diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h | 584 |
1 files changed, 584 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h new file mode 100644 index 000000000..55c7d8731 --- /dev/null +++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h @@ -0,0 +1,584 @@ +/* + * 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 + * + */ + +#ifndef HDCP_H_ +#define HDCP_H_ + +#include "mod_hdcp.h" +#include "hdcp_log.h" + +#include <drm/display/drm_dp_helper.h> +#include <drm/display/drm_hdcp_helper.h> + +enum mod_hdcp_trans_input_result { + UNKNOWN = 0, + PASS, + FAIL +}; + +struct mod_hdcp_transition_input_hdcp1 { + uint8_t bksv_read; + uint8_t bksv_validation; + uint8_t create_session; + uint8_t an_write; + uint8_t aksv_write; + uint8_t ainfo_write; + uint8_t bcaps_read; + uint8_t r0p_read; + uint8_t rx_validation; + uint8_t encryption; + uint8_t link_maintenance; + uint8_t ready_check; + uint8_t bstatus_read; + uint8_t max_cascade_check; + uint8_t max_devs_check; + uint8_t device_count_check; + uint8_t ksvlist_read; + uint8_t vp_read; + uint8_t ksvlist_vp_validation; + + uint8_t hdcp_capable_dp; + uint8_t binfo_read_dp; + uint8_t r0p_available_dp; + uint8_t link_integrity_check; + uint8_t reauth_request_check; + uint8_t stream_encryption_dp; +}; + +struct mod_hdcp_transition_input_hdcp2 { + uint8_t hdcp2version_read; + uint8_t hdcp2_capable_check; + uint8_t create_session; + uint8_t ake_init_prepare; + uint8_t ake_init_write; + uint8_t rxstatus_read; + uint8_t ake_cert_available; + uint8_t ake_cert_read; + uint8_t ake_cert_validation; + uint8_t stored_km_write; + uint8_t no_stored_km_write; + uint8_t h_prime_available; + uint8_t h_prime_read; + uint8_t pairing_available; + uint8_t pairing_info_read; + uint8_t h_prime_validation; + uint8_t lc_init_prepare; + uint8_t lc_init_write; + uint8_t l_prime_available_poll; + uint8_t l_prime_read; + uint8_t l_prime_validation; + uint8_t eks_prepare; + uint8_t eks_write; + uint8_t enable_encryption; + uint8_t reauth_request_check; + uint8_t rx_id_list_read; + uint8_t device_count_check; + uint8_t rx_id_list_validation; + uint8_t repeater_auth_ack_write; + uint8_t prepare_stream_manage; + uint8_t stream_manage_write; + uint8_t stream_ready_available; + uint8_t stream_ready_read; + uint8_t stream_ready_validation; + + uint8_t rx_caps_read_dp; + uint8_t content_stream_type_write; + uint8_t link_integrity_check_dp; + uint8_t stream_encryption_dp; +}; + +union mod_hdcp_transition_input { + struct mod_hdcp_transition_input_hdcp1 hdcp1; + struct mod_hdcp_transition_input_hdcp2 hdcp2; +}; + +struct mod_hdcp_message_hdcp1 { + uint8_t an[8]; + uint8_t aksv[5]; + uint8_t ainfo; + uint8_t bksv[5]; + uint16_t r0p; + uint8_t bcaps; + uint16_t bstatus; + uint8_t ksvlist[635]; + uint16_t ksvlist_size; + uint8_t vp[20]; + + uint16_t binfo_dp; +}; + +struct mod_hdcp_message_hdcp2 { + uint8_t hdcp2version_hdmi; + uint8_t rxcaps_dp[3]; + uint8_t rxstatus[2]; + + uint8_t ake_init[12]; + uint8_t ake_cert[534]; + uint8_t ake_no_stored_km[129]; + uint8_t ake_stored_km[33]; + uint8_t ake_h_prime[33]; + uint8_t ake_pairing_info[17]; + uint8_t lc_init[9]; + uint8_t lc_l_prime[33]; + uint8_t ske_eks[25]; + uint8_t rx_id_list[177]; // 22 + 5 * 31 + uint16_t rx_id_list_size; + uint8_t repeater_auth_ack[17]; + uint8_t repeater_auth_stream_manage[68]; // 6 + 2 * 31 + uint16_t stream_manage_size; + uint8_t repeater_auth_stream_ready[33]; + uint8_t rxstatus_dp; + uint8_t content_stream_type_dp[2]; +}; + +union mod_hdcp_message { + struct mod_hdcp_message_hdcp1 hdcp1; + struct mod_hdcp_message_hdcp2 hdcp2; +}; + +struct mod_hdcp_auth_counters { + uint8_t stream_management_retry_count; +}; + +/* contains values per connection */ +struct mod_hdcp_connection { + struct mod_hdcp_link link; + uint8_t is_repeater; + uint8_t is_km_stored; + uint8_t is_hdcp1_revoked; + uint8_t is_hdcp2_revoked; + struct mod_hdcp_trace trace; + uint8_t hdcp1_retry_count; + uint8_t hdcp2_retry_count; +}; + +/* contains values per authentication cycle */ +struct mod_hdcp_authentication { + uint32_t id; + union mod_hdcp_message msg; + union mod_hdcp_transition_input trans_input; + struct mod_hdcp_auth_counters count; +}; + +/* contains values per state change */ +struct mod_hdcp_state { + uint8_t id; + uint32_t stay_count; +}; + +/* per event in a state */ +struct mod_hdcp_event_context { + enum mod_hdcp_event event; + uint8_t rx_id_list_ready; + uint8_t unexpected_event; +}; + +struct mod_hdcp { + /* per link */ + struct mod_hdcp_config config; + /* per connection */ + struct mod_hdcp_connection connection; + /* per displays */ + struct mod_hdcp_display displays[MAX_NUM_OF_DISPLAYS]; + /* per authentication attempt */ + struct mod_hdcp_authentication auth; + /* per state in an authentication */ + struct mod_hdcp_state state; + /* reserved memory buffer */ + uint8_t buf[2025]; +}; + +enum mod_hdcp_initial_state_id { + HDCP_UNINITIALIZED = 0x0, + HDCP_INITIAL_STATE_START = HDCP_UNINITIALIZED, + HDCP_INITIALIZED, + HDCP_CP_NOT_DESIRED, + HDCP_INITIAL_STATE_END = HDCP_CP_NOT_DESIRED +}; + +enum mod_hdcp_hdcp1_state_id { + HDCP1_STATE_START = HDCP_INITIAL_STATE_END, + H1_A0_WAIT_FOR_ACTIVE_RX, + H1_A1_EXCHANGE_KSVS, + H1_A2_COMPUTATIONS_A3_VALIDATE_RX_A6_TEST_FOR_REPEATER, + H1_A45_AUTHENTICATED, + H1_A8_WAIT_FOR_READY, + H1_A9_READ_KSV_LIST, + HDCP1_STATE_END = H1_A9_READ_KSV_LIST +}; + +enum mod_hdcp_hdcp1_dp_state_id { + HDCP1_DP_STATE_START = HDCP1_STATE_END, + D1_A0_DETERMINE_RX_HDCP_CAPABLE, + D1_A1_EXCHANGE_KSVS, + D1_A23_WAIT_FOR_R0_PRIME, + D1_A2_COMPUTATIONS_A3_VALIDATE_RX_A5_TEST_FOR_REPEATER, + D1_A4_AUTHENTICATED, + D1_A6_WAIT_FOR_READY, + D1_A7_READ_KSV_LIST, + HDCP1_DP_STATE_END = D1_A7_READ_KSV_LIST, +}; + +enum mod_hdcp_hdcp2_state_id { + HDCP2_STATE_START = HDCP1_DP_STATE_END, + H2_A0_KNOWN_HDCP2_CAPABLE_RX, + H2_A1_SEND_AKE_INIT, + H2_A1_VALIDATE_AKE_CERT, + H2_A1_SEND_NO_STORED_KM, + H2_A1_READ_H_PRIME, + H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME, + H2_A1_SEND_STORED_KM, + H2_A1_VALIDATE_H_PRIME, + H2_A2_LOCALITY_CHECK, + H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER, + H2_ENABLE_ENCRYPTION, + H2_A5_AUTHENTICATED, + H2_A6_WAIT_FOR_RX_ID_LIST, + H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK, + H2_A9_SEND_STREAM_MANAGEMENT, + H2_A9_VALIDATE_STREAM_READY, + HDCP2_STATE_END = H2_A9_VALIDATE_STREAM_READY, +}; + +enum mod_hdcp_hdcp2_dp_state_id { + HDCP2_DP_STATE_START = HDCP2_STATE_END, + D2_A0_DETERMINE_RX_HDCP_CAPABLE, + D2_A1_SEND_AKE_INIT, + D2_A1_VALIDATE_AKE_CERT, + D2_A1_SEND_NO_STORED_KM, + D2_A1_READ_H_PRIME, + D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME, + D2_A1_SEND_STORED_KM, + D2_A1_VALIDATE_H_PRIME, + D2_A2_LOCALITY_CHECK, + D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER, + D2_SEND_CONTENT_STREAM_TYPE, + D2_ENABLE_ENCRYPTION, + D2_A5_AUTHENTICATED, + D2_A6_WAIT_FOR_RX_ID_LIST, + D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK, + D2_A9_SEND_STREAM_MANAGEMENT, + D2_A9_VALIDATE_STREAM_READY, + HDCP2_DP_STATE_END = D2_A9_VALIDATE_STREAM_READY, + HDCP_STATE_END = HDCP2_DP_STATE_END, +}; + +/* hdcp1 executions and transitions */ +typedef enum mod_hdcp_status (*mod_hdcp_action)(struct mod_hdcp *hdcp); +uint8_t mod_hdcp_execute_and_set( + mod_hdcp_action func, uint8_t *flag, + enum mod_hdcp_status *status, struct mod_hdcp *hdcp, char *str); +enum mod_hdcp_status mod_hdcp_hdcp1_execution(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *input); +enum mod_hdcp_status mod_hdcp_hdcp1_dp_execution(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *input); +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 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); + +/* hdcp2 executions and transitions */ +enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp2 *input); +enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp2 *input); +enum mod_hdcp_status mod_hdcp_hdcp2_transition(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp2 *input, + struct mod_hdcp_output *output); +enum mod_hdcp_status mod_hdcp_hdcp2_dp_transition(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp2 *input, + struct mod_hdcp_output *output); + +/* log functions */ +void mod_hdcp_dump_binary_message(uint8_t *msg, uint32_t msg_size, + uint8_t *buf, uint32_t buf_size); +void mod_hdcp_log_ddc_trace(struct mod_hdcp *hdcp); +/* TODO: add adjustment log */ + +/* psp functions */ +enum mod_hdcp_status mod_hdcp_add_display_to_topology( + struct mod_hdcp *hdcp, struct mod_hdcp_display *display); +enum mod_hdcp_status mod_hdcp_remove_display_from_topology( + struct mod_hdcp *hdcp, uint8_t index); +enum mod_hdcp_status mod_hdcp_hdcp1_create_session(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp1_destroy_session(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp1_validate_rx(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp1_enable_encryption(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp1_validate_ksvlist_vp(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp1_enable_dp_stream_encryption( + struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp1_link_maintenance(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_create_session(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_destroy_session(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_prepare_ake_init(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_validate_ake_cert(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_validate_h_prime(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_prepare_lc_init(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_validate_l_prime(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_prepare_eks(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_enable_encryption(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_validate_rx_id_list(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_enable_dp_stream_encryption( + struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_prepare_stream_management( + struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_hdcp2_validate_stream_ready( + struct mod_hdcp *hdcp); + +/* ddc functions */ +enum mod_hdcp_status mod_hdcp_read_bksv(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_bcaps(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_bstatus(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_r0p(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_ksvlist(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_vp(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_binfo(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_write_aksv(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_write_ainfo(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_write_an(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_hdcp2version(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_rxcaps(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_rxstatus(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_ake_cert(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_h_prime(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_pairing_info(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_l_prime(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_rx_id_list(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_read_stream_ready(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_write_ake_init(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_write_no_stored_km(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_write_stored_km(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_write_lc_init(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_write_eks(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_write_repeater_auth_ack(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_write_stream_manage(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_write_content_type(struct mod_hdcp *hdcp); +enum mod_hdcp_status mod_hdcp_clear_cp_irq_status(struct mod_hdcp *hdcp); + +/* hdcp version helpers */ +static inline uint8_t is_dp_hdcp(struct mod_hdcp *hdcp) +{ + return (hdcp->connection.link.mode == MOD_HDCP_MODE_DP); +} + +static inline uint8_t is_dp_mst_hdcp(struct mod_hdcp *hdcp) +{ + return (hdcp->connection.link.mode == MOD_HDCP_MODE_DP && + hdcp->connection.link.dp.mst_enabled); +} + +static inline uint8_t is_hdmi_dvi_sl_hdcp(struct mod_hdcp *hdcp) +{ + return (hdcp->connection.link.mode == MOD_HDCP_MODE_DEFAULT); +} + +/* hdcp state helpers */ +static inline uint8_t current_state(struct mod_hdcp *hdcp) +{ + return hdcp->state.id; +} + +static inline void set_state_id(struct mod_hdcp *hdcp, + struct mod_hdcp_output *output, uint8_t id) +{ + memset(&hdcp->state, 0, sizeof(hdcp->state)); + hdcp->state.id = id; + /* callback timer should be reset per state */ + output->callback_stop = 1; + output->watchdog_timer_stop = 1; + HDCP_NEXT_STATE_TRACE(hdcp, id, output); +} + +static