drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c

   1 /*
   2  * Copyright 2019 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: AMD
  23  *
  24  */
  25
  26 #include "hdcp.h"
  27
  28 static inline enum mod_hdcp_status validate_bksv(struct mod_hdcp *hdcp)
  29 {
  30         uint64_t n = 0;
  31         uint8_t count = 0;
  32
  33         memcpy(&n, hdcp->auth.msg.hdcp1.bksv, sizeof(uint64_t));
  34
  35         while (n) {
  36                 count++;
  37                 n &= (n - 1);
  38         }
  39         return (count == 20) ? MOD_HDCP_STATUS_SUCCESS :
  40                         MOD_HDCP_STATUS_HDCP1_INVALID_BKSV;
  41 }
  42
  43 static inline enum mod_hdcp_status check_ksv_ready(struct mod_hdcp *hdcp)
  44 {
  45         if (is_dp_hdcp(hdcp))
  46                 return (hdcp->auth.msg.hdcp1.bstatus & DP_BSTATUS_READY) ?
  47                                 MOD_HDCP_STATUS_SUCCESS :
  48                                 MOD_HDCP_STATUS_HDCP1_KSV_LIST_NOT_READY;
  49         return (hdcp->auth.msg.hdcp1.bcaps & DRM_HDCP_DDC_BCAPS_KSV_FIFO_READY) ?
  50                         MOD_HDCP_STATUS_SUCCESS :
  51                         MOD_HDCP_STATUS_HDCP1_KSV_LIST_NOT_READY;
  52 }
  53
  54 static inline enum mod_hdcp_status check_hdcp_capable_dp(struct mod_hdcp *hdcp)
  55 {
  56         return (hdcp->auth.msg.hdcp1.bcaps & DP_BCAPS_HDCP_CAPABLE) ?
  57                         MOD_HDCP_STATUS_SUCCESS :
  58                         MOD_HDCP_STATUS_HDCP1_NOT_CAPABLE;
  59 }
  60
  61 static inline enum mod_hdcp_status check_r0p_available_dp(struct mod_hdcp *hdcp)
  62 {
  63         enum mod_hdcp_status status;
  64         if (is_dp_hdcp(hdcp)) {
  65                 status = (hdcp->auth.msg.hdcp1.bstatus &
  66                                 DP_BSTATUS_R0_PRIME_READY) ?
  67                         MOD_HDCP_STATUS_SUCCESS :
  68                         MOD_HDCP_STATUS_HDCP1_R0_PRIME_PENDING;
  69         } else {
  70                 status = MOD_HDCP_STATUS_INVALID_OPERATION;
  71         }
  72         return status;
  73 }
  74
  75 static inline enum mod_hdcp_status check_link_integrity_dp(
  76                 struct mod_hdcp *hdcp)
  77 {
  78         return (hdcp->auth.msg.hdcp1.bstatus &
  79                         DP_BSTATUS_LINK_FAILURE) ?
  80                         MOD_HDCP_STATUS_HDCP1_LINK_INTEGRITY_FAILURE :
  81                         MOD_HDCP_STATUS_SUCCESS;
  82 }
  83
  84 static inline enum mod_hdcp_status check_no_reauthentication_request_dp(
  85                 struct mod_hdcp *hdcp)
  86 {
  87         return (hdcp->auth.msg.hdcp1.bstatus & DP_BSTATUS_REAUTH_REQ) ?
  88                         MOD_HDCP_STATUS_HDCP1_REAUTH_REQUEST_ISSUED :
  89                         MOD_HDCP_STATUS_SUCCESS;
  90 }
  91
  92 static inline enum mod_hdcp_status check_no_max_cascade(struct mod_hdcp *hdcp)
  93 {
  94         enum mod_hdcp_status status;
  95
  96         if (is_dp_hdcp(hdcp))
  97                 status = DRM_HDCP_MAX_CASCADE_EXCEEDED(hdcp->auth.msg.hdcp1.binfo_dp >> 8)
  98                                  ? MOD_HDCP_STATUS_HDCP1_MAX_CASCADE_EXCEEDED_FAILURE
  99                                  : MOD_HDCP_STATUS_SUCCESS;
 100         else
 101                 status = DRM_HDCP_MAX_CASCADE_EXCEEDED(hdcp->auth.msg.hdcp1.bstatus >> 8)
 102                                  ? MOD_HDCP_STATUS_HDCP1_MAX_CASCADE_EXCEEDED_FAILURE
 103                                  : MOD_HDCP_STATUS_SUCCESS;
 104         return status;
 105 }
 106
 107 static inline enum mod_hdcp_status check_no_max_devs(struct mod_hdcp *hdcp)
 108 {
 109         enum mod_hdcp_status status;
 110
 111         if (is_dp_hdcp(hdcp))
 112                 status = DRM_HDCP_MAX_DEVICE_EXCEEDED(hdcp->auth.msg.hdcp1.binfo_dp) ?
