drivers/gpu/drm/radeon/radeon_audio.c

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Slava Grigorev <slava.grigorev@amd.com>
  23  */
  24
  25 #include <linux/gcd.h>
  26 #include <drm/drmP.h>
  27 #include <drm/drm_crtc.h>
  28 #include "radeon.h"
  29 #include "atom.h"
  30 #include "radeon_audio.h"
  31
  32 void r600_audio_enable(struct radeon_device *rdev, struct r600_audio_pin *pin,
  33                 u8 enable_mask);
  34 void dce4_audio_enable(struct radeon_device *rdev, struct r600_audio_pin *pin,
  35                 u8 enable_mask);
  36 void dce6_audio_enable(struct radeon_device *rdev, struct r600_audio_pin *pin,
  37                 u8 enable_mask);
  38 u32 dce6_endpoint_rreg(struct radeon_device *rdev, u32 offset, u32 reg);
  39 void dce6_endpoint_wreg(struct radeon_device *rdev,
  40                 u32 offset, u32 reg, u32 v);
  41 void dce3_2_afmt_write_sad_regs(struct drm_encoder *encoder,
  42                 struct cea_sad *sads, int sad_count);
  43 void evergreen_hdmi_write_sad_regs(struct drm_encoder *encoder,
  44                 struct cea_sad *sads, int sad_count);
  45 void dce6_afmt_write_sad_regs(struct drm_encoder *encoder,
  46                 struct cea_sad *sads, int sad_count);
  47 void dce3_2_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
  48                 u8 *sadb, int sad_count);
  49 void dce3_2_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
  50                 u8 *sadb, int sad_count);
  51 void dce4_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
  52                 u8 *sadb, int sad_count);
  53 void dce4_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
  54                 u8 *sadb, int sad_count);
  55 void dce6_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
  56                 u8 *sadb, int sad_count);
  57 void dce6_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
  58                 u8 *sadb, int sad_count);
  59 void dce4_afmt_write_latency_fields(struct drm_encoder *encoder,
  60                 struct drm_connector *connector, struct drm_display_mode *mode);
  61 void dce6_afmt_write_latency_fields(struct drm_encoder *encoder,
  62                 struct drm_connector *connector, struct drm_display_mode *mode);
  63 struct r600_audio_pin* r600_audio_get_pin(struct radeon_device *rdev);
  64 struct r600_audio_pin* dce6_audio_get_pin(struct radeon_device *rdev);
  65 void dce6_afmt_select_pin(struct drm_encoder *encoder);
  66 void r600_hdmi_audio_set_dto(struct radeon_device *rdev,
  67         struct radeon_crtc *crtc, unsigned int clock);
  68 void dce3_2_audio_set_dto(struct radeon_device *rdev,
  69         struct radeon_crtc *crtc, unsigned int clock);
  70 void dce4_hdmi_audio_set_dto(struct radeon_device *rdev,
  71         struct radeon_crtc *crtc, unsigned int clock);
  72 void dce4_dp_audio_set_dto(struct radeon_device *rdev,
  73         struct radeon_crtc *crtc, unsigned int clock);
  74 void dce6_hdmi_audio_set_dto(struct radeon_device *rdev,
  75         struct radeon_crtc *crtc, unsigned int clock);
  76 void dce6_dp_audio_set_dto(struct radeon_device *rdev,
  77         struct radeon_crtc *crtc, unsigned int clock);
  78 void r600_set_avi_packet(struct radeon_device *rdev, u32 offset,
  79         unsigned char *buffer, size_t size);
  80 void evergreen_set_avi_packet(struct radeon_device *rdev, u32 offset,
  81         unsigned char *buffer, size_t size);
  82 void r600_hdmi_update_acr(struct drm_encoder *encoder, long offset,
