drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c

   1 /*
   2  * Copyright 2018 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 <linux/delay.h>
  27
  28 #include "hdcp.h"
  29
  30 static inline enum mod_hdcp_status check_receiver_id_list_ready(struct mod_hdcp *hdcp)
  31 {
  32         uint8_t is_ready = 0;
  33
  34         if (is_dp_hdcp(hdcp))
  35                 is_ready = HDCP_2_2_DP_RXSTATUS_READY(hdcp->auth.msg.hdcp2.rxstatus_dp) ? 1 : 0;
  36         else
  37                 is_ready = (HDCP_2_2_HDMI_RXSTATUS_READY(hdcp->auth.msg.hdcp2.rxstatus[1]) &&
  38                                 (HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
  39                                                 hdcp->auth.msg.hdcp2.rxstatus[0])) ? 1 : 0;
  40         return is_ready ? MOD_HDCP_STATUS_SUCCESS :
  41                         MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY;
  42 }
  43
  44 static inline enum mod_hdcp_status check_hdcp2_capable(struct mod_hdcp *hdcp)
  45 {
  46         enum mod_hdcp_status status;
  47
  48         if (is_dp_hdcp(hdcp))
  49                 status = (hdcp->auth.msg.hdcp2.rxcaps_dp[0] == HDCP_2_2_RX_CAPS_VERSION_VAL) &&
  50                                 HDCP_2_2_DP_HDCP_CAPABLE(hdcp->auth.msg.hdcp2.rxcaps_dp[2]) ?
  51                                 MOD_HDCP_STATUS_SUCCESS :
  52                                 MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE;
  53         else
  54                 status = (hdcp->auth.msg.hdcp2.hdcp2version_hdmi & HDCP_2_2_HDMI_SUPPORT_MASK) ?
  55                                 MOD_HDCP_STATUS_SUCCESS :
  56                                 MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE;
  57         return status;
  58 }
  59
  60 static inline enum mod_hdcp_status check_reauthentication_request(
  61                 struct mod_hdcp *hdcp)
  62 {
  63         uint8_t ret = 0;
  64
  65         if (is_dp_hdcp(hdcp))
  66                 ret = HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
  67                                 MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST :
  68                                 MOD_HDCP_STATUS_SUCCESS;
  69         else
  70                 ret = HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus[1]) ?
  71                                 MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST :
  72                                 MOD_HDCP_STATUS_SUCCESS;
  73         return ret;
  74 }
  75
  76 static inline enum mod_hdcp_status check_link_integrity_failure_dp(
  77                 struct mod_hdcp *hdcp)
  78 {
  79         return HDCP_2_2_DP_RXSTATUS_LINK_FAILED(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
  80                         MOD_HDCP_STATUS_HDCP2_REAUTH_LINK_INTEGRITY_FAILURE :
  81                         MOD_HDCP_STATUS_SUCCESS;
  82 }
  83
  84 static enum mod_hdcp_status check_ake_cert_available(struct mod_hdcp *hdcp)
  85 {
  86         enum mod_hdcp_status status;
  87         uint16_t size;
  88
  89         if (is_dp_hdcp(hdcp)) {
  90                 status = MOD_HDCP_STATUS_SUCCESS;
  91         } else {
  92                 status = mod_hdcp_read_rxstatus(hdcp);
  93                 if (status == MOD_HDCP_STATUS_SUCCESS) {
  94                         size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
  95                                hdcp->auth.msg.hdcp2.rxstatus[0];
  96                         status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_cert)) ?
  97                                         MOD_HDCP_STATUS_SUCCESS :
  98                                         MOD_HDCP_STATUS_HDCP2_AKE_CERT_PENDING;
  99                 }
 100         }
 101         return status;
 102 }
 103
 104 static enum mod_hdcp_status check_h_prime_available(struct mod_hdcp *hdcp)
 105 {
 106         enum mod_hdcp_status status;
 107         uint8_t size;
 108
 109         status = mod_hdcp_read_rxstatus(hdcp);
 110         if (status != MOD_HDCP_STATUS_SUCCESS)
 111                 goto out;
 112
 113         if (is_dp_hdcp(hdcp)) {
 114                 status = HDCP_2_2_DP_RXSTATUS_H_PRIME(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
 115                                 MOD_HDCP_STATUS_SUCCESS :
 116                                 MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING;
 117         } else {
 118                 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
 119                        hdcp->auth.msg.hdcp2.rxstatus[0];
 120                 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_h_prime)) ?
 121                                 MOD_HDCP_STATUS_SUCCESS :
 122                                 MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING;
 123         }
 124 out:
 125         return status;
 126 }
 127
 128 static enum mod_hdcp_status check_pairing_info_available(struct mod_hdcp *hdcp)
 129 {
 130         enum mod_hdcp_status status;
 131         uint8_t size;
 132
 133         status = mod_hdcp_read_rxstatus(hdcp);
 134         if (status != MOD_HDCP_STATUS_SUCCESS)
 135                 goto out;
 136
 137         if (is_dp_hdcp(hdcp)) {
 138                 status = HDCP_2_2_DP_RXSTATUS_PAIRING(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
 139                                 MOD_HDCP_STATUS_SUCCESS :
 140                                 MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING;
 141         } else {
 142                 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
 143                        hdcp->auth.msg.hdcp2.rxstatus[0];
 144                 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_pairing_info)) ?
 145                                 MOD_HDCP_STATUS_SUCCESS :
 146                                 MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING;
 147         }
 148 out:
 149         return status;
 150 }
 151
 152 static enum mod_hdcp_status poll_l_prime_available(struct mod_hdcp *hdcp)
 153 {
 154         enum mod_hdcp_status status = MOD_HDCP_STATUS_FAILURE;
 155         uint8_t size;
 156         uint16_t max_wait = 20; // units of ms
 157         uint16_t num_polls = 5;
 158         uint16_t wait_time = max_wait / num_polls;
 159
 160         if (is_dp_hdcp(hdcp))
 161                 status = MOD_HDCP_STATUS_INVALID_OPERATION;
 162         else
 163                 for (; num_polls; num_polls--) {
 164                         msleep(wait_time);
 165
 166                         status = mod_hdcp_read_rxstatus(hdcp);
 167                         if (status != MOD_HDCP_STATUS_SUCCESS)
 168                                 break;
 169
 170                         size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
 171                                hdcp->auth.msg.hdcp2.rxstatus[0];
 172                         status = (size == sizeof(hdcp->auth.msg.hdcp2.lc_l_prime)) ?
 173                                         MOD_HDCP_STATUS_SUCCESS :
 174                                         MOD_HDCP_STATUS_HDCP2_L_PRIME_PENDING;
 175                         if (status == MOD_HDCP_STATUS_SUCCESS)
 176                                 break;
 177                 }
 178         return status;
 179 }
 180
 181 static enum mod_hdcp_status check_stream_ready_available(struct mod_hdcp *hdcp)
 182 {
 183         enum mod_hdcp_status status;
 184         uint8_t size;
 185
 186         if (is_dp_hdcp(hdcp)) {
 187                 status = MOD_HDCP_STATUS_INVALID_OPERATION;
 188         } else {
 189                 status = mod_hdcp_read_rxstatus(hdcp);
 190                 if (status != MOD_HDCP_STATUS_SUCCESS)
 191                         goto out;
 192                 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
 193                        hdcp->auth.msg.hdcp2.rxstatus[0];
 194                 status = (size == sizeof(hdcp->auth.msg.hdcp2.repeater_auth_stream_ready)) ?
 195                                 MOD_HDCP_STATUS_SUCCESS :
 196                                 MOD_HDCP_STATUS_HDCP2_STREAM_READY_PENDING;
 197         }
 198 out:
 199         return status;
 200 }
 201
 202 static inline uint8_t get_device_count(struct mod_hdcp *hdcp)
 203 {
 204         return HDCP_2_2_DEV_COUNT_LO(hdcp->auth.msg.hdcp2.rx_id_list[2]) +
 205                         (HDCP_2_2_DEV_COUNT_HI(hdcp->auth.msg.hdcp2.rx_id_list[1]) << 4);
 206 }
 207
 208 static enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp)
 209 {
 210         /* Avoid device count == 0 to do authentication */
 211         if (get_device_count(hdcp) == 0)
 212                 return MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE;
 213
 214         /* Some MST display may choose to report the internal panel as an HDCP RX.   */
 215         /* To update this condition with 1(because the immediate repeater's internal */
 216         /* panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp). */
 217         /* Device count must be greater than or equal to tracked hdcp displays.      */
 218         return ((1 + get_device_count(hdcp)) < get_active_display_count(hdcp)) ?
