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drm/amd/display: Get ceiling for v_total calc 

Updating certain variable blanking calculations to use ceiling function.

Reviewed-by: Chris Park <chris.park@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Acked-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Signed-off-by: Bing Guo <Bing.Guo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Guo, Bing 2021-10-04 13:13:57 -04:00 committed by Alex Deucher
parent bc39a69a2a
commit 33df94e181
1 changed files with 12 additions and 3 deletions
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15
drivers/gpu/drm/amd/display/modules/freesync/freesync.c
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@ -155,9 +155,18 @@ static unsigned int calc_v_total_from_duration(
if (duration_in_us > vrr->max_duration_in_us)
duration_in_us = vrr->max_duration_in_us;
v_total = div64_u64(div64_u64(((unsigned long long)(
duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
stream->timing.h_total), 1000);
if (dc_is_hdmi_signal(stream->signal)) {
uint32_t h_total_up_scaled;
h_total_up_scaled = stream->timing.h_total * 10000;
v_total = div_u64((unsigned long long)duration_in_us
* stream->timing.pix_clk_100hz + (h_total_up_scaled - 1),
h_total_up_scaled);
} else {
v_total = div64_u64(div64_u64(((unsigned long long)(
duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
stream->timing.h_total), 1000);
}
/* v_total cannot be less than nominal */
if (v_total < stream->timing.v_total) {