  83         const struct radeon_hdmi_acr *acr);
  84 void dce3_2_hdmi_update_acr(struct drm_encoder *encoder, long offset,
  85         const struct radeon_hdmi_acr *acr);
  86 void evergreen_hdmi_update_acr(struct drm_encoder *encoder, long offset,
  87         const struct radeon_hdmi_acr *acr);
  88 void r600_set_vbi_packet(struct drm_encoder *encoder, u32 offset);
  89 void dce4_set_vbi_packet(struct drm_encoder *encoder, u32 offset);
  90 void dce4_hdmi_set_color_depth(struct drm_encoder *encoder,
  91         u32 offset, int bpc);
  92
  93 static const u32 pin_offsets[7] =
  94 {
  95         (0x5e00 - 0x5e00),
  96         (0x5e18 - 0x5e00),
  97         (0x5e30 - 0x5e00),
  98         (0x5e48 - 0x5e00),
  99         (0x5e60 - 0x5e00),
 100         (0x5e78 - 0x5e00),
 101         (0x5e90 - 0x5e00),
 102 };
 103
 104 static u32 radeon_audio_rreg(struct radeon_device *rdev, u32 offset, u32 reg)
 105 {
 106         return RREG32(reg);
 107 }
 108
 109 static void radeon_audio_wreg(struct radeon_device *rdev, u32 offset,
 110                 u32 reg, u32 v)
 111 {
 112         WREG32(reg, v);
 113 }
 114
 115 static struct radeon_audio_basic_funcs r600_funcs = {
 116         .endpoint_rreg = radeon_audio_rreg,
 117         .endpoint_wreg = radeon_audio_wreg,
 118         .enable = r600_audio_enable,
 119 };
 120
 121 static struct radeon_audio_basic_funcs dce32_funcs = {
 122         .endpoint_rreg = radeon_audio_rreg,
 123         .endpoint_wreg = radeon_audio_wreg,
 124         .enable = r600_audio_enable,
 125 };
 126
 127 static struct radeon_audio_basic_funcs dce4_funcs = {
 128         .endpoint_rreg = radeon_audio_rreg,
 129         .endpoint_wreg = radeon_audio_wreg,
 130         .enable = dce4_audio_enable,
 131 };
 132
 133 static struct radeon_audio_basic_funcs dce6_funcs = {
 134         .endpoint_rreg = dce6_endpoint_rreg,
 135         .endpoint_wreg = dce6_endpoint_wreg,
 136         .enable = dce6_audio_enable,
 137 };
 138
 139 static struct radeon_audio_funcs r600_hdmi_funcs = {
 140         .get_pin = r600_audio_get_pin,
 141         .set_dto = r600_hdmi_audio_set_dto,
 142         .update_acr = r600_hdmi_update_acr,
 143         .set_vbi_packet = r600_set_vbi_packet,
 144         .set_avi_packet = r600_set_avi_packet,
 145 };
 146
 147 static struct radeon_audio_funcs dce32_hdmi_funcs = {
 148         .get_pin = r600_audio_get_pin,
 149         .write_sad_regs = dce3_2_afmt_write_sad_regs,
 150         .write_speaker_allocation = dce3_2_afmt_hdmi_write_speaker_allocation,
 151         .set_dto = dce3_2_audio_set_dto,
 152         .update_acr = dce3_2_hdmi_update_acr,
 153         .set_vbi_packet = r600_set_vbi_packet,
 154         .set_avi_packet = r600_set_avi_packet,
 155 };
 156
 157 static struct radeon_audio_funcs dce32_dp_funcs = {
 158         .get_pin = r600_audio_get_pin,
 159         .write_sad_regs = dce3_2_afmt_write_sad_regs,
 160         .write_speaker_allocation = dce3_2_afmt_dp_write_speaker_allocation,
 161         .set_dto = dce3_2_audio_set_dto,
 162         .set_avi_packet = r600_set_avi_packet,
 163 };
 164
 165 static struct radeon_audio_funcs dce4_hdmi_funcs = {
 166         .get_pin = r600_audio_get_pin,
 167         .write_sad_regs = evergreen_hdmi_write_sad_regs,
 168         .write_speaker_allocation = dce4_afmt_hdmi_write_speaker_allocation,
 169         .write_latency_fields = dce4_afmt_write_latency_fields,
 170         .set_dto = dce4_hdmi_audio_set_dto,
