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 const struct dc *dc, 40 struct dc_state *state); 41 42 /* 43 * Copies a link encoder assignment from another state. 44 */ 45 void link_enc_cfg_copy(const struct dc_state *src_ctx, struct dc_state *dst_ctx); 46 47 /* 48 * Algorithm for assigning available DIG link encoders to streams. 49 * 50 * Update link_enc_assignments table and link_enc_avail list accordingly in 51 * struct resource_context. 52 * 53 * Loop over all streams twice: 54 * a) First assign encoders to unmappable endpoints. 55 * b) Then assign encoders to mappable endpoints. 56 */ 57 void link_enc_cfg_link_encs_assign( 58 struct dc *dc, 59 struct dc_state *state, 60 struct dc_stream_state *streams[], 61 uint8_t stream_count); 62 63 /* 64 * Unassign a link encoder from a stream. 65 * 66 * Update link_enc_assignments table and link_enc_avail list accordingly in 67 * struct resource_context. 68 */ 69 void link_enc_cfg_link_enc_unassign( 70 struct dc_state *state, 71 struct dc_stream_state *stream); 72 73 /* 74 * Check whether the transmitter driven by a link encoder is a mappable 75 * endpoint. 76 */ 77 bool link_enc_cfg_is_transmitter_mappable( 78 struct dc *dc, 79 struct link_encoder *link_enc); 80 81 /* Return stream using DIG link encoder resource. NULL if unused. */ 82 struct dc_stream_state *link_enc_cfg_get_stream_using_link_enc( 83 struct dc *dc, 84 enum engine_id eng_id); 85 86 /* Return link using DIG link encoder resource. NULL if unused. */ 87 struct dc_link *link_enc_cfg_get_link_using_link_enc( 88 struct dc *dc, 89 enum engine_id eng_id); 90 91 /* Return DIG link encoder used by link. NULL if unused. */ 92 struct link_encoder *link_enc_cfg_get_link_enc_used_by_link( 93 struct dc *dc, 94 const struct dc_link *link); 95 96 /* Return next available DIG link encoder. NULL if none available. */ 97 struct link_encoder *link_enc_cfg_get_next_avail_link_enc(struct dc *dc); 98 99 /* Return DIG link encoder used by stream. NULL if unused. */ 100 struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream( 101 struct dc *dc, 102 const struct dc_stream_state *stream); 103 104 /* Return DIG link encoder. NULL if unused. */ 105 struct link_encoder *link_enc_cfg_get_link_enc(const struct dc_link *link); 106 107 /* Return DIG link encoder used by stream in current/previous state. NULL if unused. */ 108 struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream_current( 109 struct dc *dc, 110 const struct dc_stream_state *stream); 111 112 /* Return true if encoder available to use. */ 113 bool link_enc_cfg_is_link_enc_avail(struct dc *dc, enum engine_id eng_id, struct dc_link *link); 114 115 /* Returns true if encoder assignments in supplied state pass validity checks. */ 116 bool link_enc_cfg_validate(struct dc *dc, struct dc_state *state); 117 118 /* Set the link encoder assignment mode for the current_state to LINK_ENC_CFG_TRANSIENT mode. 119 * This indicates that a new_state is in the process of being applied to hardware. 120 * During this transition, old and new encoder assignments should be accessible from the old_state. 121 * Only allow transition into transient mode if new encoder assignments are valid. 122 */ 123 void link_enc_cfg_set_transient_mode(struct dc *dc, struct dc_state *current_state, struct dc_state *new_state); 124 125 #endif /* DC_INC_LINK_ENC_CFG_H_ */ 126