drm/amd/display: Program OPP formatter for plane-less ODM segments

Browse source

why:
When a display is disabled the surviving DSC stream is committed with no
planes but the dynamic ODM policy still expands it to a four to one
combine. The added plane-less segments skip program_pipe so their OPP
formatter is never configured. The DPG blank then feeds an unprogrammed
formatter and the OPTC input underflows which flashes grey on screen.

how:
Program the OPP formatter for each plane-less OPP head in update_odm and
update_odm_sequence the same way program_pipe does for planed pipes. Both
function pointers are checked for null before calling. Every ODM segment
now feeds valid data to the OPTC so the four to one combine no longer
underflows.

Signed-off-by: Ashwin Santhosh <Ashwin.Santhosh@amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com>
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Ashwin Santhosh 2026-09-17 10:16:29 -04:00 • committed by Alex Deucher

parent 0799087e27

commit c50a6195df

1 changed files with 30 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

30

drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c

View file