sound/hda/hdmi

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
hdmi_pin_set_slot_channel
hdmi_pin_get_slot_channel
hdmi_get_channel_count
hdmi_set_channel_count
init_channel_allocations
get_channel_allocation_order
snd_hdac_print_channel_allocation
hdmi_channel_allocation_spk_alloc_blk
hdmi_debug_channel_mapping
hdmi_std_setup_channel_mapping
snd_hdac_chmap_to_spk_mask
to_cea_slot
snd_hdac_spk_to_chmap
from_cea_slot
hdmi_manual_channel_allocation
hdmi_manual_setup_channel_mapping
hdmi_setup_fake_chmap
snd_hdac_setup_channel_mapping
snd_hdac_get_active_channels
snd_hdac_get_ch_alloc_from_ca
snd_hdac_channel_allocation
hdmi_chmap_ctl_info
hdmi_chmap_cea_alloc_validate_get_type
hdmi_cea_alloc_to_tlv_chmap
spk_mask_from_spk_alloc
hdmi_chmap_ctl_tlv
hdmi_chmap_ctl_get
hdmi_chmap_ctl_put
snd_hdac_register_chmap_ops
snd_hdac_add_chmap_ctls
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * HDMI Channel map support helpers
   4  */
   5 
   6 #include <linux/module.h>
   7 #include <sound/control.h>
   8 #include <sound/tlv.h>
   9 #include <sound/hda_chmap.h>
  10 
  11 /*
  12  * CEA speaker placement:
  13  *
  14  *        FLH       FCH        FRH
  15  *  FLW    FL  FLC   FC   FRC   FR   FRW
  16  *
  17  *                                  LFE
  18  *                     TC
  19  *
  20  *          RL  RLC   RC   RRC   RR
  21  *
  22  * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M corresponds to
  23  * CEA RL/RR; The SMPTE channel _assignment_ C/LFE is swapped to CEA LFE/FC.
  24  */
  25 enum cea_speaker_placement {
  26         FL  = (1 <<  0),        /* Front Left           */
  27         FC  = (1 <<  1),        /* Front Center         */
  28         FR  = (1 <<  2),        /* Front Right          */
  29         FLC = (1 <<  3),        /* Front Left Center    */
  30         FRC = (1 <<  4),        /* Front Right Center   */
  31         RL  = (1 <<  5),        /* Rear Left            */
  32         RC  = (1 <<  6),        /* Rear Center          */
  33         RR  = (1 <<  7),        /* Rear Right           */
  34         RLC = (1 <<  8),        /* Rear Left Center     */
  35         RRC = (1 <<  9),        /* Rear Right Center    */
  36         LFE = (1 << 10),        /* Low Frequency Effect */
  37         FLW = (1 << 11),        /* Front Left Wide      */
  38         FRW = (1 << 12),        /* Front Right Wide     */
  39         FLH = (1 << 13),        /* Front Left High      */
  40         FCH = (1 << 14),        /* Front Center High    */
  41         FRH = (1 << 15),        /* Front Right High     */
  42         TC  = (1 << 16),        /* Top Center           */
  43 };
  44 
  45 static const char * const cea_speaker_allocation_names[] = {
  46         /*  0 */ "FL/FR",
  47         /*  1 */ "LFE",
  48         /*  2 */ "FC",
  49         /*  3 */ "RL/RR",
  50         /*  4 */ "RC",
  51         /*  5 */ "FLC/FRC",
  52         /*  6 */ "RLC/RRC",
  53         /*  7 */ "FLW/FRW",
  54         /*  8 */ "FLH/FRH",
  55         /*  9 */ "TC",
  56         /* 10 */ "FCH",
  57 };
  58 
  59 /*
  60  * ELD SA bits in the CEA Speaker Allocation data block
  61  */
  62 static int eld_speaker_allocation_bits[] = {
  63         [0] = FL | FR,
  64         [1] = LFE,
  65         [2] = FC,
  66         [3] = RL | RR,
  67         [4] = RC,
  68         [5] = FLC | FRC,
  69         [6] = RLC | RRC,
  70         /* the following are not defined in ELD yet */
  71         [7] = FLW | FRW,
  72         [8] = FLH | FRH,
  73         [9] = TC,
  74         [10] = FCH,
  75 };
  76 
  77 /*
  78  * ALSA sequence is:
  79  *
  80  *       surround40   surround41   surround50   surround51   surround71
  81  * ch0   front left   =            =            =            =
  82  * ch1   front right  =            =            =            =
  83  * ch2   rear left    =            =            =            =
  84  * ch3   rear right   =            =            =            =
  85  * ch4                LFE          center       center       center
  86  * ch5                                          LFE          LFE
  87  * ch6                                                       side left
  88  * ch7                                                       side right
  89  *
  90  * surround71 = {FL, FR, RLC, RRC, FC, LFE, RL, RR}
  91  */
  92 static int hdmi_channel_mapping[0x32][8] = {
  93         /* stereo */
  94         [0x00] = { 0x00, 0x11, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 },
  95         /* 2.1 */
  96         [0x01] = { 0x00, 0x11, 0x22, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 },
  97         /* Dolby Surround */
  98         [0x02] = { 0x00, 0x11, 0x23, 0xf2, 0xf4, 0xf5, 0xf6, 0xf7 },
  99         /* surround40 */
 100         [0x08] = { 0x00, 0x11, 0x24, 0x35, 0xf3, 0xf2, 0xf6, 0xf7 },
 101         /* 4ch */
 102         [0x03] = { 0x00, 0x11, 0x23, 0x32, 0x44, 0xf5, 0xf6, 0xf7 },
 103         /* surround41 */
 104         [0x09] = { 0x00, 0x11, 0x24, 0x35, 0x42, 0xf3, 0xf6, 0xf7 },
 105         /* surround50 */
 106         [0x0a] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0xf2, 0xf6, 0xf7 },
 107         /* surround51 */
 108         [0x0b] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0x52, 0xf6, 0xf7 },
 109         /* 7.1 */
 110         [0x13] = { 0x00, 0x11, 0x26, 0x37, 0x43, 0x52, 0x64, 0x75 },
 111 };
 112 
 113 /*
 114  * This is an ordered list!
