sound/soc/intel/skylake/skl-nhlt.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  skl-nhlt.c - Intel SKL Platform NHLT parsing
   4  *
   5  *  Copyright (C) 2015 Intel Corp
   6  *  Author: Sanjiv Kumar <sanjiv.kumar@intel.com>
   7  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  10  */
  11 #include <linux/pci.h>
  12 #include <sound/intel-nhlt.h>
  13 #include "skl.h"
  14 #include "skl-i2s.h"
  15
  16 static struct nhlt_specific_cfg *skl_get_specific_cfg(
  17                 struct device *dev, struct nhlt_fmt *fmt,
  18                 u8 no_ch, u32 rate, u16 bps, u8 linktype)
  19 {
  20         struct nhlt_specific_cfg *sp_config;
  21         struct wav_fmt *wfmt;
  22         struct nhlt_fmt_cfg *fmt_config = fmt->fmt_config;
  23         int i;
  24
  25         dev_dbg(dev, "Format count =%d\n", fmt->fmt_count);
  26
  27         for (i = 0; i < fmt->fmt_count; i++) {
  28                 wfmt = &fmt_config->fmt_ext.fmt;
  29                 dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", wfmt->channels,
  30                          wfmt->bits_per_sample, wfmt->samples_per_sec);
  31                 if (wfmt->channels == no_ch && wfmt->bits_per_sample == bps) {
  32                         /*
  33                          * if link type is dmic ignore rate check as the blob is
  34                          * generic for all rates
  35                          */
  36                         sp_config = &fmt_config->config;
  37                         if (linktype == NHLT_LINK_DMIC)
  38                                 return sp_config;
  39
  40                         if (wfmt->samples_per_sec == rate)
  41                                 return sp_config;
  42                 }
  43
  44                 fmt_config = (struct nhlt_fmt_cfg *)(fmt_config->config.caps +
  45                                                 fmt_config->config.size);
  46         }
  47
  48         return NULL;
  49 }
  50
  51 static void dump_config(struct device *dev, u32 instance_id, u8 linktype,
  52                 u8 s_fmt, u8 num_channels, u32 s_rate, u8 dirn, u16 bps)
  53 {
  54         dev_dbg(dev, "Input configuration\n");
  55         dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", num_channels, s_fmt, s_rate);
  56         dev_dbg(dev, "vbus_id=%d link_type=%d\n", instance_id, linktype);
  57         dev_dbg(dev, "bits_per_sample=%d\n", bps);
  58 }
  59
  60 static bool skl_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
  61                 u32 instance_id, u8 link_type, u8 dirn, u8 dev_type)
  62 {
  63         dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
  64                         epnt->virtual_bus_id, epnt->linktype,
  65                         epnt->direction, epnt->device_type);
  66
  67         if ((epnt->virtual_bus_id == instance_id) &&
  68                         (epnt->linktype == link_type) &&
  69                         (epnt->direction == dirn)) {
  70                 /* do not check dev_type for DMIC link type */
  71                 if (epnt->linktype == NHLT_LINK_DMIC)
  72                         return true;
  73
  74                 if (epnt->device_type == dev_type)
  75                         return true;
  76         }
  77
  78         return false;
  79 }
  80
  81 struct nhlt_specific_cfg
  82 *skl_get_ep_blob(struct skl_dev *skl, u32 instance, u8 link_type,
  83                         u8 s_fmt, u8 num_ch, u32 s_rate,
  84                         u8 dirn, u8 dev_type)
  85 {
  86         struct nhlt_fmt *fmt;
  87         struct nhlt_endpoint *epnt;
  88         struct hdac_bus *bus = skl_to_bus(skl);
  89         struct device *dev = bus->dev;
  90         struct nhlt_specific_cfg *sp_config;
  91         struct nhlt_acpi_table *nhlt = skl->nhlt;
  92         u16 bps = (s_fmt == 16) ? 16 : 32;
  93         u8 j;
  94
  95         dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);
  96
  97         epnt = (struct nhlt_endpoint *)nhlt->desc;
  98
  99         dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);
 100
 101         for (j = 0; j < nhlt->endpoint_count; j++) {
 102                 if (skl_check_ep_match(dev, epnt, instance, link_type,
 103                                                 dirn, dev_type)) {
 104                         fmt = (struct nhlt_fmt *)(epnt->config.caps +
 105                                                  epnt->config.size);
 106                         sp_config = skl_get_specific_cfg(dev, fmt, num_ch,
 107                                                         s_rate, bps, link_type);
 108                         if (sp_config)
