Intellidemand Governor

intellidemand: enable touch boost for new touch screen device

Signed-off-by: Paul Reioux <reioux@gmail.com>
intellidemand: add new power_suspend PM driver

bump version to 4.4

Signed-off-by: Paul Reioux <reioux@gmail.com>
intellidemand: more SOC 8794 specific tweaks

Signed-off-by: Paul Reioux <reioux@gmail.com>
cpufreq: intellidemand: more default settings for Snapdragon 800 Socs

Signed-off-by: Paul Reioux <reioux@gmail.com>
cpufreq: intellidemand: update default settings for Snapdragon 800 Socs

Signed-off-by: Paul Reioux <reioux@gmail.com>
cpufreq: intellidemand: remove deprecated early_suspend drivers

and also remove LMF since it depended on early_suspend driver

bump version to 4.3

Signed-off-by: Paul Reioux <reioux@gmail.com>
Intellidemand: limit min cpu perflock to boot cpu only

Signed-off-by: Paul Reioux <reioux@gmail.com>
intellidemand: re-enable performance lock option

with low freq enabled kernels, minimum performance lock will help music
playback to be smooth and glitch free

Signed-off-by: Paul Reioux <reioux@gmail.com>
intellidemand: set default sampling rate to 50k

Signed-off-by: Paul Reioux <reioux@gmail.com>
intellidemand: enable sec_touchscreen input boosting

Signed-off-by: Paul Reioux <reioux@gmail.com>
intellidemand: tweak optimal for krait 600 series

Signed-off-by: Paul Reioux <reioux@gmail.com>
cpufreq: intellidemand: Fix optimal_freq logic on ramp down

When ondemand governor decides to ramp down the frequency, the missing
check for frequency being lower than optimal_freq was causing frequency
to be ramped down to optimal_freq even if the frequency decided by ondemand
governor was higher.

Change-Id: I00f9ae4c61ccda4039f3338dee2c29b8cb790be4
Signed-off-by: Veena Sambasivan <veenas@codeaurora.org>
Signed-off-by: Paul Reioux <reioux@gmail.com>
cpufreq: intellidemand: Set MIN_LATENCY_MULTIPLIER to 20

Currently MIN_LATENCY_MULTIPLIER is set defined as 100 and so on a system with
transition latency of 1 ms, the minimum sampling time comes to be around 100 ms.
That is quite big if you want to get better performance for your system.

Redefine MIN_LATENCY_MULTIPLIER to 20 so that we can support 20ms sampling rate
for such platforms.

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: fix permission for sampling_rate as well

to work with Android's PowerHAL

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: change permission for boostpulse from root to system

for use with Android PowerHAL

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: change boost tunable scope from global to local

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: allow clean compilation when LMF is disabled

bumped version to 4.2

Signed-off-by: faux123 <reioux@gmail.com>

Conflicts:
	arch/arm/mach-msm/cpufreq.c
intellidemand: Don't update the policy->cur upon cpufreq driver failure

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: remove unused min performance lock defines

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: remove eco mode option (replaced by intelli_plug)

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: remove cpu cores autoplug capability (replaced by intelli_plug)

Signed-off-by: faux123 <reioux@gmail.com>

Conflicts:
	drivers/cpufreq/Kconfig
intellidemand: add default values for dbs sync and optimal tuneables

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: give intellidemand's cpu_dbs_info its own name

Signed-off-by: Paul Reioux <reioux@gmail.com>
intellidemand: Add support to consider other cpu load when scaling frequencies

Currently only current cpu load is considered when frequency scaling.
As a side effect of this when scheduler migrates a thread to a slower
core, the execution time increases unexpectedly.

The new algorithm not only considers current cpu load for frequency
scaling, but also takes into account load of other online cpus. The
treshold for this can be controlled using up_threshold_any_cpu_load.
When the up_threshold_any_cpu_load is crossed in any cpu then the
current cpu is set to sync_freq.

Also, when more than one cpu is online a two step ramp-up mechanism
is used. When the up_threshold_multi_core is crossed the cpu is ramped
up to optimal_freq which is less than policy->max and set to a power
friendly value.

Change-Id: I64bed1b142cde1f239e73aa1f78981c78aaf59ce
Signed-off-by: Narayanan Gopalakrishnan <nargop@codeaurora.org>

intellidemand: Fix kernel warning in cpufreq_governor_dbs

GOV_STOP event destroys the timer_mutex and is not initialized back
upon GOV_START event.
The Kernel complains at mutex_lock(during GOV_LIMITS event) after
mutex_destroy.

[<c0014918>] (unwind_backtrace+0x0/0x11c)
[<c007c004>] (warn_slowpath_common+0x4c/0x64)
[<c007c034>] (warn_slowpath_null+0x18/0x1c)
[<c079eef8>] (__mutex_lock_slowpath+0x130/0x3c4)
[<c079f1ac>] (mutex_lock+0x20/0x3c) from [<c0540900>]
[<c0540900>] (cpufreq_governor_dbs+0x3c8/0x468)
[<c053d500>] (__cpufreq_governor+0x90/0xe0)
[<c053d774>] (__cpufreq_set_policy+0x224/0x258)
[<c053da58>] (cpufreq_add_dev_interface+0x2b0/0x308)
[<c053e784>] (cpufreq_add_dev+0x500/0x56c)
[<c079247c>] (cpufreq_cpu_callback+0x88/0x9c)
[<c07a2ca8>] (notifier_call_chain+0x38/0x68)
[<c007ded0>] (__cpu_notify+0x28/0x40)
[<c0790024>] (_cpu_up+0xe4/0x118)
[<c0790024>] (cpu_up+0x64/0x80)
[<c0765840>] (store_online+0x48/0x78)
[<c038d0c8>] (dev_attr_store+0x18/0x24)
[<c017be40>] (sysfs_write_file+0x108/0x13c)
[<c012cdfc>] (vfs_write+0xb0/0x128)
[<c012d034>](sys_write+0x38/0x64)

Change-Id: Ie2a796b17209243de731ccf2ab04b7f9e7048df8
Signed-off-by: Anji Jonnala <anjir@codeaurora.org>

Adapted for Intellidemand from CAF reference

Signed-off-by: faux123 <reioux@gmail.com>
cpufreq: Avoid using smp_processor_id() in preemptible context

Even though this work item runs on only one cpu at a time (due to
queue_work_on()) it is possible for the work item to be preempted
and so use of smp_processor_id() is illegal.

