linux/drivers/gpu/drm/amd/display/dc/mpc, 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

drm/amd/display: Fix Silence signed/unsighed mismatch warning in dc

2026-03-30T18:55:17Z

[Why] Implicit signed-to-unsigned conversions caused compiler warnings in DC paths. [How] Added explicit (unsigned int)/(uint32_t) casts for sentinel -1 assignments and IRQ ~MASK initializers, with small cast alignment in logging/DPCD code. Functionality and behavior is unchanged; only type intent is explicit. Reviewed-by: Dillon Varone Signed-off-by: Gaghik Khachatrian Signed-off-by: Chuanyu Tseng Signed-off-by: Alex Deucher

drm/amd/display: Sync dcn42 with DC 3.2.373

2026-03-11T17:58:07Z

This patch provides a bulk merge to align driver support for DCN42 with Display Core version 3.2.373. It includes upgrade for: - clk_mgr - dml2/dml21 - optc - hubp - mpc - optc - hwseq 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: Enable dcn42 DC

2026-02-23T19:28:33Z

Add support for DCN 4.2 in Display Core Signed-off-by: Roman Li Acked-by: Harry Wentland Signed-off-by: Alex Deucher

drm/amd/display: Add dcn42 DC resources

2026-02-23T19:28:33Z

Display Core resources for DCN 4.2: - CLK_MGR - DCCG - DIO - DPP - GPIO - HPO - HUBBUB - HUBP - HWSS - IRQ - MMHUBBUB - MPC - OPTC - PG Signed-off-by: Roman Li Acked-by: Harry Wentland Signed-off-by: Alex Deucher

drm/amd/display: Remove conditional for shaper 3DLUT power-on

2026-02-19T17:16:11Z

[Why] Shaper programming has high chance to fail on first time after power-on or reboot. This can be verified by running IGT's kms_colorop. [How] Always power on the shaper and 3DLUT before programming by removing the debug flag of low power mode. Reviewed-by: Aurabindo Pillai Signed-off-by: Alex Hung Signed-off-by: Ray Wu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add more DC HW state info to underflow logging

2025-10-28T13:57:44Z

[Why] Debugging underflow issues frequently requires knowing the HW state at the time of underflow. To enable capturing this HW state information, interface functions are needed for the various DC HW blocks. [How] This change adds the interface functions to read HW state for the following DC HW blocks: - HUBBUB - HUBP - DPP - MPC - OPP - DSC - OPTC - DCCG Reviewed-by: George Shen Signed-off-by: Karen Chen Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Delete unused functions

2025-08-18T20:57:22Z

[WHAT] Removing unused code Reviewed-by: Joshua Aberback Signed-off-by: Clay King Signed-off-by: Alex Hung Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Initialize mode_select to 0

2025-06-24T13:55:43Z

[WHAT] mode_select was supposed to be initialized in mpc_read_gamut_remap but is not set in default case. This can cause indeterminate behaviors. This is reported as an UNINIT error by Coverity. Reviewed-by: Aurabindo Pillai Signed-off-by: Alex Hung Signed-off-by: Fangzhi Zuo Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher