msm: display: plane alpha support

Clean up the blending rule to follow blend_op set from hwc.
Use modulate alpha for plane alpha when it is not 0xff.
Keep backward compatibility if blend_op is not set.

Change-Id: I02fd3c3c7b5ace2e6eec22b2db0284161404a0fc
Signed-off-by: Ken Zhang <kenz@codeaurora.org>

Conflicts:
	drivers/video/msm/mdp4_overlay.c
msm_fb: Enable mdp clock during LVDS init.

Currently on 8064 CDP, MDP clock is off when configuring LVDS
PHY registers during boot up. This is causing display not to
come up. Enable MDP clock during the PHY configuration during
LVDS on and off.

CRs-fixed: 455620
Change-Id: Ie2b607591e936e9ab63d50cd0e2c8ba981aae6a2
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
msm_fb: display: add setting gpio-controlled backlight logic

For the panels which backlight is controlled by gpio, add this logic
in driver to turn on/off backlight, instead of calling board panel
on/off functions, to avoid garbage display due to early backlight
turn-on.

(cherry picked from commit 3eebb2e33570e32d11a757e493e12a8e79e08d6f)

CRs-fixed: 408728
Change-Id: I6f1b9bd78d96dbf1492e854edd59b05f8dec205f
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>
msm_fb: display: adjust refx100 parameter to avoid tearing

refx100 is used to calculate how many mdp_vsync clocks to complete one
line in the panel. This info is used by mdp h/w to sync data transfer
between mdp h/w and command mode panel to avoid tearing.

CRs-fixed: 379223
Change-Id: I3880a350b77cb8165745ea343b1525e84100a62d
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>
Revert "msm_fb: display: blt always enabled for 720p,1080p, secure buf"

This reverts commit ed3b07946fedf0b8736f737a2f14b1c2f6ef8b8e.

Change-Id: I34d5df0cc2bc744944f4c324a8f1e588c32a5478
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>

Conflicts:
	drivers/video/msm/mdp4_overlay.c
msm_fb: display: disable mdp blt mode

The switch of blt mode may cause mdp hang on some targets. To avoid
blt switch, we won't allocate the pipe that requires blt
mode. Basically this implies two things: downscaling is done by
rotator and gpu composition is used in case of blt mode is needed.

This implementation is to calculate mdp clk requirement based on the
req data passed from userspace before setting the actural pipe
data. If overlay_set asks for mdp clk that is greater than
mdp_max_clk, meaning blt is needed, overlay_set returns before pipe
allocation or pipe data change, so this way can avoid mdp to work on
wrong pipe data.

Change-Id: I22e73d08bed920b366c18ee21b132339cf2a0347
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>

Conflicts:
	drivers/video/msm/mdp4_overlay.c

Conflicts:
	drivers/video/msm/mdp4_overlay.c
msm_fb: Add support for NT35590 720p panel

Add support for Truly NT35590 panel on 8930 EVT.

Change-Id: I415c264d9ad450293e7d7965a72095333e75d443
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>

Conflicts:
	arch/arm/mach-msm/board-8930-display.c
msm_fb: hdmi: Proper disabling of HDMI

This change allows customers to disable the HDMI in the build
itself. This can be achieved using kernelconfig macros. It fixes
issues where some of the functions got undefined after removing
the HDMI from kernelconfig. Also, fixes issues related to resume
where it was getting stuck in an empty list infinite iteration.

CRs-Fixed: 458871
Change-Id: Id87dc970aa82a6c1cc7756f94f4c61a8ce1c22d0
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>

Conflicts:
	arch/arm/mach-msm/board-8930-display.c
	arch/arm/mach-msm/board-8960-display.c
	arch/arm/mach-msm/clock-8960.c
	drivers/video/msm/mdp4.h
msm: kgsl: Prevent fault tolerance memory free twice

There is a possibility of fault tolerance data to be freed twice
if fault tolerance fails. Do not free the data when the data allocation
fails, take the decision to free the data only at the end of
fault tolerance.

CRs-Fixed: 469807
Change-Id: Ifcc9a75e70440be6471b32d8413f4faa01a9ee47
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>

Conflicts:
	drivers/gpu/msm/adreno.c
msm: kgsl: Submit a draw command on resume

For A305, submit an extra draw command while resuming the GPU from
SLUMBER state. This fixes corruption seen when the screen is
turned on.

