drm/amd/display: Test DCC reject for multi-plane format

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[WHAT]
Extend the amdgpu_dm_plane_format_mod_supported() test to cover the
rejection of a format that carries an extra plane alongside a DCC
modifier.

[HOW]
Reuse the existing GFX9 DCC modifier and ask for XRGB8888_A8, whose
4 bytes-per-pixel main plane passes the bpp check but whose alpha
plane collides with the DCC metadata plane.

Assisted-by: Copilot:Claude-Opus-5
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Alex Hung 2026-08-29 13:38:06 -06:00 • committed by Alex Deucher

parent 910e234895

commit 80065ab5bc

1 changed files with 5 additions and 0 deletions

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

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