[PATCH RFC v2 0/8] wifi: ath11k: hibernation support

[Jeff Johnson]

On 11/27/2023 8:20 AM, Kalle Valo wrote:
> From: Kalle Valo <quic_kvalo at quicinc.com>
> 
> Currently in ath11k we keep the firmware running on the WLAN device when the
> network interface (wlan0) is down. The problem is that this will break
> hibernation, obviously the firmware can't be running after the whole system is
> powered off. To power down the ath11k firmware for suspend/hibernation some
> changes both in MHI subsystem and ath11k is needed.
> 
> This patchset fixes a longstanding bug report about broken hibernation support:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=214649
> 
> This patchset is marked as RFC as it requires changes in MHI subsystem. Also
> this has been tested only on WCN6855, need to test also on more AP based
> chipsets like IPQ8074 and QCN9074.
> 
> The patches are also available at:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/log/?h=ath11k-hibernation-support
> 
> Earlier versions of this patchset have been tested by multiple users with
> positive results.
> 
> v2:
> 
> * rebase to ath-202311221826 (6.7.0-rc2-wt-ath+)
> 
> * 'bus: mhi: host: add mhi_power_down_no_destroy()': fix null state string for
>    DEV_ST_TRANSITION_DISABLE_DESTROY_DEVICE
> 
> * 'bus: mhi: host: add new interfaces to handle MHI channels
>   directly': fix typos in comments
> 
> * 'bus: mhi: host: add new interfaces to handle MHI channels directly': honour
>    initial autoqueue configuration
> 
> * 'bus: mhi: host: add new interfaces to handle MHI channels
>    directly': don't prepare/unprepare MHI devices that don't match
>    with a MHI client driver
> 
> * 'wifi: ath11k: remove MHI LOOPBACK channels': remove LOOPBACK channels for QCN9074 as well
> 
> v1: https://lore.kernel.org/mhi/20231110102202.3168243-1-kvalo@kernel.org/
> 
> Baochen Qiang (7):
>   bus: mhi: host: add mhi_power_down_no_destroy()
>   bus: mhi: host: add new interfaces to handle MHI channels directly
>   wifi: ath11k: handle irq enable/disable in several code path
>   wifi: ath11k: remove MHI LOOPBACK channels
>   wifi: ath11k: do not dump SRNG statistics during resume
>   wifi: ath11k: fix warning on DMA ring capabilities event
>   wifi: ath11k: support hibernation
> 
> Kalle Valo (1):
>   wifi: ath11k: thermal: don't try to register multiple times
> 
>  drivers/bus/mhi/host/init.c               |   1 +
>  drivers/bus/mhi/host/internal.h           |   1 +
>  drivers/bus/mhi/host/main.c               | 107 ++++++++++++++++++++++
>  drivers/bus/mhi/host/pm.c                 |  26 ++++--
>  drivers/net/wireless/ath/ath11k/ahb.c     |   8 +-
>  drivers/net/wireless/ath/ath11k/core.c    |  44 +++++----
>  drivers/net/wireless/ath/ath11k/core.h    |   2 +
>  drivers/net/wireless/ath/ath11k/hif.h     |  12 +--
>  drivers/net/wireless/ath/ath11k/mhi.c     |  77 ++++------------
>  drivers/net/wireless/ath/ath11k/mhi.h     |   4 +-
>  drivers/net/wireless/ath/ath11k/pci.c     |  55 +++++++++--
>  drivers/net/wireless/ath/ath11k/qmi.c     |   7 +-
>  drivers/net/wireless/ath/ath11k/thermal.c |   3 +
>  drivers/net/wireless/ath/ath11k/wmi.c     |   1 +
>  include/linux/mhi.h                       |  47 +++++++++-
>  15 files changed, 285 insertions(+), 110 deletions(-)
> 
> 
> base-commit: 16a212b4f33c4edd9ce9a9e0953b5389216e8ed9

Series LGTM. Will add appropriate tags when this is no longer RFC