diff options
| author | Alex Frid <afrid@nvidia.com> | 2011-08-24 16:50:57 -0700 |
|---|---|---|
| committer | Rohan Somvanshi <rsomvanshi@nvidia.com> | 2011-08-29 08:27:55 -0700 |
| commit | 0fead6561bf945f5669915b04050850573547cf6 (patch) | |
| tree | 620ed49ce14dc8574e6e884150d49b6cadb8730b | |
| parent | 407a3631a15f22735a9301ebf9dd85920814dce8 (diff) | |
ARM: tegra: power: Fix LP2/LP3 states accounting
Made sure LP3 state is reported as last entered state to cpuidle
governor in case when LP3 is entered as a fall back from LP2 path;
skipped LP2 stats in this case as well.
Change-Id: Ib2d0dd1b7c673b0b8c346a07372505d2345fe1ca
Reviewed-on: http://git-master/r/49109
Tested-by: Aleksandr Frid <afrid@nvidia.com>
Reviewed-by: Scott Williams <scwilliams@nvidia.com>
Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>
| -rw-r--r-- | arch/arm/mach-tegra/cpuidle.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c index 64eff725300d..252bc123f808 100644 --- a/arch/arm/mach-tegra/cpuidle.c +++ b/arch/arm/mach-tegra/cpuidle.c @@ -86,6 +86,9 @@ void tegra_flow_wfi(struct cpuidle_device *dev) dsb(); start_critical_timings(); + + /* can fall back here from LP2 path - tell cpuidle governor */ + dev->last_state = &dev->states[0]; } static int tegra_idle_enter_lp3(struct cpuidle_device *dev, @@ -143,6 +146,10 @@ static int tegra_idle_enter_lp2(struct cpuidle_device *dev, hrtimer_peek_ahead_timers(); smp_rmb(); + + if (state != dev->last_state) + return (int)us; /* skip lp2 stats if we've been in lp3 */ + state->exit_latency = tegra_lp2_exit_latency; state->target_residency = tegra_lp2_exit_latency + tegra_lp2_power_off_time; |