 171         .update_acr = evergreen_hdmi_update_acr,
 172         .set_vbi_packet = dce4_set_vbi_packet,
 173         .set_color_depth = dce4_hdmi_set_color_depth,
 174         .set_avi_packet = evergreen_set_avi_packet,
 175 };
 176
 177 static struct radeon_audio_funcs dce4_dp_funcs = {
 178         .get_pin = r600_audio_get_pin,
 179         .write_sad_regs = evergreen_hdmi_write_sad_regs,
 180         .write_speaker_allocation = dce4_afmt_dp_write_speaker_allocation,
 181         .write_latency_fields = dce4_afmt_write_latency_fields,
 182         .set_dto = dce4_dp_audio_set_dto,
 183         .set_avi_packet = evergreen_set_avi_packet,
 184 };
 185
 186 static struct radeon_audio_funcs dce6_hdmi_funcs = {
 187         .select_pin = dce6_afmt_select_pin,
 188         .get_pin = dce6_audio_get_pin,
 189         .write_sad_regs = dce6_afmt_write_sad_regs,
 190         .write_speaker_allocation = dce6_afmt_hdmi_write_speaker_allocation,
 191         .write_latency_fields = dce6_afmt_write_latency_fields,
 192         .set_dto = dce6_hdmi_audio_set_dto,
 193         .update_acr = evergreen_hdmi_update_acr,
 194         .set_vbi_packet = dce4_set_vbi_packet,
 195         .set_color_depth = dce4_hdmi_set_color_depth,
 196         .set_avi_packet = evergreen_set_avi_packet,
 197 };
 198
 199 static struct radeon_audio_funcs dce6_dp_funcs = {
 200         .select_pin = dce6_afmt_select_pin,
 201         .get_pin = dce6_audio_get_pin,
 202         .write_sad_regs = dce6_afmt_write_sad_regs,
 203         .write_speaker_allocation = dce6_afmt_dp_write_speaker_allocation,
 204         .write_latency_fields = dce6_afmt_write_latency_fields,
 205         .set_dto = dce6_dp_audio_set_dto,
 206         .set_avi_packet = evergreen_set_avi_packet,
 207 };
 208
 209 static void radeon_audio_interface_init(struct radeon_device *rdev)
 210 {
 211         if (ASIC_IS_DCE6(rdev)) {
 212                 rdev->audio.funcs = &dce6_funcs;
 213                 rdev->audio.hdmi_funcs = &dce6_hdmi_funcs;
 214                 rdev->audio.dp_funcs = &dce6_dp_funcs;
 215         } else if (ASIC_IS_DCE4(rdev)) {
 216                 rdev->audio.funcs = &dce4_funcs;
 217                 rdev->audio.hdmi_funcs = &dce4_hdmi_funcs;
 218                 rdev->audio.dp_funcs = &dce4_dp_funcs;
 219         } else if (ASIC_IS_DCE32(rdev)) {
 220                 rdev->audio.funcs = &dce32_funcs;
 221                 rdev->audio.hdmi_funcs = &dce32_hdmi_funcs;
 222                 rdev->audio.dp_funcs = &dce32_dp_funcs;
 223         } else {
 224                 rdev->audio.funcs = &r600_funcs;
 225                 rdev->audio.hdmi_funcs = &r600_hdmi_funcs;
 226                 rdev->audio.dp_funcs = 0;
 227         }
 228 }
 229
 230 static int radeon_audio_chipset_supported(struct radeon_device *rdev)
 231 {
 232         return ASIC_IS_DCE2(rdev) && !ASIC_IS_NODCE(rdev);
 233 }
 234
 235 int radeon_audio_init(struct radeon_device *rdev)
 236 {
 237         int i;
 238
 239         if (!radeon_audio || !radeon_audio_chipset_supported(rdev))
 240                 return 0;
 241
 242         rdev->audio.enabled = true;
 243
 244         if (ASIC_IS_DCE83(rdev))                /* KB: 2 streams, 3 endpoints */
 245                 rdev->audio.num_pins = 3;
 246         else if (ASIC_IS_DCE81(rdev))   /* KV: 4 streams, 7 endpoints */
 247                 rdev->audio.num_pins = 7;
 248         else if (ASIC_IS_DCE8(rdev))    /* BN/HW: 6 streams, 7 endpoints */
 249                 rdev->audio.num_pins = 7;
