From d3d996ec8905a0098f160d7a4dcca2b54d48d697 Mon Sep 17 00:00:00 2001 From: Chris Park Date: Tue, 28 May 2024 15:56:22 -0400 Subject: [PATCH] drm/amd/display: Avoid programming DTO if Refclk is 0 [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 Acked-by: Zaeem Mohamed Signed-off-by: Chris Park Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c | 4 ++++ 1 file changed, 4 insertions(+) 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 3538e190f2175..dac31c4cf2a78 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 @@ -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; -- 2.39.5