On 2019-04-10 16:03, Viresh Kumar wrote:
On 28-03-19, 20:58, Sibi Sankar wrote:
Add support to parse and update OPP tables attached to the cpu nodes.
Signed-off-by: Sibi Sankar <[email protected]>
---
drivers/cpufreq/qcom-cpufreq-hw.c | 29 +++++++++++++++++++++++++++--
1 file changed, 27 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c
b/drivers/cpufreq/qcom-cpufreq-hw.c
index 4b0b50403901..5c268dd2346c 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -73,6 +73,25 @@ static unsigned int
qcom_cpufreq_hw_fast_switch(struct cpufreq_policy *policy,
return policy->freq_table[index].frequency;
}
+static int qcom_find_update_opp(struct device *cpu_dev, unsigned long
freq,
+ unsigned long volt)
+{
+ int ret;
+ struct dev_pm_opp *opp;
+
+ opp = dev_pm_opp_find_freq_exact(cpu_dev, freq, true);
+ if (IS_ERR(opp)) {
+ ret = dev_pm_opp_add(cpu_dev, freq, volt);
With my comment on the other patch, you can just call
dev_pm_opp_update_voltage() and if that fails then call
dev_pm_opp_add().
yeah that should simplify things.
Also through the above approach I cannot
really disable opps that the OSM does not
support. I can only try enabling opp's that
OSM supports. But that would require all
opp's nodes to start with "disabled" but
that is not allowed I guess.
+ } else {
+ dev_pm_opp_disable(cpu_dev, freq);
+ ret = dev_pm_opp_update_voltage(cpu_dev, freq, volt);
+ dev_pm_opp_enable(cpu_dev, freq);
Perhaps no one else should be using the CPU OPP table at this point of
time and
so we can get away with disable and enable stuff ? Just add a comment
on why
that works.
we can get away without enable/disable here
+ dev_pm_opp_put(opp);
+ }
+
+ return ret;
+}
+
static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
struct cpufreq_policy *policy,
void __iomem *base)
@@ -81,11 +100,16 @@ static int qcom_cpufreq_hw_read_lut(struct device
*cpu_dev,
u32 volt;
unsigned int max_cores = cpumask_weight(policy->cpus);
struct cpufreq_frequency_table *table;
+ int ret;
table = kcalloc(LUT_MAX_ENTRIES + 1, sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
+ ret = dev_pm_opp_of_add_table(cpu_dev);
+ if (ret)
+ dev_dbg(cpu_dev, "Couldn't add OPP table\n");
+
for (i = 0; i < LUT_MAX_ENTRIES; i++) {
data = readl_relaxed(base + REG_FREQ_LUT +
i * LUT_ROW_SIZE);
@@ -104,7 +128,7 @@ static int qcom_cpufreq_hw_read_lut(struct device
*cpu_dev,
if (freq != prev_freq && core_count == max_cores) {
table[i].frequency = freq;
- dev_pm_opp_add(cpu_dev, freq * 1000, volt);
+ qcom_find_update_opp(cpu_dev, freq * 1000, volt);
dev_dbg(cpu_dev, "index=%d freq=%d, core_count %d\n", i,
freq, core_count);
} else {
@@ -125,7 +149,8 @@ static int qcom_cpufreq_hw_read_lut(struct device
*cpu_dev,
if (prev_cc != max_cores) {
prev->frequency = prev_freq;
prev->flags = CPUFREQ_BOOST_FREQ;
- dev_pm_opp_add(cpu_dev, prev_freq * 1000, volt);
+ qcom_find_update_opp(cpu_dev, prev_freq * 1000,
+ volt);
}
break;
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora
Forum,
a Linux Foundation Collaborative Project
--
-- Sibi Sankar --
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project.