 115  *
 116  * The preceding ones have better chances to be selected by
 117  * hdmi_channel_allocation().
 118  */
 119 static struct hdac_cea_channel_speaker_allocation channel_allocations[] = {
 120 /*                        channel:   7     6    5    4    3     2    1    0  */
 121 { .ca_index = 0x00,  .speakers = {   0,    0,   0,   0,   0,    0,  FR,  FL } },
 122                                  /* 2.1 */
 123 { .ca_index = 0x01,  .speakers = {   0,    0,   0,   0,   0,  LFE,  FR,  FL } },
 124                                  /* Dolby Surround */
 125 { .ca_index = 0x02,  .speakers = {   0,    0,   0,   0,  FC,    0,  FR,  FL } },
 126                                  /* surround40 */
 127 { .ca_index = 0x08,  .speakers = {   0,    0,  RR,  RL,   0,    0,  FR,  FL } },
 128                                  /* surround41 */
 129 { .ca_index = 0x09,  .speakers = {   0,    0,  RR,  RL,   0,  LFE,  FR,  FL } },
 130                                  /* surround50 */
 131 { .ca_index = 0x0a,  .speakers = {   0,    0,  RR,  RL,  FC,    0,  FR,  FL } },
 132                                  /* surround51 */
 133 { .ca_index = 0x0b,  .speakers = {   0,    0,  RR,  RL,  FC,  LFE,  FR,  FL } },
 134                                  /* 6.1 */
 135 { .ca_index = 0x0f,  .speakers = {   0,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
 136                                  /* surround71 */
 137 { .ca_index = 0x13,  .speakers = { RRC,  RLC,  RR,  RL,  FC,  LFE,  FR,  FL } },
 138 
 139 { .ca_index = 0x03,  .speakers = {   0,    0,   0,   0,  FC,  LFE,  FR,  FL } },
 140 { .ca_index = 0x04,  .speakers = {   0,    0,   0,  RC,   0,    0,  FR,  FL } },
 141 { .ca_index = 0x05,  .speakers = {   0,    0,   0,  RC,   0,  LFE,  FR,  FL } },
 142 { .ca_index = 0x06,  .speakers = {   0,    0,   0,  RC,  FC,    0,  FR,  FL } },
 143 { .ca_index = 0x07,  .speakers = {   0,    0,   0,  RC,  FC,  LFE,  FR,  FL } },
 144 { .ca_index = 0x0c,  .speakers = {   0,   RC,  RR,  RL,   0,    0,  FR,  FL } },
 145 { .ca_index = 0x0d,  .speakers = {   0,   RC,  RR,  RL,   0,  LFE,  FR,  FL } },
 146 { .ca_index = 0x0e,  .speakers = {   0,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
 147 { .ca_index = 0x10,  .speakers = { RRC,  RLC,  RR,  RL,   0,    0,  FR,  FL } },
 148 { .ca_index = 0x11,  .speakers = { RRC,  RLC,  RR,  RL,   0,  LFE,  FR,  FL } },
 149 { .ca_index = 0x12,  .speakers = { RRC,  RLC,  RR,  RL,  FC,    0,  FR,  FL } },
 150 { .ca_index = 0x14,  .speakers = { FRC,  FLC,   0,   0,   0,    0,  FR,  FL } },
 151 { .ca_index = 0x15,  .speakers = { FRC,  FLC,   0,   0,   0,  LFE,  FR,  FL } },
 152 { .ca_index = 0x16,  .speakers = { FRC,  FLC,   0,   0,  FC,    0,  FR,  FL } },
 153 { .ca_index = 0x17,  .speakers = { FRC,  FLC,   0,   0,  FC,  LFE,  FR,  FL } },
 154 { .ca_index = 0x18,  .speakers = { FRC,  FLC,   0,  RC,   0,    0,  FR,  FL } },
 155 { .ca_index = 0x19,  .speakers = { FRC,  FLC,   0,  RC,   0,  LFE,  FR,  FL } },
 156 { .ca_index = 0x1a,  .speakers = { FRC,  FLC,   0,  RC,  FC,    0,  FR,  FL } },
 157 { .ca_index = 0x1b,  .speakers = { FRC,  FLC,   0,  RC,  FC,  LFE,  FR,  FL } },
 158 { .ca_index = 0x1c,  .speakers = { FRC,  FLC,  RR,  RL,   0,    0,  FR,  FL } },
