drm/amd/display: Add reset_state existing-state branch test

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why:
amdgpu_dm_crtc_reset_state has a branch that destroys an already-installed
crtc state before allocating a new one. Only the NULL-state branch was
covered, leaving the state-replacement path untested.

how:
Add dm_test_crtc_reset_state_replaces_existing, which installs a plain
dm_crtc_state holding an extra stream reference, calls reset_state, and
verifies the old state was destroyed (stream ref dropped) and a fresh
non-NULL state was installed. Register the new case under the existing
reset_state group.

Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Bhawanpreet Lakha 2026-07-23 16:25:54 -04:00 • committed by Alex Deucher

parent b40f65c125

commit fa67092e46

1 changed files with 43 additions and 0 deletions

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

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