This is a note to let you know that I've just added the patch titled
drm: Add fixed-point helper to get rounded integer values
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-add-fixed-point-helper-to-get-rounded-integer-va.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b4eec99cad6d7fb48fbf1626b9e98223162339c1
Author: Maíra Canal <mcanal@xxxxxxxxxx>
Date: Fri May 12 07:40:44 2023 -0300
drm: Add fixed-point helper to get rounded integer values
[ Upstream commit 8b25320887d7feac98875546ea0f521628b745bb ]
Create a new fixed-point helper to allow us to return the rounded value
of our fixed point value.
[v2]:
* Create the function drm_fixp2int_round() (Melissa Wen).
[v3]:
* Use drm_fixp2int() instead of shifting manually (Arthur Grillo).
Signed-off-by: Maíra Canal <mcanal@xxxxxxxxxx>
Reviewed-by: Arthur Grillo <arthurgrillo@xxxxxxxxxx>
Signed-off-by: Maíra Canal <mairacanal@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230512104044.65034-1-mcanal@xxxxxxxxxx
Stable-dep-of: ab87f558dcfb ("drm/vkms: Fix RGB565 pixel conversion")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/drm/drm_fixed.h b/include/drm/drm_fixed.h
index 255645c1f9a89..6ea339d5de088 100644
--- a/include/drm/drm_fixed.h
+++ b/include/drm/drm_fixed.h
@@ -71,6 +71,7 @@ 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)
@@ -87,6 +88,11 @@ 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)