 159 { .ca_index = 0x1d,  .speakers = { FRC,  FLC,  RR,  RL,   0,  LFE,  FR,  FL } },
 160 { .ca_index = 0x1e,  .speakers = { FRC,  FLC,  RR,  RL,  FC,    0,  FR,  FL } },
 161 { .ca_index = 0x1f,  .speakers = { FRC,  FLC,  RR,  RL,  FC,  LFE,  FR,  FL } },
 162 { .ca_index = 0x20,  .speakers = {   0,  FCH,  RR,  RL,  FC,    0,  FR,  FL } },
 163 { .ca_index = 0x21,  .speakers = {   0,  FCH,  RR,  RL,  FC,  LFE,  FR,  FL } },
 164 { .ca_index = 0x22,  .speakers = {  TC,    0,  RR,  RL,  FC,    0,  FR,  FL } },
 165 { .ca_index = 0x23,  .speakers = {  TC,    0,  RR,  RL,  FC,  LFE,  FR,  FL } },
 166 { .ca_index = 0x24,  .speakers = { FRH,  FLH,  RR,  RL,   0,    0,  FR,  FL } },
 167 { .ca_index = 0x25,  .speakers = { FRH,  FLH,  RR,  RL,   0,  LFE,  FR,  FL } },
 168 { .ca_index = 0x26,  .speakers = { FRW,  FLW,  RR,  RL,   0,    0,  FR,  FL } },
 169 { .ca_index = 0x27,  .speakers = { FRW,  FLW,  RR,  RL,   0,  LFE,  FR,  FL } },
 170 { .ca_index = 0x28,  .speakers = {  TC,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
 171 { .ca_index = 0x29,  .speakers = {  TC,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
 172 { .ca_index = 0x2a,  .speakers = { FCH,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
 173 { .ca_index = 0x2b,  .speakers = { FCH,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
 174 { .ca_index = 0x2c,  .speakers = {  TC,  FCH,  RR,  RL,  FC,    0,  FR,  FL } },
 175 { .ca_index = 0x2d,  .speakers = {  TC,  FCH,  RR,  RL,  FC,  LFE,  FR,  FL } },
 176 { .ca_index = 0x2e,  .speakers = { FRH,  FLH,  RR,  RL,  FC,    0,  FR,  FL } },
 177 { .ca_index = 0x2f,  .speakers = { FRH,  FLH,  RR,  RL,  FC,  LFE,  FR,  FL } },
 178 { .ca_index = 0x30,  .speakers = { FRW,  FLW,  RR,  RL,  FC,    0,  FR,  FL } },
 179 { .ca_index = 0x31,  .speakers = { FRW,  FLW,  RR,  RL,  FC,  LFE,  FR,  FL } },
 180 };
 181 
 182 static int hdmi_pin_set_slot_channel(struct hdac_device *codec,
 183                 hda_nid_t pin_nid, int asp_slot, int channel)
 184 {
 185         return snd_hdac_codec_write(codec, pin_nid, 0,
 186                                 AC_VERB_SET_HDMI_CHAN_SLOT,
 187                                 (channel << 4) | asp_slot);
 188 }
 189 
 190 static int hdmi_pin_get_slot_channel(struct hdac_device *codec,
 191                         hda_nid_t pin_nid, int asp_slot)
 192 {
 193         return (snd_hdac_codec_read(codec, pin_nid, 0,
 194                                    AC_VERB_GET_HDMI_CHAN_SLOT,
 195                                    asp_slot) & 0xf0) >> 4;
 196 }
 197 
 198 static int hdmi_get_channel_count(struct hdac_device *codec, hda_nid_t cvt_nid)
 199 {
 200         return 1 + snd_hdac_codec_read(codec, cvt_nid, 0,
 201                                         AC_VERB_GET_CVT_CHAN_COUNT, 0);
 202 }
 203 
 204 static void hdmi_set_channel_count(struct hdac_device *codec,
 205                                    hda_nid_t cvt_nid, int chs)
 206 {
 207         if (chs != hdmi_get_channel_count(codec, cvt_nid))
 208                 snd_hdac_codec_write(codec, cvt_nid, 0,
 209                                     AC_VERB_SET_CVT_CHAN_COUNT, chs - 1);
 210 }
 211 
 212 /*
 213  * Channel mapping routines
 214  */
 215 
 216 /*
 217  * Compute derived values in channel_allocations[].
