[PATCH v11 14/18] drm/i915/display: Wait for VRR PUSH status update

[Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>]

After VRR Push is sent, need to wait till flipline decision boundary
to get Push bit to get cleared.

--v2:
- Adjust delays to vrr vmin vblank delays. (Ankit)

--v3:
- Change intel_vrr_vmin_safe_window_end() so that
intel_dsb_wait_for_delayed_vblank() uses correct delay. (Ankit)

--v4:
- Simplify intel_vrr_vmin_safe_window_end implementation. (Ankit)

Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_vrr.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 68b39fe0f7bc..a4a198a28519 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -1095,10 +1095,21 @@ int intel_vrr_safe_window_start(const struct intel_crtc_state *crtc_state)
 		return crtc_state->hw.adjusted_mode.crtc_vdisplay;
 }
 
+static int
+intel_vrr_dcb_vmin_vblank_start(const struct intel_crtc_state *crtc_state)
+{
+	return (intel_vrr_dcb_vmin_vblank_start_next(crtc_state) < 0) ?
+		intel_vrr_dcb_vmin_vblank_start_final(crtc_state) :
+		intel_vrr_dcb_vmin_vblank_start_next(crtc_state);
+}
+
 int intel_vrr_vmin_safe_window_end(const struct intel_crtc_state *crtc_state)
 {
-	return intel_vrr_vmin_vblank_start(crtc_state) -
-	       crtc_state->set_context_latency;
+	int vmin_vblank_start = crtc_state->vrr.dc_balance.enable ?
+			intel_vrr_dcb_vmin_vblank_start(crtc_state) :
+			intel_vrr_vmin_vblank_start(crtc_state);
+
+	return vmin_vblank_start - crtc_state->set_context_latency;
 }
 
 int intel_vrr_dcb_vmin_vblank_start_next(const struct intel_crtc_state *crtc_state)
-- 
2.48.1