[PATCH 21/49] drm/amd/display: Correct vblank_end calc for fams cmd packet

From: Nicholas Carbones <[email protected]>

[Why]
By changing how we populate vblank_nom, constraining vblank size, the
vblank_end calculation for the fams command packet gets affected. We add
up v_active with a new vblank_nom value for stream pstate's nom_vtotal,
which describes the vtotal and nominal refresh rate, and that causes
underflow.

[How]
Set nom_vtotal equal to the timing's v_total.

Reviewed-by: Dillon Varone <[email protected]>
Signed-off-by: Nicholas Carbones <[email protected]>
Signed-off-by: Fangzhi Zuo <[email protected]>
Tested-by: Dan Wheeler <[email protected]>
---
 .../display/dc/dml2_0/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c
index d5f20c85006e..8f481ef9316f 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c
@@ -1710,7 +1710,7 @@ static void build_pstate_meta_per_stream(struct dml2_pmo_instance *pmo,
 	/* common */
 	stream_pstate_meta->valid = true;
 	stream_pstate_meta->otg_vline_time_us = (double)timing->h_total / timing->pixel_clock_khz * 1000.0;
-	stream_pstate_meta->nom_vtotal = stream_descriptor->timing.vblank_nom + stream_descriptor->timing.v_active;
+	stream_pstate_meta->nom_vtotal = stream_descriptor->timing.v_total;
 	stream_pstate_meta->nom_refresh_rate_hz = timing->pixel_clock_khz * 1000.0 /
 			(stream_pstate_meta->nom_vtotal * timing->h_total);
 	stream_pstate_meta->nom_frame_time_us =
-- 
2.53.0