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thermal/int340x_thermal: Export OEM vendor variables

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The platform vendor may expose an array of OEM-specific values to be used
in determining DPTF policy. These are obtained via the ODVP method, and
then simply exposed in sysfs. In addition, they are updated when a
notification is received or when the DPTF policy is changed by userland.

Conflicts:
	drivers/thermal/intel/int340x_thermal/int3400_thermal.c

Signed-off-by: Matthew Garrett <mjg59@google.com>
Tested-by: Pandruvada, Srinivas <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20200414020953.255364-2-matthewgarrett@google.com
This commit is contained in:
Matthew Garrett 2020-04-13 19:09:52 -07:00 committed by Daniel Lezcano
parent 0ba13c763a
commit 006f006f1e
1 changed files with 131 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

132
drivers/thermal/intel/int340x_thermal/int3400_thermal.c
View File

@ -13,6 +13,7 @@
#include "acpi_thermal_rel.h"
#define INT3400_THERMAL_TABLE_CHANGED 0x83
#define INT3400_ODVP_CHANGED 0x88
enum int3400_thermal_uuid {
INT3400_THERMAL_PASSIVE_1,
@ -41,8 +42,11 @@ static char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
"BE84BABF-C4D4-403D-B495-3128FD44dAC1",
};
struct odvp_attr;
struct int3400_thermal_priv {
struct acpi_device *adev;
struct platform_device *pdev;
struct thermal_zone_device *thermal;
int mode;
int art_count;
@ -53,6 +57,17 @@ struct int3400_thermal_priv {
int rel_misc_dev_res;
int current_uuid_index;
char *data_vault;
int odvp_count;
int *odvp;
struct odvp_attr *odvp_attrs;
};
static int evaluate_odvp(struct int3400_thermal_priv *priv);
struct odvp_attr {
int odvp;
struct int3400_thermal_priv *priv;
struct kobj_attribute attr;
};
static ssize_t data_vault_read(struct file *file, struct kobject *kobj,
@ -210,9 +225,110 @@ static int int3400_thermal_run_osc(acpi_handle handle,
result = -EPERM;
kfree(context.ret.pointer);
return result;
}
static ssize_t odvp_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
struct odvp_attr *odvp_attr;
odvp_attr = container_of(attr, struct odvp_attr, attr);
return sprintf(buf, "%d\n", odvp_attr->priv->odvp[odvp_attr->odvp]);
}
static void cleanup_odvp(struct int3400_thermal_priv *priv)
{
int i;
if (priv->odvp_attrs) {
for (i = 0; i < priv->odvp_count; i++) {
sysfs_remove_file(&priv->pdev->dev.kobj,
&priv->odvp_attrs[i].attr.attr);
kfree(priv->odvp_attrs[i].attr.attr.name);
}
kfree(priv->odvp_attrs);
}
kfree(priv->odvp);
priv->odvp_count = 0;
}
static int evaluate_odvp(struct int3400_thermal_priv *priv)
{
struct acpi_buffer odvp = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj = NULL;
acpi_status status;
int i, ret;
status = acpi_evaluate_object(priv->adev->handle, "ODVP", NULL, &odvp);
if (ACPI_FAILURE(status)) {
ret = -EINVAL;
goto out_err;
}
obj = odvp.pointer;
if (obj->type != ACPI_TYPE_PACKAGE) {
ret = -EINVAL;
goto out_err;
}
if (priv->odvp == NULL) {
priv->odvp_count = obj->package.count;
priv->odvp = kmalloc_array(priv->odvp_count, sizeof(int),
GFP_KERNEL);
if (!priv->odvp) {
ret = -ENOMEM;
goto out_err;
}
}
if (priv->odvp_attrs == NULL) {
priv->odvp_attrs = kcalloc(priv->odvp_count,
sizeof(struct odvp_attr),
GFP_KERNEL);
if (!priv->odvp_attrs) {
ret = -ENOMEM;
goto out_err;
}
for (i = 0; i < priv->odvp_count; i++) {
struct odvp_attr *odvp = &priv->odvp_attrs[i];
sysfs_attr_init(&odvp->attr.attr);
odvp->priv = priv;
odvp->odvp = i;
odvp->attr.attr.name = kasprintf(GFP_KERNEL,
"odvp%d", i);
if (!odvp->attr.attr.name) {
ret = -ENOMEM;
goto out_err;
}
odvp->attr.attr.mode = 0444;
odvp->attr.show = odvp_show;
odvp->attr.store = NULL;
ret = sysfs_create_file(&priv->pdev->dev.kobj,
&odvp->attr.attr);
if (ret)
goto out_err;
}
}
for (i = 0; i < obj->package.count; i++) {
if (obj->package.elements[i].type == ACPI_TYPE_INTEGER)
priv->odvp[i] = obj->package.elements[i].integer.value;
}
kfree(obj);
return 0;
out_err:
cleanup_odvp(priv);
kfree(obj);
return ret;
}
static void int3400_notify(acpi_handle handle,
u32 event,
void *data)
@ -236,6 +352,9 @@ static void int3400_notify(acpi_handle handle,
kobject_uevent_env(&priv->thermal->device.kobj, KOBJ_CHANGE,
thermal_prop);
break;
case INT3400_ODVP_CHANGED:
evaluate_odvp(priv);
break;
default:
/* Ignore unknown notification codes sent to INT3400 device */
break;
@ -285,6 +404,9 @@ static int int3400_thermal_set_mode(struct thermal_zone_device *thermal,
priv->current_uuid_index,
enable);
}
evaluate_odvp(priv);
return result;
}
@ -338,6 +460,7 @@ static int int3400_thermal_probe(struct platform_device *pdev)
if (!priv)
return -ENOMEM;
priv->pdev = pdev;
priv->adev = adev;
result = int3400_thermal_get_uuids(priv);
@ -358,6 +481,8 @@ static int int3400_thermal_probe(struct platform_device *pdev)
int3400_setup_gddv(priv);
evaluate_odvp(priv);
priv->thermal = thermal_zone_device_register("INT3400 Thermal", 0, 0,
priv, &int3400_thermal_ops,
&int3400_thermal_params, 0, 0);
@ -389,8 +514,11 @@ static int int3400_thermal_probe(struct platform_device *pdev)
return 0;
free_sysfs:
if (priv->data_vault)
cleanup_odvp(priv);
if (priv->data_vault) {
sysfs_remove_group(&pdev->dev.kobj, &data_attribute_group);
kfree(priv->data_vault);
}
free_uuid:
sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group);
free_rel_misc:
@ -413,6 +541,8 @@ static int int3400_thermal_remove(struct platform_device *pdev)
priv->adev->handle, ACPI_DEVICE_NOTIFY,
int3400_notify);
cleanup_odvp(priv);
if (!priv->rel_misc_dev_res)
acpi_thermal_rel_misc_device_remove(priv->adev->handle);