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 | 761 |
1 files changed, 761 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 0000000000..be5a6d008b --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_enc_cfg.c @@ -0,0 +1,761 @@ +/* Copyright 2021 Advanced Micro Devices, Inc. All rights reserved. + * + * 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 "link.h" + +#define DC_LOGGER dc->ctx->logger + +/* 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. */ + if (stream) { + 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]; + + /* Need to check link signal type rather than stream signal type which may not + * yet match. + */ + if (link_enc && ((uint32_t)stream->link->connector_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}; + + stream->ctx->dc->link_srv->dp_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; +} + +static struct link_enc_assignment get_assignment(struct dc *dc, int i) +{ + struct link_enc_assignment assignment; + + if (dc->current_state->res_ctx.link_enc_cfg_ctx.mode == LINK_ENC_CFG_TRANSIENT) + assignment = dc->current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i]; + else /* LINK_ENC_CFG_STEADY */ + assignment = dc->current_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + + return assignment; +} + +/* 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 i; + + for (i = 0; i < state->stream_count; i++) { + struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + + if ((assignment.valid == true) && (assignment.eng_id == eng_id)) { + stream = state->streams[i]; + break; + } + } + + return stream; +} + +static void remove_link_enc_assignment( + struct dc_state *state, + struct dc_stream_state *stream, + enum engine_id eng_id) +{ + int eng_idx; + int i; + + if (eng_id != ENGINE_ID_UNKNOWN) { + eng_idx = eng_id - ENGINE_ID_DIGA; + + /* stream ptr of stream in dc_state used to update correct entry in + * link_enc_assignments table. + */ + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + + if (assignment.valid && assignment.stream == stream) { + state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid = false; + /* Only add link encoder back to availability pool if not being + * used by any other stream (i.e. removing SST stream or last MST stream). + */ + if (get_stream_using_link_enc(state, eng_id) == NULL) + state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] = eng_id; + + stream->link_enc = NULL; + state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].eng_id = ENGINE_ID_UNKNOWN; + state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream = NULL; + dc_stream_release(stream); + break; + } + } + } +} + +static void add_link_enc_assignment( + struct dc_state *state, + struct dc_stream_state *stream, + enum engine_id eng_id) +{ + int eng_idx; + int i; + + if (eng_id != ENGINE_ID_UNKNOWN) { + eng_idx = eng_id - ENGINE_ID_DIGA; + + /* stream ptr 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]) { + state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i] = (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, + .stream = stream}; + dc_stream_retain(stream); + state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] = ENGINE_ID_UNKNOWN; + stream->link_enc = stream->ctx->dc->res_pool->link_encoders[eng_idx]; + break; + } + } + + /* Attempted to add an encoder assignment for a stream not in dc_state. */ + ASSERT(i != state->stream_count); + } +} + +/* Return first available DIG link encoder. */ +static enum engine_id find_first_avail_link_enc( + const struct dc_context *ctx, + const struct dc_state *state, + enum engine_id eng_id_requested) +{ + enum engine_id eng_id = ENGINE_ID_UNKNOWN; + int i; + + if (eng_id_requested != ENGINE_ID_UNKNOWN) { + + for (i = 0; i < ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) { + eng_id = state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i]; + if (eng_id == eng_id_requested) + return eng_id; + } + } + + eng_id = ENGINE_ID_UNKNOWN; + + for (i = 0; i < ctx->dc->res_pool->res_cap->num_dig_link_enc; i++) { + eng_id = state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i]; + if (eng_id != ENGINE_ID_UNKNOWN) + break; + } + + return eng_id; +} + +/* Check for availability of link encoder eng_id. */ +static bool is_avail_link_enc(struct dc_state *state, enum engine_id eng_id, struct dc_stream_state *stream) +{ + bool is_avail = false; + int eng_idx = eng_id - ENGINE_ID_DIGA; + + /* An encoder is available if it is still in the availability pool. */ + if (eng_id != ENGINE_ID_UNKNOWN && state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] != ENGINE_ID_UNKNOWN) { + is_avail = true; + } else { + struct dc_stream_state *stream_assigned = NULL; + + /* MST streams share the same link and should share the same encoder. + * If a stream that has already been assigned a link encoder uses as the + * same link as the stream checking for availability, it is an MST stream + * and should use the same link encoder. + */ + stream_assigned = get_stream_using_link_enc(state, eng_id); + if (stream_assigned && stream != stream_assigned && stream->link == stream_assigned->link) + is_avail = true; + } + + return is_avail; +} + +/* Test for display_endpoint_id equality. */ +static bool are_ep_ids_equal(struct display_endpoint_id *lhs, struct display_endpoint_id *rhs) +{ + bool are_equal = false; + + if (lhs->link_id.id == rhs->link_id.id && + lhs->link_id.enum_id == rhs->link_id.enum_id && + lhs->link_id.type == rhs->link_id.type && + lhs->ep_type == rhs->ep_type) + are_equal = true; + + return are_equal; +} + +static struct link_encoder *get_link_enc_used_by_link( + struct dc_state *state, + const struct dc_link *link) +{ + struct link_encoder *link_enc = NULL; + struct display_endpoint_id ep_id; + int i; + + ep_id = (struct display_endpoint_id) { + .link_id = link->link_id, + .ep_type = link->ep_type}; + + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + + if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id)) + link_enc = link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA]; + } + + return link_enc; +} +/* Clear all link encoder assignments. */ +static void clear_enc_assignments(const struct dc *dc, struct dc_state *state) +{ + int i; + + for (i = 0; i < MAX_PIPES; i++) { + state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid = false; + state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].eng_id = ENGINE_ID_UNKNOWN; + if (state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream != NULL) { + dc_stream_release(state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream); + state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream = NULL; + } + } + + 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_cfg_ctx.link_enc_avail[i] = (enum engine_id) i; + else + state->res_ctx.link_enc_cfg_ctx.link_enc_avail[i] = ENGINE_ID_UNKNOWN; + } +} + +void link_enc_cfg_init( + const struct dc *dc, + struct dc_state *state) +{ + clear_enc_assignments(dc, state); + + state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_STEADY; +} + +void link_enc_cfg_copy(const struct dc_state *src_ctx, struct dc_state *dst_ctx) +{ + memcpy(&dst_ctx->res_ctx.link_enc_cfg_ctx, + &src_ctx->res_ctx.link_enc_cfg_ctx, + sizeof(dst_ctx->res_ctx.link_enc_cfg_ctx)); +} + +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, eng_id_req = ENGINE_ID_UNKNOWN; + int i; + int j; + + ASSERT(state->stream_count == stream_count); + ASSERT(dc->current_state->res_ctx.link_enc_cfg_ctx.mode == LINK_ENC_CFG_STEADY); + + /* Release DIG link encoder resources before running assignment algorithm. */ + for (i = 0; i < dc->current_state->stream_count; i++) + dc->res_pool->funcs->link_enc_unassign(state, dc->current_state->streams[i]); + + for (i = 0; i < MAX_PIPES; i++) + ASSERT(state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].valid == false); + + /* (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 it if the link is mappable endpoint. */ + if (stream->link->is_dig_mapping_flexible) + continue; + + /* 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. */ + eng_id = stream->link->eng_id; + add_link_enc_assignment(state, stream, eng_id); + } + + /* (b) Retain previous assignments for mappable endpoints if encoders still available. */ + eng_id = ENGINE_ID_UNKNOWN; + + if (state != dc->current_state) { + struct dc_state *prev_state = dc->current_state; + + for (i = 0; i < stream_count; i++) { + struct dc_stream_state *stream = state->streams[i]; + + /* Skip it if the link is NOT mappable endpoint. */ + if (!stream->link->is_dig_mapping_flexible) + continue; + + /* Skip stream if not supported by DIG link encoder. */ + if (!is_dig_link_enc_stream(stream)) + continue; + + for (j = 0; j < prev_state->stream_count; j++) { + struct dc_stream_state *prev_stream = prev_state->streams[j]; + + if (stream == prev_stream && stream->link == prev_stream->link && + prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].valid) { + eng_id = prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].eng_id; + + if (is_avail_link_enc(state, eng_id, stream)) + add_link_enc_assignment(state, stream, eng_id); + } + } + } + } + + /* (c) Then assign encoders to remaining mappable endpoints. */ + eng_id = ENGINE_ID_UNKNOWN; + + for (i = 0; i < stream_count; i++) { + struct dc_stream_state *stream = streams[i]; + struct link_encoder *link_enc = NULL; + + /* Skip it if the link is NOT mappable endpoint. */ + if (!stream->link->is_dig_mapping_flexible) + continue; + + /* Skip if encoder assignment retained in step (b) above. */ + if (stream->link_enc) + continue; + + /* Skip stream if not supported by DIG link encoder. */ + if (!is_dig_link_enc_stream(stream)) { + ASSERT(stream->link->is_dig_mapping_flexible != true); + continue; + } + + /* Mappable endpoints have a flexible mapping to DIG link encoders. */ + + /* For MST, multiple streams will share the same link / display + * endpoint. These streams should use the same link encoder + * assigned to that endpoint. + */ + link_enc = get_link_enc_used_by_link(state, stream->link); + if (link_enc == NULL) { + + if (stream->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && + stream->link->dpia_preferred_eng_id != ENGINE_ID_UNKNOWN) + eng_id_req = stream->link->dpia_preferred_eng_id; + + eng_id = find_first_avail_link_enc(stream->ctx, state, eng_id_req); + } + else + eng_id = link_enc->preferred_engine; + + add_link_enc_assignment(state, stream, eng_id); + } + + link_enc_cfg_validate(dc, state); + + /* Update transient assignments. */ + for (i = 0; i < MAX_PIPES; i++) { + dc->current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i] = + state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + } + + /* Log encoder assignments. */ + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = + dc->current_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + + if (assignment.valid) + DC_LOG_DEBUG("%s: CUR %s(%d) - enc_id(%d)\n", + __func__, + assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? "PHY" : "DPIA", + assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? + assignment.ep_id.link_id.enum_id : + assignment.ep_id.link_id.enum_id - 1, + assignment.eng_id); + } + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = + state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + + if (assignment.valid) + DC_LOG_DEBUG("%s: NEW %s(%d) - enc_id(%d)\n", + __func__, + assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? "PHY" : "DPIA", + assignment.ep_id.ep_type == DISPLAY_ENDPOINT_PHY ? + assignment.ep_id.link_id.enum_id : + assignment.ep_id.link_id.enum_id - 1, + assignment.eng_id); + } + + /* Current state mode will be set to steady once this state committed. */ + state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_STEADY; +} + +void link_enc_cfg_link_enc_unassign( + struct dc_state *state, + struct dc_stream_state *stream) +{ + enum engine_id eng_id = ENGINE_ID_UNKNOWN; + + if (stream->link_enc) + eng_id = stream->link_enc->preferred_engine; + + remove_link_enc_assignment(state, stream, eng_id); +} + +bool