 218  */
 219 static void init_channel_allocations(void)
 220 {
 221         int i, j;
 222         struct hdac_cea_channel_speaker_allocation *p;
 223 
 224         for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
 225                 p = channel_allocations + i;
 226                 p->channels = 0;
 227                 p->spk_mask = 0;
 228                 for (j = 0; j < ARRAY_SIZE(p->speakers); j++)
 229                         if (p->speakers[j]) {
 230                                 p->channels++;
 231                                 p->spk_mask |= p->speakers[j];
 232                         }
 233         }
 234 }
 235 
 236 static int get_channel_allocation_order(int ca)
 237 {
 238         int i;
 239 
 240         for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
 241                 if (channel_allocations[i].ca_index == ca)
 242                         break;
 243         }
 244         return i;
 245 }
 246 
 247 void snd_hdac_print_channel_allocation(int spk_alloc, char *buf, int buflen)
 248 {
 249         int i, j;
 250 
 251         for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
 252                 if (spk_alloc & (1 << i))
 253                         j += scnprintf(buf + j, buflen - j,  " %s",
 254                                         cea_speaker_allocation_names[i]);
 255         }
 256         buf[j] = '\0';  /* necessary when j == 0 */
 257 }
 258 EXPORT_SYMBOL_GPL(snd_hdac_print_channel_allocation);
 259 
 260 /*
 261  * The transformation takes two steps:
 262  *
 263  *      eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask
 264  *            spk_mask => (channel_allocations[])         => ai->CA
 265  *
 266  * TODO: it could select the wrong CA from multiple candidates.
 267 */
 268 static int hdmi_channel_allocation_spk_alloc_blk(struct hdac_device *codec,
 269                                    int spk_alloc, int channels)
 270 {
 271         int i;
 272         int ca = 0;
 273         int spk_mask = 0;
 274         char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
 275 
 276         /*
 277          * CA defaults to 0 for basic stereo audio
 278          */
 279         if (channels <= 2)
 280                 return 0;
 281 
 282         /*
 283          * expand ELD's speaker allocation mask
 284          *
 285          * ELD tells the speaker mask in a compact(paired) form,
 286          * expand ELD's notions to match the ones used by Audio InfoFrame.
 287          */
 288         for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
 289                 if (spk_alloc & (1 << i))
 290                         spk_mask |= eld_speaker_allocation_bits[i];
 291         }
 292 
 293         /* search for the first working match in the CA table */
 294         for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
 295                 if (channels == channel_allocations[i].channels &&
 296                     (spk_mask & channel_allocations[i].spk_mask) ==
 297                                 channel_allocations[i].spk_mask) {
 298                         ca = channel_allocations[i].ca_index;
 299                         break;
 300                 }
 301         }
 302 
 303         if (!ca) {
 304                 /*
 305                  * if there was no match, select the regular ALSA channel
 306                  * allocation with the matching number of channels
 307                  */
 308                 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
 309                         if (channels == channel_allocations[i].channels) {
 310                                 ca = channel_allocations[i].ca_index;
 311                                 break;
 312                         }
 313                 }
 314         }
 315 
 316         snd_hdac_print_channel_allocation(spk_alloc, buf, sizeof(buf));
 317         dev_dbg(&codec->dev, "HDMI: select CA 0x%x for %d-channel allocation: %s\n",
 318                     ca, channels, buf);
 319 
 320         return ca;
 321 }
 322 
 323 static void hdmi_debug_channel_mapping(struct hdac_chmap *chmap,
 324                                        hda_nid_t pin_nid)
 325 {
 326 #ifdef CONFIG_SND_DEBUG_VERBOSE
 327         int i;
 328         int channel;
 329 
 330         for (i = 0; i < 8; i++) {
 331                 channel = chmap->ops.pin_get_slot_channel(
 332                                 chmap->hdac, pin_nid, i);
 333                 dev_dbg(&chmap->hdac->dev, "HDMI: ASP channel %d => slot %d\n",
 334                                                 channel, i);
 335         }
 336 #endif
 337 }
 338 
 339 static void hdmi_std_setup_channel_mapping(struct hdac_chmap *chmap,
 340                                        hda_nid_t pin_nid,
 341                                        bool non_pcm,
 342                                        int ca)
 343 {