 219                         MOD_HDCP_STATUS_HDCP2_DEVICE_COUNT_MISMATCH_FAILURE :
 220                         MOD_HDCP_STATUS_SUCCESS;
 221 }
 222
 223 static uint8_t process_rxstatus(struct mod_hdcp *hdcp,
 224                 struct mod_hdcp_event_context *event_ctx,
 225                 struct mod_hdcp_transition_input_hdcp2 *input,
 226                 enum mod_hdcp_status *status)
 227 {
 228         if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxstatus,
 229                         &input->rxstatus_read, status,
 230                         hdcp, "rxstatus_read"))
 231                 goto out;
 232         if (!mod_hdcp_execute_and_set(check_reauthentication_request,
 233                         &input->reauth_request_check, status,
 234                         hdcp, "reauth_request_check"))
 235                 goto out;
 236         if (is_dp_hdcp(hdcp)) {
 237                 if (!mod_hdcp_execute_and_set(check_link_integrity_failure_dp,
 238                                 &input->link_integrity_check_dp, status,
 239                                 hdcp, "link_integrity_check_dp"))
 240                         goto out;
 241         }
 242         if (hdcp->connection.is_repeater)
 243                 if (check_receiver_id_list_ready(hdcp) ==
 244                                 MOD_HDCP_STATUS_SUCCESS) {
 245                         HDCP_INPUT_PASS_TRACE(hdcp, "rx_id_list_ready");
 246                         event_ctx->rx_id_list_ready = 1;
 247                         if (is_dp_hdcp(hdcp))
 248                                 hdcp->auth.msg.hdcp2.rx_id_list_size =
 249                                                 sizeof(hdcp->auth.msg.hdcp2.rx_id_list);
 250                         else
 251                                 hdcp->auth.msg.hdcp2.rx_id_list_size =
 252                                         HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
 253                                         hdcp->auth.msg.hdcp2.rxstatus[0];
 254                 }
 255 out:
 256         return (*status == MOD_HDCP_STATUS_SUCCESS);
 257 }
 258
 259 static enum mod_hdcp_status known_hdcp2_capable_rx(struct mod_hdcp *hdcp,
 260                 struct mod_hdcp_event_context *event_ctx,
 261                 struct mod_hdcp_transition_input_hdcp2 *input)
 262 {
 263         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 264
 265         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 266                 event_ctx->unexpected_event = 1;
 267                 goto out;
 268         }
 269
 270         if (!mod_hdcp_execute_and_set(mod_hdcp_read_hdcp2version,
 271                         &input->hdcp2version_read, &status,
 272                         hdcp, "hdcp2version_read"))
 273                 goto out;
 274         if (!mod_hdcp_execute_and_set(check_hdcp2_capable,
 275                         &input->hdcp2_capable_check, &status,
 276                         hdcp, "hdcp2_capable"))
 277                 goto out;
 278 out:
 279         return status;
 280 }
 281
 282 static enum mod_hdcp_status send_ake_init(struct mod_hdcp *hdcp,
 283                 struct mod_hdcp_event_context *event_ctx,
 284                 struct mod_hdcp_transition_input_hdcp2 *input)
 285 {
 286         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 287
 288         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 289                 event_ctx->unexpected_event = 1;
 290                 goto out;
 291         }
 292
 293         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_create_session,
 294                         &input->create_session, &status,
 295                         hdcp, "create_session"))
 296                 goto out;
 297         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_ake_init,
 298                         &input->ake_init_prepare, &status,
 299                         hdcp, "ake_init_prepare"))
 300                 goto out;
 301         if (!mod_hdcp_execute_and_set(mod_hdcp_write_ake_init,
 302                         &input->ake_init_write, &status,
 303                         hdcp, "ake_init_write"))
 304                 goto out;
 305 out:
 306         return status;
 307 }
 308
 309 static enum mod_hdcp_status validate_ake_cert(struct mod_hdcp *hdcp,
 310                 struct mod_hdcp_event_context *event_ctx,
 311                 struct mod_hdcp_transition_input_hdcp2 *input)
 312 {
 313         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 314
 315
 316         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 317                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 318                 event_ctx->unexpected_event = 1;
 319                 goto out;
 320         }
 321
 322         if (is_hdmi_dvi_sl_hdcp(hdcp))
 323                 if (!mod_hdcp_execute_and_set(check_ake_cert_available,
 324                                 &input->ake_cert_available, &status,
