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drm/amd/display: Avoid programming DTO if Refclk is 0

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[Why]
Reference clock, either DPREFCLK or DTBCLK can be a value of 0
which then will encounter division by 0.

[How]
Avoid further calculation and programming if refclk is not
populated.

Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Acked-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Signed-off-by: Chris Park <chris.park@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Chris Park
2024-05-28 15:56:22 -04:00
committed by Alex Deucher
parent f2034ebb27
commit d3d996ec89
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c
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@@ -603,6 +603,10 @@ static void dccg401_set_dp_dto(
BREAK_TO_DEBUGGER();
return;
}
if (!params->refclk_hz) {
BREAK_TO_DEBUGGER();
return;
}
if (!dc_is_tmds_signal(params->signal)) {
uint64_t dto_integer;