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drm/i915: take-out common clamping code of fixed16 wrappers

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This patch creates a new function for clamping u64 to fixed16.
And make use of this function in other fixed16 wrappers.

Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170705143154.32132-2-mahesh1.kumar@intel.com
This commit is contained in:
Kumar, Mahesh 2017-07-05 20:01:44 +05:30 committed by Maarten Lankhorst
parent 61f3e77048
commit 07ab976d19
1 changed files with 12 additions and 16 deletions
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28
drivers/gpu/drm/i915/i915_drv.h
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@ -160,6 +160,14 @@ static inline uint_fixed_16_16_t max_fixed_16_16(uint_fixed_16_16_t max1,
return max;
}
static inline uint_fixed_16_16_t clamp_u64_to_fixed16(uint64_t val)
{
uint_fixed_16_16_t fp;
WARN_ON(val >> 32);
fp.val = clamp_t(uint32_t, val, 0, ~0);
return fp;
}
static inline uint32_t div_round_up_fixed16(uint_fixed_16_16_t val,
uint_fixed_16_16_t d)
{
@ -170,26 +178,21 @@ static inline uint32_t mul_round_up_u32_fixed16(uint32_t val,
uint_fixed_16_16_t mul)
{
uint64_t intermediate_val;
uint32_t result;
intermediate_val = (uint64_t) val * mul.val;
intermediate_val = DIV_ROUND_UP_ULL(intermediate_val, 1 << 16);
WARN_ON(intermediate_val >> 32);
result = clamp_t(uint32_t, intermediate_val, 0, ~0);
return result;
return clamp_t(uint32_t, intermediate_val, 0, ~0);
}
static inline uint_fixed_16_16_t mul_fixed16(uint_fixed_16_16_t val,
uint_fixed_16_16_t mul)
{
uint64_t intermediate_val;
uint_fixed_16_16_t fp;
intermediate_val = (uint64_t) val.val * mul.val;
intermediate_val = intermediate_val >> 16;
WARN_ON(intermediate_val >> 32);
fp.val = clamp_t(uint32_t, intermediate_val, 0, ~0);
return fp;
return clamp_u64_to_fixed16(intermediate_val);
}
static inline uint_fixed_16_16_t fixed_16_16_div(uint32_t val, uint32_t d)
@ -203,15 +206,11 @@ static inline uint_fixed_16_16_t fixed_16_16_div(uint32_t val, uint32_t d)
static inline uint_fixed_16_16_t fixed_16_16_div_u64(uint32_t val, uint32_t d)
{
uint_fixed_16_16_t res;
uint64_t interm_val;
interm_val = (uint64_t)val << 16;
interm_val = DIV_ROUND_UP_ULL(interm_val, d);
WARN_ON(interm_val >> 32);
res.val = (uint32_t) interm_val;
return res;
return clamp_u64_to_fixed16(interm_val);
}
static inline uint32_t div_round_up_u32_fixed16(uint32_t val,
@ -229,12 +228,9 @@ static inline uint_fixed_16_16_t mul_u32_fixed_16_16(uint32_t val,
uint_fixed_16_16_t mul)
{
uint64_t intermediate_val;
uint_fixed_16_16_t fp;
intermediate_val = (uint64_t) val * mul.val;
WARN_ON(intermediate_val >> 32);
fp.val = (uint32_t) intermediate_val;
return fp;
return clamp_u64_to_fixed16(intermediate_val);
}
static inline const char *yesno(bool v)