hwc\overlay: Remove support for foreground override

Remove support for overriding a layer's z to set it up for foreground.
This is unused and can be achieved using pipes staged at required
z-orders.

Change-Id: Ia4688beed770c44c20d201a2dc5687252e002981
overlay: Add support for rotator downscale

Add support for rotator downscale. This is enabled from 8994 onwards
Constraints:
--Downscale should be a power of 2, max upto 32
--Both directions should have equal downscale
--{src_w, src_h} mod downscale = 0
--No BWC
--No Interlaced video support

The rotator's destination rect is modified to reflect the presence of
downscale. Any downscale calcs should be done only after adjusting
crop to meet rotator's requirements.

Smaller downscale is used if we need to chop off any more than 1
line or pixel.

Change-Id: Id07d62fefa3213035f16cca49497800716484a95
hwc/overlay: Implement rotator caching

* A non-updating layer requiring rotation, can make use of
the older rotator buffer written when the layer got first
updated, rather than invoking a new rotator cycle.

* A rotator play is avoided in cases where incoming layer
buffer fd, offset, whf, src-rect, dst-rect, etc are similar
to that of the previous input layer to the rotator.

* For ex: In a usecase where video layer updates happen at
30fps and all other asynchrous UI updates happen at 60fps,
instead of the traditional 60 calls of rotator play per sec,
we now do only 30 thereby saving rotator bandwidth.

* Property "debug.rotcache.disable" can be used to disable
this feature.

Change-Id: I1d1c352c63007b7e0b4fee40882086ccd2f5a4aa
gralloc: fix getYUVPlaneInfo for YV12 format

- Use proper alignment for cstride while calculating the
  ycbcr info for YV12 format
- This fixes the corruption issue when the video is composed
  using GPU

CRs-fixed: 711696
Change-Id: I776cc6c5ce781ea3de25b5d8427345b512a8305a
gralloc: Use ION fd in FB handle

- After mmap, use the meta data ioctl to get the ION fd
  for the framebuffer memory as GPU expects buffers to
  from ION
- Set appropriate flags for the framebuffer private handle
- Remove unused members

Change-Id: I45c4917d9811cd3b3800adf222b92f41f97430c0
Limit #ROT-SESSIONS to 4 in LayerRotMap and RotMgr

* Limit the number of rotator sessions to 4 both in
LayerRotMap and RotMgr structures

* Make use of MDPVersion getter fuctions to check
for maxMixerWidth and maxDownScale supported by MDP

Change-Id: I27dac877807fbb4ed6fcb3500a3a318a2ef5d8b2
qdutils: Parse rotator downscale feature

Parse rotator downscale feature from the capabilities sysfs node

Change-Id: I346a20d4879682e115eb2f8f74afd41dca31e930
qdutils : Read max mixer width from drivers.

Read the maximum width mixer can output from drivers
and consider this in identifying if dual pipes are required
to support a layer. So far above 2K dimensions we are using dual
pipes, but 8x39 mixer output can be upto 2560. So there is no
need of dual pipes as long as pipe data is less than this limit.
Compare layer/panel resolutions against this limit to deduce
if there is a need for dual pipes or split.

Change-Id: I52e1d28e381327d4f0b00f5ea8547c1e6157313c
hwc: Fix compiler warning

Fix compiler warning messages due to narrowed conversions.

Change-Id: Ifa770683fa9af7d5280c9117520276e04100302c
gralloc: Fix incorrect handle validation check

The YUV plane info reported to driver has an incorrect handle
check. Use the check correctly.

Change-Id: Ice6388a3d8b91bfa5373e850e3102c6ccf92eb75
display: Remove ashmem header includes

Ashmem use in gralloc has been deprecated for some time. Remove
the stale headers.

Change-Id: Ie048c377b649c0639ffeefe9af41f7a5caaf0382
libqdutils: Readd macro for compatibility

Change-Id: I4f0d684e3e2272f7a70ede3cde9b9020173da058
hwc: Handle validateAndSet failures in AD prepare call

When validateAndSet fails we must reset the mDoable flag to false and
close the fb device. This will prevent making a draw call using
invalid resource references and prevent any fd leaks.

Additionally, we should only turn AD on if there are no configuration
errors during prepare call. This will prevent toggling AD between
on/off state in the face of continuous failures.

Change-Id: I15502dbf64c6203092aa13e001bab5d27b0e17ec
hwc: Conditionally compile dirtyRect under QCOM_BSP for copybit

Conditionally compile layer's dirtyRect under QCOM_BSP in the copybit
file to prevent breaking builds that don't have this member in
headers.

Change-Id: I1669c5eefd1f48e45625797ef1508b5a6f23e6b1
hwc : Add support for single layer Bypass in MDP3

If the display list contains single layer and that layer
has same properties as Frame Buffer, avoid BLIT on Frame buffer
and pass it directly to display.

Change-Id: I24decaca4788432a55b550caa2a1354a670cd6fa
hwc : Add support for ABC in MDP3

In display list if one layer has same parameters
as framebuffer on index '0'. Use this layer
as FB and blit other layer(s) on top of it.

Change-Id: If38712781f24a2e27686d2b370643f51a9b05358
hwc : Enable ABC only for non intersecting layers.

To prevent artifact(s), we should enable ABC only in case
of non intersecting layers.

Change-Id: I3dd265e834340dcb298d7b9e06d135a4583a17b8
hwc: Remove external only feature related code

External only feature is completely handled in surfaceflinger, remove
unwanted code churn related to external only feature from display HAL.

Change-Id: If4f4f3fa8e91a5b8387e426b9e190abd2b06d793
overlay : Rely on 8x16 pipe strategy for 8x39.

Since both has same number of pipes with similar
features like scaling capabilities, for now rely on 8x16.

Change-Id: Ief51bb5c70d8aef7dca3d791f8b4d62a4c5392ff
hwc: Simulate composition strategy

Provide support to simulate composition strategy tree to execute
and test multiple strategy combinations across test cases.

Change-Id: I5011fad32f8f45ecef47b6df513f9d72343697d2