Commit 8396745d authored Sep 23, 2019 by Jaehyun Chung Committed by Alex Deucher Oct 10, 2019

drm/amd/display: Add capability check for static ramp calc



[Why]
Static ramp to max refresh rate does not have capability check on
calculated v_total. Programming a lower v_total_min and max than the
total causes continuous spurious HPDs.

[How]
Add a capability check after v_total calculation similar to calculate
v_total helper functions.

Signed-off-by: Jaehyun Chung <jaehyun.chung@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent fc067805

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

+4 −0

Original line number	Diff line number	Diff line
		@@ -234,6 +234,10 @@ static void update_v_total_for_static_ramp(
		current_duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
		stream->timing.h_total), 1000);

		/* v_total cannot be less than nominal */
		if (v_total < stream->timing.v_total)
		v_total = stream->timing.v_total;

		in_out_vrr->adjust.v_total_min = v_total;
		in_out_vrr->adjust.v_total_max = v_total;
		}

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