| 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 void push_error_status(struct mod_hdcp *hdcp, |
| 29 | enum mod_hdcp_status status) |
| 30 | { |
| 31 | struct mod_hdcp_trace *trace = &hdcp->connection.trace; |
| 32 | |
| 33 | if (trace->error_count < MAX_NUM_OF_ERROR_TRACE) { |
| 34 | trace->errors[trace->error_count].status = status; |
| 35 | trace->errors[trace->error_count].state_id = hdcp->state.id; |
| 36 | trace->error_count++; |
| 37 | HDCP_ERROR_TRACE(hdcp, status); |
| 38 | } |
| 39 | |
| 40 | if (is_hdcp1(hdcp)) { |
| 41 | hdcp->connection.hdcp1_retry_count++; |
| 42 | if (hdcp->connection.hdcp1_retry_count == MAX_NUM_OF_ATTEMPTS) |
| 43 | hdcp->connection.link.adjust.hdcp1.disable = 1; |
| 44 | } else if (is_hdcp2(hdcp)) { |
| 45 | hdcp->connection.hdcp2_retry_count++; |
| 46 | if (hdcp->connection.hdcp2_retry_count == MAX_NUM_OF_ATTEMPTS) |
| 47 | hdcp->connection.link.adjust.hdcp2.disable = 1; |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | static uint8_t is_cp_desired_hdcp1(struct mod_hdcp *hdcp) |
| 52 | { |
| 53 | int i, is_auth_needed = 0; |
| 54 | |
| 55 | /* if all displays on the link don't need authentication, |
| 56 | * hdcp is not desired |
| 57 | */ |
| 58 | for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) { |
| 59 | if (hdcp->displays[i].state != MOD_HDCP_DISPLAY_INACTIVE && |
| 60 | hdcp->displays[i].adjust.disable != MOD_HDCP_DISPLAY_DISABLE_AUTHENTICATION) { |
| 61 | is_auth_needed = 1; |
| 62 | break; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | return is_auth_needed && |
| 67 | !hdcp->connection.link.adjust.hdcp1.disable && |
| 68 | !hdcp->connection.is_hdcp1_revoked; |
| 69 | } |
| 70 | |
| 71 | static uint8_t is_cp_desired_hdcp2(struct mod_hdcp *hdcp) |
| 72 | { |
| 73 | int i, is_auth_needed = 0; |
| 74 | |
| 75 | /* if all displays on the link don't need authentication, |
| 76 | * hdcp is not desired |
| 77 | */ |
| 78 | for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) { |
| 79 | if (hdcp->displays[i].state != MOD_HDCP_DISPLAY_INACTIVE && |
| 80 | hdcp->displays[i].adjust.disable != MOD_HDCP_DISPLAY_DISABLE_AUTHENTICATION) { |
| 81 | is_auth_needed = 1; |
| 82 | break; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | return is_auth_needed && |
| 87 | !hdcp->connection.link.adjust.hdcp2.disable && |
| 88 | !hdcp->connection.is_hdcp2_revoked; |
| 89 | } |
| 90 | |
| 91 | static enum mod_hdcp_status execution(struct mod_hdcp *hdcp, |
| 92 | struct mod_hdcp_event_context *event_ctx, |
| 93 | union mod_hdcp_transition_input *input) |
| 94 | { |
| 95 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 96 | |
| 97 | if (is_in_initialized_state(hdcp)) { |
| 98 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| 99 | event_ctx->unexpected_event = 1; |
| 100 | goto out; |
| 101 | } |
| 102 | /* initialize transition input */ |
| 103 | memset(input, 0, sizeof(union mod_hdcp_transition_input)); |
| 104 | } else if (is_in_cp_not_desired_state(hdcp)) { |
| 105 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| 106 | event_ctx->unexpected_event = 1; |
| 107 | goto out; |
| 108 | } |
