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_DP_CAPABILITY_H__ 27 #define __DC_LINK_DP_CAPABILITY_H__ 28 29 #include "link.h" 30 31 bool detect_dp_sink_caps(struct dc_link *link); 32 33 void detect_edp_sink_caps(struct dc_link *link); 34 35 struct dc_link_settings dp_get_max_link_cap(struct dc_link *link); 36 37 bool dp_get_max_link_enc_cap(const struct dc_link *link, 38 struct dc_link_settings *max_link_enc_cap); 39 40 const struct dc_link_settings *dp_get_verified_link_cap( 41 const struct dc_link *link); 42 43 enum dp_link_encoding link_dp_get_encoding_format( 44 const struct dc_link_settings *link_settings); 45 46 enum dc_status dp_retrieve_lttpr_cap(struct dc_link *link); 47 48 /* Convert PHY repeater count read from DPCD uint8_t. */ 49 uint8_t dp_parse_lttpr_repeater_count(uint8_t lttpr_repeater_count); 50 51 /* Calculate embedded LTTPR address offset for vendor-specific behaviour */ 52 uint32_t dp_get_closest_lttpr_offset(uint8_t lttpr_count); 53 54 bool dp_is_sink_present(struct dc_link *link); 55 56 bool dp_is_lttpr_present(struct dc_link *link); 57 58 bool dp_is_fec_supported(const struct dc_link *link); 59 60 bool is_dp_active_dongle(const struct dc_link *link); 61 62 bool is_dp_branch_device(const struct dc_link *link); 63 64 void dpcd_write_cable_id_to_dprx(struct dc_link *link); 65 66 bool dp_should_enable_fec(const struct dc_link *link); 67 68 bool dp_is_128b_132b_signal(struct pipe_ctx *pipe_ctx); 69 70 /* Initialize output parameter lt_settings. */ 71 void dp_decide_training_settings( 72 struct dc_link *link, 73 const struct link_resource *link_res, 74 const struct dc_link_settings *link_setting, 75 struct link_training_settings *lt_settings); 76 77 bool link_decide_link_settings( 78 struct dc_stream_state *stream, 79 struct dc_link_settings *link_setting); 80 81 bool edp_decide_link_settings(struct dc_link *link, 82 struct dc_link_settings *link_setting, uint32_t req_bw); 83 84 bool decide_edp_link_settings_with_dsc(struct dc_link *link, 85 struct dc_link_settings *link_setting, 86 uint32_t req_bw, 87 enum dc_link_rate max_link_rate); 88 89 enum dp_link_encoding mst_decide_link_encoding_format(const struct dc_link *link); 90 91 void dpcd_set_source_specific_data(struct dc_link *link); 92 93 /*query dpcd for version and mst cap addresses*/ 94 bool read_is_mst_supported(struct dc_link *link); 95 96 bool decide_fallback_link_setting( 97 struct dc_link *link, 98 struct dc_link_settings *max, 99 struct dc_link_settings *cur, 100 enum link_training_result training_result); 101 102 bool dp_verify_link_cap_with_retries( 103 struct dc_link *link, 104 struct dc_link_settings *known_limit_link_setting, 105 int attempts); 106 107 uint32_t link_bw_kbps_from_raw_frl_link_rate_data(uint8_t bw); 108 109 bool dp_overwrite_extended_receiver_cap(struct dc_link *link); 110 111 #endif /* __DC_LINK_DP_CAPABILITY_H__ */ 112