 109                                 return sp_config;
 110                 }
 111
 112                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 113         }
 114
 115         return NULL;
 116 }
 117
 118 static void skl_nhlt_trim_space(char *trim)
 119 {
 120         char *s = trim;
 121         int cnt;
 122         int i;
 123
 124         cnt = 0;
 125         for (i = 0; s[i]; i++) {
 126                 if (!isspace(s[i]))
 127                         s[cnt++] = s[i];
 128         }
 129
 130         s[cnt] = '\0';
 131 }
 132
 133 int skl_nhlt_update_topology_bin(struct skl_dev *skl)
 134 {
 135         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 136         struct hdac_bus *bus = skl_to_bus(skl);
 137         struct device *dev = bus->dev;
 138
 139         dev_dbg(dev, "oem_id %.6s, oem_table_id %.8s oem_revision %d\n",
 140                 nhlt->header.oem_id, nhlt->header.oem_table_id,
 141                 nhlt->header.oem_revision);
 142
 143         snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s",
 144                 skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id,
 145                 nhlt->header.oem_revision, "-tplg.bin");
 146
 147         skl_nhlt_trim_space(skl->tplg_name);
 148
 149         return 0;
 150 }
 151
 152 static ssize_t skl_nhlt_platform_id_show(struct device *dev,
 153                         struct device_attribute *attr, char *buf)
 154 {
 155         struct pci_dev *pci = to_pci_dev(dev);
 156         struct hdac_bus *bus = pci_get_drvdata(pci);
 157         struct skl_dev *skl = bus_to_skl(bus);
 158         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 159         char platform_id[32];
 160
 161         sprintf(platform_id, "%x-%.6s-%.8s-%d", skl->pci_id,
 162                         nhlt->header.oem_id, nhlt->header.oem_table_id,
 163                         nhlt->header.oem_revision);
 164
 165         skl_nhlt_trim_space(platform_id);
 166         return sprintf(buf, "%s\n", platform_id);
 167 }
 168
 169 static DEVICE_ATTR(platform_id, 0444, skl_nhlt_platform_id_show, NULL);
 170
 171 int skl_nhlt_create_sysfs(struct skl_dev *skl)
 172 {
 173         struct device *dev = &skl->pci->dev;
 174
 175         if (sysfs_create_file(&dev->kobj, &dev_attr_platform_id.attr))
 176                 dev_warn(dev, "Error creating sysfs entry\n");
 177
 178         return 0;
 179 }
 180
 181 void skl_nhlt_remove_sysfs(struct skl_dev *skl)
 182 {
 183         struct device *dev = &skl->pci->dev;
 184
 185         if (skl->nhlt)
 186                 sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr);
 187 }
 188
 189 /*
 190  * Queries NHLT for all the fmt configuration for a particular endpoint and
 191  * stores all possible rates supported in a rate table for the corresponding
 192  * sclk/sclkfs.
 193  */
 194 static void skl_get_ssp_clks(struct skl_dev *skl, struct skl_ssp_clk *ssp_clks,
 195                                 struct nhlt_fmt *fmt, u8 id)
 196 {
 197         struct skl_i2s_config_blob_ext *i2s_config_ext;
 198         struct skl_i2s_config_blob_legacy *i2s_config;
 199         struct skl_clk_parent_src *parent;
 200         struct skl_ssp_clk *sclk, *sclkfs;
 201         struct nhlt_fmt_cfg *fmt_cfg;
 202         struct wav_fmt_ext *wav_fmt;
 203         unsigned long rate;
 204         bool present = false;
 205         int rate_index = 0;
 206         u16 channels, bps;
 207         u8 clk_src;
 208         int i, j;
 209         u32 fs;
 210
 211         sclk = &ssp_clks[SKL_SCLK_OFS];
 212         sclkfs = &ssp_clks[SKL_SCLKFS_OFS];
 213
 214         if (fmt->fmt_count == 0)
 215                 return;
 216
 217         for (i = 0; i < fmt->fmt_count; i++) {
 218                 fmt_cfg = &fmt->fmt_config[i];
 219                 wav_fmt = &fmt_cfg->fmt_ext;
 220
 221                 channels = wav_fmt->fmt.channels;
 222                 bps = wav_fmt->fmt.bits_per_sample;
 223                 fs = wav_fmt->fmt.samples_per_sec;
 224
 225                 /*
 226                  * In case of TDM configuration on a ssp, there can
 227                  * be more than one blob in which channel masks are
 228                  * different for each usecase for a specific rate and bps.
 229                  * But the sclk rate will be generated for the total
 230                  * number of channels used for that endpoint.
 231                  *
 232                  * So for the given fs and bps, choose blob which has
 233                  * the superset of all channels for that endpoint and
 234                  * derive the rate.