| 109 | } else if (is_in_hdcp1_states(hdcp)) { |
| 110 | status = mod_hdcp_hdcp1_execution(hdcp, event_ctx, &input->hdcp1); |
| 111 | } else if (is_in_hdcp1_dp_states(hdcp)) { |
| 112 | status = mod_hdcp_hdcp1_dp_execution(hdcp, |
| 113 | event_ctx, &input->hdcp1); |
| 114 | } else if (is_in_hdcp2_states(hdcp)) { |
| 115 | status = mod_hdcp_hdcp2_execution(hdcp, event_ctx, &input->hdcp2); |
| 116 | } else if (is_in_hdcp2_dp_states(hdcp)) { |
| 117 | status = mod_hdcp_hdcp2_dp_execution(hdcp, |
| 118 | event_ctx, &input->hdcp2); |
| 119 | } else { |
| 120 | event_ctx->unexpected_event = 1; |
| 121 | goto out; |
| 122 | } |
| 123 | out: |
| 124 | return status; |
| 125 | } |
| 126 | |
| 127 | static enum mod_hdcp_status transition(struct mod_hdcp *hdcp, |
| 128 | struct mod_hdcp_event_context *event_ctx, |
| 129 | union mod_hdcp_transition_input *input, |
| 130 | struct mod_hdcp_output *output) |
| 131 | { |
| 132 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 133 | |
| 134 | if (event_ctx->unexpected_event) |
| 135 | goto out; |
| 136 | |
| 137 | if (is_in_initialized_state(hdcp)) { |
| 138 | if (is_dp_hdcp(hdcp)) |
| 139 | if (is_cp_desired_hdcp2(hdcp)) { |
| 140 | callback_in_ms(0, output); |
| 141 | set_state_id(hdcp, output, D2_A0_DETERMINE_RX_HDCP_CAPABLE); |
| 142 | } else if (is_cp_desired_hdcp1(hdcp)) { |
| 143 | callback_in_ms(0, output); |
| 144 | set_state_id(hdcp, output, D1_A0_DETERMINE_RX_HDCP_CAPABLE); |
| 145 | } else { |
| 146 | callback_in_ms(0, output); |
| 147 | set_state_id(hdcp, output, HDCP_CP_NOT_DESIRED); |
| 148 | set_auth_complete(hdcp, output); |
| 149 | } |
| 150 | else if (is_hdmi_dvi_sl_hdcp(hdcp)) |
| 151 | if (is_cp_desired_hdcp2(hdcp)) { |
| 152 | callback_in_ms(0, output); |
| 153 | set_state_id(hdcp, output, H2_A0_KNOWN_HDCP2_CAPABLE_RX); |
| 154 | } else if (is_cp_desired_hdcp1(hdcp)) { |
| 155 | callback_in_ms(0, output); |
| 156 | set_state_id(hdcp, output, H1_A0_WAIT_FOR_ACTIVE_RX); |
| 157 | } else { |
| 158 | callback_in_ms(0, output); |
| 159 | set_state_id(hdcp, output, HDCP_CP_NOT_DESIRED); |
| 160 | set_auth_complete(hdcp, output); |
| 161 | } |
| 162 | else { |
| 163 | callback_in_ms(0, output); |
| 164 | set_state_id(hdcp, output, HDCP_CP_NOT_DESIRED); |
| 165 | set_auth_complete(hdcp, output); |
| 166 | } |
| 167 | } else if (is_in_cp_not_desired_state(hdcp)) { |
| 168 | increment_stay_counter(hdcp); |
| 169 | } else if (is_in_hdcp1_states(hdcp)) { |
| 170 | status = mod_hdcp_hdcp1_transition(hdcp, |
| 171 | event_ctx, &input->hdcp1, output); |
| 172 | } else if (is_in_hdcp1_dp_states(hdcp)) { |
| 173 | status = mod_hdcp_hdcp1_dp_transition(hdcp, |
| 174 | event_ctx, &input->hdcp1, output); |
| 175 | } else if (is_in_hdcp2_states(hdcp)) { |
| 176 | status = mod_hdcp_hdcp2_transition(hdcp, |
| 177 | event_ctx, &input->hdcp2, output); |
| 178 | } else if (is_in_hdcp2_dp_states(hdcp)) { |
| 179 | status = mod_hdcp_hdcp2_dp_transition(hdcp, |
| 180 | event_ctx, &input->hdcp2, output); |
| 181 | } else { |
| 182 | status = MOD_HDCP_STATUS_INVALID_STATE; |
| 183 | } |
| 184 | out: |
| 185 | return status; |
| 186 | } |
| 187 | |
