drm/amd/display: Test plane reset decision

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[WHAT]
Add KUnit tests for should_reset_plane() covering the pre-DCN3.2 modeset
hack, a writeback commit, a plane moved between CRTCs, a plane outside the
context, a missing new CRTC state, a cursor mode switch, color management,
z-order, modeset, and the fast update baseline.

Also cover the cross-plane loop: cursor planes and planes on other CRTCs
are skipped, while a moved plane, source or destination size, rotation,
blend mode, alpha, colorspace, transfer function, pixel format and
modifier changes each force a reset, and a plane missing one framebuffer
is skipped.

Assisted-by: Copilot:Claude-Opus-5 GPT-5.6-Sol
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Alex Hung 2026-08-13 14:04:55 -06:00 • committed by Alex Deucher

parent 9885f7d5bd

commit d0f8af4787

3 changed files with 518 additions and 4 deletions

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9

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

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4

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h

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509

drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_test.c

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