msm: mdss: Lock post processing register writes

Ensure that post processing changes are committed and flushed independently
of other pipe commits. Workaround for hardware bug in MDSS flush
functionality.

Change-Id: I8cc2f044242c978159074040b766db8dca3a42a5
Signed-off-by: Carl Vanderlip <carlv@codeaurora.org>
Signed-off-by: Adrian Salido-Moreno <adrianm@codeaurora.org>
3 files changed