xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'pm-qos'

Browse Source 
* pm-qos:
  PM / QoS: Handle device PM QoS flags while removing constraints
  PM / QoS: Resume device before exposing/hiding PM QoS flags
  PM / QoS: Document request manipulation requirement for flags
  PM / QoS: Fix a free error in the dev_pm_qos_constraints_destroy()
  PM / QoS: Fix the return value of dev_pm_qos_update_request()
  PM / ACPI: Take device PM QoS flags into account
  PM / Domains: Check device PM QoS flags in pm_genpd_poweroff()
  PM / QoS: Make it possible to expose PM QoS device flags to user space
  PM / QoS: Introduce PM QoS device flags support
  PM / QoS: Prepare struct dev_pm_qos_request for more request types
  PM / QoS: Introduce request and constraint data types for PM QoS flags
  PM / QoS: Prepare device structure for adding more constraint types
This commit is contained in:
Rafael J. Wysocki
2012-11-29 21:40:32 +01:00
parent 9489e9dcae 35546bd477
commit c8b6817103
12 changed files with 551 additions and 90 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
kernel/power/qos.c
View File

@@ -212,6 +212,69 @@ int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
}
}
/**
* pm_qos_flags_remove_req - Remove device PM QoS flags request.
* @pqf: Device PM QoS flags set to remove the request from.
* @req: Request to remove from the set.
*/
static void pm_qos_flags_remove_req(struct pm_qos_flags *pqf,
struct pm_qos_flags_request *req)
{
s32 val = 0;
list_del(&req->node);
list_for_each_entry(req, &pqf->list, node)
val |= req->flags;
pqf->effective_flags = val;
}
/**
* pm_qos_update_flags - Update a set of PM QoS flags.
* @pqf: Set of flags to update.
* @req: Request to add to the set, to modify, or to remove from the set.
* @action: Action to take on the set.
* @val: Value of the request to add or modify.
*
* Update the given set of PM QoS flags and call notifiers if the aggregate
* value has changed. Returns 1 if the aggregate constraint value has changed,
* 0 otherwise.
*/
bool pm_qos_update_flags(struct pm_qos_flags *pqf,
struct pm_qos_flags_request *req,
enum pm_qos_req_action action, s32 val)
{
unsigned long irqflags;
s32 prev_value, curr_value;
spin_lock_irqsave(&pm_qos_lock, irqflags);
prev_value = list_empty(&pqf->list) ? 0 : pqf->effective_flags;
switch (action) {
case PM_QOS_REMOVE_REQ:
pm_qos_flags_remove_req(pqf, req);
break;
case PM_QOS_UPDATE_REQ:
pm_qos_flags_remove_req(pqf, req);
case PM_QOS_ADD_REQ:
req->flags = val;
INIT_LIST_HEAD(&req->node);
list_add_tail(&req->node, &pqf->list);
pqf->effective_flags |= val;
break;
default:
/* no action */
;
}
curr_value = list_empty(&pqf->list) ? 0 : pqf->effective_flags;
spin_unlock_irqrestore(&pm_qos_lock, irqflags);
return prev_value != curr_value;
}
/**
* pm_qos_request - returns current system wide qos expectation
* @pm_qos_class: identification of which qos value is requested