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         /* device count must be greater than or equal to tracked hdcp displays */
 132         return (get_device_count(hdcp) < get_added_display_count(hdcp)) ?
 133                         MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE :
 134                         MOD_HDCP_STATUS_SUCCESS;
 135 }
 136
 137 static enum mod_hdcp_status wait_for_active_rx(struct mod_hdcp *hdcp,
 138                 struct mod_hdcp_event_context *event_ctx,
 139                 struct mod_hdcp_transition_input_hdcp1 *input)
 140 {
 141         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 142
 143         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 144                 event_ctx->unexpected_event = 1;
 145                 goto out;
 146         }
 147
 148         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bksv,
 149                         &input->bksv_read, &status,
 150                         hdcp, "bksv_read"))
 151                 goto out;
 152         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps,
 153                         &input->bcaps_read, &status,
 154                         hdcp, "bcaps_read"))
 155                 goto out;
 156 out:
 157         return status;
 158 }
 159
 160 static enum mod_hdcp_status exchange_ksvs(struct mod_hdcp *hdcp,
 161                 struct mod_hdcp_event_context *event_ctx,
 162                 struct mod_hdcp_transition_input_hdcp1 *input)
 163 {
 164         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 165
 166         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 167                 event_ctx->unexpected_event = 1;
 168                 goto out;
 169         }
 170
 171         if (!mod_hdcp_execute_and_set(mod_hdcp_add_display_topology,
 172                         &input->add_topology, &status,
 173                         hdcp, "add_topology"))
 174                 goto out;
 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         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_link_maintenance,
 260                         &input->link_maintenance, &status,
 261                         hdcp, "link_maintenance"))
 262                 goto out;
 263 out:
 264         return status;
 265 }
 266
 267 static enum mod_hdcp_status wait_for_ready(struct mod_hdcp *hdcp,
 268                 struct mod_hdcp_event_context *event_ctx,
 269                 struct mod_hdcp_transition_input_hdcp1 *input)
 270 {
 271         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 272
 273         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 274                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
 275                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 276                 event_ctx->unexpected_event = 1;
 277                 goto out;
 278         }
 279
 280         if (is_dp_hdcp(hdcp)) {
 281                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 282                                 &input->bstatus_read, &status,
 283                                 hdcp, "bstatus_read"))
 284                         goto out;
 285                 if (!mod_hdcp_execute_and_set(check_link_integrity_dp,
 286                                 &input->link_integiry_check, &status,
 287                                 hdcp, "link_integiry_check"))
 288                         goto out;
 289                 if (!mod_hdcp_execute_and_set(check_no_reauthentication_request_dp,
 290                                 &input->reauth_request_check, &status,
 291                                 hdcp, "reauth_request_check"))
 292                         goto out;
 293         } else {
 294                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps,
 295                                 &input->bcaps_read, &status,
 296                                 hdcp, "bcaps_read"))
 297                         goto out;
 298         }
 299         if (!mod_hdcp_execute_and_set(check_ksv_ready,
 300                         &input->ready_check, &status,
 301                         hdcp, "ready_check"))
 302                 goto out;
 303 out:
 304         return status;
 305 }
 306
 307 static enum mod_hdcp_status read_ksv_list(struct mod_hdcp *hdcp,
 308                 struct mod_hdcp_event_context *event_ctx,
 309                 struct mod_hdcp_transition_input_hdcp1 *input)
 310 {
 311         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 312         uint8_t device_count;
 313
 314         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 315                 event_ctx->unexpected_event = 1;
 316                 goto out;
 317         }
 318
 319         if (is_dp_hdcp(hdcp)) {