 113                                 MOD_HDCP_STATUS_HDCP1_MAX_DEVS_EXCEEDED_FAILURE :
 114                                 MOD_HDCP_STATUS_SUCCESS;
 115         else
 116                 status = DRM_HDCP_MAX_DEVICE_EXCEEDED(hdcp->auth.msg.hdcp1.bstatus) ?
 117                                 MOD_HDCP_STATUS_HDCP1_MAX_DEVS_EXCEEDED_FAILURE :
 118                                 MOD_HDCP_STATUS_SUCCESS;
 119         return status;
 120 }
 121
 122 static inline uint8_t get_device_count(struct mod_hdcp *hdcp)
 123 {
 124         return is_dp_hdcp(hdcp) ?
 125                         DRM_HDCP_NUM_DOWNSTREAM(hdcp->auth.msg.hdcp1.binfo_dp) :
 126                         DRM_HDCP_NUM_DOWNSTREAM(hdcp->auth.msg.hdcp1.bstatus);
 127 }
 128
 129 static inline enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp)
 130 {
 131         /* Some MST display may choose to report the internal panel as an HDCP RX.
 132          * To update this condition with 1(because the immediate repeater's internal
 133          * panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp).
 134          * Device count must be greater than or equal to tracked hdcp displays.
 135          */
 136         return ((1 + get_device_count(hdcp)) < get_active_display_count(hdcp)) ?
 137                         MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE :
 138                         MOD_HDCP_STATUS_SUCCESS;
 139 }
 140
 141 static enum mod_hdcp_status wait_for_active_rx(struct mod_hdcp *hdcp,
 142                 struct mod_hdcp_event_context *event_ctx,
 143                 struct mod_hdcp_transition_input_hdcp1 *input)
 144 {
 145         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 146
 147         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 148                 event_ctx->unexpected_event = 1;
 149                 goto out;
 150         }
 151
 152         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bksv,
 153                         &input->bksv_read, &status,
 154                         hdcp, "bksv_read"))
 155                 goto out;
 156         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps,
 157                         &input->bcaps_read, &status,
 158                         hdcp, "bcaps_read"))
 159                 goto out;
 160 out:
 161         return status;
 162 }
 163
 164 static enum mod_hdcp_status exchange_ksvs(struct mod_hdcp *hdcp,
 165                 struct mod_hdcp_event_context *event_ctx,
 166                 struct mod_hdcp_transition_input_hdcp1 *input)
 167 {
 168         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 169
 170         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 171                 event_ctx->unexpected_event = 1;
 172                 goto out;
 173         }
 174
 175         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_create_session,
 176                         &input->create_session, &status,
 177                         hdcp, "create_session"))
 178                 goto out;
 179         if (!mod_hdcp_execute_and_set(mod_hdcp_write_an,
 180                         &input->an_write, &status,
 181                         hdcp, "an_write"))
 182                 goto out;
 183         if (!mod_hdcp_execute_and_set(mod_hdcp_write_aksv,
 184                         &input->aksv_write, &status,
 185                         hdcp, "aksv_write"))
 186                 goto out;
 187         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bksv,
 188                         &input->bksv_read, &status,
 189                         hdcp, "bksv_read"))
 190                 goto out;
 191         if (!mod_hdcp_execute_and_set(validate_bksv,
 192                         &input->bksv_validation, &status,
 193                         hdcp, "bksv_validation"))
 194                 goto out;
 195         if (hdcp->auth.msg.hdcp1.ainfo) {
 196                 if (!mod_hdcp_execute_and_set(mod_hdcp_write_ainfo,
 197                                 &input->ainfo_write, &status,
 198                                 hdcp, "ainfo_write"))
 199                         goto out;
 200         }
 201 out:
 202         return status;
 203 }
 204
 205 static enum mod_hdcp_status computations_validate_rx_test_for_repeater(
 206                 struct mod_hdcp *hdcp,
 207                 struct mod_hdcp_event_context *event_ctx,
 208                 struct mod_hdcp_transition_input_hdcp1 *input)
 209 {
 210         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 211
 212         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 213                 event_ctx->unexpected_event = 1;
 214                 goto out;
 215         }
 216
 217         if (!mod_hdcp_execute_and_set(mod_hdcp_read_r0p,
 218                         &input->r0p_read, &status,