 325                                 hdcp, "ake_cert_available"))
 326                         goto out;
 327         if (!mod_hdcp_execute_and_set(mod_hdcp_read_ake_cert,
 328                         &input->ake_cert_read, &status,
 329                         hdcp, "ake_cert_read"))
 330                 goto out;
 331         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_ake_cert,
 332                         &input->ake_cert_validation, &status,
 333                         hdcp, "ake_cert_validation"))
 334                 goto out;
 335 out:
 336         return status;
 337 }
 338
 339 static enum mod_hdcp_status send_no_stored_km(struct mod_hdcp *hdcp,
 340                 struct mod_hdcp_event_context *event_ctx,
 341                 struct mod_hdcp_transition_input_hdcp2 *input)
 342 {
 343         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 344
 345         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 346                 event_ctx->unexpected_event = 1;
 347                 goto out;
 348         }
 349
 350         if (!mod_hdcp_execute_and_set(mod_hdcp_write_no_stored_km,
 351                         &input->no_stored_km_write, &status,
 352                         hdcp, "no_stored_km_write"))
 353                 goto out;
 354 out:
 355         return status;
 356 }
 357
 358 static enum mod_hdcp_status read_h_prime(struct mod_hdcp *hdcp,
 359                 struct mod_hdcp_event_context *event_ctx,
 360                 struct mod_hdcp_transition_input_hdcp2 *input)
 361 {
 362         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 363
 364         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 365                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
 366                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 367                 event_ctx->unexpected_event = 1;
 368                 goto out;
 369         }
 370
 371         if (!mod_hdcp_execute_and_set(check_h_prime_available,
 372                         &input->h_prime_available, &status,
 373                         hdcp, "h_prime_available"))
 374                 goto out;
 375
 376         if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime,
 377                         &input->h_prime_read, &status,
 378                         hdcp, "h_prime_read"))
 379                 goto out;
 380 out:
 381         return status;
 382 }
 383
 384 static enum mod_hdcp_status read_pairing_info_and_validate_h_prime(
 385                 struct mod_hdcp *hdcp,
 386                 struct mod_hdcp_event_context *event_ctx,
 387                 struct mod_hdcp_transition_input_hdcp2 *input)
 388 {
 389         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 390
 391         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 392                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
 393                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 394                 event_ctx->unexpected_event = 1;
 395                 goto out;
 396         }
 397
 398         if (!mod_hdcp_execute_and_set(check_pairing_info_available,
 399                         &input->pairing_available, &status,
 400                         hdcp, "pairing_available"))
 401                 goto out;
 402         if (!mod_hdcp_execute_and_set(mod_hdcp_read_pairing_info,
 403                         &input->pairing_info_read, &status,
 404                         hdcp, "pairing_info_read"))
 405                 goto out;
 406         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime,
 407                         &input->h_prime_validation, &status,
 408                         hdcp, "h_prime_validation"))
 409                 goto out;
 410 out:
 411         return status;
 412 }
 413
 414 static enum mod_hdcp_status send_stored_km(struct mod_hdcp *hdcp,
 415                 struct mod_hdcp_event_context *event_ctx,
 416                 struct mod_hdcp_transition_input_hdcp2 *input)
 417 {
 418         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 419
 420         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 421                 event_ctx->unexpected_event = 1;
 422                 goto out;
 423         }
 424
 425         if (!mod_hdcp_execute_and_set(mod_hdcp_write_stored_km,
 426                         &input->stored_km_write, &status,
 427                         hdcp, "stored_km_write"))
 428                 goto out;
 429 out:
 430         return status;
 431 }
 432
 433 static enum mod_hdcp_status validate_h_prime(struct mod_hdcp *hdcp,
 434                 struct mod_hdcp_event_context *event_ctx,
 435                 struct mod_hdcp_transition_input_hdcp2 *input)
 436 {
 437         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 438
 439         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 440                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
