From 74bc5d8dfd1da9b570159b1708c42273ef913e0f Mon Sep 17 00:00:00 2001 From: SivapiriyanKumarasamy Date: Tue, 2 Oct 2018 08:44:04 -0400 Subject: [PATCH 5596/5725] 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 Reviewed-by: Krunoslav Kovac Acked-by: Bhawanpreet Lakha --- drivers/gpu/drm/amd/display/modules/color/color_gamma.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c index 423e8c1..7b10c74 100644 --- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c +++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c @@ -791,7 +791,8 @@ 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); -- 2.7.4