SF: Add ro.surface_flinger.min_acquired_buffers
This is a minimum count of buffers to indicate when computing the return
value for ISurfaceComposer.getMaxAcquiredBufferCount(). The value is
read from "ro.surface_flinger.min_acquired_buffers" if set, otherwise
the default of value of 1 is used if not.
Setting values larger than 1 affects how many buffers apps should
allocate to keep the display pipeline busy.
Bug: 239574096
Bug: 239575317
Test: Configuring "2" works.
Test: atest libsurfaceflinger_unittest
Change-Id: I4e3a441bdf94cddebb766e6bf73f7cdb82aacd0d
diff --git a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
index 682c998..fab3c0e 100644
--- a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
@@ -249,6 +249,11 @@
EXPECT_EQ(2, mFlinger.calculateMaxAcquiredBufferCount(60_Hz, 40ms));
EXPECT_EQ(1, mFlinger.calculateMaxAcquiredBufferCount(60_Hz, 10ms));
+
+ const auto savedMinAcquiredBuffers = mFlinger.mutableMinAcquiredBuffers();
+ mFlinger.mutableMinAcquiredBuffers() = 2;
+ EXPECT_EQ(2, mFlinger.calculateMaxAcquiredBufferCount(60_Hz, 10ms));
+ mFlinger.mutableMinAcquiredBuffers() = savedMinAcquiredBuffers;
}
MATCHER(Is120Hz, "") {