commit f2388b3c23754f33f9bba1f73c0b2ca57f00e546
Author: James Wei <jameswei@google.com>
Date: Tue Dec 18 17:39:58 2018 +0800
MTP: CPU usage high while under MTP mode.
poll timeout not setting well in MTP ffs handler.
This will cause MTP ffs handler not going into sleep mode.
Bug: 121171744
Test: MTP 500 Mbyte file copy throughput from / to Host (no drop)
Change-Id: I9b8a7257670b8e536bf2ea81118d297211254984
Change-Id: Ic79f6b04334074c73b62325b53112719ba29255d
This update splits old MTP code and new MTP code from Google
into two trees, legacy and ffs. Depending on the SDK level,
the build system will select the correct version. The reason
for separating the versions out are due to older android trees
not supporting the updated MTP code from Google.
Most MTP code is from Google, with additions needed from
implementing the Java functions in C++ for TWRP and FFS.
We assume if you are in android-9.0 or above, your kernel
has support for FFS over MTP. Verify that your init.rc
is mounting the MTP FFS driver to the proper location.
Change-Id: I4b107b239bd9bc5699527f9c8c77d9079f264a7e
