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cpufreq/amd-pstate: Remove "amd_dynamic_epp" cmdline and "dynamic_epp" sysfs

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Since dynamic_epp has been converted to an
"energy_performance_preference", toggling the feature via the sysfs file
or the kernel cmdline is now redundant.

Remove the sysfs file and the "amd_dynamic_epp" cmdline and only depend
on "energy_performance_preference" to toggle dynamic_epp.

Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20260727072056.1248-6-kprateek.nayak@amd.com
Signed-off-by: Mario Limonciello <superm1@kernel.org>
This commit is contained in:
K Prateek Nayak 2026-07-27 07:20:52 +00:00 committed by Mario Limonciello
parent b7294b6275
commit 32692fcf61
1 changed files with 1 additions and 54 deletions
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55
drivers/cpufreq/amd-pstate.c
View File

@ -87,7 +87,6 @@ static struct cpufreq_driver amd_pstate_driver;
static struct cpufreq_driver amd_pstate_epp_driver;
static int cppc_state = AMD_PSTATE_UNDEFINED;
static bool amd_pstate_prefcore = true;
static bool dynamic_epp;
static struct quirk_entry *quirks;
/*
@ -1837,50 +1836,12 @@ static ssize_t prefcore_show(struct device *dev,
return sysfs_emit(buf, "%s\n", str_enabled_disabled(amd_pstate_prefcore));
}
static ssize_t dynamic_epp_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%s\n", str_enabled_disabled(dynamic_epp));
}
static ssize_t dynamic_epp_store(struct device *a, struct device_attribute *b,
const char *buf, size_t count)
{
bool enabled;
int ret;
ret = kstrtobool(buf, &enabled);
if (ret)
return ret;
guard(mutex)(&amd_pstate_driver_lock);
if (cppc_state != AMD_PSTATE_ACTIVE) {
pr_debug("dynamic_epp can only be toggled in active mode\n");
return -EINVAL;
}
/* Nothing to do */
if (dynamic_epp == enabled)
return count;
/* reinitialize with desired dynamic EPP value */
dynamic_epp = enabled;
ret = amd_pstate_change_driver_mode(cppc_state);
if (ret)
dynamic_epp = false;
return ret ? ret : count;
}
static DEVICE_ATTR_RW(status);
static DEVICE_ATTR_RO(prefcore);
static DEVICE_ATTR_RW(dynamic_epp);
static struct attribute *pstate_global_attributes[] = {
&dev_attr_status.attr,
&dev_attr_prefcore.attr,
&dev_attr_dynamic_epp.attr,
NULL
};
@ -1987,10 +1948,7 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
cpudata->current_profile = PLATFORM_PROFILE_BALANCED;
}
if (dynamic_epp)
ret = amd_pstate_set_dynamic_epp(policy);
else
ret = amd_pstate_set_epp(policy, cpudata->epp_default_dc);
ret = amd_pstate_set_epp(policy, cpudata->epp_default_dc);
if (ret)
goto free_cpudata1;
@ -2401,19 +2359,8 @@ static int __init amd_prefcore_param(char *str)
return 0;
}
static int __init amd_dynamic_epp_param(char *str)
{
if (!strcmp(str, "disable"))
dynamic_epp = false;
if (!strcmp(str, "enable"))
dynamic_epp = true;
return 0;
}
early_param("amd_pstate", amd_pstate_param);
early_param("amd_prefcore", amd_prefcore_param);
early_param("amd_dynamic_epp", amd_dynamic_epp_param);
MODULE_AUTHOR("Huang Rui <ray.huang@amd.com>");
MODULE_DESCRIPTION("AMD Processor P-state Frequency Driver");