From 52bcc2dcc143d4523037839ab7c315827c6cbd7f Mon Sep 17 00:00:00 2001
From: Midas Chien <midaschieh@google.com>
Date: Tue, 28 Apr 2020 13:25:30 +0800
Subject: [PATCH] redfin: add display fps deferral

The FPS deferral property allows deferring clock/bandwidth votes
when switching from high refresh rate to low in case hardware
takes some extra time to change refresh rate.

Bug: 152468927
Bug: 154607334
Test: 60/90 switching, no noise line
Test: systrace to check vsync period
Change-Id: I47284578d13c203b14b3213081faf258dd9a542b
---
 device-redfin.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/device-redfin.mk b/device-redfin.mk
index 9362f99..a9b6a5f 100644
--- a/device-redfin.mk
+++ b/device-redfin.mk
@@ -177,5 +177,8 @@ PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.set_touch_timer_ms=200
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.set_display_power_timer_ms=1000
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.use_content_detection_for_refresh_rate=true
 
+PRODUCT_PROPERTY_OVERRIDES += \
+    vendor.display.defer_fps_frame_count=2
+
 # Keyboard height ratio
 PRODUCT_PRODUCT_PROPERTIES += ro.com.google.ime.height_ratio=1.2