 250         else if (ASIC_IS_DCE64(rdev))   /* OL: 2 streams, 2 endpoints */
 251                 rdev->audio.num_pins = 2;
 252         else if (ASIC_IS_DCE61(rdev))   /* TN: 4 streams, 6 endpoints */
 253                 rdev->audio.num_pins = 6;
 254         else if (ASIC_IS_DCE6(rdev))    /* SI: 6 streams, 6 endpoints */
 255                 rdev->audio.num_pins = 6;
 256         else
 257                 rdev->audio.num_pins = 1;
 258
 259         for (i = 0; i < rdev->audio.num_pins; i++) {
 260                 rdev->audio.pin[i].channels = -1;
 261                 rdev->audio.pin[i].rate = -1;
 262                 rdev->audio.pin[i].bits_per_sample = -1;
 263                 rdev->audio.pin[i].status_bits = 0;
 264                 rdev->audio.pin[i].category_code = 0;
 265                 rdev->audio.pin[i].connected = false;
 266                 rdev->audio.pin[i].offset = pin_offsets[i];
 267                 rdev->audio.pin[i].id = i;
 268         }
 269
 270         radeon_audio_interface_init(rdev);
 271
 272         /* disable audio.  it will be set up later */
 273         for (i = 0; i < rdev->audio.num_pins; i++)
 274                 radeon_audio_enable(rdev, &rdev->audio.pin[i], false);
 275
 276         return 0;
 277 }
 278
 279 void radeon_audio_detect(struct drm_connector *connector,
 280         enum drm_connector_status status)
 281 {
 282         if (!connector || !connector->encoder)
 283                 return;
 284
 285         if (status == connector_status_connected) {
 286                 int sink_type;
 287                 struct radeon_device *rdev = connector->encoder->dev->dev_private;
 288                 struct radeon_connector *radeon_connector;
 289                 struct radeon_encoder *radeon_encoder =
 290                         to_radeon_encoder(connector->encoder);
 291
 292                 if (!drm_detect_monitor_audio(radeon_connector_edid(connector))) {
 293                         radeon_encoder->audio = 0;
 294                         return;
 295                 }
 296
 297                 radeon_connector = to_radeon_connector(connector);
 298                 sink_type = radeon_dp_getsinktype(radeon_connector);
 299
 300                 if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort &&
 301                         sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT)
 302                         radeon_encoder->audio = rdev->audio.dp_funcs;
 303                 else
 304                         radeon_encoder->audio = rdev->audio.hdmi_funcs;
 305                 /* TODO: set up the sads, etc. and set the audio enable_mask */
 306         } else {
 307                 /* TODO: reset the audio enable_mask */
 308         }
 309 }
 310
 311 u32 radeon_audio_endpoint_rreg(struct radeon_device *rdev, u32 offset, u32 reg)
 312 {
 313         if (rdev->audio.funcs->endpoint_rreg)
 314                 return rdev->audio.funcs->endpoint_rreg(rdev, offset, reg);
 315
 316         return 0;
 317 }
 318
 319 void radeon_audio_endpoint_wreg(struct radeon_device *rdev, u32 offset,
 320         u32 reg, u32 v)
 321 {
 322         if (rdev->audio.funcs->endpoint_wreg)
 323                 rdev->audio.funcs->endpoint_wreg(rdev, offset, reg, v);
 324 }
 325
 326 void radeon_audio_write_sad_regs(struct drm_encoder *encoder)
 327 {
 328         struct radeon_encoder *radeon_encoder;
 329         struct drm_connector *connector;
 330         struct radeon_connector *radeon_connector = NULL;