| 188 | static enum mod_hdcp_status reset_authentication(struct mod_hdcp *hdcp, |
| 189 | struct mod_hdcp_output *output) |
| 190 | { |
| 191 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 192 | |
| 193 | if (is_hdcp1(hdcp)) { |
| 194 | if (hdcp->auth.trans_input.hdcp1.create_session != UNKNOWN) { |
| 195 | /* TODO - update psp to unify create session failure |
| 196 | * recovery between hdcp1 and 2. |
| 197 | */ |
| 198 | mod_hdcp_hdcp1_destroy_session(hdcp); |
| 199 | |
| 200 | } |
| 201 | |
| 202 | HDCP_TOP_RESET_AUTH_TRACE(hdcp); |
| 203 | memset(&hdcp->auth, 0, sizeof(struct mod_hdcp_authentication)); |
| 204 | memset(&hdcp->state, 0, sizeof(struct mod_hdcp_state)); |
| 205 | set_state_id(hdcp, output, HDCP_INITIALIZED); |
| 206 | } else if (is_hdcp2(hdcp)) { |
| 207 | if (hdcp->auth.trans_input.hdcp2.create_session == PASS) { |
| 208 | status = mod_hdcp_hdcp2_destroy_session(hdcp); |
| 209 | if (status != MOD_HDCP_STATUS_SUCCESS) { |
| 210 | output->callback_needed = 0; |
| 211 | output->watchdog_timer_needed = 0; |
| 212 | goto out; |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | HDCP_TOP_RESET_AUTH_TRACE(hdcp); |
| 217 | memset(&hdcp->auth, 0, sizeof(struct mod_hdcp_authentication)); |
| 218 | memset(&hdcp->state, 0, sizeof(struct mod_hdcp_state)); |
| 219 | set_state_id(hdcp, output, HDCP_INITIALIZED); |
| 220 | } else if (is_in_cp_not_desired_state(hdcp)) { |
| 221 | HDCP_TOP_RESET_AUTH_TRACE(hdcp); |
| 222 | memset(&hdcp->auth, 0, sizeof(struct mod_hdcp_authentication)); |
| 223 | memset(&hdcp->state, 0, sizeof(struct mod_hdcp_state)); |
| 224 | set_state_id(hdcp, output, HDCP_INITIALIZED); |
| 225 | } |
| 226 | |
| 227 | out: |
| 228 | /* stop callback and watchdog requests from previous authentication*/ |
| 229 | output->watchdog_timer_stop = 1; |
| 230 | output->callback_stop = 1; |
| 231 | return status; |
| 232 | } |
| 233 | |
| 234 | static enum mod_hdcp_status reset_connection(struct mod_hdcp *hdcp, |
| 235 | struct mod_hdcp_output *output) |
| 236 | { |
| 237 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 238 | |
| 239 | memset(output, 0, sizeof(struct mod_hdcp_output)); |
| 240 | |
| 241 | status = reset_authentication(hdcp, output); |
| 242 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 243 | goto out; |
| 244 | |
| 245 | if (current_state(hdcp) != HDCP_UNINITIALIZED) { |
| 246 | HDCP_TOP_RESET_CONN_TRACE(hdcp); |
| 247 | set_state_id(hdcp, output, HDCP_UNINITIALIZED); |
| 248 | } |
| 249 | memset(&hdcp->connection, 0, sizeof(hdcp->connection)); |
| 250 | out: |
| 251 | return status; |
| 252 | } |
| 253 | |
| 254 | static enum mod_hdcp_status update_display_adjustments(struct mod_hdcp *hdcp, |
| 255 | struct mod_hdcp_display *display, |
| 256 | struct mod_hdcp_display_adjustment *adj) |
| 257 | { |
| 258 | enum mod_hdcp_status status = MOD_HDCP_STATUS_NOT_IMPLEMENTED; |
| 259 | |
| 260 | if (is_in_authenticated_states(hdcp) && |
| 261 | is_dp_mst_hdcp(hdcp) && |
| 262 | display->adjust.disable == true && |
| 263 | adj->disable == false) { |
| 264 | display->adjust.disable = false; |
| 265 | if (is_hdcp1(hdcp)) |
