tag 6ae1f783e6e20bd346aa5236a35b26669ccdf232
tagger The Android Open Source Project <initial-contribution@android.com> Mon Jan 07 11:13:53 2019 -0800
object feda861bb4a8d792ddbd2bd00917b4f324db87c2

Android 9.0.0 Release 30 (PQ1A.190105.004)

commit feda861bb4a8d792ddbd2bd00917b4f324db87c2
author Victor Tasayco Loarte <victorx.tasayco.loarte@intel.com> Mon Dec 04 02:45:06 2017 -0800
committer Andriy Naborskyy <andriyn@google.com> Wed Feb 07 10:45:25 2018 -0800
tree 8bf9daaab702c2c8703f2f172ea418fe7e46df3d
parent 59fd80804d6dfa8d1e99b69f8e43fb071cad3a5a

hwc: fix display issue when no buffer handle update

Cherry-pick from CL 3577634 on partner gerrit

When there's no buffer handle update for a given plan, current HWC implementation
will assume no content update and will not commit/flip the new content to display.
When the layer stack is changing (new layer added/removed...This's advertised by
SF through GEOMETRY_CHANGED flag), this assumption is no longer valid.

This patch will reset the current data buffer attached to the given plan when it's
being reclaimed. This should happen when rebuilding the new layer stack to be composed,
by the time we deinit the current layer list.
This way we can prevent black screen issue that may occur when a new activity's layer
keeps using the same buffer handle attached to the previous layer.

Change-Id: I4c24c963466db478633121dadcb6434208fc1b4a
Tracked-On: https://jira01.devtools.intel.com/browse/AW-7570
Signed-off-by: Zaghdoud Walidx <walidx.zaghdoud@intel.com>