Public
Hi all,
This week this patchset was tested on 4 systems, two dGPU and two APU based,
and tested across multiple display and connection types.
APU
* Single Display eDP -> 1080p 60hz, 1920x1200 165hz, 3840x2400 60hz
* Single Display DP (SST DSC) -> 4k144hz, 4k240hz
* Multi display -> eDP + DP/HDMI/USB-C -> 1080p 60hz eDP + 4k 144hz, 4k
240hz (Includes USB-C to DP/HDMI adapters)
* Thunderbolt -> LG Ultrafine 5k
* MST DSC -> Cable Matters 101075 (DP to 3x DP) with 3x 4k60hz
displays, HP Hook G2 with 2x 4k60hz displays
* USB 4 -> HP Hook G4, Lenovo Thunderbolt Dock, both with 2x 4k60hz DP
and 1x 4k60hz HDMI displays
* SST PCON -> Club3D CAC-1085 + 1x 4k 144hz, FRL3, at a max resolution
supported by the dongle of 4k 120hz YUV420 12bpc.
* MST PCON -> 1x 4k 144hz, FRL3, at a max resolution supported by the
adapter of 4k 120hz RGB 8bpc.
DGPU
* Single Display DP (SST DSC) -> 4k144hz, 4k240hz
* Multiple Display DP -> 4k240hz + 4k144hz
* MST (Startech MST14DP123DP [DP to 3x DP] and 2x 4k 60hz displays)
* MST DSC (with Cable Matters 101075 [DP to 3x DP] with 3x 4k60hz
displays)
The testing is a mix of automated and manual tests. Manual testing includes
(but is not limited to)
* Changing display configurations and settings
* Video/Audio playback
* Benchmark testing
* Suspend/Resume testing
* Feature testing (Freesync, HDCP, etc.)
Automated testing includes (but is not limited to)
* Script testing (scripts to automate some of the manual checks)
* IGT testing
The testing is mainly tested on the following displays, but occasionally there
are tests with other displays
* Samsung G8 Neo 4k240hz
* Samsung QN55QN95B 4k 120hz
* Acer XV322QKKV 4k144hz
* HP U27 4k Wireless 4k60hz
* LG 27UD58B 4k60hz
* LG 32UN650WA 4k60hz
* LG Ultrafine 5k 5k60hz
* AU Optronics B140HAN01.1 1080p 60hz eDP
* AU Optronics B160UAN01.J 1920x1200 165hz eDP
* Samsung ATNA60YV02-0 3840x2400 60Hz OLED eDP
The patchset consists of the amd-staging-drm-next branch (Head commit ->
29393ab0e49fe052ee7292481733c3d0ce7151e2 -> drm/amd/display: Promote DC to
3.2.397) with new patches added on top of it.
Tested on Ubuntu 26.04, on Gnome Wayland.
Tested-by: Dan Wheeler <[email protected]>
Thank you,
Dan Wheeler
Sr. Technologist | AMD
SW Display
------------------------------------------------------------------------------------------------------------------
1 Commerce Valley Dr E, Thornhill, ON L3T 7X6
amd.com
-----Original Message-----
From: Chenyu Chen <[email protected]>
Sent: Tuesday, September 8, 2026 7:31 AM
To: [email protected]
Cc: Wentland, Harry <[email protected]>; Li, Sun peng (Leo)
<[email protected]>; Pillai, Aurabindo <[email protected]>; Li, Roman
<[email protected]>; Lin, Wayne <[email protected]>; Chung, ChiaHsuan (Tom)
<[email protected]>; Zuo, Jerry <[email protected]>; Wheeler, Daniel
<[email protected]>; Wu, Ray <[email protected]>; LIPSKI, IVAN
<[email protected]>; Hung, Alex <[email protected]>; Lin, Ping Lei
<[email protected]>; Chen, Chen-Yu <[email protected]>; Chen, Chen-Yu
<[email protected]>
Subject: [PATCH 00/66] DC Patches Sep 14 2026
This DC patchset brings improvements in multiple areas. In summary, we
highlight:
- Expand amdgpu_dm KUnit coverage across connector init, sink stream
creation, FreeSync caps, forced atomic commit, plane modifiers, cursor
updates, panic flush, MST connector creation, AUX transfers, link
bandwidth readback and MST DSC configuration.
