kernel/drivers/gpu/drm/amd/display/dc/sspl, branch linux-rolling-stable

drm/amd/display: Add debug option to override EASF scaler taps

2025-10-20T22:19:27Z

[Why & How] Add new option override_easf to use in_taps instead of internal taps policy for debugging Reviewed-by: Alvin Lee Signed-off-by: Samson Tam Signed-off-by: Aurabindo Pillai Signed-off-by: Alex Deucher

drm/amd/display: Incorrect Mirror Cositing

2025-10-07T18:09:20Z

[WHY] hinit/vinit are incorrect in the case of mirroring. [HOW] Cositing sign must be flipped when image is mirrored in the vertical or horizontal direction. Cc: Mario Limonciello Cc: Alex Deucher Cc: stable@vger.kernel.org Reviewed-by: Samson Tam Signed-off-by: Jesse Agate Signed-off-by: Brendan Leder Signed-off-by: Alex Hung Signed-off-by: Alex Deucher

drm/amd/display: Add custom segmentation support

2025-06-18T16:19:16Z

[WHY] Add support for uneven segmentation size [HOW] Currently width + x_start is automatically calculated using slice index + dividing stream into equally sized segments. Add override variables for dst_rect width and x Reviewed-by: Samson Tam Signed-off-by: Brendan Steve Leder Signed-off-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Do not bypass chroma scaling in 1:1 case

2025-06-03T19:35:53Z

[Why] When doing 2:1 downscaling on a YUV sub-sampled format, the chroma scaling ratio is 1:1. Since chroma has cositing, it is needed to do scaling on the chroma plane(s) and not to bypass chroma scaling. [How] Do not set the chroma taps to one when the chroma ratio is identity and the input format is a sub-sampled YUV format. Reviewed-by: Samson Tam Signed-off-by: Navid Assadian Signed-off-by: Wayne Lin Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: add support for 2nd sharpening range

2025-05-16T17:38:51Z

[Why & How] Add support for 2nd sharpening range for cases where we want override existing DCN sharpening range. Reviewed-by: Alvin Lee Signed-off-by: Samson Tam Signed-off-by: Tom Chung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: disable EASF narrow filter sharpening

2025-05-13T13:31:08Z

[Why & How] Default should be 1 to disable EASF narrow filter sharpening. Reviewed-by: Alvin Lee Signed-off-by: Samson Tam Signed-off-by: Ray Wu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Don't check for NULL divisor in fixpt code

2025-05-07T21:40:15Z

[Why] We check for a NULL divisor but don't act on it. This check does nothing other than throw a warning. It does confuse static checkers though: See https://lkml.org/lkml/2025/4/26/371 [How] Drop the ASSERTs in both DC and SPL variants. Fixes: 4562236b3bc0 ("drm/amd/dc: Add dc display driver (v2)") Fixes: 6efc0ab3b05d ("drm/amd/display: add back quality EASF and ISHARP and dc dependency changes") Signed-off-by: Harry Wentland Cc: Linus Torvalds Cc: Leo Li Cc: Alex Deucher Acked-by: Alex Deucher Reviewed-by: Alex Hung Signed-off-by: Alex Deucher

drm/amd/display: Always Scale Flag

2025-05-05T16:54:29Z

[Why & How] When always scale flag is set at the API level, the number of taps should not be overridden to zero in the identity scaling ratio case, and luma scale should not be set to bypass regardless of luma scale ratio Reviewed-by: Samson Tam Signed-off-by: Jesse Agate Signed-off-by: Ray Wu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Remove incorrect macro guard

2025-03-14T03:11:55Z

This macro guard "__cplusplus" is unnecessary and should not be there. Signed-off-by: Alex Hung Reviewed-by: Rodrigo Siqueira Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/amd/display: Remove unused header

2025-02-25T16:45:11Z

[Why] Removes unused header Reviewed-by: Samson Tam Signed-off-by: Krunoslav Kovac Signed-off-by: Zaeem Mohamed Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher