From: Maíra Canal mcanal@igalia.com
[ 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@igalia.com Reviewed-by: Arthur Grillo arthurgrillo@riseup.net Signed-off-by: Maíra Canal mairacanal@riseup.net Link: https://patchwork.freedesktop.org/patch/msgid/20230512104044.65034-1-mcanal@... Stable-dep-of: ab87f558dcfb ("drm/vkms: Fix RGB565 pixel conversion") Signed-off-by: Sasha Levin sashal@kernel.org --- include/drm/drm_fixed.h | 6 ++++++ 1 file changed, 6 insertions(+)
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)