diff options
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/Makefile | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link.c | 16 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_enc_cfg.c | 204 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_link.h | 10 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_stream.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_types.h | 15 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/inc/core_types.h | 27 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h | 13 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h | 68 |
11 files changed, 366 insertions, 7 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/Makefile b/drivers/gpu/drm/amd/display/dc/Makefile index bbde6e6a4e43..f33847299bca 100644 --- a/drivers/gpu/drm/amd/display/dc/Makefile +++ b/drivers/gpu/drm/amd/display/dc/Makefile @@ -54,8 +54,9 @@ AMD_DC = $(addsuffix /Makefile, $(addprefix $(FULL_AMD_DISPLAY_PATH)/dc/,$(DC_LI include $(AMD_DC) -DISPLAY_CORE = dc.o dc_stat.o dc_link.o dc_resource.o dc_hw_sequencer.o dc_sink.o \ -dc_surface.o dc_link_hwss.o dc_link_dp.o dc_link_ddc.o dc_debug.o dc_stream.o +DISPLAY_CORE = dc.o dc_link.o dc_resource.o dc_hw_sequencer.o dc_sink.o \ +dc_surface.o dc_link_hwss.o dc_link_dp.o dc_link_ddc.o dc_debug.o dc_stream.o \ +dc_link_enc_cfg.o ifdef CONFIG_DRM_AMD_DC_DCN DISPLAY_CORE += dc_vm_helper.o diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index d55c1dd6464c..12cb95c5a1f9 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -52,6 +52,7 @@ #include "link_hwss.h" #include "link_encoder.h" +#include "link_enc_cfg.h" #include "dc_link_ddc.h" #include "dm_helpers.h" @@ -870,6 +871,9 @@ static bool dc_construct(struct dc *dc, if (!create_links(dc, init_params->num_virtual_links)) goto fail; + /* Initialise DIG link encoder resource tracking variables. */ + link_enc_cfg_init(dc, dc->current_state); + return true; fail: diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 2cfb53387c55..719fc6b502b6 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -92,11 +92,14 @@ static void dc_link_destruct(struct dc_link *link) link->panel_cntl->funcs->destroy(&link->panel_cntl); if (link->link_enc) { - /* Update link encoder tracking variables. These are used for the dynamic - * assignment of link encoders to streams. + /* Update link encoder resource tracking variables. These are used for + * the dynamic assignment of link encoders to streams. Virtual links + * are not assigned encoder resources on creation. */ - link->dc->res_pool->link_encoders[link->link_enc->preferred_engine] = NULL; - link->dc->res_pool->dig_link_enc_count--; + if (link->link_id.id != CONNECTOR_ID_VIRTUAL) { + link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = NULL; + link->dc->res_pool->dig_link_enc_count--; + } link->link_enc->funcs->destroy(&link->link_enc); } @@ -1409,6 +1412,8 @@ static bool dc_link_construct(struct dc_link *link, link->link_id = bios->funcs->get_connector_id(bios, init_params->connector_index); + link->ep_type = DISPLAY_ENDPOINT_PHY; + DC_LOG_DC("BIOS object table - link_id: %d", link->link_id.id); if (bios->funcs->get_disp_connector_caps_info) { @@ -1547,7 +1552,8 @@ static bool dc_link_construct(struct dc_link *link, /* Update link encoder tracking variables. These are used for the dynamic * assignment of link encoders to streams. */ - link->dc->res_pool->link_encoders[link->link_enc->preferred_engine] = link->link_enc; + link->eng_id = link->link_enc->preferred_engine; + link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = link->link_enc; link->dc->res_pool->dig_link_enc_count++; link->link_enc_hw_inst = link->link_enc->transmitter; 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..c2bf9e5d9675 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_enc_cfg.c @@ -0,0 +1,204 @@ +/* + * 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; +} + +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); +} diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c index 3c91d16c2710..ac7a75887f95 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c @@ -1930,6 +1930,9 @@ enum dc_status dc_remove_stream_from_ctx( dc->res_pool, del_pipe->stream_res.stream_enc, false); + /* Release link encoder from stream in new dc_state. */ + if (dc->res_pool->funcs->link_enc_unassign) + dc->res_pool->funcs->link_enc_unassign(new_ctx, del_pipe->stream); if (del_pipe->stream_res.audio) update_audio_usage( @@ -2842,6 +2845,10 @@ bool pipe_need_reprogram( if (pipe_ctx_old->stream_res.dsc != pipe_ctx->stream_res.dsc) return true; + /* DIG link encoder resource assignment for stream changed. */ + if (pipe_ctx_old->stream->link_enc != pipe_ctx->stream->link_enc) + return true; + return false; } diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h index 7b927e634279..b0013e674864 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_link.h +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -132,6 +132,11 @@ struct dc_link { uint8_t hpd_src; uint8_t link_enc_hw_inst; + /* DIG link encoder ID. Used as index in link encoder resource pool. + * For links with fixed mapping to DIG, this is not changed after dc_link + * object creation. + */ + enum engine_id eng_id; bool test_pattern_enabled; union compliance_test_state compliance_test_state; @@ -151,6 +156,11 @@ struct dc_link { struct panel_cntl *panel_cntl; struct link_encoder *link_enc; struct graphics_object_id link_id; + /* Endpoint type distinguishes display endpoints which do not