msm: vidc: initialize venus hfi locks during hfi creation

Venus hfi locks were initialized during core init,
which is invoked when the first video instance is
created. If a debugfs command is executed before
starting the first video instance, then video driver
crashes trying to lock an uninitialized mutex.

Change-Id: I472e9de91dada94a2728dd02c747e7fde63e3e4f
Signed-off-by: Arun Menon <avmenon@codeaurora.org>
msm: vidc: Re-program the vbif settings post-power collapse

As part of power collapse we turn off the venus GDSC. When we turn it
back on, we need to re-program the VBIF registers to overwrite the
reset values.

CRs-Fixed: 585609
Change-Id: Ic2ac40274773f9592f510ccb573b9d4920a8647f
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>
msm: vidc: Add min resolution check for video session

Add a check for minimum supported video resolution, based
on firmware capabilities and reject unsupported video sessions.

Change-Id: Ib5a4eb6e6ab66408cf13829e20d3933138f357c1
Signed-off-by: Arun Menon <avmenon@codeaurora.org>
msm: vidc: Add description of LTR Extradata

The missing string descriptor caused a mismatch in array sizes
causing the v4l2 control framework make an out of bounds access.

Change-Id: I9a9f64e16ca95163d800702d94528833f5892537
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>
msm: vidc: Query the core on VIDIOC_G_FMT

Previously we only queried the core for buffer requirements in
VIDIOC_REQBUFS, and relied on that information in _G_FMT.  However,
there's no expectation that the client calls _REQBUFS before _G_FMT,
which leads to stale information being returned as part of _G_FMT.

As such, always retreive fresh info from the core for either ioctl.

Change-Id: Ife94343f4bd4f62da7f2bef4266076ceed409bca
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>
msm: vidc: detect mbaff information from firmware

Firmware will set the FBD flags if mbaff interface
is detected for decoded video bitstream. Previously
the mbaff information was parsed in the v4l2 video
client, but now firmware parses and sends the information.

Change-Id: Ic557cdb7bf49aab3eb29a3f3aa3e363bf7223a36
Signed-off-by: Arun Menon <avmenon@codeaurora.org>