237 lines
6.3 KiB
C
237 lines
6.3 KiB
C
// 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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bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type)
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{
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struct nhlt_endpoint *epnt;
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int i;
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if (!nhlt)
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return false;
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epnt = (struct nhlt_endpoint *)nhlt->desc;
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for (i = 0; i < nhlt->endpoint_count; i++) {
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if (epnt->linktype == link_type)
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return true;
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epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
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}
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return false;
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}
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EXPORT_SYMBOL(intel_nhlt_has_endpoint_type);
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int intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table *nhlt, u8 device_type)
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{
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struct nhlt_endpoint *epnt;
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int ssp_mask = 0;
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int i;
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if (!nhlt || (device_type != NHLT_DEVICE_BT && device_type != NHLT_DEVICE_I2S))
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return 0;
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epnt = (struct nhlt_endpoint *)nhlt->desc;
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for (i = 0; i < nhlt->endpoint_count; i++) {
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if (epnt->linktype == NHLT_LINK_SSP && epnt->device_type == device_type) {
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/* for SSP the virtual bus id is the SSP port */
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ssp_mask |= BIT(epnt->virtual_bus_id);
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}
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epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
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}
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return ssp_mask;
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}
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EXPORT_SYMBOL(intel_nhlt_ssp_endpoint_mask);
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static struct nhlt_specific_cfg *
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nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch,
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u32 rate, u8 vbps, u8 bps)
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{
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struct nhlt_fmt_cfg *cfg = fmt->fmt_config;
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struct wav_fmt *wfmt;
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u16 _bps, _vbps;
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int i;
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dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count);
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for (i = 0; i < fmt->fmt_count; i++) {
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wfmt = &cfg->fmt_ext.fmt;
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_bps = wfmt->bits_per_sample;
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_vbps = cfg->fmt_ext.sample.valid_bits_per_sample;
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dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n",
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wfmt->channels, _vbps, _bps, wfmt->samples_per_sec);
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if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate &&
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vbps == _vbps && bps == _bps)
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return &cfg->config;
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cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
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}
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return NULL;
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}
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static bool nhlt_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
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u32 bus_id, u8 link_type, u8 dir, u8 dev_type)
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{
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dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
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epnt->virtual_bus_id, epnt->linktype,
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epnt->direction, epnt->device_type);
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if ((epnt->virtual_bus_id != bus_id) ||
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(epnt->linktype != link_type) ||
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(epnt->direction != dir))
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return false;
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/* link of type DMIC bypasses device_type check */
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return epnt->linktype == NHLT_LINK_DMIC ||
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epnt->device_type == dev_type;
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}
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struct nhlt_specific_cfg *
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intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt,
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u32 bus_id, u8 link_type, u8 vbps, u8 bps,
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u8 num_ch, u32 rate, u8 dir, u8 dev_type)
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{
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struct nhlt_specific_cfg *cfg;
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struct nhlt_endpoint *epnt;
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struct nhlt_fmt *fmt;
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int i;
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if (!nhlt)
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return NULL;
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dev_dbg(dev, "Looking for configuration:\n");
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dev_dbg(dev, " vbus_id=%d link_type=%d dir=%d, dev_type=%d\n",
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bus_id, link_type, dir, dev_type);
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dev_dbg(dev, " ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate);
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dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count);
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epnt = (struct nhlt_endpoint *)nhlt->desc;
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for (i = 0; i < nhlt->endpoint_count; i++) {
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if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) {
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fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
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cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate, vbps, bps);
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if (cfg)
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return cfg;
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}
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epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
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}
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return NULL;
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}
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EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);
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