drm/amd/display: Remove phantom SW state ops from block sequence

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[Why]
HWS_APPLY_UPDATE_FLAGS_FOR_PHANTOM and HWS_UPDATE_PHANTOM_VP_POSITION
program no hardware. They only mutate driver state: pipe update flags,
the phantom plane viewport and the phantom scaling params.

A block sequence is built first and executed later, so both ops ran only
after the builder had already inspected pipe_ctx->update_flags to decide
which steps to emit. The phantom pipe was therefore built from stale
flags.

[How]
Call apply_update_flags_for_phantom() and update_phantom_vp_position()
directly from hwss_build_post_unlock_full_sequence(), before
program_pipe_sequence(), matching the legacy
dcn401_post_unlock_program_front_end() ordering.

Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Piotr Maziarz <piotr.maziarz@amd.com>
Signed-off-by: George Zhang <george.zhang@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Piotr Maziarz 2026-09-03 13:31:05 +02:00 • committed by Alex Deucher

parent 06421edfe7

commit 23c7a0a0ec

2 changed files with 5 additions and 61 deletions

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46

drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c

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20

drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h

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