Re: qwz: enable suspend/resume

Marcus Glocker <[email protected]> wrote:

> > 2. Are there firmware differences that justify that qwz(4) diverges
> >    from qwx(4) here.
> 
> Yes, this is the load-bearing reason.  The WCN7850 ath12k firmware
> empirically does not tolerate repeated full core_deinit /
> core_init cycles -- state accumulates inside the chip across cycles
> even with the documented M0-M3 flush and PCI sw_reset, and after a few
> iterations WMI PDEV commands get silently dropped.  Therefore, we have
> adapted the ath12k Linux driver life-cycle model, were the firmware
> stays up for the lifetime of the driver attachment.
> 
> WCN6855 ath11k firmware apparently does not have this bug, since qwx
> with its current pattern has been working reliably.  So qwx should not
> follow qwz here.  Conversely qwz can't follow qwx because of the
> firmware bug -- that's why we diverged.

I wonder if that would have an impact on hibernate.