bool wcd9xxx_lock_sleep(
struct wcd9xxx_core_resource *wcd9xxx_res)
{
enum wcd9xxx_pm_state os;
mutex_lock(&wcd9xxx_res->pm_lock);
if (wcd9xxx_res->wlock_holders++ == 0) {
pr_debug("%s: holding wake lock\n", __func__);
pm_qos_update_request(&wcd9xxx_res->pm_qos_req,
msm_cpuidle_get_deep_idle_latency());
}
mutex_unlock(&wcd9xxx_res->pm_lock);
if (!wait_event_timeout(wcd9xxx_res->pm_wq,
((os = wcd9xxx_pm_cmpxchg(wcd9xxx_res,
WCD9XXX_PM_SLEEPABLE,
WCD9XXX_PM_AWAKE)) ==
WCD9XXX_PM_SLEEPABLE ||
(os == WCD9XXX_PM_AWAKE)),
msecs_to_jiffies(
WCD9XXX_SYSTEM_RESUME_TIMEOUT_MS))) {
pr_warn("%s: system didn't resume within %dms, s %d, w %d\n",
__func__,
WCD9XXX_SYSTEM_RESUME_TIMEOUT_MS, wcd9xxx_res->pm_state,
wcd9xxx_res->wlock_holders);
wcd9xxx_unlock_sleep(wcd9xxx_res);
return false;
}
wake_up_all(&wcd9xxx_res->pm_wq);
return true;
}
bool wcd9xxx_lock_sleep(
struct wcd9xxx_core_resource *wcd9xxx_res)
{
enum wcd9xxx_pm_state os;
/*
* wcd9xxx_{lock/unlock}_sleep will be called by wcd9xxx_irq_thread
* and its subroutines only motly.
* but btn0_lpress_fn is not wcd9xxx_irq_thread's subroutine and
* It can race with wcd9xxx_irq_thread.
* So need to embrace wlock_holders with mutex.
*
* If system didn't resume, we can simply return false so codec driver's
* IRQ handler can return without handling IRQ.
* As interrupt line is still active, codec will have another IRQ to
* retry shortly.
*/
mutex_lock(&wcd9xxx_res->pm_lock);
if (wcd9xxx_res->wlock_holders++ == 0) {
pr_debug("%s: holding wake lock\n", __func__);
pm_qos_update_request(&wcd9xxx_res->pm_qos_req,
msm_cpuidle_get_deep_idle_latency());
}
mutex_unlock(&wcd9xxx_res->pm_lock);
if (!wait_event_timeout(wcd9xxx_res->pm_wq,
((os = wcd9xxx_pm_cmpxchg(wcd9xxx_res,
WCD9XXX_PM_SLEEPABLE,
WCD9XXX_PM_AWAKE)) ==
WCD9XXX_PM_SLEEPABLE ||
(os == WCD9XXX_PM_AWAKE)),
msecs_to_jiffies(
WCD9XXX_SYSTEM_RESUME_TIMEOUT_MS))) {
pr_warn("%s: system didn't resume within %dms, s %d, w %d\n",
__func__,
WCD9XXX_SYSTEM_RESUME_TIMEOUT_MS, wcd9xxx_res->pm_state,
wcd9xxx_res->wlock_holders);
wcd9xxx_unlock_sleep(wcd9xxx_res);
return false;
}
wake_up_all(&wcd9xxx_res->pm_wq);
return true;
}
