drm/amd/display: Guard DST_Y_PREFETCH register overflow in DCN21

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[why]
DST_Y_PREFETCH can overflow when DestinationLinesForPrefetch values are
too large due to the former being limited to 8 bits.

[how]
Set the maximum value of DestinationLinesForPrefetch to be 255 * refclk
period.

Reviewed-by: Laktyushkin Dmytro <dmytro.laktyushkin@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: Victor Lu <victorchengchi.lu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Victor Lu 2021-07-08 14:50:48 -04:00 • committed by Alex Deucher

parent 91b03fc6b5

commit 9857bb9457

1 changed files with 3 additions and 0 deletions

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drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c

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