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path: root/drivers/gpu/drm/amd/display/dc/link/hwss
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2024-09-18drm/amd/display: Restructure dpia link trainingPeichen Huang1-4/+27
[WHY] We intend to consolidate dp tunneling and conventional dp link training. [HOW] 1. Use the same link training entry for both dp and dpia 2. Move SET_CONFIG of non-transparent mode to dmub side 3. Add set_tps_notification dmub_cmd to notify tps request for non-transparent dpia link training 4. Check dpcd request result and abort link training early if dpia aux tunneling fails 5. Add option to avoid affect old product 6. Separately handle wait_time_microsec for dpia Reviewed-by: Cruise Hung <[email protected]> Reviewed-by: George Shen <[email protected]> Reviewed-by: Meenakshikumar Somasundaram <[email protected]> Signed-off-by: Peichen Huang <[email protected]> Signed-off-by: Alex Hung <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2024-07-23drm/amd/display: Check link_res->hpo_dp_link_enc before using itAlex Hung1-0/+5
[WHAT & HOW] Functions dp_enable_link_phy and dp_disable_link_phy can pass link_res without initializing hpo_dp_link_enc and it is necessary to check for null before dereferencing. This fixes 1 FORWARD_NULL issue reported by Coverity. Fixes: 0beca868cde8 ("drm/amd/display: Check link_res->hpo_dp_link_enc before using it") Reviewed-by: Rodrigo Siqueira <[email protected]> Signed-off-by: Alex Hung <[email protected]> Signed-off-by: Aurabindo Pillai <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2024-07-23drm/amd/display: Check null pointers before multiple usesAlex Hung1-1/+4
[WHAT & HOW] Poniters, such as stream_enc and dc->bw_vbios, are null checked previously in the same function, so Coverity warns "implies that stream_enc and dc->bw_vbios might be null". They are used multiple times in the subsequent code and need to be checked. This fixes 10 FORWARD_NULL issues reported by Coverity. Reviewed-by: Rodrigo Siqueira <[email protected]> Signed-off-by: Jerry Zuo <[email protected]> Signed-off-by: Alex Hung <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2024-07-23drm/amd/display: Check link_res->hpo_dp_link_enc before using itAlex Hung1-0/+7
[WHAT & HOW] Functions dp_enable_link_phy and dp_disable_link_phy can pass link_res without initializing hpo_dp_link_enc and it is necessary to check for null before dereferencing. This fixes 2 FORWARD_NULL issues reported by Coverity. Reviewed-by: Rodrigo Siqueira <[email protected]> Signed-off-by: Jerry Zuo <[email protected]> Signed-off-by: Alex Hung <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2024-07-16drm/amd/display: Move DIO documentation to the right placeRodrigo Siqueira2-9/+29
When building the kernel-doc, it complains with the below warning: ./drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h:1: warning: no structured comments found ./drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h:1: warning: no structured comments found This warning was caused by the wrong use of the ':export:' and the lack of function documentation in the file pointed under the ':internal:'. This commit addresses those issues by relocating the overview documentation to the correct C file, removing the ':export:' options, and adding two simple kernel-doc to ensure that ':internal:' does not have any warning. Cc: Alex Deucher <[email protected]> Acked-by: Alex Deucher <[email protected]> Reported-by: Stephen Rothwell <[email protected]> Link: https://lore.kernel.org/dri-devel/[email protected]/ Signed-off-by: Rodrigo Siqueira <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2024-06-14drm/amd/display: Update FIXED_VS retimer training pattern delayMichael Strauss1-3/+3
[WHY] Needed for PHY patterns as well to perform electrical compliance. Also need to increase wait time from 30ms to 50ms to resolve very intermittent UHBR20 link training failures. Reviewed-by: Wenjing Liu <[email protected]> Acked-by: Zaeem Mohamed <[email protected]> Signed-off-by: Michael Strauss <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2024-06-05drm/amd/display: turn on symclk for dio virtual stream in dpms sequenceWenjing Liu1-1/+6
