commit 2bd82aa93f5130af10c86b2588344640e7dcc6f8
author Jason Macnak <natsu@google.com> Fri Apr 17 11:46:34 2020 -0700
committer Jason Macnak <natsu@google.com> Wed May 13 08:38:21 2020 -0700
tree 17939f769f9eb8e11a3744aa79fa2121f89f16f4
parent e2a94baf658a9b3e334c824c9d6c5bfa2923bd22

Lock gralloc buffers with SW_READ/SW_WRITE usage

EmulatedCameraDeviceSessionHwlImpl::ConfigurePipeline will default
some buffers to GRALLOC_USAGE_HW_CAMERA_[READ|WRITE].

This worked with existing Cuttlefish gralloc which ignored usage
flags and just always mmap'ed with PROT_READ|PROT_WRITE.

With upgrading Cuttlefish to Gralloc4 on Minigbm, the lack of
SW_READ|SW_WRITE will result in nothing being mmap'ed and a
nullptr will be returned from lock.

Bug: b/146515640
Test: cts -m CtsCameraTestCases
Change-Id: If308dc3037bb57becb7c44f997256ad65330c682