Commit 7cc9e7a6 authored by Eric Cook's avatar Eric Cook Committed by Alex Deucher
Browse files

drm/amd/display: Check for Zero Range in FreeSync Calc 



-check for min/max range in freesync calculation and handle it accordingly

Signed-off-by: default avatarEric <eric.cook@amd.com>
Acked-by: default avatarHarry Wentland <Harry.Wentland@amd.com>
Reviewed-by: default avatarAnthony Koo <Anthony.Koo@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 1c29313b

drivers/gpu/drm/amd/display/modules/freesync/freesync.c

+15 −0
Original line number Diff line number Diff line
@@ -363,6 +363,21 @@ static void calc_freesync_range(struct core_freesync *core_freesync, 
	unsigned int index = map_index_from_stream(core_freesync, stream);

	uint32_t vtotal = stream->timing.v_total;



	if ((min_refresh_in_uhz == 0) || (max_refresh_in_uhz == 0)) {

		state->freesync_range.min_refresh =

				state->nominal_refresh_rate_in_micro_hz;

		state->freesync_range.max_refresh =

				state->nominal_refresh_rate_in_micro_hz;



		state->freesync_range.max_frame_duration = 0;

		state->freesync_range.min_frame_duration = 0;



		state->freesync_range.vmax = vtotal;

		state->freesync_range.vmin = vtotal;



		return;

	}



	min_frame_duration_in_ns = ((unsigned int) (div64_u64(

					(1000000000ULL * 1000000),

					max_refresh_in_uhz)));