diff options
| author | Alex Frid <afrid@nvidia.com> | 2010-06-08 20:49:07 -0700 |
|---|---|---|
| committer | Gary King <gking@nvidia.com> | 2010-06-10 08:59:30 -0700 |
| commit | 9135f4cd777f6bf20e9b3e90139aa47334e26e0b (patch) | |
| tree | 89990e73b0319c71ba5a32ebf57e8764bc478f71 /arch/arm/mach-tegra/cpuidle.c | |
| parent | 3f056ef87f5256910945e4907ca52ec040be7fe5 (diff) | |
[ARM/tegra] RM: expanded CPU power off (LP2) policies.
Expanded CPU power off (LP2 state) policies as follows:
(a) "Enter in Low Corner" - LP2 is entered and DVFS tick interrupt is
masked only when DVFS is in low corner.
(b) "Mask in Low Corner" - LP2 is entered independently of DVFS, but DVFS
tick interrupt is masked only when low corner is hit
(c) "Ignore Low Corner" - LP2 is entered and DVFS tick interrupt is masked
independently of DVFS low corner.
Ported from android-tegra-2.6.29, but set default policy to (c), which is
the same as current android-tegra-2.6.32 kernel behavior (on 2.6.29 kernel
(a) was default).
Added sysfs node to change and evaluate policies.
Change-Id: I22e89f4d58dfa2e2fb668154c1ae2cd301fbe1ca
Reviewed-on: http://git-master/r/2359
Tested-by: Aleksandr Frid <afrid@nvidia.com>
Reviewed-by: Gary King <gking@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/cpuidle.c')
| -rw-r--r-- | arch/arm/mach-tegra/cpuidle.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c index bea34e6d622c..e2a61708fc86 100644 --- a/arch/arm/mach-tegra/cpuidle.c +++ b/arch/arm/mach-tegra/cpuidle.c @@ -87,6 +87,7 @@ static int tegra_idle_enter_lp3(struct cpuidle_device *dev, return (int)us; } +extern bool tegra_nvrm_lp2_allowed(void); extern unsigned int tegra_suspend_lp2(unsigned int); static int tegra_idle_enter_lp2(struct cpuidle_device *dev, @@ -102,7 +103,7 @@ static int tegra_idle_enter_lp2(struct cpuidle_device *dev, smp_rmb(); request = ktime_to_us(tick_nohz_get_sleep_length()); if (!lp2_supported || request <= state->exit_latency || - system_is_suspending) { + system_is_suspending || (!tegra_nvrm_lp2_allowed())) { dev->last_state = &dev->states[0]; return tegra_idle_enter_lp3(dev, &dev->states[0]); } |