From: Vitaly Prosyak <vitaly.prosyak@amd.com>
Date: Fri, 24 Nov 2017 15:52:33 -0600
Subject: drm/amd/display: Correct fixed point calculation.
Git-commit: 508f60e36a4288beb920b921924742c2b3e12a0d
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
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>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/display/dc/basics/conversion.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- 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));