[PATCH 5/9] 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.nauti...@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 6736e8a44faa..a771706d80df 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -317,7 +317,7 @@ 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),
@@ -330,7 +330,7 @@ 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;
@@ -344,8 +344,9 @@ 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