diff options
Diffstat (limited to 'drivers/devfreq')
| -rw-r--r-- | drivers/devfreq/tegra30-devfreq.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c index 852bde6249c7..3bd920829bfd 100644 --- a/drivers/devfreq/tegra30-devfreq.c +++ b/drivers/devfreq/tegra30-devfreq.c @@ -96,9 +96,10 @@ struct tegra_devfreq_device_config { unsigned int boost_down_threshold; /* - * Threshold of activity (cycles) below which the CPU frequency isn't - * to be taken into account. This is to avoid increasing the EMC - * frequency when the CPU is very busy but not accessing the bus often. + * Threshold of activity (cycles translated to kHz) below which the + * CPU frequency isn't to be taken into account. This is to avoid + * increasing the EMC frequency when the CPU is very busy but not + * accessing the bus often. */ u32 avg_dependency_threshold; }; @@ -126,7 +127,7 @@ static const struct tegra_devfreq_device_config actmon_device_configs[] = { .boost_down_coeff = 90, .boost_up_threshold = 27, .boost_down_threshold = 10, - .avg_dependency_threshold = 50000, + .avg_dependency_threshold = 16000, /* 16MHz in kHz units */ }, }; @@ -311,7 +312,6 @@ static unsigned long actmon_device_target_freq(struct tegra_devfreq *tegra, target_freq = dev->avg_count / ACTMON_SAMPLING_PERIOD; avg_sustain_coef = 100 * 100 / dev->config->boost_up_threshold; target_freq = do_percent(target_freq, avg_sustain_coef); - target_freq += dev->boost_freq; return target_freq; } @@ -322,15 +322,18 @@ static void actmon_update_target(struct tegra_devfreq *tegra, unsigned long cpu_freq = 0; unsigned long static_cpu_emc_freq = 0; - if (dev->config->avg_dependency_threshold) { + dev->target_freq = actmon_device_target_freq(tegra, dev); + + if (dev->config->avg_dependency_threshold && + dev->config->avg_dependency_threshold <= dev->target_freq) { cpu_freq = cpufreq_quick_get(0); static_cpu_emc_freq = actmon_cpu_to_emc_rate(tegra, cpu_freq); - } - dev->target_freq = actmon_device_target_freq(tegra, dev); - - if (dev->avg_count >= dev->config->avg_dependency_threshold) + dev->target_freq += dev->boost_freq; dev->target_freq = max(dev->target_freq, static_cpu_emc_freq); + } else { + dev->target_freq += dev->boost_freq; + } } static irqreturn_t actmon_thread_isr(int irq, void *data) @@ -396,15 +399,16 @@ static unsigned long tegra_actmon_cpufreq_contribution(struct tegra_devfreq *tegra, unsigned int cpu_freq) { + struct tegra_devfreq_device *actmon_dev = &tegra->devices[MCCPU]; unsigned long static_cpu_emc_freq, dev_freq; + dev_freq = actmon_device_target_freq(tegra, actmon_dev); + /* check whether CPU's freq is taken into account at all */ - if (tegra->devices[MCCPU].avg_count < - tegra->devices[MCCPU].config->avg_dependency_threshold) + if (dev_freq < actmon_dev->config->avg_dependency_threshold) return 0; static_cpu_emc_freq = actmon_cpu_to_emc_rate(tegra, cpu_freq); - dev_freq = actmon_device_target_freq(tegra, &tegra->devices[MCCPU]); if (dev_freq >= static_cpu_emc_freq) return 0; |