diff options
| author | TungYu Lu <tungyu.lu@amd.com> | 2025-04-11 10:41:48 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-04-22 08:51:45 -0400 |
| commit | 33bc89949b4366dff2dca30bc61ba1c0cbcd2ab2 (patch) | |
| tree | 2d6a1522dfe37ecd8e70564415677e29b0c69a66 /drivers/gpu/drm/amd/display/dc/dml/dcn30 | |
| parent | 19e743f0fb730e4dac43e37bb71d1ebdb622b3cf (diff) | |
drm/amd/display: Correct prefetch calculation
[Why]
The minimum value of the dst_y_prefetch_equ was not correct
in prefetch calculation whice causes OPTC underflow.
[How]
Add the min operation of dst_y_prefetch_equ in prefetch calculation
for legacy DML.
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: TungYu Lu <tungyu.lu@amd.com>
Signed-off-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Tested-by: Mark Broadworth <mark.broadworth@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dml/dcn30')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c b/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c index f1fe49401bc0..8d24763938ea 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c @@ -1002,6 +1002,7 @@ static bool CalculatePrefetchSchedule( dst_y_prefetch_equ = VStartup - (Tsetup + dml_max(TWait + TCalc, *Tdmdl)) / LineTime - (*DSTYAfterScaler + *DSTXAfterScaler / myPipe->HTotal); + dst_y_prefetch_equ = dml_min(dst_y_prefetch_equ, 63.75); // limit to the reg limit of U6.2 for DST_Y_PREFETCH Lsw_oto = dml_max(PrefetchSourceLinesY, PrefetchSourceLinesC); Tsw_oto = Lsw_oto * LineTime; |