kernel/linux.git/drivers/gpu/drm/amd/display/dc/dce, branch v6.18.21

drm/amd/display: Properly disable scaling on DCE6

2025-10-07T18:09:06+00:00

SCL_SCALER_ENABLE can be used to enable/disable the scaler on DCE6. Program it to 0 when scaling isn't used, 1 when used. Additionally, clear some other registers when scaling is disabled and program the SCL_UPDATE register as recommended. This fixes visible glitches for users whose BIOS sets up a mode with scaling at boot, which DC was unable to clean up. Fixes: b70aaf5586f2 ("drm/amd/display: dce_transform: add DCE6 specific macros,functions") Reviewed-by: Alex Deucher Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/display: Properly clear SCL_*_FILTER_CONTROL on DCE6

2025-10-07T18:09:06+00:00

Previously, the code would set a bit field which didn't exist on DCE6 so it would be effectively a no-op. Fixes: b70aaf5586f2 ("drm/amd/display: dce_transform: add DCE6 specific macros,functions") Reviewed-by: Alex Deucher Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/display: Add missing DCE6 SCL_HORZ_FILTER_INIT* SRIs

2025-10-07T18:09:06+00:00

Without these, it's impossible to program these registers. Fixes: 102b2f587ac8 ("drm/amd/display: dce_transform: DCE6 Scaling Horizontal Filter Init (v2)") Reviewed-by: Alex Deucher Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/display: Add fast sync field in ultra sleep more for DMUB

2025-09-23T14:31:35+00:00

[Why&How] We need to inform DMUB whether fast sync in ultra sleep mode is supported, so that it can disable desync error detection when the it is not enabled. This helps prevent unexpected desync errors when transitioning out of ultra sleep mode. Add fast sync in ultra sleep mode field in replay copy setting command. Reviewed-by: Robin Chen Reviewed-by: Nicholas Kazlauskas Signed-off-by: Allen Li Signed-off-by: Ivan Lipski Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Rename header file link.h to link_service.h

2025-09-15T20:57:29+00:00

[WHY] Header file name "link.h" collides with system header when dc is compiled as a user-mode library [WHAT] Rename link.h to link_service.h to avoid name collision Reviewed-by: Alvin Lee Signed-off-by: Wesley Chalmers Signed-off-by: Ray Wu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add link index in AUX and dpms

2025-09-05T21:38:40+00:00

[Why & How] Add the link index in DP AUX transfer and DPMS functions. Reviewed-by: Wenjing Liu Signed-off-by: Cruise Hung Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Incorrect 'not' operator usage

2025-08-27T17:57:50+00:00

Consolidating multiple CodeQL Fixes for alerts with rule id: cpp/incorrect-not-operator-usage Reviewed-by: Joshua Aberback Signed-off-by: Clay King Signed-off-by: Aurabindo Pillai Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add control flags to force PSR / replay

2025-08-27T17:57:49+00:00

To change PSR/Replay behavior based on OS preferences, add some config options. Reviewed-by: Nicholas Kazlauskas Signed-off-by: Karthi Kandasamy Signed-off-by: Aurabindo Pillai Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Don't warn when missing DCE encoder caps

2025-08-18T21:04:06+00:00

On some GPUs the VBIOS just doesn't have encoder caps, or maybe not for every encoder. This isn't really a problem and it's handled well, so let's not litter the logs with it. Signed-off-by: Timur Kristóf Acked-by: Alex Deucher Reviewed-by: Rodrigo Siqueira Reviewed-by: Alex Hung Signed-off-by: Alex Deucher

drm/amd/display: Add eDP AUXless ALPM

2025-07-28T20:40:31+00:00

[Why & How] Add AUX-less ALPM capability check and initialization Reviewed-by: Charlene Liu Signed-off-by: Duncan Ma Signed-off-by: Ivan Lipski Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher