1 /* 2 * Copyright 2022 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 #ifndef __DC_LINK_H__ 27 #define __DC_LINK_H__ 28 29 /* FILE POLICY AND INTENDED USAGE: 30 * 31 * This header declares link functions exposed to dc. All functions must have 32 * "link_" as prefix. For example link_run_my_function. This header is strictly 33 * private in dc and should never be included in other header files. dc 34 * components should include this header in their .c files in order to access 35 * functions in link folder. This file should never include any header files in 36 * link folder. If there is a need to expose a function declared in one of 37 * header files in side link folder, you need to move the function declaration 38 * into this file and prefix it with "link_". 39 */ 40 #include "core_types.h" 41 42 struct link_init_data { 43 const struct dc *dc; 44 struct dc_context *ctx; /* TODO: remove 'dal' when DC is complete. */ 45 uint32_t connector_index; /* this will be mapped to the HPD pins */ 46 uint32_t link_index; /* this is mapped to DAL display_index 47 TODO: remove it when DC is complete. */ 48 bool is_dpia_link; 49 }; 50 51 struct link_service { 52 void (*dp_handle_automated_test)(struct dc_link *link); 53 bool (*dp_set_test_pattern)( 54 struct dc_link *link, 55 enum dp_test_pattern test_pattern, 56 enum dp_test_pattern_color_space test_pattern_color_space, 57 const struct link_training_settings *p_link_settings, 58 const unsigned char *p_custom_pattern, 59 unsigned int cust_pattern_size); 60 void (*dp_set_preferred_link_settings)(struct dc *dc, 61 struct dc_link_settings *link_setting, 62 struct dc_link *link); 63 void (*dp_set_preferred_training_settings)(struct dc *dc, 64 struct dc_link_settings *link_setting, 65 struct dc_link_training_overrides *lt_overrides, 66 struct dc_link *link, 67 bool skip_immediate_retrain); 68 bool (*dp_trace_is_initialized)(struct dc_link *link); 69 void (*dp_trace_set_is_logged_flag)(struct dc_link *link, 70 bool in_detection, 71 bool is_logged); 72 bool (*dp_trace_is_logged)(struct dc_link *link, bool in_detection); 73 unsigned long long (*dp_trace_get_lt_end_timestamp)( 74 struct dc_link *link, bool in_detection); 75 const struct dp_trace_lt_counts *(*dp_trace_get_lt_counts)( 76 struct dc_link *link, bool in_detection); 77 unsigned int (*dp_trace_get_link_loss_count)(struct dc_link *link); 78 }; 79 80 struct dc_link *link_create(const struct link_init_data *init_params); 81 void link_destroy(struct dc_link **link); 82 const struct link_service *link_get_link_service(void); 83 84 // TODO - convert any function declarations below to function pointers 85 struct gpio *link_get_hpd_gpio(struct dc_bios *dcb, 86 struct graphics_object_id link_id, 87 struct gpio_service *gpio_service); 88 89 struct ddc_service_init_data { 90 struct graphics_object_id id; 91 struct dc_context *ctx; 92 struct dc_link *link; 93 bool is_dpia_link; 94 }; 95 96 struct ddc_service *link_create_ddc_service( 97 struct ddc_service_init_data *ddc_init_data); 98 99 void link_destroy_ddc_service(struct ddc_service **ddc); 100 101 bool link_is_in_aux_transaction_mode(struct ddc_service *ddc); 102 103 bool link_query_ddc_data( 104 struct ddc_service *ddc, 105 uint32_t address, 106 uint8_t *write_buf, 107 uint32_t write_size, 108 uint8_t *read_buf, 109 uint32_t read_size); 110 111 112 /* Attempt to submit an aux payload, retrying on timeouts, defers, and busy 113 * states as outlined in the DP spec. Returns true if the request was 114 * successful. 