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_active_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_hdcp1_create_session,
 172                         &input->create_session, &status,
 173                         hdcp, "create_session"))
 174                 goto out;
 175         if (!mod_hdcp_execute_and_set(mod_hdcp_write_an,
 176                         &input->an_write, &status,
 177                         hdcp, "an_write"))
 178                 goto out;
 179         if (!mod_hdcp_execute_and_set(mod_hdcp_write_aksv,
 180                         &input->aksv_write, &status,
 181                         hdcp, "aksv_write"))
 182                 goto out;
 183         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bksv,
 184                         &input->bksv_read, &status,
 185                         hdcp, "bksv_read"))
 186                 goto out;
 187         if (!mod_hdcp_execute_and_set(validate_bksv,
 188                         &input->bksv_validation, &status,
 189                         hdcp, "bksv_validation"))
 190                 goto out;
 191         if (hdcp->auth.msg.hdcp1.ainfo) {
 192                 if (!mod_hdcp_execute_and_set(mod_hdcp_write_ainfo,
 193                                 &input->ainfo_write, &status,
 194                                 hdcp, "ainfo_write"))
 195                         goto out;
 196         }
 197 out:
 198         return status;
 199 }
 200
 201 static enum mod_hdcp_status computations_validate_rx_test_for_repeater(
 202                 struct mod_hdcp *hdcp,
 203                 struct mod_hdcp_event_context *event_ctx,
 204                 struct mod_hdcp_transition_input_hdcp1 *input)
 205 {
 206         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 207
 208         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 209                 event_ctx->unexpected_event = 1;
 210                 goto out;
 211         }
 212
 213         if (!mod_hdcp_execute_and_set(mod_hdcp_read_r0p,
 214                         &input->r0p_read, &status,
 215                         hdcp, "r0p_read"))
 216                 goto out;
 217         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_validate_rx,
 218                         &input->rx_validation, &status,
 219                         hdcp, "rx_validation"))
 220                 goto out;
 221         if (hdcp->connection.is_repeater) {
 222                 if (!hdcp->connection.link.adjust.hdcp1.postpone_encryption)
 223                         if (!mod_hdcp_execute_and_set(
 224                                         mod_hdcp_hdcp1_enable_encryption,
 225                                         &input->encryption, &status,
 226                                         hdcp, "encryption"))
 227                                 goto out;
 228         } else {
 229                 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_enable_encryption,
 230                                 &input->encryption, &status,
 231                                 hdcp, "encryption"))
 232                         goto out;
 233                 if (is_dp_mst_hdcp(hdcp))
 234                         if (!mod_hdcp_execute_and_set(
 235                                         mod_hdcp_hdcp1_enable_dp_stream_encryption,
 236                                         &input->stream_encryption_dp, &status,
 237                                         hdcp, "stream_encryption_dp"))
 238                                 goto out;
 239         }
 240 out:
 241         return status;
 242 }
 243
 244 static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp,
 245                 struct mod_hdcp_event_context *event_ctx,
 246                 struct mod_hdcp_transition_input_hdcp1 *input)
 247 {
 248         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 249
 250         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 251                 event_ctx->unexpected_event = 1;
 252                 goto out;
 253         }
 254
 255         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_link_maintenance,
 256                         &input->link_maintenance, &status,
 257                         hdcp, "link_maintenance"))
 258                 goto out;
 259 out:
 260         return status;
 261 }
 262
 263 static enum mod_hdcp_status wait_for_ready(struct mod_hdcp *hdcp,
 264                 struct mod_hdcp_event_context *event_ctx,
 265                 struct mod_hdcp_transition_input_hdcp1 *input)
 266 {
 267         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 268
 269         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 270                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
 271                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 272                 event_ctx->unexpected_event = 1;
 273                 goto out;
 274         }
 275
 276         if (is_dp_hdcp(hdcp)) {
 277                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 278                                 &input->bstatus_read, &status,
 279                                 hdcp, "bstatus_read"))
 280                         goto out;
 281                 if (!mod_hdcp_execute_and_set(check_link_integrity_dp,
 282                                 &input->link_integrity_check, &status,
 283                                 hdcp, "link_integrity_check"))