 331         struct cea_sad *sads;
 332         int sad_count;
 333
 334         list_for_each_entry(connector,
 335                 &encoder->dev->mode_config.connector_list, head) {
 336                 if (connector->encoder == encoder) {
 337                         radeon_connector = to_radeon_connector(connector);
 338                         break;
 339                 }
 340         }
 341
 342         if (!radeon_connector) {
 343                 DRM_ERROR("Couldn't find encoder's connector\n");
 344                 return;
 345         }
 346
 347         sad_count = drm_edid_to_sad(radeon_connector_edid(connector), &sads);
 348         if (sad_count <= 0) {
 349                 DRM_ERROR("Couldn't read SADs: %d\n", sad_count);
 350                 return;
 351         }
 352         BUG_ON(!sads);
 353
 354         radeon_encoder = to_radeon_encoder(encoder);
 355
 356         if (radeon_encoder->audio && radeon_encoder->audio->write_sad_regs)
 357                 radeon_encoder->audio->write_sad_regs(encoder, sads, sad_count);
 358
 359         kfree(sads);
 360 }
 361
 362 void radeon_audio_write_speaker_allocation(struct drm_encoder *encoder)
 363 {
 364         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 365     struct drm_connector *connector;
 366     struct radeon_connector *radeon_connector = NULL;
 367     u8 *sadb = NULL;
 368     int sad_count;
 369
 370     list_for_each_entry(connector,
 371                 &encoder->dev->mode_config.connector_list, head) {
 372         if (connector->encoder == encoder) {
 373             radeon_connector = to_radeon_connector(connector);
 374             break;
 375         }
 376     }
 377
 378     if (!radeon_connector) {
 379         DRM_ERROR("Couldn't find encoder's connector\n");
 380         return;
 381     }
 382
 383     sad_count = drm_edid_to_speaker_allocation(
 384                 radeon_connector_edid(connector), &sadb);
 385     if (sad_count < 0) {
 386         DRM_DEBUG("Couldn't read Speaker Allocation Data Block: %d\n",
 387                         sad_count);
 388         sad_count = 0;
 389     }
 390
 391         if (radeon_encoder->audio && radeon_encoder->audio->write_speaker_allocation)
 392                 radeon_encoder->audio->write_speaker_allocation(encoder, sadb, sad_count);
 393
 394     kfree(sadb);
 395 }
 396
 397 void radeon_audio_write_latency_fields(struct drm_encoder *encoder,
 398         struct drm_display_mode *mode)
 399 {
 400         struct radeon_encoder *radeon_encoder;
 401         struct drm_connector *connector;
 402         struct radeon_connector *radeon_connector = 0;
 403
 404         list_for_each_entry(connector,
 405                 &encoder->dev->mode_config.connector_list, head) {
 406                 if (connector->encoder == encoder) {
 407                         radeon_connector = to_radeon_connector(connector);
 408                         break;
 409                 }
 410         }
 411
 412         if (!radeon_connector) {
 413                 DRM_ERROR("Couldn't find encoder's connector\n");
 414                 return;
 415         }
 416
 417         radeon_encoder = to_radeon_encoder(encoder);
 418
 419         if (radeon_encoder->audio && radeon_encoder->audio->write_latency_fields)
 420                 radeon_encoder->audio->write_latency_fields(encoder, connector, mode);
 421 }
 422
 423 struct r600_audio_pin* radeon_audio_get_pin(struct drm_encoder *encoder)
 424 {