BUG: using smp_processor_id() in preemptible [00000000]
code: kworker/3:1/4162 caller is dbs_refresh_callback+0xc/0x188
[<c00151b0>] (unwind_backtrace+0x0/0x120) from [<c0279058>]
(debug_smp_processor_id+0xbc/0xf0)
[<c0279058>] (debug_smp_processor_id+0xbc/0xf0) from [<c0454b54>]
(dbs_refresh_callback+0xc/0x188)
[<c0454b54>] (dbs_refresh_callback+0xc/0x188) from [<c0087290>]
(process_one_work+0x354/0x648)
[<c0087290>] (process_one_work+0x354/0x648) from [<c0089754>]
(worker_thread+0x1a8/0x2a8)
[<c0089754>] (worker_thread+0x1a8/0x2a8) from [<c008e480>]
(kthread+0x90/0xa0)
[<c008e480>] (kthread+0x90/0xa0) from [<c000f438>]
(kernel_thread_exit+0x0/0x8)

The intent of the code is to determine which CPU this work item
is running on, which we can easily do by passing that information
in a wrapper struct around the work struct. Do this so we avoid
this problem.

Change-Id: I05ca0ff2b3cbaa239930463ea0760e3e9d75145f
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
adapted for Intellidemand from CAF reference

Signed-off-by: faux123 <reioux@gmail.com>
Intellidemand: adjust the nr_run hysteresis for better UI response

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: tweak for not using min performance lock

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: add eco mode (dual core operations) bump version to 4.1

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: increase boost duration to 2.5 seconds from 1.5

Signed-off-by: faux123 <reioux@gmail.com>
Intellidemand: put cores 1~3 to sleep while screen is off

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: code derps clean up!

Signed-off-by: faux123 <reioux@gmail.com>
Intellidemand: update for quadcore operations. bump version to 4.0

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: add minimum cpu performance lock

a minimum cpu frequency performance lock is add to ensure smooth
operations when only 1 core is active

Signed-off-by: faux123 <reioux@gmail.com>

Conflicts:
	drivers/cpufreq/Kconfig

Conflicts:

	drivers/cpufreq/Kconfig
intellidemand: add a run queue persistence to determine browsing state

persistence will allow for better browsing state detection rather than just
purely based on run queue depth alone

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: add bug fixes

 - Fix crash input event handler on governor switch
 - Fix panic when setting sampling rate

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: Add boost pulse capability

Boost pulse increases UI performance by increasing CPU freq and
reduce sampling time.

forward ported for Linux 3.4 for use on Mako
Signed-off-by: faux123 <reioux@gmail.com>
cpufreq/cpufreq_intellidemand: intellidemand cpufreq
 governor (version 4.0)

Intellidemand is inspired by ondemand governor. Its main features are:

 - auto cpu hotplugging based on runnable thread average calculations
 - detection of browsing mode (long screen on activities with moderate run
   queue depth =< 45 )
 - limit max frequencies when in browsing mode to conserve battery for long
   duration tasks

Browsing State Determination:
 1- Browsing state is enabled as power-on default. Browsing state is disabled
    when run queue depth is > 45 (very high instantaneous spikes)

Browsing State Limit Max Freq Logic (sliding window algorithm):
 1- While Screen is ON > 3 min, and average load of the CPU is < 35%, then
    CPU Max frequencies will remain power-on default
 2- While Screen is On, if average CPU load > 35%, both CPUs max frequencies
    will be limited to a lower user configurable max value
 3- While Screen is On, After both CPUs' Max is limited to lowered max, when
    the average CPU load has dropped down to less than < 25%, then both CPUs
    Max freq will be restored to back to power-on default

Runnable Thread Auto-hotplug (fast hotplug / slow unplug algorithm):
 1- When average number of running thread is < threshold, 2nd cpu will be
    unplugged.
 2- When > threshold, 2nd cpu will be hotplugged.
 3- The logic applies a fast hotplug and slow unplug algorithm so 2nd core
    will stay enabled longer to help deal with performance spikes

changes from Ver 2.0 -> Ver 3.0:
  - remove GPU Busy dependency for browsing state detection (this will make
    the governor more portable to other platforms without specific GPU
    architecture knowledge)

dependencies:
  -- Qualcomm's run queue average logic (SOC independent logic)
  -- TI's runnable thread average logic (SOC independent logic)

forward ported to Linux 3.4 for use on S-800

Signed-off-by: Paul Reioux <reioux@gmail.com>
mach-msm: cpufreq: remove deprecated early_suspend drivers

--pretains to intellidemand

Signed-off-by: Paul Reioux <reioux@gmail.com>
exp: intellidemand 5.0

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:
	drivers/cpufreq/cpufreq_intellidemand.c
intellidemand: remove sampling rate updates based on suspend

this is causing a rare race condition where every once in a while, the phone
will not wake up properly from a suspend/resume cycle.  Disable for now
until I have more time to debug this properly

Signed-off-by: Paul Reioux <reioux@gmail.com>