diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_enc_cfg.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_enc_cfg.c | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_enc_cfg.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_enc_cfg.c new file mode 100644 index 000000000000..1361b87d86d7 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_enc_cfg.c @@ -0,0 +1,303 @@ +/* + * Copyright 2021 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 + * + */ + +#include "link_enc_cfg.h" +#include "resource.h" +#include "dc_link_dp.h" + +/* Check whether stream is supported by DIG link encoders. */ +static bool is_dig_link_enc_stream(struct dc_stream_state *stream) +{ + bool is_dig_stream = false; + struct link_encoder *link_enc = NULL; + int i; + + /* Loop over created link encoder objects. */ + for (i = 0; i < stream->ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) { + link_enc = stream->ctx->dc->res_pool->link_encoders[i]; + + if (link_enc && + ((uint32_t)stream->signal & link_enc->output_signals)) { + if (dc_is_dp_signal(stream->signal)) { + /* DIGs do not support DP2.0 streams with 128b/132b encoding. */ + struct dc_link_settings link_settings = {0}; + + decide_link_settings(stream, &link_settings); + if ((link_settings.link_rate >= LINK_RATE_LOW) && + link_settings.link_rate <= LINK_RATE_HIGH3) { + is_dig_stream = true; + break; + } + } else { + is_dig_stream = true; + break; + } + } + } + + return is_dig_stream; +} + +/* Update DIG link encoder resource tracking variables in dc_state. */ +static void update_link_enc_assignment( + struct dc_state *state, + struct dc_stream_state *stream, + enum engine_id eng_id, + bool add_enc) +{ + int eng_idx; + int stream_idx; + int i; + + if (eng_id != ENGINE_ID_UNKNOWN) { + eng_idx = eng_id - ENGINE_ID_DIGA; + stream_idx = -1; + + /* Index of stream in dc_state used to update correct entry in + * link_enc_assignments table. + */ + for (i = 0; i < state->stream_count; i++) { + if (stream == state->streams[i]) { + stream_idx = i; + break; + } + } + + /* Update link encoder assignments table, link encoder availability + * pool and link encoder assigned to stream in state. + * Add/remove encoder resource to/from stream. + */ + if (stream_idx != -1) { + if (add_enc) { + state->res_ctx.link_enc_assignments[stream_idx] = (struct link_enc_assignment){ + .valid = true, + .ep_id = (struct display_endpoint_id) { + .link_id = stream->link->link_id, + .ep_type = stream->link->ep_type}, + .eng_id = eng_id}; + state->res_ctx.link_enc_avail[eng_idx] = ENGINE_ID_UNKNOWN; + stream->link_enc = stream->ctx->dc->res_pool->link_encoders[eng_idx]; + } else { + state->res_ctx.link_enc_assignments[stream_idx].valid = false; + state->res_ctx.link_enc_avail[eng_idx] = eng_id; + stream->link_enc = NULL; + } + } else { + dm_output_to_console("%s: Stream not found in dc_state.\n", __func__); + } + } +} + +/* Return first available DIG link encoder. */ +static enum engine_id find_first_avail_link_enc( + struct dc_context *ctx, + struct dc_state *state) +{ + enum engine_id eng_id = ENGINE_ID_UNKNOWN; + int i; + + for (i = 0; i < ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) { + eng_id = state->res_ctx.link_enc_avail[i]; + if (eng_id != ENGINE_ID_UNKNOWN) + break; + } + + return eng_id; +} + +/* Return stream using DIG link encoder resource. NULL if unused. */ +static struct dc_stream_state *get_stream_using_link_enc( + struct dc_state *state, + enum engine_id eng_id) +{ + struct dc_stream_state *stream = NULL; + int stream_idx = -1; + int i; + + for (i = 0; i < state->stream_count; i++) { + struct link_enc_assignment assignment = state->res_ctx.link_enc_assignments[i]; + + if (assignment.valid && (assignment.eng_id == eng_id)) { + stream_idx = i; + break; + } + } + + if (stream_idx != -1) + stream = state->streams[stream_idx]; + else + dm_output_to_console("%s: No stream using DIG(%d).