msm_fb: display: silent blending error warning message

If there had no any pipe blending stage changes, then do not
call belnding set up to avoid unnecessary warning messges.

CRs-fixed: 467556
Change-Id: I07520b3b0917375c41405e736dcb9eb8a3daddc1
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
msm_fb: display: exit properly when rotator max session reached

When rotator session reach maximum, it should exit without calling
put_img since no get_img had been called.

CRs-fixed: 466462
Change-Id: I951570227ebd81da6dad19c1b897cde84f8d0451
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
msm_fb: Fix adb shell start/stop issue when bypass enabled

Currently when 2/3/4 layer bypass is enabled, doing a adb shell
stop/start is failing overlay and composition happens through
GPU. Fix this issue by proper overlay configuration during this
scenario.

Change-Id: Ia04f1839bf80ed552671e48445af63a4dcd6bdfd
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
Disable ak8975 driver in iio
msm: kgsl: Resolve a potential race in the interrupt handler

In the GPU interrupt handler we attempt to clear the ts_cmp_enable
for the active context so that future interrupts are skipped until
someone needs one again. If for some reason the interrupt handler
is delayed then there is a possiblity that the "current" context in
the GPU isn't the one that fired the interrupt. In that case we
could be accidently clearing a ts_cmp_enable for a context that
needs it. Instead of clearing in the interrupt handler clear it
from the GPU so we can be sure we got the right context.

As a bonus pushing this logic to the GPU side lets us get rid of
some extra register reads/writes in the interrupt handlers.

Change-Id: I3cb3d1a3c626d0594e55bff4535990c1402764fa
Signed-off-by: Harsh Vardhan Dwivedi <hdwivedi@codeaurora.org>
msm: kgsl: Check the current interrupt status before power operations

Sometimes the core will go idle before the interrupt can be handled on
the GPU. If that happens then we could go to a lower power state before
cleaning up the pending interrupt and various entities that might be
waiting for it. Consider the current interrupt status when checking
for idle.

Change-Id: Idd43e56e0162a522e0929df83531aff94beadc19
Signed-off-by: Harsh Vardhan Dwivedi <hdwivedi@codeaurora.org>
Update defconfigs