From: jsg <jsg@openbsd.org>
Date: Thu, 20 Jul 2023 08:33:02 +0000 (+0000)
Subject: drm: Add fixed-point helper to get rounded integer values
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=7f357f18dcf4910dd5b224696fa776d3329eafaa;p=openbsd

drm: Add fixed-point helper to get rounded integer values

From Maira Canal
048b7168acf85cb856b0db1d0483584cfff3498f in linux-6.1.y/6.1.39
8b25320887d7feac98875546ea0f521628b745bb in mainline linux
---

diff --git a/sys/dev/pci/drm/include/drm/drm_fixed.h b/sys/dev/pci/drm/include/drm/drm_fixed.h
index 553210c02ee..03cb890690e 100644
--- a/sys/dev/pci/drm/include/drm/drm_fixed.h
+++ b/sys/dev/pci/drm/include/drm/drm_fixed.h
@@ -70,6 +70,7 @@ static inline u32 dfixed_div(fixed20_12 A, fixed20_12 B)
 }
 
 #define DRM_FIXED_POINT		32
+#define DRM_FIXED_POINT_HALF	16
 #define DRM_FIXED_ONE		(1ULL << DRM_FIXED_POINT)
 #define DRM_FIXED_DECIMAL_MASK	(DRM_FIXED_ONE - 1)
 #define DRM_FIXED_DIGITS_MASK	(~DRM_FIXED_DECIMAL_MASK)
@@ -86,6 +87,11 @@ static inline int drm_fixp2int(s64 a)
 	return ((s64)a) >> DRM_FIXED_POINT;
 }
 
+static inline int drm_fixp2int_round(s64 a)
+{
+	return drm_fixp2int(a + (1 << (DRM_FIXED_POINT_HALF - 1)));
+}
+
 static inline int drm_fixp2int_ceil(s64 a)
 {
 	if (a > 0)