On 2/27/23 07:14, Kalle Valo wrote:
Mario Limonciello <mario.limonciello@xxxxxxx> writes:
On 2/27/23 06:36, Kalle Valo wrote:
Mario Limonciello <mario.limonciello@xxxxxxx> writes:
When WCN6855 firmware versions less than 0x110B196E are used with
an AMD APU and the user puts the system into s2idle spurious wakeup
events can occur. These are difficult to attribute to the WLAN F/W
so add a warning to the kernel driver to give users a hint where
to look.
This was tested on WCN6855 and a Lenovo Z13 with the following
firmware versions:
WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.9
WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.23
Link: http://lists.infradead.org/pipermail/ath11k/2023-February/004024.html
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2377
Link: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/2006458
Link:
https://lore.kernel.org/linux-gpio/20221012221028.4817-1-mario.limonciello@xxxxxxx/
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
[...]
+static void ath11k_check_s2idle_bug(struct ath11k_base *ab)
+{
+ struct pci_dev *rdev;
+
+ if (pm_suspend_target_state != PM_SUSPEND_TO_IDLE)
+ return;
+
+ if (ab->id.device != WCN6855_DEVICE_ID)
+ return;
+
+ if (ab->qmi.target.fw_version >= WCN6855_S2IDLE_VER)
+ return;
+
+ rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0));
+ if (rdev->vendor == PCI_VENDOR_ID_AMD)
+ ath11k_warn(ab, "fw_version 0x%x may cause spurious wakeups.
Upgrade to 0x%x or later.",
+ ab->qmi.target.fw_version, WCN6855_S2IDLE_VER);
I understand the reasons for this warning but I don't really trust the
check 'ab->qmi.target.fw_version >= WCN6855_S2IDLE_VER'. I don't know
how the firmware team populates the fw_version so I'm worried that if we
ever switch to a different firmware branch (or similar) this warning
might all of sudden start triggering for the users.
In that case, maybe would it be better to just have a list of the
public firmware with issue and ensure it doesn't match one of those?
You mean ath11k checking for known broken versions and reporting that?
We have so many different firmwares to support in ath11k, I'm not really
keen on adding tests for a specific version.
I checked and only found a total of 7 firmware versions published for
WCN6855 at your ath11k-firmware repo. I'm not sure how many went to
linux-firmware. But it seems like a relatively small list to have.
We have a list of known important bugs in the wiki:
https://wireless.wiki.kernel.org/en/users/drivers/ath11k#known_bugslimitations
What about adding the issue there, would that get more exposure to the
bug and hopefully the users would upgrade the firmware?
The problem is when this happens users have no way to know it's even
caused by wireless. So why would they go looking at the wireless wiki?
The GPIO used for WLAN is different from design to design so we can't
put it in the GPIO driver. There are plenty of designs that have valid
reasons to wakeup from other GPIOs as well so it can't just be the GPIO
driver IRQ.