 344         struct hdac_cea_channel_speaker_allocation *ch_alloc;
 345         int i;
 346         int err;
 347         int order;
 348         int non_pcm_mapping[8];
 349 
 350         order = get_channel_allocation_order(ca);
 351         ch_alloc = &channel_allocations[order];
 352 
 353         if (hdmi_channel_mapping[ca][1] == 0) {
 354                 int hdmi_slot = 0;
 355                 /* fill actual channel mappings in ALSA channel (i) order */
 356                 for (i = 0; i < ch_alloc->channels; i++) {
 357                         while (!WARN_ON(hdmi_slot >= 8) &&
 358                                !ch_alloc->speakers[7 - hdmi_slot])
 359                                 hdmi_slot++; /* skip zero slots */
 360 
 361                         hdmi_channel_mapping[ca][i] = (i << 4) | hdmi_slot++;
 362                 }
 363                 /* fill the rest of the slots with ALSA channel 0xf */
 364                 for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++)
 365                         if (!ch_alloc->speakers[7 - hdmi_slot])
 366                                 hdmi_channel_mapping[ca][i++] = (0xf << 4) | hdmi_slot;
 367         }
 368 
 369         if (non_pcm) {
 370                 for (i = 0; i < ch_alloc->channels; i++)
 371                         non_pcm_mapping[i] = (i << 4) | i;
 372                 for (; i < 8; i++)
 373                         non_pcm_mapping[i] = (0xf << 4) | i;
 374         }
 375 
 376         for (i = 0; i < 8; i++) {
 377                 int slotsetup = non_pcm ? non_pcm_mapping[i] : hdmi_channel_mapping[ca][i];
 378                 int hdmi_slot = slotsetup & 0x0f;
 379                 int channel = (slotsetup & 0xf0) >> 4;
 380 
 381                 err = chmap->ops.pin_set_slot_channel(chmap->hdac,
 382                                 pin_nid, hdmi_slot, channel);
 383                 if (err) {
 384                         dev_dbg(&chmap->hdac->dev, "HDMI: channel mapping failed\n");
 385                         break;
 386                 }
 387         }
 388 }
 389 
 390 struct channel_map_table {
 391         unsigned char map;              /* ALSA API channel map position */
 392         int spk_mask;                   /* speaker position bit mask */
 393 };
 394 
 395 static struct channel_map_table map_tables[] = {
 396         { SNDRV_CHMAP_FL,       FL },
 397         { SNDRV_CHMAP_FR,       FR },
 398         { SNDRV_CHMAP_RL,       RL },
 399         { SNDRV_CHMAP_RR,       RR },
 400         { SNDRV_CHMAP_LFE,      LFE },
 401         { SNDRV_CHMAP_FC,       FC },
 402         { SNDRV_CHMAP_RLC,      RLC },
 403         { SNDRV_CHMAP_RRC,      RRC },
 404         { SNDRV_CHMAP_RC,       RC },
 405         { SNDRV_CHMAP_FLC,      FLC },
 406         { SNDRV_CHMAP_FRC,      FRC },
 407         { SNDRV_CHMAP_TFL,      FLH },
 408         { SNDRV_CHMAP_TFR,      FRH },
 409         { SNDRV_CHMAP_FLW,      FLW },
 410         { SNDRV_CHMAP_FRW,      FRW },
 411         { SNDRV_CHMAP_TC,       TC },
 412         { SNDRV_CHMAP_TFC,      FCH },
 413         {} /* terminator */
 414 };
 415 
 416 /* from ALSA API channel position to speaker bit mask */
 417 int snd_hdac_chmap_to_spk_mask(unsigned char c)
 418 {
 419         struct channel_map_table *t = map_tables;
 420 
 421         for (; t->map; t++) {
 422                 if (t->map == c)
 423                         return t->spk_mask;
 424         }
 425         return 0;
 426 }
 427 EXPORT_SYMBOL_GPL(snd_hdac_chmap_to_spk_mask);
 428 
 429 /* from ALSA API channel position to CEA slot */
 430 static int to_cea_slot(int ordered_ca, unsigned char pos)
 431 {
 432         int mask = snd_hdac_chmap_to_spk_mask(pos);
 433         int i;
 434 
 435         /* Add sanity check to pass klockwork check.
 436          * This should never happen.
 437          */
 438         if (ordered_ca >= ARRAY_SIZE(channel_allocations))
 439                 return -1;
 440 
 441         if (mask) {
 442                 for (i = 0; i < 8; i++) {
 443                         if (channel_allocations[ordered_ca].speakers[7 - i] == mask)
 444                                 return i;
 445                 }
 446         }
 447 
 448         return -1;
 449 }
 450 
 451 /* from speaker bit mask to ALSA API channel position */
 452 int snd_hdac_spk_to_chmap(int spk)
 453 {
 454         struct channel_map_table *t = map_tables;
 455 
 456         for (; t->map; t++) {
 457                 if (t->spk_mask == spk)
 458                         return t->map;
 459         }
 460         return 0;
 461 }
 462 EXPORT_SYMBOL_GPL(snd_hdac_spk_to_chmap);
 463 
 464 /* from CEA slot to ALSA API channel position */
 465 static int from_cea_slot(int ordered_ca, unsigned char slot)
 466 {
 467         int mask;
 468 
 469         /* Add sanity check to pass klockwork check.
 470          * This should never happen.
