From: Srinivas Pandruvada Date: Mon, 14 Nov 2016 18:31:11 +0000 (-0800) Subject: cpufreq: intel_pstate: Use CPU load based algorithm for PM_MOBILE X-Git-Tag: v4.14-rc1~1641^2^3~34 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7f7a516ee30a931fa2d257b39f5ef7b9196c56fc;p=platform%2Fkernel%2Flinux-rpi3.git cpufreq: intel_pstate: Use CPU load based algorithm for PM_MOBILE Use get_target_pstate_use_cpu_load() to calculate target P-State for devices, with the preferred power management profile in ACPI FADT set to PM_MOBILE. This may help in resolving some thermal issues caused by low sustained cpu bound workloads. The current algorithm tend to over provision in this case as it doesn't look at the CPU busyness. Also included the fix from Arnd Bergmann to solve compile issue, when CONFIG_ACPI is not defined. Signed-off-by: Srinivas Pandruvada Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 0837175..f07e591 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -1771,6 +1771,19 @@ static void __init copy_pid_params(struct pstate_adjust_policy *policy) pid_params.setpoint = policy->setpoint; } +#ifdef CONFIG_ACPI +static void intel_pstate_use_acpi_profile(void) +{ + if (acpi_gbl_FADT.preferred_profile == PM_MOBILE) + pstate_funcs.get_target_pstate = + get_target_pstate_use_cpu_load; +} +#else +static void intel_pstate_use_acpi_profile(void) +{ +} +#endif + static void __init copy_cpu_funcs(struct pstate_funcs *funcs) { pstate_funcs.get_max = funcs->get_max; @@ -1782,6 +1795,7 @@ static void __init copy_cpu_funcs(struct pstate_funcs *funcs) pstate_funcs.get_vid = funcs->get_vid; pstate_funcs.get_target_pstate = funcs->get_target_pstate; + intel_pstate_use_acpi_profile(); } #ifdef CONFIG_ACPI