| 266 | status = mod_hdcp_hdcp1_enable_dp_stream_encryption(hdcp); |
| 267 | else if (is_hdcp2(hdcp)) |
| 268 | status = mod_hdcp_hdcp2_enable_dp_stream_encryption(hdcp); |
| 269 | |
| 270 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 271 | display->adjust.disable = true; |
| 272 | } |
| 273 | |
| 274 | if (status == MOD_HDCP_STATUS_SUCCESS && |
| 275 | memcmp(adj, &display->adjust, |
| 276 | sizeof(struct mod_hdcp_display_adjustment)) != 0) |
| 277 | status = MOD_HDCP_STATUS_NOT_IMPLEMENTED; |
| 278 | |
| 279 | return status; |
| 280 | } |
| 281 | /* |
| 282 | * Implementation of functions in mod_hdcp.h |
| 283 | */ |
| 284 | size_t mod_hdcp_get_memory_size(void) |
| 285 | { |
| 286 | return sizeof(struct mod_hdcp); |
| 287 | } |
| 288 | |
| 289 | enum mod_hdcp_status mod_hdcp_setup(struct mod_hdcp *hdcp, |
| 290 | struct mod_hdcp_config *config) |
| 291 | { |
| 292 | struct mod_hdcp_output output; |
| 293 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 294 | |
| 295 | memset(&output, 0, sizeof(output)); |
| 296 | hdcp->config = *config; |
| 297 | HDCP_TOP_INTERFACE_TRACE(hdcp); |
| 298 | status = reset_connection(hdcp, &output); |
| 299 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 300 | push_error_status(hdcp, status); |
| 301 | return status; |
| 302 | } |
| 303 | |
| 304 | enum mod_hdcp_status mod_hdcp_teardown(struct mod_hdcp *hdcp) |
| 305 | { |
| 306 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 307 | struct mod_hdcp_output output; |
| 308 | |
| 309 | HDCP_TOP_INTERFACE_TRACE(hdcp); |
| 310 | memset(&output, 0, sizeof(output)); |
| 311 | status = reset_connection(hdcp, &output); |
| 312 | if (status == MOD_HDCP_STATUS_SUCCESS) |
| 313 | memset(hdcp, 0, sizeof(struct mod_hdcp)); |
| 314 | else |
| 315 | push_error_status(hdcp, status); |
| 316 | return status; |
| 317 | } |
| 318 | |
| 319 | enum mod_hdcp_status mod_hdcp_add_display(struct mod_hdcp *hdcp, |
| 320 | struct mod_hdcp_link *link, struct mod_hdcp_display *display, |
| 321 | struct mod_hdcp_output *output) |
| 322 | { |
| 323 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 324 | struct mod_hdcp_display *display_container = NULL; |
| 325 | |
| 326 | HDCP_TOP_INTERFACE_TRACE_WITH_INDEX(hdcp, display->index); |
| 327 | memset(output, 0, sizeof(struct mod_hdcp_output)); |
| 328 | |
| 329 | /* skip inactive display */ |
| 330 | if (display->state != MOD_HDCP_DISPLAY_ACTIVE) { |
| 331 | status = MOD_HDCP_STATUS_SUCCESS; |
| 332 | goto out; |
| 333 | } |
| 334 | |
| 335 | /* check existing display container */ |
| 336 | if (get_active_display_at_index(hdcp, display->index)) { |
| 337 | status = MOD_HDCP_STATUS_SUCCESS; |
| 338 | goto out; |
| 339 | } |
| 340 | |
| 341 | /* find an empty display container */ |
| 342 | display_container = get_empty_display_container(hdcp); |
| 343 | if (!display_container) { |
| 344 | status = MOD_HDCP_STATUS_DISPLAY_OUT_OF_BOUND; |
| 345 | goto out; |
| 346 | } |
| 347 | |
| 348 | /* reset existing authentication status */ |
| 349 | status = reset_authentication(hdcp, output); |
| 350 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 351 | goto out; |
| 352 | |
