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Merge back ACPI power management material for v5.14.

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This commit is contained in:
Rafael J. Wysocki 2021-06-14 15:37:49 +02:00
commit 3f491a28b1
8 changed files with 79 additions and 71 deletions
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6
drivers/acpi/device_pm.c
View File

@ -20,6 +20,7 @@
#include <linux/pm_runtime.h>
#include <linux/suspend.h>
#include "fan.h"
#include "internal.h"
/**
@ -1310,10 +1311,7 @@ int acpi_dev_pm_attach(struct device *dev, bool power_on)
* with the generic ACPI PM domain.
*/
static const struct acpi_device_id special_pm_ids[] = {
{"PNP0C0B", }, /* Generic ACPI fan */
{"INT3404", }, /* Fan */
{"INTC1044", }, /* Fan for Tiger Lake generation */
{"INTC1048", }, /* Fan for Alder Lake generation */
ACPI_FAN_DEVICE_IDS,
{}
};
struct acpi_device *adev = ACPI_COMPANION(dev);

7
drivers/acpi/fan.c
View File

@ -16,6 +16,8 @@
#include <linux/platform_device.h>
#include <linux/sort.h>
#include "fan.h"
MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION("ACPI Fan Driver");
MODULE_LICENSE("GPL");
@ -24,10 +26,7 @@ static int acpi_fan_probe(struct platform_device *pdev);
static int acpi_fan_remove(struct platform_device *pdev);
static const struct acpi_device_id fan_device_ids[] = {
{"PNP0C0B", 0},
{"INT3404", 0},
{"INTC1044", 0},
{"INTC1048", 0},
ACPI_FAN_DEVICE_IDS,
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, fan_device_ids);

13
drivers/acpi/fan.h Normal file
View File

@ -0,0 +1,13 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* ACPI fan device IDs are shared between the fan driver and the device power
* management code.
*
* Add new device IDs before the generic ACPI fan one.
*/
#define ACPI_FAN_DEVICE_IDS \
{"INT3404", }, /* Fan */ \
{"INTC1044", }, /* Fan for Tiger Lake generation */ \
{"INTC1048", }, /* Fan for Alder Lake generation */ \
{"PNP0C0B", } /* Generic ACPI fan */

2
drivers/acpi/internal.h
View File

@ -142,7 +142,7 @@ int acpi_device_sleep_wake(struct acpi_device *dev,
int acpi_power_get_inferred_state(struct acpi_device *device, int *state);
int acpi_power_on_resources(struct acpi_device *device, int state);
int acpi_power_transition(struct acpi_device *device, int state);
void acpi_turn_off_unused_power_resources(bool init);
void acpi_turn_off_unused_power_resources(void);
/* --------------------------------------------------------------------------
Device Power Management

