From dc28b3706b61ba1326658d96400fe55faf3dcb3e Mon Sep 17 00:00:00 2001
From: Alec Mouri <alecmouri@google.com>
Date: Thu, 18 Apr 2019 21:17:13 -0700
Subject: Support repurposing idle timer to work with kernel timer.

Idle timer would instead enable/disable hw vsyncs in accordance with
inactivity.

Bug: 130684082
Test: systrace
Change-Id: I289600fc41b7ded863c9486cf6c2ab6155b06550
---
 .../surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop    | 10 ++++++++++
 services/surfaceflinger/sysprop/api/system-current.txt         |  1 +
 2 files changed, 11 insertions(+)

(limited to 'services/surfaceflinger/sysprop')

diff --git a/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop b/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
index d3690967dc..bd8aacdff6 100644
--- a/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
+++ b/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
@@ -315,3 +315,13 @@ prop {
     access: Readonly
     prop_name: "ro.surface_flinger.protected_contents"
 }
+
+# Indicates whether Scheduler's idle timer should support a display driver timeout in the kernel.
+# The value of set_idle_timer_ms should be shorter in time than the timeout duration in the kernel.
+prop {
+    api_name: "support_kernel_idle_timer"
+    type: Boolean
+    scope: System
+    access: Readonly
+    prop_name: "ro.surface_flinger.support_kernel_idle_timer"
+}
diff --git a/services/surfaceflinger/sysprop/api/system-current.txt b/services/surfaceflinger/sysprop/api/system-current.txt
index 3c39b51f9b..dd5dbe04b3 100644
--- a/services/surfaceflinger/sysprop/api/system-current.txt
+++ b/services/surfaceflinger/sysprop/api/system-current.txt
@@ -19,6 +19,7 @@ package android.sysprop {
     method public static java.util.Optional<java.lang.Boolean> running_without_sync_framework();
     method public static java.util.Optional<java.lang.Integer> set_idle_timer_ms();
     method public static java.util.Optional<java.lang.Boolean> start_graphics_allocator_service();
+    method public static java.util.Optional<java.lang.Boolean> support_kernel_idle_timer();
     method public static java.util.Optional<java.lang.Boolean> use_color_management();
     method public static java.util.Optional<java.lang.Boolean> use_context_priority();
     method public static java.util.Optional<java.lang.Boolean> use_smart_90_for_video();
-- 
cgit v1.2.3-59-g8ed1b