Change-Id: Iafed90b617b0a700ac3f2afcb6d9ecadca590914
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>
msm: kgsl: Add barriers to GPU fault tolerance memory reads

In GPU fault tolerance When reading from memstore add
memory barriers. This ensures memstore reads are
completed and makes GPU fault tolerance code robust.

CRs-Fixed: 469807
Change-Id: Iefb950ae2647eb8ae16bfb9a8d7ee9885636d920
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>
msm: kgsl: Fault tolernace for context with pagefault

If pagefault happened in same global timestamp
as the hang do not attempt replay for fault tolerance.
This is an improvement from previous policy of not
attempting fault tolerance for the context
with pagefault.

CRs-Fixed: 469807
Change-Id: Idc9512b9fab3c9a2bf0b33a7e06f3070075427ba
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>

Conflicts:
	drivers/gpu/msm/adreno.c
msm: kgsl: a2xx: Check the right interrupt status bits

Check the actual interrupt status bits in a2xx_irq_pending instead
of reading the mask registers which were always set and returning
true. Troutslap for the original author (me).

CRs-fixed: 467381
Change-Id: Ic0dedbada1c5fa64548221718c1eaf9b6eaaa1e8
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
msm: kgsl: Add CP_WAIT_FOR_IDLE packet before updating timestamp

HW workaround to resolve MMU pagefault caused by memory
freeing early before GPU completes it.

This is race condition where timestamp is getting updated
and the event handler runs before the GPU actually got done
with the timestamp, hence freeing the buffer early while GPU
still not completed with it.

CRs-Fixed: 469194
Signed-off-by: Anshuman Dani <adani@codeaurora.org>

Conflicts:

	drivers/gpu/msm/adreno_ringbuffer.c

Change-Id: I6d338d7dca680f57f2c39ed5a14381b261bf8bce
Signed-off-by: Anshuman Dani <adani@codeaurora.org>
msm: kgsl: Allocate space in ringbuffer for EOF commands

When userspace passes end of frame (EOF) flag, ringbuffer is
inserted with EOF marker commands. Allocate ringbuffer space
for EOF marker commands.

CRs-Fixed: 469807
Change-Id: I7de8d1b81d358a8d8753ac84fbdceddad27bb17d
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>
msm: kgsl: Don't consider active count if not in active state

Don't consider active_cnt variable if not already in ACTIVE state.
The active count variable does not necessarily exactly indicate the
number of open handles to GPU for switching power state. Hence,
only wait for active count to reach zero before switching to SUSPEND
state if, the current state is ACTIVE.

CRs-fixed: 483154
Change-Id: Ie025a1873cfb9237bdfba89204f4c2116549eba4
Signed-off-by: Harsh Vardhan Dwivedi <hdwivedi@codeaurora.org>
msm: kgsl: Protect the mem_entry list during deletion

Use the spinlock to prevent corruption of the mem_entry list during
deletion. Otherwise the mem_entry list may be modified by another
thread at the same time resulting in memory corruption.

Change-Id: I5728a8b925753d5fda82413615e5ebaf0366dfd8
CRs-fixed: 489224
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>
msm: kgsl: Don't access context memory after it's freed

Context memory was potentially accessed after being freed. Fix this
by incrementing the context's refcount at strategic places.

Change-Id: I31049bdd3eb9ac52160ca593619fcc8a32d4ddee
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>
msm: kgsl: Delete the context event while the context is still valid

Make sure that the context is freed only after the event is deleted
from the list to avoid accessing invalid list pointers. This makes
sure that the context memory is not accessed after being freed.

Change-Id: I9196219f1472396c0063dbeaa5351f66e6e5648f
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>
Signed-off-by: Uma Maheshwari Bhiram <ubhira@codeaurora.org>
msm: kgsl: Add NULL check for next_event hook

KGSL driver needs to check that the function pointer
is not NULL before calling the hook. next_event
is an optional function not implemented by the 2d
core. This fix ensures that optional and unimplemented
function will not invoked by the driver.

Change-Id: I687b028260e3ec304d973c6a5bded0a8fdbfb73b
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>