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PM / QoS: Restore DEV_PM_QOS_MIN/MAX_FREQUENCY

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Support for adding per-device frequency limits was removed in
commit 2aac8bdf7a ("PM: QoS: Drop frequency QoS types from device PM QoS")
after cpufreq switched to use a new "freq_constraints" construct.

Restore support for per-device freq limits but base this upon
freq_constraints. This is primarily meant to be used by the devfreq
subsystem.

This removes the "static" marking on freq_qos_apply but does not export
it for modules.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Tested-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Leonard Crestez
2019-11-26 17:17:13 +02:00
committed by Rafael J. Wysocki
parent 342035f66c
commit 36a8015f89
3 changed files with 82 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
include/linux/pm_qos.h
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@@ -34,6 +34,8 @@ enum pm_qos_flags_status {
#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT PM_QOS_LATENCY_ANY
#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS PM_QOS_LATENCY_ANY_NS
#define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE 0
#define PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE 0
#define PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE FREQ_QOS_MAX_DEFAULT_VALUE
#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1)
#define PM_QOS_FLAG_NO_POWER_OFF (1 << 0)
@@ -101,6 +103,8 @@ struct freq_qos_request {
enum dev_pm_qos_req_type {
DEV_PM_QOS_RESUME_LATENCY = 1,
DEV_PM_QOS_LATENCY_TOLERANCE,
DEV_PM_QOS_MIN_FREQUENCY,
DEV_PM_QOS_MAX_FREQUENCY,
DEV_PM_QOS_FLAGS,
};
@@ -109,6 +113,7 @@ struct dev_pm_qos_request {
union {
struct plist_node pnode;
struct pm_qos_flags_request flr;
struct freq_qos_request freq;
} data;
struct device *dev;
};
@@ -116,6 +121,7 @@ struct dev_pm_qos_request {
struct dev_pm_qos {
struct pm_qos_constraints resume_latency;
struct pm_qos_constraints latency_tolerance;
struct freq_constraints freq;
struct pm_qos_flags flags;
struct dev_pm_qos_request *resume_latency_req;
struct dev_pm_qos_request *latency_tolerance_req;
@@ -214,6 +220,10 @@ static inline s32 dev_pm_qos_read_value(struct device *dev,
switch (type) {
case DEV_PM_QOS_RESUME_LATENCY:
return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
case DEV_PM_QOS_MIN_FREQUENCY:
return PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE;
case DEV_PM_QOS_MAX_FREQUENCY:
return PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE;
default:
WARN_ON(1);
return 0;
@@ -293,6 +303,8 @@ int freq_qos_add_request(struct freq_constraints *qos,
enum freq_qos_req_type type, s32 value);
int freq_qos_update_request(struct freq_qos_request *req, s32 new_value);
int freq_qos_remove_request(struct freq_qos_request *req);
int freq_qos_apply(struct freq_qos_request *req,
enum pm_qos_req_action action, s32 value);
int freq_qos_add_notifier(struct freq_constraints *qos,
enum freq_qos_req_type type,