 219                         hdcp, "r0p_read"))
 220                 goto out;
 221         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_validate_rx,
 222                         &input->rx_validation, &status,
 223                         hdcp, "rx_validation"))
 224                 goto out;
 225         if (hdcp->connection.is_repeater) {
 226                 if (!hdcp->connection.link.adjust.hdcp1.postpone_encryption)
 227                         if (!mod_hdcp_execute_and_set(
 228                                         mod_hdcp_hdcp1_enable_encryption,
 229                                         &input->encryption, &status,
 230                                         hdcp, "encryption"))
 231                                 goto out;
 232         } else {
 233                 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_enable_encryption,
 234                                 &input->encryption, &status,
 235                                 hdcp, "encryption"))
 236                         goto out;
 237                 if (is_dp_mst_hdcp(hdcp))
 238                         if (!mod_hdcp_execute_and_set(
 239                                         mod_hdcp_hdcp1_enable_dp_stream_encryption,
 240                                         &input->stream_encryption_dp, &status,
 241                                         hdcp, "stream_encryption_dp"))
 242                                 goto out;
 243         }
 244 out:
 245         return status;
 246 }
 247
 248 static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp,
 249                 struct mod_hdcp_event_context *event_ctx,
 250                 struct mod_hdcp_transition_input_hdcp1 *input)
 251 {
 252         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 253
 254         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 255                 event_ctx->unexpected_event = 1;
 256                 goto out;
 257         }
 258
 259         mod_hdcp_execute_and_set(mod_hdcp_hdcp1_link_maintenance,
 260                         &input->link_maintenance, &status,
 261                         hdcp, "link_maintenance");
 262
 263         if (status != MOD_HDCP_STATUS_SUCCESS)
 264                 mod_hdcp_save_current_encryption_states(hdcp);
 265 out:
 266         return status;
 267 }
 268
 269 static enum mod_hdcp_status wait_for_ready(struct mod_hdcp *hdcp,
 270                 struct mod_hdcp_event_context *event_ctx,
 271                 struct mod_hdcp_transition_input_hdcp1 *input)
 272 {
 273         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 274
 275         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 276                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
 277                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 278                 event_ctx->unexpected_event = 1;
 279                 goto out;
 280         }
 281
 282         if (is_dp_hdcp(hdcp)) {
 283                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 284                                 &input->bstatus_read, &status,
 285                                 hdcp, "bstatus_read"))
 286                         goto out;
 287                 if (!mod_hdcp_execute_and_set(check_link_integrity_dp,
 288                                 &input->link_integrity_check, &status,
 289                                 hdcp, "link_integrity_check"))
 290                         goto out;
 291                 if (!mod_hdcp_execute_and_set(check_no_reauthentication_request_dp,
 292                                 &input->reauth_request_check, &status,
 293                                 hdcp, "reauth_request_check"))
 294                         goto out;
 295         } else {
 296                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps,
 297                                 &input->bcaps_read, &status,
 298                                 hdcp, "bcaps_read"))
 299                         goto out;
 300         }
 301         if (!mod_hdcp_execute_and_set(check_ksv_ready,
 302                         &input->ready_check, &status,
 303                         hdcp, "ready_check"))
 304                 goto out;
 305 out:
 306         return status;
 307 }
 308
 309 static enum mod_hdcp_status read_ksv_list(struct mod_hdcp *hdcp,
 310                 struct mod_hdcp_event_context *event_ctx,
 311                 struct mod_hdcp_transition_input_hdcp1 *input)
 312 {
 313         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 314         uint8_t device_count;
 315
 316         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 317                 event_ctx->unexpected_event = 1;
 318                 goto out;
 319         }
 320
 321         if (is_dp_hdcp(hdcp)) {
 322                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_binfo,