 471          */
 472         if (slot >= 8)
 473                 return 0;
 474 
 475         mask = channel_allocations[ordered_ca].speakers[7 - slot];
 476 
 477         return snd_hdac_spk_to_chmap(mask);
 478 }
 479 
 480 /* get the CA index corresponding to the given ALSA API channel map */
 481 static int hdmi_manual_channel_allocation(int chs, unsigned char *map)
 482 {
 483         int i, spks = 0, spk_mask = 0;
 484 
 485         for (i = 0; i < chs; i++) {
 486                 int mask = snd_hdac_chmap_to_spk_mask(map[i]);
 487 
 488                 if (mask) {
 489                         spk_mask |= mask;
 490                         spks++;
 491                 }
 492         }
 493 
 494         for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
 495                 if ((chs == channel_allocations[i].channels ||
 496                      spks == channel_allocations[i].channels) &&
 497                     (spk_mask & channel_allocations[i].spk_mask) ==
 498                                 channel_allocations[i].spk_mask)
 499                         return channel_allocations[i].ca_index;
 500         }
 501         return -1;
 502 }
 503 
 504 /* set up the channel slots for the given ALSA API channel map */
 505 static int hdmi_manual_setup_channel_mapping(struct hdac_chmap *chmap,
 506                                              hda_nid_t pin_nid,
 507                                              int chs, unsigned char *map,
 508                                              int ca)
 509 {
 510         int ordered_ca = get_channel_allocation_order(ca);
 511         int alsa_pos, hdmi_slot;
 512         int assignments[8] = {[0 ... 7] = 0xf};
 513 
 514         for (alsa_pos = 0; alsa_pos < chs; alsa_pos++) {
 515 
 516                 hdmi_slot = to_cea_slot(ordered_ca, map[alsa_pos]);
 517 
 518                 if (hdmi_slot < 0)
 519                         continue; /* unassigned channel */
 520 
 521                 assignments[hdmi_slot] = alsa_pos;
 522         }
 523 
 524         for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) {
 525                 int err;
 526 
 527                 err = chmap->ops.pin_set_slot_channel(chmap->hdac,
 528                                 pin_nid, hdmi_slot, assignments[hdmi_slot]);
 529                 if (err)
 530                         return -EINVAL;
 531         }
 532         return 0;
 533 }
 534 
 535 /* store ALSA API channel map from the current default map */
 536 static void hdmi_setup_fake_chmap(unsigned char *map, int ca)
 537 {
 538         int i;
 539         int ordered_ca = get_channel_allocation_order(ca);
 540 
 541         for (i = 0; i < 8; i++) {
 542                 if (ordered_ca < ARRAY_SIZE(channel_allocations) &&
 543                     i < channel_allocations[ordered_ca].channels)
 544                         map[i] = from_cea_slot(ordered_ca, hdmi_channel_mapping[ca][i] & 0x0f);
 545                 else
 546                         map[i] = 0;
 547         }
 548 }
 549 
 550 void snd_hdac_setup_channel_mapping(struct hdac_chmap *chmap,
 551                                        hda_nid_t pin_nid, bool non_pcm, int ca,
 552                                        int channels, unsigned char *map,
 553                                        bool chmap_set)
 554 {
 555         if (!non_pcm && chmap_set) {
 556                 hdmi_manual_setup_channel_mapping(chmap, pin_nid,
 557                                                   channels, map, ca);
 558         } else {
 559                 hdmi_std_setup_channel_mapping(chmap, pin_nid, non_pcm, ca);
 560                 hdmi_setup_fake_chmap(map, ca);
 561         }
 562 
 563         hdmi_debug_channel_mapping(chmap, pin_nid);
 564 }
 565 EXPORT_SYMBOL_GPL(snd_hdac_setup_channel_mapping);
 566 
 567 int snd_hdac_get_active_channels(int ca)
 568 {
 569         int ordered_ca = get_channel_allocation_order(ca);
 570 
 571         /* Add sanity check to pass klockwork check.
 572          * This should never happen.
