1 /* 2 * Copyright 2023 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 /* FILE POLICY AND INTENDED USAGE: 26 * This file implements accessors to link resource. 27 */ 28 29 #include "link_resource.h" 30 #include "protocols/link_dp_capability.h" 31 32 void link_get_cur_link_res(const struct dc_link *link, 33 struct link_resource *link_res) 34 { 35 int i; 36 struct pipe_ctx *pipe = NULL; 37 38 memset(link_res, 0, sizeof(*link_res)); 39 40 for (i = 0; i < MAX_PIPES; i++) { 41 pipe = &link->dc->current_state->res_ctx.pipe_ctx[i]; 42 if (pipe->stream && pipe->stream->link && pipe->top_pipe == NULL) { 43 if (pipe->stream->link == link) { 44 *link_res = pipe->link_res; 45 break; 46 } 47 } 48 } 49 50 } 51 52 void link_get_cur_res_map(const struct dc *dc, uint32_t *map) 53 { 54 struct dc_link *link; 55 uint32_t i; 56 uint32_t hpo_dp_recycle_map = 0; 57 58 *map = 0; 59 60 if (dc->caps.dp_hpo) { 61 for (i = 0; i < dc->caps.max_links; i++) { 62 link = dc->links[i]; 63 if (link->link_status.link_active && 64 link_dp_get_encoding_format(&link->reported_link_cap) == DP_128b_132b_ENCODING && 65 link_dp_get_encoding_format(&link->cur_link_settings) != DP_128b_132b_ENCODING) 66 /* hpo dp link encoder is considered as recycled, when RX reports 128b/132b encoding capability 67 * but current link doesn't use it. 68 */ 69 hpo_dp_recycle_map |= (1 << i); 70 } 71 *map |= (hpo_dp_recycle_map << LINK_RES_HPO_DP_REC_MAP__SHIFT); 72 } 73 } 74 75 void link_restore_res_map(const struct dc *dc, uint32_t *map) 76 { 77 struct dc_link *link; 78 uint32_t i; 79 unsigned int available_hpo_dp_count; 80 uint32_t hpo_dp_recycle_map = (*map & LINK_RES_HPO_DP_REC_MAP__MASK) 81 >> LINK_RES_HPO_DP_REC_MAP__SHIFT; 82 83 if (dc->caps.dp_hpo) { 84 available_hpo_dp_count = dc->res_pool->hpo_dp_link_enc_count; 85 /* remove excess 128b/132b encoding support for not recycled links */ 86 for (i = 0; i < dc->caps.max_links; i++) { 87 if ((hpo_dp_recycle_map & (1 << i)) == 0) { 88 link = dc->links[i]; 89 if (link->type != dc_connection_none && 90 link_dp_get_encoding_format(&link->verified_link_cap) == DP_128b_132b_ENCODING) { 91 if (available_hpo_dp_count > 0) 92 available_hpo_dp_count--; 93 else 94 /* remove 128b/132b encoding capability by limiting verified link rate to HBR3 */ 95 link->verified_link_cap.link_rate = LINK_RATE_HIGH3; 96 } 97 } 98 } 99 /* remove excess 128b/132b encoding support for recycled links */ 100 for (i = 0; i < dc->caps.max_links; i++) { 101 if ((hpo_dp_recycle_map & (1 << i)) != 0) { 102 link = dc->links[i]; 103 if (link->type != dc_connection_none && 104 link_dp_get_encoding_format(&link->verified_link_cap) == DP_128b_132b_ENCODING) { 105 if (available_hpo_dp_count > 0) 106 available_hpo_dp_count--; 107 else 108 /* remove 128b/132b encoding capability by limiting verified link rate to HBR3 */ 109 link->verified_link_cap.link_rate = LINK_RATE_HIGH3; 110 } 111 } 112 } 113 } 114 } 115