115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
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/*
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* Copyright 2023 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: AMD
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*
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*/
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/* FILE POLICY AND INTENDED USAGE:
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* This file implements accessors to link resource.
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*/
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#include "link_resource.h"
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#include "protocols/link_dp_capability.h"
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void link_get_cur_link_res(const struct dc_link *link,
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struct link_resource *link_res)
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{
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int i;
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struct pipe_ctx *pipe = NULL;
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memset(link_res, 0, sizeof(*link_res));
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for (i = 0; i < MAX_PIPES; i++) {
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pipe = &link->dc->current_state->res_ctx.pipe_ctx[i];
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if (pipe->stream && pipe->stream->link && pipe->top_pipe == NULL) {
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if (pipe->stream->link == link) {
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*link_res = pipe->link_res;
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break;
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}
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}
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}
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}
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void link_get_cur_res_map(const struct dc *dc, uint32_t *map)
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{
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struct dc_link *link;
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uint32_t i;
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uint32_t hpo_dp_recycle_map = 0;
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*map = 0;
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if (dc->caps.dp_hpo) {
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for (i = 0; i < dc->caps.max_links; i++) {
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link = dc->links[i];
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if (link->link_status.link_active &&
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link_dp_get_encoding_format(&link->reported_link_cap) == DP_128b_132b_ENCODING &&
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link_dp_get_encoding_format(&link->cur_link_settings) != DP_128b_132b_ENCODING)
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/* hpo dp link encoder is considered as recycled, when RX reports 128b/132b encoding capability
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* but current link doesn't use it.
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*/
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hpo_dp_recycle_map |= (1 << i);
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}
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*map |= (hpo_dp_recycle_map << LINK_RES_HPO_DP_REC_MAP__SHIFT);
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}
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}
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void link_restore_res_map(const struct dc *dc, uint32_t *map)
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{
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struct dc_link *link;
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uint32_t i;
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unsigned int available_hpo_dp_count;
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uint32_t hpo_dp_recycle_map = (*map & LINK_RES_HPO_DP_REC_MAP__MASK)
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>> LINK_RES_HPO_DP_REC_MAP__SHIFT;
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if (dc->caps.dp_hpo) {
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available_hpo_dp_count = dc->res_pool->hpo_dp_link_enc_count;
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/* remove excess 128b/132b encoding support for not recycled links */
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for (i = 0; i < dc->caps.max_links; i++) {
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if ((hpo_dp_recycle_map & (1 << i)) == 0) {
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link = dc->links[i];
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if (link->type != dc_connection_none &&
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link_dp_get_encoding_format(&link->verified_link_cap) == DP_128b_132b_ENCODING) {
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if (available_hpo_dp_count > 0)
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available_hpo_dp_count--;
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else
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/* remove 128b/132b encoding capability by limiting verified link rate to HBR3 */
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link->verified_link_cap.link_rate = LINK_RATE_HIGH3;
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}
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}
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}
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/* remove excess 128b/132b encoding support for recycled links */
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for (i = 0; i < dc->caps.max_links; i++) {
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if ((hpo_dp_recycle_map & (1 << i)) != 0) {
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link = dc->links[i];
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if (link->type != dc_connection_none &&
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link_dp_get_encoding_format(&link->verified_link_cap) == DP_128b_132b_ENCODING) {
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if (available_hpo_dp_count > 0)
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available_hpo_dp_count--;
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else
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/* remove 128b/132b encoding capability by limiting verified link rate to HBR3 */
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link->verified_link_cap.link_rate = LINK_RATE_HIGH3;
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}
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}
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}
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}
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}
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