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drm/amd/display: Unify fast update classification paths

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[Why]
The dc_fast_update intermediate struct created code duplication and
complexity with multiple classification paths (populate_fast_updates,
fast_nonaddr_updates_exist, full_update_required). This refactoring
simplifies the update classification system by consolidating to a
single path while maintaining compatibility.

[How]
Remove entire dc_fast_update struct and associated helper functions:
- populate_fast_updates
- fast_nonaddr_updates_exist
- full_update_required

Refactor check_update_surfaces_for_stream as the
single classification path with explicit handling for func_shaper,
lut3d_func, cursor_csc_color_matrix_change, and
scaler_sharpener_update. Add a reserved bitfield to the
stream_update_flags union for completeness guards. Extract
dc_check_address_only_update and dc_check_update_surfaces_for_stream
as public.

Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Rafal Ostrowski <rafal.ostrowski@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>
This commit is contained in:
Rafal Ostrowski 2026-05-07 11:17:30 +02:00 • committed by Alex Deucher
commit 30ca154558
10 changed files with 58 additions and 272 deletions
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