[PATCH 3/5] drm/i915/dp: Set FAVT mode in DP SDP with fixed refresh rate

[Ankit Nautiyal]

While running with fixed refresh rate and VRR timing generator set FAVT
mode (Fixed Vtotal) in DP Adaptive Sync SDP to intimate the panel
about Fixed refresh rate.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index f33b2da1b084..8b362b20bc8d 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2634,10 +2634,12 @@ static void intel_dp_compute_as_sdp(struct intel_dp *intel_dp,
 
 	crtc_state->infoframes.enable |= intel_hdmi_infoframe_enable(DP_SDP_ADAPTIVE_SYNC);
 
-	/* Currently only DP_AS_SDP_AVT_DYNAMIC_VTOTAL mode supported */
 	as_sdp->sdp_type = DP_SDP_ADAPTIVE_SYNC;
 	as_sdp->length = 0x9;
-	as_sdp->mode = DP_AS_SDP_AVT_DYNAMIC_VTOTAL;
+	if (crtc_state->vrr.fixed_rr)
+		as_sdp->mode = DP_AS_SDP_AVT_FIXED_VTOTAL;
+	else
+		as_sdp->mode = DP_AS_SDP_AVT_DYNAMIC_VTOTAL;
 	as_sdp->vtotal = adjusted_mode->vtotal;
 	as_sdp->target_rr = 0;
 	as_sdp->duration_incr_ms = 0;
-- 
2.40.1