1 /* 2 * Copyright 2015 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_H__ 27 #define __DC_LINK_DP_H__ 28 29 #define LINK_TRAINING_ATTEMPTS 4 30 #define LINK_TRAINING_RETRY_DELAY 50 /* ms */ 31 32 struct dc_link; 33 struct dc_stream_state; 34 struct dc_link_settings; 35 36 bool dp_verify_link_cap( 37 struct dc_link *link, 38 struct dc_link_settings *known_limit_link_setting, 39 int *fail_count); 40 41 bool dp_validate_mode_timing( 42 struct dc_link *link, 43 const struct dc_crtc_timing *timing); 44 45 void decide_link_settings( 46 struct dc_stream_state *stream, 47 struct dc_link_settings *link_setting); 48 49 bool perform_link_training_with_retries( 50 struct dc_link *link, 51 const struct dc_link_settings *link_setting, 52 bool skip_video_pattern, 53 int attempts); 54 55 bool is_mst_supported(struct dc_link *link); 56 57 bool detect_dp_sink_caps(struct dc_link *link); 58 59 void detect_edp_sink_caps(struct dc_link *link); 60 61 bool is_dp_active_dongle(const struct dc_link *link); 62 63 void dp_enable_mst_on_sink(struct dc_link *link, bool enable); 64 65 #endif /* __DC_LINK_DP_H__ */ 66