This is a note to let you know that I've just added the patch titled
ACPI: x86: s2idle: Force AMD GUID/_REV 2 on HP Elitebook 865
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpi-x86-s2idle-force-amd-guid-_rev-2-on-hp-elitebook-865.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3ea45390e9c0d35805ef8357ace55594fd4233d0 Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello@xxxxxxx>
Date: Thu, 15 Dec 2022 13:16:15 -0600
Subject: ACPI: x86: s2idle: Force AMD GUID/_REV 2 on HP Elitebook 865
From: Mario Limonciello <mario.limonciello@xxxxxxx>
commit 3ea45390e9c0d35805ef8357ace55594fd4233d0 upstream.
HP Elitebook 865 supports both the AMD GUID w/ _REV 2 and Microsoft
GUID with _REV 0. Both have very similar code but the AMD GUID
has a special workaround that is specific to a problem with
spurious wakeups on systems with Qualcomm WLAN.
This is believed to be a bug in the Qualcomm WLAN F/W (it doesn't
affect any other WLAN H/W). If this WLAN firmware is fixed this
quirk can be dropped.
Cc: stable@xxxxxxxxxxxxxxx # 6.1
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/x86/s2idle.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c
index 5350c73564b6..422415cb14f4 100644
--- a/drivers/acpi/x86/s2idle.c
+++ b/drivers/acpi/x86/s2idle.c
@@ -401,6 +401,13 @@ static const struct acpi_device_id amd_hid_ids[] = {
{}
};
+static int lps0_prefer_amd(const struct dmi_system_id *id)
+{
+ pr_debug("Using AMD GUID w/ _REV 2.\n");
+ rev_id = 2;
+ return 0;
+}
+
static int lps0_prefer_microsoft(const struct dmi_system_id *id)
{
pr_debug("Preferring Microsoft GUID.\n");
@@ -462,6 +469,19 @@ static const struct dmi_system_id s2idle_dmi_table[] __initconst = {
DMI_MATCH(DMI_PRODUCT_NAME, "ROG Flow X16 GV601"),
},
},
+ {
+ /*
+ * AMD Rembrandt based HP EliteBook 835/845/865 G9
+ * Contains specialized AML in AMD/_REV 2 path to avoid
+ * triggering a bug in Qualcomm WLAN firmware. This may be
+ * removed in the future if that firmware is fixed.
+ */
+ .callback = lps0_prefer_amd,
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "HP"),
+ DMI_MATCH(DMI_BOARD_NAME, "8990"),
+ },
+ },
{}
};
--
2.39.0
Patches currently in stable-queue which might be from mario.limonciello@xxxxxxx are
queue-6.1/acpi-x86-s2idle-force-amd-guid-_rev-2-on-hp-elitebook-865.patch
queue-6.1/acpi-x86-s2idle-stop-using-amd-specific-codepath-for-rembrandt.patch
