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                         struct nhlt_fmt_cfg *fmt_cfg = fmt_configs->fmt_config;
  59
  60                         dev_dbg(dev, "found %d format definitions\n",
  61                                 fmt_configs->fmt_count);
  62
  63                         for (i = 0; i < fmt_configs->fmt_count; i++) {
  64                                 struct wav_fmt_ext *fmt_ext;
  65
  66                                 fmt_ext = &fmt_cfg->fmt_ext;
  67
  68                                 if (fmt_ext->fmt.channels > max_ch)
  69                                         max_ch = fmt_ext->fmt.channels;
  70
  71                                 /* Move to the next nhlt_fmt_cfg */
  72                                 fmt_cfg = (struct nhlt_fmt_cfg *)(fmt_cfg->config.caps +
  73                                                                   fmt_cfg->config.size);
  74                         }
  75                         dev_dbg(dev, "max channels found %d\n", max_ch);
  76                 } else {
  77                         dev_dbg(dev, "No format information found\n");
  78                 }
  79
  80                 if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
  81                         dmic_geo = max_ch;
  82                 } else {
  83                         switch (cfg->array_type) {
  84                         case NHLT_MIC_ARRAY_2CH_SMALL:
  85                         case NHLT_MIC_ARRAY_2CH_BIG:
  86                                 dmic_geo = MIC_ARRAY_2CH;
  87                                 break;
  88
  89                         case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
  90                         case NHLT_MIC_ARRAY_4CH_L_SHAPED:
  91                         case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
  92                                 dmic_geo = MIC_ARRAY_4CH;
  93                                 break;
  94                         case NHLT_MIC_ARRAY_VENDOR_DEFINED:
  95                                 cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
  96                                 dmic_geo = cfg_vendor->nb_mics;
  97                                 break;
  98                         default:
  99                                 dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
 100                                          __func__, cfg->array_type);
 101                         }
 102
 103                         if (dmic_geo > 0) {
 104                                 dev_dbg(dev, "Array with %d dmics\n", dmic_geo);
 105                         }
 106                         if (max_ch > dmic_geo) {
 107                                 dev_dbg(dev, "max channels %d exceed dmic number %d\n",
 108                                         max_ch, dmic_geo);
 109                         }
 110                 }
 111         }
 112
 113         dev_dbg(dev, "dmic number %d max_ch %d\n", dmic_geo, max_ch);
 114
 115         return dmic_geo;
 116 }
 117 EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
 118
 119 bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type)
 120 {
 121         struct nhlt_endpoint *epnt;
 122         int i;
 123
 124         if (!nhlt)
 125                 return false;
 126
 127         epnt = (struct nhlt_endpoint *)nhlt->desc;
 128         for (i = 0; i < nhlt->endpoint_count; i++) {
 129                 if (epnt->linktype == link_type)
 130                         return true;
 131
 132                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 133         }
 134         return false;
 135 }
 136 EXPORT_SYMBOL(intel_nhlt_has_endpoint_type);
 137
 138 int intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table *nhlt, u8 device_type)
 139 {
 140         struct nhlt_endpoint *epnt;
 141         int ssp_mask = 0;
 142         int i;
 143
 144         if (!nhlt || (device_type != NHLT_DEVICE_BT && device_type != NHLT_DEVICE_I2S))
 145                 return 0;
 146
 147         epnt = (struct nhlt_endpoint *)nhlt->desc;
 148         for (i = 0; i < nhlt->endpoint_count; i++) {
 149                 if (epnt->linktype == NHLT_LINK_SSP && epnt->device_type == device_type) {
 150                         /* for SSP the virtual bus id is the SSP port */
 151                         ssp_mask |= BIT(epnt->virtual_bus_id);
 152                 }
 153                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 154         }
 155
 156         return ssp_mask;
 157 }
 158 EXPORT_SYMBOL(intel_nhlt_ssp_endpoint_mask);
 159
 160 #define SSP_BLOB_V1_0_SIZE              84
 161 #define SSP_BLOB_V1_0_MDIVC_OFFSET      19 /* offset in u32 */
 162
 163 #define SSP_BLOB_V1_5_SIZE              96
 164 #define SSP_BLOB_V1_5_MDIVC_OFFSET      21 /* offset in u32 */
 165 #define SSP_BLOB_VER_1_5                0xEE000105
 166
 167 #define SSP_BLOB_V2_0_SIZE              88
 168 #define SSP_BLOB_V2_0_MDIVC_OFFSET      20 /* offset in u32 */
 169 #define SSP_BLOB_VER_2_0                0xEE000200
 170
 171 int intel_nhlt_ssp_mclk_mask(struct nhlt_acpi_table *nhlt, int ssp_num)
 172 {
 173         struct nhlt_endpoint *epnt;
 174         struct nhlt_fmt *fmt;
 175         struct nhlt_fmt_cfg *cfg;
 176         int mclk_mask = 0;
 177         int i, j;
 178
 179         if (!nhlt)
 180                 return 0;
 181
 182         epnt = (struct nhlt_endpoint *)nhlt->desc;
 183         for (i = 0; i < nhlt->endpoint_count; i++) {
 184
 185                 /* we only care about endpoints connected to an audio codec over SSP */
 186                 if (epnt->linktype == NHLT_LINK_SSP &&
 187                     epnt->device_type == NHLT_DEVICE_I2S &&
 188                     epnt->virtual_bus_id == ssp_num) {
 189
 190                         fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
 191                         cfg = fmt->fmt_config;
 192
 193                         /*
 194                          * In theory all formats should use the same MCLK but it doesn't hurt to
 195                          * double-check that the configuration is consistent
 196                          */
 197                         for (j = 0; j < fmt->fmt_count; j++) {
 198                                 u32 *blob;
 199                                 int mdivc_offset;
 200                                 int size;
 201
 202                                 /* first check we have enough data to read the blob type */
 203                                 if (cfg->config.size < 8)
