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path: root/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c
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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.c307
1 files changed, 307 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..1d187809b709
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_transition.c
@@ -0,0 +1,307 @@
+/*
+ * 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 ||
+ input->rx_validation != PASS ||
+ (!conn->is_repeater && input->encryption != PASS)) {
+ /* 1A-06: consider invalid r0' a failure */
+ /* 1A-08: consider bksv listed in SRM a failure */
+ 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_AUTHENICATED);
+ HDCP_FULL_DDC_TRACE(hdcp);
+ }
+ break;
+ case H1_A45_AUTHENICATED:
+ 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_AUTHENICATED);
+ 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
+ */
+ fail_and_restart_in_ms(0, &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_AUTHENICATED);
+ HDCP_FULL_DDC_TRACE(hdcp);
+ }
+ break;
+ case D1_A4_AUTHENICATED:
+ if (input->link_integiry_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_integiry_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_AUTHENICATED);
+ HDCP_FULL_DDC_TRACE(hdcp);
+ break;
+ default:
+ fail_and_restart_in_ms(0, &status, output);
+ break;
+ }
+
+ return status;
+}