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112 lines
2.9 KiB
112 lines
2.9 KiB
// 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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dev_dbg(dev, "%s: found %d format definitions\n", |
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__func__, 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_configs->fmt_config[i].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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} |
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dev_dbg(dev, "%s: max channels found %d\n", __func__, max_ch); |
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} else { |
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dev_dbg(dev, "%s: No format information found\n", __func__); |
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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, "%s: Array with %d dmics\n", __func__, dmic_geo); |
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} |
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if (max_ch > dmic_geo) { |
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dev_dbg(dev, "%s: max channels %d exceed dmic number %d\n", |
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__func__, max_ch, dmic_geo); |
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} |
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} |
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} |
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dev_dbg(dev, "%s: dmic number %d max_ch %d\n", |
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__func__, 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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