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drm/amd/display: Add capability check for static ramp calc

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[Why]
Static ramp to max refresh rate does not have capability check on
calculated v_total. Programming a lower v_total_min and max than the
total causes continuous spurious HPDs.

[How]
Add a capability check after v_total calculation similar to calculate
v_total helper functions.

Signed-off-by: Jaehyun Chung <jaehyun.chung@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jaehyun Chung 2019-09-23 10:00:57 -04:00 committed by Alex Deucher
parent fc067805ac
commit 8396745da8
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/display/modules/freesync/freesync.c
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@ -234,6 +234,10 @@ static void update_v_total_for_static_ramp(
current_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)
v_total = stream->timing.v_total;
in_out_vrr->adjust.v_total_min = v_total;
in_out_vrr->adjust.v_total_max = v_total;
}