 204                                         return -EINVAL;
 205
 206                                 blob = (u32 *)cfg->config.caps;
 207
 208                                 if (blob[1] == SSP_BLOB_VER_2_0) {
 209                                         mdivc_offset = SSP_BLOB_V2_0_MDIVC_OFFSET;
 210                                         size = SSP_BLOB_V2_0_SIZE;
 211                                 } else if (blob[1] == SSP_BLOB_VER_1_5) {
 212                                         mdivc_offset = SSP_BLOB_V1_5_MDIVC_OFFSET;
 213                                         size = SSP_BLOB_V1_5_SIZE;
 214                                 } else {
 215                                         mdivc_offset = SSP_BLOB_V1_0_MDIVC_OFFSET;
 216                                         size = SSP_BLOB_V1_0_SIZE;
 217                                 }
 218
 219                                 /* make sure we have enough data for the fixed part of the blob */
 220                                 if (cfg->config.size < size)
 221                                         return -EINVAL;
 222
 223                                 mclk_mask |=  blob[mdivc_offset] & GENMASK(1, 0);
 224
 225                                 cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
 226                         }
 227                 }
 228                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 229         }
 230
 231         /* make sure only one MCLK is used */
 232         if (hweight_long(mclk_mask) != 1)
 233                 return -EINVAL;
 234
 235         return mclk_mask;
 236 }
 237 EXPORT_SYMBOL(intel_nhlt_ssp_mclk_mask);
 238
 239 static struct nhlt_specific_cfg *
 240 nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch,
 241                       u32 rate, u8 vbps, u8 bps, bool ignore_vbps)
 242 {
 243         struct nhlt_fmt_cfg *cfg = fmt->fmt_config;
 244         struct wav_fmt *wfmt;
 245         u16 _bps, _vbps;
 246         int i;
 247
 248         dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count);
 249
 250         for (i = 0; i < fmt->fmt_count; i++) {
 251                 wfmt = &cfg->fmt_ext.fmt;
 252                 _bps = wfmt->bits_per_sample;
 253                 _vbps = cfg->fmt_ext.sample.valid_bits_per_sample;
 254
 255                 dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n",
 256                         wfmt->channels, _vbps, _bps, wfmt->samples_per_sec);
 257
 258                 /*
 259                  * When looking for exact match of configuration ignore the vbps
 260                  * from NHLT table when ignore_vbps is true
 261                  */
 262                 if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate &&
 263                     (ignore_vbps || vbps == _vbps) && bps == _bps)
 264                         return &cfg->config;
 265
 266                 cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
 267         }
 268
 269         return NULL;
 270 }
 271
 272 static bool nhlt_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
 273                                 u32 bus_id, u8 link_type, u8 dir, u8 dev_type)
 274 {
 275         dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
 276                 epnt->virtual_bus_id, epnt->linktype,
 277                 epnt->direction, epnt->device_type);
 278
 279         if ((epnt->virtual_bus_id != bus_id) ||
 280             (epnt->linktype != link_type) ||
 281             (epnt->direction != dir))
 282                 return false;
 283
 284         /* link of type DMIC bypasses device_type check */
 285         return epnt->linktype == NHLT_LINK_DMIC ||
 286                epnt->device_type == dev_type;
 287 }
 288
 289 struct nhlt_specific_cfg *
 290 intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt,
 291                              u32 bus_id, u8 link_type, u8 vbps, u8 bps,
 292                              u8 num_ch, u32 rate, u8 dir, u8 dev_type)
 293 {
 294         struct nhlt_specific_cfg *cfg;
 295         struct nhlt_endpoint *epnt;
 296         bool ignore_vbps = false;
 297         struct nhlt_fmt *fmt;
 298         int i;
 299
 300         if (!nhlt)
 301                 return NULL;
 302
 303         dev_dbg(dev, "Looking for configuration:\n");
 304         dev_dbg(dev, "  vbus_id=%d link_type=%d dir=%d, dev_type=%d\n",
 305                 bus_id, link_type, dir, dev_type);
 306         if (link_type == NHLT_LINK_DMIC && bps == 32 && (vbps == 24 || vbps == 32)) {
 307                 /*
 308                  * The DMIC hardware supports only one type of 32 bits sample
 309                  * size, which is 24 bit sampling on the MSB side and bits[1:0]
 310                  * are used for indicating the channel number.
 311                  * It has been observed that some NHLT tables have the vbps
 312                  * specified as 32 while some uses 24.
 313                  * The format these variations describe are identical, the
 314                  * hardware is configured and behaves the same way.
 315                  * Note: when the samples assumed to be vbps=32 then the 'noise'
 316                  * introduced by the lower two bits (channel number) have no
 317                  * real life implication on audio quality.
 318                  */
 319                 dev_dbg(dev,
 320                         "  ch=%d fmt=%d rate=%d (vbps is ignored for DMIC 32bit format)\n",
 321                         num_ch, bps, rate);
 322                 ignore_vbps = true;
 323         } else {
 324                 dev_dbg(dev, "  ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate);
 325         }
 326         dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count);
 327
 328         epnt = (struct nhlt_endpoint *)nhlt->desc;
 329
 330         for (i = 0; i < nhlt->endpoint_count; i++) {
 331                 if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) {
 332                         fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
 333
 334                         cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate,
 335                                                     vbps, bps, ignore_vbps);
 336                         if (cfg)
 337                                 return cfg;
 338                 }
 339
 340                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 341         }
 342
 343         return NULL;
 344 }
 345 EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);