On Tue, Aug 23, 2011 at 7:49 PM, Santosh <santosh.shilimkar@xxxxxx> wrote:
> Rafael, Kevin,
>
> On latest kernel( V3.1-rc1+), the subsystem(driver) suspend
> callbacks are not getting called because power domain callbcaks
> are populated.
>
> And as per commit 4d27e9dc{PM: Make power domain callbacks take
> precedence over subsystem ones}, it's expected bahavior.
>
> Who is suppose to call the driver suspend callback?
> Some drivers/subsystem would have state machine which needs to
> be suspended.
>
> Is the power domain suspend callback, suppose to take care of
> it ? If yes, then that seems to be missing for OMAP.
>
Looks like from
_od_suspend_noirq
-> pm_generic_suspend_noirq
-> __pm_generic_call(dev, PM_EVENT_SUSPEND, true);
--> [..]
case PM_EVENT_SUSPEND:
callback = noirq ? pm->suspend_noirq : pm->suspend;
shouldn't we call pm_generic_suspend from _od_suspend_noirq
rather than calling pm_generic_suspend_noirq?
Since _noirq seems to call .suspend_noirq hook which
most of the them have not populated.
pm_generic_suspend* calls may fail to call legacy platform .suspend hooks?
Looks like we need below change for driver .suspend hook to be called.
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index b6b4097..c2a18ae 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -584,9 +584,9 @@ static int _od_suspend_noirq(struct device *dev)
int ret;
if (od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND)
- return pm_generic_suspend_noirq(dev);
+ return pm_generic_suspend(dev);
- ret = pm_generic_suspend_noirq(dev);
+ ret = pm_generic_suspend(dev);
if (!ret && !pm_runtime_status_suspended(dev)) {
if (pm_generic_runtime_suspend(dev) == 0) {
@@ -604,7 +604,7 @@ static int _od_resume_noirq(struct device *dev)
struct omap_device *od = to_omap_device(pdev);
if (od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND)
- return pm_generic_resume_noirq(dev);
+ return pm_generic_resume(dev);
if ((od->flags & OMAP_DEVICE_SUSPENDED) &&
!pm_runtime_status_suspended(dev)) {
@@ -613,7 +613,7 @@ static int _od_resume_noirq(struct device *dev)
pm_generic_runtime_resume(dev);
}
- return pm_generic_resume_noirq(dev);
+ return pm_generic_resume(dev);
}
#endif
--
Thanks,
Govindraj.R
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