RE: [PATCH 00/24] DC Patches Aug 17 2026

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 - 856090adf2d66a238b662894698c4aee67dd88fd -> drm/amd/display: Promote DC to 3.2.393) 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
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1 Commerce Valley Dr E, Thornhill, ON L3T 7X6
amd.com


-----Original Message-----
From: James Lin <[email protected]>
Sent: Monday, August 10, 2026 5:29 PM
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]>
Subject: [PATCH 00/24] DC Patches Aug 17 2026

This DC patchset brings improvements in multiple areas. In summary, we have:

- Reworked per-DPM derate handling: refactor the per-DPM derate logic,
  update derates with default per-DPM values, and move the
  soc_and_ip_translator onto the new per-DPM organization
- DCN6 mode-support and UTM work: opt-out for the OutstandingRequests
  check, a utm_support capability flag, and a guard against an empty
  DCN6 UTM QoS table
- More DMU/DMUB offload: send DPM0 clock values for Z8 retention, allow
  DCHVM<->rIOMMU SDP port disconnection on DCN42, and add the DC_BLS
  command
- HWSS block-sequence cleanups: move periodic interrupt calculations
  to HWSS, drop pipe_ctx from HUBP_WAIT_FOR_DCC_META_PROP, use mpcc_id
  instead of the hubp instance, and add a wait stream regen event
- DML updates: unify CalculateFlipSchedule logic and relax the frame
  size limit for the dcn5/6 core funcs files
- clk_mgr refactor renaming carried DCE clock manager functions for
  dcn10, plus a missing-prototype build fix and a static DCN42 SOC BB
  struct
- Expanded IGT/KUnit validation: CACP ACE curve area debugfs and cursor
  mode tests on disabled CRTCs
- eDP fix to skip teardown while a forced PSR is active

Cc: Daniel Wheeler <[email protected]>

Austin Zheng (5):
  drm/amd/display: Make Struct In DCN42 SOC BB Header Static
  drm/amd/display: Refactor Per-DPM Derate Logic
  drm/amd/display: Update Derates And Set Default Per-DPM Derates
  drm/amd/display: Unify CalculateFlipSchedule Logic
  drm/amd/display: Update soc_and_ip_translator To Use Updated Per-DPM
    Derate Organization

Chenyu Chen (1):
  drm/amd/display: Add CACP ACE curve area debugfs for IGT validation

Dillon Varone (1):
  drm/amd/display: Rename carried dce clock manager functions for dcn10

Ivan Lipski (1):
  drm/amd/display: Relax frame size limit for dcn5/6 DML core funcs
    files

James Lin (1):
  drm/amd/display: Add missing prototype for
    amdgpu_dm_plane_fill_gfx8_tiling_info_from_flags

Jun Lei (1):
  drm/amd/display: Add opt-out for DCN6 OutstandingRequests mode-support
    check

Karthi Kandasamy (1):
  drm/amd/display: Skip eDP teardown while forced PSR is active

Ovidiu Bunea (3):
  drm/amd/display: Add DC_BLS command
  drm/amd/display: Notify DMU to allow DCHVM<->rIOMMU SDP port
    disconnection for DCN42
  drm/amd/display: Send DPM0 clock values to DMU

Peichen Huang (1):
  drm/amd/display: add wait stream regen event

Taimur Hassan (2):
  drm/amd/display: [FW Promotion] Release 0.1.71.0
  drm/amd/display: Promote DC to 3.2.394

Tom Chung (2):
  drm/amd/display: set base.enable in cursor mode tests
  drm/amd/display: test native cursor mode on a disabled CRTC

Tomasz Siemek (3):
  drm/amd/display: Move periodic interrupt calculations to HWSS
  drm/amd/display: Refactor HUBP_WAIT_FOR_DCC_META_PROP to drop pipe_ctx
  drm/amd/display: Use mpcc_id instead of hubp instance

Wenjing Liu (2):
  drm/amd/display: Add utm_support capability flag
  drm/amd/display: Guard against empty DCN6 UTM QoS table