 320                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_binfo,
 321                                 &input->binfo_read_dp, &status,
 322                                 hdcp, "binfo_read_dp"))
 323                         goto out;
 324         } else {
 325                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 326                                 &input->bstatus_read, &status,
 327                                 hdcp, "bstatus_read"))
 328                         goto out;
 329         }
 330         if (!mod_hdcp_execute_and_set(check_no_max_cascade,
 331                         &input->max_cascade_check, &status,
 332                         hdcp, "max_cascade_check"))
 333                 goto out;
 334         if (!mod_hdcp_execute_and_set(check_no_max_devs,
 335                         &input->max_devs_check, &status,
 336                         hdcp, "max_devs_check"))
 337                 goto out;
 338         if (!mod_hdcp_execute_and_set(check_device_count,
 339                         &input->device_count_check, &status,
 340                         hdcp, "device_count_check"))
 341                 goto out;
 342         device_count = get_device_count(hdcp);
 343         hdcp->auth.msg.hdcp1.ksvlist_size = device_count*5;
 344         if (!mod_hdcp_execute_and_set(mod_hdcp_read_ksvlist,
 345                         &input->ksvlist_read, &status,
 346                         hdcp, "ksvlist_read"))
 347                 goto out;
 348         if (!mod_hdcp_execute_and_set(mod_hdcp_read_vp,
 349                         &input->vp_read, &status,
 350                         hdcp, "vp_read"))
 351                 goto out;
 352         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_validate_ksvlist_vp,
 353                         &input->ksvlist_vp_validation, &status,
 354                         hdcp, "ksvlist_vp_validation"))
 355                 goto out;
 356         if (input->encryption != PASS)
 357                 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_enable_encryption,
 358                                 &input->encryption, &status,
 359                                 hdcp, "encryption"))
 360                         goto out;
 361         if (is_dp_mst_hdcp(hdcp))
 362                 if (!mod_hdcp_execute_and_set(
 363                                 mod_hdcp_hdcp1_enable_dp_stream_encryption,
 364                                 &input->stream_encryption_dp, &status,
 365                                 hdcp, "stream_encryption_dp"))
 366                         goto out;
 367 out:
 368         return status;
 369 }
 370
 371 static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp,
 372                 struct mod_hdcp_event_context *event_ctx,
 373                 struct mod_hdcp_transition_input_hdcp1 *input)
 374 {
 375         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 376
 377         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 378                 event_ctx->unexpected_event = 1;
 379                 goto out;
 380         }
 381
 382         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps,
 383                         &input->bcaps_read, &status,
 384                         hdcp, "bcaps_read"))
 385                 goto out;
 386         if (!mod_hdcp_execute_and_set(check_hdcp_capable_dp,
 387                         &input->hdcp_capable_dp, &status,
 388                         hdcp, "hdcp_capable_dp"))
 389                 goto out;
 390 out:
 391         return status;
 392 }
 393
 394 static enum mod_hdcp_status wait_for_r0_prime_dp(struct mod_hdcp *hdcp,
 395                 struct mod_hdcp_event_context *event_ctx,
 396                 struct mod_hdcp_transition_input_hdcp1 *input)
 397 {
 398         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 399
 400         if (event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
 401                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 402                 event_ctx->unexpected_event = 1;
 403                 goto out;
 404         }
 405
 406         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 407                         &input->bstatus_read, &status,
 408                         hdcp, "bstatus_read"))
 409                 goto out;
 410         if (!mod_hdcp_execute_and_set(check_r0p_available_dp,
 411                         &input->r0p_available_dp, &status,
 412                         hdcp, "r0p_available_dp"))
 413                 goto out;
 414 out:
 415         return status;
 416 }
 417
 418 static enum mod_hdcp_status authenticated_dp(struct mod_hdcp *hdcp,
 419                 struct mod_hdcp_event_context *event_ctx,