 425         struct radeon_device *rdev = encoder->dev->dev_private;
 426         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 427
 428         if (radeon_encoder->audio && radeon_encoder->audio->get_pin)
 429                 return radeon_encoder->audio->get_pin(rdev);
 430
 431         return NULL;
 432 }
 433
 434 void radeon_audio_select_pin(struct drm_encoder *encoder)
 435 {
 436         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 437
 438         if (radeon_encoder->audio && radeon_encoder->audio->select_pin)
 439                 radeon_encoder->audio->select_pin(encoder);
 440 }
 441
 442 void radeon_audio_enable(struct radeon_device *rdev,
 443         struct r600_audio_pin *pin, u8 enable_mask)
 444 {
 445         if (rdev->audio.funcs->enable)
 446                 rdev->audio.funcs->enable(rdev, pin, enable_mask);
 447 }
 448
 449 void radeon_audio_fini(struct radeon_device *rdev)
 450 {
 451         int i;
 452
 453         if (!rdev->audio.enabled)
 454                 return;
 455
 456         for (i = 0; i < rdev->audio.num_pins; i++)
 457                 radeon_audio_enable(rdev, &rdev->audio.pin[i], false);
 458
 459         rdev->audio.enabled = false;
 460 }
 461
 462 void radeon_audio_set_dto(struct drm_encoder *encoder, unsigned int clock)
 463 {
 464         struct radeon_device *rdev = encoder->dev->dev_private;
 465         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 466         struct radeon_crtc *crtc = to_radeon_crtc(encoder->crtc);
 467
 468         if (radeon_encoder->audio && radeon_encoder->audio->set_dto)
 469                 radeon_encoder->audio->set_dto(rdev, crtc, clock);
 470 }
 471
 472 int radeon_audio_set_avi_packet(struct drm_encoder *encoder,
 473         struct drm_display_mode *mode)
 474 {
 475     struct radeon_device *rdev = encoder->dev->dev_private;
 476         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 477         struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 478         u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
 479         struct hdmi_avi_infoframe frame;
 480         int err;
 481
 482         err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
 483         if (err < 0) {
 484                 DRM_ERROR("failed to setup AVI infoframe: %d\n", err);
 485                 return err;
 486         }
 487
 488         err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
 489         if (err < 0) {
 490                 DRM_ERROR("failed to pack AVI infoframe: %d\n", err);
 491                 return err;
 492         }
 493
 494         if (dig && dig->afmt &&
 495                 radeon_encoder->audio && radeon_encoder->audio->set_avi_packet)
 496                 radeon_encoder->audio->set_avi_packet(rdev, dig->afmt->offset,
 497                         buffer, sizeof(buffer));
 498
 499         return 0;
 500 }
 501
 502 /*
 503  * calculate CTS and N values if they are not found in the table
 504  */
 505 static void radeon_audio_calc_cts(unsigned int clock, int *CTS, int *N, int freq)
 506 {
 507         int n, cts;
 508         unsigned long div, mul;
 509
 510         /* Safe, but overly large values */
 511         n = 128 * freq;
 512         cts = clock * 1000;
 513
 514         /* Smallest valid fraction */
 515         div = gcd(n, cts);
 516
 517         n /= div;
 518         cts /= div;
 519
 520         /*
 521          * The optimal N is 128*freq/1000. Calculate the closest larger
 522          * value that doesn't truncate any bits.