 284                         goto out;
 285                 if (!mod_hdcp_execute_and_set(check_no_reauthentication_request_dp,
 286                                 &input->reauth_request_check, &status,
 287                                 hdcp, "reauth_request_check"))
 288                         goto out;
 289         } else {
 290                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps,
 291                                 &input->bcaps_read, &status,
 292                                 hdcp, "bcaps_read"))
 293                         goto out;
 294         }
 295         if (!mod_hdcp_execute_and_set(check_ksv_ready,
 296                         &input->ready_check, &status,
 297                         hdcp, "ready_check"))
 298                 goto out;
 299 out:
 300         return status;
 301 }
 302
 303 static enum mod_hdcp_status read_ksv_list(struct mod_hdcp *hdcp,
 304                 struct mod_hdcp_event_context *event_ctx,
 305                 struct mod_hdcp_transition_input_hdcp1 *input)
 306 {
 307         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 308         uint8_t device_count;
 309
 310         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 311                 event_ctx->unexpected_event = 1;
 312                 goto out;
 313         }
 314
 315         if (is_dp_hdcp(hdcp)) {
 316                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_binfo,
 317                                 &input->binfo_read_dp, &status,
 318                                 hdcp, "binfo_read_dp"))
 319                         goto out;
 320         } else {
 321                 if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 322                                 &input->bstatus_read, &status,
 323                                 hdcp, "bstatus_read"))
 324                         goto out;
 325         }
 326         if (!mod_hdcp_execute_and_set(check_no_max_cascade,
 327                         &input->max_cascade_check, &status,
 328                         hdcp, "max_cascade_check"))
 329                 goto out;
 330         if (!mod_hdcp_execute_and_set(check_no_max_devs,
 331                         &input->max_devs_check, &status,
 332                         hdcp, "max_devs_check"))
 333                 goto out;
 334         if (!mod_hdcp_execute_and_set(check_device_count,
 335                         &input->device_count_check, &status,
 336                         hdcp, "device_count_check"))
 337                 goto out;
 338         device_count = get_device_count(hdcp);
 339         hdcp->auth.msg.hdcp1.ksvlist_size = device_count*5;
 340         if (!mod_hdcp_execute_and_set(mod_hdcp_read_ksvlist,
 341                         &input->ksvlist_read, &status,
 342                         hdcp, "ksvlist_read"))
 343                 goto out;
 344         if (!mod_hdcp_execute_and_set(mod_hdcp_read_vp,
 345                         &input->vp_read, &status,
 346                         hdcp, "vp_read"))
 347                 goto out;
 348         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_validate_ksvlist_vp,
 349                         &input->ksvlist_vp_validation, &status,
 350                         hdcp, "ksvlist_vp_validation"))
 351                 goto out;
 352         if (input->encryption != PASS)
 353                 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_enable_encryption,
 354                                 &input->encryption, &status,
 355                                 hdcp, "encryption"))
 356                         goto out;
 357         if (is_dp_mst_hdcp(hdcp))
 358                 if (!mod_hdcp_execute_and_set(
 359                                 mod_hdcp_hdcp1_enable_dp_stream_encryption,
 360                                 &input->stream_encryption_dp, &status,
 361                                 hdcp, "stream_encryption_dp"))
 362                         goto out;
 363 out:
 364         return status;
 365 }
 366
 367 static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp,
 368                 struct mod_hdcp_event_context *event_ctx,
 369                 struct mod_hdcp_transition_input_hdcp1 *input)
 370 {
 371         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 372
 373         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 374                 event_ctx->unexpected_event = 1;
 375                 goto out;
 376         }
 377
 378         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps,
 379                         &input->bcaps_read, &status,
 380                         hdcp, "bcaps_read"))
 381                 goto out;
 382         if (!mod_hdcp_execute_and_set(check_hdcp_capable_dp,
 383                         &input->hdcp_capable_dp, &status,
 384                         hdcp, "hdcp_capable_dp"))
 385                 goto out;
 386 out:
 387         return status;
 388 }
 389
 390 static enum mod_hdcp_status wait_for_r0_prime_dp(struct mod_hdcp *hdcp,
 391                 struct mod_hdcp_event_context *event_ctx,
 392                 struct mod_hdcp_transition_input_hdcp1 *input)
 393 {
 394         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 395
 396         if (event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
 397                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 398                 event_ctx->unexpected_event = 1;