inline uint8_t is_in_hdcp1_states(struct mod_hdcp *hdcp) +{ + return (current_state(hdcp) > HDCP1_STATE_START && + current_state(hdcp) <= HDCP1_STATE_END); +} + +static inline uint8_t is_in_hdcp1_dp_states(struct mod_hdcp *hdcp) +{ + return (current_state(hdcp) > HDCP1_DP_STATE_START && + current_state(hdcp) <= HDCP1_DP_STATE_END); +} + +static inline uint8_t is_in_hdcp2_states(struct mod_hdcp *hdcp) +{ + return (current_state(hdcp) > HDCP2_STATE_START && + current_state(hdcp) <= HDCP2_STATE_END); +} + +static inline uint8_t is_in_hdcp2_dp_states(struct mod_hdcp *hdcp) +{ + return (current_state(hdcp) > HDCP2_DP_STATE_START && + current_state(hdcp) <= HDCP2_DP_STATE_END); +} + +static inline uint8_t is_in_authenticated_states(struct mod_hdcp *hdcp) +{ + return (current_state(hdcp) == D1_A4_AUTHENTICATED || + current_state(hdcp) == H1_A45_AUTHENTICATED || + current_state(hdcp) == D2_A5_AUTHENTICATED || + current_state(hdcp) == H2_A5_AUTHENTICATED); +} + +static inline uint8_t is_hdcp1(struct mod_hdcp *hdcp) +{ + return (is_in_hdcp1_states(hdcp) || is_in_hdcp1_dp_states(hdcp)); +} + +static inline uint8_t is_hdcp2(struct mod_hdcp *hdcp) +{ + return (is_in_hdcp2_states(hdcp) || is_in_hdcp2_dp_states(hdcp)); +} + +static inline uint8_t is_in_cp_not_desired_state(struct mod_hdcp *hdcp) +{ + return current_state(hdcp) == HDCP_CP_NOT_DESIRED; +} + +static inline uint8_t is_in_initialized_state(struct mod_hdcp *hdcp) +{ + return current_state(hdcp) == HDCP_INITIALIZED; +} + +/* transition operation helpers */ +static inline void increment_stay_counter(struct mod_hdcp *hdcp) +{ + hdcp->state.stay_count++; +} + +static inline void fail_and_restart_in_ms(uint16_t time, + enum mod_hdcp_status *status, + struct mod_hdcp_output *output) +{ + output->callback_needed = 1; + output->callback_delay = time; + output->watchdog_timer_needed = 0; + output->watchdog_timer_delay = 0; + *status = MOD_HDCP_STATUS_RESET_NEEDED; +} + +static inline void callback_in_ms(uint16_t time, struct mod_hdcp_output *output) +{ + output->callback_needed = 1; + output->callback_delay = time; +} + +static inline void set_watchdog_in_ms(struct mod_hdcp *hdcp, uint16_t time, + struct mod_hdcp_output *output) +{ + output->watchdog_timer_needed = 1; + output->watchdog_timer_delay = time; +} + +static inline void set_auth_complete(struct mod_hdcp *hdcp, + struct mod_hdcp_output *output) +{ + output->auth_complete = 1; + mod_hdcp_log_ddc_trace(hdcp); +} + +/* connection topology helpers */ +static inline uint8_t is_display_active(struct mod_hdcp_display *display) +{ + return display->state >= MOD_HDCP_DISPLAY_ACTIVE; +} + +static inline uint8_t is_display_encryption_enabled(struct mod_hdcp_display *display) +{ + return display->state >= MOD_HDCP_DISPLAY_ENCRYPTION_ENABLED; +} + +static inline uint8_t get_active_display_count(struct mod_hdcp *hdcp) +{ + uint8_t active_count = 0; + uint8_t i; + + for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) + if (is_display_active(&hdcp->displays[i])) + active_count++; + return active_count; +} + +static inline struct mod_hdcp_display *get_first_active_display( + struct mod_hdcp *hdcp) +{ + uint8_t i; + struct mod_hdcp_display *display = NULL; + + for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) + if (is_display_active(&hdcp->displays[i])) { + display = &hdcp->displays[i]; + break; + } + return display; +} + +static inline struct mod_hdcp_display *get_active_display_at_index( + struct mod_hdcp *hdcp, uint8_t index) +{ + uint8_t i; + struct mod_hdcp_display *display = NULL; + + for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) + if (hdcp->displays[i].index == index && + is_display_active(&hdcp->displays[i])) { + display = &hdcp->displays[i]; + break; + } + return display; +} + +static inline struct mod_hdcp_display *get_empty_display_container( + struct mod_hdcp *hdcp) +{ + uint8_t i; + struct mod_hdcp_display *display = NULL; + + for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) + if (!is_display_active(&hdcp->displays[i])) { + display = &hdcp->displays[i]; + break; + } + return display; +} + +static inline void reset_retry_counts(struct mod_hdcp *hdcp) +{ + hdcp->connection.hdcp1_retry_count = 0; + hdcp->connection.hdcp2_retry_count = 0; +} + +#endif /* HDCP_H_ */ |