From f774b377b454b5811c8bd9cc6f7bebad5b67d34d Mon Sep 17 00:00:00 2001
From: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Date: Fri, 1 May 2020 15:43:09 -0400
Subject: drm/amd/display: fix dml log2 function
Git-commit: 1649bbe01ba950c83ac6f8d83db7dd69ffc7e056
Patch-mainline: v5.9-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322

This change removes internal rounding in dml_log2 function.

Dml_log2 is expected to return a float output. In case an int is needed
dml will floor the output on it's own.

Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Eric Bernstein <Eric.Bernstein@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/dc/dml/dml_inline_defs.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dml_inline_defs.h b/drivers/gpu/drm/amd/display/dc/dml/dml_inline_defs.h
index 02e06c9b3230..ab0870e2a103 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dml_inline_defs.h
+++ b/drivers/gpu/drm/amd/display/dc/dml/dml_inline_defs.h
@@ -86,9 +86,9 @@ static inline double dml_round(double a)
 		return floor;
 }
 
-static inline int dml_log2(double x)
+static inline double dml_log2(double x)
 {
-	return dml_round((double)dcn_bw_log(x, 2));
+	return (double) dcn_bw_log(x, 2);
 }
 
 static inline double dml_pow(double a, int exp)
-- 
2.29.2