- Refactor RMCM into a separate module.
- Decouple cursor offload hwss executors from pipe context.
- Decouple HUBP_UPDATE_PLANE_ADDR from pipe_ctx.
- Rename lock_and_validation_needed to needs_dc_state_realloc.
- Drop the dead update_type param from update_planes_and_stream_adapter.
- Attach only plane updates and stream updates that actually changed.
- Unify fast update classification paths.
- Request DMUB HW cursor offload.
- Program DCC as part of address update.
- Update LLS and UPSP programming paths.
- Add lock-free memory pool.
- Add instance field to struct mpc and struct dccg.
- Cleanup DMUB command submission interfaces.
- Add inbox0 HW lock helpers for DCN35.
- Atomize IRQ register read/modify/write ops.
- Add Replay cumulative residency query.
- Add urgent assertion counter probe.
- Add debug option to force optional UCLK support.
- Force DSC to 8bpp for SST and MST DP tunneling over USB4.
- Honor forced RGB pixel encoding.
- Add option for certain panels to disable FEC.
- Cap DML2.1 vmin ODM combine at 2:1 for eDP.
- Add is_odm_enabled callback to skip init_odm on active ODM pipes.
- Remove MALL capabilities from DCN42B.
- Skip MALL calculations when there is no MALL.
- Enable power gating on dcn42b.
- Remove SDPIF_PORT_CONTROL programming for DCN31/35/42.
- Enable back alt-ch.
- Flush ISM work before releasing the stream.
- Fix HDMI FRL audio enable.
- Fix peak bandwidth measurement sequence.
- Bound the DSC power gating loop by num_dsc.
- Cast DP DTO pixel clock math to avoid overflow and narrowing.
- Use unsigned types for FRL cap check params and HPO read_state.
- Return success status from check_mode_supported.
- Add SPDX license identifier to dcn30_dpp_cm.c.
Cc: Daniel Wheeler <[email protected]>
Alex Hung (25):
drm/amd/display: Test sink stream creation
drm/amd/display: Test connector init helper
drm/amd/display: Test HDMI connector init
drm/amd/display: Test FreeSync caps update
drm/amd/display: Test connector init
drm/amd/display: Test forced atomic commit
drm/amd/display: Test DCC reject for multi-plane format
drm/amd/display: Test modifier list growth failure
drm/amd/display: Test pre-GFX9 plane buffer attributes
drm/amd/display: Test accepted plane atomic check
drm/amd/display: Test cursor update without DC stream
drm/amd/display: Test panic flush DCC teardown
drm/amd/display: Test optional plane property creation
drm/amd/display: Build MST DSC helpers for KUnit
drm/amd/display: Test oversized AUX transfer
drm/amd/display: Test MST connector creation
drm/amd/display: Test link bandwidth readback
drm/amd/display: Test cascaded Panamera check
drm/amd/display: Test DSC caps validation
drm/amd/display: Test MST port mode support
drm/amd/display: Test FRL bandwidth lookup
drm/amd/display: Test DSC precompute helpers
drm/amd/display: Test DSC recompute check
