drm/amd/display: Fix zero dlg_reg write to program_ext_vblank

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[why]
fix some non initialized reg_offset
allow z8_only to program_ext_vblank

[CLEANED]
for dml2.1, dlg_reg moved inside hubp_reg
add current_compbuf_size check ensure HW state reached.

Partial application: DCN42 register-list additions only.

Fixes: 0a5e0416e1 ("drm/amd/display: Add DCN42B code to DC")
Fixes: 002f32db0d ("drm/amd/display: Fix dcn401_optimize_bandwidth")
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com>
Reviewed-by: Dmytro Laktyushkin <dmytro.laktyushkin@amd.com>
Reviewed-by: Leo Chen <leo.chen@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Charlene Liu 2026-09-21 15:15:07 -04:00 • committed by Alex Deucher

parent 44139872f2

commit 6497a922e7

1 changed files with 6 additions and 1 deletions

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drivers/gpu/drm/amd/display/dc/hubbub/dcn42/dcn42_hubbub.h

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