// SPDX-License-Identifier: GPL-2.0-only // Copyright (c) 2015-2019 Intel Corporation #include <linux/acpi.h> #include <sound/intel-nhlt.h> struct nhlt_acpi_table *intel_nhlt_init(struct device *dev) { struct nhlt_acpi_table *nhlt; acpi_status status; status = acpi_get_table(ACPI_SIG_NHLT, 0, (struct acpi_table_header **)&nhlt); if (ACPI_FAILURE(status)) { dev_warn(dev, "NHLT table not found\n"); return NULL; } return nhlt; } EXPORT_SYMBOL_GPL(intel_nhlt_init); void intel_nhlt_free(struct nhlt_acpi_table *nhlt) { acpi_put_table((struct acpi_table_header *)nhlt); } EXPORT_SYMBOL_GPL(intel_nhlt_free); int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt) { struct nhlt_endpoint *epnt; struct nhlt_dmic_array_config *cfg; struct nhlt_vendor_dmic_array_config *cfg_vendor; struct nhlt_fmt *fmt_configs; unsigned int dmic_geo = 0; u16 max_ch = 0; u8 i, j; if (!nhlt) return 0; if (nhlt->header.length <= sizeof(struct acpi_table_header)) { dev_warn(dev, "Invalid DMIC description table\n"); return 0; } for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++, epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length)) { if (epnt->linktype != NHLT_LINK_DMIC) continue; cfg = (struct nhlt_dmic_array_config *)(epnt->config.caps); fmt_configs = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size); /* find max number of channels based on format_configuration */ if (fmt_configs->fmt_count) { dev_dbg(dev, "found %d format definitions\n", fmt_configs->fmt_count); for (i = 0; i < fmt_configs->fmt_count; i++) { struct wav_fmt_ext *fmt_ext; fmt_ext = &fmt_configs->fmt_config[i].fmt_ext; if (fmt_ext->fmt.channels > max_ch) max_ch = fmt_ext->fmt.channels; } dev_dbg(dev, "max channels found %d\n", max_ch); } else { dev_dbg(dev, "No format information found\n"); } if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) { dmic_geo = max_ch; } else { switch (cfg->array_type) { case NHLT_MIC_ARRAY_2CH_SMALL: case NHLT_MIC_ARRAY_2CH_BIG: dmic_geo = MIC_ARRAY_2CH; break; case NHLT_MIC_ARRAY_4CH_1ST_GEOM: case NHLT_MIC_ARRAY_4CH_L_SHAPED: case NHLT_MIC_ARRAY_4CH_2ND_GEOM: dmic_geo = MIC_ARRAY_4CH; break; case NHLT_MIC_ARRAY_VENDOR_DEFINED: cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg; dmic_geo = cfg_vendor->nb_mics; break; default: dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n", __func__, cfg->array_type); } if (dmic_geo > 0) { dev_dbg(dev, "Array with %d dmics\n", dmic_geo); } if (max_ch > dmic_geo) { dev_dbg(dev, "max channels %d exceed dmic number %d\n", max_ch, dmic_geo); } } } dev_dbg(dev, "dmic number %d max_ch %d\n", dmic_geo, max_ch); return dmic_geo; } EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo); bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type) { struct nhlt_endpoint *epnt; int i; if (!nhlt) return false; epnt = (struct nhlt_endpoint *)nhlt->desc; for (i = 0; i < nhlt->endpoint_count; i++) { if (epnt->linktype == link_type) return true; epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); } return false; } EXPORT_SYMBOL(intel_nhlt_has_endpoint_type); int intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table *nhlt, u8 device_type) { struct nhlt_endpoint *epnt; int ssp_mask = 0; int i; if (!nhlt || (device_type != NHLT_DEVICE_BT && device_type != NHLT_DEVICE_I2S)) return 0; epnt = (struct nhlt_endpoint *)nhlt->desc; for (i = 0; i < nhlt->endpoint_count; i++) { if (epnt->linktype == NHLT_LINK_SSP && epnt->device_type == device_type) { /* for SSP the virtual bus id is the SSP port */ ssp_mask |= BIT(epnt->virtual_bus_id); } epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); } return ssp_mask; } EXPORT_SYMBOL(intel_nhlt_ssp_endpoint_mask); static struct nhlt_specific_cfg * nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch, u32 rate, u8 vbps, u8 bps) { struct nhlt_fmt_cfg *cfg = fmt->fmt_config; struct wav_fmt *wfmt; u16 _bps, _vbps; int i; dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count); for (i = 0; i < fmt->fmt_count; i++) { wfmt = &cfg->fmt_ext.fmt; _bps = wfmt->bits_per_sample; _vbps = cfg->fmt_ext.sample.valid_bits_per_sample; dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n", wfmt->channels, _vbps, _bps, wfmt->samples_per_sec); if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate && vbps == _vbps && bps == _bps) return &cfg->config; cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size); } return NULL; } static bool nhlt_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt, u32 bus_id, u8 link_type, u8 dir, u8 dev_type) { dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n", epnt->virtual_bus_id, epnt->linktype, epnt->direction, epnt->device_type); if ((epnt->virtual_bus_id != bus_id) || (epnt->linktype != link_type) || (epnt->direction != dir)) return false; /* link of type DMIC bypasses device_type check */ return epnt->linktype == NHLT_LINK_DMIC || epnt->device_type == dev_type; } struct nhlt_specific_cfg * intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt, u32 bus_id, u8 link_type, u8 vbps, u8 bps, u8 num_ch, u32 rate, u8 dir, u8 dev_type) { struct nhlt_specific_cfg *cfg; struct nhlt_endpoint *epnt; struct nhlt_fmt *fmt; int i; if (!nhlt) return NULL; dev_dbg(dev, "Looking for configuration:\n"); dev_dbg(dev, " vbus_id=%d link_type=%d dir=%d, dev_type=%d\n", bus_id, link_type, dir, dev_type); dev_dbg(dev, " ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate); dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count); epnt = (struct nhlt_endpoint *)nhlt->desc; for (i = 0; i < nhlt->endpoint_count; i++) { if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) { fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size); cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate, vbps, bps); if (cfg) return cfg; } epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); } return NULL; } EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);