 573          */
 574         if (ordered_ca >= ARRAY_SIZE(channel_allocations))
 575                 ordered_ca = 0;
 576 
 577         return channel_allocations[ordered_ca].channels;
 578 }
 579 EXPORT_SYMBOL_GPL(snd_hdac_get_active_channels);
 580 
 581 struct hdac_cea_channel_speaker_allocation *snd_hdac_get_ch_alloc_from_ca(int ca)
 582 {
 583         return &channel_allocations[get_channel_allocation_order(ca)];
 584 }
 585 EXPORT_SYMBOL_GPL(snd_hdac_get_ch_alloc_from_ca);
 586 
 587 int snd_hdac_channel_allocation(struct hdac_device *hdac, int spk_alloc,
 588                 int channels, bool chmap_set, bool non_pcm, unsigned char *map)
 589 {
 590         int ca;
 591 
 592         if (!non_pcm && chmap_set)
 593                 ca = hdmi_manual_channel_allocation(channels, map);
 594         else
 595                 ca = hdmi_channel_allocation_spk_alloc_blk(hdac,
 596                                         spk_alloc, channels);
 597 
 598         if (ca < 0)
 599                 ca = 0;
 600 
 601         return ca;
 602 }
 603 EXPORT_SYMBOL_GPL(snd_hdac_channel_allocation);
 604 
 605 /*
 606  * ALSA API channel-map control callbacks
 607  */
 608 static int hdmi_chmap_ctl_info(struct snd_kcontrol *kcontrol,
 609                                struct snd_ctl_elem_info *uinfo)
 610 {
 611         struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
 612         struct hdac_chmap *chmap = info->private_data;
 613 
 614         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 615         uinfo->count = chmap->channels_max;
 616         uinfo->value.integer.min = 0;
 617         uinfo->value.integer.max = SNDRV_CHMAP_LAST;
 618         return 0;
 619 }
 620 
 621 static int hdmi_chmap_cea_alloc_validate_get_type(struct hdac_chmap *chmap,
 622                 struct hdac_cea_channel_speaker_allocation *cap, int channels)
 623 {
 624         /* If the speaker allocation matches the channel count, it is OK.*/
 625         if (cap->channels != channels)
 626                 return -1;
 627 
 628         /* all channels are remappable freely */
 629         return SNDRV_CTL_TLVT_CHMAP_VAR;
 630 }
 631 
 632 static void hdmi_cea_alloc_to_tlv_chmap(struct hdac_chmap *hchmap,
 633                 struct hdac_cea_channel_speaker_allocation *cap,
 634                 unsigned int *chmap, int channels)
 635 {
 636         int count = 0;
 637         int c;
 638 
 639         for (c = 7; c >= 0; c--) {
 640                 int spk = cap->speakers[c];
 641 
 642                 if (!spk)
 643                         continue;
 644 
 645                 chmap[count++] = snd_hdac_spk_to_chmap(spk);
 646         }
 647 
 648         WARN_ON(count != channels);
 649 }
 650 
 651 static int spk_mask_from_spk_alloc(int spk_alloc)
 652 {
 653         int i;
 654         int spk_mask = eld_speaker_allocation_bits[0];
 655 
 656         for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
 657                 if (spk_alloc & (1 << i))
 658                         spk_mask |= eld_speaker_allocation_bits[i];
 659         }
 660 
 661         return spk_mask;
 662 }
 663 
 664 static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
 665                               unsigned int size, unsigned int __user *tlv)
 666 {
 667         struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
 668         struct hdac_chmap *chmap = info->private_data;
 669         int pcm_idx = kcontrol->private_value;
 670         unsigned int __user *dst;
 671         int chs, count = 0;
 672         unsigned long max_chs;
 673         int type;
 674         int spk_alloc, spk_mask;
 675 
 676         if (size < 8)
 677                 return -ENOMEM;
 678         if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
 679                 return -EFAULT;
 680         size -= 8;
 681         dst = tlv + 2;
 682 
 683         spk_alloc = chmap->ops.get_spk_alloc(chmap->hdac, pcm_idx);
 684         spk_mask = spk_mask_from_spk_alloc(spk_alloc);
 685 
 686         max_chs = hweight_long(spk_mask);
 687 
 688         for (chs = 2; chs <= max_chs; chs++) {
 689                 int i;
 690                 struct hdac_cea_channel_speaker_allocation *cap;
 691 
 692                 cap = channel_allocations;
 693                 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++, cap++) {
 694                         int chs_bytes = chs * 4;
 695                         unsigned int tlv_chmap[8];
 696 
 697                         if (cap->channels != chs)
 698                                 continue;
 699 
 700                         if (!(cap->spk_mask == (spk_mask & cap->spk_mask)))
 701                                 continue;
 702 
 703                         type = chmap->ops.chmap_cea_alloc_validate_get_type(
 704                                                         chmap, cap, chs);
 705                         if (type < 0)
 706                                 return -ENODEV;
 707                         if (size < 8)
 708                                 return -ENOMEM;
 709 
 710                         if (put_user(type, dst) ||
 711                             put_user(chs_bytes, dst + 1))
 712                                 return -EFAULT;
 713 
 714                         dst += 2;
 715                         size -= 8;
 716                         count += 8;
 717 
 718                         if (size < chs_bytes)
 719                                 return -ENOMEM;
 720 
 721                         size -= chs_bytes;
 722                         count += chs_bytes;
 723                         chmap->ops.cea_alloc_to_tlv_chmap(chmap, cap,
 724                                                 tlv_chmap, chs);
 725 
 726                         if (copy_to_user(dst, tlv_chmap, chs_bytes))
 727                                 return -EFAULT;
 728                         dst += chs;
 729                 }
 730         }
 731 
 732         if (put_user(count, tlv + 1))
 733                 return -EFAULT;
 734 
 735         return 0;
 736 }
 737 
 738 static int hdmi_chmap_ctl_get(struct snd_kcontrol *kcontrol,
 739                               struct snd_ctl_elem_value *ucontrol)
 740 {
 741         struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
 742         struct hdac_chmap *chmap = info->private_data;
 743         int pcm_idx = kcontrol->private_value;
 744         unsigned char pcm_chmap[8];
 745         int i;
 746 
 747         memset(pcm_chmap, 0, sizeof(pcm_chmap));
 748         chmap->ops.get_chmap(chmap->hdac, pcm_idx, pcm_chmap);
 749 
 750         for (i = 0; i < ARRAY_SIZE(pcm_chmap); i++)
 751                 ucontrol->value.integer.value[i] = pcm_chmap[i];
 752 
 753         return 0;
 754 }
 755 
 756 static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol,
 757                               struct snd_ctl_elem_value *ucontrol)
 758 {
 759         struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
 760         struct hdac_chmap *hchmap = info->private_data;
 761         int pcm_idx = kcontrol->private_value;
 762         unsigned int ctl_idx;
 763         struct snd_pcm_substream *substream;
 764         unsigned char chmap[8], per_pin_chmap[8];
 765         int i, err, ca, prepared = 0;
 766 
 767         /* No monitor is connected in dyn_pcm_assign.
