diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.c b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
index a2e22ae12adbc3582200899e34ae65b1c05504fc..23c9a0ec01817c6a23be8fdbbd5ecbdf5816c585 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/conversion.c
+++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
@@ -102,13 +102,3 @@ void convert_float_matrix(
 		matrix[i] = (uint16_t)reg_value;
 	}
 }
-
-unsigned int log_2(unsigned int num)
-{
-	unsigned int result = 0;
-
-	while ((num >>= 1) != 0)
-		result++;
-
-	return result;
-}
diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.h b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
index 189325f68cfdc0422815989699c739dc99f23317..ade785c4fdc7dc1fbd347d9dbb22bb9bb8336464 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/conversion.h
+++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
@@ -38,6 +38,9 @@ void convert_float_matrix(
 	struct fixed31_32 *flt,
 	uint32_t buffer_size);
 
-unsigned int log_2(unsigned int num);
+static inline unsigned int log_2(unsigned int num)
+{
+	return ilog2(num);
+}
 
 #endif