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From:   Vincent Guittot <vincent.guittot@linaro.org>
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Cc:     conor.dooley@microchip.com, suagrfillet@gmail.com,
        ajones@ventanamicro.com, lftan@kernel.org,
        Vincent Guittot <vincent.guittot@linaro.org>
Subject: [PATCH v2 6/6] cpufreq/cppc: set the frequency used for capacity computation
Date:   Mon,  9 Oct 2023 12:36:21 +0200
Message-Id: <20231009103621.374412-7-vincent.guittot@linaro.org>
In-Reply-To: <20231009103621.374412-1-vincent.guittot@linaro.org>
References: <20231009103621.374412-1-vincent.guittot@linaro.org>
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cppc cpufreq driver can register an artificial energy model. In such case,
it also have to register the frequency that is used to define the CPU
capacity

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
---
 drivers/cpufreq/cppc_cpufreq.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index fe08ca419b3d..24c6ba349f01 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -636,6 +636,21 @@ static int populate_efficiency_class(void)
 	return 0;
 }
 
+
+static void cppc_cpufreq_set_capacity_ref_freq(struct cpufreq_policy *policy)
+{
+	struct cppc_perf_caps *perf_caps;
+	struct cppc_cpudata *cpu_data;
+	unsigned int ref_freq;
+
+	cpu_data = policy->driver_data;
+	perf_caps = &cpu_data->perf_caps;
+
+	ref_freq = cppc_cpufreq_perf_to_khz(cpu_data, perf_caps->highest_perf);
+
+	per_cpu(capacity_ref_freq, policy->cpu) = ref_freq;
+}
+
 static void cppc_cpufreq_register_em(struct cpufreq_policy *policy)
 {
 	struct cppc_cpudata *cpu_data;
@@ -643,6 +658,9 @@ static void cppc_cpufreq_register_em(struct cpufreq_policy *policy)
 		EM_ADV_DATA_CB(cppc_get_cpu_power, cppc_get_cpu_cost);
 
 	cpu_data = policy->driver_data;
+
+	cppc_cpufreq_set_capacity_ref_freq(policy);
+
 	em_dev_register_perf_domain(get_cpu_device(policy->cpu),
 			get_perf_level_count(policy), &em_cb,
 			cpu_data->shared_cpu_map, 0);
-- 
2.34.1