link_enc_cfg_is_transmitter_mappable( + struct dc *dc, + struct link_encoder *link_enc) +{ + bool is_mappable = false; + enum engine_id eng_id = link_enc->preferred_engine; + struct dc_stream_state *stream = link_enc_cfg_get_stream_using_link_enc(dc, eng_id); + + if (stream) + is_mappable = stream->link->is_dig_mapping_flexible; + + return is_mappable; +} + +struct dc_stream_state *link_enc_cfg_get_stream_using_link_enc( + struct dc *dc, + enum engine_id eng_id) +{ + struct dc_stream_state *stream = NULL; + int i; + + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = get_assignment(dc, i); + + if ((assignment.valid == true) && (assignment.eng_id == eng_id)) { + stream = assignment.stream; + break; + } + } + + return stream; +} + +struct dc_link *link_enc_cfg_get_link_using_link_enc( + struct dc *dc, + enum engine_id eng_id) +{ + struct dc_link *link = NULL; + struct dc_stream_state *stream = NULL; + + stream = link_enc_cfg_get_stream_using_link_enc(dc, eng_id); + + if (stream) + link = stream->link; + + return link; +} + +struct link_encoder *link_enc_cfg_get_link_enc_used_by_link( + struct dc *dc, + const struct dc_link *link) +{ + struct link_encoder *link_enc = NULL; + struct display_endpoint_id ep_id; + int i; + + ep_id = (struct display_endpoint_id) { + .link_id = link->link_id, + .ep_type = link->ep_type}; + + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = get_assignment(dc, i); + + if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id)) { + link_enc = link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA]; + break; + } + } + + return link_enc; +} + +struct link_encoder *link_enc_cfg_get_next_avail_link_enc(struct dc *dc) +{ + struct link_encoder *link_enc = NULL; + enum engine_id encs_assigned[MAX_DIG_LINK_ENCODERS]; + int i; + + for (i = 0; i < MAX_DIG_LINK_ENCODERS; i++) + encs_assigned[i] = ENGINE_ID_UNKNOWN; + + /* Add assigned encoders to list. */ + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = get_assignment(dc, i); + + if (assignment.valid) + encs_assigned[assignment.eng_id - ENGINE_ID_DIGA] = assignment.eng_id; + } + + for (i = 0; i < dc->res_pool->res_cap->num_dig_link_enc; i++) { + if (encs_assigned[i] == ENGINE_ID_UNKNOWN && + dc->res_pool->link_encoders[i] != NULL) { + link_enc = dc->res_pool->link_encoders[i]; + break; + } + } + + return link_enc; +} + +struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream( + struct dc *dc, + const struct dc_stream_state *stream) +{ + struct link_encoder *link_enc; + + link_enc = link_enc_cfg_get_link_enc_used_by_link(dc, stream->link); + + return link_enc; +} + +struct link_encoder *link_enc_cfg_get_link_enc( + const struct dc_link *link) +{ + struct link_encoder *link_enc = NULL; + + /* Links supporting dynamically assigned link encoder will be assigned next + * available encoder if one not already assigned. + */ + if (link->is_dig_mapping_flexible && + link->dc->res_pool->funcs->link_encs_assign) { + link_enc = link_enc_cfg_get_link_enc_used_by_link(link->ctx->dc, link); + if (link_enc == NULL) + link_enc = link_enc_cfg_get_next_avail_link_enc( + link->ctx->dc); + } else + link_enc = link->link_enc; + + return link_enc; +} + +struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream_current( + struct dc *dc, + const struct dc_stream_state *stream) +{ + struct link_encoder *link_enc = NULL; + struct display_endpoint_id ep_id; + int i; + + ep_id = (struct display_endpoint_id) { + .link_id = stream->link->link_id, + .ep_type = stream->link->ep_type}; + + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = + dc->current_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + + if (assignment.valid == true && are_ep_ids_equal(&assignment.ep_id, &ep_id)) { + link_enc = stream->link->dc->res_pool->link_encoders[assignment.eng_id - ENGINE_ID_DIGA]; + break; + } + } + + return link_enc; +} + +bool link_enc_cfg_is_link_enc_avail(struct dc *dc, enum engine_id eng_id, struct dc_link *link) +{ + bool is_avail = true; + int i; + + /* An encoder is not available if it