drm/amd/display: Test CRTC memory domain change detection

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[WHAT]
Add KUnit tests for amdgpu_dm_crtc_mem_type_changed() covering an empty
plane mask, a plane missing one of its states, framebuffers in the same
memory domain, and a framebuffer migrated between domains.

[HOW]
Back the framebuffers with fake buffer objects carrying a TTM resource, so
get_mem_type() resolves a memory domain without a live TTM device.

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>

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This commit is contained in:

Alex Hung 2026-08-13 14:03:50 -06:00 • committed by Alex Deucher

parent 0e956130a2

commit 3bc69baf5e

3 changed files with 145 additions and 3 deletions

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7

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

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3

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

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138

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

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