From 8e3d7e30e34ffb181a600e12e74727737e0c1f76 Mon Sep 17 00:00:00 2001
From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Thu, 29 Sep 2016 10:55:19 +0300
Subject: Improve mode finding

Change calculated_vrefresh to round to 2 decimals, and do two rounds
when looking for a mode: first look for exact vrefresh match, then look
for rounded match.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 kms++/src/videomode.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'kms++/src/videomode.cpp')

diff --git a/kms++/src/videomode.cpp b/kms++/src/videomode.cpp
index 107ee3b..f675914 100644
--- a/kms++/src/videomode.cpp
+++ b/kms++/src/videomode.cpp
@@ -1,5 +1,6 @@
 #include <xf86drm.h>
 #include <xf86drmMode.h>
+#include <math.h>
 
 #include <kms++/kms++.h>
 #include "helpers.h"
@@ -18,7 +19,8 @@ unique_ptr<Blob> Videomode::to_blob(Card& card) const
 
 float Videomode::calculated_vrefresh() const
 {
-	return (clock * 1000.0) / (htotal * vtotal) * (interlace() ? 2 : 1);
+	float refresh = (clock * 1000.0) / (htotal * vtotal) * (interlace() ? 2 : 1);
+	return roundf(refresh * 100.0) / 100.0;
 }
 
 bool Videomode::interlace() const
-- 
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