1 /* 2 * Copyright 2021 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_INC_LINK_ENC_CFG_H_ 27 #define DC_INC_LINK_ENC_CFG_H_ 28 29 /* This module implements functionality for dynamically assigning DIG link 30 * encoder resources to display endpoints (links). 31 */ 32 33 #include "core_types.h" 34 35 /* 36 * Initialise link encoder resource tracking. 37 */ 38 void link_enc_cfg_init( 39 struct dc *dc, 40 struct dc_state *state); 41 42 /* 43 * Algorithm for assigning available DIG link encoders to streams. 44 * 45 * Update link_enc_assignments table and link_enc_avail list accordingly in 46 * struct resource_context. 47 * 48 * Loop over all streams twice: 49 * a) First assign encoders to unmappable endpoints. 50 * b) Then assign encoders to mappable endpoints. 51 */ 52 void link_enc_cfg_link_encs_assign( 53 struct dc *dc, 54 struct dc_state *state, 55 struct dc_stream_state *streams[], 56 uint8_t stream_count); 57 58 /* 59 * Unassign a link encoder from a stream. 60 * 61 * Update link_enc_assignments table and link_enc_avail list accordingly in 62 * struct resource_context. 63 */ 64 void link_enc_cfg_link_enc_unassign( 65 struct dc_state *state, 66 struct dc_stream_state *stream); 67 68 /* 69 * Check whether the transmitter driven by a link encoder is a mappable 70 * endpoint. 71 */ 72 bool link_enc_cfg_is_transmitter_mappable( 73 struct dc_state *state, 74 struct link_encoder *link_enc); 75 76 /* Return link using DIG link encoder resource. NULL if unused. */ 77 struct dc_link *link_enc_cfg_get_link_using_link_enc( 78 struct dc_state *state, 79 enum engine_id eng_id); 80 81 /* Return DIG link encoder used by link. NULL if unused. */ 82 struct link_encoder *link_enc_cfg_get_link_enc_used_by_link( 83 struct dc_state *state, 84 const struct dc_link *link); 85 86 /* Return next available DIG link encoder. NULL if none available. */ 87 struct link_encoder *link_enc_cfg_get_next_avail_link_enc( 88 const struct dc *dc, 89 const struct dc_state *state); 90 91 #endif /* DC_INC_LINK_ENC_CFG_H_ */ 92