 441                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 442                 event_ctx->unexpected_event = 1;
 443                 goto out;
 444         }
 445
 446         if (!mod_hdcp_execute_and_set(check_h_prime_available,
 447                         &input->h_prime_available, &status,
 448                         hdcp, "h_prime_available"))
 449                 goto out;
 450         if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime,
 451                         &input->h_prime_read, &status,
 452                         hdcp, "h_prime_read"))
 453                 goto out;
 454         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime,
 455                         &input->h_prime_validation, &status,
 456                         hdcp, "h_prime_validation"))
 457                 goto out;
 458 out:
 459         return status;
 460 }
 461
 462 static enum mod_hdcp_status locality_check(struct mod_hdcp *hdcp,
 463                 struct mod_hdcp_event_context *event_ctx,
 464                 struct mod_hdcp_transition_input_hdcp2 *input)
 465 {
 466         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 467
 468         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 469                 event_ctx->unexpected_event = 1;
 470                 goto out;
 471         }
 472
 473         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_lc_init,
 474                         &input->lc_init_prepare, &status,
 475                         hdcp, "lc_init_prepare"))
 476                 goto out;
 477         if (!mod_hdcp_execute_and_set(mod_hdcp_write_lc_init,
 478                         &input->lc_init_write, &status,
 479                          hdcp, "lc_init_write"))
 480                 goto out;
 481         if (is_dp_hdcp(hdcp))
 482                 msleep(16);
 483         else
 484                 if (!mod_hdcp_execute_and_set(poll_l_prime_available,
 485                                 &input->l_prime_available_poll, &status,
 486                                 hdcp, "l_prime_available_poll"))
 487                         goto out;
 488         if (!mod_hdcp_execute_and_set(mod_hdcp_read_l_prime,
 489                         &input->l_prime_read, &status,
 490                         hdcp, "l_prime_read"))
 491                 goto out;
 492         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_l_prime,
 493                         &input->l_prime_validation, &status,
 494                         hdcp, "l_prime_validation"))
 495                 goto out;
 496 out:
 497         return status;
 498 }
 499
 500 static enum mod_hdcp_status exchange_ks_and_test_for_repeater(struct mod_hdcp *hdcp,
 501                 struct mod_hdcp_event_context *event_ctx,
 502                 struct mod_hdcp_transition_input_hdcp2 *input)
 503 {
 504         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 505
 506         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 507                 event_ctx->unexpected_event = 1;
 508                 goto out;
 509         }
 510
 511         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_eks,
 512                         &input->eks_prepare, &status,
 513                         hdcp, "eks_prepare"))
 514                 goto out;
 515         if (!mod_hdcp_execute_and_set(mod_hdcp_write_eks,
 516                         &input->eks_write, &status,
 517                         hdcp, "eks_write"))
 518                 goto out;
 519 out:
 520         return status;
 521 }
 522
 523 static enum mod_hdcp_status enable_encryption(struct mod_hdcp *hdcp,
 524                 struct mod_hdcp_event_context *event_ctx,
 525                 struct mod_hdcp_transition_input_hdcp2 *input)
 526 {
 527         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 528
 529         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 530                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
 531                 event_ctx->unexpected_event = 1;
 532                 goto out;
 533         }
 534         if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
 535                 process_rxstatus(hdcp, event_ctx, input, &status);
 536                 goto out;
 537         }
 538
 539         if (is_hdmi_dvi_sl_hdcp(hdcp)) {
 540                 if (!process_rxstatus(hdcp, event_ctx, input, &status))
 541                         goto out;
 542                 if (event_ctx->rx_id_list_ready)
 543                         goto out;
 544         }
 545         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_enable_encryption,
 546                         &input->enable_encryption, &status,
 547                         hdcp, "enable_encryption"))
 548                 goto out;
 549         if (is_dp_mst_hdcp(hdcp)) {
 550                 if (!mod_hdcp_execute_and_set(
 551                                 mod_hdcp_hdcp2_enable_dp_stream_encryption,
 552                                 &input->stream_encryption_dp, &status,