\n", __func__, eng_id); + + return stream; +} + +void link_enc_cfg_init( + struct dc *dc, + struct dc_state *state) +{ + int i; + + for (i = 0; i < dc->res_pool->res_cap->num_dig_link_enc; i++) { + if (dc->res_pool->link_encoders[i]) + state->res_ctx.link_enc_avail[i] = (enum engine_id) i; + else + state->res_ctx.link_enc_avail[i] = ENGINE_ID_UNKNOWN; + } +} + +void link_enc_cfg_link_encs_assign( + struct dc *dc, + struct dc_state *state, + struct dc_stream_state *streams[], + uint8_t stream_count) +{ + enum engine_id eng_id = ENGINE_ID_UNKNOWN; + int i; + + /* Release DIG link encoder resources before running assignment algorithm. */ + for (i = 0; i < stream_count; i++) + dc->res_pool->funcs->link_enc_unassign(state, streams[i]); + + /* (a) Assign DIG link encoders to physical (unmappable) endpoints first. */ + for (i = 0; i < stream_count; i++) { + struct dc_stream_state *stream = streams[i]; + + /* Skip stream if not supported by DIG link encoder. */ + if (!is_dig_link_enc_stream(stream)) + continue; + + /* Physical endpoints have a fixed mapping to DIG link encoders. */ + if (!stream->link->is_dig_mapping_flexible) { + eng_id = stream->link->eng_id; + update_link_enc_assignment(state, stream, eng_id, true); + } + } + + /* (b) Then assign encoders to mappable endpoints. */ + eng_id = ENGINE_ID_UNKNOWN; + + for (i = 0; i < stream_count; i++) { + struct dc_stream_state *stream = streams[i]; + + /* Skip stream if not supported by DIG link encoder. */ + if (!is_dig_link_enc_stream(stream)) + continue; + + /* Mappable endpoints have a flexible mapping to DIG link encoders. */ + if (stream->link->is_dig_mapping_flexible) { + eng_id = find_first_avail_link_enc(stream->ctx, state); + update_link_enc_assignment(state, stream, eng_id, true); + } + } +} + +void link_enc_cfg_link_enc_unassign( + struct dc_state *state, + struct dc_stream_state *stream) +{ + enum engine_id eng_id = ENGINE_ID_UNKNOWN; + + /* Only DIG link encoders. */ + if (!is_dig_link_enc_stream(stream)) + return; + + if (stream->link_enc) + eng_id = stream->link_enc->preferred_engine; + + update_link_enc_assignment(state, stream, eng_id, false); +} + +bool link_enc_cfg_is_transmitter_mappable( + struct dc_state *state, + struct link_encoder *link_enc) +{ + bool is_mappable = false; + enum engine_id eng_id = link_enc->preferred_engine; + struct dc_stream_state *stream = get_stream_using_link_enc(state, eng_id); + + if (stream) + is_mappable = stream->link->is_dig_mapping_flexible; + + return is_mappable; +} + +struct dc_link *link_enc_cfg_get_link_using_link_enc( + struct dc_state *state, + enum engine_id eng_id) +{ + struct dc_link *link = NULL; + int stream_idx = -1; + int i; + + for (i = 0; i < state->stream_count; i++) { + struct link_enc_assignment assignment = state->res_ctx.link_enc_assignments[i]; + + if (assignment.valid && (assignment.eng_id == eng_id)) { + stream_idx = i; + break; + } + } + + if (stream_idx != -1) + link = state->streams[stream_idx]->link; + else + dm_output_to_console("%s: No link using DIG(%d).\n", __func__, eng_id); + + return link; +} + +struct link_encoder *link_enc_cfg_get_link_enc_used_by_link( + struct dc_state *state, + struct dc_link *link) +{ + struct link_encoder *link_enc = NULL; + struct display_endpoint_id ep_id; + int stream_idx = -1; + int i; + + ep_id = (struct display_endpoint_id) { + .link_id = link->link_id, + .ep_type = link->ep_type}; + + for (i = 0; i < state->stream_count; i++) { + struct link_enc_assignment assignment = state->res_ctx.link_enc_assignments[i]; + + if (assignment.valid && + assignment.ep_id.link_id.id == ep_id.link_id.id && + assignment.ep_id.link_id.enum_id == ep_id.link_id.enum_id && + assignment.ep_id.link_id.type == ep_id.link_id.type && + assignment.ep_id.ep_type == ep_id.ep_type) { + stream_idx = i; + break; + } + } + + if (stream_idx != -1) + link_enc = state->streams[stream_idx]->link_enc; + else + dm_output_to_console("%s: No link encoder used by link(%d).\n", __func__, link->link_index); + + return link_enc; +} |