linux/drivers/gpu/drm/amd/display/dc/dce, 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: Fixed silence signed/unsigned mismatch warnings

2026-03-30T18:55:39Z

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

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: add a no_hpd link_encoder_funcs variant

2026-03-24T17:35:28Z

For link encoders without HPD (analog or LVDS), add a link_encoder_funcs structure with no hpd enable callbacks. The enable and disable hpd callbacks are currently not used outside of a special case in debugfs which checks if the hpd is valid before using it, but this will protect us if they ever are. Reviewed-by: Srinivasan Shanmugam 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: Add documentation and cleanup DMUB HW lock manager

2026-03-11T15:02:03Z

To document how the helpers should be used before a subsequent change adds new locations that these helpers will be used. Reviewed-by: Ovidiu (Ovi) Bunea Signed-off-by: Nicholas Kazlauskas 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: Delete unused dce_clk_mgr.c

2026-02-23T19:26:11Z

This file was not compiled or included anywhere and not modified for years. And it has duplicate function definitions of many functions that are defined in other files. That leads to a lot of confusion (for both developers and for code editors), eg. when searching for a definition of a function it can end up on one of the functions in this file instead of the real implementations. I suspect that it was forgotten that this should be deleted after the various clock manager functions were split into hardware generation specific files. Delete it now. Signed-off-by: Timur Kristóf Reviewed-by: Rodrigo Siqueira Reviewed-by: Alex Hung Signed-off-by: Alex Deucher

drm/amd/display: Use dce_audio_create for DCE 6

2026-02-23T19:24:39Z

The only difference between DCE 6 and other DCE versions is that DCE 6 doesn't support DCCG_AUDIO_DTO2_USE_512FBR_DTO. Recently a check was added to dce_aud_wall_dto_setup() to check that. So now DCE 6 can just use dce_aud_wall_dto_setup() just like other DCE versions. Clean up DCE 6 specific audio functions which were otherwise identical to the rest. Signed-off-by: Timur Kristóf Reviewed-by: Rodrigo Siqueira Reviewed-by: Alex Hung Signed-off-by: Alex Deucher

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-22T04:03:00Z

This converts some of the visually simpler cases that have been split over multiple lines. I only did the ones that are easy to verify the resulting diff by having just that final GFP_KERNEL argument on the next line. Somebody should probably do a proper coccinelle script for this, but for me the trivial script actually resulted in an assertion failure in the middle of the script. I probably had made it a bit _too_ trivial. So after fighting that far a while I decided to just do some of the syntactically simpler cases with variations of the previous 'sed' scripts. The more syntactically complex multi-line cases would mostly really want whitespace cleanup anyway. Signed-off-by: Linus Torvalds