80 if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
83 switch (cfg->array_type) {
84 case NHLT_MIC_ARRAY_2CH_SMALL:
85 case NHLT_MIC_ARRAY_2CH_BIG:
86 dmic_geo = MIC_ARRAY_2CH;
89 case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
90 case NHLT_MIC_ARRAY_4CH_L_SHAPED:
91 case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
92 dmic_geo = MIC_ARRAY_4CH;
94 case NHLT_MIC_ARRAY_VENDOR_DEFINED:
95 cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
96 dmic_geo = cfg_vendor->nb_mics;
99 dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
100 __func__, cfg->array_type);
104 dev_dbg(dev, "Array with %d dmics\n", dmic_geo);
106 if (max_ch > dmic_geo) {
107 dev_dbg(dev, "max channels %d exceed dmic number %d\n",
113 dev_dbg(dev, "dmic number %d max_ch %d\n", dmic_geo, max_ch);
117 EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);