[PATCH 23/27] drm/amd/display: fix dml log2 function

Rodrigo Siqueira Rodrigo.Siqueira at amd.com
Fri May 15 18:13:10 UTC 2020

From: Dmytro Laktyushkin <Dmytro.Laktyushkin at amd.com>

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 at amd.com>
Reviewed-by: Eric Bernstein <Eric.Bernstein at amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira at amd.com>
 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)

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