Commit d76e393f authored Oct 02, 2018 by SivapiriyanKumarasamy Committed by Alex Deucher Nov 05, 2018

drm/amd/display: Fix incorrect end slope of EETF



Force the E2 to dc_fixpt_one when E1 exceeds that value. This is the
correct thing to do to avoid corruption.

Signed-off-by: SivapiriyanKumarasamy <sivapiriyan.kumarasamy@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent fa44604c

drivers/gpu/drm/amd/display/modules/color/color_gamma.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -789,7 +789,8 @@ static void hermite_spline_eetf(struct fixed31_32 input_x,
		// (t^3 - 2t^2 + t) * (1-ks)
		E2 = dc_fixpt_add(E2, dc_fixpt_mul(temp2,
		dc_fixpt_add(t, dc_fixpt_sub(t3, temp1))));
		}
		} else
		E2 = dc_fixpt_one;

		temp1 = dc_fixpt_sub(dc_fixpt_one, E2);
		temp2 = dc_fixpt_mul(temp1, temp1);

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