tree f9320eb08dc2adbec3717fd13954887c02a9f5c2
parent 56ec3f036a96143860c42fa41ed31d90df455a81
author Raj Kamal <rkamal@codeaurora.org> 1416917196 +0530
committer Raj Kamal <rkamal@codeaurora.org> 1417661432 +0530

h/q/d: Add binder-api support to change refresh-rate.

** Now, there are two ways for the clients to request
change in the refresh-rate of the target.
(a) Using metadata of the input-buffer.
(b) Using binder api added as part of this change.

** configureDynRefreshRate binder api provides three
op-modes which can be used as following:

(a) "DISABLE_METADATA_DYN_REFRESH_RATE" can be used by the
clients, to disallow display-hal from honoring refresh-rate
change requests, made by video-clients using the metadata.

For ex: This can be used during streaming use-cases
(Dash-playback, playback at WFD-sink,etc) where the idea
is not to change the refresh-rate, though video-client
requests for it using metadata, as video-clients cannot
distinguish between streaming and non-streaming usecases.

Usage:
adb shell service call display.qservice 18 i32 0 i32 0

(b) "ENABLE_METADATA_DYN_REFRESH_RATE" can be used by the
clients after DISABLE_METADATA_DYN_REFRESH_RATE, to once
again allow display-hal to be able to change refresh-rate
based on requests made by the video-clients using metadata.

For ex: This can be used by clients( Dash-playback,
WFD, etc) once they are done with their use-case.
WFD-framework will also use this when the wfd-session is
paused.

Usage:
adb shell service call display.qservice 18 i32 1 i32 0

(c) "SET_BINDER_DYN_REFRESH_RATE" can be used by the clients
to change the refresh-rate of the target using binder-api,
provided they have disallowed display from honoring the
refresh-rate requests made using metadata.

In other words, changing refresh-rate through this binder
api and using metadata approach cannot co-exist together.

Usage:
adb shell service call display.qservice 18 i32 2 i32 45
-- The refresh-rate set here will correspond to 45fps.

** Added property "persist.metadata_dynfps.disable" that
can be used by OEM's, to disable setting of refresh-rate
using the metadata.

Change-Id: I767fa174dcf1cfd061a578e96cd68af28e7dd36b