cpufreq: Add a boostpulse interface to ondemand

For applications that require a one-shot increase in frequency,
the boostpulse interface would help to scale to max for the time
specified in boostime. This helps applications that currently
increases scaling_min_freq and resets later after a fixed duration.
Instead of changing scaling_min_freq applications can directly write
to boostpulse and governer resets during regular timer after the time
expires.

Change-Id: Ie5f490ff06b41364aa76dd468573433495da28a4
Signed-off-by: Narayanan Gopalakrishnan <nargop@codeaurora.org>

Conflicts:

	drivers/cpufreq/cpufreq_ondemand.c
cpufreq: Add cpu utilization statistics to aid decisions made by userspace.

Understanding system load as seen by cpufreq can help userspace
algorithms make better decisions to improve system responsiveness.
One such example would be the MP decision algorithm which mines
various system info to make decisions on hotplugging in/out
the additional cores.

Signed-off-by: Anitha Anand <anithas@codeaurora.org>
(cherry picked from commit cbeef6aafc4964c4a6cfafd26b23eaccd40804b4)

Change-Id: I8a5fb95380af898076fe0e246fb21e3aa48b33b1
Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>
cpufreq: fix utilization statistics for sync cpus

If the cpus are using related_cpus policy, then the
current implementaion will overwrite the the calculated
load for every iteration in the for loop. Hence, mpdecision
will read incorrect value, if the cores are using related
cpus policy. With this change mpdecision will read the
sum of the loads of all cpu's, if related cpu policy is
used.

Change-Id: I242c8fe39fd75dc3e48750a5b78a5d218b536ddd
Signed-off-by: Narayanan Gopalakrishnan <nargop@codeaurora.org>
Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>
cpufreq: notify avg load for short sampling_rate

If the sampling rate is less than 50ms reporting
the actual load may lead to poor decision making
at user space. So, for sampling rates less than 50ms
report the average of load across two samples.

Change-Id: I0d1cf00801732bee8e4380158d7e892758226594
Signed-off-by: Narayanan Gopalakrishnan <nargop@codeaurora.org>

Conflicts:

	drivers/cpufreq/cpufreq_ondemand.c
cpufreq: boost the sampling rate on touch event

For better Ux responsiveness ondemand sampling rate
needs to be 20ms. But, a 20ms sampling rate increases power
consumption. So, boost the sampling rate to 20ms on every
touch event for 2.5 ms and later reset to default rate.
Also, change sampling down factor proportional to the
sampling rate.

Change-Id: I111b1cf3b8ed133347149afc34d329d0384ecfcb
Signed-off-by: Narayanan Gopalakrishnan <nargop@codeaurora.org>

Conflicts:

	drivers/cpufreq/cpufreq_ondemand.c
cpufreq: ondemand: Fix the boostpulse interface

  * Boostpulse was not working because no default frequency was set.
  * We don't need an input handler to push the freq to max, userspace
    does a better job with the Power HAL.
  * Tweak boost time to 500ms

Change-Id: Ice8c26b758747d265976263296a2da3380b864f7

Conflicts:

	drivers/cpufreq/cpufreq_ondemand.c
cpufreq: Fix panic when setting sampling rate

Kernel panics when trying to set the sampling rate before the ondemand
governor CPUFREQ_GOV_START notification is received.

[<c078e500>] panic+0x15c
[<c0012354>] die+0x19c
[<c0018e60>] __do_kernel_fault+0x64
[<c0793660>] do_page_fault+0x3b8
[<c0008514>] do_DataAbort+0x134
[<c0791c58>] __dabt_svc+0x38
[<c02b5c68>] __list_add+0x38
[<c078f1b0>] __mutex_lock_slowpath+0x128
[<c078fc68>] mutex_lock+0x20
[<c05409c4>] store_sampling_rate+0x98
[<c02a6648>] kobj_attr_store+0x18
[<c0183124>] sysfs_write_file+0x108
[<c0131758>] vfs_write+0xac
[<c013188c>] sys_write+0x3c
[<c000e340>] ret_fast_syscall+0x0

Initialize the mutex as part of cpufreq_gov_dbs_init().

Change-Id: Ie9014407d724d7a0a81c076be47df5d08f513407
Signed-off-by: Praveen Chidambaram <pchidamb@codeaurora.org>
msm: cpufreq: Fix the race between dbs_refresh and hotplug.