drm/amd/display: Test DSC config computation
drm/amd/display: Test per-link DSC configs
Alvin Lee (5):
drm/amd/display: Update LLS and UPSP programming paths
drm/amd/display: Add debug option to force optional UCLK support
drm/amd/display: Enable back alt-ch
drm/amd/display: Program DCC as part of address update
drm/amd/display: Return success status from check_mode_supported
Chenyu Chen (1):
drm/amd/display: Use unsigned types for FRL cap check params and HPO
read_state
Dillon Varone (1):
drm/amd/display: Cleanup DMUB command submission interfaces
Dominik Kaszewski (1):
drm/amd/display: Add lock-free memory pool
Fangzhi Zuo (2):
drm/amd/display: Force DSC to 8bpp for MST DP tunneling over USB4
drm/amd/display: Force DSC to 8bpp for SST DP tunneling over USB4
Gabe Teeger (4):
drm/amd/display: Enable power gating on dcn42b
drm/amd/display: Bound DSC power gating loop by num_dsc
drm/amd/display: Remove MALL capabilities from DCN42B
drm/amd/display: Remove MALL capabilities from DCN42B bounding box
Ilya Bakoulin (1):
drm/amd/display: Fix HDMI FRL audio enable
Ivan Lipski (1):
drm/amd/display: Honor forced RGB pixel encoding
James Lin (6):
drm/amd/display: Rename lock_and_validation_needed to
needs_dc_state_realloc
drm/amd/display: Attach only plane updates that actually changed
drm/amd/display: Request DMUB HW cursor offload
drm/amd/display: Send stream_update to DC only when it changed
drm/amd/display: Drop dead update_type param from
update_planes_and_stream_adapter
drm/amd/display: Cast DP DTO pixel clock math to avoid overflow and
narrowing
Leo Chen (1):
drm/amd/display: Cap DML2.1 vmin ODM combine at 2:1 for eDP
Leo Li (1):
drm/amd/display: Atomize IRQ register read/modify/write ops
Ovidiu Bunea (2):
drm/amd/display: Remove SDPIF_PORT_CONTROL programming for DCN31/35/42
drm/amd/display: Add condition to skip MALL calculations if there is
no MALL
Rafal Ostrowski (2):
drm/amd/display: Refactor RMCM into a separate module
drm/amd/display: Unify fast update classification paths
Ray Wu (1):
drm/amd/display: Flush ISM work before releasing the stream
Taimur Hassan (1):
drm/amd/display: Promote DC to 3.2.398
Tom Chung (1):
drm/amd/display: Add inbox0 HW lock helpers for DCN35
Tomasz Siemek (2):
drm/amd/display: Decouple cursor offload hwss executors from pipe
context
drm/amd/display: Decouple HUBP_UPDATE_PLANE_ADDR from pipe_ctx
Tony Cheng (3):
drm/amd/display: Add instance field to struct mpc
drm/amd/display: Add instance field to struct dccg
drm/amd/display: Add SPDX license identifier to dcn30_dpp_cm.c
Wang, Sung-huai (1):
drm/amd/display: Add is_odm_enabled callback to skip init_odm on
active ODM pipes
Wei-Guang Li (1):
drm/amd/display: Add Replay cumulative residency query
Wenjing Liu (2):
drm/amd/display: Add urgent assertion counter probe