 553                                 hdcp, "stream_encryption_dp"))
 554                         goto out;
 555         }
 556 out:
 557         return status;
 558 }
 559
 560 static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp,
 561                 struct mod_hdcp_event_context *event_ctx,
 562                 struct mod_hdcp_transition_input_hdcp2 *input)
 563 {
 564         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 565
 566         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 567                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
 568                 event_ctx->unexpected_event = 1;
 569                 goto out;
 570         }
 571
 572         process_rxstatus(hdcp, event_ctx, input, &status);
 573 out:
 574         return status;
 575 }
 576
 577 static enum mod_hdcp_status wait_for_rx_id_list(struct mod_hdcp *hdcp,
 578                 struct mod_hdcp_event_context *event_ctx,
 579                 struct mod_hdcp_transition_input_hdcp2 *input)
 580 {
 581         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 582
 583         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 584                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
 585                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 586                 event_ctx->unexpected_event = 1;
 587                 goto out;
 588         }
 589
 590         if (!process_rxstatus(hdcp, event_ctx, input, &status))
 591                 goto out;
 592         if (!event_ctx->rx_id_list_ready) {
 593                 status = MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY;
 594                 goto out;
 595         }
 596 out:
 597         return status;
 598 }
 599
 600 static enum mod_hdcp_status verify_rx_id_list_and_send_ack(struct mod_hdcp *hdcp,
 601                 struct mod_hdcp_event_context *event_ctx,
 602                 struct mod_hdcp_transition_input_hdcp2 *input)
 603 {
 604         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 605
 606         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 607                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
 608                 event_ctx->unexpected_event = 1;
 609                 goto out;
 610         }
 611         if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
 612                 process_rxstatus(hdcp, event_ctx, input, &status);
 613                 goto out;
 614         }
 615
 616         if (!mod_hdcp_execute_and_set(mod_hdcp_read_rx_id_list,
 617                         &input->rx_id_list_read,
 618                         &status, hdcp, "receiver_id_list_read"))
 619                 goto out;
 620         if (!mod_hdcp_execute_and_set(check_device_count,
 621                         &input->device_count_check,
 622                         &status, hdcp, "device_count_check"))
 623                 goto out;
 624         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_rx_id_list,
 625                         &input->rx_id_list_validation,
 626                         &status, hdcp, "rx_id_list_validation"))
 627                 goto out;
 628         if (!mod_hdcp_execute_and_set(mod_hdcp_write_repeater_auth_ack,
 629                         &input->repeater_auth_ack_write,
 630                         &status, hdcp, "repeater_auth_ack_write"))
 631                 goto out;
 632 out:
 633         return status;
 634 }
 635
 636 static enum mod_hdcp_status send_stream_management(struct mod_hdcp *hdcp,
 637                 struct mod_hdcp_event_context *event_ctx,
 638                 struct mod_hdcp_transition_input_hdcp2 *input)
 639 {
 640         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 641
 642         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 643                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
 644                 event_ctx->unexpected_event = 1;
 645                 goto out;
 646         }
 647         if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
 648                 process_rxstatus(hdcp, event_ctx, input, &status);
 649                 goto out;
 650         }
 651
 652         if (is_hdmi_dvi_sl_hdcp(hdcp)) {
 653                 if (!process_rxstatus(hdcp, event_ctx, input, &status))
 654                         goto out;
 655                 if (event_ctx->rx_id_list_ready)
 656                         goto out;
 657         }
 658         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_stream_management,
 659                         &input->prepare_stream_manage,
 660                         &status, hdcp, "prepare_stream_manage"))
 661                 goto out;
 662
 663         if (!mod_hdcp_execute_and_set(mod_hdcp_write_stream_manage,
 664                         &input->stream_manage_write,
 665                         &status, hdcp, "stream_manage_write"))
 666                 goto out;
 667 out:
 668         return status;
 669 }
 670
 671 static enum mod_hdcp_status validate_stream_ready(struct mod_hdcp *hdcp,
 672                 struct mod_hdcp_event_context *event_ctx,
 673                 struct mod_hdcp_transition_input_hdcp2 *input)
 674 {
 675         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 676
 677         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 678                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
 679                         event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
 680                 event_ctx->unexpected_event = 1;
 681                 goto out;
 682         }
 683         if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
 684                 process_rxstatus(hdcp, event_ctx, input, &status);
 685                 goto out;
 686         }
 687
 688         if (is_hdmi_dvi_sl_hdcp(hdcp)) {
 689                 if (!process_rxstatus(hdcp, event_ctx, input, &status))
 690                         goto out;
 691                 if (event_ctx->rx_id_list_ready)
 692                         goto out;
 693         }
 694         if (is_hdmi_dvi_sl_hdcp(hdcp))
 695                 if (!mod_hdcp_execute_and_set(check_stream_ready_available,
 696                                 &input->stream_ready_available,
 697                                 &status, hdcp, "stream_ready_available"))
 698                         goto out;
 699         if (!mod_hdcp_execute_and_set(mod_hdcp_read_stream_ready,
 700                         &input->stream_ready_read,
 701                         &status, hdcp, "stream_ready_read"))
 702                 goto out;
 703         if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_stream_ready,
 704                         &input->stream_ready_validation,
 705                         &status, hdcp, "stream_ready_validation"))
 706                 goto out;
 707
 708 out:
 709         return status;
 710 }
 711
 712 static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp,
 713                 struct mod_hdcp_event_context *event_ctx,
 714                 struct mod_hdcp_transition_input_hdcp2 *input)
 715 {
 716         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 717
 718         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 719                 event_ctx->unexpected_event = 1;
 720                 goto out;
 721         }
 722
 723         if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxcaps,
 724                         &input->rx_caps_read_dp,
 725                         &status, hdcp, "rx_caps_read_dp"))
 726                 goto out;
 727         if (!mod_hdcp_execute_and_set(check_hdcp2_capable,
 728                         &input->hdcp2_capable_check, &status,
 729                         hdcp, "hdcp2_capable_check"))
 730                 goto out;
 731 out:
 732         return status;
 733 }
 734
 735 static enum mod_hdcp_status send_content_stream_type_dp(struct mod_hdcp *hdcp,
 736                 struct mod_hdcp_event_context *event_ctx,
 737                 struct mod_hdcp_transition_input_hdcp2 *input)
 738 {
 739         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 740
 741         if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
 742                         event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
 743                 event_ctx->unexpected_event = 1;
 744                 goto out;
 745         }
 746
 747         if (!process_rxstatus(hdcp, event_ctx, input, &status))
 748                 goto out;
 749         if (!mod_hdcp_execute_and_set(mod_hdcp_write_content_type,
 750                         &input->content_stream_type_write, &status,
 751                         hdcp, "content_stream_type_write"))
 752                 goto out;
 753 out:
 754         return status;
 755 }
 756
 757 enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp,
 758         struct mod_hdcp_event_context *event_ctx,
 759         struct mod_hdcp_transition_input_hdcp2 *input)
 760 {
 761         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 762
 763         switch (current_state(hdcp)) {
 764         case H2_A0_KNOWN_HDCP2_CAPABLE_RX:
 765                 status = known_hdcp2_capable_rx(hdcp, event_ctx, input);
 766                 break;
 767         case H2_A1_SEND_AKE_INIT:
 768                 status = send_ake_init(hdcp, event_ctx, input);
 769                 break;
 770         case H2_A1_VALIDATE_AKE_CERT:
 771                 status = validate_ake_cert(hdcp, event_ctx, input);
 772                 break;
 773         case H2_A1_SEND_NO_STORED_KM:
 774                 status = send_no_stored_km(hdcp, event_ctx, input);
 775                 break;
 776         case H2_A1_READ_H_PRIME:
 777                 status = read_h_prime(hdcp, event_ctx, input);
 778                 break;
 779         case H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
