sound/hda/intel-nhlt.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 // Copyright (c) 2015-2019 Intel Corporation
   3
   4 #include <linux/acpi.h>
   5 #include <sound/intel-nhlt.h>
   6
   7 struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
   8 {
   9         struct nhlt_acpi_table *nhlt;
  10         acpi_status status;
  11
  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");
  16                 return NULL;
  17         }
  18
  19         return nhlt;
  20 }
  21 EXPORT_SYMBOL_GPL(intel_nhlt_init);
  22
  23 void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
  24 {
  25         acpi_put_table((struct acpi_table_header *)nhlt);
  26 }
  27 EXPORT_SYMBOL_GPL(intel_nhlt_free);
  28
  29 int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
  30 {
  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;
  36         u16 max_ch = 0;
  37         u8 i, j;
  38
  39         if (!nhlt)
  40                 return 0;
  41
  42         if (nhlt->header.length <= sizeof(struct acpi_table_header)) {
  43                 dev_warn(dev, "Invalid DMIC description table\n");
  44                 return 0;
  45         }
  46
  47         for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++,
  48              epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length)) {
  49
  50                 if (epnt->linktype != NHLT_LINK_DMIC)
  51                         continue;
  52
  53                 cfg = (struct nhlt_dmic_array_config  *)(epnt->config.caps);
  54                 fmt_configs = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
  55
  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);
  60
  61                         for (i = 0; i < fmt_configs->fmt_count; i++) {
  62                                 struct wav_fmt_ext *fmt_ext;
  63
  64                                 fmt_ext = &fmt_configs->fmt_config[i].fmt_ext;
  65
  66                                 if (fmt_ext->fmt.channels > max_ch)
  67                                         max_ch = fmt_ext->fmt.channels;
  68                         }
  69                         dev_dbg(dev, "%s: max channels found %d\n", __func__, max_ch);
  70                 } else {
  71                         dev_dbg(dev, "%s: No format information found\n", __func__);
  72                 }
  73
  74                 if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
  75                         dmic_geo = max_ch;
  76                 } else {
  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;
  81                                 break;
  82
  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;
  87                                 break;
  88                         case NHLT_MIC_ARRAY_VENDOR_DEFINED:
  89                                 cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
  90                                 dmic_geo = cfg_vendor->nb_mics;
  91                                 break;
  92                         default:
  93                                 dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
  94                                          __func__, cfg->array_type);
  95                         }
  96
  97                         if (dmic_geo > 0) {
  98                                 dev_dbg(dev, "%s: Array with %d dmics\n", __func__, dmic_geo);
  99                         }
 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);
 103                         }
 104                 }
 105         }
 106
 107         dev_dbg(dev, "%s: dmic number %d max_ch %d\n",
 108                 __func__, dmic_geo, max_ch);
 109
 110         return dmic_geo;
 111 }
 112 EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
 113
 114 bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type)
 115 {
 116         struct nhlt_endpoint *epnt;
 117         int i;
 118
 119         if (!nhlt)
 120                 return false;
 121
 122         epnt = (struct nhlt_endpoint *)nhlt->desc;
 123         for (i = 0; i < nhlt->endpoint_count; i++) {
 124                 if (epnt->linktype == link_type)
 125                         return true;
 126
 127                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 128         }
 129         return false;
 130 }
 131 EXPORT_SYMBOL(intel_nhlt_has_endpoint_type);
 132
 133 int intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table *nhlt, u8 device_type)
 134 {
 135         struct nhlt_endpoint *epnt;
 136         int ssp_mask = 0;
 137         int i;
 138
 139         if (!nhlt || (device_type != NHLT_DEVICE_BT && device_type != NHLT_DEVICE_I2S))
 140                 return 0;
 141
 142         epnt = (struct nhlt_endpoint *)nhlt->desc;
 143         for (i = 0; i < nhlt->endpoint_count; i++) {
 144                 if (epnt->linktype == NHLT_LINK_SSP && epnt->device_type == device_type) {
 145                         /* for SSP the virtual bus id is the SSP port */
 146                         ssp_mask |= BIT(epnt->virtual_bus_id);
 147                 }
 148                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 149         }
 150
 151         return ssp_mask;
 152 }
 153 EXPORT_SYMBOL(intel_nhlt_ssp_endpoint_mask);
 154
 155 static struct nhlt_specific_cfg *
 156 nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch,
 157                       u32 rate, u8 vbps, u8 bps)
 158 {
 159         struct nhlt_fmt_cfg *cfg = fmt->fmt_config;
 160         struct wav_fmt *wfmt;
 161         u16 _bps, _vbps;
 162         int i;
 163
 164         dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count);
 165
 166         for (i = 0; i < fmt->fmt_count; i++) {
 167                 wfmt = &cfg->fmt_ext.fmt;
 168                 _bps = wfmt->bits_per_sample;
 169                 _vbps = cfg->fmt_ext.sample.valid_bits_per_sample;
 170
 171                 dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n",
 172                         wfmt->channels, _vbps, _bps, wfmt->samples_per_sec);
 173
 174                 if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate &&
 175                     vbps == _vbps && bps == _bps)
 176                         return &cfg->config;
 177
 178                 cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
 179         }
 180
 181         return NULL;
 182 }
 183
 184 static bool nhlt_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
 185                                 u32 bus_id, u8 link_type, u8 dir, u8 dev_type)
 186 {
 187         dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
 188                 epnt->virtual_bus_id, epnt->linktype,
 189                 epnt->direction, epnt->device_type);
 190
 191         if ((epnt->virtual_bus_id != bus_id) ||
 192             (epnt->linktype != link_type) ||
 193             (epnt->direction != dir))
 194                 return false;
 195
 196         /* link of type DMIC bypasses device_type check */
 197         return epnt->linktype == NHLT_LINK_DMIC ||
 198                epnt->device_type == dev_type;
 199 }
 200
 201 struct nhlt_specific_cfg *
 202 intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt,
 203                              u32 bus_id, u8 link_type, u8 vbps, u8 bps,
 204                              u8 num_ch, u32 rate, u8 dir, u8 dev_type)
 205 {
 206         struct nhlt_specific_cfg *cfg;
 207         struct nhlt_endpoint *epnt;
 208         struct nhlt_fmt *fmt;
 209         int i;
 210
 211         if (!nhlt)
 212                 return NULL;
 213
 214         dev_dbg(dev, "Looking for configuration:\n");
 215         dev_dbg(dev, "  vbus_id=%d link_type=%d dir=%d, dev_type=%d\n",
 216                 bus_id, link_type, dir, dev_type);
 217         dev_dbg(dev, "  ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate);
 218         dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count);
 219
 220         epnt = (struct nhlt_endpoint *)nhlt->desc;
 221
 222         for (i = 0; i < nhlt->endpoint_count; i++) {
 223                 if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) {
 224                         fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
 225
 226                         cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate, vbps, bps);
 227                         if (cfg)
 228                                 return cfg;
 229                 }
 230
 231                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 232         }
 233
 234         return NULL;
 235 }
 236 EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);