drm/amd/display: Fix peak bandwidth measurement sequence
Yi-Ling Chen (1):
drm/amd/display: Add option for certain panels to disable FEC
drivers/gpu/drm/amd/display/Makefile | 1 +
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 113 +-
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 27 +-
.../display/amdgpu_dm/amdgpu_dm_connector.c | 19 +-
.../display/amdgpu_dm/amdgpu_dm_connector.h | 1 +
.../amd/display/amdgpu_dm/amdgpu_dm_crtc.c | 9 +-
.../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 3 +-
.../drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c | 64 +-
.../drm/amd/display/amdgpu_dm/amdgpu_dm_irq.h | 28 +
.../drm/amd/display/amdgpu_dm/amdgpu_dm_ism.c | 21 +-
.../drm/amd/display/amdgpu_dm/amdgpu_dm_ism.h | 2 +-
.../display/amdgpu_dm/amdgpu_dm_mst_types.c | 61 +-
.../display/amdgpu_dm/amdgpu_dm_mst_types.h | 19 +
.../amd/display/amdgpu_dm/amdgpu_dm_plane.c | 33 +
.../tests/amdgpu_dm_connector_test.c | 1345 +++++++++++
.../amdgpu_dm/tests/amdgpu_dm_crtc_test.c | 16 +-
.../amdgpu_dm/tests/amdgpu_dm_helpers_test.c | 8 +-
.../amdgpu_dm/tests/amdgpu_dm_irq_test.c | 34 +-
.../amdgpu_dm/tests/amdgpu_dm_ism_test.c | 83 +-
.../tests/amdgpu_dm_mst_types_test.c | 2041 ++++++++++++++++-
.../amdgpu_dm/tests/amdgpu_dm_plane_test.c | 357 ++-
.../display/amdgpu_dm/tests/amdgpu_dm_test.c | 4 +-
drivers/gpu/drm/amd/display/dc/Makefile | 3 +-
drivers/gpu/drm/amd/display/dc/core/dc.c | 254 +-
.../drm/amd/display/dc/core/dc_hw_sequencer.c | 246 +-
.../gpu/drm/amd/display/dc/core/dc_resource.c | 147 +-
.../gpu/drm/amd/display/dc/core/dc_state.c | 2 -
.../gpu/drm/amd/display/dc/core/dc_stream.c | 124 +-
drivers/gpu/drm/amd/display/dc/dc.h | 48 +-
drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c | 50 +-
drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h | 12 +-
.../gpu/drm/amd/display/dc/dc_memory_pool.c | 277 +++
.../gpu/drm/amd/display/dc/dc_memory_pool.h | 107 +
drivers/gpu/drm/amd/display/dc/dc_stream.h | 14 +-
.../amd/display/dc/dccg/dcn20/dcn20_dccg.c | 1 +
.../amd/display/dc/dccg/dcn201/dcn201_dccg.c | 1 +
.../amd/display/dc/dccg/dcn21/dcn21_dccg.c | 1 +
.../amd/display/dc/dccg/dcn30/dcn30_dccg.c | 2 +
.../amd/display/dc/dccg/dcn301/dcn301_dccg.c | 1 +
.../amd/display/dc/dccg/dcn31/dcn31_dccg.c | 1 +
.../amd/display/dc/dccg/dcn314/dcn314_dccg.c | 1 +
.../amd/display/dc/dccg/dcn32/dcn32_dccg.c | 1 +
.../amd/display/dc/dccg/dcn35/dcn35_dccg.c | 1 +
.../amd/display/dc/dccg/dcn401/dcn401_dccg.c | 1 +
.../amd/display/dc/dccg/dcn42/dcn42_dccg.c | 1 +
.../amd/display/dc/dccg/dcn60/dcn60_dccg.c | 1 +
.../drm/amd/display/dc/dce/dce_clock_source.c | 6 +-
.../gpu/drm/amd/display/dc/dce/dmub_replay.c | 25 +
.../gpu/drm/amd/display/dc/dce/dmub_replay.h | 2 +
.../dml21/inc/bounding_boxes/dcn42b_soc_bb.h | 2 +-
.../src/dml2_core/dml2_core_dcn4_calcs.c | 4 +
