From d76e393f4cef8151c0a2178b6abeacecb9da4875 Mon Sep 17 00:00:00 2001 From: SivapiriyanKumarasamy Date: Tue, 2 Oct 2018 08:44:04 -0400 Subject: [PATCH] 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 Signed-off-by: Alex Deucher --- 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 2e215c9e5445..bba518684243 100644 --- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c +++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c @@ -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); -- 2.11.0