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drm/amd/display: Fix 64-bit division, yet again

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Also make the code somewhat more readable.

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland 2017-02-14 14:51:06 -05:00 • committed by Alex Deucher
parent e166ad43d5
commit 4a9054dda6
1 changed files with 11 additions and 4 deletions
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15
drivers/gpu/drm/amd/display/modules/freesync/freesync.c
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@ -210,6 +210,8 @@ bool mod_freesync_add_stream(struct mod_freesync *mod_freesync,
struct core_freesync *core_freesync = NULL;
int persistent_freesync_enable = 0;
struct persistent_data_flag flag;
unsigned int nom_refresh_rate_micro_hz;
unsigned long long temp;
if (mod_freesync == NULL)
return false;
@ -262,11 +264,16 @@ bool mod_freesync_add_stream(struct mod_freesync *mod_freesync,
enable_for_video = false;
}
unsigned int nom_refresh_rate_micro_hz = (unsigned int)
(((unsigned long long) core_stream->public.timing.pix_clk_khz) * 1000ULL * 1000ULL * 1000ULL
/ core_stream->public.timing.h_total / core_stream->public.timing.v_total);
temp = core_stream->public.timing.pix_clk_khz;
temp *= 1000ULL * 1000ULL * 1000ULL;
temp = div_u64(temp, core_stream->public.timing.h_total);
temp = div_u64(temp, core_stream->public.timing.v_total);
if (caps->supported && nom_refresh_rate_micro_hz >= caps->min_refresh_in_micro_hz && nom_refresh_rate_micro_hz <= caps->max_refresh_in_micro_hz)
nom_refresh_rate_micro_hz = (unsigned int) temp;
if (caps->supported &&
nom_refresh_rate_micro_hz >= caps->min_refresh_in_micro_hz &&
nom_refresh_rate_micro_hz <= caps->max_refresh_in_micro_hz)
core_stream->public.ignore_msa_timing_param = 1;
core_freesync->num_entities++;