[why] In order to support glitchless display clock ramping for virtual stream, we must turn on symclk for stream encoder. The code will power on phy and enable symclk for dio encoder during virtual stream dpms sequence. Reviewed-by: Dillon Varone <[email protected]> Acked-by: Zaeem Mohamed <[email protected]> Signed-off-by: Wenjing Liu <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2024-05-08drm/amd/display: Reset input mode for DIG on encoder resetDillon Varone1-0/+2
[WHY & HOW] Make enable and disable sequences symmetric. Reviewed-by: Wenjing Liu <[email protected]> Acked-by: Tom Chung <[email protected]> Signed-off-by: Dillon Varone <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2024-05-08drm/amd/display: Refactor input mode programming for DIG FIFODillon Varone1-0/+3
[WHY] Input mode for the DIG FIFO should be programmed as part of stream encoder setup. [HOW] Pre-calculate the pixels per cycle as part of the pixel clock params, and program as part of stream encoder setup. Reviewed-by: Wenjing Liu <[email protected]> Acked-by: Tom Chung <[email protected]> Signed-off-by: Dillon Varone <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2024-04-30drm/amd/display: Add delay to improve LTTPR UHBR interopMichael Strauss1-0/+5
[WHY] Avoid race condition which puts LTTPR into bad state during UHBR LT. [HOW] Delay 30ms between starting UHBR TPS1 PHY output and sending TPS1 via DPCD. Reviewed-by: Wenjing Liu <[email protected]> Acked-by: Aurabindo Pillai <[email protected]> Signed-off-by: Michael Strauss <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2024-02-14drm/amd/display: Update FIXED_VS Retimer HWSS Test Pattern SequencesMichael Strauss2-36/+31
[WHY] Need to fix some broken logic and sequencing in initial commit [HOW] Fix logic handling override deprogramming when exiting SQ128. Don't exit early from dp_set_hw_lane_settings for DP2/FIXED_VS case. Move LTTPR 128b/132b check out of requires_hwss and check during runtime, as LTTPR caps are not populated on initial call. Add pending_test_pattern to link state to allow HWSS to set FFE overrides on retimer TX and/or skip setting APU TX FFE depending on requested pattern. Use updated clock source for SQ128 override sequence. Skip HW FFE preset programming when performing test pattern overrides. Reviewed-by: Wenjing Liu <[email protected]> Acked-by: Aurabindo Pillai <[email protected]> Signed-off-by: Michael Strauss <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2024-01-29Documentation/gpu: Add entry for the DIO componentRodrigo Siqueira1-0/+10
Cc: Mario Limonciello <[email protected]> Cc: Alex Deucher <[email protected]> Cc: Harry Wentland <[email protected]> Cc: Hamza Mahfooz <[email protected]> Cc: Christian König <[email protected]> Cc: Aurabindo Pillai <[email protected]> Reviewed-by: Mario Limonciello <[email protected]> Acked-by: Christian König <[email protected]> Acked-by: Hamza Mahfooz <[email protected]> Signed-off-by: Rodrigo Siqueira <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2023-09-26drm/amd/display: switch DC over to the new DRM logging macrosHamza Mahfooz1-0/+2
For multi-GPU systems it is difficult to tell which GPU a particular message is being printed for and that is undesirable because it complicates debugging efforts. Also, the new macros allow us to enable logging for particular parts of the codebase more selectively (since we no longer need to throw everything at DRM_DEBUG_KMS()). So, for the reasons outlined above we should switch to the new macros. We can accomplish this by using the existing DC_LOGGER code to pass around the relevant `struct drm_device` which will be fed to the new macros in logger_types.h. Also, we must get rid of all instances of the DC_LOG_.*() functions that are currently in amdgpu_dm since we don't use the DC logger there and we can simply refer to the macros directly there instead. Reviewed-by: Rodrigo Siqueira <[email protected]> Signed-off-by: Hamza Mahfooz <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2023-08-15drm/amd/display: Support Compliance Test Pattern Generation with DP2 RetimerMichael Strauss8-13/+541