114
drivers/acpi/power.c
View File

@ -52,7 +52,7 @@ struct acpi_power_resource {
u32 system_level;
u32 order;
unsigned int ref_count;
unsigned int users;
u8 state;
bool wakeup_enabled;
struct mutex resource_lock;
struct list_head dependents;
@ -173,8 +173,6 @@ int acpi_extract_power_resources(union acpi_object *package, unsigned int start,
err = acpi_power_resources_list_add(rhandle, list);
if (err)
break;
to_power_resource(rdev)->users++;
}
if (err)
acpi_power_resources_list_free(list);
@ -182,44 +180,54 @@ int acpi_extract_power_resources(union acpi_object *package, unsigned int start,
return err;
}
static int acpi_power_get_state(acpi_handle handle, int *state)
static int __get_state(acpi_handle handle, u8 *state)
{
acpi_status status = AE_OK;
unsigned long long sta = 0;
if (!handle || !state)
return -EINVAL;
u8 cur_state;
status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
if (ACPI_FAILURE(status))
return -ENODEV;
*state = (sta & 0x01)?ACPI_POWER_RESOURCE_STATE_ON:
ACPI_POWER_RESOURCE_STATE_OFF;
cur_state = sta & ACPI_POWER_RESOURCE_STATE_ON;
acpi_handle_debug(handle, "Power resource is %s\n",
*state ? "on" : "off");
cur_state ? "on" : "off");
*state = cur_state;
return 0;
}
static int acpi_power_get_list_state(struct list_head *list, int *state)
static int acpi_power_get_state(struct acpi_power_resource *resource, u8 *state)
{
if (resource->state == ACPI_POWER_RESOURCE_STATE_UNKNOWN) {
int ret;
ret = __get_state(resource->device.handle, &resource->state);
if (ret)
return ret;
}
*state = resource->state;
return 0;
}
static int acpi_power_get_list_state(struct list_head *list, u8 *state)
{
struct acpi_power_resource_entry *entry;
int cur_state;
u8 cur_state = ACPI_POWER_RESOURCE_STATE_OFF;
if (!list || !state)
return -EINVAL;
/* The state of the list is 'on' IFF all resources are 'on'. */
cur_state = 0;
list_for_each_entry(entry, list, node) {
struct acpi_power_resource *resource = entry->resource;
acpi_handle handle = resource->device.handle;
int result;
mutex_lock(&resource->resource_lock);
result = acpi_power_get_state(handle, &cur_state);
result = acpi_power_get_state(resource, &cur_state);
mutex_unlock(&resource->resource_lock);
if (result)
return result;
@ -352,8 +360,12 @@ static int __acpi_power_on(struct acpi_power_resource *resource)
acpi_status status = AE_OK;
status = acpi_evaluate_object(resource->device.handle, "_ON", NULL, NULL);
if (ACPI_FAILURE(status))
if (ACPI_FAILURE(status)) {
resource->state = ACPI_POWER_RESOURCE_STATE_UNKNOWN;
return -ENODEV;
}
resource->state = ACPI_POWER_RESOURCE_STATE_ON;
pr_debug("Power resource [%s] turned on\n", resource->name);
@ -405,8 +417,12 @@ static int __acpi_power_off(struct acpi_power_resource *resource)
status = acpi_evaluate_object(resource->device.handle, "_OFF",
NULL, NULL);
if (ACPI_FAILURE(status))
if (ACPI_FAILURE(status)) {
resource->state = ACPI_POWER_RESOURCE_STATE_UNKNOWN;
return -ENODEV;
}
resource->state = ACPI_POWER_RESOURCE_STATE_OFF;
pr_debug("Power resource [%s] turned off\n", resource->name);
@ -590,13 +606,12 @@ int acpi_power_wakeup_list_init(struct list_head *list, int *system_level_p)
list_for_each_entry(entry, list, node) {
struct acpi_power_resource *resource = entry->resource;
acpi_handle handle = resource->device.handle;
int result;
int state;
u8 state;
mutex_lock(&resource->resource_lock);
result = acpi_power_get_state(handle, &state);
result = acpi_power_get_state(resource, &state);
if (result) {
mutex_unlock(&resource->resource_lock);
return result;
@ -789,8 +804,8 @@ int acpi_disable_wakeup_device_power(struct acpi_device *dev)
int acpi_power_get_inferred_state(struct acpi_device *device, int *state)
{
u8 list_state = ACPI_POWER_RESOURCE_STATE_OFF;
int result = 0;
int list_state = 0;
int i = 0;
if (!device || !state)
@ -919,7 +934,7 @@ struct acpi_device *acpi_add_power_resource(acpi_handle handle)
union acpi_object acpi_object;
struct acpi_buffer buffer = { sizeof(acpi_object), &acpi_object };
acpi_status status;
int state, result = -ENODEV;
int result;
acpi_bus_get_device(handle, &device);
if (device)
@ -946,13 +961,9 @@ struct acpi_device *acpi_add_power_resource(acpi_handle handle)
resource->system_level = acpi_object.power_resource.system_level;
resource->order = acpi_object.power_resource.resource_order;
resource->state = ACPI_POWER_RESOURCE_STATE_UNKNOWN;
result = acpi_power_get_state(handle, &state);
if (result)
goto err;
pr_info("%s [%s] (%s)\n", acpi_device_name(device),
acpi_device_bid(device), state ? "on" : "off");
pr_info("%s [%s]\n", acpi_device_name(device), acpi_device_bid(device));
device->flags.match_driver = true;
result = acpi_device_add(device, acpi_release_power_resource);
@ -979,11 +990,13 @@ void acpi_resume_power_resources(void)
mutex_lock(&power_resource_list_lock);
list_for_each_entry(resource, &acpi_power_resource_list, list_node) {
int result, state;
int result;
u8 state;
mutex_lock(&resource->resource_lock);
result = acpi_power_get_state(resource->device.handle, &state);
resource->state = ACPI_POWER_RESOURCE_STATE_UNKNOWN;
result = acpi_power_get_state(resource, &state);
if (result) {
mutex_unlock(&resource->resource_lock);
continue;
@ -1002,38 +1015,10 @@ void acpi_resume_power_resources(void)
}
#endif
static void acpi_power_turn_off_if_unused(struct acpi_power_resource *resource,
bool init)
{
if (resource->ref_count > 0)
return;
if (init) {
if (resource->users > 0)
return;
} else {
int result, state;
result = acpi_power_get_state(resource->device.handle, &state);
if (result || state == ACPI_POWER_RESOURCE_STATE_OFF)
return;
}
dev_info(&resource->device.dev, "Turning OFF\n");
__acpi_power_off(resource);
}
/**
* acpi_turn_off_unused_power_resources - Turn off power resources not in use.
* @init: Control switch.
*
* If @ainit is set, unconditionally turn off all of the ACPI power resources
* without any users.
*
* Otherwise, turn off all ACPI power resources without active references (that
* is, the ones that should be "off" at the moment) that are "on".
*/
void acpi_turn_off_unused_power_resources(bool init)
void acpi_turn_off_unused_power_resources(void)
{
struct acpi_power_resource *resource;
@ -1042,7 +1027,16 @@ void acpi_turn_off_unused_power_resources(bool init)
list_for_each_entry_reverse(resource, &acpi_power_resource_list, list_node) {
mutex_lock(&resource->resource_lock);
acpi_power_turn_off_if_unused(resource, init);
/*
* Turn off power resources in an unknown state too, because the
* platform firmware on some system expects the OS to turn off
* power resources without any users unconditionally.
*/
if (!resource->ref_count &&
resource->state != ACPI_POWER_RESOURCE_STATE_OFF) {
dev_info(&resource->device.dev, "Turning OFF\n");
__acpi_power_off(resource);
}
mutex_unlock(&resource->resource_lock);
}

