LXR linux/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
  16static 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
  51static 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
  60static 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
  81struct 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
 118static 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
 133int 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
 152static 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
 169static DEVICE_ATTR(platform_id, 0444, skl_nhlt_platform_id_show, NULL);
 170
 171int 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
 181void 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 */
 194static 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
 292static 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
 336void 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}
 358