samsung-sm8650/android_kernel_samsung_sm8650-modules
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

qcacmn: Add runtime PM put sync API

Browse Source 
Runtime PM put sync API will make sure runtime PM suspend happen
right away if usage count is 0.

Change-Id: I70f6fe4ed015195874ef4cac61de9ef5d739b689
CRs-fixed: 2502382
This commit is contained in:
Yue Ma
2019-08-01 19:34:10 -07:00
committed by nshrivas
parent 057b7aeb5f
commit 5b5238a050
2 changed files with 49 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
hif/inc/hif.h
View File

@@ -845,6 +845,7 @@ void hif_clear_stats(struct hif_opaque_softc *hif_ctx);
struct hif_pm_runtime_lock;
void hif_fastpath_resume(struct hif_opaque_softc *hif_ctx);
int hif_pm_runtime_get_sync(struct hif_opaque_softc *hif_ctx);
int hif_pm_runtime_put_sync_suspend(struct hif_opaque_softc *hif_ctx);
int hif_pm_runtime_request_resume(struct hif_opaque_softc *hif_ctx);
int hif_pm_runtime_get(struct hif_opaque_softc *hif_ctx);
void hif_pm_runtime_get_noresume(struct hif_opaque_softc *hif_ctx);
@@ -871,6 +872,9 @@ static inline void hif_fastpath_resume(struct hif_opaque_softc *hif_ctx) {}
static inline int hif_pm_runtime_get_sync(struct hif_opaque_softc *hif_ctx)
{ return 0; }
static inline int
hif_pm_runtime_put_sync_suspend(struct hif_opaque_softc *hif_ctx)
{ return 0; }
static inline int
hif_pm_runtime_request_resume(struct hif_opaque_softc *hif_ctx)
{ return 0; }
static inline void hif_pm_runtime_get_noresume(struct hif_opaque_softc *hif_ctx)

47
hif/src/pcie/if_pci.c
View File

@@ -3868,9 +3868,9 @@ void hif_pci_irq_disable(struct hif_softc *scn, int ce_id)
#ifdef FEATURE_RUNTIME_PM
/**
* hif_pm_runtime_get_sync() - do a get opperation with sync resume
* hif_pm_runtime_get_sync() - do a get operation with sync resume
*
* A get opperation will prevent a runtime suspend until a corresponding
* A get operation will prevent a runtime suspend until a corresponding
* put is done. Unlike hif_pm_runtime_get(), this API will do a sync
* resume instead of requesting a resume if it is runtime PM suspended
* so it can only be called in non-atomic context.
@@ -3882,11 +3882,17 @@ void hif_pci_irq_disable(struct hif_softc *scn, int ce_id)
int hif_pm_runtime_get_sync(struct hif_opaque_softc *hif_ctx)
{
struct hif_pci_softc *sc = HIF_GET_PCI_SOFTC(hif_ctx);
int pm_state;
int ret;
if (!sc)
return -EINVAL;
pm_state = qdf_atomic_read(&sc->pm_state);
if (pm_state == HIF_PM_RUNTIME_STATE_SUSPENDED)
HIF_INFO("Runtime PM resume is requested by %ps",
(void *)_RET_IP_);
sc->pm_stats.runtime_get++;
ret = pm_runtime_get_sync(sc->dev);
@@ -3906,6 +3912,43 @@ int hif_pm_runtime_get_sync(struct hif_opaque_softc *hif_ctx)
return ret;
}
/**
* hif_pm_runtime_put_sync_suspend() - do a put operation with sync suspend
*
* This API will do a runtime put operation followed by a sync suspend if usage
* count is 0 so it can only be called in non-atomic context.
*
* @hif_ctx: pointer of HIF context
*
* Return: 0 for success otherwise an error code
*/
int hif_pm_runtime_put_sync_suspend(struct hif_opaque_softc *hif_ctx)
{
struct hif_pci_softc *sc = HIF_GET_PCI_SOFTC(hif_ctx);
int usage_count, pm_state;
char *err = NULL;
if (!sc)
return -EINVAL;
usage_count = atomic_read(&sc->dev->power.usage_count);
if (usage_count == 1) {
pm_state = qdf_atomic_read(&sc->pm_state);
if (pm_state == HIF_PM_RUNTIME_STATE_NONE)
err = "Ignore unexpected Put as runtime PM is disabled";
} else if (usage_count == 0) {
err = "Put without a Get Operation";
}
if (err) {
hif_pci_runtime_pm_warn(sc, err);
return -EINVAL;
}
sc->pm_stats.runtime_put++;
return pm_runtime_put_sync_suspend(sc->dev);
}
int hif_pm_runtime_request_resume(struct hif_opaque_softc *hif_ctx)
{
struct hif_pci_softc *sc = HIF_GET_PCI_SOFTC(hif_ctx);