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drm/amd/display: Fix 64 bit modulus operation using div64 API

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[why]
Synchronization displays with different timings feature uses
reminder of 64 bit division (modulus operator) , which is not
supported by 32 bit platforms

[how]
Use div64 API for 64 bit modulus

Signed-off-by: Vladimir Stempen <vladimir.stempen@amd.com>
Tested-by: Bindu Ramamurthy<bindu.r@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Vladimir Stempen 2021-02-25 19:09:46 -05:00 committed by Alex Deucher
parent 783bf4035c
commit a8a2e13486
1 changed files with 10 additions and 5 deletions
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15
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
View File

@ -1893,16 +1893,21 @@ uint64_t reduceSizeAndFraction(
num = *numerator;
denom = *denominator;
for (i = 0; i < count; i++) {
uint32_t num_reminder, denom_reminder;
uint64_t num_result, denom_result;
if (checkUint32Bounary &&
num <= max_int32 && denom <= max_int32) {
ret = true;
break;
}
while (num % prime_numbers[i] == 0 &&
denom % prime_numbers[i] == 0) {
num = div_u64(num, prime_numbers[i]);
denom = div_u64(denom, prime_numbers[i]);
}
do {
num_result = div_u64_rem(num, prime_numbers[i], &num_reminder);
denom_result = div_u64_rem(denom, prime_numbers[i], &denom_reminder);
if (num_reminder == 0 && denom_reminder == 0) {
num = num_result;
denom = denom_result;
}
} while (num_reminder == 0 && denom_reminder == 0);
}
*numerator = num;
*denominator = denom;