 323                                 &input->binfo_read_dp, &status,
 324                                 hdcp, "binfo_read_dp"))
 325                         goto out;
 326         } else {
 327                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 328                                 &input->bstatus_read, &status,
 329                                 hdcp, "bstatus_read"))
 330                         goto out;
 331         }
 332         if (!mod_hdcp_execute_and_set(check_no_max_cascade,
 333                         &input->max_cascade_check, &status,
 334                         hdcp, "max_cascade_check"))
 335                 goto out;
 336         if (!mod_hdcp_execute_and_set(check_no_max_devs,
 337                         &input->max_devs_check, &status,
 338                         hdcp, "max_devs_check"))
 339                 goto out;
 340         if (!mod_hdcp_execute_and_set(check_device_count,
 341                         &input->device_count_check, &status,
 342                         hdcp, "device_count_check"))
 343                 goto out;
 344         device_count = get_device_count(hdcp);
 345         hdcp->auth.msg.hdcp1.ksvlist_size = device_count*5;
 346         if (!mod_hdcp_execute_and_set(mod_hdcp_read_ksvlist,
 347                         &input->ksvlist_read, &status,
 348                         hdcp, "ksvlist_read"))
 349                 goto out;
 350         if (!mod_hdcp_execute_and_set(mod_hdcp_read_vp,
 351                         &input->vp_read, &status,
 352                         hdcp, "vp_read"))
 353                 goto out;
 354         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_validate_ksvlist_vp,
 355                         &input->ksvlist_vp_validation, &status,
 356                         hdcp, "ksvlist_vp_validation"))
 357                 goto out;
 358         if (input->encryption != PASS)
 359                 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_enable_encryption,
 360                                 &input->encryption, &status,
 361                                 hdcp, "encryption"))
 362                         goto out;
 363         if (is_dp_mst_hdcp(hdcp))
 364                 if (!mod_hdcp_execute_and_set(
 365                                 mod_hdcp_hdcp1_enable_dp_stream_encryption,
 366                                 &input->stream_encryption_dp, &status,
 367                                 hdcp, "stream_encryption_dp"))
 368                         goto out;
 369 out:
 370         return status;
 371 }
 372
 373 static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp,
 374                 struct mod_hdcp_event_context *event_ctx,
 375                 struct mod_hdcp_transition_input_hdcp1 *input)
 376 {
 377         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 378
 379         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 380                 event_ctx->unexpected_event = 1;
 381                 goto out;
 382         }
 383
 384         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps,
 385                         &input->bcaps_read, &status,
 386                         hdcp, "bcaps_read"))
 387                 goto out;
 388         if (!mod_hdcp_execute_and_set(check_hdcp_capable_dp,
 389                         &input->hdcp_capable_dp, &status,
 390                         hdcp, "hdcp_capable_dp"))
 391                 goto out;
 392 out:
 393         return status;
 394 }
 395
 396 static enum mod_hdcp_status wait_for_r0_prime_dp(struct mod_hdcp *hdcp,
 397                 struct mod_hdcp_event_context *event_ctx,
 398                 struct mod_hdcp_transition_input_hdcp1 *input)
 399 {
 400         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 401
 402         if (event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
 403                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 404                 event_ctx->unexpected_event = 1;
 405                 goto out;
 406         }
 407
 408         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 409                         &input->bstatus_read, &status,
 410                         hdcp, "bstatus_read"))
 411                 goto out;
 412         if (!mod_hdcp_execute_and_set(check_r0p_available_dp,
 413                         &input->r0p_available_dp, &status,
 414                         hdcp, "r0p_available_dp"))
 415                 goto out;
 416 out:
 417         return status;
 418 }
 419
 420 static enum mod_hdcp_status authenticated_dp(struct mod_hdcp *hdcp,
 421                 struct mod_hdcp_event_context *event_ctx,
 422                 struct mod_hdcp_transition_input_hdcp1 *input)
 423 {
 424         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 425
