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