115 * 116 * NOTE: The function requires explicit mutex on DM side in order to prevent 117 * potential race condition. DC components should call the dpcd read/write 118 * function in dm_helpers in order to access dpcd safely 119 */ 120 bool link_aux_transfer_with_retries_no_mutex(struct ddc_service *ddc, 121 struct aux_payload *payload); 122 123 uint32_t link_get_aux_defer_delay(struct ddc_service *ddc); 124 125 bool link_is_dp_128b_132b_signal(struct pipe_ctx *pipe_ctx); 126 127 enum dp_link_encoding link_dp_get_encoding_format( 128 const struct dc_link_settings *link_settings); 129 130 bool link_decide_link_settings( 131 struct dc_stream_state *stream, 132 struct dc_link_settings *link_setting); 133 134 void link_dp_trace_set_edp_power_timestamp(struct dc_link *link, 135 bool power_up); 136 uint64_t link_dp_trace_get_edp_poweron_timestamp(struct dc_link *link); 137 uint64_t link_dp_trace_get_edp_poweroff_timestamp(struct dc_link *link); 138 139 bool link_is_edp_ilr_optimization_required(struct dc_link *link, 140 struct dc_crtc_timing *crtc_timing); 141 142 bool link_backlight_enable_aux(struct dc_link *link, bool enable); 143 void link_edp_add_delay_for_T9(struct dc_link *link); 144 bool link_edp_receiver_ready_T9(struct dc_link *link); 145 bool link_edp_receiver_ready_T7(struct dc_link *link); 146 bool link_power_alpm_dpcd_enable(struct dc_link *link, bool enable); 147 bool link_set_sink_vtotal_in_psr_active(const struct dc_link *link, 148 uint16_t psr_vtotal_idle, uint16_t psr_vtotal_su); 149 void link_get_psr_residency(const struct dc_link *link, uint32_t *residency); 150 enum dc_status link_increase_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn); 151 enum dc_status link_reduce_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn); 152 void link_blank_all_dp_displays(struct dc *dc); 153 void link_blank_all_edp_displays(struct dc *dc); 154 void link_blank_dp_stream(struct dc_link *link, bool hw_init); 155 void link_resume(struct dc_link *link); 156 void link_set_dpms_on( 157 struct dc_state *state, 158 struct pipe_ctx *pipe_ctx); 159 void link_set_dpms_off(struct pipe_ctx *pipe_ctx); 160 void link_dp_source_sequence_trace(struct dc_link *link, uint8_t dp_test_mode); 161 void link_set_dsc_on_stream(struct pipe_ctx *pipe_ctx, bool enable); 162 bool link_set_dsc_enable(struct pipe_ctx *pipe_ctx, bool enable); 163 bool link_update_dsc_config(struct pipe_ctx *pipe_ctx); 164 enum dc_status link_validate_mode_timing( 165 const struct dc_stream_state *stream, 166 struct dc_link *link, 167 const struct dc_crtc_timing *timing); 168 bool link_detect(struct dc_link *link, enum dc_detect_reason reason); 169 bool link_detect_connection_type(struct dc_link *link, 170 enum dc_connection_type *type); 171 const struct dc_link_status *link_get_status(const struct dc_link *link); 172 /* return true if the connected receiver supports the hdcp version */ 173 bool link_is_hdcp14(struct dc_link *link, enum signal_type signal); 174 bool link_is_hdcp22(struct dc_link *link, enum signal_type signal); 175 void link_clear_dprx_states(struct dc_link *link); 176 bool link_reset_cur_dp_mst_topology(struct dc_link *link); 177 uint32_t dp_link_bandwidth_kbps( 178 const struct dc_link *link, 179 const struct dc_link_settings *link_settings); 180 uint32_t link_timing_bandwidth_kbps(const struct dc_crtc_timing *timing); 181 void link_get_cur_res_map(const struct dc *dc, uint32_t *map); 182 void link_restore_res_map(const struct dc *dc, uint32_t *map); 183 void link_get_cur_link_res(const struct dc_link *link, 184 struct link_resource *link_res); 185 void dp_set_drive_settings( 186 struct dc_link *link, 187 const struct link_resource *link_res, 188 struct link_training_settings *lt_settings); 189 #endif /* __DC_LINK_HPD_H__ */ 190