1 files changed, 49 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2449-amdgpu-dc-use-kernel-ilog2-for-log_2.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2449-amdgpu-dc-use-kernel-ilog2-for-log_2.patch
new file mode 100644
index 00000000..d13154bb
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2449-amdgpu-dc-use-kernel-ilog2-for-log_2.patch
@@ -0,0 +1,49 @@
+From 8c709f5c43f3a51871847104fccc507afb6586a4 Mon Sep 17 00:00:00 2001
+From: Dave Airlie <airlied@redhat.com>
+Date: Tue, 3 Oct 2017 13:49:42 +1000
+Subject: [PATCH 2449/4131] amdgpu/dc: use kernel ilog2 for log_2.
+
+This should produce the same result.
+
+Signed-off-by: Dave Airlie <airlied@redhat.com>
+---
+ drivers/gpu/drm/amd/display/dc/basics/conversion.c | 10 ----------
+ drivers/gpu/drm/amd/display/dc/basics/conversion.h |  5 ++++-
+ 2 files changed, 4 insertions(+), 11 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.c b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
+index a2e22ae..23c9a0e 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 189325f..ade785c 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
+-- 
+2.7.4
+