[PATCH 4/5] drm/i915/vrr: Avoid sending PUSH when VRR TG is used with Fixed refresh rate

[Ankit Nautiyal]

As per Bspec:68925: Push enable must be set if not configuring for a
fixed refresh rate (i.e Vmin == Flipline == Vmax is not true).

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_vrr.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 1a9e10fb396d..406838df2d7a 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -234,7 +234,7 @@ void intel_vrr_send_push(const struct intel_crtc_state *crtc_state)
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 
-	if (!crtc_state->vrr.enable)
+	if (!crtc_state->vrr.enable || crtc_state->vrr.fixed_rr)
 		return;
 
 	intel_de_write(dev_priv, TRANS_PUSH(dev_priv, cpu_transcoder),
@@ -247,7 +247,7 @@ bool intel_vrr_is_push_sent(const struct intel_crtc_state *crtc_state)
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 
-	if (!crtc_state->vrr.enable)
+	if (!crtc_state->vrr.enable || crtc_state->vrr.fixed_rr)
 		return false;
 
 	return intel_de_read(dev_priv, TRANS_PUSH(dev_priv, cpu_transcoder)) & TRANS_PUSH_SEND;
@@ -261,8 +261,9 @@ void intel_vrr_enable(const struct intel_crtc_state *crtc_state)
 	if (!crtc_state->vrr.enable)
 		return;
 
-	intel_de_write(dev_priv, TRANS_PUSH(dev_priv, cpu_transcoder),
-		       TRANS_PUSH_EN);
+	if (!crtc_state->vrr.fixed_rr)
+		intel_de_write(dev_priv, TRANS_PUSH(dev_priv, cpu_transcoder),
+			       TRANS_PUSH_EN);
 
 	if (HAS_AS_SDP(dev_priv))
 		intel_de_write(dev_priv,
-- 
2.40.1