msm_fb: display: remove background invert alpha option for alpha drop pipe

When the blended background pipe has dropped alpha and it is going to
be blended with foreground pipe on the next stage,
MDP4_BLEND_BG_ALPHA_FG_CONST is taken. Foreground alpha constant is
0xFF, so we need to use this alpha value to show background, instead
of its inverted value.

Change-Id: I1fe0572f9bb54db6280bcc44117a21b8c0d8b07a
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>
msm_fb: display: add per stage alpha drop detection

Currently, alpha drop detection is done per frame which
means multiple blending stages share same alpha drop status
which does not reflect the alpha effect truly on each blending
stage. This patch enforces that the alpha drop detection
is done per blending stage so that alpha effect is applied
properly at each blending stage.

Change-Id: I2f456623c696192cf3388a635584a4a49d4720a0
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>
msm_fb: display: free base layer pipe at adb stop

Base layer pipe need to be freed at adb stop so that same
pipe can be allocated at adb start.

CRs-fixed: 390644
Change-Id: I948bb27687cfe1c96cc3b071b7bb9bb84b2c52c6
Signed-off-by: Kalyan Thota <kalyant@codeaurora.org>
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>
msm_fb: display: add fput_light to frame buffer

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

Change-Id: I352da1fce99b344c059f615a6fe88cc6e7387d89
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>
Signed-off-by: Iliyan Malchev <malchev@google.com>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
Signed-off-by: Shruthi Krishna <skrish@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>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>
msm_fb: Display: Fix Dithering issue for rgb565 format

Using RGB888 as source format and rgb565 as destination pixel format,
will cause image corruption on the display. Fix this issue by
setting the destination format as RGB888 in MDP and DSI controller
pixel format as RGB565 for DSI specific panels.

CRs-Fixed: 377484
Change-Id: If58976ee9cd4825efb39437170e54796fa2213e0
Signed-off-by: Chandan Uddaraju <chandanu@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
Signed-off-by: Shruthi Krishna <skrish@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>
Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>
msm_fb: display: add mdp clk rate calculation for low vbp

For the panels that have low v_back_porch, if h/w FIR scaling is used,
during vbp time, mdp clk should be fast enough to output a line from 4
input lines. MDP rate equation for very small scaling, e.g. 1 or 2
pixels' upscaling or downscaling cannot cover this case, where
underruns are seen on those panels.

Change-Id: I4f35f98c2c1bc4ef04dfee193427bd3ff674945d
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
msm_fb: display: Add alpha enable check in blend

FIR and M/N scalar when used for downscaling, drops
alpha channel of the given layer. To notify this, alpha_drop flag
is updated accordingly. This flag need not be checked for layers
with no alpha plane. In some scenarios alpha_drop may get enabled
for the layers with no alpha plane and cause issues realted to blend
composition of layers. Check for setting alpha_drop only if source
ayer has alpha plane.

Change-Id: Ie64b30c045a78d0d68eb9efacc76902afae7850d
Signed-off-by: Mayank Chopra <makchopra@codeaurora.org>
msm: display: Fix blend configuration for video layer with MDP composition

With video layer in MDP composition, there is no need to apply destination
over blend rule, as z-order of layers take care of proper staging of layers
by default. Apply constant blend to the video layer when in MDP composition

CRs-fixed: 437965
Change-Id: I7476659f12cdf06018bf6ace829a836c86ae97e8
Signed-off-by: Mayank Chopra <makchopra@codeaurora.org>
msm_fb: Clear real pipe attributes in the pipe free

Clear original pipe attributes in the pipe free call.

Change-Id: I776869e7997e5b70e4c2b102e1a394034247bbcd
Signed-off-by: Kalyan Thota <kalyant@codeaurora.org>
Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>
msm: mdp: Remove mixer1 blt for external

BLT mode is not needed for external displays since
there is no extra downscaling needed for videos.
msm_fb: HACK: wait until completing  backlight control

sleep 300ms until completing the backlight control. and then set
the panel_power_on and bl_updated as false

Change-Id: Ia289cdcd08ad012d192a079dd1b765d74b911be2
msm_fb: clean fb to prevent displaying old fb

clean fb to prevent displaying old fb on resume.

Change-Id: Iab169e7a36b6bd168631bbf9763319ba4388f82d
mdp: Do not start LUT for overlay0

The post processing daemon is not used currently.
Enabling the LUT without using it can potentially
cause display hangs.
video: msm: Commit MDP baselayer pipe on LCDC

* Commit a6ab3c0 introduced this for
  everything except for LCDC.
* We need to commit the pipe or pipes are not unstaged.
video: msm: Configure blend before DMA for LCDC panel too

* Needed to avoid display glitching in BLT mode
msm: rpc: hold spinlock while doing wait_event

To prevent a race condition between wake_up called by
msm_rpcrouter_xprt_notify and wait_event in rr_read
hold a spinlock irqsave to prevent the system from going into
sleep when there is pending SMD data to process.

CRs-Fixed: 393416
Signed-off-by: Angshuman Sarkar <angshuman@codeaurora.org>
(cherry picked from commit 902de08f6670ddba147609e8b9f895dadf2275d9)

Change-Id: Ib7d8a868e1e968fcc8eeca53e2c1c2eeec8dd965
Signed-off-by: Sridhar Gujje <sgujje@codeaurora.org>
Squashed update of kernel from 3.0.65 to 3.0.66