Commit c5980231 authored by Aric Cyr's avatar Aric Cyr Committed by Alex Deucher
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drm/amd/display: Properly round nominal frequency for SPD 



[Why]
Some displays rely on the SPD verticle frequency maximum value.
Must round the calculated refresh rate to the nearest integer.

[How]
Round the nominal calculated refresh rate to the nearest whole
integer.

Signed-off-by: default avatarAric Cyr <aric.cyr@amd.com>
Reviewed-by: default avatarAnthony Koo <Anthony.Koo@amd.com>
Acked-by: default avatarBhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 62f3abd1

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

+8 −5
Original line number Diff line number Diff line
@@ -743,6 +743,10 @@ void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync, 
	nominal_field_rate_in_uhz =

			mod_freesync_calc_nominal_field_rate(stream);



	/* Rounded to the nearest Hz */

	nominal_field_rate_in_uhz = 1000000ULL *

			div_u64(nominal_field_rate_in_uhz + 500000, 1000000);



	min_refresh_in_uhz = in_config->min_refresh_in_uhz;

	max_refresh_in_uhz = in_config->max_refresh_in_uhz;
@@ -998,14 +1002,13 @@ unsigned long long mod_freesync_calc_nominal_field_rate( 
			const struct dc_stream_state *stream)

{

	unsigned long long nominal_field_rate_in_uhz = 0;

	unsigned int total = stream->timing.h_total * stream->timing.v_total;



	/* Calculate nominal field rate for stream */

	/* Calculate nominal field rate for stream, rounded up to nearest integer */

	nominal_field_rate_in_uhz = stream->timing.pix_clk_100hz / 10;

	nominal_field_rate_in_uhz *= 1000ULL * 1000ULL * 1000ULL;

	nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz,

						stream->timing.h_total);

	nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz,

						stream->timing.v_total);



	nominal_field_rate_in_uhz =	div_u64(nominal_field_rate_in_uhz, total);



	return nominal_field_rate_in_uhz;

}

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