[PATCH] drm/amd/display: Add comment for NaN checks in DCN calcs

[Harry Wentland]

This is confusing as-is and really needs a comment.

Signed-off-by: Harry Wentland <harry.wentland at amd.com>
---
 drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_math.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_math.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_math.c
index b6abe0f3bb15..f95dc4ff9a23 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_math.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_math.c
@@ -27,6 +27,7 @@
 
 float dcn_bw_mod(const float arg1, const float arg2)
 {
+	/* NaN checks */
 	if (arg1 != arg1)
 		return arg2;
 	if (arg2 != arg2)
@@ -36,6 +37,7 @@ float dcn_bw_mod(const float arg1, const float arg2)
 
 float dcn_bw_min2(const float arg1, const float arg2)
 {
+	/* NaN checks */
 	if (arg1 != arg1)
 		return arg2;
 	if (arg2 != arg2)
@@ -45,6 +47,7 @@ float dcn_bw_min2(const float arg1, const float arg2)
 
 unsigned int dcn_bw_max(const unsigned int arg1, const unsigned int arg2)
 {
+	/* NaN checks */
 	if (arg1 != arg1)
 		return arg2;
 	if (arg2 != arg2)
@@ -53,6 +56,7 @@ unsigned int dcn_bw_max(const unsigned int arg1, const unsigned int arg2)
 }
 float dcn_bw_max2(const float arg1, const float arg2)
 {
+	/* NaN checks */
 	if (arg1 != arg1)
 		return arg2;
 	if (arg2 != arg2)
-- 
2.14.1