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drm/amd/display: Round calculated vtotal

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commit c03fca619f upstream.

[WHY]
The calculated vtotal may has 1 line deviation. To get precisely
vtotal number, round the vtotal result.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Anthony Koo <anthony.koo@amd.com>
Signed-off-by: Robin Chen <robin.chen@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Robin Chen 2024-08-23 15:00:28 +08:00 committed by Greg Kroah-Hartman
parent 55fcbe5f60
commit 9ce1ee22dc
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/modules/freesync/freesync.c
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@ -133,7 +133,7 @@ unsigned int mod_freesync_calc_v_total_from_refresh(
v_total = div64_u64(div64_u64(((unsigned long long)(
frame_duration_in_ns) * (stream->timing.pix_clk_100hz / 10)),
stream->timing.h_total), 1000000);
stream->timing.h_total) + 500000, 1000000);
/* v_total cannot be less than nominal */
if (v_total < stream->timing.v_total) {