 420                 struct mod_hdcp_transition_input_hdcp1 *input)
 421 {
 422         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 423
 424         if (event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
 425                 event_ctx->unexpected_event = 1;
 426                 goto out;
 427         }
 428
 429         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 430                         &input->bstatus_read, &status,
 431                         hdcp, "bstatus_read"))
 432                 goto out;
 433         if (!mod_hdcp_execute_and_set(check_link_integrity_dp,
 434                         &input->link_integiry_check, &status,
 435                         hdcp, "link_integiry_check"))
 436                 goto out;
 437         if (!mod_hdcp_execute_and_set(check_no_reauthentication_request_dp,
 438                         &input->reauth_request_check, &status,
 439                         hdcp, "reauth_request_check"))
 440                 goto out;
 441 out:
 442         return status;
 443 }
 444
 445 uint8_t mod_hdcp_execute_and_set(
 446                 mod_hdcp_action func, uint8_t *flag,
 447                 enum mod_hdcp_status *status, struct mod_hdcp *hdcp, char *str)
 448 {
 449         *status = func(hdcp);
 450         if (*status == MOD_HDCP_STATUS_SUCCESS && *flag != PASS) {
 451                 HDCP_INPUT_PASS_TRACE(hdcp, str);
 452                 *flag = PASS;
 453         } else if (*status != MOD_HDCP_STATUS_SUCCESS && *flag != FAIL) {
 454                 HDCP_INPUT_FAIL_TRACE(hdcp, str);
 455                 *flag = FAIL;
 456         }
 457         return (*status == MOD_HDCP_STATUS_SUCCESS);
 458 }
 459
 460 enum mod_hdcp_status mod_hdcp_hdcp1_execution(struct mod_hdcp *hdcp,
 461                 struct mod_hdcp_event_context *event_ctx,
 462                 struct mod_hdcp_transition_input_hdcp1 *input)
 463 {
 464         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 465
 466         switch (current_state(hdcp)) {
 467         case H1_A0_WAIT_FOR_ACTIVE_RX:
 468                 status = wait_for_active_rx(hdcp, event_ctx, input);
 469                 break;
 470         case H1_A1_EXCHANGE_KSVS:
 471                 status = exchange_ksvs(hdcp, event_ctx, input);
 472                 break;
 473         case H1_A2_COMPUTATIONS_A3_VALIDATE_RX_A6_TEST_FOR_REPEATER:
 474                 status = computations_validate_rx_test_for_repeater(hdcp,
 475                                 event_ctx, input);
 476                 break;
 477         case H1_A45_AUTHENTICATED:
 478                 status = authenticated(hdcp, event_ctx, input);
 479                 break;
 480         case H1_A8_WAIT_FOR_READY:
 481                 status = wait_for_ready(hdcp, event_ctx, input);
 482                 break;
 483         case H1_A9_READ_KSV_LIST:
 484                 status = read_ksv_list(hdcp, event_ctx, input);
 485                 break;
 486         default:
 487                 status = MOD_HDCP_STATUS_INVALID_STATE;
 488                 break;
 489         }
 490
 491         return status;
 492 }
 493
 494 extern enum mod_hdcp_status mod_hdcp_hdcp1_dp_execution(struct mod_hdcp *hdcp,
 495                 struct mod_hdcp_event_context *event_ctx,
 496                 struct mod_hdcp_transition_input_hdcp1 *input)
 497 {
 498         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 499
 500         switch (current_state(hdcp)) {
 501         case D1_A0_DETERMINE_RX_HDCP_CAPABLE:
 502                 status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input);
 503                 break;
 504         case D1_A1_EXCHANGE_KSVS:
 505                 status = exchange_ksvs(hdcp, event_ctx, input);
 506                 break;
 507         case D1_A23_WAIT_FOR_R0_PRIME:
 508                 status = wait_for_r0_prime_dp(hdcp, event_ctx, input);
 509                 break;
 510         case D1_A2_COMPUTATIONS_A3_VALIDATE_RX_A5_TEST_FOR_REPEATER:
 511                 status = computations_validate_rx_test_for_repeater(
 512                                 hdcp, event_ctx, input);
 513                 break;
 514         case D1_A4_AUTHENTICATED:
 515                 status = authenticated_dp(hdcp, event_ctx, input);
 516                 break;
 517         case D1_A6_WAIT_FOR_READY:
 518                 status = wait_for_ready(hdcp, event_ctx, input);
 519                 break;
 520         case D1_A7_READ_KSV_LIST:
 521                 status = read_ksv_list(hdcp, event_ctx, input);
 522                 break;
 523         default:
 524                 status = MOD_HDCP_STATUS_INVALID_STATE;
 525                 break;
 526         }
 527
 528         return status;
 529 }