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| author | Maíra Canal <mcanal@igalia.com> | 2023-05-12 13:40:44 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-19 17:21:18 +0300 |
| commit | 048b7168acf85cb856b0db1d0483584cfff3498f (patch) | |
| tree | ed68e94cdd14281e18f16d2a933e255b70d12ce7 /include | |
| parent | fa4ee16e814a41a2afcaa85d443dfa2a923e9e38 (diff) | |
| download | linux-048b7168acf85cb856b0db1d0483584cfff3498f.tar.xz | |
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@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@igalia.com
Stable-dep-of: ab87f558dcfb ("drm/vkms: Fix RGB565 pixel conversion")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drm_fixed.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/drm/drm_fixed.h b/include/drm/drm_fixed.h index 553210c02ee0..03cb890690e8 100644 --- a/include/drm/drm_fixed.h +++ b/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) |