5.4-stable review patch. If anyone has any objections, please let me know.
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From: Robin Chen robin.chen@amd.com
commit c03fca619fc687338a3b6511fdbed94096abdf79 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 --- drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -131,7 +131,7 @@ static unsigned int calc_v_total_from_re
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) {