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 #include "dc_link.h" 42 43 struct gpio *link_get_hpd_gpio(struct dc_bios *dcb, 44 struct graphics_object_id link_id, 45 struct gpio_service *gpio_service); 46 47 struct ddc_service_init_data { 48 struct graphics_object_id id; 49 struct dc_context *ctx; 50 struct dc_link *link; 51 bool is_dpia_link; 52 }; 53 54 struct ddc_service *link_create_ddc_service( 55 struct ddc_service_init_data *ddc_init_data); 56 57 void link_destroy_ddc_service(struct ddc_service **ddc); 58 59 bool link_is_in_aux_transaction_mode(struct ddc_service *ddc); 60 61 bool link_query_ddc_data( 62 struct ddc_service *ddc, 63 uint32_t address, 64 uint8_t *write_buf, 65 uint32_t write_size, 66 uint8_t *read_buf, 67 uint32_t read_size); 68 69 70 /* Attempt to submit an aux payload, retrying on timeouts, defers, and busy 71 * states as outlined in the DP spec. Returns true if the request was 72 * successful. 73 * 74 * NOTE: The function requires explicit mutex on DM side in order to prevent 75 * potential race condition. DC components should call the dpcd read/write 76 * function in dm_helpers in order to access dpcd safely 77 */ 78 bool link_aux_transfer_with_retries_no_mutex(struct ddc_service *ddc, 79 struct aux_payload *payload); 80 81 uint32_t link_get_aux_defer_delay(struct ddc_service *ddc); 82 83 bool link_is_dp_128b_132b_signal(struct pipe_ctx *pipe_ctx); 84 85 enum dp_link_encoding link_dp_get_encoding_format( 86 const struct dc_link_settings *link_settings); 87 88 bool link_decide_link_settings( 89 struct dc_stream_state *stream, 90 struct dc_link_settings *link_setting); 91 92 void link_dp_trace_set_edp_power_timestamp(struct dc_link *link, 93 bool power_up); 94 uint64_t link_dp_trace_get_edp_poweron_timestamp(struct dc_link *link); 95 uint64_t link_dp_trace_get_edp_poweroff_timestamp(struct dc_link *link); 96 97 bool link_is_edp_ilr_optimization_required(struct dc_link *link, 98 struct dc_crtc_timing *crtc_timing); 99 100 bool link_backlight_enable_aux(struct dc_link *link, bool enable); 101 void link_edp_add_delay_for_T9(struct dc_link *link); 102 bool link_edp_receiver_ready_T9(struct dc_link *link); 103 bool link_edp_receiver_ready_T7(struct dc_link *link); 104 bool link_power_alpm_dpcd_enable(struct dc_link *link, bool enable); 105 bool link_set_sink_vtotal_in_psr_active(const struct dc_link *link, 106 uint16_t psr_vtotal_idle, uint16_t psr_vtotal_su); 107 void link_get_psr_residency(const struct dc_link *link, uint32_t *residency); 108 109 #endif /* __DC_LINK_HPD_H__ */ 110