 426         if (event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
 427                 event_ctx->unexpected_event = 1;
 428                 goto out;
 429         }
 430
 431         if (status == MOD_HDCP_STATUS_SUCCESS)
 432                 mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 433                                 &input->bstatus_read, &status,
 434                                 hdcp, "bstatus_read");
 435         if (status == MOD_HDCP_STATUS_SUCCESS)
 436                 mod_hdcp_execute_and_set(check_link_integrity_dp,
 437                                 &input->link_integrity_check, &status,
 438                                 hdcp, "link_integrity_check");
 439         if (status == MOD_HDCP_STATUS_SUCCESS)
 440                 mod_hdcp_execute_and_set(check_no_reauthentication_request_dp,
 441                                 &input->reauth_request_check, &status,
 442                                 hdcp, "reauth_request_check");
 443
 444         if (status != MOD_HDCP_STATUS_SUCCESS)
 445                 mod_hdcp_save_current_encryption_states(hdcp);
 446 out:
 447         return status;
 448 }
 449
 450 uint8_t mod_hdcp_execute_and_set(
 451                 mod_hdcp_action func, uint8_t *flag,
 452                 enum mod_hdcp_status *status, struct mod_hdcp *hdcp, char *str)
 453 {
 454         *status = func(hdcp);
 455         if (*status == MOD_HDCP_STATUS_SUCCESS && *flag != PASS) {
 456                 HDCP_INPUT_PASS_TRACE(hdcp, str);
 457                 *flag = PASS;
 458         } else if (*status != MOD_HDCP_STATUS_SUCCESS && *flag != FAIL) {
 459                 HDCP_INPUT_FAIL_TRACE(hdcp, str);
 460                 *flag = FAIL;
 461         }
 462         return (*status == MOD_HDCP_STATUS_SUCCESS);
 463 }
 464
 465 enum mod_hdcp_status mod_hdcp_hdcp1_execution(struct mod_hdcp *hdcp,
 466                 struct mod_hdcp_event_context *event_ctx,
 467                 struct mod_hdcp_transition_input_hdcp1 *input)
 468 {
 469         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 470
 471         switch (current_state(hdcp)) {
 472         case H1_A0_WAIT_FOR_ACTIVE_RX:
 473                 status = wait_for_active_rx(hdcp, event_ctx, input);
 474                 break;
 475         case H1_A1_EXCHANGE_KSVS:
 476                 status = exchange_ksvs(hdcp, event_ctx, input);
 477                 break;
 478         case H1_A2_COMPUTATIONS_A3_VALIDATE_RX_A6_TEST_FOR_REPEATER:
 479                 status = computations_validate_rx_test_for_repeater(hdcp,
 480                                 event_ctx, input);
 481                 break;
 482         case H1_A45_AUTHENTICATED:
 483                 status = authenticated(hdcp, event_ctx, input);
 484                 break;
 485         case H1_A8_WAIT_FOR_READY:
 486                 status = wait_for_ready(hdcp, event_ctx, input);
 487                 break;
 488         case H1_A9_READ_KSV_LIST:
 489                 status = read_ksv_list(hdcp, event_ctx, input);
 490                 break;
 491         default:
 492                 status = MOD_HDCP_STATUS_INVALID_STATE;
 493                 break;
 494         }
 495
 496         return status;
 497 }
 498
 499 extern enum mod_hdcp_status mod_hdcp_hdcp1_dp_execution(struct mod_hdcp *hdcp,
 500                 struct mod_hdcp_event_context *event_ctx,
 501                 struct mod_hdcp_transition_input_hdcp1 *input)
 502 {
 503         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 504
 505         switch (current_state(hdcp)) {
 506         case D1_A0_DETERMINE_RX_HDCP_CAPABLE:
 507                 status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input);
 508                 break;
 509         case D1_A1_EXCHANGE_KSVS:
 510                 status = exchange_ksvs(hdcp, event_ctx, input);
 511                 break;
 512         case D1_A23_WAIT_FOR_R0_PRIME:
 513                 status = wait_for_r0_prime_dp(hdcp, event_ctx, input);
 514                 break;
 515         case D1_A2_COMPUTATIONS_A3_VALIDATE_RX_A5_TEST_FOR_REPEATER:
 516                 status = computations_validate_rx_test_for_repeater(
 517                                 hdcp, event_ctx, input);
 518                 break;
 519         case D1_A4_AUTHENTICATED:
 520                 status = authenticated_dp(hdcp, event_ctx, input);
 521                 break;
 522         case D1_A6_WAIT_FOR_READY:
 523                 status = wait_for_ready(hdcp, event_ctx, input);
 524                 break;
 525         case D1_A7_READ_KSV_LIST:
 526                 status = read_ksv_list(hdcp, event_ctx, input);
 527                 break;
 528         default:
 529                 status = MOD_HDCP_STATUS_INVALID_STATE;
 530                 break;
 531         }
 532
 533         return status;
 534 }