commit 0b5ab223e110f3a34b30e7b61e4ea68c03dba98b
author YiMing Tseng <yimingtseng@google.com> Thu Nov 11 14:05:30 2021 +0800
committer Yi-ming Tseng <yimingtseng@google.com> Thu Dec 09 09:09:25 2021 +0000
tree c87c7bb1c44219e1cdf45506113ef451ce15d998
parent dbf2545214d16eaed5901bd41c8c8e8871ef0168

Add GRALLOC_FRAMEBUFFER_NUM configuration

Add config to set the NUM_BUFFERS. Set NUM_BUFFERS to 1 can
prevent page flipping and set it to a larger number can allow
userspace to fill up the following frame earlier.

Bug: 205917753
Change-Id: Ibf4a52a1e35f4a2404008a48b637cb82c4b46365

modules/gralloc/Android.mk

diff --git a/modules/gralloc/Android.mk b/modules/gralloc/Android.mk
index 439c95d..4c4899e 100644
--- a/modules/gralloc/Android.mk
+++ b/modules/gralloc/Android.mk
@@ -38,5 +38,8 @@
 ifeq ($(TARGET_USE_PAN_DISPLAY),true)
 LOCAL_CFLAGS += -DUSE_PAN_DISPLAY=1
 endif
+ifneq ($(GRALLOC_FRAMEBUFFER_NUM),)
+LOCAL_CFLAGS += -DNUM_BUFFERS=$(GRALLOC_FRAMEBUFFER_NUM)
+endif
 
 include $(BUILD_SHARED_LIBRARY)