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cpufreq: qcom: Don't add frequencies without an OPP

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The driver currently adds all frequencies from the hardware LUT to
the cpufreq table, regardless of whether the corresponding OPP
exists. This prevents devices from disabling certain OPPs through
the device tree and can result in CPU frequencies for which the
interconnect bandwidth can't be adjusted. Only add frequencies
with an OPP entry.

Fixes: 55538fbc79 ("cpufreq: qcom: Read voltage LUT and populate OPP")
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Matthias Kaehlcke 2020-09-15 10:10:54 -07:00 committed by Viresh Kumar
parent 49b59f4c35
commit bc9b9c5ab9
1 changed files with 15 additions and 6 deletions
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21
drivers/cpufreq/qcom-cpufreq-hw.c
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@ -187,10 +187,15 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
freq = cpu_hw_rate / 1000;
if (freq != prev_freq && core_count != LUT_TURBO_IND) {
table[i].frequency = freq;
qcom_cpufreq_update_opp(cpu_dev, freq, volt);
dev_dbg(cpu_dev, "index=%d freq=%d, core_count %d\n", i,
if (!qcom_cpufreq_update_opp(cpu_dev, freq, volt)) {
table[i].frequency = freq;
dev_dbg(cpu_dev, "index=%d freq=%d, core_count %d\n", i,
freq, core_count);
} else {
dev_warn(cpu_dev, "failed to update OPP for freq=%d\n", freq);
table[i].frequency = CPUFREQ_ENTRY_INVALID;
}
} else if (core_count == LUT_TURBO_IND) {
table[i].frequency = CPUFREQ_ENTRY_INVALID;
}
@ -207,9 +212,13 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
* as the boost frequency
*/
if (prev->frequency == CPUFREQ_ENTRY_INVALID) {
prev->frequency = prev_freq;
prev->flags = CPUFREQ_BOOST_FREQ;
qcom_cpufreq_update_opp(cpu_dev, prev_freq, volt);
if (!qcom_cpufreq_update_opp(cpu_dev, prev_freq, volt)) {
prev->frequency = prev_freq;
prev->flags = CPUFREQ_BOOST_FREQ;
} else {
dev_warn(cpu_dev, "failed to update OPP for freq=%d\n",
freq);
}
}
break;