 .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c |  68 +++++++
 .../amd/display/amdgpu_dm/amdgpu_dm_plane.h   |   2 +
 .../amdgpu_dm/tests/amdgpu_dm_cursor_test.c   |  24 +++
 .../display/dc/clk_mgr/dce100/dce_clk_mgr.c   | 115 +++++++++++
 .../display/dc/clk_mgr/dce100/dce_clk_mgr.h   |   8 +-
 .../dc/clk_mgr/dce112/dce112_clk_mgr.c        |  59 ++++++
 .../dc/clk_mgr/dce112/dce112_clk_mgr.h        |   4 +-
 .../display/dc/clk_mgr/dcn10/dcn10_clk_mgr.c  |  14 +-  .../display/dc/clk_mgr/dcn10/dcn10_clk_mgr.h  |  12 +-
 .../display/dc/clk_mgr/dcn10/rv1_clk_mgr.c    |   9 +-
 .../display/dc/clk_mgr/dcn10/rv2_clk_mgr.c    |   6 +-
 .../display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c  |  12 +-
 .../dc/clk_mgr/dcn201/dcn201_clk_mgr.c        |   6 +-
 .../amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c |   5 +-
 .../display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c  |   8 +-
 .../display/dc/clk_mgr/dcn301/vg_clk_mgr.c    |   8 +-
 .../display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c  |  10 +-
 .../dc/clk_mgr/dcn314/dcn314_clk_mgr.c        |  10 +-
 .../dc/clk_mgr/dcn315/dcn315_clk_mgr.c        |  10 +-
 .../dc/clk_mgr/dcn316/dcn316_clk_mgr.c        |  10 +-
 .../display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c  |  18 +-  .../display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c  |  12 +-
 .../dc/clk_mgr/dcn401/dcn401_clk_mgr.c        |  18 +-
 .../display/dc/clk_mgr/dcn42/dcn42_clk_mgr.c  |  26 ++-
 .../display/dc/clk_mgr/dcn42/dcn42_clk_mgr.h  |   5 +
 .../dc/clk_mgr/dcn42b/dcn42b_clk_mgr.c        |  11 +-
 .../display/dc/clk_mgr/dcn60/dcn60_clk_mgr.c  |   9 +-
 drivers/gpu/drm/amd/display/dc/core/dc.c      |   8 +-
 .../drm/amd/display/dc/core/dc_hw_sequencer.c | 136 +++++++++----
 drivers/gpu/drm/amd/display/dc/dc.h           |   3 +-
 drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c  |  18 ++  drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h  |  12 ++
 .../gpu/drm/amd/display/dc/dml2_0/Makefile    |   8 +
 .../dml21/inc/bounding_boxes/dcn42_soc_bb.h   |  39 ++--
 .../dml21/inc/bounding_boxes/dcn42b_soc_bb.h  |  25 ++-
 .../dml21/inc/bounding_boxes/dcn4_soc_bb.h    |  27 ++-
 .../dml21/inc/dml_top_display_cfg_types.h     |   1 +
 .../dml21/inc/dml_top_soc_parameter_types.h   |  44 ++++-
 .../src/dml2_core/dml2_core_dcn4_calcs.c      | 183 +++++++-----------
 .../dml2_core_dcn6_funcs_mode_support.c       |   7 +
 .../src/dml2_core/dml2_core_shared_types.h    |   3 +
 .../dml21/src/dml2_dpmm/dml2_dpmm_dcn4.c      | 106 +++++++++-
 .../src/inc/dml2_internal_shared_types.h      |   1 +
 .../display/dc/hubbub/dcn35/dcn35_hubbub.c    |   7 +
 .../amd/display/dc/hwss/dce110/dce110_hwseq.c |   7 +-
 .../amd/display/dc/hwss/dcn10/dcn10_hwseq.c   |  60 ++----
 .../amd/display/dc/hwss/dcn10/dcn10_hwseq.h   |   5 +-
 .../amd/display/dc/hwss/dcn20/dcn20_hwseq.c   |  17 +-
 .../amd/display/dc/hwss/dcn314/dcn314_hwseq.c |   8 +-
 .../amd/display/dc/hwss/dcn32/dcn32_hwseq.c   |   7 +-
 .../amd/display/dc/hwss/dcn401/dcn401_hwseq.c |  24 +--
 .../amd/display/dc/hwss/dcn401/dcn401_hwseq.h |   3 +-
 .../amd/display/dc/hwss/dcn60/dcn60_hwseq.c   |   8 +-
 .../drm/amd/display/dc/hwss/hw_sequencer.h    |  23 ++-
 .../dc/resource/dcn60/dcn60_resource.c        |   1 +
 .../dcn401/dcn401_soc_and_ip_translator.c     |   6 +-
 .../gpu/drm/amd/display/dmub/inc/dmub_cmd.h   |  39 ++++
 .../drm/amd/display/modules/inc/mod_power.h   |   1 +
 58 files changed, 924 insertions(+), 412 deletions(-)

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2.43.0