linux/drivers/gpu/drm/amd/display/dc/link, branch master

drm/amd/display: Fixed Silence complier warnings in dc

2026-03-30T19:12:15Z

[Why] Resolve compiler warnings by marking unused parameters explicitly. [How] In .c and .h function definitions, keep parameter names in signatures and add a line with `(void)param;` in function body Preserved function signatures and avoids breaking code paths that may reference the parameter under conditional compilation. Reviewed-by: Dillon Varone Reviewed-by: Austin Zheng Signed-off-by: Gaghik Khachatrian Signed-off-by: Chuanyu Tseng Signed-off-by: Alex Deucher

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

2026-03-30T18:56:26Z

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/dc: Add link output control for DPIA

2026-03-30T18:55:35Z

[Why] To support specific sequencing requirements for DPIA link output [How] Implement the dpia_link_hwss structure and define the necessary control function pointers. The initialization order is aligned with the core link_hwss definition to ensure consistency Reviewed-by: Wenjing Liu Signed-off-by: Lincheng Ku Signed-off-by: Chuanyu Tseng Signed-off-by: Alex Deucher

drm/amd/display: Rework YCbCr422 DSC policy

2026-03-23T18:16:16Z

- 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: Chuanyu Tseng Signed-off-by: Alex Deucher

drm/amd/display: Enable dcn42 DC clk_mgr

2026-03-11T17:58:06Z

Add support for DCN 4.2 clock manager. Acked-by: Aurabindo Pillai Signed-off-by: Roman Li Signed-off-by: Alex Hung Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Clean up unused code

2026-03-11T17:58:06Z

[WHAT] Silence warning by cleaning up unused code. Reviewed-by: Dillon Varone Signed-off-by: Clay King Signed-off-by: Alex Hung Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add ESD detection for replay recovery

2026-03-11T14:56:00Z

[HOW] Add Replay recovery flow so that when HPD occurs and ESD is detected, Replay can restore the system back to normal. Reviewed-by: Wenjing Liu Reviewed-by: Robin Chen Reviewed-by: Aric Cyr Signed-off-by: Weiguang Li Signed-off-by: Alex Hung Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Return early from vesa replay enable function

2026-03-11T14:53:20Z

[WHY & HOW] If the enable state is already as expect then just return. Reviewed-by: Robin Chen Reviewed-by: Wenjing Liu Signed-off-by: Peichen Huang Signed-off-by: Alex Hung Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Initialize replay_state to PR_STATE_INVALID

2026-03-02T21:39:02Z

[WHY & HOW] Initialize the replay_state variable to PR_STATE_INVALID instead of PR_STATE_0 before retrieving the actual replay state. Reviewed-by: Wenjing Liu Signed-off-by: Ivan Lipski Signed-off-by: Alex Hung Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Fix DPIA number and driver ID field issue

2026-02-23T19:39:31Z

[Why] The DPIA number field is 6 bits in the spec. In dp_type, it only defines 5 bits. The driver ID is only 4 bits in the spec. [How] Set DPIA number field size to 6. And only update 4 bits for driver id. Reviewed-by: Meenakshikumar Somasundaram Signed-off-by: Cruise Hung Signed-off-by: Ivan Lipski Tested-by: Dan Wheeler Signed-off-by: Alex Deucher