| 353 | /* reset retry counters */ |
| 354 | reset_retry_counts(hdcp); |
| 355 | |
| 356 | /* reset error trace */ |
| 357 | memset(&hdcp->connection.trace, 0, sizeof(hdcp->connection.trace)); |
| 358 | |
| 359 | /* add display to connection */ |
| 360 | hdcp->connection.link = *link; |
| 361 | *display_container = *display; |
| 362 | status = mod_hdcp_add_display_to_topology(hdcp, display_container); |
| 363 | |
| 364 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 365 | goto out; |
| 366 | |
| 367 | /* request authentication */ |
| 368 | if (current_state(hdcp) != HDCP_INITIALIZED) |
| 369 | set_state_id(hdcp, output, HDCP_INITIALIZED); |
| 370 | callback_in_ms(hdcp->connection.link.adjust.auth_delay * 1000, output); |
| 371 | out: |
| 372 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 373 | push_error_status(hdcp, status); |
| 374 | |
| 375 | return status; |
| 376 | } |
| 377 | |
| 378 | enum mod_hdcp_status mod_hdcp_remove_display(struct mod_hdcp *hdcp, |
| 379 | uint8_t index, struct mod_hdcp_output *output) |
| 380 | { |
| 381 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 382 | struct mod_hdcp_display *display = NULL; |
| 383 | |
| 384 | HDCP_TOP_INTERFACE_TRACE_WITH_INDEX(hdcp, index); |
| 385 | memset(output, 0, sizeof(struct mod_hdcp_output)); |
| 386 | |
| 387 | /* find display in connection */ |
| 388 | display = get_active_display_at_index(hdcp, index); |
| 389 | if (!display) { |
| 390 | status = MOD_HDCP_STATUS_SUCCESS; |
| 391 | goto out; |
| 392 | } |
| 393 | |
| 394 | /* stop current authentication */ |
| 395 | status = reset_authentication(hdcp, output); |
| 396 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 397 | goto out; |
| 398 | |
| 399 | /* clear retry counters */ |
| 400 | reset_retry_counts(hdcp); |
| 401 | |
| 402 | /* reset error trace */ |
| 403 | memset(&hdcp->connection.trace, 0, sizeof(hdcp->connection.trace)); |
| 404 | |
| 405 | /* remove display */ |
| 406 | status = mod_hdcp_remove_display_from_topology(hdcp, index); |
| 407 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 408 | goto out; |
| 409 | memset(display, 0, sizeof(struct mod_hdcp_display)); |
| 410 | |
| 411 | /* request authentication when connection is not reset */ |
| 412 | if (current_state(hdcp) != HDCP_UNINITIALIZED) |
| 413 | callback_in_ms(hdcp->connection.link.adjust.auth_delay * 1000, |
| 414 | output); |
| 415 | out: |
| 416 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 417 | push_error_status(hdcp, status); |
| 418 | return status; |
| 419 | } |
| 420 | |
| 421 | enum mod_hdcp_status mod_hdcp_update_display(struct mod_hdcp *hdcp, |
| 422 | uint8_t index, |
| 423 | struct mod_hdcp_link_adjustment *link_adjust, |
| 424 | struct mod_hdcp_display_adjustment *display_adjust, |
| 425 | struct mod_hdcp_output *output) |
| 426 | { |
| 427 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 428 | struct mod_hdcp_display *display = NULL; |
| 429 | |
| 430 | HDCP_TOP_INTERFACE_TRACE_WITH_INDEX(hdcp, index); |
| 431 | memset(output, 0, sizeof(struct mod_hdcp_output)); |
| 432 | |
| 433 | /* find display in connection */ |
| 434 | display = get_active_display_at_index(hdcp, index); |
