hwc: Fix unchecked return value

Check the return value of uevent_init function
and return on error.

Change-Id: I9dfca0ed84cbe5f1abf5716c5deed7808aa046ea
hwc: Add support for Secure display

- Identify secure display layer in the hwc_list
- Need to set both SECURE_OVERLAY and SECURE_DISPLAY flags for the secure
  display layer
- Disable idle timeout for secure display usecase, as GPU should not be
  accessing secure display layer

Change-Id: I555910db77c466b5e103b24b4f0ec7f47bb210a5

Conflicts:
	libhwcomposer/hwc_utils.h
hwc: use sourceCropF instead of sourceCrop from hwc_layer_t

- Always use sourceCropF instead of sourceCrop
- This was missed as part of commit 14089e

Change-Id: Ia64050a41a174f3f038c9b88d527d70c2240f2d9
libexternal: Restrict external mdp downscale to 1080p

Enable MDP downscale feature on External display upto 1080p.
If primary is 2560x1600 and hdmi is 1080p, do not perform
MDP downscale for hdmi.

Change-Id: Icf069b2d916a68c81796f4004752407e1badfd1b
gralloc: Set default value for implementation defined formats

For implementation defined formats which go via HWC, set the
default value to RGBA8888

Change-Id: I7f8c46bc47746dcf1c4a03438b8f93d7bab78bb1
Merge "libexternal: Restrict external mdp downscale to 1080p"
Merge "hwc: use sourceCropF instead of sourceCrop from hwc_layer_t"
Merge "gralloc: Set default value for implementation defined formats"
Merge "hwc: Fix unchecked return value"
hwc: handle actionsafe with downscale on ext enabled

during actionsafe calculations, if downscale on ext is enabled, we need
to consider the physical display attributes.

Change-Id: Ia07218b0b8e47b91b0bf575c66478ebaeab2e2a4
CRs-fixed: 569152
hwc: Listen fb0 event for panel status

Listen fb0 status change event for panel status. fb0 will receive
"PANEL_ALIVE=0" when panel is not responding to status call.
Call blank and unblank to reset the panel in next hwc_prepare
call.

Change-Id: I941a501a82d9f3b725660ad09631c1d8602b7325
hwc: Fix for MDP Downscaling limitation

  For HDMI/WFD downscaling scenario, if the downscale factor is
  >=2, MDP cannot do downscaling without BLT mode. Since BLT mode
  is disabled, overlay_set_failure occurs when downscale factor
  is >=2 (Ex: primary resolution 1920 x 1080, External resolution
  640 x 480). To fix this, do MDP downscaling only when downscale
  factor is < 2.

Change-Id: I6361d0290ad75abc1f39662377e590cd288a48a8

Conflicts:
	libexternal/external.cpp
Merge "hwc: handle actionsafe with downscale on ext enabled"
Merge "hwc: Listen fb0 event for panel status"
Merge "hwc: Fix for MDP Downscaling limitation"
Disable Mixed mode for External

Disable Mixed mode for external only in the case
involving alpha scaling due to limitation of VG scaling
MDP4_OP_SCALEY_PIXEL_RPT algo to upscale RGB layer

Change-Id: Ic074c712b657bf0be6ba2262b08e315e33dd76c7
Crs-Fixed: 567571
Merge "Disable Mixed mode for External"
Remove AOSP reference to utils.mk

Remove function calls from AOSP code to utils.mk
& replace them with actual definition.

Change-Id: I2ca64995e54dcc535b5f69fe448e190615b74b94
CRs-fixed: 566287
WFD video playback scenario in downscale mode.

In case of downscale usecase, correct params are
not getting set for external/virtual.
This was due to missing function call
calcExtDisplayPosition in configureLowRes
for RGB layers.

Change-Id: I47fe556d84eef15827e6e5733359654f8970e406
Crs-Fixed: 565655
Merge "Remove AOSP reference to utils.mk"