kernel/linux.git/drivers/gpu/drm/amd/display/dc/dc.h, branch linux-7.1.y

drm/amd/display: Allow embedded connectors without DDC

2026-04-29T14:41:15+00:00

On some laptops, the embedded panel may not have a DDC (display data channel) available. On these, the EDID may be hardcoded in ACPI or the VBIOS. In this case, use GPIO_DDC_LINE_UNKNOWN and don't fail. Fixes: def3488eb0fd ("drm/amd/display: refactor HPD to increase flexibility") Link: https://gitlab.freedesktop.org/drm/amd/-/work_items/5192 Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher (cherry picked from commit 75b8a6ca0e8bc3ce24572f854e95f8721b321179)

drm/amd/display: Promote DC to 3.2.378

2026-04-17T19:24:08+00:00

DC v3.2.378 summary: New: - Add p-state schedule admissibility flags and frame-time utility Fixes: - Fixed incorrect math_mod() result due to wrong variable in fmod implementation (Cc: stable) - Use overlay cursor when a color pipeline is active to avoid incorrect rendering Cleanups: - Add const qualifiers to watermark params struct - Fix narrowing-conversion compiler warnings Signed-off-by: Taimur Hassan Signed-off-by: Aurabindo Pillai Reviewed-by: Alex Hung Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Fix compiler warnings

2026-04-17T19:23:39+00:00

[Why] Implicit conversions from wider integer types to byte-sized fields were generating compiler warnings. These warnings hide intentional protocol /storage boundaries and reduce signal quality during builds. Making conversion intent explicit improves readability and warning hygiene without changing behavior. [How] Added explicit, type-safe casts at intentional narrow-storage boundaries. Kept data models & runtime logic unchanged, only clarifying conversion intent. Functionality and behavior is unchanged; only type intent is explicit. Aligned warning cleanup with existing coding standards for explicit boundary conversions. Reviewed-by: Aric Cyr Signed-off-by: Gaghik Khachatrian Signed-off-by: Aurabindo Pillai Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Promote DC to 3.2.377

2026-04-17T19:21:50+00:00

This version brings along the following updates: - Enable sink freesync via MCCS with pcon whitelist adjustments - Rework YCbCr422 DSC policy - Update DML2.1 parameters - Fix coding style issues and compiler warnings Reviewed-by: Leo Li Signed-off-by: Taimur Hassan Signed-off-by: Roman Li Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Read sink freesync support via mccs

2026-04-17T19:20:56+00:00

If EDID AMD VSDB declares that sink supports MCCS method for freesync usage, send mccs request to understand sink freesync current supporting state. If sink supports freesync but user toggles OSD to turn off it, disable freesync. If HDMI sink doesn't support MCCS method for freesync usage, disable freesync as well. Reviewed-by: Harry Wentland Signed-off-by: Wayne Lin Signed-off-by: Roman Li Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Rework YCbCr422 DSC policy

2026-04-17T19:12:02+00:00

- Reworked YCbCr4:2:2 Native/Simple policy decision making with DSC enabled based on DSC caps and stream signal type Reviewed-by: Wenjing Liu Signed-off-by: Relja Vojvodic Signed-off-by: Roman Li Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Promote DC to 3.2.376

2026-03-30T19:12:54+00:00

This version brings along following fixes: - correct unknown plane state patch - Revert "Refactor DC update checks" - Revert "Add 3DLUT DMA broadcast support" - Remove invalid DPSTREAMCLK mask usage - enable eDP DSC seamless boot support - Revert "Rework HDMI link training and YCbCr422 with DSC policy" - Disable PSR & Replay CRTC disable by default - Fix Silence Compiler Warnings - Add link output control for DPIA - eliminate clock manager code duplication - Don't set 4to1MPC config dynamically - Merge pipes for validate - Fix bounds checking in dml2_0 clock table array - Avoid turning off the PHY when OTG is running for DVI - Should support p-state under dcn21 - Enable Replay support for dcn42 - Remove check for DC_DMCUB_ENABLE on DCN42 Acked-by: Wayne Lin Signed-off-by: Taimur Hassan Signed-off-by: Chuanyu Tseng Signed-off-by: Alex Deucher

Revert "drm/amd/display: Refactor DC update checks"

2026-03-30T19:01:06+00:00

Revert commit c24bb00cc6cf ("drm/amd/display: Refactor DC update checks") [WHY] Causing issues with PSR/Replay, reverting until those can be fixed. Reviewed-by: Martin Leung Signed-off-by: Dillon Varone Signed-off-by: Chuanyu Tseng Signed-off-by: Alex Deucher

Revert "drm/amd/display: Rework YCbCr422 DSC policy"

2026-03-30T18:56:26+00:00

Revert commit 19b79e4f2182 ("drm/amd/display: Rework YCbCr422 DSC policy") Reason for Revert: This commit is causing compliance failures Reviewed-by: Wenjing Liu Signed-off-by: Relja Vojvodic Signed-off-by: Chuanyu Tseng Signed-off-by: Alex Deucher

drm/amd/display: Fixed silence signed/unsigned mismatch warnings

2026-03-30T18:55:39+00:00

Fix compiler warnings by consistently use the same signedness for a given value Reviewed-by: Joshua Aberback Signed-off-by: Clay King Signed-off-by: Chuanyu Tseng Signed-off-by: Alex Deucher