hwc: Check vsync state before sending it up

The vsync enable ioctl is called in  a separate thread in a
recent change
Hence it was now possible that vsync could be disabled but
SurfaceFlinger still received a vsync. With this check we make
sure that doesn't happen.

Change-Id: I459c0b98ab9ce972d86a361c5ecdfe0c1a2d0e74
hwc: Fix alpha downscale check for mdp composition

Do not allow mdp composition when any layer format has alpha channel
and needs scaling as the VG pipes are not supporting alpha downscaling.

In few scenarios, at the beginning/ending of animations Surface Flinger
passes few frames with flag HWC_BLENDING_NONE though it has Alpha.
When such layer passed to VG piple and if needs scaling , it results in
flicker. Hence, just checking for HWC_BLENDING_NONE is not enough.

Change-Id: I70fdfe4547df6fe7b2771ed8042f43aa4e07a71d
CRs-fixed: 462508
libcopybit: Remove usage of C2D_NO_BILINEAR_BIT

Remove usage of C2D_NO_BILINEAR_BIT in the config mask.
This enables using the BILINEAR filter for scaling and
improves the image quality

Change-Id: Ic9b61fe3ed5b16e63971fe542928640a13d92764
CRs-fixed: 453925
hwc: Add support for clearing with c2d

When blending translucent layers or transitioning with c2d,
sometimes the frame is blended with stale framebuffer content.
Clear the frame with C2D fill surface before drawing.

CRs-fixed: 462461
Change-Id: I1dca477fe88d77f4f0fa4846b155404f348e911d

Conflicts:
	libcopybit/copybit_c2d.cpp
hwc: Handle WFD Pause/Resume usecase

During Pause event, set external pending state, there by
allowing frames to fall back to FB, closing all MDP pipes.
Resume event should be considered as a connect event.

Change-Id: I536ab9df7145bbb9081edd01168d3dcbc332f07e
CRs-Fixed: 452380
gralloc: Override gralloc calculated size only if bufferSize is greater.

bufferSize set using native window set buffer size will override gralloc
calculated size only if bufferSize is greater.
Fix for 720P, 1080P HD content playback is not working on 7x27A due to
buffer size mismatch between requested size by frameworks and allocated
size by gralloc for HAL_PIXEL_FORMAT_YCrCb_420_SP and
HAL_PIXEL_FORMAT_YCrCb_420_SP format

Change-Id: I16d04e406ab8f1f35e0e0a70e19d99a019adc5ef
CRs-Fixed: 451783
hwc/overlay: Video on 4k2k external, 4k2k rotation.

-Add support for Video via overlay on 4k2k external panel.
-Add support for rotating videos on 4k2k panels. We use
pre-rotation in hwc to rotate a video into a single buffer,
irrespective of panel size. Then this buffer is fed to MDP.
Rotator objects are managed by the new RotMgr.
-Cleaup mdpcomp and overlay.

Change-Id: Ifb08534747e8e18b6c58dd8a3e1a9947409100f1

Conflicts:
	libhwcomposer/hwc_mdpcomp.cpp
hwc: Do not set Secure flags for UI layers

Change-Id: I5116bcd93ac2a3ab034408e64aa0cd126f734692
hwc: Use correct z-order in video overlay

Set z-order of video layer to 0 and framebuffer to 1 in case
of video overlay composition so that the blending takes effect.
Also set is_fg OFF for framebuffer.

Change-Id: I05f930074d265d690f29a1003b7c28077df89bbf
CRs-fixed: 458180
libhwcomposer: add dynamic thresold support for copybit.

copybit blit may not be effective if data for composition
is high. Add configurable threshold support beyond which
we can avoid copybit blit. set default threshold value to
2 times of fb resolution.

CRs-fixed: 462450

Change-Id: I0ee77ea1d761dc370d82ade1724caefbecfa01f5
hwc: qclient: Subscribe to mediaplayer death later.

Subscribing to mediaplayer death on bootup delays
display startup because it depends on mediaplayer startup.
Defer until later.

CRs-fixed: 463863
Change-Id: I5a5fc392b88fd06f51521f9e4c06feb52a5af7c6
hwc/ov: Fix MDP orientation flags and values.

--Fix MDP_SOURCE_ROTATED_90 removal.
Since mdp flags are updated fresh each round,
this flag should not be removed if there is no 90.
If pre-rotation is used, this flag is set by hwc and removed here.
(Affects anything having a 90 component in transform)

--Provide MDP adjusted transform to prerotation calcs.
Clients on Android don't switch flips if 90 component is present,
but expect the output to be that way. (camera)
We do it in HAL and then calculate final crop for MDP.
(Affects anything using 90 + Just 1 flip i.e camera)

--Pass 0 transform to MDP even for flips, since we
prerotate if there is 90 with flips or use MDP to flip via flags,
so no need to flip transform calcs.
(Affects anything using just flips).

Change-Id: I115a82ee4558794db0b6b641710494b9007d6f54
gralloc: Stride information fix

The perform enum for the stride is defined in gralloc_priv so it
is OK to keep the case outside.

Change-Id: Id31556f76c2a2ae93a15a2e2dc4169b07360e4e6
libqservice: Change the permission for SCREEN_REFRESH

Change the SCREEN_REFRESH permission from AID_GRAPHICS to AID_SYSTEM.

Change-Id: I8d732282df481695d8241e3087725784825b756d
libexternal: disable HPD during initialization.

- Disable HPD at start, it will be enabled later
  when the display is powered on
- This fixes the issue where the HDMI mirroring
  was not working when there was a framework reboot
  or adb shell stop/start

Change-Id: I56d706ebae281297a8ec6517a4fb8e5cdda27617
CRs-fixed: 461820
hwc: Configure FbUpdate only when needed

When video overlay is on and there are no UI layers to compose,
there is no need to configure for framebuffer target.

If framebuffer target is  also configured in such cases, video is not
shown on display due to 0 z-order.

Change-Id: I468068fa3a273d61e3688014251043035353cec0
libcopybit: Use blending parameters passed by HWC

Instead of assuming the premultiplied alpha based on the color
format, use the blending parameter passed by the HWC.

Change-Id: Ib494644b6f9c4bf13d8ea28327ccc2058a52aae8
CRs-fixed: 466732
hwc: Configure pipe for FB even if we exceed max layers

Even if we exceed max supported layers, configure pipe for FB
Because FB contents are always displayed using hwc

Also some minor code fixes

Change-Id: I740ab7e908c916373b1d87facd831e09098ce753

Conflicts:
	libhwcomposer/hwc.cpp
Tiny changes to support media codecs with vanilla driver.

Change-Id: I5415b6af1b13c4d9e95dfe4199325274b1d0f3eb
hwc: fix dst calculations for right mixer

The calculations made for the right mixer was not correct,
fixed it for both FBUpdate and video usecases

Change-Id: Iff2c296321bce14b776731528fff6f1d255d829a