diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c new file mode 100644 index 000000000000..76edcbe51f71 --- /dev/null +++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c @@ -0,0 +1,319 @@ +/* + * Copyright 2019 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +#include "hdcp.h" + +enum mod_hdcp_status mod_hdcp_hdcp1_transition(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *input, + struct mod_hdcp_output *output) +{ + enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; + struct mod_hdcp_connection *conn = &hdcp->connection; + struct mod_hdcp_link_adjustment *adjust = &hdcp->connection.link.adjust; + + switch (current_state(hdcp)) { + case H1_A0_WAIT_FOR_ACTIVE_RX: + if (input->bksv_read != PASS || input->bcaps_read != PASS) { + /* 1A-04: repeatedly attempts on port access failure */ + callback_in_ms(500, output); + increment_stay_counter(hdcp); + break; + } + callback_in_ms(0, output); + set_state_id(hdcp, output, H1_A1_EXCHANGE_KSVS); + break; + case H1_A1_EXCHANGE_KSVS: + if (input->add_topology != PASS || + input->create_session != PASS) { + /* out of sync with psp state */ + adjust->hdcp1.disable = 1; + fail_and_restart_in_ms(0, &status, output); + break; + } else if (input->an_write != PASS || + input->aksv_write != PASS || + input->bksv_read != PASS || + input->bksv_validation != PASS || + input->ainfo_write == FAIL) { + /* 1A-05: consider invalid bksv a failure */ + fail_and_restart_in_ms(0, &status, output); + break; + } + callback_in_ms(300, output); + set_state_id(hdcp, output, + H1_A2_COMPUTATIONS_A3_VALIDATE_RX_A6_TEST_FOR_REPEATER); + break; + case H1_A2_COMPUTATIONS_A3_VALIDATE_RX_A6_TEST_FOR_REPEATER: + if (input->bcaps_read != PASS || + input->r0p_read != PASS) { + fail_and_restart_in_ms(0, &status, output); + break; + } else if (input->rx_validation != PASS) { + /* 1A-06: consider invalid r0' a failure */ + /* 1A-08: consider bksv listed in SRM a failure */ + /* + * some slow RX will fail rx validation when it is + * not ready. give it more time to react before retry. + */ + fail_and_restart_in_ms(1000, &status, output); + break; + } else if (!conn->is_repeater && input->encryption != PASS) { + fail_and_restart_in_ms(0, &status, output); + break; + } + if (conn->is_repeater) { + callback_in_ms(0, output); + set_watchdog_in_ms(hdcp, 5000, output); + set_state_id(hdcp, output, H1_A8_WAIT_FOR_READY); + } else { + callback_in_ms(0, output); + set_state_id(hdcp, output, H1_A45_AUTHENTICATED); + HDCP_FULL_DDC_TRACE(hdcp); + } + break; + case H1_A45_AUTHENTICATED: + if (input->link_maintenance != PASS) { + /* 1A-07: consider invalid ri' a failure */ + /* 1A-07a: consider read ri' not returned a failure */ + fail_and_restart_in_ms(0, &status, output); + break; + } + callback_in_ms(500, output); + increment_stay_counter(hdcp); + break; + case H1_A8_WAIT_FOR_READY: + if (input->ready_check != PASS) { + if (event_ctx->event == + MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { + /* 1B-03: fail hdcp on ksv list READY timeout */ + /* prevent black screen in next attempt */ + adjust->hdcp1.postpone_encryption = 1; + fail_and_restart_in_ms(0, &status, output); + } else { + /* continue ksv list READY polling*/ + callback_in_ms(500, output); + increment_stay_counter(hdcp); + } + break; + } + callback_in_ms(0, output); + set_state_id(hdcp, output, H1_A9_READ_KSV_LIST); + break; + case H1_A9_READ_KSV_LIST: + if (input->bstatus_read != PASS || + input->max_cascade_check != PASS || + input->max_devs_check != PASS || + input->device_count_check != PASS || + input->ksvlist_read != PASS || + input->vp_read != PASS || + input->ksvlist_vp_validation != PASS || + input->encryption != PASS) { + /* 1B-06: consider MAX_CASCADE_EXCEEDED a failure */ + /* 1B-05: consider MAX_DEVS_EXCEEDED a failure */ + /* 1B-04: consider invalid v' a failure */ + fail_and_restart_in_ms(0, &status, output); + break; + } + callback_in_ms(0, output); + set_state_id(hdcp, output, H1_A45_AUTHENTICATED); + HDCP_FULL_DDC_TRACE(hdcp); + break; + default: + status = MOD_HDCP_STATUS_INVALID_STATE; + fail_and_restart_in_ms(0, &status, output); + break; + } + + return status; +} + +enum mod_hdcp_status mod_hdcp_hdcp1_dp_transition(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *input, + struct mod_hdcp_output *output) +{ + enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; + struct mod_hdcp_connection *conn = &hdcp->connection; + struct mod_hdcp_link_adjustment *adjust = &hdcp->connection.link.adjust; + + switch (current_state(hdcp)) { + case D1_A0_DETERMINE_RX_HDCP_CAPABLE: + if (input->bcaps_read != PASS) { + /* 1A-04: no authentication on bcaps read failure */ + fail_and_restart_in_ms(0, &status, output); + break; + } else if (input->hdcp_capable_dp != PASS) { + adjust->hdcp1.disable = 1; + fail_and_restart_in_ms(0, &status, output); + break; + } + callback_in_ms(0, output); + set_state_id(hdcp, output, D1_A1_EXCHANGE_KSVS); + break; + case D1_A1_EXCHANGE_KSVS: + if (input->add_topology != PASS || + input->create_session != PASS) { + /* out of sync with psp state */ + adjust->hdcp1.disable = 1; + fail_and_restart_in_ms(0, &status, output); + break; + } else if (input->an_write != PASS || + input->aksv_write != PASS || + input->bksv_read != PASS || + input->bksv_validation != PASS || + input->ainfo_write == FAIL) { + /* 1A-05: consider invalid bksv a failure */ + fail_and_restart_in_ms(0, &status, output); + break; + } + set_watchdog_in_ms(hdcp, 100, output); + set_state_id(hdcp, output, D1_A23_WAIT_FOR_R0_PRIME); + break; + case D1_A23_WAIT_FOR_R0_PRIME: + if (input->bstatus_read != PASS) { + fail_and_restart_in_ms(0, &status, output); + break; + } else if (input->r0p_available_dp != PASS) { + if (event_ctx->event == MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) + fail_and_restart_in_ms(0, &status, output); + else + increment_stay_counter(hdcp); + break; + } + callback_in_ms(0, output); + set_state_id(hdcp, output, D1_A2_COMPUTATIONS_A3_VALIDATE_RX_A5_TEST_FOR_REPEATER); + break; + case D1_A2_COMPUTATIONS_A3_VALIDATE_RX_A5_TEST_FOR_REPEATER: + if (input->r0p_read != PASS) { + fail_and_restart_in_ms(0, &status, output); + break; + } else if (input->rx_validation != PASS) { + if (hdcp->state.stay_count < 2) { + /* allow 2 additional retries */ + callback_in_ms(0, output); + increment_stay_counter(hdcp); + } else { + /* + * 1A-06: consider invalid r0' a failure + * after 3 attempts. + * 1A-08: consider bksv listed in SRM a failure + */ + /* + * some slow RX will fail rx validation when it is + * not ready. give it more time to react before retry. + */ + fail_and_restart_in_ms(1000, &status, output); + } + break; + } else if ((!conn->is_repeater && input->encryption != PASS) || + (!conn->is_repeater && is_dp_mst_hdcp(hdcp) && input->stream_encryption_dp != PASS)) { + fail_and_restart_in_ms(0, &status, output); + break; + } + if (conn->is_repeater) { + set_watchdog_in_ms(hdcp, 5000, output); + set_state_id(hdcp, output, D1_A6_WAIT_FOR_READY); + } else { + set_state_id(hdcp, output, D1_A4_AUTHENTICATED); + HDCP_FULL_DDC_TRACE(hdcp); + } + break; + case D1_A4_AUTHENTICATED: + if (input->link_integrity_check != PASS || + input->reauth_request_check != PASS) { + /* 1A-07: restart hdcp on a link integrity failure */ + fail_and_restart_in_ms(0, &status, output); + break; + } + break; + case D1_A6_WAIT_FOR_READY: + if (input->link_integrity_check == FAIL || + input->reauth_request_check == FAIL) { + fail_and_restart_in_ms(0, &status, output); + break; + } else if (input->ready_check != PASS) { + if (event_ctx->event == + MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { + /* 1B-04: fail hdcp on ksv list READY timeout */ + /* prevent black screen in next attempt */ + adjust->hdcp1.postpone_encryption = 1; + fail_and_restart_in_ms(0, &status, output); + } else { + increment_stay_counter(hdcp); + } + break; + } + callback_in_ms(0, output); + set_state_id(hdcp, output, D1_A7_READ_KSV_LIST); + break; + case D1_A7_READ_KSV_LIST: + if (input->binfo_read_dp != PASS || + input->max_cascade_check != PASS || + input->max_devs_check != PASS) { + /* 1B-06: consider MAX_DEVS_EXCEEDED a failure */ + /* 1B-07: consider MAX_CASCADE_EXCEEDED a failure */ + fail_and_restart_in_ms(0, &status, output); + break; + } else if (input->device_count_check != PASS) { + /* + * some slow dongle doesn't update + * device count as soon as downstream is connected. + * give it more time to react. + */ + adjust->hdcp1.postpone_encryption = 1; + fail_and_restart_in_ms(1000, &status, output); + break; + } else if (input->ksvlist_read != PASS || + input->vp_read != PASS) { + fail_and_restart_in_ms(0, &status, output); + break; + } else if (input->ksvlist_vp_validation != PASS) { + if (hdcp->state.stay_count < 2) { + /* allow 2 additional retries */ + callback_in_ms(0, output); + increment_stay_counter(hdcp); + } else { + /* + * 1B-05: consider invalid v' a failure + * after 3 attempts. + */ + fail_and_restart_in_ms(0, &status, output); + } + break; + } else if (input->encryption != PASS || + (is_dp_mst_hdcp(hdcp) && input->stream_encryption_dp != PASS)) { + fail_and_restart_in_ms(0, &status, output); + break; + } + set_state_id(hdcp, output, D1_A4_AUTHENTICATED); + HDCP_FULL_DDC_TRACE(hdcp); + break; + default: + fail_and_restart_in_ms(0, &status, output); + break; + } + + return status; +} |
