msm_fb: display: extend mutex protection for mdp pan display

When mdp commits a buffer to play, functions inside pan display, e.g.
mdp4_overlay_mdp_perf_upd are based on the current state of play, so
extending mutex to the scope of pan display to avoid race conditions.

Change-Id: I2e55567fd21de3738be066a2dee298d8122f12a3
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>
msm_fb: display: Make sysfs read request interruptible

Change blocking sysfs read request to be interruptible and protect
vsync timestamp value to prevent corruption.

Change-Id: I510d84134b0ab70d17729e8c53c91fa926035142
Signed-off-by: Mayank Chopra <makchopra@codeaurora.org>
msm_fb: display: add dtv base layer swap

Add dtv base layer swap between border fill pipe
and rgb pipe to support hdmi as primary display.

Change-Id: I127a301385d5d83e5d06507869132c6e124cc94f
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
msm_fb: display: return fail if pipe still staged

Pipe is not un-staged from mixer when it is unset.
It expects a pan_display() to un-stage it out of mixer.
Return fail at overlay_set() if pipe was still stage
at mixer.

CRs-fixed: 399193, 393979
Change-Id: I562f6e133bb239b30f4f53669dbf1cc5ddf80d02
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
msm_fb: display: check pipes queued before enter wait_for_completion

Timing generator will not be turned on if there are no pipes queued.
Therefore wait_for_completion may never be completed if there have
no pipes queued.

Change-Id: Iafba086e4ba20b31470c9fd385c4f5c474ecadcf
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
msm_fb: display: Enable scaling bit while setting x-flip bit

To enable left-right flip x-scaling bit should be set for
MDP 4.2 and above versions. This fixes the issue when RGB layer
pipes are not properly rotated.

Change-Id: I0afae4aecde39ce3ac4dcbefc0bda93510e7d18a
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
Revert "msm_fb: display: add fput_light to frame buffer"

This reverts commit a84a41a0d5f6b98b8dd53545b74541a76ca18d95.

Change-Id: I0b8ebc8ed122d99e8731ac79b046dae18edfb48b
Signed-off-by: Dhivya Subramanian <dthiru@codeaurora.org>
msm_fb: display: add fput_light to frame buffer

Frame buffer's (fb0) ref_count need to be balanced. overlay_play()
increase fb0's ref_count (fget_light). This patch will decrease fb0's
ref_count by calling fput_light after commit

(cherry picked from commit 7d136bef71281855cd224ccc967e4e95286f5356)

Change-Id: I9ba6d5c73cdb29c32a665d2b7b90df996c5b39e6
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
msm_fb: dsiplay: fix frame buffer f_count leak

Frame buffer maintains a reference count (f_count) which increased
by fget() and decreased by fput(). overlay play will apply
fget() to frame buffer if it was the soruce buffer and fput()
will be applied to it after pipe commit done. However there has
extra fput() apply to frame buffer at the time pipe is freed.
This patch fix the problem by  clear MDP_MEMORY_ID_TYPE_FB from
pipe's flags to avoid extra fput() applying to frame buffer.

CRs-fixed: 411394
Change-Id: Ib2b72e6277480b5ace23cda554be485d9d477b3d
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
msm_fb: display: fix iommu leak during base layer swap

Retain RGB1 iommu information during  base layer swap
so that iommu used by RGB1 can be freed back to pool later.

Change-Id: Ibed85179284743dc8a9d1434f0c81626b0567e16
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>