The demand based switching responds to input events and schedules
work items on all online cpus to increase the frequency. This will
call the dbs_refresh_callback on respective cpu. If this work item
kicks in while cpu1 is progressing its way through cpufreq_add_dev,
there is a chance that work item grabs the cpu_policy_rwsem of cpu1
and relases that of cpu0, when add device is working through releas-
ing lock of cpu1 and reaquiring that of cpu0. This is locking out
cpu1 when it tries to come up online next time. The fix is hold the
hot plug lock while processing refresh work items.

CRs-Fixed: 362444
Change-Id: I57db7c7a9b58369bf059302896f3bf9eca2bc2bb
Signed-off-by: Krishna Vanka <kvanka@codeaurora.org>
cpufreq: Make the "scaling_governor" sysfs node pollable

A userspace module programs different qos-rules depending on the
governor running in the system. Make the governor node
pollable, so that the userspace module can be triggered when
the value of the governor changes.

change-Id: Ic89c77c7d16b0f8954d59a211612e9a8e98a2c28
Signed-off-by: Amar Singhal <asinghal@codeaurora.org>
msm: cpufreq: Fix store_powersave_bias to account for sync' CPUs.

Current code assumes that all online CPUs runs their own timers to
collect CPU samples for demand based switching (dbs). But in case of
synchronous CPUs, ondemand governor registers only one timer at init
time because both CPUs are accounted in the same timer call. Hence
trying to restart/cancel dbs timers for all online CPUs is not legal
for these CPUs. This change fixes above function to restart/cancel
timers only once for group of synchronous CPUs.

Change-Id: I23f1697783a65f125679a07a076620e8fa5e62d5
Signed-off-by: Krishna Vanka <kvanka@codeaurora.org>

Conflicts:

	drivers/cpufreq/cpufreq_ondemand.c
drivers: cpufreq: Send a uevent when governor changes

 * Useful so userspace tools can reconfigure.

Change-Id: Ib423910b8b9ac791ebe81a75bf399f58272f64f2
Fixed building after governor changes
msm_fb: display: add spinlock to protect dma status.

During dma transfer to interface host the status of the dma
needs to be protected in the smp environment.

Change-Id: I02b4f046de7f693bb098343b7345c4aa6ca395bd
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>
Revert "msm_fb: display: Attach and detach MDP IOMMU on suspend/resume"

This reverts commit 74efba797b14b858b340931b75c977c1eba97086.

Conflicts:

	drivers/video/msm/mdp4_overlay.c
	drivers/video/msm/mdp4_overlay_dsi_video.c
msm_fb: display: Increase MDP IOMMU buffer mapping size

Double the MDP IOMMU buffer mapping size to allow overfetching
by hardware for boundary conditions and avoid system crashes
due to page faults.

CRs-Fixed: 378108
CRs-Fixed: 364478
Signed-off-by: Ravishangar Kalyanam <rkalya@codeaurora.org>
Change-Id: Ib19af6b06ab06455acaffcca33830e0487bb0836
(cherry picked from commit 1ed0dae869f6384d23322b78691852d70c573174)
video: msm: Workaround an MDP crash on 8660

 * If an impossibly high clock rate is needed while composing with MDP,
   the hardware will lock up when BLT mode is used.
 * Reproducible on the Galaxy Note by long-pressing power while the
   camera preview is running.
 * Just fail the overlay set so that userspace switches to GPU.

Change-Id: I2a69f967efb90a08efaadbe2d13584ca450f9805
arm: show present cpu instead of online cpu in /proc/cpuinfo

Some userspace applications use /proc/cpuinfo to determine how many CPUs
the system has. CPU hotplug can offline a CPU at runtime and causing the
offline CPU not present in /proc/cpuinfo if we only show online cpu in
/proc/cpuinfo.

CRs-Fixed: 354430
Signed-off-by: Jin Hong <jinh@codeaurora.org>
(cherry picked from commit 1e28794d0ff00fc6567d68b5b4e863b0745cfe20)

Change-Id: I3b38472b690bb3dba67ada74f60cce79ed0b2a7d
Signed-off-by: Ram Kumar Chakravarthy Chebathini <rcheba@codeaurora.org>
vidc: Enable clocks required for secure playback.
Fixed typo
msm:vidc: add support for pause in eos state

This commit will add support for pause command in
eos state along with run state of the video driver.

CRs-fixed: 387562
Change-Id: I2640badb59411757105d59fba276c466d4717e72
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>
(cherry picked from commit da817ebe8a4dea682b2cc9beaa582e0f0f0f0112)