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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/i915/i915_fixed.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_fixed.h')
-rw-r--r-- | drivers/gpu/drm/i915/i915_fixed.h | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_fixed.h b/drivers/gpu/drm/i915/i915_fixed.h new file mode 100644 index 0000000000..a327094de2 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_fixed.h @@ -0,0 +1,148 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2018 Intel Corporation + */ + +#ifndef _I915_FIXED_H_ +#define _I915_FIXED_H_ + +#include <linux/bug.h> +#include <linux/kernel.h> +#include <linux/math64.h> +#include <linux/types.h> + +typedef struct { + u32 val; +} uint_fixed_16_16_t; + +#define FP_16_16_MAX ((uint_fixed_16_16_t){ .val = UINT_MAX }) + +static inline bool is_fixed16_zero(uint_fixed_16_16_t val) +{ + return val.val == 0; +} + +static inline uint_fixed_16_16_t u32_to_fixed16(u32 val) +{ + uint_fixed_16_16_t fp = { .val = val << 16 }; + + WARN_ON(val > U16_MAX); + + return fp; +} + +static inline u32 fixed16_to_u32_round_up(uint_fixed_16_16_t fp) +{ + return DIV_ROUND_UP(fp.val, 1 << 16); +} + +static inline u32 fixed16_to_u32(uint_fixed_16_16_t fp) +{ + return fp.val >> 16; +} + +static inline uint_fixed_16_16_t min_fixed16(uint_fixed_16_16_t min1, + uint_fixed_16_16_t min2) +{ + uint_fixed_16_16_t min = { .val = min(min1.val, min2.val) }; + + return min; +} + +static inline uint_fixed_16_16_t max_fixed16(uint_fixed_16_16_t max1, + uint_fixed_16_16_t max2) +{ + uint_fixed_16_16_t max = { .val = max(max1.val, max2.val) }; + + return max; +} + +static inline uint_fixed_16_16_t clamp_u64_to_fixed16(u64 val) +{ + uint_fixed_16_16_t fp = { .val = (u32)val }; + + WARN_ON(val > U32_MAX); + + return fp; +} + +static inline u32 div_round_up_fixed16(uint_fixed_16_16_t val, + uint_fixed_16_16_t d) +{ + return DIV_ROUND_UP(val.val, d.val); +} + +static inline u32 mul_round_up_u32_fixed16(u32 val, uint_fixed_16_16_t mul) +{ + u64 tmp; + + tmp = mul_u32_u32(val, mul.val); + tmp = DIV_ROUND_UP_ULL(tmp, 1 << 16); + WARN_ON(tmp > U32_MAX); + + return (u32)tmp; +} + +static inline uint_fixed_16_16_t mul_fixed16(uint_fixed_16_16_t val, + uint_fixed_16_16_t mul) +{ + u64 tmp; + + tmp = mul_u32_u32(val.val, mul.val); + tmp = tmp >> 16; + + return clamp_u64_to_fixed16(tmp); +} + +static inline uint_fixed_16_16_t div_fixed16(u32 val, u32 d) +{ + u64 tmp; + + tmp = (u64)val << 16; + tmp = DIV_ROUND_UP_ULL(tmp, d); + + return clamp_u64_to_fixed16(tmp); +} + +static inline u32 div_round_up_u32_fixed16(u32 val, uint_fixed_16_16_t d) +{ + u64 tmp; + + tmp = (u64)val << 16; + tmp = DIV_ROUND_UP_ULL(tmp, d.val); + WARN_ON(tmp > U32_MAX); + + return (u32)tmp; +} + +static inline uint_fixed_16_16_t mul_u32_fixed16(u32 val, uint_fixed_16_16_t mul) +{ + u64 tmp; + + tmp = mul_u32_u32(val, mul.val); + + return clamp_u64_to_fixed16(tmp); +} + +static inline uint_fixed_16_16_t add_fixed16(uint_fixed_16_16_t add1, + uint_fixed_16_16_t add2) +{ + u64 tmp; + + tmp = (u64)add1.val + add2.val; + + return clamp_u64_to_fixed16(tmp); +} + +static inline uint_fixed_16_16_t add_fixed16_u32(uint_fixed_16_16_t add1, + u32 add2) +{ + uint_fixed_16_16_t tmp_add2 = u32_to_fixed16(add2); + u64 tmp; + + tmp = (u64)add1.val + tmp_add2.val; + + return clamp_u64_to_fixed16(tmp); +} + +#endif /* _I915_FIXED_H_ */ |