 399                 goto out;
 400         }
 401
 402         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 403                         &input->bstatus_read, &status,
 404                         hdcp, "bstatus_read"))
 405                 goto out;
 406         if (!mod_hdcp_execute_and_set(check_r0p_available_dp,
 407                         &input->r0p_available_dp, &status,
 408                         hdcp, "r0p_available_dp"))
 409                 goto out;
 410 out:
 411         return status;
 412 }
 413
 414 static enum mod_hdcp_status authenticated_dp(struct mod_hdcp *hdcp,
 415                 struct mod_hdcp_event_context *event_ctx,
 416                 struct mod_hdcp_transition_input_hdcp1 *input)
 417 {
 418         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 419
 420         if (event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
 421                 event_ctx->unexpected_event = 1;
 422                 goto out;
 423         }
 424
 425         if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
 426                         &input->bstatus_read, &status,
 427                         hdcp, "bstatus_read"))
 428                 goto out;
 429         if (!mod_hdcp_execute_and_set(check_link_integrity_dp,
 430                         &input->link_integrity_check, &status,
 431                         hdcp, "link_integrity_check"))
 432                 goto out;
 433         if (!mod_hdcp_execute_and_set(check_no_reauthentication_request_dp,
 434                         &input->reauth_request_check, &status,
 435                         hdcp, "reauth_request_check"))
 436                 goto out;
 437 out:
 438         return status;
 439 }
 440
 441 uint8_t mod_hdcp_execute_and_set(
 442                 mod_hdcp_action func, uint8_t *flag,
 443                 enum mod_hdcp_status *status, struct mod_hdcp *hdcp, char *str)
 444 {
 445         *status = func(hdcp);
 446         if (*status == MOD_HDCP_STATUS_SUCCESS && *flag != PASS) {
 447                 HDCP_INPUT_PASS_TRACE(hdcp, str);
 448                 *flag = PASS;
 449         } else if (*status != MOD_HDCP_STATUS_SUCCESS && *flag != FAIL) {
 450                 HDCP_INPUT_FAIL_TRACE(hdcp, str);
 451                 *flag = FAIL;
 452         }
 453         return (*status == MOD_HDCP_STATUS_SUCCESS);
 454 }
 455
 456 enum mod_hdcp_status mod_hdcp_hdcp1_execution(struct mod_hdcp *hdcp,
 457                 struct mod_hdcp_event_context *event_ctx,
 458                 struct mod_hdcp_transition_input_hdcp1 *input)
 459 {
 460         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 461
 462         switch (current_state(hdcp)) {
 463         case H1_A0_WAIT_FOR_ACTIVE_RX:
 464                 status = wait_for_active_rx(hdcp, event_ctx, input);
 465                 break;
 466         case H1_A1_EXCHANGE_KSVS:
 467                 status = exchange_ksvs(hdcp, event_ctx, input);
 468                 break;
 469         case H1_A2_COMPUTATIONS_A3_VALIDATE_RX_A6_TEST_FOR_REPEATER:
 470                 status = computations_validate_rx_test_for_repeater(hdcp,
 471                                 event_ctx, input);
 472                 break;
 473         case H1_A45_AUTHENTICATED:
 474                 status = authenticated(hdcp, event_ctx, input);
 475                 break;
 476         case H1_A8_WAIT_FOR_READY:
 477                 status = wait_for_ready(hdcp, event_ctx, input);
 478                 break;
 479         case H1_A9_READ_KSV_LIST:
 480                 status = read_ksv_list(hdcp, event_ctx, input);
 481                 break;
 482         default:
 483                 status = MOD_HDCP_STATUS_INVALID_STATE;
 484                 break;
 485         }
 486
 487         return status;
 488 }
 489
 490 extern enum mod_hdcp_status mod_hdcp_hdcp1_dp_execution(struct mod_hdcp *hdcp,
 491                 struct mod_hdcp_event_context *event_ctx,
 492                 struct mod_hdcp_transition_input_hdcp1 *input)
 493 {
 494         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 495
 496         switch (current_state(hdcp)) {
 497         case D1_A0_DETERMINE_RX_HDCP_CAPABLE:
 498                 status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input);
 499                 break;
 500         case D1_A1_EXCHANGE_KSVS:
 501                 status = exchange_ksvs(hdcp, event_ctx, input);
 502                 break;
 503         case D1_A23_WAIT_FOR_R0_PRIME:
 504                 status = wait_for_r0_prime_dp(hdcp, event_ctx, input);
 505                 break;
 506         case D1_A2_COMPUTATIONS_A3_VALIDATE_RX_A5_TEST_FOR_REPEATER:
 507                 status = computations_validate_rx_test_for_repeater(
 508                                 hdcp, event_ctx, input);
 509                 break;
 510         case D1_A4_AUTHENTICATED:
 511                 status = authenticated_dp(hdcp, event_ctx, input);
 512                 break;
 513         case D1_A6_WAIT_FOR_READY:
 514                 status = wait_for_ready(hdcp, event_ctx, input);
 515                 break;
 516         case D1_A7_READ_KSV_LIST:
 517                 status = read_ksv_list(hdcp, event_ctx, input);
 518                 break;
 519         default:
 520                 status = MOD_HDCP_STATUS_INVALID_STATE;
 521                 break;
 522         }
 523
 524         return status;
 525 }