libqservice: Add a client interface.

Add a client interface which interfaces with hwc.
qservice upon receiving IPC, provides a callback notification to the qclient
which does appropriate stuff in hwc.

In future, qservice can safely be even made a separate process with no changes
to exisiting code. This was not true earlier owing to the hwc pointer held by
qservice forcing it to be in the same process that hwc is in.

CRs-fixed: 452977
Change-Id: I05838c213f5d4606a6573693de1bacbc5876107e
hwc: Get notified on media player death.

Add support to get notified of media player death.
This is useful in reseting secure sessions initiated by mediaserver.

Change-Id: I215b5b552a0874c86a07426cd7d16ed48f307b5d
hwc: Allow HWC to support Virtual Display

  This change allows virtual display to be composed
  by HWC for supporting Google WFD App + QCOM WFD stack.

Change-Id: If8892230256e72fa34e3fb5ae715c3ad8cbd5b64
libexternal: prefix the property name with hw

System property to be shared with the applications, they need
to have same UID.
Prefix the system property with "hw." so that it can be of system
UID and be accessed by any app.

Change-Id: Ie5db1b7e614728c53e1085089194cd8a58f9ae63
CRs-fixed: 456480
hwc: Close acquireFenceFds always.

Close acquireFenceFds always even in case of failures if a layer is either
OVERLAY or FRAMEBUFFER_TARGET to prevent leaks in case of failures.
The framework is *not* responsible for closing acquire fds, for layers
marked as above two.

Change-Id: Ia6c751d3ec25f196f5503120894fc6cc692b9d25
libhwcomposer: MDP composition for Higher Resolution panels

This patch:
       -Implements MDP composition for higher resolution
        panels of width more than 2k.
       -Adds DMA pipe support for high res. MDP composition

Change-Id: Ib7b1f822e3600eca81521294fedfe05e948b65c3
hwc: Use intermediate buffers for copybit

The earlier copybit solution involved blitting directly into
the SurfaceFlinger's framebuffer target. That solution involved
unnecessary framework changes and caused issues when the
framebuffer was being written to both by GL and copybit.
Update hwc_copybit to use our own buffers for this purpose.
We also make sure we display only the region we're interested in
so that unnecessary artifacts from previous blits do not show up
on the display. This way, we can avoid clearing the intermediate
buffers every frame.

Change-Id: I713b3fc606e0768444c621af76853ece41964da1
hwc: Enable use of copybit

 * Reenable use of copybit now that the issues are resolved.
 * Remove QCOM_BSP guards around copybit usage.
 * Add a simple dump function to hwc_copybit.
 * Fallback to MM heap when IOMMU isn't available.

Change-Id: I5ea443e7a172c54c49954038d74229882fbfc334
gralloc: Allow IOMMU memory to be uncached

The IOMMU heap can give us uncached memory, so remove this
erroneous check.

Change-Id: Ie141c55821221a1c2f75b7cf2248794d93ea6c6a
display: Add hook for triggering screen update

DSI command mode panels do not need to be refreshed on each
vsync. Due to one frame latency in CABL LUT calculation, when CABL is
enabled for DSI command mode panels, the LUT doesnt get updated for last
frame. Triggering an extra update for DSI command mode panels fixes it.

Change-Id: I7a22e338609430746dda4d3081ff199109a95035
hwc: handle blank/unblank for virtual display explicitly.

Surfaceflinger does not send Blank/unblank event to hwc for virtual
display, handle it explicitly when blank for primary is invoked, so
that any pipes unset gets committed.

Change-Id: Iec7a1611a8963408f65c8a73a1c15e47cd7faab6
CRs-Fixed: 456810
hwc: Process only MAX_NUM_LAYERS

If the incoming layer count exceeds MAX_NUM_LAYERS,
let surfaceflinger handle the list.

CRs-fixed: 456906
Change-Id: I53159104e5e714ba313d0196ca959f55c82e18ae
gralloc: Fix incorrect flag usage on old ion API

The secure flag gets sent only with the new ION API

Change-Id: Ia649500474b0c8384f4b45d599fcff54644005aa
overlay: Reset allocation on all pipes, if commit fails.

If commit fails on a pipe, overlay hal needs to reset allocation
on all pipes for the given display. As MDP Comp fails, it falls
back to video and PipeBook logic does not pick-up those pipes on
which commit was successful. Driver sets new pipes and un-stages
previously set pipes (with same z-order). Pipe clean-up happens
and then in next round, PipeBook logic picks-up previous pipes
hence userspcae and driver remain out of sync.

Change-Id: I963fbdf89f346184688c5bcac2824606a5f7a0f2
hwc: Check for correct screen state before enabling vsync

Sometimes vsync would not be disabled before the display is
blanked.
This was due to the vsync disable ioctl being kicked off in a
thread different from the event control which surfaceflinger
called. So, while the calls from surfaceflinger are in order, the
order of execution wasn't always the same. Hence, making sure
ioctls are called in the same context to ensure order.

Also
- Make blanking/unblanking logs show the operation as a string.
- Add a debug property to dump vsync timestamps (needs framework
reboot)
- Remove a log which showed delay in reading vsync. This log was
unreliable when vsync is disabled and we're still reading from
the sysfs node.

Change-Id: Ibec04e9ffebd0ac6e1d32b7031e3668abd9390ff
CRs-fixed: 443113