diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/4458-drm-amd-display-add-fixed-point-fractional-bit-trunc.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.14.71/4458-drm-amd-display-add-fixed-point-fractional-bit-trunc.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/4458-drm-amd-display-add-fixed-point-fractional-bit-trunc.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/4458-drm-amd-display-add-fixed-point-fractional-bit-trunc.patch new file mode 100644 index 00000000..ac6b3b60 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/4458-drm-amd-display-add-fixed-point-fractional-bit-trunc.patch @@ -0,0 +1,42 @@ +From 087833951a00439a47fd83d4ce587e55e83acde9 Mon Sep 17 00:00:00 2001 +From: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com> +Date: Wed, 18 Apr 2018 14:11:43 -0400 +Subject: [PATCH 4458/5725] drm/amd/display: add fixed point fractional bit + truncation function + +Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com> +Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> +Acked-by: Harry Wentland <harry.wentland@amd.com> +--- + drivers/gpu/drm/amd/display/include/fixed31_32.h | 17 +++++++++++++++++ + 1 file changed, 17 insertions(+) + +diff --git a/drivers/gpu/drm/amd/display/include/fixed31_32.h b/drivers/gpu/drm/amd/display/include/fixed31_32.h +index ebfd33e..61f11e2 100644 +--- a/drivers/gpu/drm/amd/display/include/fixed31_32.h ++++ b/drivers/gpu/drm/amd/display/include/fixed31_32.h +@@ -496,4 +496,21 @@ unsigned int dc_fixpt_clamp_u0d10(struct fixed31_32 arg); + + int dc_fixpt_s4d19(struct fixed31_32 arg); + ++static inline struct fixed31_32 dc_fixpt_truncate(struct fixed31_32 arg, unsigned int frac_bits) ++{ ++ bool negative = arg.value < 0; ++ ++ if (frac_bits >= FIXED31_32_BITS_PER_FRACTIONAL_PART) { ++ ASSERT(frac_bits == FIXED31_32_BITS_PER_FRACTIONAL_PART); ++ return arg; ++ } ++ ++ if (negative) ++ arg.value = -arg.value; ++ arg.value &= (~0LL) << (FIXED31_32_BITS_PER_FRACTIONAL_PART - frac_bits); ++ if (negative) ++ arg.value = -arg.value; ++ return arg; ++} ++ + #endif +-- +2.7.4 + |