diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link/link_resource.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/link_resource.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_resource.c b/drivers/gpu/drm/amd/display/dc/link/link_resource.c new file mode 100644 index 0000000000..bd42bb273c --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/link/link_resource.c @@ -0,0 +1,114 @@ +/* + * 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; + } + } + } + } +} |