Re: Bluetooth not working anymore due to too agressive PM in hci_bcm ? (was: [PATCH v5 5/5] Bluetooth: hci_bcm: Add suspend/resume runtime PM functions)

["Jérôme de Bretagne" <jerome.debretagne@gmail.com>]

[-- Attachment #1: Type: text/plain, Size: 1555 bytes --]

Hi Marcel,

> > Using out-of-band gpio/irq which are retrieved from the ACPI device.
> > wakeup can be initiated by host or controller depending which one wants
> > to transfer hci data.
> 
> I am actually curious if HCI remote wakeup might not work. So the HID
> mouse (I assume Classic here) will initiate a HCI Create Connection which
> will result in a HCI Connection Request. So that wakeup event needs to be
> allowed. I am curious if we might not set that correctly.

That's correct, my HID mouse is using standard Bluetooth BR/EDR, not LE. 


> I would need to see the btmon trace from the controller initialization
> (start btmon before calling btattach). I am no longer sure that this has
> been tested with UART based controllers. On USB the remote wakeup works.

Here you go, I'm attaching traces taken with btmon:

1/ btmon.thinkpad8-init: the one you've asked, showing the controller init


and 2 other ones, just in case:

2/ btmon.thinkpad8-connecting: showing the mouse connecting right after the init 1/ so still properly detected at that time and doing some cursor moves

3/ btmon.thinkpad8-not-connecting: traces taken if the mouse is not switched on during the controller initialization, but only a bit later (roughly 30s or 1min). Switching on the mouse then shows simply no trace at all.


> If the events for connection creation and remote wakeup set correctly,
> then it is some GPIO or Broadcom vendor specific thing.

>From the attached traces 1/, do the events seem to be set up correctly
according to you?

Regards,
Jérôme

[-- Attachment #2: btmon.thinkpad8-init.btsnoop --]
[-- Type: application/octet-stream, Size: 53920 bytes --]

[-- Attachment #3: btmon.thinkpad8-connecting.btsnoop --]
[-- Type: application/octet-stream, Size: 4858 bytes --]

[-- Attachment #4: btmon.thinkpad8-not-connecting.btsnoop --]
[-- Type: application/octet-stream, Size: 342 bytes --]