 523          */
 524         mul = ((128*freq/1000) + (n-1))/n;
 525
 526         n *= mul;
 527         cts *= mul;
 528
 529         /* Check that we are in spec (not always possible) */
 530         if (n < (128*freq/1500))
 531                 printk(KERN_WARNING "Calculated ACR N value is too small. You may experience audio problems.\n");
 532         if (n > (128*freq/300))
 533                 printk(KERN_WARNING "Calculated ACR N value is too large. You may experience audio problems.\n");
 534
 535         *N = n;
 536         *CTS = cts;
 537
 538         DRM_DEBUG("Calculated ACR timing N=%d CTS=%d for frequency %d\n",
 539                 *N, *CTS, freq);
 540 }
 541
 542 static const struct radeon_hdmi_acr* radeon_audio_acr(unsigned int clock)
 543 {
 544         static struct radeon_hdmi_acr res;
 545         u8 i;
 546
 547         static const struct radeon_hdmi_acr hdmi_predefined_acr[] = {
 548                 /*       32kHz    44.1kHz   48kHz    */
 549                 /* Clock      N     CTS      N     CTS      N     CTS */
 550                 {  25175,  4096,  25175, 28224, 125875,  6144,  25175 }, /*  25,20/1.001 MHz */
 551                 {  25200,  4096,  25200,  6272,  28000,  6144,  25200 }, /*  25.20       MHz */
 552                 {  27000,  4096,  27000,  6272,  30000,  6144,  27000 }, /*  27.00       MHz */
 553                 {  27027,  4096,  27027,  6272,  30030,  6144,  27027 }, /*  27.00*1.001 MHz */
 554                 {  54000,  4096,  54000,  6272,  60000,  6144,  54000 }, /*  54.00       MHz */
 555                 {  54054,  4096,  54054,  6272,  60060,  6144,  54054 }, /*  54.00*1.001 MHz */
 556                 {  74176,  4096,  74176,  5733,  75335,  6144,  74176 }, /*  74.25/1.001 MHz */
 557                 {  74250,  4096,  74250,  6272,  82500,  6144,  74250 }, /*  74.25       MHz */
 558                 { 148352,  4096, 148352,  5733, 150670,  6144, 148352 }, /* 148.50/1.001 MHz */
 559                 { 148500,  4096, 148500,  6272, 165000,  6144, 148500 }, /* 148.50       MHz */
 560         };
 561
 562         /* Precalculated values for common clocks */
 563         for (i = 0; i < ARRAY_SIZE(hdmi_predefined_acr); i++)
 564                 if (hdmi_predefined_acr[i].clock == clock)
 565                         return &hdmi_predefined_acr[i];
 566
 567         /* And odd clocks get manually calculated */
 568         radeon_audio_calc_cts(clock, &res.cts_32khz, &res.n_32khz, 32000);
 569         radeon_audio_calc_cts(clock, &res.cts_44_1khz, &res.n_44_1khz, 44100);
 570         radeon_audio_calc_cts(clock, &res.cts_48khz, &res.n_48khz, 48000);
 571
 572         return &res;
 573 }
 574
 575 /*
 576  * update the N and CTS parameters for a given pixel clock rate
 577  */
 578 void radeon_audio_update_acr(struct drm_encoder *encoder, unsigned int clock)
 579 {
 580     const struct radeon_hdmi_acr *acr = radeon_audio_acr(clock);
 581     struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 582     struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 583
 584         if (!dig || !dig->afmt)
 585                 return;
 586
 587         if (radeon_encoder->audio && radeon_encoder->audio->update_acr)
 588                 radeon_encoder->audio->update_acr(encoder, dig->afmt->offset, acr);
 589 }
 590
 591 void radeon_audio_set_vbi_packet(struct drm_encoder *encoder)
 592 {
 593     struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 594     struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 595
 596         if (!dig || !dig->afmt)
 597                 return;
 598
 599         if (radeon_encoder->audio && radeon_encoder->audio->set_vbi_packet)
 600                 radeon_encoder->audio->set_vbi_packet(encoder, dig->afmt->offset);
 601 }
 602
 603 void radeon_hdmi_set_color_depth(struct drm_encoder *encoder)
 604 {
 605         int bpc = 8;
 606         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 607         struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 608
 609         if (!dig || !dig->afmt)
 610                 return;
 611
 612         if (encoder->crtc) {
 613                 struct radeon_crtc *radeon_crtc = to_radeon_crtc(encoder->crtc);
 614                 bpc = radeon_crtc->bpc;
 615         }
 616
 617         if (radeon_encoder->audio && radeon_encoder->audio->set_color_depth)
 618                 radeon_encoder->audio->set_color_depth(encoder, dig->afmt->offset, bpc);
 619 }