tree 2851e6d58286333cb72df4ecdd7f67f7c72c9795
parent c6851841fc877d9e4361eeaa1e3851778fa440c4
author Alvin Lee <alvin.lee2@amd.com> 1594753600 -0400
committer Alex Deucher <alexander.deucher@amd.com> 1596746296 -0400

drm/amd/display: Don't compare dppclk before updating DTO

[Why]
In dcn3_update_clocks there are situations where dppclk is not
lowered (i.e. stays the same), but DTO still needs to be increased
before we program pipe frontend (i.e. in prepare_bandwidth). If we
don't program the new DTO value before we program the pipe,
we will underflow as soon as the pipe lock is released until the
next call to dcn3_update_clocks where the DTO is updated.

[How]
Remove dppclk check before programming new DTO value.

Signed-off-by: Alvin Lee <alvin.lee2@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>