mbox series

[SRU,PULL,linux-firmware,Noble] WCN6856 Wi-FI Unavailable and no function during suspend stress

Message ID 20240111160837.2005028-1-vicamo.yang@canonical.com
State New
Headers show
Series [SRU,PULL,linux-firmware,Noble] WCN6856 Wi-FI Unavailable and no function during suspend stress | expand

Pull-request

https://kernel.ubuntu.com/gitea/vicamo/linux-firmware.git bug-2048977/WCN6856-suspend-resume-wifi-lost/noble

Message

You-Sheng Yang Jan. 11, 2024, 4:08 p.m. UTC 
BugLink: https://bugs.launchpad.net/bugs/2048977

[Impact]

Due to a known silicon limitation, the following sequence is needed while
initialing the PCIE device on a certain devices with ASMedia chipset involved:

1. 'hot reset' assert
2. 2nd PCIe reset' assert
3. Asmedia 'hot reset' deassert
4. PT21 GPIO13 2nd PCIe reset' deassert.

In certain caes, the WIFI link training failed while system resumes from
suspend.

[Fix]

Upstream commits:
* 17509e53b97b ("ath11k: WCN6855 hw2.0: update to WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.36")
* 324cc56975d7 ("ath11k: WCN6855 hw2.0: update board-2.bin")

And Jammy takes an additional commit d1dc30480fef ("ath11k: WCN6855 hw2.0:
update board-2.bin") to forfill git history dependency.

And while we pulled a firmware fix from github.com/kvalo/ath11k-firmware in
bug 2042534, it fails to clean cherry-pick of commit 17509e53b97b. Since Noble
has not yet accept the PR for bug 2042534, it has no such problem at this
moment.

[Test Case]

This can be reproduced with suspend/resume stress test.

$ checkbox-cli run com.canonical.certification::stress-suspend-30-cycles-with-reboots-automated

[Where problems could occur]

Opaque firmware update. No known issue found yet after the update.

[Other Info]

This affects all series with WCN6855/WCN6856 support, Noble/Mantic/Lunar and
Jammy for oem-6.5 included.

----------------------------------------------------------------
The following changes since commit 387c2bd0ad70b04df0c3ffea75e25b08f406e4fc:

  UBUNTU: Ubuntu-20230919.git3672ccab-0ubuntu2.2 (2023-10-10 11:48:12 +0200)

are available in the Git repository at:

  https://kernel.ubuntu.com/gitea/vicamo/linux-firmware.git bug-2048977/WCN6856-suspend-resume-wifi-lost/noble

for you to fetch changes up to ced9ebf384d489cb2952c104365833777cd888e8:

  ath11k: WCN6855 hw2.0: update to WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.36 (2024-01-11 23:39:35 +0800)

----------------------------------------------------------------
Kalle Valo (2):
      ath11k: WCN6855 hw2.0: update board-2.bin
      ath11k: WCN6855 hw2.0: update to WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.36

 WHENCE                           |   2 +-
 ath11k/WCN6855/hw2.0/amss.bin    | Bin 4980736 -> 4988928 bytes
 ath11k/WCN6855/hw2.0/board-2.bin | Bin 6278772 -> 6308684 bytes
 3 files changed, 1 insertion(+), 1 deletion(-)