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1/*2 * Copyright 2023 Advanced Micro Devices, Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: AMD23 *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 32void 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 52void 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 capability67 * 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 75void 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 else94 /* 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 else108 /* 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