[WHY] Certain retimer requires workarounds in order to correctly output test patterns. [HOW] Add vendor-specific aux sequences to program retimer's TX and pattern generator when specific compliance test patterns are requested by sink. Note: SQ128 w/a in DPMF mode only works in one flip orientation currently Reviewed-by: Hansen Dsouza <[email protected]> Reviewed-by: Wenjing Liu <[email protected]> Acked-by: Stylon Wang <[email protected]> Signed-off-by: Michael Strauss <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2023-08-07drm/amd/display: Add symclk enable/disable during stream enable/disableTaimur Hassan1-0/+3
[Why & How] Using dig_stream_mapper, program symclk_en and symclk_fe_src_sel when enabling or disabling the corresponding stream. Reviewed-by: Charlene Liu <[email protected]> Acked-by: Aurabindo Pillai <[email protected]> Signed-off-by: Taimur Hassan <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2023-07-18drm/amd/display: Fix DP2 link training failure with RCODaniel Miess1-0/+10
[Why] When RCO is enabled for symclk32_le we get failures during DP2 link traing compliance tests. [How] Break out symclk32_le RCO into a separate function that is called for hpo when link is enabled/disabled. Reviewed-by: Nicholas Kazlauskas <[email protected]> Acked-by: Alan Liu <[email protected]> Signed-off-by: Daniel Miess <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2023-06-09drm/amd/display: Clean FPGA code in dcQingqing Zhuo1-78/+5
[Why] Drop dead code for Linux. [How] Remove all IS_FPGA_MAXIMUS_DC and IS_DIAG_DC Reviewed-by: Ariel Bernstein <[email protected]> Acked-by: Tom Chung <[email protected]> Signed-off-by: Qingqing Zhuo <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2023-03-14drm/amd/display: convert link.h functions to function pointer styleWenjing Liu2-11/+19
[Why & How] All dc subcomponents should call another dc component via function pointers stored in a component structure. This is part of dc coding convention since the beginning. The reason behind this is to improve encapsulation and polymorphism. The function contract is extracted into a single link service structure defined in link.h header file and implemented only in link_factory.c instead of spreading across multiple files in link component file structure. Reviewed-by: Jun Lei <[email protected]> Acked-by: Qingqing Zhuo <[email protected]> Signed-off-by: Wenjing Liu <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2023-02-08drm/amd/display: break down dc_link.cWenjing Liu2-10/+10
[why] dc_link contains over 30k line of code, the decision is to break it down to files residing in link folder based on functionality. This change is the last break down change which will remove dc_link.c file after everything is broken down. [how] Move remaining dc_link.c functions into link_detection, link_dpms, link_validation, link_resource, and link_fpga and remove dc_link. Reviewed-by: George Shen <[email protected]> Acked-by: Qingqing Zhuo <[email protected]> Signed-off-by: Wenjing Liu <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2023-01-24drm/amd/display: merge dc_link_dp into dc_linkWenjing Liu4-2/+2
[why] Temporarly merge dc_link_dp functions into dc_link for the purpose of removing dc_link_dp files. This is a transitional change for later commits where we will further refactor dc_link file. Reviewed-by: George Shen <[email protected]> Acked-by: Alan Liu <[email protected]> Signed-off-by: Wenjing Liu <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
2023-01-24drm/amd/display: create accessories, hwss and protocols sub folders in linkWenjing Liu6-0/+735
[why] link component contains three sub folders: accessories - utilities for improving testability, logging or tracing, doesn't impact end user use cases. protocols - specs defined protocols used in end user use cases hwss - hwss owned link_hwss object, served as an abstraction layer in hwss to access various types of encoder/phy/dpia endpoints in a unified interface. sooner we will have files directly under link folder one for the implementation of each major link behavior such as link_create, link_detect, link_validate and link_set_dpms. Reviewed-by: George Shen <[email protected]> Reviewed-by: Jun Lei <[email protected]> Acked-by: Alan Liu <[email protected]> Signed-off-by: Wenjing Liu <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
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