1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2015-2019 Intel Corporation
4 #include <linux/acpi.h>
5 #include <sound/intel-nhlt.h>
7 struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
9 struct nhlt_acpi_table *nhlt;
12 status = acpi_get_table(ACPI_SIG_NHLT, 0,
13 (struct acpi_table_header **)&nhlt);
14 if (ACPI_FAILURE(status)) {
15 dev_warn(dev, "NHLT table not found\n");
21 EXPORT_SYMBOL_GPL(intel_nhlt_init);
23 void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
25 acpi_put_table((struct acpi_table_header *)nhlt);
27 EXPORT_SYMBOL_GPL(intel_nhlt_free);
29 int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
31 struct nhlt_endpoint *epnt;
32 struct nhlt_dmic_array_config *cfg;
33 struct nhlt_vendor_dmic_array_config *cfg_vendor;
34 struct nhlt_fmt *fmt_configs;
35 unsigned int dmic_geo = 0;
42 if (nhlt->header.length <= sizeof(struct acpi_table_header)) {
43 dev_warn(dev, "Invalid DMIC description table\n");
47 for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++,
48 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length)) {
50 if (epnt->linktype != NHLT_LINK_DMIC)
53 cfg = (struct nhlt_dmic_array_config *)(epnt->config.caps);
54 fmt_configs = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
56 /* find max number of channels based on format_configuration */
57 if (fmt_configs->fmt_count) {
58 dev_dbg(dev, "%s: found %d format definitions\n",
59 __func__, fmt_configs->fmt_count);
61 for (i = 0; i < fmt_configs->fmt_count; i++) {
62 struct wav_fmt_ext *fmt_ext;
64 fmt_ext = &fmt_configs->fmt_config[i].fmt_ext;
66 if (fmt_ext->fmt.channels > max_ch)
67 max_ch = fmt_ext->fmt.channels;
69 dev_dbg(dev, "%s: max channels found %d\n", __func__, max_ch);
71 dev_dbg(dev, "%s: No format information found\n", __func__);
74 if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
77 switch (cfg->array_type) {
78 case NHLT_MIC_ARRAY_2CH_SMALL:
79 case NHLT_MIC_ARRAY_2CH_BIG:
80 dmic_geo = MIC_ARRAY_2CH;
83 case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
84 case NHLT_MIC_ARRAY_4CH_L_SHAPED:
85 case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
86 dmic_geo = MIC_ARRAY_4CH;
88 case NHLT_MIC_ARRAY_VENDOR_DEFINED:
89 cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
90 dmic_geo = cfg_vendor->nb_mics;
93 dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
94 __func__, cfg->array_type);
98 dev_dbg(dev, "%s: Array with %d dmics\n", __func__, dmic_geo);
100 if (max_ch > dmic_geo) {
101 dev_dbg(dev, "%s: max channels %d exceed dmic number %d\n",
102 __func__, max_ch, dmic_geo);
107 dev_dbg(dev, "%s: dmic number %d max_ch %d\n",
108 __func__, dmic_geo, max_ch);
112 EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
114 bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type)
116 struct nhlt_endpoint *epnt;
122 epnt = (struct nhlt_endpoint *)nhlt->desc;
123 for (i = 0; i < nhlt->endpoint_count; i++) {
124 if (epnt->linktype == link_type)
127 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
131 EXPORT_SYMBOL(intel_nhlt_has_endpoint_type);
133 static struct nhlt_specific_cfg *
134 nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch,
135 u32 rate, u8 vbps, u8 bps)
137 struct nhlt_fmt_cfg *cfg = fmt->fmt_config;
138 struct wav_fmt *wfmt;
142 dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count);
144 for (i = 0; i < fmt->fmt_count; i++) {
145 wfmt = &cfg->fmt_ext.fmt;
146 _bps = wfmt->bits_per_sample;
147 _vbps = cfg->fmt_ext.sample.valid_bits_per_sample;
149 dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n",
150 wfmt->channels, _vbps, _bps, wfmt->samples_per_sec);
152 if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate &&
153 vbps == _vbps && bps == _bps)
156 cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
162 static bool nhlt_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
163 u32 bus_id, u8 link_type, u8 dir, u8 dev_type)
165 dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
166 epnt->virtual_bus_id, epnt->linktype,
167 epnt->direction, epnt->device_type);
169 if ((epnt->virtual_bus_id != bus_id) ||
170 (epnt->linktype != link_type) ||
171 (epnt->direction != dir))
174 /* link of type DMIC bypasses device_type check */
175 return epnt->linktype == NHLT_LINK_DMIC ||
176 epnt->device_type == dev_type;
179 struct nhlt_specific_cfg *
180 intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt,
181 u32 bus_id, u8 link_type, u8 vbps, u8 bps,
182 u8 num_ch, u32 rate, u8 dir, u8 dev_type)
184 struct nhlt_specific_cfg *cfg;
185 struct nhlt_endpoint *epnt;
186 struct nhlt_fmt *fmt;
192 dev_dbg(dev, "Looking for configuration:\n");
193 dev_dbg(dev, " vbus_id=%d link_type=%d dir=%d, dev_type=%d\n",
194 bus_id, link_type, dir, dev_type);
195 dev_dbg(dev, " ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate);
196 dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count);
198 epnt = (struct nhlt_endpoint *)nhlt->desc;
200 for (i = 0; i < nhlt->endpoint_count; i++) {
201 if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) {
202 fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
204 cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate, vbps, bps);
209 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
214 EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);