forked from Minki/linux
0c470db039
The NHLT information can be used to figure out which SSPs are enabled in a platform. The 'SSP' link type is too broad for machine drivers, since it can cover the Bluetooth sideband and the analog audio codec connections, so this helper exposes a parameter to filter with the device type (DEVICE_I2S refers to analog audio codec in NHLT parlance). The helper returns a mask, since more than one SSP may be used for analog audio, e.g. the NHLT spec describes the use of SSP0 for amplifiers and SSP1 for headset codec. Note that if more than one bit is set, it's impossible to determine which SSP is connected to what external component. Additional platform-specific information based on e.g. DMI quirks would still be required in the machine driver to configure the relevant dailinks. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com> Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com> Acked-by: Takashi Iwai <tiwai@suse.de> Link: https://lore.kernel.org/r/20220308192610.392950-5-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
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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