has already been assigned to a different endpoint. */ + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = get_assignment(dc, i); + struct display_endpoint_id ep_id = (struct display_endpoint_id) { + .link_id = link->link_id, + .ep_type = link->ep_type}; + + if (assignment.valid && assignment.eng_id == eng_id && !are_ep_ids_equal(&ep_id, &assignment.ep_id)) { + is_avail = false; + break; + } + } + + return is_avail; +} + +bool link_enc_cfg_validate(struct dc *dc, struct dc_state *state) +{ + bool is_valid = false; + bool valid_entries = true; + bool valid_stream_ptrs = true; + bool valid_uniqueness = true; + bool valid_avail = true; + bool valid_streams = true; + int i, j; + uint8_t valid_count = 0; + uint8_t dig_stream_count = 0; + int eng_ids_per_ep_id[MAX_PIPES] = {0}; + int ep_ids_per_eng_id[MAX_PIPES] = {0}; + int valid_bitmap = 0; + + /* (1) No. valid entries same as stream count. */ + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + + if (assignment.valid) + valid_count++; + + if (is_dig_link_enc_stream(state->streams[i])) + dig_stream_count++; + } + if (valid_count != dig_stream_count) + valid_entries = false; + + /* (2) Matching stream ptrs. */ + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + + if (assignment.valid) { + if (assignment.stream != state->streams[i]) + valid_stream_ptrs = false; + } + } + + /* (3) Each endpoint assigned unique encoder. */ + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment_i = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + + if (assignment_i.valid) { + struct display_endpoint_id ep_id_i = assignment_i.ep_id; + + eng_ids_per_ep_id[i]++; + ep_ids_per_eng_id[i]++; + for (j = 0; j < MAX_PIPES; j++) { + struct link_enc_assignment assignment_j = + state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j]; + + if (j == i) + continue; + + if (assignment_j.valid) { + struct display_endpoint_id ep_id_j = assignment_j.ep_id; + + if (are_ep_ids_equal(&ep_id_i, &ep_id_j) && + assignment_i.eng_id != assignment_j.eng_id) { + valid_uniqueness = false; + eng_ids_per_ep_id[i]++; + } else if (!are_ep_ids_equal(&ep_id_i, &ep_id_j) && + assignment_i.eng_id == assignment_j.eng_id) { + valid_uniqueness = false; + ep_ids_per_eng_id[i]++; + } + } + } + } + } + + /* (4) Assigned encoders not in available pool. */ + for (i = 0; i < MAX_PIPES; i++) { + struct link_enc_assignment assignment = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i]; + + if (assignment.valid) { + for (j = 0; j < dc->res_pool->res_cap->num_dig_link_enc; j++) { + if (state->res_ctx.link_enc_cfg_ctx.link_enc_avail[j] == assignment.eng_id) { + valid_avail = false; + break; + } + } + } + } + + /* (5) All streams have valid link encoders. */ + for (i = 0; i < state->stream_count; i++) { + struct dc_stream_state *stream = state->streams[i]; + + if (is_dig_link_enc_stream(stream) && stream->link_enc == NULL) { + valid_streams = false; + break; + } + } + + is_valid = valid_entries && valid_stream_ptrs && valid_uniqueness && valid_avail && valid_streams; + ASSERT(is_valid); + + if (is_valid == false) { + valid_bitmap = + (valid_entries & 0x1) | + ((valid_stream_ptrs & 0x1) << 1) | + ((valid_uniqueness & 0x1) << 2) | + ((valid_avail & 0x1) << 3) | + ((valid_streams & 0x1) << 4); + DC_LOG_ERROR("%s: Invalid link encoder assignments - 0x%x\n", __func__, valid_bitmap); + } + + return is_valid; +} + +void link_enc_cfg_set_transient_mode(struct dc *dc, struct dc_state *current_state, struct dc_state *new_state) +{ + int i = 0; + int num_transient_assignments = 0; + + for (i = 0; i < MAX_PIPES; i++) { + if (current_state->res_ctx.link_enc_cfg_ctx.transient_assignments[i].valid) + num_transient_assignments++; + } + + /* Only enter transient mode if the new encoder assignments are valid. */ + if (new_state->stream_count == num_transient_assignments) { + current_state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_TRANSIENT; + DC_LOG_DEBUG("%s: current_state(%p) mode(%d)\n", __func__, current_state, LINK_ENC_CFG_TRANSIENT); + } +} |