 780                 status = read_pairing_info_and_validate_h_prime(hdcp,
 781                                 event_ctx, input);
 782                 break;
 783         case H2_A1_SEND_STORED_KM:
 784                 status = send_stored_km(hdcp, event_ctx, input);
 785                 break;
 786         case H2_A1_VALIDATE_H_PRIME:
 787                 status = validate_h_prime(hdcp, event_ctx, input);
 788                 break;
 789         case H2_A2_LOCALITY_CHECK:
 790                 status = locality_check(hdcp, event_ctx, input);
 791                 break;
 792         case H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
 793                 status = exchange_ks_and_test_for_repeater(hdcp, event_ctx, input);
 794                 break;
 795         case H2_ENABLE_ENCRYPTION:
 796                 status = enable_encryption(hdcp, event_ctx, input);
 797                 break;
 798         case H2_A5_AUTHENTICATED:
 799                 status = authenticated(hdcp, event_ctx, input);
 800                 break;
 801         case H2_A6_WAIT_FOR_RX_ID_LIST:
 802                 status = wait_for_rx_id_list(hdcp, event_ctx, input);
 803                 break;
 804         case H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
 805                 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input);
 806                 break;
 807         case H2_A9_SEND_STREAM_MANAGEMENT:
 808                 status = send_stream_management(hdcp, event_ctx, input);
 809                 break;
 810         case H2_A9_VALIDATE_STREAM_READY:
 811                 status = validate_stream_ready(hdcp, event_ctx, input);
 812                 break;
 813         default:
 814                 status = MOD_HDCP_STATUS_INVALID_STATE;
 815                 break;
 816         }
 817
 818         return status;
 819 }
 820
 821 enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp,
 822         struct mod_hdcp_event_context *event_ctx,
 823         struct mod_hdcp_transition_input_hdcp2 *input)
 824 {
 825         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 826
 827         switch (current_state(hdcp)) {
 828         case D2_A0_DETERMINE_RX_HDCP_CAPABLE:
 829                 status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input);
 830                 break;
 831         case D2_A1_SEND_AKE_INIT:
 832                 status = send_ake_init(hdcp, event_ctx, input);
 833                 break;
 834         case D2_A1_VALIDATE_AKE_CERT:
 835                 status = validate_ake_cert(hdcp, event_ctx, input);
 836                 break;
 837         case D2_A1_SEND_NO_STORED_KM:
 838                 status = send_no_stored_km(hdcp, event_ctx, input);
 839                 break;
 840         case D2_A1_READ_H_PRIME:
 841                 status = read_h_prime(hdcp, event_ctx, input);
 842                 break;
 843         case D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
 844                 status = read_pairing_info_and_validate_h_prime(hdcp,
 845                                 event_ctx, input);
 846                 break;
 847         case D2_A1_SEND_STORED_KM:
 848                 status = send_stored_km(hdcp, event_ctx, input);
 849                 break;
 850         case D2_A1_VALIDATE_H_PRIME:
 851                 status = validate_h_prime(hdcp, event_ctx, input);
 852                 break;
 853         case D2_A2_LOCALITY_CHECK:
 854                 status = locality_check(hdcp, event_ctx, input);
 855                 break;
 856         case D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
 857                 status = exchange_ks_and_test_for_repeater(hdcp,
 858                                 event_ctx, input);
 859                 break;
 860         case D2_SEND_CONTENT_STREAM_TYPE:
 861                 status = send_content_stream_type_dp(hdcp, event_ctx, input);
 862                 break;
 863         case D2_ENABLE_ENCRYPTION:
 864                 status = enable_encryption(hdcp, event_ctx, input);
 865                 break;
 866         case D2_A5_AUTHENTICATED:
 867                 status = authenticated(hdcp, event_ctx, input);
 868                 break;
 869         case D2_A6_WAIT_FOR_RX_ID_LIST:
 870                 status = wait_for_rx_id_list(hdcp, event_ctx, input);
 871                 break;
 872         case D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
 873                 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input);
 874                 break;
 875         case D2_A9_SEND_STREAM_MANAGEMENT:
 876                 status = send_stream_management(hdcp, event_ctx, input);
 877                 break;
 878         case D2_A9_VALIDATE_STREAM_READY:
 879                 status = validate_stream_ready(hdcp, event_ctx, input);
 880                 break;
 881         default:
 882                 status = MOD_HDCP_STATUS_INVALID_STATE;
 883                 break;
 884         }
 885
 886         return status;
 887 }