2
drivers/acpi/scan.c
View File

@ -2360,7 +2360,7 @@ int __init acpi_scan_init(void)
}
}
acpi_turn_off_unused_power_resources(true);
acpi_turn_off_unused_power_resources();
acpi_scan_initialized = true;

2
drivers/acpi/sleep.c
View File

@ -504,7 +504,7 @@ static void acpi_pm_start(u32 acpi_state)
*/
static void acpi_pm_end(void)
{
acpi_turn_off_unused_power_resources(false);
acpi_turn_off_unused_power_resources();
acpi_scan_lock_release();
/*
* This is necessary in case acpi_pm_finish() is not called during a

4
drivers/acpi/x86/s2idle.c
View File

@ -42,6 +42,8 @@ static const struct acpi_device_id lps0_device_ids[] = {
/* AMD */
#define ACPI_LPS0_DSM_UUID_AMD "e3f32452-febc-43ce-9039-932122d37721"
#define ACPI_LPS0_ENTRY_AMD 2
#define ACPI_LPS0_EXIT_AMD 3
#define ACPI_LPS0_SCREEN_OFF_AMD 4
#define ACPI_LPS0_SCREEN_ON_AMD 5
@ -408,6 +410,7 @@ int acpi_s2idle_prepare_late(void)
if (acpi_s2idle_vendor_amd()) {
acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF_AMD);
acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY_AMD);
} else {
acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF);
acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY);
@ -422,6 +425,7 @@ void acpi_s2idle_restore_early(void)
return;
if (acpi_s2idle_vendor_amd()) {
acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT_AMD);
acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON_AMD);
} else {
acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT);