msm_fb: display: add scaling factor for mdp ab

system profiling found that mdp downscaling needs larger bandwidth
that is related to mdp ab request, so adding scaling factor to mdp ab
calculation reduces the chance of underruns.

ab - scaling factors - port0 and port1 split
ib - 1.5 x ab - no split and same on both ports
dlx: Update bw values once more.

I think we finally have it nailed down.
msm_fb: display: Add pseudo-planar 422 H1V2 support in the MDP4

Rotator outputs pseudo-planar 422 H1V2 for interleaved inputs
on 90 degree rotation. Add changes to support MDP_Y_CRCB_H1V2
in MDP4.

Change-Id: I6311035b78cd9b7a74953bb063cc26c1799b8fa8
kgsl_pwrscale: Rework policy sysfs implementation

In the current implementation, the pwrscale policy kobj is
created when the pwrscale driver initializes.  It is then added
to the kobj hierarchy when a governor adds sysfs files.

When a governor removes sysfs files, it frees the kobj.

Then, when a new governor starts up, it attempts to add an
uninitialized kobj.  This fails.

Instead, use a constant kobj for the policy directory,
and add governor-specific attributes under it.  If a
sysfs group is given a name, all attributes in the group
will appear in a subdirectory with that name (see cpufreq
governor tuning variables).  Use this approach for our
governor tuning.

TODO (possibly in a future patch) - Rework this so the
governor attributes can be groups attached directly to
the pwrscale kobj.

Change-Id: I7b8ae6d5e690ee107be037ccaf2e737e52062feb
msm_fb: display: add an extra write of 0 to clear dsi-ack-err bit

In addition to writing 1 to clear dsi-ack-err bit, an extra write of 0
is also need to clear error bit completely.

CRs-fixed: 478443
Change-Id: Id4c3e2a5a29534d65601999d3bbf9f30ebc73896
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
msm_fb: Remove the extra freelist in display_commit

There is an extra freelist call to unmap IOMMU source buffers
in display_commit for LCDC interface. This is causing IOMMU
page faults during boot up on targets with LCDC interfaces.
Remove this extra freelist call.

Change-Id: I12a905efc82c5b9751acbc5941a66d0b58027509
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
msm_fb: display: Do a pre-fill to writeback buffers.

When switching mdp operating mode to blt, writeback buffers need
pre-fill. Move the pre-fill code from isr routine to do_blt, where
actual switch to blt mode happens.

CRs-fixed: 471098
Change-Id: I0f845397894c749ac518a1fa605f84cd5fc2ad15
Signed-off-by: Mayank Chopra <makchopra@codeaurora.org>
msm_fb: display: fix the hang issue caused by solidfill pipe

When mdp pipe solidfill mode is disabled, the staled pipe info is used
to update mdp pipe regs. This caused mdp hang. Since
mdp4_overlay_rgb_setup function already resets solidfill mode, this
patch removes any pipe register updates that are related to disabling
solidfill mode.

CRs-fixed: 467555
Change-Id: I23f4b29731c9097ab0cc38baa00cd35bc536d2ba
Signed-off-by: Huaibin Yang <huaibiny@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>
msm_fb: display: add mfd null pointer and mfd panel_power_on checks

These checks are necessary for the situations where display is off but
vsync ctrl enable or disable is still called.

CRs-Fixed: 462586
Change-Id: I2ee43ff323da38359f3bff28669df19b87d8343d
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>