From: Wenjing Liu Date: Tue, 13 Dec 2022 22:26:13 +0000 (-0500) Subject: drm/amd/display: move dpcd logic from dc_link_dpcd to link_dpcd X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a28d0bac0956c12c17c166cfd9c3655c006426a8;p=linux.git drm/amd/display: move dpcd logic from dc_link_dpcd to link_dpcd [why] Moving dpcd logic from dc_link_dpcd to link_dpcd as part of link file restructure Tested-by: Daniel Wheeler Reviewed-by: George Shen Acked-by: Rodrigo Siqueira Signed-off-by: Wenjing Liu Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/Makefile b/drivers/gpu/drm/amd/display/dc/Makefile index 4438f3c16636b..c5b7bcba5a3d5 100644 --- a/drivers/gpu/drm/amd/display/dc/Makefile +++ b/drivers/gpu/drm/amd/display/dc/Makefile @@ -66,7 +66,7 @@ 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_dp.o dc_debug.o dc_stream.o \ -dc_link_enc_cfg.o dc_link_dpia.o dc_link_dpcd.o +dc_link_enc_cfg.o dc_link_dpia.o DISPLAY_CORE += dc_vm_helper.o 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 b5572f5202ca5..b20dde4b05d54 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -51,7 +51,7 @@ #include "dmub/dmub_srv.h" #include "inc/hw/panel_cntl.h" #include "inc/link_enc_cfg.h" -#include "inc/link_dpcd.h" +#include "link/link_dpcd.h" #include "link/link_dp_trace.h" #include "link/link_hpd.h" diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 815652da41265..9f2f10a957f6e 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -50,7 +50,7 @@ static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA"; link->ctx->logger #define DC_TRACE_LEVEL_MESSAGE(...) /* do nothing */ -#include "link_dpcd.h" +#include "link/link_dpcd.h" #ifndef MAX #define MAX(X, Y) ((X) > (Y) ? (X) : (Y)) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c deleted file mode 100644 index af110bf9470fa..0000000000000 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c +++ /dev/null @@ -1,246 +0,0 @@ -/* - * 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 -#include -#include -#include -#include -#include -#include "dm_helpers.h" - -#define END_ADDRESS(start, size) (start + size - 1) -#define ADDRESS_RANGE_SIZE(start, end) (end - start + 1) -struct dpcd_address_range { - uint32_t start; - uint32_t end; -}; - -static enum dc_status internal_link_read_dpcd( - struct dc_link *link, - uint32_t address, - uint8_t *data, - uint32_t size) -{ - if (!link->aux_access_disabled && - !dm_helpers_dp_read_dpcd(link->ctx, - link, address, data, size)) { - return DC_ERROR_UNEXPECTED; - } - - return DC_OK; -} - -static enum dc_status internal_link_write_dpcd( - struct dc_link *link, - uint32_t address, - const uint8_t *data, - uint32_t size) -{ - if (!link->aux_access_disabled && - !dm_helpers_dp_write_dpcd(link->ctx, - link, address, data, size)) { - return DC_ERROR_UNEXPECTED; - } - - return DC_OK; -} - -/* - * Partition the entire DPCD address space - * XXX: This partitioning must cover the entire DPCD address space, - * and must contain no gaps or overlapping address ranges. - */ -static const struct dpcd_address_range mandatory_dpcd_partitions[] = { - { 0, DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR1) - 1}, - { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR1), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR2) - 1 }, - { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR2), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR3) - 1 }, - { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR3), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR4) - 1 }, - { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR4), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR5) - 1 }, - { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR5), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR6) - 1 }, - { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR6), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR7) - 1 }, - { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR7), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR8) - 1 }, - { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR8), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR1) - 1 }, - /* - * The FEC registers are contiguous - */ - { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR1), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR1) - 1 }, - { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR2), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR2) - 1 }, - { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR3), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR3) - 1 }, - { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR4), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR4) - 1 }, - { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR5), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR5) - 1 }, - { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR6), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR6) - 1 }, - { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR7), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR7) - 1 }, - { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR8), DP_LTTPR_MAX_ADD }, - /* all remaining DPCD addresses */ - { DP_LTTPR_MAX_ADD + 1, DP_DPCD_MAX_ADD } }; - -static inline bool do_addresses_intersect_with_range( - const struct dpcd_address_range *range, - const uint32_t start_address, - const uint32_t end_address) -{ - return start_address <= range->end && end_address >= range->start; -} - -static uint32_t dpcd_get_next_partition_size(const uint32_t address, const uint32_t size) -{ - const uint32_t end_address = END_ADDRESS(address, size); - uint32_t partition_iterator = 0; - - /* - * find current partition - * this loop spins forever if partition map above is not surjective - */ - while (!do_addresses_intersect_with_range(&mandatory_dpcd_partitions[partition_iterator], - address, end_address)) - partition_iterator++; - if (end_address < mandatory_dpcd_partitions[partition_iterator].end) - return size; - return ADDRESS_RANGE_SIZE(address, mandatory_dpcd_partitions[partition_iterator].end); -} - -/* - * Ranges of DPCD addresses that must be read in a single transaction - * XXX: Do not allow any two address ranges in this array to overlap - */ -static const struct dpcd_address_range mandatory_dpcd_blocks[] = { - { DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV, DP_PHY_REPEATER_EXTENDED_WAIT_TIMEOUT }}; - -/* - * extend addresses to read all mandatory blocks together - */ -static void dpcd_extend_address_range( - const uint32_t in_address, - uint8_t * const in_data, - const uint32_t in_size, - uint32_t *out_address, - uint8_t **out_data, - uint32_t *out_size) -{ - const uint32_t end_address = END_ADDRESS(in_address, in_size); - const struct dpcd_address_range *addr_range; - struct dpcd_address_range new_addr_range; - uint32_t i; - - new_addr_range.start = in_address; - new_addr_range.end = end_address; - for (i = 0; i < ARRAY_SIZE(mandatory_dpcd_blocks); i++) { - addr_range = &mandatory_dpcd_blocks[i]; - if (addr_range->start <= in_address && addr_range->end >= in_address) - new_addr_range.start = addr_range->start; - - if (addr_range->start <= end_address && addr_range->end >= end_address) - new_addr_range.end = addr_range->end; - } - *out_address = in_address; - *out_size = in_size; - *out_data = in_data; - if (new_addr_range.start != in_address || new_addr_range.end != end_address) { - *out_address = new_addr_range.start; - *out_size = ADDRESS_RANGE_SIZE(new_addr_range.start, new_addr_range.end); - *out_data = kzalloc(*out_size * sizeof(**out_data), GFP_KERNEL); - } -} - -/* - * Reduce the AUX reply down to the values the caller requested - */ -static void dpcd_reduce_address_range( - const uint32_t extended_address, - uint8_t * const extended_data, - const uint32_t extended_size, - const uint32_t reduced_address, - uint8_t * const reduced_data, - const uint32_t reduced_size) -{ - const uint32_t offset = reduced_address - extended_address; - - /* - * If the address is same, address was not extended. - * So we do not need to free any memory. - * The data is in original buffer(reduced_data). - */ - if (extended_data == reduced_data) - return; - - memcpy(&extended_data[offset], reduced_data, reduced_size); - kfree(extended_data); -} - -enum dc_status core_link_read_dpcd( - struct dc_link *link, - uint32_t address, - uint8_t *data, - uint32_t size) -{ - uint32_t extended_address; - uint32_t partitioned_address; - uint8_t *extended_data; - uint32_t extended_size; - /* size of the remaining partitioned address space */ - uint32_t size_left_to_read; - enum dc_status status; - /* size of the next partition to be read from */ - uint32_t partition_size; - uint32_t data_index = 0; - - dpcd_extend_address_range(address, data, size, &extended_address, &extended_data, &extended_size); - partitioned_address = extended_address; - size_left_to_read = extended_size; - while (size_left_to_read) { - partition_size = dpcd_get_next_partition_size(partitioned_address, size_left_to_read); - status = internal_link_read_dpcd(link, partitioned_address, &extended_data[data_index], partition_size); - if (status != DC_OK) - break; - partitioned_address += partition_size; - data_index += partition_size; - size_left_to_read -= partition_size; - } - dpcd_reduce_address_range(extended_address, extended_data, extended_size, address, data, size); - return status; -} - -enum dc_status core_link_write_dpcd( - struct dc_link *link, - uint32_t address, - const uint8_t *data, - uint32_t size) -{ - uint32_t partition_size; - uint32_t data_index = 0; - enum dc_status status; - - while (size) { - partition_size = dpcd_get_next_partition_size(address, size); - status = internal_link_write_dpcd(link, address, &data[data_index], partition_size); - if (status != DC_OK) - break; - address += partition_size; - data_index += partition_size; - size -= partition_size; - } - return status; -} diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c index d130d58ac08e7..e1db05966d83e 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c @@ -33,7 +33,7 @@ #include "link_hwss.h" #include "dm_helpers.h" #include "dmub/inc/dmub_cmd.h" -#include "inc/link_dpcd.h" +#include "link/link_dpcd.h" #include "dc_dmub_srv.h" #define DC_LOGGER \ diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c index 358431f0d98ad..833a1c37cbe49 100644 --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c @@ -55,7 +55,6 @@ #include "audio.h" #include "reg_helper.h" #include "panel_cntl.h" -#include "inc/link_dpcd.h" #include "dpcd_defs.h" /* include DCE11 register header files */ #include "dce/dce_11_0_d.h" diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c index fe2023f18b7d0..c1d4e66b413f1 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c @@ -57,7 +57,6 @@ #include "dc_trace.h" #include "dce/dmub_outbox.h" #include "inc/dc_link_dp.h" -#include "inc/link_dpcd.h" #define DC_LOGGER_INIT(logger) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c index 484e7cdf00b8c..1527c3b4fb197 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c @@ -28,7 +28,7 @@ #include "dcn10_stream_encoder.h" #include "reg_helper.h" #include "hw_shared.h" -#include "inc/link_dpcd.h" +#include "dc_link_dp.h" #include "dpcd_defs.h" #include "dcn30/dcn30_afmt.h" diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c index 20c85ef2a957f..c2066a5057e81 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c @@ -52,7 +52,6 @@ #include "dc_dmub_srv.h" #include "dce/dmub_hw_lock_mgr.h" #include "hw_sequencer.h" -#include "inc/link_dpcd.h" #include "dpcd_defs.h" #include "inc/link_enc_cfg.h" #include "link_hwss.h" diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.c index b40489e678f90..cacf3f5298b09 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.c @@ -29,7 +29,7 @@ #include "dcn20_stream_encoder.h" #include "reg_helper.h" #include "hw_shared.h" -#include "inc/link_dpcd.h" +#include "dc_link_dp.h" #include "dpcd_defs.h" #define DC_LOGGER \ diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c index 8c50457112649..7360b3ce4283c 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c @@ -51,7 +51,6 @@ #include "../dcn20/dcn20_hwseq.h" #include "dcn30_resource.h" #include "inc/dc_link_dp.h" -#include "inc/link_dpcd.h" diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c index 165c920ca7766..3b354f0db2a56 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c @@ -46,7 +46,6 @@ #include "dpcd_defs.h" #include "dce/dmub_outbox.h" #include "dc_link_dp.h" -#include "inc/link_dpcd.h" #include "dcn10/dcn10_hw_sequencer.h" #include "inc/link_enc_cfg.h" #include "dcn30/dcn30_vpg.h" diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dio_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dio_stream_encoder.c index 0926db0183383..9c9875368beac 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dio_stream_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dio_stream_encoder.c @@ -30,7 +30,7 @@ #include "dcn314_dio_stream_encoder.h" #include "reg_helper.h" #include "hw_shared.h" -#include "inc/link_dpcd.h" +#include "dc_link_dp.h" #include "dpcd_defs.h" #define DC_LOGGER \ diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_hwseq.c index a0741794db62a..edc2c08939b07 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_hwseq.c @@ -48,7 +48,6 @@ #include "dce/dmub_outbox.h" #include "dc_link_dp.h" #include "inc/dc_link_dp.h" -#include "inc/link_dpcd.h" #include "dcn10/dcn10_hw_sequencer.h" #include "inc/link_enc_cfg.h" #include "dcn30/dcn30_vpg.h" diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dio_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dio_stream_encoder.c index 7d09c62a405ae..f01968f6d1826 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dio_stream_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dio_stream_encoder.c @@ -29,7 +29,7 @@ #include "dcn32_dio_stream_encoder.h" #include "reg_helper.h" #include "hw_shared.h" -#include "inc/link_dpcd.h" +#include "dc_link_dp.h" #include "dpcd_defs.h" #define DC_LOGGER \ diff --git a/drivers/gpu/drm/amd/display/dc/hdcp/hdcp_msg.c b/drivers/gpu/drm/amd/display/dc/hdcp/hdcp_msg.c index 6c4b47f90d499..906a43e85f6db 100644 --- a/drivers/gpu/drm/amd/display/dc/hdcp/hdcp_msg.c +++ b/drivers/gpu/drm/amd/display/dc/hdcp/hdcp_msg.c @@ -32,7 +32,7 @@ #include "core_types.h" #include "link.h" #include "link_hwss.h" -#include "inc/link_dpcd.h" +#include "link/link_dpcd.h" #define DC_LOGGER \ link->ctx->logger diff --git a/drivers/gpu/drm/amd/display/dc/inc/link_dpcd.h b/drivers/gpu/drm/amd/display/dc/inc/link_dpcd.h deleted file mode 100644 index d561f86d503ce..0000000000000 --- a/drivers/gpu/drm/amd/display/dc/inc/link_dpcd.h +++ /dev/null @@ -1,43 +0,0 @@ -/* - * 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 __LINK_DPCD_H__ -#define __LINK_DPCD_H__ -#include -#include -#include - -enum dc_status core_link_read_dpcd( - struct dc_link *link, - uint32_t address, - uint8_t *data, - uint32_t size); - -enum dc_status core_link_write_dpcd( - struct dc_link *link, - uint32_t address, - const uint8_t *data, - uint32_t size); -#endif diff --git a/drivers/gpu/drm/amd/display/dc/link/Makefile b/drivers/gpu/drm/amd/display/dc/link/Makefile index d1b1bb3c53525..b905c53e738bd 100644 --- a/drivers/gpu/drm/amd/display/dc/link/Makefile +++ b/drivers/gpu/drm/amd/display/dc/link/Makefile @@ -24,7 +24,7 @@ # PHY, HPD, DDC and etc). LINK = link_hwss_dio.o link_hwss_dpia.o link_hwss_hpo_dp.o link_dp_trace.o \ -link_hpd.o link_ddc.o +link_hpd.o link_ddc.o link_dpcd.o AMD_DAL_LINK = $(addprefix $(AMDDALPATH)/dc/link/,$(LINK)) diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpcd.c b/drivers/gpu/drm/amd/display/dc/link/link_dpcd.c new file mode 100644 index 0000000000000..5c9a30211c109 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/link/link_dpcd.c @@ -0,0 +1,249 @@ +/* + * 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 + * + */ + +/* FILE POLICY AND INTENDED USAGE: + * + * This file implements basic dpcd read/write functionality. It also does basic + * dpcd range check to ensure that every dpcd request is compliant with specs + * range requirements. + */ + +#include "link_dpcd.h" +#include +#include "dm_helpers.h" + +#define END_ADDRESS(start, size) (start + size - 1) +#define ADDRESS_RANGE_SIZE(start, end) (end - start + 1) +struct dpcd_address_range { + uint32_t start; + uint32_t end; +}; + +static enum dc_status internal_link_read_dpcd( + struct dc_link *link, + uint32_t address, + uint8_t *data, + uint32_t size) +{ + if (!link->aux_access_disabled && + !dm_helpers_dp_read_dpcd(link->ctx, + link, address, data, size)) { + return DC_ERROR_UNEXPECTED; + } + + return DC_OK; +} + +static enum dc_status internal_link_write_dpcd( + struct dc_link *link, + uint32_t address, + const uint8_t *data, + uint32_t size) +{ + if (!link->aux_access_disabled && + !dm_helpers_dp_write_dpcd(link->ctx, + link, address, data, size)) { + return DC_ERROR_UNEXPECTED; + } + + return DC_OK; +} + +/* + * Partition the entire DPCD address space + * XXX: This partitioning must cover the entire DPCD address space, + * and must contain no gaps or overlapping address ranges. + */ +static const struct dpcd_address_range mandatory_dpcd_partitions[] = { + { 0, DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR1) - 1}, + { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR1), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR2) - 1 }, + { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR2), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR3) - 1 }, + { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR3), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR4) - 1 }, + { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR4), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR5) - 1 }, + { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR5), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR6) - 1 }, + { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR6), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR7) - 1 }, + { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR7), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR8) - 1 }, + { DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR8), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR1) - 1 }, + /* + * The FEC registers are contiguous + */ + { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR1), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR1) - 1 }, + { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR2), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR2) - 1 }, + { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR3), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR3) - 1 }, + { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR4), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR4) - 1 }, + { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR5), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR5) - 1 }, + { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR6), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR6) - 1 }, + { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR7), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR7) - 1 }, + { DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR8), DP_LTTPR_MAX_ADD }, + /* all remaining DPCD addresses */ + { DP_LTTPR_MAX_ADD + 1, DP_DPCD_MAX_ADD } }; + +static inline bool do_addresses_intersect_with_range( + const struct dpcd_address_range *range, + const uint32_t start_address, + const uint32_t end_address) +{ + return start_address <= range->end && end_address >= range->start; +} + +static uint32_t dpcd_get_next_partition_size(const uint32_t address, const uint32_t size) +{ + const uint32_t end_address = END_ADDRESS(address, size); + uint32_t partition_iterator = 0; + + /* + * find current partition + * this loop spins forever if partition map above is not surjective + */ + while (!do_addresses_intersect_with_range(&mandatory_dpcd_partitions[partition_iterator], + address, end_address)) + partition_iterator++; + if (end_address < mandatory_dpcd_partitions[partition_iterator].end) + return size; + return ADDRESS_RANGE_SIZE(address, mandatory_dpcd_partitions[partition_iterator].end); +} + +/* + * Ranges of DPCD addresses that must be read in a single transaction + * XXX: Do not allow any two address ranges in this array to overlap + */ +static const struct dpcd_address_range mandatory_dpcd_blocks[] = { + { DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV, DP_PHY_REPEATER_EXTENDED_WAIT_TIMEOUT }}; + +/* + * extend addresses to read all mandatory blocks together + */ +static void dpcd_extend_address_range( + const uint32_t in_address, + uint8_t * const in_data, + const uint32_t in_size, + uint32_t *out_address, + uint8_t **out_data, + uint32_t *out_size) +{ + const uint32_t end_address = END_ADDRESS(in_address, in_size); + const struct dpcd_address_range *addr_range; + struct dpcd_address_range new_addr_range; + uint32_t i; + + new_addr_range.start = in_address; + new_addr_range.end = end_address; + for (i = 0; i < ARRAY_SIZE(mandatory_dpcd_blocks); i++) { + addr_range = &mandatory_dpcd_blocks[i]; + if (addr_range->start <= in_address && addr_range->end >= in_address) + new_addr_range.start = addr_range->start; + + if (addr_range->start <= end_address && addr_range->end >= end_address) + new_addr_range.end = addr_range->end; + } + *out_address = in_address; + *out_size = in_size; + *out_data = in_data; + if (new_addr_range.start != in_address || new_addr_range.end != end_address) { + *out_address = new_addr_range.start; + *out_size = ADDRESS_RANGE_SIZE(new_addr_range.start, new_addr_range.end); + *out_data = kzalloc(*out_size * sizeof(**out_data), GFP_KERNEL); + } +} + +/* + * Reduce the AUX reply down to the values the caller requested + */ +static void dpcd_reduce_address_range( + const uint32_t extended_address, + uint8_t * const extended_data, + const uint32_t extended_size, + const uint32_t reduced_address, + uint8_t * const reduced_data, + const uint32_t reduced_size) +{ + const uint32_t offset = reduced_address - extended_address; + + /* + * If the address is same, address was not extended. + * So we do not need to free any memory. + * The data is in original buffer(reduced_data). + */ + if (extended_data == reduced_data) + return; + + memcpy(&extended_data[offset], reduced_data, reduced_size); + kfree(extended_data); +} + +enum dc_status core_link_read_dpcd( + struct dc_link *link, + uint32_t address, + uint8_t *data, + uint32_t size) +{ + uint32_t extended_address; + uint32_t partitioned_address; + uint8_t *extended_data; + uint32_t extended_size; + /* size of the remaining partitioned address space */ + uint32_t size_left_to_read; + enum dc_status status; + /* size of the next partition to be read from */ + uint32_t partition_size; + uint32_t data_index = 0; + + dpcd_extend_address_range(address, data, size, &extended_address, &extended_data, &extended_size); + partitioned_address = extended_address; + size_left_to_read = extended_size; + while (size_left_to_read) { + partition_size = dpcd_get_next_partition_size(partitioned_address, size_left_to_read); + status = internal_link_read_dpcd(link, partitioned_address, &extended_data[data_index], partition_size); + if (status != DC_OK) + break; + partitioned_address += partition_size; + data_index += partition_size; + size_left_to_read -= partition_size; + } + dpcd_reduce_address_range(extended_address, extended_data, extended_size, address, data, size); + return status; +} + +enum dc_status core_link_write_dpcd( + struct dc_link *link, + uint32_t address, + const uint8_t *data, + uint32_t size) +{ + uint32_t partition_size; + uint32_t data_index = 0; + enum dc_status status; + + while (size) { + partition_size = dpcd_get_next_partition_size(address, size); + status = internal_link_write_dpcd(link, address, &data[data_index], partition_size); + if (status != DC_OK) + break; + address += partition_size; + data_index += partition_size; + size -= partition_size; + } + return status; +} diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpcd.h b/drivers/gpu/drm/amd/display/dc/link/link_dpcd.h new file mode 100644 index 0000000000000..27b08cdbb4a1b --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/link/link_dpcd.h @@ -0,0 +1,41 @@ +/* + * 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 __LINK_DPCD_H__ +#define __LINK_DPCD_H__ +#include "link.h" + +enum dc_status core_link_read_dpcd( + struct dc_link *link, + uint32_t address, + uint8_t *data, + uint32_t size); + +enum dc_status core_link_write_dpcd( + struct dc_link *link, + uint32_t address, + const uint8_t *data, + uint32_t size); +#endif