 768          * It's invalid to setup the chmap
 769          */
 770         if (!hchmap->ops.is_pcm_attached(hchmap->hdac, pcm_idx))
 771                 return 0;
 772 
 773         ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
 774         substream = snd_pcm_chmap_substream(info, ctl_idx);
 775         if (!substream || !substream->runtime)
 776                 return 0; /* just for avoiding error from alsactl restore */
 777         switch (substream->runtime->status->state) {
 778         case SNDRV_PCM_STATE_OPEN:
 779         case SNDRV_PCM_STATE_SETUP:
 780                 break;
 781         case SNDRV_PCM_STATE_PREPARED:
 782                 prepared = 1;
 783                 break;
 784         default:
 785                 return -EBUSY;
 786         }
 787         memset(chmap, 0, sizeof(chmap));
 788         for (i = 0; i < ARRAY_SIZE(chmap); i++)
 789                 chmap[i] = ucontrol->value.integer.value[i];
 790 
 791         hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, per_pin_chmap);
 792         if (!memcmp(chmap, per_pin_chmap, sizeof(chmap)))
 793                 return 0;
 794         ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap);
 795         if (ca < 0)
 796                 return -EINVAL;
 797         if (hchmap->ops.chmap_validate) {
 798                 err = hchmap->ops.chmap_validate(hchmap, ca,
 799                                 ARRAY_SIZE(chmap), chmap);
 800                 if (err)
 801                         return err;
 802         }
 803 
 804         hchmap->ops.set_chmap(hchmap->hdac, pcm_idx, chmap, prepared);
 805 
 806         return 0;
 807 }
 808 
 809 static const struct hdac_chmap_ops chmap_ops = {
 810         .chmap_cea_alloc_validate_get_type      = hdmi_chmap_cea_alloc_validate_get_type,
 811         .cea_alloc_to_tlv_chmap                 = hdmi_cea_alloc_to_tlv_chmap,
 812         .pin_get_slot_channel                   = hdmi_pin_get_slot_channel,
 813         .pin_set_slot_channel                   = hdmi_pin_set_slot_channel,
 814         .set_channel_count                      = hdmi_set_channel_count,
 815 };
 816 
 817 void snd_hdac_register_chmap_ops(struct hdac_device *hdac,
 818                                 struct hdac_chmap *chmap)
 819 {
 820         chmap->ops = chmap_ops;
 821         chmap->hdac = hdac;
 822         init_channel_allocations();
 823 }
 824 EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops);
 825 
 826 int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
 827                                 struct hdac_chmap *hchmap)
 828 {
 829         struct snd_pcm_chmap *chmap;
 830         struct snd_kcontrol *kctl;
 831         int err, i;
 832 
 833         err = snd_pcm_add_chmap_ctls(pcm,
 834                                      SNDRV_PCM_STREAM_PLAYBACK,
 835                                      NULL, 0, pcm_idx, &chmap);
 836         if (err < 0)
 837                 return err;
 838         /* override handlers */
 839         chmap->private_data = hchmap;
 840         kctl = chmap->kctl;
 841         for (i = 0; i < kctl->count; i++)
 842                 kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE;
 843         kctl->info = hdmi_chmap_ctl_info;
 844         kctl->get = hdmi_chmap_ctl_get;
 845         kctl->put = hdmi_chmap_ctl_put;
 846         kctl->tlv.c = hdmi_chmap_ctl_tlv;
 847 
 848         return 0;
 849 }
 850 EXPORT_SYMBOL_GPL(snd_hdac_add_chmap_ctls);
/* [<][>][^][v][top][bottom][index][help] */
root/sound/hda/hdmi_chmap.c

DEFINITIONS