.../dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c | 11 +-
.../dml2_0/dml21/src/dml2_top/dml2_top_utm.c | 2 +-
.../dml21_wrapper/dml21_translation_helper.c | 1 +
.../amd/display/dc/dpp/dcn30/dcn30_dpp_cm.c | 2 +
.../drm/amd/display/dc/dpp/dcn50/dcn50_dpp.c | 20 +-
.../drm/amd/display/dc/dpp/dcn50/dcn50_dpp.h | 3 +-
.../hpo/dcn30/dcn30_hpo_frl_stream_encoder.c | 6 +-
.../hpo/dcn42/dcn42_hpo_frl_stream_encoder.c | 9 +-
.../hpo/dcn60/dcn60_hpo_frl_stream_encoder.c | 9 +-
.../display/dc/hubbub/dcn31/dcn31_hubbub.c | 5 -
.../display/dc/hubbub/dcn35/dcn35_hubbub.c | 7 +-
.../display/dc/hubbub/dcn42/dcn42_hubbub.c | 13 +-
.../display/dc/hubbub/dcn60/dcn60_hubbub.c | 44 +-
.../amd/display/dc/hubp/dcn10/dcn10_hubp.c | 4 +-
.../amd/display/dc/hubp/dcn10/dcn10_hubp.h | 3 +-
.../amd/display/dc/hubp/dcn20/dcn20_hubp.c | 5 +-
.../amd/display/dc/hubp/dcn20/dcn20_hubp.h | 3 +-
.../amd/display/dc/hubp/dcn21/dcn21_hubp.c | 5 +-
.../amd/display/dc/hubp/dcn30/dcn30_hubp.c | 5 +-
.../amd/display/dc/hubp/dcn30/dcn30_hubp.h | 3 +-
.../amd/display/dc/hubp/dcn401/dcn401_hubp.c | 9 +-
.../amd/display/dc/hubp/dcn401/dcn401_hubp.h | 3 +-
.../amd/display/dc/hubp/dcn42/dcn42_hubp.c | 6 +-
.../amd/display/dc/hubp/dcn50/dcn50_hubp.c | 28 +-
.../amd/display/dc/hubp/dcn50/dcn50_hubp.h | 3 +-
.../amd/display/dc/hwss/dcn10/dcn10_hwseq.c | 108 +-
.../amd/display/dc/hwss/dcn10/dcn10_hwseq.h | 2 +
.../amd/display/dc/hwss/dcn10/dcn10_init.c | 1 +
.../amd/display/dc/hwss/dcn20/dcn20_hwseq.c | 40 +-
.../amd/display/dc/hwss/dcn20/dcn20_hwseq.h | 2 +
.../amd/display/dc/hwss/dcn20/dcn20_init.c | 1 +
.../amd/display/dc/hwss/dcn201/dcn201_hwseq.c | 27 +-
.../amd/display/dc/hwss/dcn201/dcn201_hwseq.h | 2 +
.../amd/display/dc/hwss/dcn201/dcn201_init.c | 1 +
.../amd/display/dc/hwss/dcn21/dcn21_init.c | 1 +
.../amd/display/dc/hwss/dcn30/dcn30_init.c | 1 +
.../amd/display/dc/hwss/dcn301/dcn301_init.c | 1 +
.../amd/display/dc/hwss/dcn31/dcn31_init.c | 1 +
.../amd/display/dc/hwss/dcn314/dcn314_init.c | 1 +
.../amd/display/dc/hwss/dcn32/dcn32_hwseq.c | 43 +-
.../amd/display/dc/hwss/dcn32/dcn32_init.c | 1 +
.../amd/display/dc/hwss/dcn35/dcn35_hwseq.c | 117 +-
.../amd/display/dc/hwss/dcn35/dcn35_hwseq.h | 14 +-
.../amd/display/dc/hwss/dcn35/dcn35_init.c | 1 +
.../amd/display/dc/hwss/dcn351/dcn351_init.c | 1 +
.../amd/display/dc/hwss/dcn401/dcn401_hwseq.c | 39 +-
.../amd/display/dc/hwss/dcn401/dcn401_hwseq.h | 5 +-
.../amd/display/dc/hwss/dcn401/dcn401_init.c | 1 +
.../amd/display/dc/hwss/dcn42/dcn42_hwseq.c | 283 ++-
.../amd/display/dc/hwss/dcn42/dcn42_hwseq.h | 17 +-
.../amd/display/dc/hwss/dcn42/dcn42_init.c | 6 +-
.../amd/display/dc/hwss/dcn50/dcn50_hwseq.c | 10 +-
.../amd/display/dc/hwss/dcn60/dcn60_hwseq.c | 194 +-
.../amd/display/dc/hwss/dcn60/dcn60_hwseq.h | 5 +-
.../amd/display/dc/hwss/dcn60/dcn60_init.c | 8 +-