 235                  */
 236                 for (j = i; j < fmt->fmt_count; j++) {
 237                         fmt_cfg = &fmt->fmt_config[j];
 238                         wav_fmt = &fmt_cfg->fmt_ext;
 239                         if ((fs == wav_fmt->fmt.samples_per_sec) &&
 240                            (bps == wav_fmt->fmt.bits_per_sample))
 241                                 channels = max_t(u16, channels,
 242                                                 wav_fmt->fmt.channels);
 243                 }
 244
 245                 rate = channels * bps * fs;
 246
 247                 /* check if the rate is added already to the given SSP's sclk */
 248                 for (j = 0; (j < SKL_MAX_CLK_RATES) &&
 249                             (sclk[id].rate_cfg[j].rate != 0); j++) {
 250                         if (sclk[id].rate_cfg[j].rate == rate) {
 251                                 present = true;
 252                                 break;
 253                         }
 254                 }
 255
 256                 /* Fill rate and parent for sclk/sclkfs */
 257                 if (!present) {
 258                         i2s_config_ext = (struct skl_i2s_config_blob_ext *)
 259                                                 fmt->fmt_config[0].config.caps;
 260
 261                         /* MCLK Divider Source Select */
 262                         if (is_legacy_blob(i2s_config_ext->hdr.sig)) {
 263                                 i2s_config = ext_to_legacy_blob(i2s_config_ext);
 264                                 clk_src = get_clk_src(i2s_config->mclk,
 265                                                 SKL_MNDSS_DIV_CLK_SRC_MASK);
 266                         } else {
 267                                 clk_src = get_clk_src(i2s_config_ext->mclk,
 268                                                 SKL_MNDSS_DIV_CLK_SRC_MASK);
 269                         }
 270
 271                         parent = skl_get_parent_clk(clk_src);
 272
 273                         /*
 274                          * Do not copy the config data if there is no parent
 275                          * clock available for this clock source select
 276                          */
 277                         if (!parent)
 278                                 continue;
 279
 280                         sclk[id].rate_cfg[rate_index].rate = rate;
 281                         sclk[id].rate_cfg[rate_index].config = fmt_cfg;
 282                         sclkfs[id].rate_cfg[rate_index].rate = rate;
 283                         sclkfs[id].rate_cfg[rate_index].config = fmt_cfg;
 284                         sclk[id].parent_name = parent->name;
 285                         sclkfs[id].parent_name = parent->name;
 286
 287                         rate_index++;
 288                 }
 289         }
 290 }
 291
 292 static void skl_get_mclk(struct skl_dev *skl, struct skl_ssp_clk *mclk,
 293                                 struct nhlt_fmt *fmt, u8 id)
 294 {
 295         struct skl_i2s_config_blob_ext *i2s_config_ext;
 296         struct skl_i2s_config_blob_legacy *i2s_config;
 297         struct nhlt_specific_cfg *fmt_cfg;
 298         struct skl_clk_parent_src *parent;
 299         u32 clkdiv, div_ratio;
 300         u8 clk_src;
 301
 302         fmt_cfg = &fmt->fmt_config[0].config;
 303         i2s_config_ext = (struct skl_i2s_config_blob_ext *)fmt_cfg->caps;
 304
 305         /* MCLK Divider Source Select and divider */
 306         if (is_legacy_blob(i2s_config_ext->hdr.sig)) {
 307                 i2s_config = ext_to_legacy_blob(i2s_config_ext);
 308                 clk_src = get_clk_src(i2s_config->mclk,
 309                                 SKL_MCLK_DIV_CLK_SRC_MASK);
 310                 clkdiv = i2s_config->mclk.mdivr &
 311                                 SKL_MCLK_DIV_RATIO_MASK;
 312         } else {
 313                 clk_src = get_clk_src(i2s_config_ext->mclk,
 314                                 SKL_MCLK_DIV_CLK_SRC_MASK);
 315                 clkdiv = i2s_config_ext->mclk.mdivr[0] &
 316                                 SKL_MCLK_DIV_RATIO_MASK;
 317         }
 318
 319         /* bypass divider */
 320         div_ratio = 1;
 321
 322         if (clkdiv != SKL_MCLK_DIV_RATIO_MASK)
 323                 /* Divider is 2 + clkdiv */
 324                 div_ratio = clkdiv + 2;
 325
 326         /* Calculate MCLK rate from source using div value */
 327         parent = skl_get_parent_clk(clk_src);
 328         if (!parent)
 329                 return;
 330
 331         mclk[id].rate_cfg[0].rate = parent->rate/div_ratio;
 332         mclk[id].rate_cfg[0].config = &fmt->fmt_config[0];
 333         mclk[id].parent_name = parent->name;
 334 }
 335
 336 void skl_get_clks(struct skl_dev *skl, struct skl_ssp_clk *ssp_clks)
 337 {
 338         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 339         struct nhlt_endpoint *epnt;
 340         struct nhlt_fmt *fmt;
 341         int i;
 342         u8 id;
 343
 344         epnt = (struct nhlt_endpoint *)nhlt->desc;
 345         for (i = 0; i < nhlt->endpoint_count; i++) {
 346                 if (epnt->linktype == NHLT_LINK_SSP) {
 347                         id = epnt->virtual_bus_id;
 348
 349                         fmt = (struct nhlt_fmt *)(epnt->config.caps
 350                                         + epnt->config.size);
 351
 352                         skl_get_ssp_clks(skl, ssp_clks, fmt, id);
 353                         skl_get_mclk(skl, ssp_clks, fmt, id);
 354                 }
 355                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 356         }
 357 }