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| author | Vincent Donnefort <vincent.donnefort@arm.com> | 2021-09-08 15:05:28 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-10-05 16:33:05 +0200 |
| commit | 1f39fa0dccff71d4788089b5e617229b19166867 (patch) | |
| tree | 8fca331769b0d13de90357c1590d783c2633ea5c /drivers/cpufreq/cpufreq.c | |
| parent | 442d24a5c49a8ed1008dcb9c06dc463d12421e7f (diff) | |
| download | linux-stable-1f39fa0dccff71d4788089b5e617229b19166867.tar.gz linux-stable-1f39fa0dccff71d4788089b5e617229b19166867.tar.bz2 linux-stable-1f39fa0dccff71d4788089b5e617229b19166867.zip | |
cpufreq: Introducing CPUFREQ_RELATION_E
This newly introduced flag can be applied by a governor to a CPUFreq
relation, when looking for a frequency within the policy table. The
resolution would then only walk through efficient frequencies.
Even with the flag set, the policy max limit will still be honoured. If no
efficient frequencies can be found within the limits of the policy, an
inefficient one would be returned.
Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 284e940084c6..8069a7bac9ef 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2260,8 +2260,16 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy, !(cpufreq_driver->flags & CPUFREQ_NEED_UPDATE_LIMITS)) return 0; - if (cpufreq_driver->target) + if (cpufreq_driver->target) { + /* + * If the driver hasn't setup a single inefficient frequency, + * it's unlikely it knows how to decode CPUFREQ_RELATION_E. + */ + if (!policy->efficiencies_available) + relation &= ~CPUFREQ_RELATION_E; + return cpufreq_driver->target(policy, target_freq, relation); + } if (!cpufreq_driver->target_index) return -EINVAL; |