.../drm/amd/display/dc/hwss/hw_sequencer.h | 70 +-
.../display/dc/hwss/hw_sequencer_private.h | 4 +
.../gpu/drm/amd/display/dc/inc/core_types.h | 4 +-
drivers/gpu/drm/amd/display/dc/inc/hw/dccg.h | 1 +
drivers/gpu/drm/amd/display/dc/inc/hw/dpp.h | 3 +-
drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h | 4 +-
drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h | 65 +-
drivers/gpu/drm/amd/display/dc/inc/hw/rmcm.h | 140 ++
.../amd/display/dc/inc/hw/timing_generator.h | 1 +
.../gpu/drm/amd/display/dc/inc/link_service.h | 2 +
drivers/gpu/drm/amd/display/dc/inc/resource.h | 18 +-
.../drm/amd/display/dc/link/link_factory.c | 1 +
.../link/protocols/link_edp_panel_control.c | 22 +
.../link/protocols/link_edp_panel_control.h | 2 +
.../drm/amd/display/dc/mpc/dcn10/dcn10_mpc.c | 1 +
.../drm/amd/display/dc/mpc/dcn20/dcn20_mpc.c | 1 +
.../drm/amd/display/dc/mpc/dcn30/dcn30_mpc.c | 1 +
.../drm/amd/display/dc/mpc/dcn32/dcn32_mpc.c | 1 +
.../amd/display/dc/mpc/dcn401/dcn401_mpc.c | 1 +
.../drm/amd/display/dc/mpc/dcn42/dcn42_mpc.c | 680 +-----
.../drm/amd/display/dc/mpc/dcn42/dcn42_mpc.h | 714 +-----
.../drm/amd/display/dc/mpc/dcn60/dcn60_mpc.c | 41 +-
.../drm/amd/display/dc/mpc/dcn60/dcn60_mpc.h | 238 --
.../amd/display/dc/optc/dcn31/dcn31_optc.c | 10 +
.../amd/display/dc/optc/dcn31/dcn31_optc.h | 1 +
.../amd/display/dc/optc/dcn314/dcn314_optc.c | 1 +
.../amd/display/dc/optc/dcn35/dcn35_optc.c | 1 +
.../amd/display/dc/optc/dcn42/dcn42_optc.c | 1 +
drivers/gpu/drm/amd/display/dc/os_types.h | 1 +
.../amd/display/dc/pg/dcn42/dcn42_pg_cntl.c | 4 +
.../dc/resource/dcn42/dcn42_resource.c | 56 +-
.../dc/resource/dcn42b/dcn42b_resource.c | 123 +-
.../dc/resource/dcn60/dcn60_resource.c | 20 +-
drivers/gpu/drm/amd/display/dc/rmcm/Makefile | 44 +
.../amd/display/dc/rmcm/dcn42/dcn42_rmcm.c | 867 +++++++
.../amd/display/dc/rmcm/dcn42/dcn42_rmcm.h | 717 ++++++
.../amd/display/dc/rmcm/dcn60/dcn60_rmcm.c | 251 ++
.../amd/display/dc/rmcm/dcn60/dcn60_rmcm.h | 35 +
drivers/gpu/drm/amd/display/dmub/dmub_srv.h | 2 +-
.../gpu/drm/amd/display/dmub/src/dmub_srv.c | 7 +-
.../drm/amd/display/modules/inc/mod_power.h | 3 +
.../amd/display/modules/power/power_replay.c | 13 +
148 files changed, 8132 insertions(+), 2808 deletions(-) create mode 100644
drivers/gpu/drm/amd/display/dc/dc_memory_pool.c
create mode 100644 drivers/gpu/drm/amd/display/dc/dc_memory_pool.h
create mode 100644 drivers/gpu/drm/amd/display/dc/inc/hw/rmcm.h
create mode 100644 drivers/gpu/drm/amd/display/dc/rmcm/Makefile
create mode 100644 drivers/gpu/drm/amd/display/dc/rmcm/dcn42/dcn42_rmcm.c
create mode 100644 drivers/gpu/drm/amd/display/dc/rmcm/dcn42/dcn42_rmcm.h
create mode 100644 drivers/gpu/drm/amd/display/dc/rmcm/dcn60/dcn60_rmcm.c
create mode 100644 drivers/gpu/drm/amd/display/dc/rmcm/dcn60/dcn60_rmcm.h
--
2.43.0
