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platform/x86/amd/pmf: Add sysfs to toggle CnQF

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Whether to turn CnQF on/off by default upon driver load would be decided
by a BIOS flag. Add a sysfs node to provide a way to the user whether to
use static slider or CnQF .

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20220922131202.56529-3-Shyam-sundar.S-k@amd.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Shyam Sundar S K 2022-09-22 18:42:01 +05:30 committed by Hans de Goede
parent 1738061c9e
commit 3dae582529
3 changed files with 67 additions and 0 deletions
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60
drivers/platform/x86/amd/pmf/cnqf.c
View file

@ -302,6 +302,66 @@ static int amd_pmf_load_defaults_cnqf(struct amd_pmf_dev *dev)
return 0;
}
static ssize_t cnqf_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct amd_pmf_dev *pdev = dev_get_drvdata(dev);
int mode, result, src;
bool input;
mode = amd_pmf_get_pprof_modes(pdev);
if (mode < 0)
return mode;
result = kstrtobool(buf, &input);
if (result)
return result;
src = amd_pmf_cnqf_get_power_source(pdev);
pdev->cnqf_enabled = input;
if (pdev->cnqf_enabled && pdev->current_profile == PLATFORM_PROFILE_BALANCED) {
amd_pmf_set_cnqf(pdev, src, config_store.current_mode, NULL);
} else {
if (is_apmf_func_supported(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR))
amd_pmf_update_slider(pdev, SLIDER_OP_SET, mode, NULL);
}
dev_dbg(pdev->dev, "Received CnQF %s\n", input ? "on" : "off");
return count;
}
static ssize_t cnqf_enable_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct amd_pmf_dev *pdev = dev_get_drvdata(dev);
return sysfs_emit(buf, "%s\n", pdev->cnqf_enabled ? "on" : "off");
}
static DEVICE_ATTR_RW(cnqf_enable);
static umode_t cnqf_feature_is_visible(struct kobject *kobj,
struct attribute *attr, int n)
{
struct device *dev = kobj_to_dev(kobj);
struct amd_pmf_dev *pdev = dev_get_drvdata(dev);
return pdev->cnqf_supported ? attr->mode : 0;
}
static struct attribute *cnqf_feature_attrs[] = {
&dev_attr_cnqf_enable.attr,
NULL
};
const struct attribute_group cnqf_feature_attribute_group = {
.is_visible = cnqf_feature_is_visible,
.attrs = cnqf_feature_attrs,
};
void amd_pmf_deinit_cnqf(struct amd_pmf_dev *dev)
{
cancel_delayed_work_sync(&dev->work_buffer);

6
drivers/platform/x86/amd/pmf/core.c
View file

@ -391,10 +391,16 @@ static int amd_pmf_remove(struct platform_device *pdev)
return 0;
}
static const struct attribute_group *amd_pmf_driver_groups[] = {
&cnqf_feature_attribute_group,
NULL,
};
static struct platform_driver amd_pmf_driver = {
.driver = {
.name = "amd-pmf",
.acpi_match_table = amd_pmf_acpi_ids,
.dev_groups = amd_pmf_driver_groups,
},
.probe = amd_pmf_probe,
.remove = amd_pmf_remove,

1
drivers/platform/x86/amd/pmf/pmf.h
View file

@ -422,5 +422,6 @@ int apmf_get_dyn_slider_def_dc(struct amd_pmf_dev *pdev, struct apmf_dyn_slider_
int amd_pmf_init_cnqf(struct amd_pmf_dev *dev);
void amd_pmf_deinit_cnqf(struct amd_pmf_dev *dev);
int amd_pmf_trans_cnqf(struct amd_pmf_dev *dev, int socket_power, ktime_t time_lapsed_ms);
extern const struct attribute_group cnqf_feature_attribute_group;
#endif /* PMF_H */