diff options
| author | Clay King <clayking@amd.com> | 2025-08-20 15:04:29 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-08-29 10:14:05 -0400 |
| commit | 306cbcc6f687d791ab3cc8fbbe30f5286fd0d1e5 (patch) | |
| tree | 82a2266bf83a8e496b4c4af3b92fd70145e39ea3 | |
| parent | cf49a454e16675fad59c1080f909a7e51192a494 (diff) | |
drm/amd/display: incorrect conditions for failing dto calculations
[Why & How]
Previously, when calculating dto phase, we would incorrectly fail when phase
<=0 without additionally checking for the integer value. This meant that
calculations would incorrectly fail when the desired pixel clock was an exact
multiple of the reference clock.
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Clay King <clayking@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c b/drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c index 668ee2d405fd..0b8ed9b94d3c 100644 --- a/drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c +++ b/drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c @@ -619,7 +619,7 @@ void dccg401_set_dp_dto( dto_integer = div_u64(params->pixclk_hz, dto_modulo_hz); dto_phase_hz = params->pixclk_hz - dto_integer * dto_modulo_hz; - if (dto_phase_hz <= 0) { + if (dto_phase_hz <= 0 && dto_integer <= 0) { /* negative pixel rate should never happen */ BREAK_TO_DEBUGGER(); return; |