| 435 | if (!display) { |
| 436 | status = MOD_HDCP_STATUS_DISPLAY_NOT_FOUND; |
| 437 | goto out; |
| 438 | } |
| 439 | |
| 440 | /* skip if no changes */ |
| 441 | if (memcmp(link_adjust, &hdcp->connection.link.adjust, |
| 442 | sizeof(struct mod_hdcp_link_adjustment)) == 0 && |
| 443 | memcmp(display_adjust, &display->adjust, |
| 444 | sizeof(struct mod_hdcp_display_adjustment)) == 0) { |
| 445 | status = MOD_HDCP_STATUS_SUCCESS; |
| 446 | goto out; |
| 447 | } |
| 448 | |
| 449 | if (memcmp(link_adjust, &hdcp->connection.link.adjust, |
| 450 | sizeof(struct mod_hdcp_link_adjustment)) == 0 && |
| 451 | memcmp(display_adjust, &display->adjust, |
| 452 | sizeof(struct mod_hdcp_display_adjustment)) != 0) { |
| 453 | status = update_display_adjustments(hdcp, display, display_adjust); |
| 454 | if (status != MOD_HDCP_STATUS_NOT_IMPLEMENTED) |
| 455 | goto out; |
| 456 | } |
| 457 | |
| 458 | /* stop current authentication */ |
| 459 | status = reset_authentication(hdcp, output); |
| 460 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 461 | goto out; |
| 462 | |
| 463 | /* clear retry counters */ |
| 464 | reset_retry_counts(hdcp); |
| 465 | |
| 466 | /* reset error trace */ |
| 467 | memset(&hdcp->connection.trace, 0, sizeof(hdcp->connection.trace)); |
| 468 | |
| 469 | /* set new adjustment */ |
| 470 | hdcp->connection.link.adjust = *link_adjust; |
| 471 | display->adjust = *display_adjust; |
| 472 | |
| 473 | /* request authentication when connection is not reset */ |
| 474 | if (current_state(hdcp) != HDCP_UNINITIALIZED) |
| 475 | /* wait 100ms to debounce simultaneous updates for different indices */ |
| 476 | callback_in_ms(100, output); |
| 477 | |
| 478 | out: |
| 479 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 480 | push_error_status(hdcp, status); |
| 481 | return status; |
| 482 | } |
| 483 | |
| 484 | enum mod_hdcp_status mod_hdcp_query_display(struct mod_hdcp *hdcp, |
| 485 | uint8_t index, struct mod_hdcp_display_query *query) |
| 486 | { |
| 487 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 488 | struct mod_hdcp_display *display = NULL; |
| 489 | |
| 490 | /* find display in connection */ |
| 491 | display = get_active_display_at_index(hdcp, index); |
| 492 | if (!display) { |
| 493 | status = MOD_HDCP_STATUS_DISPLAY_NOT_FOUND; |
| 494 | goto out; |
| 495 | } |
| 496 | |
| 497 | /* populate query */ |
| 498 | query->link = &hdcp->connection.link; |
| 499 | query->display = display; |
| 500 | query->trace = &hdcp->connection.trace; |
| 501 | query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF; |
| 502 | |
| 503 | if (is_display_encryption_enabled(display)) { |
| 504 | if (is_hdcp1(hdcp)) { |
| 505 | query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP1_ON; |
| 506 | } else if (is_hdcp2(hdcp)) { |
| 507 | if (query->link->adjust.hdcp2.force_type == MOD_HDCP_FORCE_TYPE_0) |
| 508 | query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE0_ON; |
| 509 | else if (query->link->adjust.hdcp2.force_type == MOD_HDCP_FORCE_TYPE_1) |
| 510 | query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE1_ON; |
