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qcom-cpufreq: Cache the resolved frequency index

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This driver implements resolved_freq and target methods.
Since target method does not know the resolved frequency
index, the frequency table look up is needed again. We
can optimize this by caching the resolved frequency
index in the resolved_freq method.

Change-Id: Ib303ef57c51ce50de52b759728bc8c162a90dc29
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Rohit Gupta <rohgup@codeaurora.org>
[avilaj@codeaurora.org: Fix some merge conflicts]
Signed-off-by: Jonathan Avila <avilaj@codeaurora.org>
This commit is contained in:
Pavankumar Kondeti
2017-10-18 08:28:16 +05:30
committed by Jonathan Avila
parent 2d7062186f
commit fdfe60b6de
1 changed files with 17 additions and 2 deletions
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19
drivers/cpufreq/qcom-cpufreq.c
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@@ -34,6 +34,8 @@ struct cpufreq_suspend_t {
};
static DEFINE_PER_CPU(struct cpufreq_suspend_t, suspend_data);
static DEFINE_PER_CPU(int, cached_resolve_idx);
static DEFINE_PER_CPU(unsigned int, cached_resolve_freq);
static int set_cpu_freq(struct cpufreq_policy *policy, unsigned int new_freq,
unsigned int index)
@@ -66,6 +68,7 @@ static int msm_cpufreq_target(struct cpufreq_policy *policy,
int ret = 0;
int index;
struct cpufreq_frequency_table *table;
int first_cpu = cpumask_first(policy->related_cpus);
mutex_lock(&per_cpu(suspend_data, policy->cpu).suspend_mutex);
@@ -80,7 +83,11 @@ static int msm_cpufreq_target(struct cpufreq_policy *policy,
}
table = policy->freq_table;
index = cpufreq_frequency_table_target(policy, target_freq, relation);
if (per_cpu(cached_resolve_freq, first_cpu) == target_freq)
index = per_cpu(cached_resolve_idx, first_cpu);
else
index = cpufreq_frequency_table_target(policy, target_freq,
relation);
pr_debug("CPU[%d] target %d relation %d (%d-%d) selected %d\n",
policy->cpu, target_freq, relation,
@@ -97,10 +104,17 @@ static unsigned int msm_cpufreq_resolve_freq(struct cpufreq_policy *policy,
unsigned int target_freq)
{
int index;
int first_cpu = cpumask_first(policy->related_cpus);
unsigned int freq;
index = cpufreq_frequency_table_target(policy, target_freq,
CPUFREQ_RELATION_L);
return policy->freq_table[index].frequency;
freq = policy->freq_table[index].frequency;
per_cpu(cached_resolve_idx, first_cpu) = index;
per_cpu(cached_resolve_freq, first_cpu) = freq;
return freq;
}
static int msm_cpufreq_verify(struct cpufreq_policy *policy)
@@ -455,6 +469,7 @@ static int __init msm_cpufreq_register(void)
for_each_possible_cpu(cpu) {
mutex_init(&(per_cpu(suspend_data, cpu).suspend_mutex));
per_cpu(suspend_data, cpu).device_suspended = 0;
per_cpu(cached_resolve_freq, cpu) = UINT_MAX;
}
rc = platform_driver_register(&msm_cpufreq_plat_driver);