From: Vitaly Prosyak <vitaly.prosyak@amd.com>
Date: Fri, 24 Nov 2017 21:52:33 +0000 (-0600)
Subject: drm/amd/display: Correct fixed point calculation.
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=508f60e36a4288beb920b921924742c2b3e12a0d;p=openwrt%2Fstaging%2Fblogic.git

drm/amd/display: Correct fixed point calculation.

When convert from fixed31_32 to other fixed point
format use math operation round instead of floor.

Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Reviewed-by: Roman Li <Roman.Li@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.c b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
index 23c9a0ec0181..310964915a83 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/conversion.c
+++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
@@ -46,7 +46,7 @@ uint16_t fixed_point_to_int_frac(
 			arg));
 
 	if (d <= (uint16_t)(1 << integer_bits) - (1 / (uint16_t)divisor))
-		numerator = (uint16_t)dal_fixed31_32_floor(
+		numerator = (uint16_t)dal_fixed31_32_round(
 			dal_fixed31_32_mul_int(
 				arg,
 				divisor));