| 511 | else |
| 512 | query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP2_ON; |
| 513 | } |
| 514 | } else { |
| 515 | query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF; |
| 516 | } |
| 517 | |
| 518 | out: |
| 519 | return status; |
| 520 | } |
| 521 | |
| 522 | enum mod_hdcp_status mod_hdcp_reset_connection(struct mod_hdcp *hdcp, |
| 523 | struct mod_hdcp_output *output) |
| 524 | { |
| 525 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 526 | |
| 527 | HDCP_TOP_INTERFACE_TRACE(hdcp); |
| 528 | status = reset_connection(hdcp, output); |
| 529 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 530 | push_error_status(hdcp, status); |
| 531 | |
| 532 | return status; |
| 533 | } |
| 534 | |
| 535 | enum mod_hdcp_status mod_hdcp_process_event(struct mod_hdcp *hdcp, |
| 536 | enum mod_hdcp_event event, struct mod_hdcp_output *output) |
| 537 | { |
| 538 | enum mod_hdcp_status exec_status, trans_status, reset_status, status; |
| 539 | struct mod_hdcp_event_context event_ctx; |
| 540 | |
| 541 | HDCP_EVENT_TRACE(hdcp, event); |
| 542 | memset(output, 0, sizeof(struct mod_hdcp_output)); |
| 543 | memset(&event_ctx, 0, sizeof(struct mod_hdcp_event_context)); |
| 544 | event_ctx.event = event; |
| 545 | |
| 546 | /* execute and transition */ |
| 547 | exec_status = execution(hdcp, &event_ctx, &hdcp->auth.trans_input); |
| 548 | trans_status = transition( |
| 549 | hdcp, &event_ctx, &hdcp->auth.trans_input, output); |
| 550 | if (trans_status == MOD_HDCP_STATUS_SUCCESS) { |
| 551 | status = MOD_HDCP_STATUS_SUCCESS; |
| 552 | } else if (exec_status == MOD_HDCP_STATUS_SUCCESS) { |
| 553 | status = MOD_HDCP_STATUS_INTERNAL_POLICY_FAILURE; |
| 554 | push_error_status(hdcp, status); |
| 555 | } else { |
| 556 | status = exec_status; |
| 557 | push_error_status(hdcp, status); |
| 558 | } |
| 559 | |
| 560 | /* reset authentication if needed */ |
| 561 | if (trans_status == MOD_HDCP_STATUS_RESET_NEEDED) { |
| 562 | mod_hdcp_log_ddc_trace(hdcp); |
| 563 | reset_status = reset_authentication(hdcp, output); |
| 564 | if (reset_status != MOD_HDCP_STATUS_SUCCESS) |
| 565 | push_error_status(hdcp, reset_status); |
| 566 | } |
| 567 | |
| 568 | /* Clear CP_IRQ status if needed */ |
| 569 | if (event_ctx.event == MOD_HDCP_EVENT_CPIRQ) { |
| 570 | status = mod_hdcp_clear_cp_irq_status(hdcp); |
| 571 | if (status != MOD_HDCP_STATUS_SUCCESS) |
| 572 | push_error_status(hdcp, status); |
| 573 | } |
| 574 | |
| 575 | return status; |
| 576 | } |
| 577 | |
| 578 | enum mod_hdcp_operation_mode mod_hdcp_signal_type_to_operation_mode( |
| 579 | enum signal_type signal) |
| 580 | { |
| 581 | enum mod_hdcp_operation_mode mode = MOD_HDCP_MODE_OFF; |
| 582 | |
| 583 | switch (signal) { |
| 584 | case SIGNAL_TYPE_DVI_SINGLE_LINK: |
| 585 | case SIGNAL_TYPE_HDMI_TYPE_A: |
| 586 | mode = MOD_HDCP_MODE_DEFAULT; |
| 587 | break; |
| 588 | case SIGNAL_TYPE_EDP: |
| 589 | case SIGNAL_TYPE_DISPLAY_PORT: |
| 590 | case SIGNAL_TYPE_DISPLAY_PORT_MST: |
| 591 | mode = MOD_HDCP_MODE_DP; |
| 592 | break; |
| 593 | default: |
| 594 | break; |
| 595 | } |
| 596 | |
| 597 | return mode; |
| 598 | } |