have entries + * in the BIOS connector table from those that do. Helps when tracking link + * encoder to display endpoint assignments. + */ + enum display_endpoint_type ep_type; union ddi_channel_mapping ddi_channel_mapping; struct connector_device_tag_info device_tag; struct dpcd_caps dpcd_caps; diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h index e747370fc43b..2bc057e0b447 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_stream.h +++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h @@ -136,6 +136,10 @@ struct dc_stream_state { struct dc_sink *sink; struct dc_link *link; + /* For dynamic link encoder assignment, update the link encoder assigned to + * a stream via the volatile dc_state rather than the static dc_link. + */ + struct link_encoder *link_enc; struct dc_panel_patch sink_patches; union display_content_support content_support; struct dc_crtc_timing timing; diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h index 80757a0ea7c6..b5e875ee9027 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_types.h @@ -934,4 +934,19 @@ enum dc_psr_version { DC_PSR_VERSION_UNSUPPORTED = 0xFFFFFFFF, }; +/* Possible values of display_endpoint_id.endpoint */ +enum display_endpoint_type { + DISPLAY_ENDPOINT_PHY = 0, /* Physical connector. */ + DISPLAY_ENDPOINT_UNKNOWN = -1 +}; + +/* Extends graphics_object_id with an additional member 'ep_type' for + * distinguishing between physical endpoints (with entries in BIOS connector table) and + * logical endpoints. + */ +struct display_endpoint_id { + struct graphics_object_id link_id; + enum display_endpoint_type ep_type; +}; + #endif /* DC_TYPES_H_ */ diff --git a/drivers/gpu/drm/amd/display/dc/inc/core_types.h b/drivers/gpu/drm/amd/display/dc/inc/core_types.h index eb1a19bf0d81..81b92f20d5b6 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/core_types.h +++ b/drivers/gpu/drm/amd/display/dc/inc/core_types.h @@ -118,6 +118,27 @@ struct resource_funcs { display_e2e_pipe_params_st *pipes, bool fast_validate); + /* + * Algorithm for assigning available link encoders to links. + * + * Update link_enc_assignments table and link_enc_avail list accordingly in + * struct resource_context. + */ + void (*link_encs_assign)( + struct dc *dc, + struct dc_state *state, + struct dc_stream_state *streams[], + uint8_t stream_count); + /* + * Unassign a link encoder from a stream. + * + * Update link_enc_assignments table and link_enc_avail list accordingly in + * struct resource_context. + */ + void (*link_enc_unassign)( + struct dc_state *state, + struct dc_stream_state *stream); + enum dc_status (*validate_global)( struct dc *dc, struct dc_state *context); @@ -358,6 +379,12 @@ struct resource_context { uint8_t clock_source_ref_count[MAX_CLOCK_SOURCES]; uint8_t dp_clock_source_ref_count; bool is_dsc_acquired[MAX_PIPES]; + /* A table/array of encoder-to-link assignments. One entry per stream. + * Indexed by stream index in dc_state. + */ + struct link_enc_assignment link_enc_assignments[MAX_PIPES]; + /* List of available link encoders. Uses engine ID as encoder identifier. */ + enum engine_id link_enc_avail[MAX_DIG_LINK_ENCODERS]; #if defined(CONFIG_DRM_AMD_DC_DCN) bool is_mpc_3dlut_acquired[MAX_PIPES]; #endif diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h b/drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h index 7f5acd8fb918..80bc99500645 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h +++ b/drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h @@ -187,4 +187,17 @@ struct link_encoder_funcs { struct link_encoder *enc); }; +/* + * Used to track assignments of links (display endpoints) to link encoders. + * + * Entry in link_enc_assignments table in struct resource_context. + * Entries only marked valid once encoder assigned to a link and invalidated once unassigned. + * Uses engine ID as identifier since PHY ID not relevant for USB4 DPIA endpoint. + */ +struct link_enc_assignment { + bool valid; + struct display_endpoint_id ep_id; + enum engine_id eng_id; +}; + #endif /* LINK_ENCODER_H_ */ diff --git a/drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h b/drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h new file mode 100644 index 000000000000..ad641632eadd --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h @@ -0,0 +1,68 @@ +/* + * 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 + * + */ + +#ifndef DC_INC_LINK_ENC_CFG_H_ +#define DC_INC_LINK_ENC_CFG_H_ + +/* This module implements functionality for dynamically assigning DIG link + * encoder resources to display endpoints (links). + */ + +#include "core_types.h" + +/* + * Initialise link encoder resource tracking. + */ +void link_enc_cfg_init( + struct dc *dc, + struct dc_state *state); + +/* + * Algorithm for assigning available DIG link encoders to streams. + * + * Update link_enc_assignments table and link_enc_avail list accordingly in + * struct resource_context. + * + * Loop over all streams twice: + * a) First assign encoders to unmappable endpoints. + * b) Then assign encoders to mappable endpoints. + */ +void link_enc_cfg_link_encs_assign( + struct dc *dc, + struct dc_state *state, + struct dc_stream_state *streams[], + uint8_t stream_count); + +/* + * Unassign a link encoder from a stream. + * + * Update link_enc_assignments table and link_enc_avail list accordingly in + * struct resource_context. + */ +void link_enc_cfg_link_enc_unassign( + struct dc_state *state, + struct dc_stream_state *stream); + +#endif /* DC_INC_LINK_ENC_CFG_H_ */ |