// SPDX-License-Identifier: GPL-2.0-only
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// Copyright (c) 2015-2019 Intel Corporation
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#include <linux/acpi.h>
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#include <sound/intel-nhlt.h>
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struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
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{
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struct nhlt_acpi_table *nhlt;
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acpi_status status;
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status = acpi_get_table(ACPI_SIG_NHLT, 0,
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(struct acpi_table_header **)&nhlt);
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if (ACPI_FAILURE(status)) {
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dev_warn(dev, "NHLT table not found\n");
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return NULL;
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}
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return nhlt;
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}
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EXPORT_SYMBOL_GPL(intel_nhlt_init);
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void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
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{
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acpi_put_table((struct acpi_table_header *)nhlt);
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}
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EXPORT_SYMBOL_GPL(intel_nhlt_free);
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int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
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{
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struct nhlt_endpoint *epnt;
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struct nhlt_dmic_array_config *cfg;
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struct nhlt_vendor_dmic_array_config *cfg_vendor;
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struct nhlt_fmt *fmt_configs;
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unsigned int dmic_geo = 0;
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u16 max_ch = 0;
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u8 i, j;
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if (!nhlt)
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return 0;
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if (nhlt->header.length <= sizeof(struct acpi_table_header)) {
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dev_warn(dev, "Invalid DMIC description table\n");
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return 0;
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}
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for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++,
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epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length)) {
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if (epnt->linktype != NHLT_LINK_DMIC)
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continue;
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cfg = (struct nhlt_dmic_array_config *)(epnt->config.caps);
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fmt_configs = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
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/* find max number of channels based on format_configuration */
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if (fmt_configs->fmt_count) {
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struct nhlt_fmt_cfg *fmt_cfg = fmt_configs->fmt_config;
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dev_dbg(dev, "found %d format definitions\n",
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fmt_configs->fmt_count);
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for (i = 0; i < fmt_configs->fmt_count; i++) {
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struct wav_fmt_ext *fmt_ext;
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fmt_ext = &fmt_cfg->fmt_ext;
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if (fmt_ext->fmt.channels > max_ch)
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max_ch = fmt_ext->fmt.channels;
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/* Move to the next nhlt_fmt_cfg */
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fmt_cfg = (struct nhlt_fmt_cfg *)(fmt_cfg->config.caps +
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fmt_cfg->config.size);
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}
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dev_dbg(dev, "max channels found %d\n", max_ch);
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} else {
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dev_dbg(dev, "No format information found\n");
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}
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if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
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dmic_geo = max_ch;
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} else {
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switch (cfg->array_type) {
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case NHLT_MIC_ARRAY_2CH_SMALL:
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case NHLT_MIC_ARRAY_2CH_BIG:
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dmic_geo = MIC_ARRAY_2CH;
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break;
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case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
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case NHLT_MIC_ARRAY_4CH_L_SHAPED:
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case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
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dmic_geo = MIC_ARRAY_4CH;
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break;
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case NHLT_MIC_ARRAY_VENDOR_DEFINED:
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cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
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dmic_geo = cfg_vendor->nb_mics;
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break;
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default:
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dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
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__func__, cfg->array_type);
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}
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if (dmic_geo > 0) {
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dev_dbg(dev, "Array with %d dmics\n", dmic_geo);
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}
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if (max_ch > dmic_geo) {
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dev_dbg(dev, "max channels %d exceed dmic number %d\n",
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max_ch, dmic_geo);
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}
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}
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}
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dev_dbg(dev, "dmic number %d max_ch %d\n", dmic_geo, max_ch);
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return dmic_geo;
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}
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EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
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